U.S. patent application number 12/604238 was filed with the patent office on 2010-04-01 for refrigerator, and electric device.
This patent application is currently assigned to Panasonic Corporation. Invention is credited to Tadashi Adachi, Kazuyuki Hamada, Katsunori Horii, Kenichi Kakita, Toyoshi Kamisako, Tosiaki Mamemoto, Kiyoshi Mori, Kazuya Nakanishi, Kenichi Okabe, Yasuyuki Okamoto, Kiyotaka Tabira, Yoshihiro Ueda, Masashi Yuasa.
Application Number | 20100077770 12/604238 |
Document ID | / |
Family ID | 40001930 |
Filed Date | 2010-04-01 |
United States Patent
Application |
20100077770 |
Kind Code |
A1 |
Kamisako; Toyoshi ; et
al. |
April 1, 2010 |
REFRIGERATOR, AND ELECTRIC DEVICE
Abstract
The refrigerator includes a vegetable compartment (107)
thermally insulated by a rear partition (111), and a mist
generation department (139) for atomizing a mist into the vegetable
compartment (107), and the mist generation department (139)
includes a atomizing electrode (135) for atomizing the mist into
the vegetable compartment (107), a voltage applicator (133) for
applying a voltage to the atomizing electrode (135), and a cooling
pin (134) coupled to the atomizing electrode (135), in which the
atomizing electrode (135) is cooled to a temperature lower than the
dew point by a outlet air-duct for freezer compartment (141), and
the moisture in the air is cooled to condense dew on the atomizing
electrode (135), and is atomized as a mist into the vegetable
compartment (107), and dew can be condensed from moisture onto the
atomizing electrode (135) stably and in a simple configuration, and
the freshness of the food is enhanced while the reliability of the
refrigerator is enhanced.
Inventors: |
Kamisako; Toyoshi; (Shiga,
JP) ; Ueda; Yoshihiro; (Nara, JP) ; Nakanishi;
Kazuya; (Shiga, JP) ; Adachi; Tadashi; (Shiga,
JP) ; Hamada; Kazuyuki; (Osaka, JP) ; Tabira;
Kiyotaka; (Shiga, JP) ; Okamoto; Yasuyuki;
(Shiga, JP) ; Okabe; Kenichi; (Shiga, JP) ;
Yuasa; Masashi; (Shiga, JP) ; Kakita; Kenichi;
(Shiga, JP) ; Mori; Kiyoshi; (Shiga, JP) ;
Mamemoto; Tosiaki; (Shiga, JP) ; Horii;
Katsunori; (Shiga, JP) |
Correspondence
Address: |
Brinks Hofer Gilson & Lione/Panasonic
P.O. Box 10395
Chicago
IL
60610
US
|
Assignee: |
Panasonic Corporation
Kadoma-shi
JP
|
Family ID: |
40001930 |
Appl. No.: |
12/604238 |
Filed: |
October 22, 2009 |
Related U.S. Patent Documents
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|
Application
Number |
Filing Date |
Patent Number |
|
|
PCT/JP2008/001083 |
Apr 25, 2008 |
|
|
|
12604238 |
|
|
|
|
Current U.S.
Class: |
62/3.6 ; 62/275;
62/373; 62/407; 62/441 |
Current CPC
Class: |
F25D 2317/0413 20130101;
A23L 3/3409 20130101; F25D 17/042 20130101; A23L 3/363
20130101 |
Class at
Publication: |
62/3.6 ; 62/373;
62/441; 62/407; 62/275 |
International
Class: |
F25B 21/02 20060101
F25B021/02; F25D 17/02 20060101 F25D017/02; F25D 13/02 20060101
F25D013/02; F25D 17/04 20060101 F25D017/04; F25D 21/08 20060101
F25D021/08 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 26, 2007 |
JP |
JP2007-116941 |
Apr 26, 2007 |
JP |
JP2007-116946 |
Apr 26, 2007 |
JP |
JP2007-116948 |
Nov 6, 2007 |
JP |
JP2007-288376 |
Nov 14, 2007 |
JP |
JP2007-295444 |
Nov 14, 2007 |
JP |
JP2007-295451 |
Jan 31, 2008 |
JP |
JP2008-020493 |
Jan 31, 2008 |
JP |
JP2008-020494 |
Mar 31, 2008 |
JP |
JP2008-091152 |
Mar 31, 2008 |
JP |
JP2008-091153 |
Mar 31, 2008 |
JP |
JP2008-091154 |
Claims
1. A refrigerator comprising: a storage compartment defined to be
thermally insulated; a mist making section for spraying mist in the
storage compartment; a mist-making tip, from which mist is sprayed,
provided to the mist making section; an adjusting means which cools
the mist-making tip not higher than a dew point and forms dew from
moisture in air on the mist-making tip for spraying mist in the
storage compartment, and adjusts an amount of water attached to the
mist-making tip; and a heat conduction member coupled to the
mist-making tip, wherein the mist-making tip is rigidly mounted and
electrically connected to a first end of the heat conduction
member, wherein the adjusting means cools or heats the heat
conduction member for adjusting indirectly a temperature of the
mist-making tip.
2. The refrigerator of claim 1, wherein the adjusting means for
adjusting an amount of water attached to the mist-making tip
includes a cooling means and a heating means.
3. The refrigerator of claim 2, wherein the cooling means is a
cooling source generated by a freezing cycle, and a heating means
is a heater.
4. The refrigerator of claim 1, wherein a body of the refrigerator
includes multiple storage compartments and a cooling chamber that
accommodates a cooler for cooling the storage compartments, and
wherein the mist making section is mounted on a partition of the
storage compartments on the cooling chamber side.
5. The refrigerator of claim 2, wherein a body of the refrigerator
includes multiple storage compartments, first storage compartment
of the multiple storage compartments being equipped with the
mist-making section, wherein a second storage compartment disposed
above the first storage compartment is kept at a temperature lower
than that of the first storage compartment for operating as a low
temperature compartment, and wherein the mist-making section is
mounted to a partition of the first storage compartment on a
ceiling side.
6. The refrigerator of claim 5, wherein the refrigerating unit
includes at least one air-duct for transmitting cool air to the
storage compartments or the cooling chamber, and the cooling means
of the adjusting means uses cool air generated in the cooling
chamber.
7. The refrigerator of claim 6, wherein the refrigerating unit
includes at least one air-duct for transmitting cool air to the
storage compartments or the cooling chamber, and the heating means
of the adjusting means is a heater equipped in the freezing cycle
of the refrigerator.
8. The refrigerator of claim 7, wherein the heating means of the
adjusting means is a defrosting heater for melting frost attached
to the cooler.
9. The refrigerator of claim 6, wherein the heating means of the
adjusting means is a heater for a third storage compartment
disposed behind the first storage compartment equipped with the
mist-making section.
10. The refrigerator of claim 1, wherein the adjusting means is a
temperature adjusting means employing a Pertier element.
11. The refrigerator of claim 6, wherein the heating means of the
adjusting means uses heat of a heat exchanger.
12. The refrigerator of claim 1, wherein the mist making section
includes a mist-making electrode and counter electrodes opposing to
the mist-making electrode, and the refrigerator further includes a
voltage applicator for generating a high voltage between the
mist-making electrode and the counter electrodes.
13. The refrigerator of claim 12, further comprising another
storage compartment and a holding member that is disposed in the
another storage compartment and grounded to a reference electric
potential, wherein the voltage applicator generates an electric
potential difference between the mist-making electrode and the
holding member.
Description
RELATED APPLICATIONS
[0001] This application is a continuation of PCT/JP2008/001083,
filed on Apr. 25, 2008, which claims priority to Japanese
Application Nos. JP2007-116941 filed on Apr. 26, 2007,
JP2007-116946 filed on Apr. 26, 2007, JP2007-116948 field on Apr.
26, 2007, JP2007-288376 filed on Nov. 6, 2007, JP2007-295444 filed
on Nov. 14, 2007, JP2007-295451 filed on Nov. 14, 2007,
JP2008-020493 filed on Jan. 31, 2008, JP2008-020494 filed on Jan.
31, 2008, JP2008-091152 filed on Mar. 31, 2008, JP2008-091153 filed
on Mar. 31, 2008, and JP2008-091154 filed on Mar. 31, 2008. The
entire contents of these applications are incorporated herein by
reference.
TECHNICAL FIELD
[0002] The present invention relates to refrigerators which employ
a mist maker in a storage compartment that stores vegetables, and
it also relates to electric appliances using the same mist
maker.
BACKGROUND ART
[0003] Vegetables lose their freshness due to temperature,
humidity, environmental gasses, microbes, and light. The vegetable
is alive, so that it breathes and transpires on its surface. To
maintain the freshness, it is necessary to control the breath and
the transpiration. Numbers of vegetables, except the ones that fall
in disorder due to a low temperature, can be controlled the breath
by a low temperature and can be prevented from the transpiration by
a high humidity. In recent years, a home-use refrigerator has
employed a closed vegetable crisper for keeping the vegetable
fresh. The vegetable stored in this crisper can be cooled at an
appropriate temperature, and yet a high humidity is kept in the
crisper in order to prevent the vegetable from transpiring. Some of
these high-humidity keeping devices use a mist atomizer.
[0004] A conventional refrigerator having this kind of mist
atomizer produces mist with an ultrasonic mist device for
humidifying the inside of a vegetable compartment when the inside
of the compartment stays at a low humidity, thereby preventing the
vegetable from transpiring. This is disclosed in, e.g. Patent
Document 1.
[0005] FIG. 51 shows a refrigerator having a conventional
ultrasonic mist device disclosed in Patent Document 1. FIG. 52
shows a perspective view enlarging an essential part of the
ultrasonic mist device. As shown in FIG. 51, vegetable compartment
21 is placed at a lower part of main housing 26 of refrigerator 20,
and its open front can be closed by door 22 of a drawer, which a
user can slide-out. Partition board 2 separates vegetable
compartment 21 from a refrigerator compartment (not shown) placed
over compartment 21.
[0006] Door 22 of the drawer equipped with hanger 23 fixed to the
inside of door 22, and vegetable crisper 1 which accommodates
foods, e.g. vegetables, is mounted to this hanger 23. The upper
opening of vegetable crisper 1 can be sealed with lid 3. Defrosting
chamber 4 is placed inside vegetable crisper 1, and chamber 4 is
equipped with ultrasonic mist device 5.
[0007] As shown in FIG. 52, ultrasonic mist device 5 includes mist
atomizing port 6, water storage tank 7, humidity sensor 8, and hose
receptacle 9. Tank 7 is connected to defrosted water hose 10 via
receptacle 9, and hose 10 includes purifying filter 11 which
purifies the defrosting water.
[0008] The operation of the foregoing refrigerator is described
hereinafter. A heat exchanging evaporator (not shown) cools the
air, which then flows along the outer face of vegetable crisper 1
and lid 3, thereby cooling crisper 1 and the foods accommodated
inside thereof. The defrosted water produced by a evaporator during
the operation flows through defrosted water hose 10, where the
water is purified by purifying filter 11, and is supplied to water
storage tank 7 of ultrasonic mist device 5.
[0009] Then when humidity sensor 8 senses that the humidity in the
storage compartment is not higher than 90%, mist maker 5 starts
humidifying, so that the humidity can be adjusted at an appropriate
level for the vegetables stored in vegetable crisper 1 to be kept
fresh.
[0010] When humidity sensor 8 senses that the humidity in the
storage compartment is higher than 90%, mist maker 5 stops
excessive humidifying. Mist maker 5 thus can quickly humidify the
inside of vegetable crisper 1 and keep the inside always at a high
humidity, which then allows controlling the transpiration of the
vegetables, thereby keeping the vegetables fresh.
[0011] Another refrigerator equipped with an ozone-water mist maker
is also known in the market; this refrigerator is disclosed in,
e.g. Patent Document 2, and includes an ozone generator, an exhaust
port, a water supply path directly connected to a water pipe, and
an ozone water supply path, which connects to the vegetable
compartment. The ozone generator connects to a water supplier
directly connected to the water pipe, and the exhaust port connects
to the ozone water supply path. An ultrasonic element is placed in
the vegetable crisper. The ozone generated in the ozone generator
contacts with water, and is turned into ozone-water which works as
processing water. The ozone water is supplied to the vegetable
compartment, where the water is turned into mist by the ultrasonic
oscillator, and the mist is atomized in the compartment.
[0012] Although it is not shown in the drawings, a refrigerator is
known as employing a negative-ion generator, a centrifugal force
and Coriolis force generator, and a gas-liquid separator combined
together for maintaining the freshness of vegetables. This
refrigerator is disclosed in, e.g. Patent Document 3.
[0013] The centrifugal force and Coriolis force generator carries
out an ion-dissociation process, a drop-activation process, and a
gas-molecule ionization process, thereby generating adduct negative
ions of water molecules in the air. The gas-liquid separator
separates the air containing the negative ions from the drops,
thereby supplying the air to storage room 8, which is then kept at
a temperature lower than an ordinary temperature and at a humidity
over 80%, and the air therein contains over 1,000 negative ions/cc
for storing foods.
[0014] Storage room 8 filled with this highly humid air allows
cleaning up the inside of room 8 and maintaining the inside of room
8 germfree, so that the foods can be kept fresh thanks to a
germ-removing function and a deodorizing function of the negative
ions contained in the air. These functions have an anabatic
advantage for animals and plants.
[0015] However, the foregoing conventional structure vibrates the
water or ozone water with the ultrasonic oscillator, thereby making
mist. The misted water particles or misted ozone water particles
cannot become fine particles, so that the mist cannot be atomized
uniformly in storage room 8. The mist thus attaches to the surface
of the food at a low ratio. If an atomizing amount is increased or
the atomizing is lasted for a long time in order to increase the
attachment ratio, the vegetable is spoiled by the water, or dew is
formed in storage room 8.
[0016] The conventional structure discussed above supplies water to
the mist maker by using the defrosted water stored in the tank or
the running water, so that the structure needs the hose for the
defrosted water, the purifying filter, or the water supply path
directly connected to the water pipe. This structure is thus
obliged to be complicated.
[0017] The mechanism that ionizes the drops in the storage room
becomes bulky, so that it does not fit for the home-use
refrigerator. A simple ionization will give the drops so poor
oxidizing force that a little advantage can be expected.
[0018] An atomizing of the mist in the refrigerator compartment,
which is roughly sealed and is kept at a low temperature, needs
some care in order to carry out a uniform and stable mist atomizing
for avoiding such problems as excessive dew formation due to
excessive atomizing amount or an inconvenience due to the mist
atomizing in a drought status. However, the conventional structures
discussed above cannot adjust the amount of mist produced although
the mist is atomized in order to keep the storage room at a high
humidity. It is thus possible that an excessive mist atomizing will
form puddles in the room, or spoil the vegetables stored in the
room with the water.
[0019] Patent Document 1: Unexamined Japanese Patent Publication
No. H06-257933
[0020] Patent Document 2: Unexamined Japanese Patent Publication
No. 2000-220949
[0021] Patent Document 3: Unexamined Japanese Patent Publication
No. H07-135945
DISCLOSURE OF INVENTION
[0022] The present invention addressed the problems discussed
above, and aims to provide a refrigerator including a storage
compartment defined such that the compartment is insulated from
heat, and a mist generation department for atomizing mist in the
storage compartment. The mist generation department is formed of a
tip of the department mist, a voltage applicator for applying a
voltage to the tip, and a heat conducting pin coupled to the tip.
An evaporator cools the tip of the department mist down to not
higher than the dew point, thereby condensing the water in the air
into dew, which is then atomized as mist in the storage
compartment.
[0023] This structure allows cooling the heat conducting pin,
thereby cooling indirectly an atomizing electrode without cooling
directly the tip of the department mist. The heat conducting pin
has a greater heat capacity than the tip of the department mist, so
that a direct effect of a temperature change in the evaporator to
the tip of the department mist can be eased. The tip of the
department mist is thus cooled, so that a change in load of the tip
can be suppressed. As a result, the mist can be atomized in a
steady amount.
[0024] The present invention thus condenses the excessive water
vapor in the storage compartment, where fruit and vegetables are
stored, into dew, and applies a voltage to the dewed water, thereby
generating fine mist that tends to attach to the food surface. This
fine mist is atomized in the storage compartment for the fruit and
vegetables to be kept fresh.
[0025] The present invention does not need a complicated structure
including a defrosted water hose which supplies the water to be
used for atomizing mist, a purifying filter, or a water-supply path
directly connected to the water pipe. The present invention
efficiently uses a cooling source produced in a freezing cycle of
the refrigerator, thereby supplying fine mist to the storage
compartment with a simple construction.
[0026] The present invention allows forming dew without fail and
with ease at the tip of the department mist by using excessive
water vapor in the storage compartment, so that the tip of the
department mist can make fine mist on the order of nanometer. This
fine mist is atomized over the fruit and vegetables, and the fine
mist attaches uniformly to the surface thereof, so that the fruit
and vegetables can be kept fresh for a longer time.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 shows a sectional view of a refrigerator in
accordance with a first embodiment of the present invention, where
the refrigerator is cut vertically and parted to right and
left.
[0028] FIG. 2 shows a front view illustrating an essential part of
a rear-end face of a vegetable compartment of the refrigerator in
accordance with the first embodiment.
[0029] FIG. 3 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to the vegetable compartment of
the refrigerator in accordance with the first embodiment.
[0030] FIG. 4 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a second embodiment of the present
invention.
[0031] FIG. 5 shows a sectional view illustrating an essential part
of a periphery of a door-side partition placed over a vegetable
compartment of a refrigerator in accordance with a third embodiment
of the present invention, where the periphery is cut vertically and
parted to right and left.
[0032] FIG. 6 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a fourth embodiment of the present
invention.
[0033] FIG. 7 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a fifth embodiment of the present
invention.
[0034] FIG. 8 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a sixth embodiment of the present
invention.
[0035] FIG. 9 shows a sectional view illustrating a periphery of a
vegetable compartment and its upper partition of a refrigerator in
accordance with a seventh embodiment of the present invention,
where the vegetable compartment and its periphery are cut
vertically and parted to right and left.
[0036] FIG. 10 shows a sectional view of a refrigerator cut along
line B-B in FIG. 9 in accordance with the seventh embodiment.
[0037] FIG. 11 shows a sectional view cut along line C-C in FIG.
10, and the sectional view illustrates an upper partition of a
vegetable compartment of the refrigerator in accordance with the
seventh embodiment, where the upper partition is cut vertically and
parted to right and left.
[0038] FIG. 12 shows a sectional view detailing an ultrasonic mist
device and its periphery in accordance with an eighth embodiment of
the present invention.
[0039] FIG. 13 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a ninth embodiment of the present
invention.
[0040] FIG. 14 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view illustrates an electrostatic atomizing
device and its periphery provided to a vegetable compartment of a
refrigerator in accordance with a tenth embodiment of the present
invention.
[0041] FIG. 15 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with an eleventh embodiment of the
present invention.
[0042] FIG. 16 shows the performance of an atomizing electrode
depending on temperatures and voltage values which monitor a
discharge current, where the voltage values indicate a misted
status in accordance with the eleventh embodiment.
[0043] FIG. 17 shows an experiment result indicating a proper range
of dew formation, where the proper range is found based on the
correlation between the temperature of the atomizing electrode and
the humidity around the atomizing electrode in accordance with the
eleventh embodiment.
[0044] FIG. 18 shows an instance of a functional diagram in
accordance with the eleventh embodiment.
[0045] FIG. 19 shows an instance of a control flowchart in
accordance with the eleventh embodiment.
[0046] FIG. 20 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a twelfth embodiment of the
present invention.
[0047] FIG. 21 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a thirteenth embodiment of the
present invention.
[0048] FIG. 22 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a fourteenth embodiment of the
present invention.
[0049] FIG. 23 shows a sectional view detailing an electrostatic
atomizing device and its periphery in accordance with a fifteenth
embodiment of the present invention.
[0050] FIG. 24 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a sixteenth embodiment of the
present invention.
[0051] FIG. 25 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a seventeenth embodiment of
the present invention.
[0052] FIG. 26 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a eighteenth embodiment of the
present invention.
[0053] FIG. 27 shows a sectional view of a vegetable compartment
and its periphery of a refrigerator in accordance with a nineteenth
embodiment of the present invention.
[0054] FIG. 28 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an ultrasonic mist device and its
periphery in accordance with a 20th embodiment of the present
invention.
[0055] FIG. 29 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a 21st embodiment of the
present invention.
[0056] FIG. 30 shows a timing chart in accordance with the 21st
embodiment.
[0057] FIG. 31 shows a timing chart in accordance with the 21st
embodiment.
[0058] FIG. 32 shows a timing chart in accordance with the 21st
embodiment.
[0059] FIG. 33 shows a timing chart in accordance with the 21st
embodiment.
[0060] FIG. 34 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery in accordance with a 22nd embodiment of the
present invention.
[0061] FIG. 35 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery of a refrigerator in accordance with a 23rd
embodiment of the present invention.
[0062] FIG. 36 shows a sectional view cut along line D-D in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery of a refrigerator in accordance with a 24th
embodiment of the present invention.
[0063] FIG. 37 shows a vertical sectional view of a vegetable
compartment and its periphery of a refrigerator in accordance with
a 25th embodiment of the present invention.
[0064] FIG. 38 shows a sectional view of a vegetable compartment
and its periphery of a refrigerator in accordance with a 26th
embodiment of the present invention.
[0065] FIG. 39 shows a vertical sectional view of another vegetable
compartment and its periphery of a refrigerator in accordance with
the 26th embodiment of the present invention.
[0066] FIG. 40 shows a plan view, cut along line E-E in FIG. 39.
The plan view details the vegetable compartment and its periphery
of the refrigerator in accordance with the 26th embodiment of the
present invention.
[0067] FIG. 41 shows a sectional view of a vegetable compartment
and its periphery of a refrigerator in accordance with a 27th
embodiment of the present invention.
[0068] FIG. 42 shows a sectional view of a refrigerator in
accordance with a 28th embodiment of the present invention, where
the refrigerator is cut vertically and parted to right and
left.
[0069] FIG. 43 shows schematically a cooling cycle of the
refrigerator in accordance with the 28th embodiment.
[0070] FIG. 44 shows a sectional view of an electrostatic atomizing
device and its periphery provided to a vegetable compartment of the
refrigerator in accordance with the 28th embodiment.
[0071] FIG. 45 shows a sectional view of a vegetable compartment
and its periphery of a refrigerator in accordance with a 29th
embodiment.
[0072] FIG. 46 shows a sectional view of an electrostatic atomizing
device and its periphery provided to the vegetable compartment of
the refrigerator in accordance with the 29th embodiment.
[0073] FIG. 47 shows a sectional view of a vegetable compartment
and its periphery of a refrigerator in accordance with a 30th
embodiment.
[0074] FIG. 48 shows a sectional view cut along line A-A in FIG. 2,
and the sectional view details an electrostatic atomizing device
and its periphery of a refrigerator in accordance with a 31st
embodiment of the present invention.
[0075] FIG. 49 shows a perspective view of which part is cut away,
and the perspective view illustrates an indoor unit of an
air-conditioner employing an electrostatic atomizing device in
accordance with a 32nd embodiment of the present invention.
[0076] FIG. 50 shows a sectional view illustrating a structure of
the air conditioner shown in FIG. 49.
[0077] FIG. 51 shows a vertical sectional view of a vegetable
compartment of a conventional refrigerator.
[0078] FIG. 52 shows a perspective view enlarging an essential part
of an ultrasonic mist device provided to a vegetable compartment of
a conventional refrigerator.
DESCRIPTION OF REFERENCE MARKS
[0079] 100 refrigerator [0080] 101 thermally insulated cabinet
[0081] 102 shell [0082] 103 inner wall [0083] 104 refrigerator
compartment [0084] 105 switchable temperature compartment [0085]
106 icemaker [0086] 107 vegetable compartment [0087] 108 freezer
compartment [0088] 109 compressor [0089] 110 cooling compartment
[0090] 111 rear-end partition [0091] 110a recess [0092] 111c
through-section [0093] 112 evaporator [0094] 113 cooling fan [0095]
114 radiant heater [0096] 115 drain pan [0097] 116 drain tube
[0098] 117 evaporation tray [0099] 118 door [0100] 119 lower basket
[0101] 120 upper basket [0102] 122 lid [0103] 123 first partition
[0104] 124 outlet for vegetable compartment [0105] 125 second
partition [0106] 126 inlet for vegetable compartment [0107] 131
electrostatic atomizing device [0108] 132, 209 atomizing port
[0109] 133 voltage applier [0110] 134, 205, 501 heat conducting pin
[0111] 134a, 191 protrusion [0112] 135 atomizing electrode [0113]
136 opposite electrode [0114] 137 outlet wall [0115] 138 humidity
supplying port [0116] 139, 211 mist generation department [0117]
140 inlet air-duct for storage compartment [0118] 141 outlet
air-duct for freezer compartment [0119] 146 controller [0120] 151
surface of rear partition [0121] 152 heat insulator [0122] 154, 178
heater [0123] 155 recess on heat insulator [0124] 156 low
temperature air duct [0125] 158 heat conducting pin heater [0126]
161, 401 partition board [0127] 162 protrusion [0128] 165 through
section [0129] 166 heat conducting pin cover [0130] 167 opening
[0131] 171 heat insulator [0132] 172 partition on freezer side
[0133] 173 partition on vegetable compartment side [0134] 174
partition [0135] 176 mist discharging port [0136] 177 mist air-duct
[0137] 181 inlet air-duct for vegetable compartment [0138] 182
outlet air-duct for vegetable compartment [0139] 183 mist sucking
port [0140] 192 atomizing port [0141] 193 humidity supplying port
[0142] 194 tape (cool air shutout member) [0143] 196 void [0144]
197a, 197b, 197c, 197d void burying member [0145] 200 ultrasonic
mist device [0146] 201 horn-shaped section [0147] 202 electrode
[0148] 202a fixing part on mist-making electrode side [0149] 203
piezoelectric element [0150] 204 electrode [0151] 207 outlet wall
[0152] 208 horn-shaped ultrasonic oscillator [0153] 222 Peltier
module [0154] 222a heat conduction part on air-duct side [0155]
222b heat exchanging part [0156] 251 partition [0157] 252 outlet
air-duct for vegetable compartment [0158] 253 inlet air-duct for
vegetable compartment [0159] 254 vent hole [0160] 255 cooling
air-duct for mist device [0161] 301 temperature changing chamber
[0162] 302 damper [0163] 303 lower temperature side evaporator
[0164] 304 higher temperature side evaporator [0165] 305 first
partition [0166] 306 second partition [0167] 307 condenser [0168]
308 three-way valve [0169] 309 capillary on lower temperature side
[0170] 310 capillary on higher temperature side [0171] 311 cooling
air-duct on temperature changing chamber [0172] 312 cooling
air-duct on freezer compartment [0173] 313 rear-end partition of
temperature changing chamber [0174] 314 rear-end partition of
freezer compartment [0175] 321 partition board [0176] 322 fan for
refrigerator compartment [0177] 323 partition in refrigerator
compartment [0178] 324 air-duct in refrigerator compartment [0179]
325 discharge port from temperature changing chamber [0180] 326
sucking port to temperature changing chamber [0181] 502 tip of the
department mist [0182] 503 water collector [0183] 504-508 channel
[0184] 509 waterway [0185] 510 pump [0186] 512 water [0187] 602a
front sucking port [0188] 602b top sucking port [0189] 604 front
panel [0190] 605 pre-filter [0191] 606 heat exchanger [0192] 608
indoor fan [0193] 610 blowout port
PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION
[0194] Preferred embodiments of the present invention are described
specifically below while referring to the accompanying drawings. It
must be noted, however, that the present invention is not limited
by these preferred embodiments alone.
Preferred Embodiment 1
[0195] FIG. 1 is a longitudinal sectional view showing a section
where a refrigerator in preferred embodiment 1 of the present
invention is cut and parted into right and left sections. FIG. 2 is
a front view of essential parts of a rear end face of a vegetable
compartment of the refrigerator in preferred embodiment 1 of the
present invention. FIG. 3 is a sectional view of a peripheral part
of an electrostatic atomizing device provided in the vegetable
compartment of the refrigerator in preferred embodiment 1 of the
present invention, as seen from an arrow direction of a cut section
along line A-A in FIG. 2.
[0196] In the drawings, thermally insulated cabinet 101, which is a
refrigerator main body of refrigerator 100, includes outer case 102
mainly composed of steel plate, inner case 103 formed of a resin
such as ABS, and a foamed thermally insulating material such as
rigid foamed urethane foamed and filled in a space between outer
case 102 and inner case 103. The inside of refrigerator 100 is
insulated from the surrounding, and is thermally insulated and
divided into a plurality of storage compartments by partitions. In
the highest part of refrigerator 100, refrigerator compartment 104
is arranged as a first storage compartment, and in the lower part
of refrigerator compartment 104, switchable temperature compartment
105 as a fourth storage compartment and icemaker 106 as a fifth
storage compartment are disposed side by side, in the lower part of
switchable temperature compartment 105 and icemaker 106, vegetable
compartment 107 is disposed as a second storage compartment, and in
the lowest part, freezer compartment 108 is disposed as a third
storage compartment.
[0197] Refrigerator compartment 104 is always controlled at a lower
limit of 1.degree. C. to 5.degree. C. so as not to be frozen for
cold storage, and vegetable compartment 107 is controlled same as
in refrigerator compartment 104, or a slightly higher temperature
setting of 2.degree. C. to 7.degree. C. Freezer compartment 108 is
set in a freezing temperature zone, always at -22.degree. C. to
-15.degree. C. for frozen storage, or at a lower temperature of
-30.degree. C. to -25.degree. C. for enhancing the frozen storage
state.
[0198] Switchable temperature compartment 105 can be changed over
in various preset temperature zones from cold storage temperature
zone to frozen storage temperature zone, in addition to the
refrigerator zone of 1.degree. C. to 5.degree. C., the vegetable
zone of 2.degree. C. to 7.degree. C., the freezer zone of
-22.degree. C. to -15.degree. C. Switchable temperature compartment
105 is a storage compartment having an independent door disposed
along with icemaker 106, often provided with a drawer type
door.
[0199] In this preferred embodiment, switchable temperature
compartment 105 is a storage compartment including the temperature
zones from cold storage to frozen storage, but may be used as a
specialized storage compartment only in intermediate temperature
zones between the refrigerator and the freezer, by limiting the
cold storage to refrigerator compartment 104 and vegetable
compartment 107 only, and the frozen storage to freezer compartment
108 only. Or it may be also used as a storage compartment fixed in
a specific temperature zone.
[0200] Icemaker 106 makes ice in an automatic ice making machine
(not shown) provided in the upper part of the compartment from the
water sent from a water tank (not shown) in refrigerator
compartment 104, and stores the ice in an ice container (not shown)
disposed in the lower part of the compartment.
[0201] The ceiling part of thermally insulated cabinet 101 has a
recessed section like stairs toward the rear side of the
refrigerator, and machine room 101a is formed in the stair-like
recess, and machine room 101a accommodates compressor 109, dryer
(not shown) for removing moisture, and other high pressure
component parts of the freezing cycle. That is, machine room 101a
having compressor 109 is disposed by invading into a rear region of
the highest part in refrigerator compartment 104.
[0202] In other words, in the dead space hardly accessible, machine
room 101a having compressor 109 is disposed in the rear region in
the storage compartment of the highest part of thermally insulated
cabinet 101. As a result, the space of the machine room provided
lowest part of thermally insulated cabinet 101 accessible by the
user in a conventional refrigerator can be effectively used
converted to a storage compartment space, and the storage
efficiency and the convenience of use can be notably improved.
[0203] In the preferred embodiment, matters about essential parts
of the present invention mentioned below may be applied to a
conventional refrigerator of general type in which a machine room
is provided in the rear region of the storage compartment in the
lowest part of thermally insulated cabinet 101 and compressor 109
is disposed therein.
[0204] At the back side of vegetable compartment 107 and freezer
compartment 108, cooling compartment 110 for generating cold air is
provided to be partitioned from outlet air-duct 141 for freezer
compartment. Between vegetable compartment 107, freezer compartment
108, and cooling compartment 110, outlet air-duct 141 for freezer
compartment for sending cold air to the thermally insulated
compartments, and rear partition 111 for thermally partitioning
from the storage compartments are disposed. Or, as shown in FIG. 3,
partition board 161 is provided for isolating outlet air-duct 141
for freezer compartment and cooling compartment 110. Evaporator 112
is disposed in cooling compartment 110, and the upper space of
evaporator 112 includes cooling fan 113 for sending the cold air
cooled by evaporator 112 to refrigerator compartment 104,
switchable temperature compartment 105, icemaker 106, vegetable
compartment 107, and freezer compartment 108 by forced convection
system.
[0205] The lower space of evaporator 112 includes radiant heater
114 made of glass tubes for removing frost and ice depositing on
evaporator 112 and its peripheral parts in the cooling mode.
Further in the lower part, drain pan 115 is provided for receiving
the water from the defrosting mode, together with drain tube 116
penetrating from the deepest part to outside of the refrigerator,
and evaporation tray 117 is provided outside of the refrigerator,
at its downstream side.
[0206] Vegetable compartment 107 includes lower basket 119 mounted
on a frame attached to door 118 of vegetable compartment 107, and
upper basket 120 mounted on lower basket 119.
[0207] In the closed state of door 118, mainly, lid 122 for nearly
closing upper basket 120 is held in first partition 123 and inner
case 103 in the upper part of the vegetable compartment. In the
closed state of door 118, lid 122 tightly contacts with the right
and left sides and the inner side of the upper surface of upper
basket 120, and the front side of the upper surface is contacting
almost tightly. The boundary area of right, left and lower sides of
the back side of upper basket 120 and lower basket 119 is narrowed
the gap so as not to allow escape of humidity in the food storage
area as far as not interfering the move of upper basket 120.
[0208] Between lid 122 and first partition 123, as shown in FIG. 2,
there is a passage for cold air discharged from outlet 124 for
vegetable compartment disposed in rear partition 111. A space is
also provided between lower basket 119 and second partition 125,
and a cold air passage is composed. The lower part of rear
partition 111 at the back side of vegetable compartment 107 is
provided with inlet 126 for vegetable compartment returning the
cold air into evaporator 112 after heat exchange by cooling in
vegetable compartment 107.
[0209] In the preferred embodiment, matters about essential parts
of the present invention mentioned below may be applied to a
conventional refrigerator of general type to be opened and closed
by rails provided in the frame attached to the door and the inner
wall. Meanwhile, lid 122, outlet 124 for vegetable compartment,
inlet 126 for vegetable compartment, and the air passage
construction may be optimized by the mode of the storage
container.
[0210] Rear partition 111 is composed, as shown in FIG. 3, of
surface of rear-end partition 151 composed of ABS or other resin,
and heat insulator 152 composed of foamed styrol or the like for
thermally insulating the storage compartments by isolating outlet
air-duct 141 for freezer compartment and cooling compartment 110.
Herein, recess 111a is formed in part of the wall surface of the
inside of the storage compartment of rear partition 111 so as to be
lower in temperature than other parts, and electrostatic atomizing
device 131 is disposed therein.
[0211] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139 and outlet wall 137, and atomizing
port 132 and humidity supplying port 138 are provided in a part of
outlet wall 137. Mist generation department 139 is mainly composed
of atomizing electrode 135 as a tip of the department mist, cooling
pin 134 made of heat conduction material such as aluminum,
stainless steel, or brass, and voltage applicator 133 for applying
a voltage to atomizing electrode 135.
[0212] Atomizing electrode 135 is fixed nearly in the center at one
end of cooling pin 134, and is electrically connected to one end of
a wiring from voltage applicator 133.
[0213] By such configuration, cooling pin 134 is cooled, for
example, by the cold air flowing in outlet air-duct 141 for freezer
compartment in the cooling section, and atomizing electrode 135 is
cooled at the same time.
[0214] Cooling pin 134 is a heat conduction material, which is
formed in a columnar shape, measuring, for example, about 10 mm in
diameter, and about 15 mm in length. As compared with atomizing
electrode 135, measuring about 1 mm in diameter and about 5 mm in
length, the thermal capacity is larger by 50 times or more to 1000
times or less, preferably 100 times or more to 500 times or less.
Thus, the thermal capacity of cooling pin 134 is larger than the
thermal capacity of atomizing electrode 135 by 50 times or more, or
preferably 100 times or more. As a result, the direct effects of
temperature changes in the cooling section on the atomizing
electrode can be substantially lessened, and the mist can be
atomized stably at smaller load fluctuations.
[0215] As the upper limit of the thermal capacity, meanwhile, the
thermal capacity of cooling pin 134 is desired to be 500 times or
less or preferably 1000 times or less of the thermal capacity of
atomizing electrode 135. This upper limit is defined because a
greater energy is needed for cooling if the thermal capacity of
cooling fin 134 is too large, and cooling of cooling pin is
difficult while saving energy. By controlling within the specified
upper limit, if thermal fluctuation loads from the cooling unit are
varied, large effects on atomizing electrode 135 can be alleviated,
and atomizing electrode 135 can be cooled stably by a small
energy.
[0216] Further, by controlling within the specified upper limit,
the time lag required for cooling atomizing electrode 135 by way of
cooling pin 134 can be settled within an appropriate range. It is
therefore effective to prevent delay of cooling of atomizing
electrode 135, that is, start of supply of moisture to
electrostatic atomizing device 131, and atomizing electrode 135 can
be cooled stably and appropriately.
[0217] The material of cooling pin 134 is preferably a heat
conduction material such as aluminum or copper as mentioned above,
and in order to transmit cold heat efficiently from one end to
other end of cooling pin 134, the surrounding is desired to be
covered with heat insulator 152.
[0218] From a long-range view, it is also necessary to maintain
heat conduction of atomizing electrode 135 and cooling pin 134, and
an epoxy member is poured in for preventing invasion of humidity
into the connection area to suppress thermal resistance, and
further atomizing electrode 135 and cooling pin 134 are fixed. Or,
to lower the thermal resistance, atomizing electrode 135 may be
press-fitted and fixed into cooling pin 134.
[0219] Moreover, cooling pin 134 is required to transmit cold heat
within heat insulator 152 in order to insulate thermally vegetable
compartment 107 as storage compartment from evaporator 112 or
outlet air-duct 141 for freezer compartment, and its length is
preferred to be 5 mm or more, preferably 10 mm or more. However, if
the length is more than 30 mm, its effect is lowered.
[0220] Besides, since electrostatic atomizing device 131 installed
in vegetable compartment 107 is exposed to an environment of high
humidity, and its humidity may influence cooling pin 134, cooling
pin 134 is preferably made of a metal material having
corrosion-preventive and rust-preventive properties, or a material
processed by alumite surface treatment or other coating.
[0221] In the preferred embodiment, the shape of cooling pin 134 is
a circular column. Therefore, when fitting into recess 111a of heat
insulator 152, if the fitting dimension is slightly tight,
electrostatic atomizing device 131 can be rotated, and press-fitted
and installed in place. Hence, cooling pin 134 can be installed
without allowing gap. The shape of cooling pin 134 may be a box or
a regular polygon. In the case of a polygon, as compared with a
circular column, it is easier to position, and electrostatic
atomizing device 131 can be disposed at a correct position.
[0222] Further, by mounting atomizing electrode 135 on the central
axis of cooling pin 134, if rotated when fitting cooling pin 134,
the distance between opposite electrode 136 and atomizing electrode
135 can be kept constantly, and a stable discharging distance can
be assured.
[0223] Cooling pin 134 is fixed on outlet wall 137, and cooling pin
134 itself has protrusion 134a projecting from outlet wall 137.
This cooling pin 134 has protrusion 134 at a reverse side of
atomizing electrode 135, and protrusion 134a is fitted into deepest
recess 111b deeper than recess 111a of rear partition 111.
[0224] Hence, at the back side of cooling pin 134, there is deepest
recess 111b deeper than recess 111a. That is, the side of cooling
compartment 110 of heat insulator 152 in deepest recess 11b, that
is, the side of outlet air-duct 141 for freezer compartment is
thinner in heat insulator 152 than in other parts of rear partition
111 at the back side of vegetable compartment 107. This thin heat
insulator 152 is used as a heat cushioning member, and is installed
so that cooling pin 134 may be cooled by the cold air of cooling
compartment 110 from the back side by way of heat insulator
152.
[0225] In the preferred embodiment, as mentioned above, cooling pin
134 as heat conduction material is cooled by the cold air generated
in cooling compartment 110. That is, the cooling source of freezing
cycle is utilized. Since cooling pin 134 is made of a conductive
metal piece, the cooling section is enough to cool for dew
condensation in atomizing electrode 135, only by heat conduction
from outlet air-duct 141 for freezer compartment as air passage for
flow of cold air generated in evaporator 112, so that the dew
condensation can be formed.
[0226] Since the cooling section can be composed in such a simple
structure, mist-making of low trouble rate and high reliability is
realized. In addition, since cooling pin 134 and atomizing
electrode 135 can be cooled by making use of the cooling source of
the freezing cycle, mist-making at low energy is realized.
[0227] At this time, since cooling pin 134 in the preferred
embodiment has protrusion 134a at a reverse side of atomizing
electrode 135, within mist generation department 139, end portion
134b at the protrusion 134a side is closest to the cooling section.
Hence, cooling by cold air of the cooling section is started from
the end portion 134b side remotest from atomizing electrode 135 in
cooling pin 134.
[0228] At a position opposite to atomizing electrode 135,
doughnut-like circular opposite electrode 136 is provided at the
storage compartment (vegetable compartment 107) side, at a specific
distance from the leading end of atomizing electrode 135, and
atomizing port 132 formed on its extension.
[0229] Near mist generation department 139, moreover, voltage
applicator 133 is composed, and the negative potential side of
voltage applicator 133 for generating a high voltage is connected
to atomizing electrode 135, and the positive potential side is
connected to opposite electrode 136, electrically.
[0230] Near atomizing electrode 135, for atomizing mist, discharge
is always occurring. Hence, at the leading end of atomizing
electrode 135, there is a possibility of occurrence of abrasion.
Refrigerator 100 is generally operated continuously for a long
period of more than 10 years, and the surface of atomizing
electrode 135 requires a tough surface treatment, and should be
preferably processed by, for example, nickel plating, gold plating,
or platinum plating.
[0231] Opposite electrode 136 is made of, for example, stainless
steel, and its long-term reliability must be assured. In
particular, to prevent sticking of foreign matter or to prevent
contamination, it is preferred to treat the surface by platinum
plating or the like.
[0232] Voltage applicator 133 is controlled to communicate with
controller 146 of the refrigerator main body, and turns on or off
the high voltage by an input signal from refrigerator 100 or
electrostatic atomizing device 131.
[0233] In this preferred embodiment, voltage applicator 133 is
installed in electrostatic atomizing device 131, and since the
atmosphere in vegetable compartment 107 is low in temperature and
high in humidity, the circuit board surface of voltage applicator
133 is coated with molding material or coating material for
resisting the moisture.
[0234] However, such coating is not necessary if voltage applicator
133 is installed in a place of high temperature outside of storage
compartment.
[0235] Surface of rear-end partition 151 for fixing of
electrostatic atomizing device 131 is provided with heater 154 or
other heating element for regulating the temperature of vegetable
compartment 107 or preventing dew condensation on the surface,
between surface of rear-end partition 151 and heat insulator
152.
[0236] In refrigerator 100 of the preferred embodiment having such
configuration, the operations and actions are explained below.
[0237] First, the operation of the freezing cycle is explained.
Depending on the temperature determined in the refrigerator, the
freezing cycle is started by a signal from the control board (not
shown), and the cooling operation starts. The refrigerant of high
temperature and high pressure discharged by operation of compressor
109 condensed and liquefied somewhat in a condenser (not shown).
Further, by way of refrigerant pipes (not shown) installed on the
side face and back face of thermally insulated cabinet 101 of the
refrigerator main body, and at the front opening of thermally
insulated cabinet 101, the refrigerant is condensed and liquefied
while preventing dew condensation in thermally insulated cabinet
101, and is sent into capillary tubes (not shown). In the capillary
tubes, the refrigerant is decompressed while exchanging heat with a
suction tube (not shown) into compressor 109, and becomes a liquid
refrigerant at low temperature and low pressure, and is sent into
evaporator 112.
[0238] Herein, the liquid refrigerant at low temperature and low
pressure is exchanged in heat with the air in the storage
compartments such as outlet air-duct 141 for freezer compartment
conveyed by operation of cooling fan 113, and the refrigerant in
evaporator 112 is evaporated into gas. At this time, cold air for
cooling the storage compartments in evaporator 110 is generated.
The cold air at low temperature is blown from cooling fan 113, and
is distributed into refrigerator compartment 104, switchable
temperature compartment 105, icemaker 106, vegetable compartment
107, and freezer compartment 108 by way of air ducts and dampers,
and each temperature zone is cooled to each specific temperature.
In particular, vegetable compartment 107 is adjusted within
2.degree. C. to 7.degree. C. by on/off operation of heater 154 or
by distribution of cold air, and is generally not provided a
compartment temperature detector.
[0239] Vegetable compartment 107 is cooled by the cold air after
cooling refrigerator compartment 104 discharged into vegetable
compartment 107 from outlet 124 for vegetable compartment provided
in an intermediate position of inlet air-duct 140 for storage
compartment for circulating the air into evaporator 112. The air
later flows in the outer circumference of upper basket 120 and
lower basket 119 to cool indirectly, and returns again into
evaporator 112 from suction port 126 for vegetable compartment.
[0240] In a part of a position the environment at relatively high
humidity in rear partition 111, heat insulator 152 is thinner in
wall thickness than in other parts, and in particular deepest
recess 111b is formed behind cooling pin 134, and the thickness of
heat insulator is, for example, about 2 mm to 10 mm. In
refrigerator 100 of this preferred embodiment, such thickness
distribution is appropriate for heat cushioning member positioned
between cooling pin 134 and the evaporator. As a result, recess
111a is formed rear partition 111, and electrostatic atomizing
device 131 in a shape projecting in protrusion 134 of cooling pin
134 is inserted and fitted into deepest recess 111b at the remotest
back side of this recess 111a.
[0241] Outlet air-duct 141 for freezer compartment at the back side
of cooling pin 134 is a passage for flow of cold air of about -15
to -25.degree. C. by cooling fan 113, generated by evaporator 112
by the operation of the cooling system. Further, by heat conduction
from the air duct surface, cooling pin 134 is cooled, for example,
to about 0 to -10.degree. C. At this time, since cooling pin 134 is
made of a heat conduction material, cold heat is transmitted
easily, and atomizing electrode 135 at the tip of the department
mist is cooled indirectly through cooling pin 134 to about 0 to
-10.degree. C.
[0242] Herein, the temperature of vegetable compartment 107 is
about 2.degree. C. to 7.degree. C., and the humidity is relatively
high due to transpiration from vegetables, and if atomizing
electrode 135 at the tip of the department mist becomes lower than
the dew point temperature, water is generated in atomizing
electrode 135, including the leading end, and water drops
deposit.
[0243] A negative voltage is applied to atomizing electrode 135
having water drops, and a positive voltage to opposite electrode
136, and a high voltage (for example, 4 to 10 kV) is applied
between these electrodes from voltage applicator 133. At this time,
a corona discharge occurs between these electrodes, and water drops
at the leading end of atomizing electrode 135 are fractioned by an
electrostatic energy. Moreover, since the water drops are charged
electrically, a very fine mist of nano level having an invisible
charge at the level of several nanometers, accompanying ozone and
OH radicals are generated by Rayleigh scattering. The voltage
applied between the electrodes is very high, about 4 to 10 kV, but
the discharge current value at this time is several .mu.A levels,
and the input is very low, about 0.5 to 1.5 W.
[0244] More specifically, supposing atomizing electrode 135 at
reference potential side (0 V) and opposite electrode 136 at high
voltage side (+7 kV), the dew condensation water deposits on the
leading end of atomizing electrode 135, and an air insulation layer
between atomizing electrode 135 and opposite electrode 136 is
destroyed, and discharge is caused by an electrostatic force. At
this time, the dew condensation water is electrically charged, and
fine particles are formed. Further, since opposite electrode 136 is
at a positive side, the charged fine mist is attracted, and liquid
drops are further pulverized. The fine mist of nano level having an
invisible electric charge of several nm level containing radicals
is attracted to opposite electrode 136, and its inertial force
causes the fine mist to be atomized from atomizing electrode 135
toward the storage compartment (vegetable compartment 107).
[0245] If there is no water in atomizing electrode 135, the
discharge distance is remote, and the air insulation layer cannot
be destroyed, and discharge phenomenon does not take place. As a
result, current does not flow between atomizing electrode 135 and
opposite electrode 136.
[0246] Besides, atomizing electrode 135 is not cooled directly, but
cooling pin 134 is cooled, so that atomizing electrode 135 can be
cooled indirectly. Since cooling pin 134 has a larger thermal
capacity than atomizing electrode 135, and direct effects on
atomizing electrode 135 can be lessened, and atomizing electrode
135 can be cooled. Also by playing the role of cold heat reserving,
sudden temperature changes of atomizing electrode 135 can be
suppressed, and mist atomizing of a stable atomizing amount can be
realized.
[0247] Thus, cooling pin 134 is cooled without cooling atomizing
electrode 135 directly, and atomizing electrode 135 can be cooled
indirectly. Since cooling pin 134 as heat conduction material has a
larger thermal capacity than atomizing electrode 135, direct
effects of temperature changes of the cooling section on atomizing
electrode 135 can be alleviated, and atomizing electrode 135 can be
cooled. Therefore, load fluctuations of atomizing electrode 135 can
be suppressed, and mist atomizing of stable atomizing amount can be
realized.
[0248] In this way, opposite electrode 136 is disposed at a
position confronting atomizing electrode 135, and voltage
applicator 133 for generating a high voltage potential difference
is disposed between atomizing electrode 135 and opposite electrode
136, so that an electric field can be stably built up near
atomizing electrode 135. As a result, the pulverization phenomenon
and the atomizing direction are stabilized, and it is effective to
enhance the precision of fine mist atomized into the storage
container formed between lower basket 119 and upper basket 120.
Therefore, the precision of mist generation department 139 can be
enhanced, and electrostatic atomizing device 131 of a high
reliability can be presented.
[0249] Further, cooling pin 134 is cooled by way of heat insulator
152 made of a heat cushioning member, atomizing electrode 135 is
indirectly cooled by way of cooling pin 134, and is further cooled
in a double structure by way of heat insulator 152 made of a heat
cushioning member, so that atomizing electrode 135 is prevented
from being cooled extremely.
[0250] That is, when the temperature of atomizing electrode 135
lowered by 1K, the water making speed at its leading end is raised
by about 10%. However, if atomizing electrode 135 is cooled
extremely, the dew condensation speed is aggressive. As a result,
the atomizing amount increases, and the load of mist generation
department 139 increases. It hence may lead to anticipation of
increase of input into electrostatic mist make 131, and freezing
and mist-making failure of mist generation department 139. However,
since extreme cooling of atomizing electrode 135 is prevented,
troubles due to load increase of mist generation department 139 can
be prevented. Therefore, an appropriate atomizing amount is
assured, and a stable mist atomizing is realized at low input.
[0251] For cooling of cooling pin 134, cold air generated in
cooling compartment 110 is used, and cooling pin 134 is composed of
a heat conductive metal piece. Therefore, the cooling section is
capable of cooling as required only by the heat conduction from
outlet air-duct 141 for freezer compartment as the air duct for
flow of cold air generated in evaporator 112.
[0252] Since the cooling section can be formed in such simple
structure, mist generation department 139 of low trouble rate and
high reliability can be realized. Still more, by making use of the
cooling source of the freezing cycle, cooling pin 134 and atomizing
electrode 135 can be cooled, and mist atomizing is realized at low
energy.
[0253] Thus, end portion 134b at remotest position from atomizing
electrode 135 of cooling pin 134 is cooled. As a result, when
cooling by the cooling section, after cooling a large thermal
capacity of cooling pin 134, atomizing electrode 135 is cooled by
cooling pin 134. Hence, direct effects of temperatures changes in
the cooling section on atomizing electrode 135 are lessened
further, and a stable mist atomizing of smaller load fluctuations
can be realized.
[0254] Rear partition 111 including mist generation department 139
has recess 111a formed in a part of the side of vegetable
compartment 107 as the storage compartment, and mist generation
department 139 having protrusion 134a is inserted into this recess
111a. Accordingly, as a thermal cushioning member, heat insulator
152 composing rear partition 111 of vegetable compartment 107 can
be utilized, and the thickness of heat insulator 152 can be
adjusted without using any particular thermal cushioning member.
Therefore, a thermal cushioning member capable of cooling atomizing
electrode 135 appropriately can be provided, and the structure of
mist generation department 139 can be much simplified.
[0255] Besides, by inserting mist generation department 139 having
protrusion 134a composed of cooling pin 134 into recess 111a, mist
generation department 139 can be securely attached to the partition
wall without allowing looseness. In addition, protrusion to the
side of vegetable compartment 107 as the storage compartment can be
suppressed, and it is hardly accessible by the user's hand, and the
safety is enhanced.
[0256] Mist generation department 139 is not extended to the outer
side across rear partition 111 of vegetable compartment 107, no
adverse effects are given to the sectional area of air duct of
outlet air-duct 141 for freezer compartment, and drop of cooling
capacity due to increase of air duct resistance can be
prevented.
[0257] Recess 111a is formed in a part of vegetable compartment
107, and mist generation department 139 is inserted therein, and
hence the storage capacity of vegetables, fruit and food is not
changed. Cooling pin 134 can be cooled securely, and in other
parts, an enough wall thickness for assuring heat insulation can be
guaranteed. Therefore, dew condensation of outlet wall 137 can be
prevented, and the reliability is enhanced.
[0258] Cooling pin 134 assures a certain level of thermal capacity,
and response of heat conduction from outlet air-duct 141 for
freezer compartment as cooling air duct can be lessened. As a
result, cooling pin 134 can suppress temperature fluctuations of
atomizing electrode 135, and functions as a cold heat reserve
member. Therefore, the time for generation of dew condensation of
atomizing electrode 135 is assured, and freezing can be
prevented.
[0259] Moreover, when cooling pin 134 of heat conduction material
is combined with heat insulator 152, cold heat can be conducted
efficiently without loss. Besides, the heat resistance is
suppressed at the junction of cooling pin 134 and atomizing
electrode 135, and temperature fluctuations of atomizing electrode
135 and cooling pin 134 follow smoothly. At the junction, since
humidity does not invade, and the thermal bond can be favorable
maintained for a long period.
[0260] Vegetable compartment 107 is in the environment of high
humidity, and its humidity may have an adverse effect on cooling
pin 134. In such a case, since cooling pin 134 is made of a metal
material having resistance to corrosion or rusting, or its surface
is treated with alumite or other coating, and rusting is prevented,
and increase of surface thermal resistance is suppressed, and a
stable heat conduction is assured.
[0261] Further, since the surface of atomizing electrode 135 is
plated with nickel, gold or platinum, abrasion due to discharge at
the leading end of atomizing electrode 135 can be suppressed. As a
result, the shape of the leading end of atomizing electrode 135 is
maintained, and atomizing for a longer period is possible, and the
shape of liquid drops at the leading end is stable.
[0262] When a fine mist is atomized from atomizing electrode 135,
an ion wind is generated. At this time, from humidity supplying
port 138 provided in outlet wall 137, as described below, a fresh
air of high humidity flows into atomizing electrode 135 in outlet
wall 137, the mist can be atomized continuously.
[0263] The fine mist generated in atomizing electrode 135 is mainly
atomized into lower basket 119. However, since the mist is formed
of very fine particles, it is high in diffusion, and the fine mist
also reaches up to upper basket 120. The atomized fine mist has
been generated by a high voltage discharge, and the mist is
negatively charged. On the other hand, in vegetable compartment
107, vegetables and fruit are stored, and especially vegetables and
fruit having green leaves are stored, and these vegetables and
fruit are likely to transpire, or to wither due to transpiration
during storage. Some of the vegetables and fruit stored in the
vegetable compartment may be already withered due to transpiration
when returning from shop or during storage, and are positively
charged. Hence, the atomized mist is likely to gather on the
surface of vegetables, and hence the keeping-fresh performance is
enhanced.
[0264] The nano-level fine mist sticking to the vegetable surface
contains OH radicals and traces of ozone, and is effective for
killing germs, resisting germs and removing germs. Still more,
vegetables are encourage to increase in nutrients such as vitamin C
by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0265] Herein, when there is no water in atomizing electrode 135,
the discharge distance becomes longer, and the air insulation lay
cannot be destroyed, and discharge phenomenon does not take place.
As a result, no current flows between atomizing electrode 135 and
opposite electrode 136. This phenomenon can be detected by
controller 146 of refrigerator 100, so that the high pressure
on/off of voltage applicable 133 can be controlled.
[0266] In this preferred embodiment, voltage applicator 133 is
installed at a position of relatively low temperature and high
humidity in vegetable compartment 107. Voltage applicator 133 is
coated with potting material or other coating material to have
moisture-proof and water-proof structure so as to protect the
circuits.
[0267] If voltage applicator 133 is installed outside of the
storage compartment, such treatment is not needed.
[0268] As explained herein, in this preferred embodiment, vegetable
compartment 107 is a thermally insulated storage compartment, and
mist generation department 139 for atomizing a mist is provided in
vegetable compartment 107. Mist generation department 139 includes
atomizing electrode 135 as the tip of the department mist for
atomizing a mist electrically connected to voltage applicator 133
for generating a high voltage, and opposite electrode 136 disposed
at a position opposite to atomizing electrode 135. Cooling pin 134
as heat conduction material is connected to atomizing electrode
135. In order to keep atomizing electrode 135 below the dew point
for condensing dew from the moisture in the air, cooling pin 134 is
cooled by the cooling section. As cooling pin 134 is cooled by the
cooling section, atomizing electrode 135 is indirectly cooled below
the dew point, and dew is condensed from the moisture in the air in
atomizing electrode 135, and a mist is atomized into vegetable
compartment 107.
[0269] As a result, dew can be condensed in atomizing electrode 135
easily and securely form the excessive steam in vegetable
compartment 107. Still more, nano-level fine mist can be generated
by corona discharge of high voltage in relation to opposite
electrode 136. The atomized and atomized fine mist uniformly
deposits on the surface of vegetables and fruit, and transpiration
from vegetables and fruit can be suppressed, and keeping-fresh
performance is enhanced. From the cell gaps and pores on the
surface of vegetables and fruit, moisture permeates into cells and
is supplied into withered cells, and the vegetables may be returned
to a fresh state.
[0270] Moreover, since discharge occurs between atomizing electrode
135 and opposite electrode 136, an electric field is built up
stably, and the atomizing direction is determined, and a fine mist
can be atomized more precisely into the storage container composed
between lower basket 119 and upper basket 120.
[0271] Ozone and OH radicals generated simultaneously with the mist
are also useful for enhancing the effects of deodorizing, removing
of harmful substances on the food surface, and preventing
contamination.
[0272] The atomized mist can be directly applied to the foods in
the storage container of vegetable compartment 107, and the mist
can be adhered to the surface of vegetables by making use of the
potential of the mist and vegetables, and the efficiency of
keeping-fresh performance is enhanced.
[0273] Besides, dew is condensed from the excessive steam in
vegetable compartment 107 by atomizing electrode 135, and water
drops are collected, and a mist is atomized. Hence, it requires no
extra components, such as defrosting hose for supplying water for
mist atomizing, purifying filter, water supply route to be coupled
directly to water service, or water storage tank. Any pump or water
supplying part is not used, and a fine mist can be supplied into
vegetable compartment 107 in a simple structure without requiring
complicated mechanism.
[0274] In this way, and in such a simple structure, a fine mist can
be supplied stably into vegetable compartment 107, and the risk of
troubles of refrigerator 100 can be substantially lowered, and the
reliability is enhanced, and the quality of refrigerator 100 is
improved.
[0275] Instead of tap water, water from dew condensation is used,
and it is free from minerals and impurities, and it is effective to
prevent deterioration when a water retaining material is used or
deterioration of water retaining material due to clogging.
[0276] Further, since mist is not atomized by ultrasonic waves by
ultrasonic vibration, no consideration is necessary about
resonation, noise or vibration by ultrasonic frequency
oscillation.
[0277] Since water tank is not needed, there is no need for water
level sensor for preventing destruction of ultrasonic element due
to shortage of water required when water tank is installed, and a
mist-making device can be installed in the refrigerator in a simple
structure.
[0278] The portion accommodating voltage applicator 133 is buried
in rear partition 111, and is cooled, and the temperature rise of
the circuit board can be suppressed. As a result, temperature
effects in vegetable compartment 107 can be lowered.
[0279] The preferred embodiment includes evaporator 112 for cooling
storage compartments 104, 105, 106, 107, and 108, and rear
partition 111 for thermally isolating cooling compartment 110
having evaporator) 12 and vegetable compartment 107. That is, by
installing a partition in vegetable compartment 107, without
decreasing the storage volume, the safety is enhanced because it is
installed in a deeper position not accessible by the user.
[0280] In the preferred embodiment, cooling pin 134 connected to
atomizing electrode 135 of electrostatic atomizing device 131 is a
heat conductive metal piece. The cooling section for cooling of
cooling pin 134 makes use of heat conduction from outlet air-duct
141 for freezer compartment in which cold air generated in
evaporator 112 flows. Therefore, by adjusting the wall thickness of
heat insulator 152 of rear partition 111 of thermal cushioning
member, the temperature of cooling pin 134 and atomizing electrode
135 can be set easily. Moreover, by enclosing heat insulator 152 as
thermal cushioning member, there is no leak of cold air of low
temperature, and it is effective to prevent drop of reliability due
to causes such as frosting or dew condensation on outlet wall 137
or the like.
[0281] In the preferred embodiment, further, rear partition 111
having mist generation department 139 is provided with recess 111a
in a part of the side of vegetable compartment 107. Herein, cooling
pin 134 connected to atomizing electrode 135 is inserted. Hence,
the storage capacity for storing vegetables, fruit and food is not
changed. In addition, cooling pin 134 can be cooled securely. Other
parts than atomizing electrode 135 or cooling pin 134 of
electrostatic atomizing device 131 are formed in an enough wall
thickness to assure heat insulation for preventing dew condensation
in outlet wall 137, and the reliability is enhanced.
[0282] In electrostatic atomizing device 131 of the preferred
embodiment, since a high voltage is applied between atomizing
electrode 135 and opposite electrode 136, ozone is also generated
when forming a fine mist. However, by on/off operation control of
electrostatic atomizing device 131, the ozone concentration in
vegetable compartment 107 can be adjusted. By appropriately
adjusting the ozone concentration, yellowing or deterioration of
vegetables due to excessive ozone can be prevented, and the
bactericidal and antibacterial action on the vegetable surface can
be enhanced.
[0283] Also in the preferred embodiment, atomizing electrode 135 is
set at reference potential side (0 V), and a positive potential (+7
V) is applied to opposite electrode 136, and a high voltage
potential difference is caused between the two electrodes.
Alternatively, a high voltage potential difference may be caused
between the two electrodes by setting opposite electrode 136 at
reference potential side (0 V) and applying a negative potential
(-7 V) to atomizing electrode 135. In this case, opposite electrode
136 closer to vegetable compartment 107 is at the reference voltage
side, and electric shock does not take place if the hand of the
user of the refrigerator is brought loser to opposite electrode
136. When atomizing electrode 135 is set at a negative potential of
-7 V, when the side of vegetable compartment 107 is set at the
reference potential side, opposite electrode 136 may not be
particularly required.
[0284] In this case, for example, a conductive storage container is
provided within insulated vegetable compartment 107, and further
the holding member for holding the storage container is also made
of a conductive material. This conductive storage container is
electrically connected to the conductive holding member, and is
detachable from the conductive member, so that the holding member
may be connected to the reference potential part and may be
grounded (0 V).
[0285] As a result, a potential difference is always kept between
mist generation department 139 and the storage container and the
holding member, and a stable electric field is composed. Therefore,
a mist is stably atomized from mist generation department 139.
Besides, since the entire storage container is at the reference
potential, it is possible to diffuse the atomized mist uniformly in
the entire storage container. It is also effective to prevent
charging into peripheral objects.
[0286] Thus, if opposite electrode 136 is not provided
particularly, only by forming a grounded holding member in a part
of the side of vegetable compartment 107, a potential difference
from atomizing electrode 135 can be generated, and a mist can be
atomized. Hence, in a simpler structure, a stable electric field
can be composed, and the mist can be atomized more stably from mist
generation department 139.
[0287] Moreover, when a holding member is disposed at the storage
container side, since the entire storage container is at a
reference potential, the atomized mist can be diffused into the
entire storage container. It is also effective to prevent charging
into peripheral objects.
[0288] In the preferred embodiment, the air duct for cooling pin
134 is outlet air-duct 141 for freezer compartment, but it is also
possible to make use of the discharging air duct from icemaker 106
or inlet air-duct 140 for storage compartment. Hence, electrostatic
atomizing device 131 may be installed anywhere.
[0289] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 is the cold air cooled by using the cooling
source generated in the freezing cycle of refrigerator 100, but it
is also possible to use the cold air from the cooling source of
refrigerator 100, or heat conduction from the cooling pipe using
the cold air. Hence, by regulating the temperature of this cooling
tube, it is possible to cool the heat conduction material of
cooling pin 134 at a desired temperature, and it is easier to
manage the temperature when cooling atomizing electrode 135.
[0290] In the preferred embodiment, water retaining member is not
installed around atomizing electrode 135 of electrostatic atomizing
device 131, but a water retaining member may be installed. As a
result, the dew condensation water generated near atomizing
electrode 135 can be held around atomizing electrode 135, and can
be appropriately supplied to atomizing electrode 135.
[0291] In the preferred embodiment, the storage compartment for
atomizing a mist in mist generation department 139 is vegetable
compartment 107, but other storage compartments in other
temperature zones may be used such as refrigerator compartment 104
or switchable temperature compartment 105, and it is possible to
develop into various applications.
Preferred Embodiment 2
[0292] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 2 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 2 of the present invention is same as FIG. 2. FIG. 4
shows a sectional view cut along line A-A in FIG. 2, illustrating
an electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment 2
of the present invention.
[0293] In the drawings, rear partition 111 is composed of surface
of rear-end partition 151 made of ABS or other resin, and heat
insulator 152 isolating the storage compartment from
low-temperature air duct 156 or cooling compartment 110, and made
of foamed styrol or the like for thermally insulating the storage
chamber. In a part of the wall of the inside of the storage
compartment of rear partition 111, recess 111a is formed to be
lower in temperature than in other positions, and electrostatic
miser maker 131 disposed on through-section 111c formed in a recess
provided at the evaporator 112 side of the place of installation of
cooling pin 134.
[0294] At this time, a part of cooling pin 134 made of heat
conduction material penetrates through heat insulator 152, and is
exposed in a part of low-temperature air duct 156. Low-temperature
air duct 156 has a protrusion formed near the back side of cooling
pin 134, that is, recess 155 on heat insulator is composed, and the
air duct is expanded in part.
[0295] In refrigerator 100 having such configuration, the operation
and actions are explained below.
[0296] In a part of the position exposed to a relatively high
humidity environment in rear partition 111, heat insulator 152 is
thinner in wall thickness than in other positions, and, in
particular the thickness of heat insulator 152 behind cooling pin
134 is about 2 mm to 10 mm. Hence, through-section 111c is formed
in rear partition 111, and electrostatic atomizing device 131 is
provided in this place.
[0297] Cooling pin 134 is partly exposed in low-temperature air
duct 156 at the back side. By the operation of the cooling system,
cold air is generated in evaporator 112, and cold air of lower
temperature than the vegetable compartment temperature flows from
cooling fan 113, and cooling pin 134 is cooled to about, for
example, 0 to -10.degree. C. At this time, since cooling pin 134 is
made of a heat conduction material, cold heat transmitted very
quickly, and atomizing electrode 135 at the tip of the department
mist is cooled to about 0 to -10.degree. C.
[0298] As a result, the vicinity of recess 155 on heat insulator of
low-temperature air duct 156 is expanded, and the air duct
resistance is lowered. Hence, the air flow rate of cooling fan 113
is increased, and the cooling system efficiency is enhanced.
[0299] A high voltage (for example, 4 to 10 kV) is applied between
two electrodes, that is, atomizing electrode 135 having water drops
at negative voltage side, and opposite electrode 136 at positive
electrode side, from voltage applicator 133. At this time, a corona
discharge takes place between the two electrodes, and water drops
at the leading end of atomizing electrode 135 are pulverized by an
electrostatic energy. Further, since the liquid drops are
electrically charged, by Rayleigh scattering, electrically charged
invisible nano-level fine mist of several nm units, and ozone and
OH radical are generated at the same time. The voltage applied
between the electrodes is very high, about 4 to 10 kV, but the
discharge current value at this time is several .mu.A levels, and
the input is very low, about 0.5 to 1.5 W.
[0300] The generated fine mist is atomized into lower basket 119,
and is very fine in particle size, and is hence strong in
diffusion, and the fine mist easily reaches up to upper basket 120.
Since the atomized fine mist is generated by high voltage
discharge, it is charged negatively.
[0301] On the other hand, vegetable compartment 107 contains green
and leafy plants among vegetables and fruit, and these vegetables
and fruit are likely to transpire or wither due to transpiration
during storage. Some of the vegetables and fruit stored in the
vegetable compartment may be already withered due to transpiration
when returning from shop or during storage, and are positively
charged. Hence, the atomized mist is likely to gather on the
surface of vegetables, and hence the keeping-fresh performance is
enhanced.
[0302] The nano-level fine mist sticking to the vegetable surface
contains OH radicals and traces of ozone, and is effective for
killing germs, resisting germs and removing germs, and still more,
vegetables are encouraged to increase in nutrients such as vitamin
C by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0303] Herein, in the preferred embodiment, the back side of rear
partition 111 for thermally isolating evaporator 112 and vegetable
compartment 107 as a storage compartment is provided with at least
one air duct (low-temperature air duct 156) for conveying cold air
to the storage compartment or evaporator 112, and heat insulator
152 thermally insulated from storage chamber or other air duct to
avoid thermal effects. The heat conduction material for cooling
atomizing electrode 135 of atomizing electrode 139 of electrostatic
atomizing device 131, and condensing dew is cooling pin 134 made of
a thermally conductive metal piece connected to atomizing electrode
135. The cooling section for cooling of cooling pin 134 is cold air
generated in evaporator 112. Hence, atomizing electrode 135 can be
cooled securely. Besides, since any particular new cooling section
is not used, the structure can be composed easily and
inexpensively.
[0304] In the preferred embodiment, rear partition 111 having mist
generation department 139 is provided with recess 11a in a part of
the vegetable compartment 107 side. By recess 155 on heat
insulator, through-section 111c communicating with recess 111a is
formed in rear partition 111. Cooling pin 134 of heat conduction
material is inserted in this through-section 111c, and thereby
atomizing electrode 139 is formed in rear partition 111.
[0305] Cooling pin 134 is inserted in through-section 111c, and a
part of cooling pin 134 penetrates through heat insulator 152, and
is exposed in a part of low-temperature air duct 156. Therefore,
cooling pin 134 made of a metal piece can be cooled securely.
Recess 155 on heat insulator is formed in low-temperature air duct
156, and the air duct sectional area of low-temperature air duct
156 is widened. As a result, the air duct resistance is decreased
or becomes equal, and decline of cooling capacity can be prevented.
Also by adjusting the exposed surface area of cooling pin 134 to
low-temperature air duct 156, the temperature of atomizing
electrode 135 can be adjusted easily.
Preferred Embodiment 3
[0306] FIG. 5 is a longitudinal sectional view of essential parts
showing a section where the periphery of the door side of the
partition wall of the upper part of the vegetable compartment of
the refrigerator of preferred embodiment 3 of the present invention
is divided and parted into right and left sections.
[0307] As shown in the drawing, electrostatic atomizing device 131
is assembled into first partition wall 123 thermally isolating the
temperature zones of vegetable compartment 107 and icemaker 106. In
particular, cooling pin 134 of mist generation department 139 is
formed in a concave shape in the thermally insulating material for
composing first partition 123.
[0308] Thermally insulated cabinet 101, that is, the refrigerator
main body of refrigerator 100 of the preferred embodiment has a
plurality of storage compartments. The ceiling side of vegetable
compartment 107 having mist generation department 139 is provided
with icemaker 106 which is a low-temperature storage compartment
kept at lower temperature than vegetable compartment 107 having
mist generation department 139. Mist generation department 139 is
installed in first partition 123 at the ceiling side of vegetable
compartment 107. First partition 123 has recess 123a at the
vegetable compartment 107 side, and cooling pin 134 of heat
conduction material is inserted in recess 123a.
[0309] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0310] The thickness of first partition 123 having mist generation
department 139 of electrostatic atomizing device 131 is required to
guarantee a sufficient cooling capacity for cooling of cooling pin
134 in which atomizing electrode 135 is fixed. Therefore, the wall
thickness of the position of installation of electrostatic
atomizing device 131 is formed thinner than in other parts. As a
result, by heat conduction from icemaker 106 at a relatively lower
temperature than vegetable compartment 107, cooling pin 134 can be
cooled, and atomizing electrode 135 can be cooled. Herein, if the
leading end temperature of atomizing electrode 135 is set below the
dew point, the steam near atomizing electrode 135 condenses dew in
atomizing electrode 135, and water drops are formed securely.
[0311] Although not shown, by installing a compartment temperature
detector, a compartment humidity detector, a atomizing electrode
temperature detector, or a humidity detector in the compartment,
the dew point can be calculated precisely depending on the
compartment environment changes according to a predetermined
calculation formula.
[0312] A high voltage (for example, 7.5 kV) is applied between two
electrodes, that is, atomizing electrode 135 at negative voltage
side, and opposite electrode 136 at positive electrode side, from
voltage applicator 133. At this time, the air insulation layer is
broken between the electrodes, and a corona discharge takes place,
and water on atomizing electrode 135 is atomized from the leading
end of the electrode, and electrically charged invisible nano-level
fine mist of less than one micrometer is generated, together with
accompanying ozone and OH radical.
[0313] The generated fine mist is atomized into the vegetable
compartment (lower basket 119, upper basket 120). The fine mist
atomized from electrostatic atomizing device 131 is charged
negatively. On the other hand, vegetable compartment 107 contains
vegetables and fruit, including green and leafy plants and fruit.
Some of the vegetables and fruit stored in the vegetable
compartment may be already withered due to transpiration when
returning from shop or during storage. These vegetables and fruit
are usually positively charged, and the atomized fine mist charged
negatively is likely to gather on the surface of vegetables.
[0314] When the humidity in vegetable compartment 107 is raised
again, the atomized fine mist deposits simultaneously on the
surface of vegetables, and transpiration from vegetables and fruit
is suppressed, and the keeping-fresh performance is enhanced. The
moisture permeates into the tissues from gaps among cells in the
vegetables and fruit, and transpires, and water is supplied again
into the withered cells, and the cells are swollen, stretched and
refreshed.
[0315] The generated fine mist holds ozone and OH radicals, and
they have a strong oxidation power. Accordingly, the generated fine
mist can deodorize vegetable compartment 107, and sterilize and
bactericide the vegetable surface, and can also oxidize, decompose,
and remove agricultural chemicals, wax, and other harmful
substances sticking to the vegetable surface.
[0316] At the present, the refrigerant used in the freezing cycle
is mainly isobutane which is lower in global warming factor from
the viewpoint of preservation of the global environment.
[0317] Isobutane is a hydrocarbon, and as compared with air, its
specific gravity is about 2 times at ordinary temperature and
atmospheric pressure (300K, 2.04).
[0318] If isobutane leaks from the freezing system while compressor
109 is stopped, since it is heavier than air, it leaks downward. At
this time, the refrigerant may leak into the compartment by way of
rear partition 111. In particular, when leaking from evaporator 112
large in the staying amount of the refrigerant, the leak amount may
be large, but vegetable compartment 107 incorporating electrostatic
atomizing device 131 is disposed above evaporator 112, the leaking
refrigerant will not get into vegetable compartment 107.
[0319] If isobutane leaks into vegetable compartment 107 from
evaporator 112, since isobutane is heavier than air, it is
collected in the lower part of the storage compartment (vegetable
compartment 107). Hence, since electrostatic atomizing device 131
is installed in the ceiling of the storage compartment (vegetable
compartment 107), and the possibility of staying at high
concentration near electrostatic atomizing device 131 is very
low.
[0320] Thus, in the preferred embodiment, the refrigerator main
body, that is, thermally insulated cabinet 101 has a plurality of
storage compartments. The ceiling side of vegetable compartment
107, which is a storage compartment having mist generation
department 139, is provided with icemaker 106 which is a
low-temperature storage compartment kept at lower temperature than
vegetable compartment 107, which is a storage compartment having
mist generation department 139. Mist generation department 139 is
provided in first partition 123 at the ceiling side of vegetable
compartment 107.
[0321] If a storage compartment in freezing temperature zone such
as refrigerator compartment or icemaker in provided in the upper
part of vegetable compartment 107 having mist generation department
139 (that is, icemaker 106 in this preferred embodiment), mist
generation department 139 is installed in first partition 123 on
the ceiling for partitioning them. As a result, by the cold air
from icemaker 106 in the upper part of vegetable compartment 107,
cooling pin 134 made of heat conduction material in mist generation
department 139 can be cooled. Hence, atomizing electrode 135 is
cooled, and dew can be condensed. Therefore, any particular cooling
device is not needed, and a mist generation department can be
composed in a simple structure, and a mist generation department of
low trouble rate and high reliability can be realized.
[0322] Refrigerator 100 of the preferred embodiment includes first
partition 123 for partitioning vegetable compartment 107, and
icemaker 106 which is a storage compartment of lower temperature
than vegetable compartment 107 at the ceiling side of vegetable
compartment 107. Electrostatic atomizing device 131 is attached to
first partition 123 at the ceiling side of vegetable compartment
107.
[0323] If the freezer compartment, icemaker 106, or other storage
compartment in freezing temperature zone is installed in the upper
part of the storage compartment having electrostatic atomizing
device 131, cooling pin 134 of heat conduction material is
installed in first partition 123 on the ceiling partitioning them.
As a result, dew can be condensed by cooling atomizing electrode
135 by way of cooling pin 134 by the cooling source in freezing
temperature zone such as freezer compartment or icemaker 106, and
any particular cooling device is not needed. Besides, since the
mist can be atomized from the ceiling, it is easily diffused into
the entire storage container composed of lower basket 119 and upper
basket 120, and it is free from contact with part of body of the
user, and the safety is enhanced.
[0324] Mist generation department 139 of the preferred embodiment
is designed to generate mist by an electrostatic mist making
system, and water drops are broken and pulverized by high voltage
or other electric energy, and a fine mist is generated. Since the
generated mist is electrically charged, and the mist is charged in
opposite polarity to the desired object such as vegetables and
fruit. For example, by atomizing a negatively charge mist to the
positively charged vegetables and fruit, the bonding force on the
vegetables and fruit, and the mist is deposited more uniformly on
the vegetable surface. At the same time, as compared with the mist
not charged electrically, the mist bonding rate is enhanced. The
atomized fine mist is directly applied into the vegetable
container, and the fine mist can be deposited on the vegetable
surface by making use of the potential of the fine mist and the
vegetables, and the freshness can be kept more efficiently.
[0325] Besides, the replenish water used in the preferred
embodiment is not tap water supplied from outside, but is water
from dew condensation. It is free from minerals and impurities, and
deterioration of water due to clogging at the leading end of
atomizing electrode can be prevented.
[0326] The mist in the preferred embodiment contains radicals, and
the agricultural chemicals and wax sticking to the vegetable
surface can be decomposed and removed by a very small amount of
water, and the water is saved, and a low input is realized.
[0327] Since electronic mist maker 131 is installed above the
evaporator (evaporator 112), if the freezing cycle is composed by
using isobutane or propane, or if the refrigerant leaks, since the
refrigerant is heavier than air, vegetable compartment 107 is not
contaminated, and it is very safe.
[0328] In vegetable compartment 107, too, since mist generation
department 139 is disposed above vegetable compartment 107, if the
refrigerant leaks from the refrigerant piping in the refrigerator
main body or the like, it stays in the lower part of vegetable
compartment 107, and there is no problem.
[0329] Since no part of vegetable compartment 107 contacts directly
with the refrigerant piping or the like, and the refrigerant does
not leak directly from the refrigerant piping.
Preferred Embodiment 4
[0330] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 4 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 4 of the present invention is same as FIG. 2. FIG. 6
shows a sectional view cut along line A-A in FIG. 2 as seen from
the arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment 4
of the present invention.
[0331] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 3 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
3 or applicable to the same technical concept are omitted in
explanation.
[0332] In the drawing, rear partition 111 has surface of rear-end
partition 151 as a partition for isolating vegetable compartment
107 as a storage compartment composed of ABS or other resin.
Further, rear partition 111 has also outlet air-duct 141 for
freezer compartment for passing cold air for cooling other storage
compartment of freezer compartment 108 and heat insulator 152 for
thermally isolating from the storage compartment. It also has
partition board 161 for isolating outlet air-duct 141 for freezer
compartment and cooling compartment 110. Between surface of
rear-end partition 151 at the vegetable compartment 107 side and
discharge air duct 141 from freezer compartment, heat insulator 152
made of foamed styrol for keeping heat insulation is formed.
Between surface of rear-end partition 151 and heat insulator 152,
heater 154 or other heating device is provided for regulating the
temperature of vegetable compartment 107 for preventing dew
condensation on the surface.
[0333] Herein, recess 111a is provided in a part of the wall
surface at the inside of the storage compartment of rear partition
111, electrostatic atomizing device 131 is buried in this
place.
[0334] Electrostatic atomizing device 131 atomizes a mist of dew
condensation water generated in atomizing electrode 135 from the
moisture in the air around mist generation department 139 by
cooling mist generation department 135 provided in mist generation
department 139 lower than the dew point temperature by the
evaporator.
[0335] A this time of dew condensation, in the preferred
embodiment, the low-temperature air flowing in outlet air-duct 141
for freezer compartment is used as the evaporator, and atomizing
electrode 135 is not cooled directly, but atomizing electrode 135
is cooled by way of cooling pin 134 of heat conduction material
having a larger thermal capacity than atomizing electrode 135.
[0336] The back side of cooling pin 134 of heat conduction
material, that is, heat insulator 152 at the cooling compartment
110 side is desired to be formed thinly in order to cooling pin 134
of heat conduction material (as explained in FIG. 3 relating to
preferred embodiment 1). However, when molding from foamed styrol
or the like, if an extremely thin portion is formed, the rigidity
of the thin portion is lowered, and defects such as crack or hole
may be formed due to lack of strength or defective molding, and the
quality deterioration may occur.
[0337] In the preferred embodiment, protrusion 162 is provided in
heat insulator 152 near the back side of cooling pin 134. As a
result, as compared with the flat portion, the periphery of cooling
pin 134 is heightened in rigidity, and the wall thickness of heat
insulator 152 is increased, and the rigidity is enhanced. Moreover,
by protrusion 162, cooling pin 134 can be cooled from both the
lateral side and the back side.
[0338] Further, in order to suppress increase of air duct passage,
the outer circumference of protrusion 162 is formed in a conical
slope so as to be thinner as going toward the leading end
[0339] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0340] Cooling pin 134 of heat conduction material is cooled by way
of heat insulator 152 of heat cushioning material. Therefore, mist
generation department 135 is cooled indirectly by way of cooling
pin 134, and is also cooled indirectly in a dual structure by way
of heat insulator 152 of heat cushioning material. Accordingly,
mist generation department 135 is not cooled extremely. If mist
generation department 135 is cooled extremely, the dew condensation
amount in mist generation department 139 is increased, and the load
is increased in mist-making, and the input to electrostatic
atomizing device 131 increases, and mist generation department 139
may be frozen, and mist-making failure may occur. In this preferred
embodiment, however, defects by such increase of load in mist
generation department 139 can be prevented, and an appropriate dew
condensation amount is maintained, and stable mist atomizing is
realized at low cost.
[0341] Atomizing electrode 135 is cooled indirectly in a dual
structure by way of cooling pin 134 of heat conduction material and
heat insulator 152 of heat cushioning material, and direct effects
of temperature changes of cooling section (low-temperature air
flowing in outlet air-duct 141 for freezer compartment) on mist
generation department 135 can be lessened. Therefore, load
fluctuations of mist generation department 135 can be suppressed,
and mist atomizing of a stable mist amount is realized.
[0342] Since cooling pin 134 is cooled by the cold air generated in
cooling compartment 110, and cooling pin 134 is formed of a metal
piece of excellent heat conduction, the cooling section can cool as
required only by the heat conduction from the air duct of flow of
cold air generated in evaporator 112.
[0343] At this time, cooling pin 134 in this preferred embodiment
has protrusion 134a formed at the reverse side of mist generation
department 135. Therefore, in mist generation department 139, end
portion 134b at the protrusion 134 side is closest to the cooling
section. Accordingly, cooling pin 134 is cooled from the end
portion 134b side remotest from mist generation department 135 by
the cold air from the cooling section.
[0344] Thus, in the portion exposed to vegetable compartment 107,
only mist generation department 135 is cooled by heat conduction,
and dew is condensed and mist is formed in mist generation
department 135. Other positions are thermally insulated, and dew
condensation on, for example, outlet wall 137 can be prevented.
[0345] Between electrostatic atomizing device 131 and outlet
air-duct 141 for freezer compartment, there is no communicating
part, and low-temperature air does not leak into the compartment.
Therefore, dew condensation or other low temperature abnormality
will not occur in vegetable compartment 107 and peripheral
parts.
[0346] Since the cooling section is formed in a simple structure,
mist generation department 139 of low trouble rate and high
reliability is realized. In addition, since cooling pin 134 and
atomizing electrode 135 can be cooled by making use of the cooling
source of the freezing cycle, mist can be formed at low energy.
[0347] Rear partition 111 having mist generation department 139 has
recess 111a formed in a part of the vegetable compartment side 107,
and mist generation department 139 having protrusion 134a is
inserted into this recess 111a. Hence, heat insulator 152 for
composing rear partition 111 of vegetable compartment 107 can be
used as heat cushioning material. Therefore, without requiring any
particular heat cushioning material, only by adjusting the
thickness of heat insulator 152, and by such heat cushioning
material, atomizing electrode 135 can be properly cooled, and mist
generation department 139 may be formed in a simpler structure.
[0348] In outlet air-duct 141 for freezer compartment provided at
the back side of rear partition 111, protrusion 162 of a partially
conical shape is formed of heat insulator 152. This protrusion 162
is formed in a small slope not resisting the cold air flow
direction, and deterioration of cooling capacity is prevented. At
the same time, since the heat conduction area for cooling pin 134
is increased, and the cooling efficiency of cooling pin 134 is
enhanced.
[0349] Thus, in the preferred embodiment, heat insulator 152 of
rear partition 111 near the back side of cooling pin 134 is
provided with protrusion 162 projecting into outlet air-duct 141
for freezer compartment. Hence. as compared with the case of
forming a flat lane at the cooling pin 134 side in outlet air-duct
141 for freezer compartment without forming protrusion 162 in
outlet air-duct 141 for freezer compartment, the rigidity around
cooling pin 134 is enhanced, and a sufficient wall thickness of
heat insulator 152 is maintained, and if the rigidity is further
heightened, cooling pin 134 of heat conduction material can be
cooled from both the lateral side and the back side. Therefore, the
surface area for heat conduction can be increased, and the rigidity
around cooling pin 134 can be enhanced without lowering the cooling
efficiency of cooling pin 134 of heat conduction material.
[0350] Besides, by forming the outer circumference of protrusion
162 in a conical slope becoming thinner as going toward the leading
end, the cold air flows while crawling along the outer
circumference of protrusion 162 having a curved surface to the cold
air flowing direction, and increase of air duct resistance is
suppressed. At the same time, since cooling pin 134 is cooled
uniformly from the outer circumference of the peripheral wall,
cooling pin 134 of heat conduction material can be cooled
uniformly. Therefore, atomizing electrode 135 can be cooled
efficiently by way of cooling pin 134.
[0351] Cooling pin 134 can reserve a certain extent of thermal
capacity, and can relax the response of thermal conduction from in
outlet air-duct 141 for freezer compartment. It is therefore
possible to suppress the temperature fluctuations of atomizing
electrode 135. Cooling pin 134 also has a cold heat reserve
function, and the dew condensation time of atomizing electrode 135
is assured, and freezing can be prevented.
[0352] Since the mist making device is electrostatic atomizing
device 131, the generated fine mist is very small in particle size,
and is strong in diffusion property, reaches into the entire space
of vegetable compartment 107 to be atomized. The atomized fine mist
is generated by high voltage discharge, and is charged negatively.
Since vegetable compartment 107 contains positively charged
vegetables and fruit, the atomized mist is likely to deposit on the
surface of vegetables, and the humidity on the surface of
vegetables rises up, and the moisture can be permeated into the
cells from the surface, so that the freshness may be enhanced.
[0353] The nano-level mist sticking to the surface of vegetables
contains OH radicals and traces of ozone. It is effective for
killing germs, resisting germs and removing germs, and still more,
vegetables are encouraged to increase in nutrients such as vitamin
C by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0354] If there is no water in atomizing electrode 135, the
discharge distance becomes longer, and the insulation layer of air
cannot be broken, and discharge phenomenon does not take place. As
a result, no current flows between atomizing electrode 135 and
opposite electrode 136. This phenomenon is detected by controller
146 of refrigerator 100, and the high voltage of voltage applicator
133 can be turned on and off, so that the thermal load into the
compartment is suppressed, while energy is saved.
[0355] Thus, in the preferred embodiment, conical protrusion 162
projecting into outlet air-duct 141 for freezer compartment is
provided in heat insulator 152 at the back side of cooling pin 134
as protrusion 134a of mist generation department 139. Hence, by
enhancing the rigidity of heat insulator 152, parting of heat
insulator 152 may be easier. Further, by minimizing the passage
resistance of outlet air-duct 141 for freezer compartment, the
cooling capacity into cooling pin 134 can be maintained.
[0356] In the preferred embodiment, by securely assuring the wall
thickness of heat insulator 152, there is no leak of cold air
between vegetable compartment 107 and adjacent section of outlet
air-duct 141 for freezer compartment, and frosting or dew
condensation of outlet wall 137 can be prevented.
[0357] In the preferred embodiment, outlet air-duct 141 for freezer
compartment is the air duct as cooling section for cooling of
cooling pin 134, but the same role may be played by other
low-temperature air passage such as discharging air duct of
icemaker 106, or return air passage of freezer compartment 108. Not
limited to the air passage, the cold air from storage compartment
of lower temperature than vegetable compartment 107 may be used. As
a result, the possible location for installing electrostatic
atomizing device 131 is extended.
[0358] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 is the cold air cooled by using the cooling
source generated in the freezing cycle of the refrigerator, but it
may be also possible to use the heat conduction from the cooling
tube making use of cold air or low temperature from the cooling
source of the refrigerator. As a result, by adjusting the
temperature of the cooling tube, cooling pin 134 may be cooled to a
desired temperature, and it is easy to manage the temperature when
cooling atomizing electrode 135.
[0359] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 is the low-temperature air, but may be realized
by an auxiliary component such as Peltier element making use of
Peltier effect. In this case, by supply voltage to the Peltier
element, the temperature at the leading end of atomizing electrode
135 may be controlled at a very delicate temperature.
[0360] In the preferred embodiment, buffer material is not used
between outlet wall 137 of electrostatic atomizing device 131 and
recess 111a of heat insulator 152. However, to prevent invasion of
humidity into cooling pin 134 or prevent loosening, it is preferred
to form urethane foam or other cushioning material between outlet
wall 137 of electrostatic atomizing device 131 and recess 111a of
heat insulator 152. As a result, invasion of humidity into cooling
pin 134 can be prevented, and dew condensation on heat insulator
152 can be prevented.
[0361] In the preferred embodiment, a water retaining member may be
disposed around atomizing electrode 135. As a result, dew
condensation water generated near atomizing electrode 135 may be
maintained near atomizing electrode 135, and may be properly
supplied to atomizing electrode 135. Moreover, by providing
vegetable compartment 107 with water retaining member or closing
mean, a high humidity may be maintained.
[0362] In the preferred embodiment, vegetable compartment 107 is
used as the storage compartment for atomizing mist in mist
generation department 139, but it may be replaced by storage
compartment of other temperature zone such as refrigerator
compartment 104 or switchable temperature compartment 105, and
various applications can be extended in this case.
Preferred Embodiment 5
[0363] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 5 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 5 of the present invention is same as FIG. 2. FIG. 7
shows a sectional view cut along line A-A in FIG. 2 as seen from
the arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment 5
of the present invention.
[0364] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 4 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
4 or applicable to the same technical concept are omitted in
explanation.
[0365] In the drawing, rear partition 111 has surface of rear-end
partition 151 composed of ABS or other resin. Further, rear
partition 111 has also heat insulator 152 composed of foamed styrol
or the like for thermally isolating between surface of rear-end
partition 151 and outlet air-duct 141 for freezer compartment. It
also has partition board 161 for isolating between outlet air-duct
141 for freezer compartment and cooling compartment 110. Between
surface of rear-end partition 151 at the vegetable compartment 107
side and heat insulator 152, heater 154 or other heating device is
provided for regulating the temperature of vegetable compartment
107, or preventing dew condensation on the surface.
[0366] Herein, through-section 165 is provided in a part of the
wall at the inside of vegetable compartment 107 of rear partition
111, and electrostatic atomizing device 131 is installed at this
position.
[0367] Electrostatic atomizing device 131 atomizes a mist of dew
condensation water generated in atomizing electrode 135 from the
moisture in the air around mist generation department 139 by
cooling mist generation department 135 provided in mist generation
department 139 lower than the dew point temperature by the
evaporator.
[0368] At this time of dew condensation, in the preferred
embodiment, the low-temperature air flowing in outlet air-duct 141
for freezer compartment is used as the evaporator. Atomizing
electrode 135 is not cooled directly, but atomizing electrode 135
is cooled by way of cooling pin 134 having a larger thermal
capacity than atomizing electrode 135.
[0369] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139, voltage applicator 133, and outlet
wall 137, and a part of outlet wall 137 includes atomizing port 132
and humidity supplying port 138. Atomizing electrode 135 is
provided in mist generation department 139, and atomizing electrode
135 is connected and fixed to cooling pin 134 of heat conduction
material such as aluminum or stainless steel. It is also connected
electrically to one end wired from voltage applicator 133.
[0370] Cooling pin 134 of heat conduction material has a large
thermal capacity, 50 times or more to 1000 times or less,
preferably 100 times or more to 500 times or less, as compared with
atomizing electrode 135 at the tip of the department mist. For
example, aluminum or copper, or other high heat conduction material
is preferred, and in order to conduct the cold heat from one end to
other end of cooling pin 134 at high thermal conduction efficiency,
its periphery is desired to be covered with heat insulator 152.
[0371] Thus, the thermal capacity of cooling pin 134 is more than
50 times or preferably more than 100 times of the thermal capacity
of atomizing electrode 135, and direct effects of temperature
changes of the cooling section on the atomizing electrode are
lowered. As a result, stable mist atomizing is realized at smaller
load fluctuations.
[0372] As the upper limit of the thermal capacity, the thermal
capacity of cooling pin 134 is 500 times or less or 1000 times or
less of the thermal capacity of atomizing electrode 135. If the
thermal capacity is too large, a greater energy is needed for
cooling of cooling pin 134, and cooling of cooling pin stably at
low energy is difficult. By keeping within such upper limit, if
thermal load fluctuations from the cooling section are changed,
direct effect on the atomizing electrode can be lessened, and the
atomizing electrode can be cooled stably while saving energy.
[0373] Further by controlling the thermal capacity within such
upper limit, it is possible to control the time lag required for
cooling of the atomizing electrode by way of cooling pin 134 within
a proper range. As a result, delay in starting can be prevented
when cooling the atomizing electrode, that is, when supplying water
into the mist maker, and the atomizing electrode can be cooled
stably and appropriately.
[0374] As in this preferred embodiment, when cooling pin 134 is
provided with through-section 165, the rigidity of the heat
insulating wall may be lowered when molding by foamed styrol or the
like, and defects such as crack or hole may be formed due to lack
of strength or defective molding.
[0375] In the preferred embodiment, protrusion 162 projecting into
discharging air dust 141 from freezer compartment is provided in
heat insulator 152 of rear partition 111 near through-section 165
having cooling pin 134. As a result, as compared with the flat
plane of the cooling pin 134 side in outlet air-duct 141 for
freezer compartment not provided with protrusion 162 in outlet
air-duct 141 for freezer compartment, the rigidity is heightened in
the periphery of through-section 165, and the wall thickness of
heat insulator 152 is increased, and the rigidity is further
enhanced. Moreover, by protrusion 162, cooling pin 134 can be
cooled from both the lateral side and the back side.
[0376] Further, in order to suppress increase of air duct
resistance, the outer circumference of protrusion 162 is formed in
a conical slope so as to be thinner as going toward the leading
end.
[0377] At this time, if cooling pin 134 is directly installed in
the air duct (outlet air-duct 141 for freezer compartment), cooling
becomes excessive, and the dew condensation amount in atomizing
electrode 135 increases too much, or freezing may occur.
[0378] Accordingly, a hole (through-section 165) is provided in the
heat insulator near the back side of cooling pin 134, and cooling
pin 134 is inserted in this hole, and its periphery is surrounded
by heat conducting pin cover 166 made of PS, PP or other resin
material having both heat insulating property and water-proof
property, so that the heat insulation is assured.
[0379] Heat conducting pin cover 166 may be also made of a
rest-resistance insulation tape or the like. Although not shown in
the drawing, when a buffer material is provided in through-section
165 and heat conducting pin cover 166, and the sealing property is
assured, it is more effective to prevent invasion of cold air from
outlet air-duct 141 for freezer compartment into the periphery of
cooling pin 134.
[0380] It is more effective by shutting off cold air by adhering a
tape or the like, not shown, to opening 167 of through-section
165.
[0381] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0382] Cooling pin 134 is cooled by way of heat conducting pin
cover 166, and atomizing electrode 135 is cooled indirectly by way
of cooling pin 134. It is also cooled indirectly in a dual
structure by way of heat conducting pin cover 166 of heat
cushioning material. Accordingly, atomizing electrode 135 is not
cooled extremely. If atomizing electrode 135 is cooled extremely,
the dew condensation amount is increased extremely, and the load to
mist generation department 139 is increased, and the input to
electrostatic atomizing device 131 increases, and mist generation
department 139 may be frozen, and mist-making failure may occur. By
cooling indirectly in a dual structure, however, defects by such
increase of load in mist generation department 139 can be
prevented. Therefore, an appropriate dew condensation amount is
maintained, and stable mist atomizing is realized at low input.
[0383] Atomizing electrode 135 is cooled indirectly in a dual
structure by way of cooling pin 134 of heat conduction material and
a heat cushioning material (heat conducting pin cover 166, heat
insulator 152). As a result, direct effects of temperature changes
of cooling section on atomizing electrode 135 can be lessened, and
load fluctuations of atomizing electrode 135 can be suppressed, and
mist atomizing of a stable mist amount is realized.
[0384] Since cooling pin 134 is cooled by the cold air generated in
cooling compartment 110, and cooling pin 134 is formed of a metal
piece of excellent heat conduction. Hence, the cooling section can
cool as required only by the heat conduction from the air duct
(outlet air-duct 141 for freezer compartment) of flow of cold air
generated in evaporator 112.
[0385] At this time, cooling pin 134 in this preferred embodiment
has protrusion 134a formed at the reverse side of atomizing
electrode 135. Therefore, in mist generation department 139, end
portion 134b at the protrusion 134a side is closest to the cooling
section, and cooling pin 134 is cooled from the end portion 134b
side remotest from atomizing electrode 135 by the cold air from the
cooling section.
[0386] Thus, in the preferred embodiment, protrusion 162 projecting
into discharging air duct 141 from freeze compartment is provided
in heat insulator 152 near through-section 165. Hence, if the
rigidity is heightened in the periphery of through-section 165,
cooling pin 134 can be cooled from both the lateral side and the
back side. Therefore, the surface area for heat conduction can be
increased, and the rigidity in the periphery of cooling pin 134 can
be increased without lowering the cooling efficiency of cooling pin
134 of heat conduction material.
[0387] Besides, the outer circumference of protrusion 162 is formed
in a conical slope becoming thinner as going toward the leading
end. As a result, the cold air flows while crawling along the outer
circumference of protrusion 162 having a curved surface to the cold
air flowing direction, and increase of air duct resistance is
suppressed, and cooling pin 134 of heat conduction material is
cooled uniformly from the outer circumference of the lateral wall.
Therefore, cooling pin 134 can be cooled uniformly, and atomizing
electrode 135 can be cooled efficiently by way of cooling pin
134.
[0388] Through-section 165 is formed in only a part of the back
side of cooling pin 134 of heat insulator 152, and thin wall
portion is not provided, and the foamed styrol can be molded
easily, and there is no problem of breakage in the assembling
process.
[0389] In the configuration of the present preferred embodiment,
the portion contacting with the cooling section (low-temperature
air) at the back side of heat conducting pin cover 166 is a heat
buffering material. The heat buffering state of the heat buffering
material can be adjusted by varying the thickness of the portion of
heat conducting pin cover 166 contacting with the cold air.
Therefore, the cooling state of cooling pin 134 can be varied
easily, and when applied in refrigerators of various storage
capacities, for example, it is applicable by varying the thickness
of heat conducting pin cover 166 depending on the cooling load.
[0390] There is no gap between heat conducting pin cover 166 and
through-section 165, and the opening of through-section 165 is
sealed with a tape or the like to shut off invasion of cold air
from an adjacent section. Therefore, low-temperature air does not
leak into the compartment, and dew condensation or low temperature
abnormality will not occur in vegetable compartment 107 or
peripheral parts.
[0391] Thus, when cooling by the cooling section, cooling pin 134
is cooled from the end portion 134b side remotest from atomizing
electrode 135. Therefore, after cooling of cooling pin 134 of large
thermal capacity, atomizing electrode 135 is cooled by cooling pin
134 of heat conduction material, and direct effects of temperature
changes of the cooling section on atomizing electrode 135 can be
further lessened, and a stable mist atomizing of smaller load
fluctuations can be realized.
[0392] The generated fine mist is atomized into vegetable
compartment 107, but since the particles are very small, and the
diffusion is strong, and the fine mist reaches all parts of
vegetable compartment 107.
[0393] Since the mist making device is electrostatic atomizing
device 131, the generated fine mist is very small in particle size,
and is strong in diffusion property, and reaches into the entire
space of vegetable compartment 107 to be atomized. The atomized
fine mist is generated by high voltage discharge, and is charged
negatively. Vegetable compartment 107 contains positively charged
vegetables and fruit. Therefore, the atomized mist is likely to
deposit on the surface of vegetables, and the freshness may be
enhanced.
[0394] The nano-level mist sticking to the surface of vegetables
contains OH radicals and traces of ozone, and it is effective for
killing germs, resisting germs and removing germs, and still more,
vegetables are encouraged to increase in nutrients such as vitamin
C by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0395] In the case of using, for mist atomizing, dew condensation
water by dew condensation of moisture in the air by cooling of
atomizing electrode 135 as in the preferred embodiment, if there is
no water in atomizing electrode 135, the discharge distance becomes
longer, and the insulation layer of air cannot be broken, and
discharge phenomenon does not take place. As a result, no current
flows between atomizing electrode 135 and opposite electrode 136,
but this phenomenon is detected by controller 146 of refrigerator
100, and the high voltage of voltage applicator 133 can be turned
on and off, so that the thermal load into the compartment is
suppressed, while energy is saved.
[0396] Thus, in the preferred embodiment, in the configuration of
cooling pin 134 at protrusion 134a of mist generation department
139, through-section 165 is formed in heat insulator 152, and
cooling pin 134 is inserted in this position, and heat conducting
pin cover 166 is provided in the periphery. As a result, while the
cooling capacity on cooling pin 134 of heat conduction material is
maintained, heat insulator 152 can be molded easily.
[0397] By covering the lateral side and back side of cooling pin
134 with an integrally molded heat conducting pin cover 166,
invasion of cold air from outlet air-duct 141 for freezer
compartment disposed at the back side into the periphery of cooling
pin 134 can be prevented effectively.
[0398] In the preferred embodiment, a buffer material may be
provided in the periphery of cooling pin 134. As a result, the gap
between through-section 165 and heat conducting pin cover 166 can
be narrowed, and escape of cold air can be prevented.
[0399] In the preferred embodiment, opening 167 of through-section
165 is not closed with tape or other insulating material, but it
may be also closed. As a result, escape of cold air can be
prevented.
[0400] In the preferred embodiment, outlet air-duct 141 for freezer
compartment is the air duct for cooling of cooling pin 134, but the
same role may be played by other low-temperature air passage such
as discharging air duct of icemaker 106, or return air passage of
freezer compartment 108. As a result, the possible location for
installing electrostatic atomizing device 131 is extended.
[0401] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 is the cold air cooled by using the cooling
source generated in the freezing cycle of refrigerator 100. But it
may be also possible to use the heat conduction from the cooling
tube making use of cold air or low temperature from the cooling
source of refrigerator 100. As a result, by adjusting the
temperature of the cooling tube, cooling pin 134 of the conduction
material may be cooled to a desired temperature, and it is easy to
manage the temperature when cooling atomizing electrode 135 at the
tip of the department mist.
[0402] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 may be realized by an auxiliary component such
as Peltier element making use of Peltier effect. In this case, by
supply voltage to the Peltier element, the temperature at the
leading end of atomizing electrode 135 may be controlled at a very
delicate temperature.
[0403] In the preferred embodiment, buffer material is not used
between outlet wall 137 of electrostatic atomizing device 131 and
recess 111a of heat insulator 152. However, to prevent invasion of
humidity into cooling pin 134 or prevent loosening, it is possible
to compose urethane foam or other cushioning material between
outlet wall 137 of electrostatic atomizing device 131 and recess
111a of heat insulator 152. As a result, invasion of humidity into
cooling pin 134 can be prevented, and dew condensation on heat
insulator 152 can be prevented.
Preferred Embodiment 6
[0404] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 6 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 6 of the present invention is same as FIG. 2. FIG. 8
shows a sectional view cut along line A-A in FIG. 2 as shown from
the arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment 6
of the present invention.
[0405] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 5 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
5 or applicable to the same technical concept are omitted in
explanation.
[0406] In the drawing, rear partition 111 is composed of surface of
rear-end partition 151 composed of ABS or other resin, and heat
insulator 152 composed of foamed styrol or the like for thermally
isolating between surface of rear-end partition 151 and outlet
air-duct 141 for freezer compartment. It also has partition board
161 for isolating between outlet air-duct 141 for freezer
compartment and cooling compartment 110. Between surface of
rear-end partition 151 at the vegetable compartment 107 side and
heat insulator 152, heater 154 or other heating device is provided
for regulating the temperature of vegetable compartment 107, or
preventing dew condensation on the surface.
[0407] Herein, through-section 165 is provided in a part of the
wall surface at the inside of vegetable compartment 107 of rear
partition 111, and electrostatic atomizing device 131 is installed
at this position.
[0408] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139, voltage applicator 133, and outlet
wall 137, and in a part of outlet wall 137, atomizing port 132 and
humidity supplying port 138 are composed.
[0409] Electrostatic atomizing device 131 atomizes a mist of dew
condensation water generated in atomizing electrode 135 from the
moisture in the air around mist generation department 139 by
cooling atomizing electrode 135 provided in mist generation
department 139 lower than the dew point temperature by the
evaporator.
[0410] At this time of dew condensation, in the preferred
embodiment, the low-temperature air flowing in outlet air-duct 141
for freezer compartment is used as the evaporator. Atomizing
electrode 135 is not cooled directly, but atomizing electrode 135
is cooled by way of cooling pin 134 having a larger thermal
capacity than atomizing electrode 135.
[0411] Atomizing electrode 135 is installed in mist generation
department 139, and atomizing electrode 135 is connected and fixed
to cooling pin 134 of heat conduction material such as aluminum or
stainless steel. It is also connected electrically to one end wired
from voltage applicator 133.
[0412] Cooling pin 134 has a large thermal capacity, 50 times or
more to 1000 times or less, preferably 100 times or more to 500
times or less, as compared with atomizing electrode 135. For
example, aluminum or copper, or other high heat conduction material
is preferred, and in order to conduct the cold heat from one end to
other end of cooling pin 134 at high thermal conduction efficiency,
its periphery is desired to be covered with heat insulator 152.
[0413] Thus, the thermal capacity of cooling pin 134 is more than
50 times or preferably more than 100 times of the thermal capacity
of atomizing electrode 135. As a result, direct effects of
temperature changes of the cooling section on the atomizing
electrode are lowered, and stable mist atomizing is realized at
smaller load fluctuations.
[0414] As the upper limit of the thermal capacity, the thermal
capacity of cooling pin 134 is 500 times or less or preferably 1000
times or less of the thermal capacity of atomizing electrode 135.
If the thermal capacity is too large, a greater energy is needed
for cooling of cooling pin 134, and cooling of cooling pin stably
at low energy is difficult.
[0415] By keeping within such upper limit, if thermal load
fluctuations from the cooling section are changed, direct effect on
the atomizing electrode can be lessened, and the atomizing
electrode can be cooled stably while saving energy. Further by
controlling the thermal capacity within such upper limit, it is
possible to control the time lag required for cooing of the
atomizing electrode by way of cooling pin 134 within a proper
range. As a result, delay in starting can be prevented when cooling
atomizing electrode 135, that is, when supplying water into the
mist maker, and the atomizing electrode can be cooled stably and
appropriately.
[0416] Through-section 165 is provided at the back side of recess
111a, and protrusion 134a of cooling pin 134 of heat conduction
material is provided in this through-section 165.
[0417] Since cooling pin 134 is provided with through-section 165,
the rigidity of the heat insulating wall may be lowered when
molding by foamed styrol or the like, and defects such as crack or
hole may be formed due to lack of strength or defective
molding.
[0418] In the preferred embodiment, accordingly, protrusion 162
projecting into discharging air dust 141 from freezer compartment
and contacting with partition board 161 at the leading end is
provided in heat insulator 152 near through-section 165. As a
result, as compared with the flat plane of the cooling pin 134 side
in outlet air-duct 141 for freezer compartment not provided with
protrusion 162 in outlet air-duct 141 for freezer compartment, the
rigidity is heightened in the periphery of through-section 165, and
the wall thickness of heat insulator 152 is increased, and the
rigidity is further enhanced. Moreover, by protrusion 162, cooling
pin 134 can be cooled from both the lateral side and the back
side.
[0419] At this time, if cooling pin 134 is directly installed in
the air duct (outlet air-duct 141 for freezer compartment), cooling
becomes excessive, and the dew condensation amount in atomizing
electrode 135 at the tip of the department mist increases too much,
or freezing may occur.
[0420] Accordingly, through-section 165 is provided in heat
insulator 152 at the back side of atomizing electrode 135, and
protrusion 162 projecting into discharging air dust 141 from
freezer compartment and contacting with partition board 161 at the
leading end is provided in heat insulator 152 near through-section
165. As a result, by inserting cooling pin 134 into through-section
165 and assuring heat insulation, cooling pin 134 does not contact
directly with the cooling section, and contacts with heat insulator
152 of heat cushioning material by way of partition board 161.
[0421] At this time, the entire lateral side of cooling pin 134 of
circular columnar shape is covered with heat insulator 152.
[0422] Opening 167 of through-section 165 is shielded from the air
duct by means of partition board 161 isolating discharging air dust
141 from freezer compartment and cooling compartment 110, and the
seating property is assured.
[0423] It is more effective by shutting off cold air by adhering a
tape or the like, not shown, to opening 167 of through-section
165.
[0424] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0425] Cooling pin 134 of heat conduction material is cooled from
the lateral side by way of protrusion 162 of heat insulator 152.
Therefore, mist generation department 135 is cooled indirectly by
way of cooling pin 134. It is also cooled indirectly in a dual
structure by way of protrusion 162 of heat insulator 152.
Accordingly, mist generation department 135 is not cooled
extremely.
[0426] The surrounding of cooling pin 134 of circular columnar
shape is enclosed conically by heat insulator 152, and the thinnest
part of the heat insulation wall is the remotest side from
atomizing electrode 135. Therefore, the portion positioned near
opening 167 especially on the outer circumference of the lateral
side of cooling pin 134 is cooled most strongly, and other parts
are also cooled uniformly from the outer circumference of the side
wall.
[0427] The end side of the air duct side (outlet air-duct 141 for
freezer compartment) of cooling pin 134 is shut off from the air
duct (outlet air-duct 141 for freezer compartment) by means of
partition board 161. Further, a certain distance is provided at the
end face of protrusion 162, and partition board 161 is pressed and
fitted. As a result, a creeping distance is assured, and the cold
air is prevented from hitting directly cooling pin 134 of heat
conduction material. Moreover, the sealing property may be enhanced
by adhering a tape or the like to the end face. Thus, by fixing
opening 167 of through-section 165 to partition board 161, if
temperature changes are significant in refrigerator 100 due to
ambient temperature, compartment temperature, or defrosting
control, cooling pin 135 and mist generation department 139 can be
fixed securely if thermal distortion occurs.
[0428] Through-section 165 is formed only in part of the back side
of cooling pin 134 of heat insulator 152, and thin-wall part is not
formed, and the foamed styrol can be molded easily, and there is no
problem of breakage in the assembling process.
[0429] There is no gap between cooling pin 134 and through-section
165, and opening 167 of through-section 165 is sealed with a tape
or the like to shut off invasion of cold air. Therefore, there is
no communicating part, and low-temperature air does not leak into
the compartment, and dew condensation or low temperature
abnormality will not occur in vegetable compartment 107 or
peripheral parts.
[0430] As a result, rear partition 111 is reduced in thickness, and
the storage capacity of the compartment is further increased.
[0431] Thus, when cooling by the cooling section, end portion 134b
of the remotest side from atomizing electrode 135 of cooling pin
135 is cooled most strongly. Therefore, after cooling of cooling
pin 134 of large thermal capacity, atomizing electrode 135 is
cooled by cooling pin 134, and direct effects of temperature
changes of the cooling section on atomizing electrode 135 can be
further lessened, and a stable mist atomizing of smaller load
fluctuations can be realized.
[0432] Since the mist maker is electrostatic atomizing device 131,
the generated fine mist particles are very small, and the diffusion
is strong, and the fine mist reaches all parts of vegetable
compartment 107. The atomized fine mist is generated by high
voltage discharge, and is charged negatively, while compartment 107
contains positively charged vegetables and fruit, and the atomized
mist is likely to deposit on the surface of vegetables, and the
freshness may be enhanced.
[0433] The nano-level mist sticking to the surface of vegetables
contains OH radicals and traces of ozone, and it is effective for
killing germs, resisting germs and removing germs, and still more,
vegetables are encouraged to increase in nutrients such as vitamin
C by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0434] If there is no water in atomizing electrode 135, the
discharge distance becomes longer, and the insulation layer of air
cannot be broken, and discharge phenomenon does not take place. As
a result, no current flows between atomizing electrode 135 and
opposite electrode 136. This phenomenon is detected by controller
146 of refrigerator 100, and the high voltage of voltage applicator
133 can be turned on and off, so that the thermal load into the
compartment is suppressed, while energy is saved.
[0435] Thus, in the preferred embodiment, through-section 165 is
formed in heat insulator 152, and cooling pin 134 is inserted in
this position, and the end face of cooling pin 134 is covered with
partition board 161. As a result, cooling pin 134 is cooled by way
of protrusion 162 of heat insulator 152 and partition board 161.
Therefore, atomizing electrode 135 is cooled indirectly by cooling
pin 134. Further, it can be cooled indirectly in a dual structure
by way of protrusion 162 of heat insulator 152. It is hence
effective to prevent extreme cooling of atomizing electrode 135 at
the tip of the department mist. The end face of the air duct side
(outlet air-duct 141 for freezer compartment) of cooling pin 134 is
shut off from the air duct (outlet air-duct 141 for freezer
compartment) by partition board 161. Further, a certain distance is
provided at the end face of protrusion 162, and partition board 161
is pressed and fitted, and a creeping distance is assured, and the
cold air is prevented from hitting directly cooling pin 134.
[0436] As a result, over-cooling of cooling pin 134 is prevented,
and overcooling or dew condensation in storage compartment
(vegetable compartment 107) due to leak of cold air or the like may
be prevented.
[0437] In the preferred embodiment, protrusion 162 projecting into
outlet air-duct 141 for freezer compartment is provided in heat
insulator 152 of rear partition 111 near the back side of cooling
pin 134. As a result, as compared with the flat plane of the
cooling pin 134 side in outlet air-duct 141 for freezer compartment
not provided with protrusion 162 in outlet air-duct 141 for freezer
compartment, the rigidity is heightened in the periphery of cooling
pin 134, and cooling pin 134 of heat conduction material can be
cooled from the lateral side. Therefore the surface area for heat
conduction can be increased, and the rigidity is heightened in the
periphery of cooling pin 134 without lowering the cooling
efficiency of cooling pin 134 of heat conduction material.
[0438] Besides, the outer circumference of protrusion 162 is formed
in a conical slope becoming thinner as going toward the leading
end, and the cold air flows while crawling along the outer
circumference of protrusion 162 having a curved surface to the cold
air flowing direction. Therefore, increase of air duct resistance
in outlet air-duct 141 for freezer compartment is suppressed, and
cooling pin 134 is cooled uniformly from the outer circumference of
the lateral wall. Therefore, cooling pin 134 can be cooled
uniformly, and atomizing electrode 135 can be cooled efficiently by
way of cooling pin 134.
[0439] The shape of protrusion 162 may be a circular columnar form,
and cooling pin 134 can be cooled uniformly from the lateral side
of cooling pin 134, and more uniform cooling is realized.
[0440] In the preferred embodiment, by fixing (pressing) opening
167 of through-section 165 to partition board 161, if temperature
changes are significant in refrigerator 100 due to ambient
temperature, compartment temperature, or defrosting control,
cooling pin 135 and mist generation department 139 can be fixed
securely if thermal distortion occurs.
[0441] In the preferred embodiment, a buffer material may be
provided in the periphery of cooling pin 134. As a result, cooling
pin 134 and through-section 165 can be connected tightly, and
escape of cold air can be prevented. In the preferred embodiment,
opening 167 of through-section 165 is not closed with tape or other
insulating material, but it may be also closed. As a result, escape
of cold air can be prevented more securely.
[0442] In the preferred embodiment, buffer material is not used
between outlet wall 137 of electrostatic atomizing device 131 and
through-section 165 of heat insulator 152. However, to prevent
invasion of humidity into cooling pin 134 or prevent loosening, it
is possible to compose urethane foam or other cushioning material
between outlet wall 137 of electrostatic atomizing device 131 and
recess 111a of heat insulator 152 or through-section 165. Or, as
shown in preferred embodiment 5 shown in FIG. 7, heat conducting
pin cover may be provided. As a result, invasion of humidity into
cooling pin 134 can be prevented, and dew condensation on heat
insulator 152 can be prevented.
Preferred Embodiment 7
[0443] FIG. 9 shows a sectional view of essential parts showing a
section of a refrigerator in accordance with preferred embodiment 7
of the present invention, where the vegetable compartment and its
periphery of the partition in its part are cut vertically and
parted to right and left sections. FIG. 10 shows a sectional view
of a refrigerator cut along line B-B in FIG. 9 as seen from the
arrow direction of the cut-section in accordance with preferred
embodiment 7 of the present invention. FIG. 11 shows a sectional
view cut along line C-C in FIG. 10 as seen from the arrow direction
of the cut-section, and the sectional view illustrates an upper
partition of a vegetable compartment of the refrigerator in
accordance with preferred embodiment 7 of the present
invention.
[0444] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 6 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
6 or applicable to the same technical concept are omitted in
explanation.
[0445] In the drawing, thermally insulated cabinet 101 of the
refrigerator main body of refrigerator 100 is composed of outer
case 102 mainly made of steel plate, inner case 103 molded of ABS
or other resin, and foamed heat insulating material such as rigid
foamed urethane foamed and filled in a space between outer case 102
and inner case 103. Thermally insulted box 101 is divided into a
plurality of storage compartments thermally insulated from the
surrounding. In the preferred embodiment, vegetable compartment 107
is disposed in the lowest part of refrigerator 100, and freezer
compartment 108 at a relatively low temperature setting of freezing
temperature is disposed in the upper part, and the space is divided
by partition 174 and sectioned as storage compartments.
[0446] At the back side of freezer compartment 108, cooling
compartment 110 for generating cold air is provided, and the space
between them includes cold air conveying air ducts to each
thermally insulated compartment, and rear partition 111 composed
for thermally insulating from each compartment.
[0447] The cold air generated in evaporator 112 of cooling
compartment 110 is conveyed into each compartment by means of
cooling fan 113. In vegetable compartment 107 of the preferred
embodiment, the cold air generated in evaporator 112 flows into
vegetable compartment 107 through outlet air-duct 182 for vegetable
compartment, directly or by way of a returning air duct exchanged
in heat in other compartment, and returns to evaporator 112 again
from inlet air-duct 181 for vegetable compartment.
[0448] In the upper side of vegetable compartment 107, partition
174 is composed to be separated from freezer compartment 108.
[0449] Partition 174 is composed of partition on vegetable
compartment 173 and partition on freezer side 172 made of ABS or
other resin, and heat insulator 171 formed between them and made of
foamed styrol or urethane for insulating thermally. Recess 174a is
provided in a part of the wall of the vegetable compartment 107
side of partition 174 so as to be lower in temperature than in
other parts, and electrostatic atomizing device 131 and mist air
duct 177 are installed in this position.
[0450] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139 and voltage applicator 133.
Atomizing electrode 135 is installed in mist generation department
139, and atomizing electrode 135 is fixed to cooling pin 134 of
heat conduction material such as aluminum, stainless steel or
brass, and is electrically connected including one end wired from
voltage applicator 133.
[0451] The thermal capacity of cooling pin 134 of heat conduction
material is more than 50 times or preferably more than 100 times of
the thermal capacity of atomizing electrode 135. For example,
aluminum or copper, or other high heat conduction material is
preferred, and in order to conduct heat from one end to other end
of cooling pin 134 efficiently, its surrounding is desired to be
covered with a heat insulating material.
[0452] In a long range, it is also important to maintain the heat
conduction between atomizing electrode 135 and cooling pin 134.
Therefore, to prevent invasion of humidity or the like into the
connection part, epoxy resin material or the like is poured in to
suppress heat resistance, and atomizing electrode 135 and cooling
pin 134 are fixed. Or to lower the heat resistance, atomizing
electrode 135 may be press-fitted and fixed into cooling pin
134.
[0453] Cooling pin 134 is required to conduct the cold temperature
within the heat insulating material for thermally insulating the
storage compartment and evaporator 112 or the air duct. Therefore,
its length is desired to be 5 mm or more, or preferably 10 mm or
more. However, if the length is more than 30 mm, its effect is
lowered, and partition 174 is increased in the wall thickness, and
the storage capacity of the compartment is decreased.
[0454] Electrostatic atomizing device 131 installed in vegetable
compartment 107 is exposed to high humidity environment, and the
humidity may have effects on cooling pin 134, and cooling pin 134
is desired to be made of a corrosion resistive or rust preventive
metal material, or the material surface is desired to be treated by
alumite or coating.
[0455] Cooling pin 134 is fitted into recess 174a provided in a
part of heat insulator 171, and fixed into heat insulator 171.
Atomizing electrode 135 is fitted to cooling pin 134 in a form
projecting in an L-shape. This is intended to contribute to
reduction of wall thickness of partition 174 in order to increase
the storage capacity of the refrigerator.
[0456] The opposite side end of atomizing electrode 135 of cooling
pin 134 is press-fitted to partition on freezer side 172 formed by
ABS or PP resin molding. From freezer compartment 108, atomizing
electrode 135 is cooled by way of partition on freezer side 172,
and dew is condensed on the leading end, and water is
generated.
[0457] Thus, the cooling section can be formed in a simple
structure, and mist generation department 139 of low trouble rate
and high reliability is realized. Also by making use of the cooling
source of the freezing cycle, cooling pin 134 of heat conduction
material and atomizing electrode 135 at the tip of the department
mist can be cooled, and mist-making is realized at low energy.
[0458] At an opposite position of atomizing electrode 135, circular
doughnut-shaped opposite electrode 136 is provided at a certain
distance from the leading end of atomizing electrode 135, and mist
air-duct 177 is formed on its extension.
[0459] Mist air-duct 177 is provided in recess 174a of partition
174 separating between vegetable compartment 107 and freezer
compartment 108.
[0460] The wall thickness of partition 174 is generally 25 mm to 45
mm in order to satisfy both heat insulation and storage capacity.
Mist air-duct 177 is provided in this recess 174a.
[0461] Mist air-duct 177 includes mist sucking port 183 for
supplying humidity from vegetable compartment 107, and mist
discharge port 176 for atomizing mist into vegetable compartment
107. From this mist sucking port 183, air of high humidity flows
into mist generation department 139, and since atomizing electrode
135 in mist generation department 139 is cooled by way of the
cooling pin by heat conduction from the freezer compartment, so
that dew is condensed on the leading end of atomizing electrode
135.
[0462] Mist is generated by applying a high voltage between the
leading end of atomizing electrode 135 and opposite electrode
136.
[0463] The generated mist passes through mist air-duct 177, and is
atomized into vegetable compartment 107 from mist discharge port
176.
[0464] Voltage applicator 133 is electrically connected to mist
generation department 139, and the negative potential side of
voltage applicator 133 for generating a high voltage is
electrically wired and connected to atomizing electrode 135, and
the positive potential side, to opposite electrode 136,
respectively.
[0465] Near atomizing electrode 135, discharge is always occurring
due to mist atomizing, and abrasion may be caused at the leading
end of atomizing electrode 135. Since refrigerator 100 is usually
operated for more than 10 years, the surface of atomizing electrode
135 requires a tough surface treatment, and, for example, nickel
plating, gold plating or platinum plating is desired.
[0466] Opposite electrode 136 is made of stainless steel, for
example, and its long-term reliability is demanded, and the surface
is preferred to be treated by platinum plating or the like to
prevent sticking of foreign mater or prevent contamination, in
particular.
[0467] Voltage applicator 133 communicates with and is controlled
by controller 146 of the refrigerator main body (thermally
insulated cabinet 101), and the high voltage is turned on or off by
the input signal from refrigerator 100 or electrostatic atomizing
device 131.
[0468] Partition 174 for fixing electrostatic atomizing device 131
is provided with heater 178 or other heating device for preventing
dew condensation in the air duct.
[0469] In the refrigerator having such configuration, the operation
and actions are explained below. The thickness of heat insulator
171 of partition 174 having electrostatic atomizing device 131
requires enough cooling capacity for cooling of cooling pin 134 to
which atomizing electrode 135 is fixed. The wall thickness of the
position of location of electrostatic atomizing device 131 is
thinner than in other parts. Accordingly, by heat conduction from
the freezer compartment at a relatively low temperature, cooling
pin 134 of heat conduction material is cooled, and atomizing
electrode 135 at the tip of the department mist can be cooled.
Herein, when the leading end temperature of atomizing electrode 135
is controlled under the dew point, the steam near atomizing
electrode 135 is collected to condense dew on atomizing electrode
135, and water drops are formed securely.
[0470] Although not shown, by installing a compartment temperature
sensor or a compartment humidity sensor in the refrigerator, the
dew point can be calculated depending on the compartment
environmental changes strictly according to a predetermined
formula.
[0471] A high voltage (for example, 7.5 kV) is applied between two
electrodes, that is, atomizing electrode 135 at negative voltage
side, and opposite electrode 136 at positive electrode side, from
voltage applicator 133. At this time, the air insulation layer is
broken between the electrodes, and a corona discharge takes place,
and water on atomizing electrode 135 is atomized from the leading
end of the electrode, and electrically charged invisible nano-level
fine mist of 1 micrometer or less is generated, together with
accompanying ozone and OH radical.
[0472] The generated fine mist is atomized into the vegetable
compartment (lower basket 119, upper basket 120) of vegetable
compartment 107. The fine mist atomized from electrostatic
atomizing device 131 is charged negatively. On the other hand,
vegetable compartment 107 contains vegetables and fruit, including
green and leafy plants or fruit. Some of the vegetables and fruit
stored in the vegetable compartment may be already withered due to
transpiration when returning from shop or during storage. These
vegetables and fruit are usually positively charged, and the
atomized fine mist charged negatively is likely to gather on the
surface of vegetables. When the humidity in vegetable compartment
107 is raised again, the atomized fine mist deposits simultaneously
on the surface of vegetables or fruit, and transpiration from
vegetables and fruit is suppressed, and the keeping-fresh
performance is enhanced. The moisture permeates into the tissues
from gaps among cells in the vegetables and fruit, and transpires,
and water is supplied again into the withered cells, and the cells
are swollen, stretched and refreshed.
[0473] The generated fine mist holds ozone and OH radicals, and
they have a strong oxidation power. Accordingly, the generated fine
mist can deodorize inside of the vegetable compartment, and
sterilize and bactericide the vegetable surface, and can also
oxidize, decompose, and remove agricultural chemicals, wax, and
other harmful substances sticking to the vegetable surface.
[0474] In the preferred embodiment, thermally insulated cabinet 101
has a plurality of storage compartments. The ceiling side of
vegetable compartment 107 having mist generation department 139 is
provided with freezer compartment 108 which is a low-temperature
storage compartment kept at lower temperature than vegetable
compartment 107. Mist generation department 139 is provided in
partition 174 at the ceiling side of vegetable compartment 107.
[0475] If a storage compartment in freezing temperature zone such
as refrigerator compartment 108 or icemaker 106 is provided in the
upper part of vegetable compartment 107 having mist generation
department 139, mist generation department 139 is installed in
partition 174 on the ceiling for partitioning them. As a result, by
the cold air from freezer compartment 108 in the upper part,
cooling pin 134 in mist generation department 139 is cooled, and
atomizing electrode 135 is cooled, and dew can be condensed.
Therefore, any particular cooling device is not needed, and mist
generation department 139 can be composed in a simple structure,
and a mist generation department of low trouble rate and high
reliability can be realized.
[0476] In the preferred embodiment, a partition for dividing the
storage compartment is provided, and freezer compartment 108 is
provided as a low temperature storage compartment at the ceiling
side of vegetable compartment 107. Electrostatic atomizing device
131 is provided in partition 174 on the ceiling. Therefore, when
the storage compartment of the freezing temperature zone such as
freezer compartment 108 or icemaker 106 is installed in the upper
part, atomizing electrode 135 is installed in partition 174 on the
ceiling for partitioning them, and the upper storage compartment is
used as cooling source, and atomizing electrode 135 is cooled, and
dew can be condensed. Therefore, any particular cooling device is
not needed, and the mist can be atomized from the ceiling, and the
mist is likely to diffuse in all parts of the containers of
vegetable compartment 107 (lower basket 119, upper basket 120).
[0477] Mist generation department 139 is provided at the inner
sided of partition on vegetable compartment 173, not within the
storing space in vegetable compartment 107, it is rarely touched by
the user, and the safety is enhanced.
[0478] Mist generation department 139 of the preferred embodiment
is designed to generate mist by an electrostatic mist making
system, and water drops are broken and pulverized by high voltage
or other electric energy, and a fine mist is generated. Since the
generated mist is electrically charged, the mist is charged in
opposite polarity to the desired object such as vegetables and
fruit. For example, by atomizing a negatively charge mist to the
positively charged vegetables and fruit, the bonding force on the
vegetables and fruit is increased. The mist is deposited more
uniformly on the vegetable surface, and as compared with the mist
not charged electrically, the mist bonding rate is enhanced. The
atomized fine mist is directly applied into the vegetable
compartments (lower basket 119, upper basket 120), and the fine
mist can be deposited on the vegetable surface by making use of the
potential of the fine mist and the vegetables, and the freshness
can be kept more efficiently.
[0479] Besides, the replenish water used in the preferred
embodiment is not tap water supplied from outside, but is water
from dew condensation. It is free from minerals and impurities, and
deterioration of water due to clogging at the leading end of
atomizing electrode 135 can be prevented.
[0480] The mist in the preferred embodiment contains radicals, and
the agricultural chemicals and wax sticking to the vegetable
surface can be decomposed and removed by a very small amount of
water, and the water is saved, and a low input is realized.
Preferred Embodiment 8
[0481] FIG. 12 a detailed sectional view of periphery of an
ultrasonic mist device in a refrigerator of preferred embodiment 8
of the present invention.
[0482] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 7 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
7 or applicable to the same technical concept are omitted in
explanation.
[0483] In the drawing, rear partition 111 is composed of surface of
rear-end partition 151 made of ABS or other resin, and heat
insulator 152 made of foamed styrol or the like for thermally
insulating the storage compartment. It also has partition 161 for
dividing into outlet air-duct 141 for freezer compartment and
cooling compartment 110. Between surface of rear-end partition 151
and heat insulator 152, heater 154 or other heating device is
installed for regulating the temperature of the storage
compartment, or preventing dew condensation on the surface.
[0484] Recess 111a is provided in a part of the wall surface of the
inside of the storage compartment of rear partition 111, and a mist
maker is installed in this position, that is, horn type ultrasonic
mist device 200.
[0485] Ultrasonic mist device 200 of mist maker is provided in rear
partition 111 having heater 154 in the side wall, and heater 154 is
located at least at a lower side of ultrasonic mist device 200.
[0486] Ultrasonic mist device 200 has horn-shaped section 201 and
cooling pin 205 (heat conduction material) for composing mist
generation department 211. Ultrasonic mist device 200 includes
horn-shaped ultrasonic oscillator 208 composed of mist generation
department 211, electrodes 202, 204, and piezoelectric element 203,
outer wall 207 for fixing and enclosing them, and atomizing port
209 for atomizing mist into the vegetable compartment having outer
wall 207. Horn-shaped section 201, that is, the tip of the
department mist formed in a convex shape from the bottom to the
leading end by cutting process or sintering process. Leading end
201a of horn-shaped section 201 is processed in rectangular or
circular shape, and its sectional surface ratio is about 1/5 or
less, and the side sectional shape of horn-shaped section 201
depends on the oscillation frequency of piezoelectric element 203.
Horn-shaped section 201, electrode 202, piezoelectric element 203,
and electrode 204 are integrally formed in this order, and each
component is adhered and fixed by an adhesive of epoxy or silicone
compound, and the oscillation generated in piezoelectric element
203 is designed to reach the maximum amplitude at leading end 201a
of horn-shaped section 201.
[0487] Piezoelectric element 203 and electrode 204 are formed in a
cylindrical shape, not shown, and the central part is hollow. The
cooling pin is formed in this hollow space, and is adhered and
fixed to horn-shaped section 201.
[0488] The outer core of horn-shaped ultrasonic oscillator 208 is
coated with silicone resin, epoxy resin, acrylic resin or the like
(not shown).
[0489] Horn-shaped section 201 at the tip of the department mist is
made of a material of high heat conduction, such as aluminum,
titanium, stainless steel, or other metal. In particular, from the
viewpoint of light weight, high heat conduction, and amplifying
performance of amplitude in ultrasonic transmission, it is
preferred to select a material mainly composed of aluminum.
However, in consideration of the particular conditions of the
refrigerator such as corrosion resistance and long service life, a
material mainly composed of stainless steel such as SUS304 or
SUS316L is desired because deterioration due to aging hardly
occurs, and the reliability can be assured for a long period of
time.
[0490] Atomizing port 209 has a rectangular or circular hole
provided in a part of outer wall 207, and is provided in a
mist-making direction of the liquid from mist generation department
211, that is, in outer wall 207 of the position opposite to leading
end 201a of horn-shaped section 201.
[0491] Ultrasonic mist device 200 cools horn-shaped section 201 at
the tip of the department mist provided in mist generation
department 211 to lower than dew point temperature by the cooling
unit. As a result, dew is condensed on horn-shaped section 201 from
the moisture in the air in the mist generation department
peripheral part, and the generated dew condensation water is
atomized as mist from leading end 201a.
[0492] If a humid state continues due to frequent opening and
closing of the door or the like, and dew condensation water is
supplied into horn-shaped section 201 more than necessary, the
water is discharged from humidity supplying port 138. This humidity
supplying port 138 has a function of supplying humidity for feeding
cold air into outer wall 207, and also has a function of drain hole
for discharging the water collected in outer wall 207 to
outside.
[0493] Thus, in the present invention, the both openings of
atomizing port 209 and humidity supplying port 138 are provided in
the surface other than the top surface of outer wall 207.
Therefore, if the dew condensation water in the storage compartment
collected in the upper part than outer wall 207 in the storage
compartment in the storage compartment in the refrigerator in the
low temperature closed space drops into outer wall 207, since there
is no opening in the top surface of outer wall 207, the water drop
is prevented from falling into outer wall 207 from outside of outer
wall 207, and a refrigerator of higher safety free from current
leak or short-circuit can be presented.
[0494] Humidity supplying port 138 is provided in the lower part of
outer wall 207, and the upper side of outer wall 207 is closed and
not opened, and if dew is likely to condense in outer wall 207, the
lower side of outer wall 207 is provided with a function of water
draining hole, and is also provided with humidity supplying port
138 as an opening for flow of cold air, and formation of water
scale or growth of bacteria or mold in outer wall 207 can be
prevented.
[0495] The discharged dew condensation water flows along surface of
rear-end partition 151 of rear partition 111, but the amount is
very small, and the water is soon evaporated by convection in the
vegetable compartment or the heater at the back side. At this time,
since the wall is provided with heater 154 or the like, an
ascending stream of air is likely to occur around rear partition
111 as compared with other side walls. Hence, mist generation
department 211 is provided in this rear partition 111, and cold air
of highest humidity flows in from humidity supplying port 138
provided at the lower side of outer wall 207 accommodating the mist
generation department, and dew condensation may be promoted more
effectively.
[0496] In the refrigerator having such configuration, the operation
and actions are explained below.
[0497] The excessive steam in vegetable compartment 107 flows into
cooling pin 205 in ultrasonic mist device 200 installed in a part
of rear partition 111, and is cooled in the air duct from the
freezer compartment in which the cold air of lower temperature than
in the vegetable compartment is flowing. Since cooling pin 205 and
horn-shaped section 201 are tightly bonded, horn-shaped section 201
at tip of the department mist is cooled by heat conduction, and the
steam contained in the damp air in the vegetable compartment is
lowered in temperature, and dew is condensed in horn-shaped section
201, and dew condensation water is generated, and deposits to
leading end 201a.
[0498] In this state, power is supplied to the high voltage
oscillating circuit, and a high voltage is oscillated at a
specified frequency (for example, 80 kHz to 210 kHz), and is
applied to electrode 202 and electrode 204. As a result,
piezoelectric element 203 is oscillated, and capillary waves are
generated on the surface of the supplied water depositing to
leading end 210a of mist generation department 211. The water at
the leading end is pulverized to fine particles of several
micrometers to tens of micrometers, and atomized as mist in the
oscillating direction. Fine particles of mist pass through
atomizing port 209, and larger particles of mist generated from
other parts than leading end 201a of horn-shaped section 201
collide against the outer peripheral wall of rectangular or
circular atomizing port 209. That is, this mist is not atomized
into the storage compartment, but remains in the case, and
relatively small particles of mist are sorted, and only fine mist
is atomized into the storage compartment, that is, vegetable
compartment 107.
[0499] When ultrasonic mist device 200 is operated intermittently
for a specific period, for example, at intervals of 1 minute of ON
and 9 minutes of OFF, the mist generation amount is adjusted, and
the mist is atomized into vegetable compartment 107, so that
vegetable compartment 107 may be humidified quickly. As a result,
vegetable compartment 107 heightened in humidity, and transpiration
from vegetables can be suppressed. At the same time, the
oscillation generated in piezoelectric element 203 is concentrated
in energy so as to reach the maximum amplitude at leading end 201a
of horn-shaped section 201, and piezoelectric element 203 is
suppressed at low heat generation of about 1 W to 2 W, and
temperature effects on vegetable compartment 107 can be
lessened.
[0500] In the refrigerator designed to be operated continuously for
an average period of about 10 years, it is needed to avoid
deterioration of the coating material of piezoelectric element 203.
It is hence preferred to select a coating material mainly composed
of silicone resin which is less deteriorated by repeated
oscillations because of excellent flexibility from the viewpoint of
amplifying performance of oscillation in ultrasonic transmission.
By preventing invasion of liquid and steam into coupling parts with
horn-shaped section 201, electrode 202, piezoelectric element 203,
and electrode 204, and by preventing deterioration of the adhesive,
it contributes to enhancement of service life and reliability, and
it is possible to withstand the actual load when incorporated into
the refrigerator.
[0501] The gap between outer wall 207 and horn type ultrasonic
oscillator may be filled with a packing material (not shown) for
preventing water leak or preventing resonance. As a result,
invasion of liquid or steam can be prevented more securely, and the
noise can be also suppressed. Specifically, by using a packing
material of fluorine compound, the service life and reliability
will be enhanced.
[0502] Thus, the preferred embodiment includes the vegetable
compartment which is thermally partition and exposed to a
relatively high humidity environment, and the horn type ultrasonic
mist device for atomizing liquid into the vegetable compartment,
and a cooling pin is installed in a horn-shaped section for
generated dew condensation water at the leading end of the horn,
and dew is condensed at the leading end, and it is directly
atomized, so that the quality may be maintained in the vegetable
compartment.
[0503] In the preferred embodiment, the liquid to be atomized is
not particularly specified, as far as containing metal ions having
bactericidal power or deodorizing power, such as zinc ion water,
silver ion water, or copper ion water. As a result, microorganisms
formed in the storage compartment may be suppressed.
[0504] In the preferred embodiment, the shape of heat insulator 152
having cooling pin 205 is as shown in FIG. 12. However, similar
effects are obtained if the shape of the portion of location of
cooling pin 205 is as explained above in preferred embodiments 1 to
7.
[0505] In the preferred embodiment, the mist maker is ultrasonic
mist device 200, but it may be also replaced by the electrostatic
atomizing device explained in preferred embodiments 1 to 7, or
other mist makers such as ejector type, and any other mist makers
may be used as far as mist is atomized by using the water condensed
from the moisture in the air, and the technical concept of the
foregoing preferred embodiments may be similarly applied.
Preferred Embodiment 9
[0506] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 9 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 9 of the present invention is same as FIG. 2. FIG. 13
shows a sectional view cut along line A-A in FIG. 2 as seen from
the arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment 9
of the present invention.
[0507] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 8 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
8 or applicable to the same technical concept are omitted in
explanation.
[0508] In the drawing, a recess and through-section 165 are
provided in a part of the wall at the inside of storage compartment
(vegetable compartment 107) of rear partition 111, and
electrostatic atomizing device 131 installed in this position.
[0509] Surface of rear-end partition 151 having electrostatic
atomizing device 131 has protrusion 191, and electrostatic
atomizing device 131 is enclosed between protrusion 191 of the
surface of rear-end partition and heat insulator 152.
[0510] Protrusion 191 of the surface of rear-end partition is
provided with atomizing port 192 on the extension from atomizing
port 132 provided in electrostatic atomizing device 131. Similarly,
humidity supplying port 193 is provided near humidity supplying
port 138 formed in a part of outlet wall 137 of electrostatic
atomizing device 131.
[0511] Through-section 165 having cooling pin 134, if a thin wall
portion of about 2 mm is provided by molding of foamed styrol or
the like, is lowered in the rigidity of the heat insulating wall,
and defects such as crack or hole may be formed due to lack of
strength or defective molding, and the quality may deteriorate.
[0512] In the preferred embodiment, therefore, heat insulator 152
of rear partition 111 near through-hole 165 having cooling pin 134
is provided with protrusion 162 projecting into outlet air-duct 141
for freezer compartment. As result, as compared with a flat plane
at the side of cooling pin 134 in outlet air-duct 141 for freezer
compartment without forming protrusion 162 on outlet air-duct 141
for freezer compartment, the rigidity is heightened around
through-section 165, and the wall thickness of heat insulator 152
is assured, and the rigidity is further heightened. By protrusion
162, moreover, cooling pin 134 can be cooled from both the lateral
side and the back side.
[0513] In order to suppress the increase of air duct resistance,
the outer circumference of protrusion 162 is formed in a conical
slope so as to be thinner as going toward the leading end
[0514] At this time, if cooling pin 134 is directly placed in the
air duct (outlet air-duct 141 for freezer compartment), cooling may
be excessive, and the dew condensation amount of atomizing
electrode 135 may be excessive, or even freezing may be caused.
[0515] Accordingly, through-section 165 is formed in the heat
insulator near the back side of cooling pin 134, and cooling pin
134 is inserted into this position, and it is surrounded by heat
conducting pin cover 166 made of PS, PP or other resin material
having both heat insulating property and water-proof property, so
that the heat insulation is assured. Heat conducting pin cover 166
may be also made of a heat-resistance insulation tape or the
like.
[0516] Although not shown in the drawing, when a buffer material
may be provided between through-section 165 and heat conducting pin
cover 166, and the sealing property is assured, it is more
effective to prevent invasion of cold air from outlet air-duct 141
for freezer compartment into the periphery of cooling pin 134, and
the cold air does not flow into the storage compartment, and
over-cooling or freezing in the storage compartment may be
effectively prevented.
[0517] Cooling pin 134 is fixed in outlet wall 137, and cooling pin
134 itself has protrusion 134a projecting from the outside. This
cooling pin 134 has protrusion 134a at the reverse side of
atomizing electrode 135. Protrusion 134a is smaller than recess
111a of heat insulator 152 of rear partition 111, and is fitted
into the recess formed in through-section 165. Opening 167 at the
side of outlet air-duct 141 for freezer compartment of
through-section 165 is closed with tape (cool air shutout member)
194 such as aluminum tape by adhering to heat insulator 152, and
the cool air is shut off.
[0518] Tape 194 adhered to opening 167 may also contact with
partition 161, so that tape 194 may not be peeled off easily. From
cooling compartment 110, cold heat is transmitted through partition
161 from back side 134b of cooling pin 134.
[0519] However, due to some dimensional error, void 196 may be
present somewhat between cooling pin 134 and heat conducting pin
cover 166. Because of such void 196, this portion becomes an air
layer, and is adiabatic, and cooling of cooling pin 134 may be
impaired. Hence, void 196 is filled up with void burying members
197a, 197b, 197c of heat conduction holding member such as butyl or
heat diffusion compound. That is, these void burying members 197a,
197b, 197c are buried between cooling pin 134 and heat conducting
pin cover 166, or between heat conducting pin cover 166 and tape
184.
[0520] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0521] Cooling pin 134 is cooled by way of heat conducting pin
cover 166, and atomizing electrode 135 is cooled indirectly by way
of cooling pin 134, and it is also cooled indirectly in a dual
structure by way of heat conducting pin cover 166 of heat
cushioning material. At this time, voids 196 are filled with void
burying members 197a, 197b, 197c such as butyl or heat diffusion
compound between cooling pin 134 and heat conducting pin cover 166,
or between heat conducting pin cover 166 and tape 194.
[0522] As a result, between cooling pin 134 and heat conducting pin
cover 166, or between heat conducting pin cover 166 and tape 194,
if there is possibility of forming of void 196 due to processing
precision, heat conduction from tape 194 to heat conducting pin
cover 166, and from heat conducting pin cover 166 to cooling pin
134 can be assured.
[0523] That is, if void 196 is formed, the heat conductivity is
poor in this space, and cooling pin 134 may not be cooled
sufficiently, and the temperature of cooling pin 134 or the
temperature of atomizing electrode 135 may fluctuate, and dew
condensation at the leading end of the atomizing electrode may be
disturbed. However, according to the preferred embodiment, since
void 196 is filled up with void burying members 197a, 197b, 197c
such as butyl or heat diffusion compound, heat conduction from tape
194 to heat conducting pin cover 166, and from heat conducting pin
cover 166 to cooling pin is maintained, and the cooling capacity of
atomizing electrode 135 is assured.
[0524] Cooling pin 134 can be cooled both from the side of cooling
pin 134 by using the cold air generated in cooling compartment 110
by way of heat insulator 152 from outlet air-duct 141 for freezer
compartment, and from back side 134b of cooling pin 134 by heat
conduction through partition 161 of cooling compartment 110 and
tape 194.
[0525] Thus, in the preferred embodiment, heat insulator 152 near
through-section 165 is provided with protrusion 162 projecting into
outlet air-duct 141 for freezer compartment. Therefore, if the
rigidity is heightened around through-section 165, cooling pin 134
can be cooled from both the lateral side and the back side. As a
result, the surface area for heat conduction can be increased, and
without lowering the cooling efficiency of cooling pin 134 of heat
conduction material, the rigidity can be increased around cooling
pin 134.
[0526] Besides, the outer circumference of protrusion 162 is formed
in a conical slope becoming thinner as going toward the leading
end. As a result, the cold air flows while crawling along the outer
circumference of protrusion 162 having a curved surface to the cold
air flowing direction, and increase of air duct resistance is
suppressed. Further, cooling pin 134 can be cooled uniformly from
the outer circumference of the side wall. Therefore, cooling pin
134 is cooled uniformly, and atomizing electrode 135 can be cooled
efficiently by way of cooling pin 134.
[0527] As a penetration hole, through-section 165 is formed in only
a part of the back side of cooling pin 134 of heat insulator 152,
and thin wall portion is not provided, and the foamed styrol can be
molded easily, and there is no problem of breakage in the
assembling process.
[0528] There is no gap between heat conducting pin cover 166 and
through-section 165, and opening 167 of through-section 165 is
sealed with tape 195 to shut off invasion of cold air from the
adjacent cooling air duct. Therefore low-temperature air does not
leak into the compartment, and dew condensation or low temperature
abnormality will not occur in storage compartment (vegetable
compartment 107) or peripheral parts.
[0529] Heat conduction deterioration due to void formed between
heat conducting pin cover 166 and cooling pin 134 inevitable owing
to the processing precision or assembling precision can be avoided
by filling void 196 with butyl or other heat conduction material,
and the heat conductivity is maintained and the cooling capacity is
assured. Void 196 formed between tape 194 and heat conducting pin
cover 166 can be similarly filled up.
[0530] By dew condensation on atomizing electrode 135 by these
cooling effects, high voltage discharge occurs between opposite
electrode 136 and atomizing electrode 135, and the generated fine
mist passes through atomizing port 132 formed in outlet wall 137 of
electrostatic atomizing device 131, and is atomized into vegetable
compartment 107 from atomizing port 192 provided in surface of
rear-end partition 151. Since the atomized mist is very small in
particle size, the diffusion is strong, and the fine mist reaches
all parts of vegetable compartment 107. The atomized fine mist is
generated by high voltage discharge, and is charged negatively.
Vegetable compartment 107 contains positively charged vegetables
and fruit. Therefore, the atomized mist is likely to deposit on the
surface of vegetables, and the freshness may be enhanced.
[0531] In the event of abnormal dew condensation occurring in
atomizing electrode 135, since humidity supplying port 138 is
opened in a lower part of atomizing electrode 135, and humidity
supplying port 193 is formed on its extension in surface of
rear-end partition 151, water is collected in mist generation
department 139, and abnormality will not occur.
[0532] Thus, in the preferred embodiment, in the configuration of
cooling pin 134 at protrusion 134a of mist generation department
139, through-section 165 is formed in heat insulator 152, and
cooling pin 134 is inserted in this position, and heat conducting
pin cover 166 is provided in the periphery. Void 196 between heat
conducting pin cover 166 and cooling pin 134, or void 196 between
tape 194 adhered to opening 167 of through-section 165 and cooling
pin 134 is filled up with void burying members. Hence, these voids
196 are eliminated, and heat conduction from cooling air duct or
cooling compartment 110 can be assured.
[0533] Tape 194 adhered to opening 167 of through-section 165 is
pressed by partition 161 for separating cooling compartment 110 and
outlet air-duct 141 for freezer compartment, and its peeling is
prevented, and the stability of quality is maintained. Cooling
capacity by heat conduction to atomizing electrode 135 and cooling
pin 134 can be also assured.
[0534] In the preferred embodiment, a buffer material may be
provided in the periphery of cooling pin 134. As a result, the gap
between through-section 165 and heat conducting pin cover 166 can
be narrowed, and escape of cold air can be prevented.
[0535] In the preferred embodiment, the air duct for cooling of
cooling pin 134 of heat conduction material is outlet air-duct 141
for freezer compartment, but the same role may be played by other
low-temperature air passage such as discharging air duct of
icemaker 106, or return air passage of freezer compartment 108. As
a result, the possible location for installing electrostatic
atomizing device 131 is extended.
[0536] In the preferred embodiment, the cooling section for cooling
of cooling pin 134 of heat conduction material is the cold air
cooled by using the cooling source generated in the freezing cycle
of refrigerator 100. But it may be also possible to use the heat
conduction from the cooling tube making use of cold air or low
temperature from the cooling source of refrigerator 100. As a
result, by adjusting the temperature of the cooling tube, cooling
pin 134 of heat conduction material may be cooled to a desired
temperature, and it is easy to manage the temperature when cooling
atomizing electrode 135 of the tip of the department mist.
Preferred Embodiment 10
[0537] A longitudinal sectional view showing a section where the
refrigerator of preferred embodiment 10 of the present invention is
divided and parted into right and left sections is nearly same as
FIG. 1. A front view of essential parts showing the inner side of
the vegetable compartment of the refrigerator in preferred
embodiment 10 of the present invention is same as FIG. 2. FIG. 14
shows a sectional view cut along line A-A in FIG. 2 as seen from
the arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment
10 of the present invention.
[0538] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 9 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
9 or applicable to the same technical concept are omitted in
explanation.
[0539] In the drawing, through-section 165 is provided in a part of
the wall at the inside of vegetable compartment 107 of rear
partition 111, and electrostatic atomizing device 131 installed in
this position.
[0540] Surface of rear-end partition 151 having electrostatic
atomizing device 131 has protrusion 191, and electrostatic
atomizing device 131 is enclosed between protrusion 191 of the
surface of rear-end partition 151 and heat insulator 152.
[0541] Cooling pin 134 of electrostatic atomizing device 131
surrounded by heat conducting pin cover 166 made of PS, PP or other
resin material having both heat insulating property and water-proof
property, and is fitted into through-section 165 of heat insulator
152.
[0542] At this time, heat conducting pin cover 166 is fitted
tightly to heat insulator 152 in the periphery, and when water
deposits on cooling pin 134, the water is prevented from sticking
to heat insulator 152, thereby avoiding permeation, freezing and
breaking in the inside of the heat insulator.
[0543] However, end portion 134b of cooling pin 134 is formed in a
cylindrical shape in heat conducting pin cover 166 to assure the
cooling capacity from the back side, and only end portion 134b of
cooling pin 134 is opened. Opening 167 of through-section 165 is
sealed with tape 194 such as aluminum tape adhered to heat
insulator 152, and cold air is shut off.
[0544] Herein, end portion 134b of cooling pin 134 is adhered to
tape 194, and the heat conductivity is maintained.
[0545] Heat conducting pin cover 166 may be an insulating tape
having heat insulation.
[0546] However, due to some dimensional error, void 196 may be
present somewhat between cooling pin 134 and heat conducting pin
cover 166. Hence, void 196 is filled up with void burying member
197d such as butyl or heat diffusion compound relatively excellent
in heat conduction, and such heat conduction holding member is
buried between cooling pin 134 and heat conducting pin cover
166.
[0547] In refrigerator 100 of the preferred embodiment having such
configuration, the operation and actions are explained below.
[0548] Cooling pin 134 is cooled by way of a cooling air duct, or
partition 161 for separating cooling compartment 110, tape 194, or
void burying member 197d, or from the heat insulator at the side of
cooling pin 134. When cooled indirectly in a dual structure by way
of tape 194, between heat conducting pin cover 166 and tape 194,
void 196 may be formed due to processing precision. If void 196 is
formed, the heat conduction is very poor in this space, and cooling
pin 134 may not be cooled sufficiently, and the temperature of
cooling pin 134 or the temperature of atomizing electrode 135 may
fluctuate, and dew condensation at the leading end of the atomizing
electrode may be disturbed.
[0549] To prevent this, when assembling, tape 194 and cooling ping
134 must be connected tightly. Considering a possibility of forming
void, it is required to fill up void 196 with heat conduction
holding member such as butyl or heat diffusion compound as void
burying member 197d. Thus, heat conduction from tape 194 to cooling
pin 134 is maintained, and the cooling capacity of atomizing
electrode 135 is assured.
[0550] There is no void between heat conducting pin cover 166 and
through-section 165, and opening 167 of through-section 165 is
sealed with tape 194, and invasion of cold air from the adjacent
cooling air duct is shut off, and low-temperature air does not leak
into the compartment. Hence, dew condensation or low temperature
abnormality will not occur in vegetable compartment 107 or
peripheral parts.
[0551] Heat conduction deterioration due to void formed between
heat conducting pin cover 166 and cooling pin 134 inevitable owing
to the processing precision or assembling precision can be avoided
by filling void 196 with butyl or other heat conduction material.
Hence, the heat conductivity is maintained and the cooling capacity
is assured. Void 196 formed between tape 194 and cooling pin 134
can be similarly filled up with butyl or other heat conduction
material applied in void 196.
[0552] Since heat conducting pin cover 166 and through-section 165
are formed without allowing gap, and the heat insulator made of
foamed styrol is prevented from containing water. Therefore, heat
insulator 152 is free from permeation of water, freezing of
permeation area, or cracking or breaking of the area due to water
volume expansion and stress, and hence the quality is assured.
[0553] Opening 167 of through-section 165 is sealed with tape 194
to shut off invasion of cold air from the adjacent cooling air
duct, low-temperature air does not leak into the compartment.
Therefore, vegetable compartment 107 and its peripheral parts are
free from dew condensation or low-temperature abnormality.
[0554] By dew condensation on atomizing electrode 135 by these
cooling effects, high voltage discharge occurs between opposite
electrode 136 and atomizing electrode 135, and a fine mist is
generated. The fine mist passes through atomizing port 132 formed
in outlet wall 137 of electrostatic atomizing device 131, and is
atomized into vegetable compartment 107 from atomizing port 192
provided in surface of rear-end partition 151. Since the atomized
mist is very small in particle size, the diffusion is strong, and
the fine mist reaches all parts in vegetable compartment 107. The
atomized fine mist is generated by high voltage discharge, and is
charged negatively. Vegetable compartment 107 contains positively
charged vegetables and fruit, and the atomized mist is likely to
deposit on the surface of vegetables, and the freshness may be
enhanced.
[0555] In the event of abnormal dew condensation occurring in
atomizing electrode 135, since humidity supplying port 138 is
opened in a lower part of atomizing electrode 135, and humidity
supplying port 193 is formed also on its extension in surface of
rear-end partition, water is collected in mist generation
department 139, and abnormality will not occur.
[0556] Thus, in the preferred embodiment, in the configuration of
heat conducting pin cover 166 of cooling pin 134 at protrusion 134a
of mist generation department 139, when through-section 165 of heat
insulator 152 is inserted into cooling pin 134, heat conducting pin
cover 166 is provided in the periphery of cooling pin 134, and it
is very tightly into through-section 165. The end portion 134b side
of cooling pin 134 of heat conducting pin cover 166 is opened, and
the void between the tape adhered to opening 167 of through-section
165 and cooling pin 134 is filled up with a heat conducting pin.
Hence, these voids are eliminated, and heat conduction from the
cooling air duct or the cooling compartment can be assured.
[0557] Hence, the cooling capacity by heat conduction to the
atomizing electrode and the cooling pin can be assured.
[0558] The tape adhered to opening 167 of through-section 165 is
pressed by partition 161 for separating cooling compartment 110 and
outlet air-duct 141 for freezer compartment, and its peeling is
prevented, and the stability of quality is maintained.
[0559] Since heat conducting pin cover 166 is pressed and fixed in
through-section 165, invasion of water into heat insulator 152 made
of foamed styrol is prevented, and cracking and breaking of the
heat insulator can be prevented.
[0560] A buffer material may be provided in the periphery of
cooling pin 134. As a result, the gap between through-section 165
and heat conducting pin cover 166 can be narrowed, and escape of
cold air can be prevented.
[0561] The foregoing explanation is about configuration of
atomizing mist into the storage compartment from the mist
generation department in a simple structure by cooling the mist
generation department indirectly by the cooling section by way of
the heat conduction material. In this configuration, however, the
mist atomizing may not be supplied stably, and water sump may be
formed in the compartment due to excessive atomizing. In
particular, in a refrigerator having a narrow sealed space, the
water may be collected or frozen by small temperature changes, and
adjustment of atomizing amount may be required. Corresponding to
the individual foregoing embodiments, the configuration for
adjusting the atomizing amount stably is explained below.
Preferred Embodiment 11
[0562] FIG. 15 shows a sectional view cut along line A-A in FIG. 2
as seen from arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment
11 of the present invention. In the preferred embodiment, in the
refrigerator in preferred embodiment 1, instead of the
electrostatic atomizing device shown in FIG. 3, the electrostatic
atomizing device shown in FIG. 15 is used.
[0563] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 10 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
10 or applicable to the same technical concept are omitted in
explanation.
[0564] In the electrostatic atomizing device shown in FIG. 15, same
as explained in preferred embodiment 1, heater 154 such as
partition heater is provided between surface of rear-end partition
151 fixing electrostatic atomizing device 131 and heat insulator
152, as means for regulating the temperature in the storage
compartment or preventing dew condensation on the surface. Further,
as means for regulating the temperature of cooling pin 134 of heat
conduction material provided in electrostatic atomizing device 131,
and preventing excessive dew condensation in the peripheral parts
including atomizing electrode 135 at the tip of the department
mist, heat conducting pin heater 158 is provide near mist
generation department 139.
[0565] The heat conduction material of the preferred embodiment,
that is, cooling pin 134 has protrusion 134a at the opposite side
of the atomizing electrode, and end portion 134b at the protrusion
134a side of the mist generation department is closest to the
cooling section. Hence, cooling pin 134 is cooled from the end
portion 134b side remotest from atomizing electrode 135 by the
adjusting section.
[0566] As a heat cushioning material, heat insulator 152 covers at
least the cooling section side of cooling pin 134, but preferably
the entire surface of protrusion 134a of the cooling pin should be
covered. In this case, heat invasion from a lateral direction
orthogonal to the longitudinal direction of cooling pin 134 is
decreased, and heat is conducted in the longitudinal direction from
the end portion 134b side of the protrusion 134a side. Hence,
cooling pin 134 is cooled from the end portion 134b side remotest
from atomizing electrode 135 by the adjusting section.
[0567] In such configuration, the operation for adjusting the water
quantity at the leading end of the atomizing electrode is explained
by referring to FIG. 16 and FIG. 17.
[0568] In FIG. 16, the axis of abscissas denotes the time, and the
axis of ordinates represents the discharge current monitor voltage
value. The discharge current monitor voltage value is set and
issued so that the voltage value may be lowered every time a
current flows between the electrodes, that is, on every occasion of
occurrence of discharge phenomenon and generation of fine mist.
[0569] In refrigerator 100, when the temperature of evaporator 112
begins to decline, that is, when the operation of the freezing
cycle starts, cooling of vegetable compartment 107 is also started.
As a result, a cold air begins to flow into vegetable compartment
107, and it is set in a dry state, and atomizing electrode 135 also
tends to be dry.
[0570] Next, when the refrigerator compartment damper (not shown)
is closed, the discharge air temperature in the refrigerator
compartment rises, and the temperature and humidity in refrigerator
compartment 104 and vegetable compartment 107 are elevated. At this
time, the freezer compartment discharged cold air temperature is
gradually lowered, and cooling pin 134 is further cooled, and
atomizing electrode 135 of mist generation department 139 installed
in vegetable compartment 107 changed to high humidity environment
is more like to condense dew. Liquid drops are grown at the leading
end of atomizing electrode 135, and when the distance between the
liquid drop leading end and opposite electrode 136 reaches a
specific distance, the air insulation layer is broken, and
discharge phenomenon start, and a fine mist is atomized from the
leading end of atomizing electrode 135. At this time, a small
current flows between the electrodes, and the discharge current
monitor voltage value declines as shown in the waveform in the
diagram. Later, compressor 109 is stopped, and cooling fan 113 is
stopped, and although the temperature of cooling pin 134 rises, the
atmosphere of mist generation department 139 continues to be high
in humidity, and mist-making continues.
[0571] However, when defrosting, that is, when melting and removing
frost and ice depositing on evaporator 112, the temperature of
evaporator 112 exceeds 0.degree. C. At this time, the temperature
of the discharging air duct from the freezer compartment at the
back side of the electrostatic atomizing device is also elevated,
and along with this temperature rise, cooling pin 134 is also
raised in temperature, and the temperature of atomizing electrode
135 also hikes, and the dew condensation water depositing on the
leading end is evaporated, and the atomizing electrode is
dried.
[0572] The defrosting heater is designed to be turned off when the
temperature of the evaporator rises to a certain extent.
Accordingly, the temperature of the electrode or the heat
conduction material is not raised excessively, and the temperature
rise of the electrode or the heat conduction material is controlled
within an appropriate range.
[0573] In the preferred embodiment, the heating section is provided
with not only the defrosting heater but also with heat conducting
pin heater 158, but without using heat conducting pin heater 158,
the heating section of the adjusting section may be formed only of
the defrosting heater. Hence, if excessive dew condensation occurs,
by adjusting with the timing of defrosting of the evaporator in
this manner, the atomizing electrode at the tip of the department
mist can be heated by way of the heat conduction material.
Therefore, without requiring any particular configuration,
excessive water drops may be removed easily. Without using any
particular motor as the adjusting section, by using the defrosting
heater provided in the freezing cycle, any particular device or
power supply is not needed. Thus, mist atomizing is realized while
saving material and saving energy. Also applicable to defrosting of
the evaporator, the reliability is further enhanced.
[0574] Considering a state of practical use of refrigerator 100,
depending on the operating environment, frequency of opening and
closing of door, or food storage state, the humidity state or
humidifying amount of vegetable compartment 107 varies, and the
amount of dew condensation on atomizing electrode 135 at the tip of
the department mist may become excessive. In a worst case, liquid
drops may increase so much as to cover the entire surface of
atomizing electrode 135, the electrostatic power by discharge may
not overcome the surface tension, and mist may not be formed.
Therefore, when the refrigerator compartment damper is opened, in
addition to dehumidifying effect by cold air, by supplying power to
heat conducting pin heater 158 in the heating section, the
atomizing electrode 135 is heated. As a result, evaporation of
depositing water drops is promoted, and excessive defrosting is
prevented, and the mist can be made continuously and stably. Due to
excessive dew condensation, it is possible to prevent growth of
liquid drops or deterioration of quality due to water dripping from
rear partition 111 or the like.
[0575] In this manner, atomizing electrode 135 utilizes the
freezing cycle of refrigerator 100, and repeats dew condensation
and drying as shown in FIG. 17, and atomizes mist continuously. As
a result, by adjusting the amount of water at the tip of the
department mist, continuous mist-making is realized while
preventing excessive dew condensation.
[0576] Thus, without cooling or heating atomizing electrode 135
directly, the temperature of atomizing electrode 135 can be
regulated indirectly by cooling or heating cooling pin 134 of heat
conduction material. Since heat conduction material 134 has a
larger thermal capacity than atomizing electrode 135, direct
effects of temperature changes of the regulating section on the
atomizing electrode can be lessened, and the temperature of the
atomizing electrode can be regulated. Therefore, suppressing load
fluctuations of the atomizing electrode, mist atomizing of a stable
atomizing amount is realized.
[0577] Opposite electrode 136 is provided at a position opposite to
atomizing electrode 135, and voltage applicator 133 for generating
a high voltage potential difference between atomizing electrode 135
and opposite electrode 136 is provided, and a stable electric field
can be built near atomizing electrode 135, and the pulverizing
phenomenon and the atomizing direction are determined, and the
precision of fine mist to be atomized into the storage container is
enhanced, and the precision of mist generation department 139 is
improved, and electrostatic atomizing device 131 of high
reliability is presented.
[0578] Cooling pin 134 of heat conduction material is cooled or
heated by way of a heat cushioning material, and atomizing
electrode 135 is indirectly changed in temperature by cooling pin
134, and also changed in temperature indirectly in a dual structure
by way of heat insulator 152 of heat cushioning material, and hence
extreme cooling of heating of atomizing electrode 135 may be
avoided. If atomizing electrode 135 is cooled extremely, the dew
condensation amount increases, and due to increase in the load to
mist generation department 139, increase of input to electrostatic
atomizing device 131 or defective mist making in mist generation
department 139 may be feared, but such defects due to increase of
load to mist generation department 139 may be prevented, and an
appropriate dew condensation amount may be assured, and a stable
mist atomizing at low input may be realized.
[0579] Or if atomizing electrode 135 is heated extremely, the
temperature of the voltage applicator or storage compartment around
the mist generation department may elevate suddenly, and troubles
due to breakage of electrical parts or cooling failure due to
temperature rise of the contained vegetables may occur. However,
such defects due to temperature rise of mist generation department
139 can be prevented, and an appropriate dew condensation amount
may be assured, and a stable mist atomizing at low input may be
realized.
[0580] Moreover, by regulating temperature of atomizing electrode
135 indirectly in a dual structure by way of heat conduction
material and heat cushioning material, direct effects of
temperature changes of the regulating section on the atomizing
electrode can be further lessened, and load fluctuations of the
atomizing electrode can be suppressed, and mist atomizing of a
stable atomizing amount is realized.
[0581] For temperature regulation of cooling pin 134 of heat
conduction material, cold air generated in cooling compartment 110
is used, and since cooling pin 134 is formed of a metal piece of
excellent heat conduction, the temperature regulating section is
capable of cooling as required only by heat conduction from the air
duct of flow of cold air generated in evaporator 112.
[0582] At this time, cooling pin 134 of heat conduction material of
the preferred embodiment is formed in a shape having protrusion
134a at the opposite side of the atomizing electrode, and in the
mist generation department, end portion 134b at the protrusion 134a
side is close to the cooling section, and cooling pin 134 is cooled
from end portion 134b remotest from atomizing electrode 135 by the
cold air from the cooling section.
[0583] For cooling of cooling pin 134 of heat conduction material,
cold air generated in cooling compartment 110 is used, and since
cooling pin 134 is formed of a metal piece of excellent heat
conduction, the cooling section is capable of cooling as required
only by heat conduction from the air duct of flow of cold air
generated in evaporator 112.
[0584] Since the cooling section can be composed in such simple
structure, a mist generation department of low trouble rate and
high reliability can be realized. Further, by making use of the
cooling source of the freezing cycle, cooling pin 134 of heat
conduction material, and atomizing electrode 135 at the tip of the
department mist can be cooled, and mist making at low energy is
realized.
[0585] At this time, in the mist generation department of the
preferred embodiment, cooling pin 134 of heat conduction material
is formed in a shape having protrusion 134a at the opposite side of
atomizing electrode 135, and in the mist generation department, end
portion 134b at the protrusion 134a side is close to the cooling
section, and cooling pin 134 is cooled from end portion 134b
remotest from atomizing electrode 135 by the cold air from the
cooling section.
[0586] Thus, the cooling section or the regulating section is
disposed at the end portion 134b remotest from atomizing electrode
135 of cooling pin 134, and direct effects of temperature changes
of the cooling section or the regulating section on atomizing
electrode 135 can be further lessened, and stable mist atomizing of
smaller load fluctuations can be realize, and the temperature of
the atomizing electrode can be regulated more stably.
[0587] Rear partition 111 having the mist generation department is
provided in protrusion 111a in a part of the storage compartment
side, and the mist generation department having protrusion 134a is
inserted into deepest recess 111b deeper than this recess 111a, and
heat insulator 152 composing the partition of the storage chamber
can be used as heat cushioning material, and the thickness of the
heat insulator can be adjusted without using any particular heat
cushioning material, and the heat cushioning material capable of
cooling the atomizing electrode properly may be obtained, and mist
generation department 139 can be realized in a simpler
structure.
[0588] By inserting mist generation department 139 into recess
111a, and cooling pin 134 having protrusion 134a into deepest
recess 111b the mist generation department can be installed in the
partition securely without allowing looseness in two-step
structure, projection toward the storage compartment, that is,
vegetable compartment 107 can be suppressed, and it is hardly
touched by the hand of the user, and the safety is enhanced.
[0589] Since mist generation department 139 does not project into
the outside enclosing rear partition 111 of storage compartment of
vegetable compartment 107, and there is no effect on the air duct
area, and lowering of cooling capacity by increase of air duct
resistance can be avoided.
[0590] A recess is formed in a part of vegetable compartment 107,
and mist generation department 139 is inserted in this place, and
the storage capacity for storing vegetables, fruit and food is not
changed, and the heat conduction material can be cooled securely,
and other parts are sufficient in wall thickness for assuring heat
resistance, and dew condensation in the shell is prevented, and the
reliability can be enhanced.
[0591] Cooling pin 134 of heat conduction material maintains a
certain thermal capacity, and can lessen the response of heat
conduction from the cooling air duct, and can suppress temperature
fluctuations of the atomizing electrode, and also has a function of
cold reserve member, and the occurrence time of dew condensation of
the atomizing electrode is assured, and freezing can be prevented.
When cooling pin 134 of heat conduction material is combined with
the heat insulator, the cold heat can be transmitted without loss.
Since heat resistance is suppressed at the junction of cooling pin
134 and atomizing electrode 135, the temperature fluctuations of
atomizing electrode 135 and cooling pin 134 follow up smoothly.
Since humidity cannot invade into the junction, a thermal bond can
be maintained for a long period.
[0592] Since the storage compartment is in high humidity
environment, and its humidity may have effects on cooling pin 134,
cooling pin 134 is made of corrosion-resistant and rust-preventive
metal material, or coated with alumite or other surface treatment,
it is free from rusting, and the increase of surface heat
resistance is suppressed, and a stable heat conduction is
assured.
[0593] Moreover, the surface of atomizing electrode 135 is plated
with nickel, plated with gold, or plated with platinum, and
abrasion of the atomizing electrode leading end due to discharge
can be suppressed, and the leading end shape of atomizing electrode
135 is maintained, and atomizing for a long period is guaranteed,
and the liquid drop shape at the leading end is stable.
[0594] When a fine mist is atomized from atomizing electrode 135,
an ion wind is generated. At this time, a fresh air of high
humidity flows into mist generation department 139 from humidity
supplying port 138, and therefore the mist can be atomized
continuously.
[0595] Herein, if there is no water in atomizing electrode 135, the
discharge distance is long, and the insulation layer of air cannot
be broken, and discharge phenomenon does not take place. As a
result, current does not flow between the atomizing electrode and
the opposite electrode. When this phenomenon is detected by
controller 146 in refrigerator 100, and the high voltage of voltage
applicator 133 may be turned on or off.
[0596] FIG. 18 is a function block diagram showing an example of
this preferred embodiment.
[0597] Discharge current monitor voltage value 231 issued from
electrostatic atomizing device 131, and signals from atomizing
electrode temperature detector 232 and door closing detector 233
are applied into controller 235 in the refrigerator main body, and
the operation of voltage applicator 133 for applying a high voltage
of electrostatic atomizing device 131, heater (partition heater)
154, and heat conducting pin heater 158 is determined. For example,
if the atomizing electrode temperature is judged to be lower than
the dew point by atomizing electrode temperature detector 232 in
controller 235, a high voltage of the voltage applicator of
electrostatic atomizing device 131 is generated. If assuming a
temperature having possibility of freezing of atomizing electrode
135, a very high humidity in vegetable compartment 107 due to
frequent opening and closing of door, or an excessive dew
condensation state of atomizing electrode 135, power is supplied
into heater (partition heater) 154, or heat conducting pin heater
158 to start heating, and the dew condensation water depositing on
the surface of atomizing electrode 135 is thawed and evaporation,
and the water quantity in atomizing electrode 135 is adjusted.
[0598] Although atomizing electrode temperature detector 232 is
used, this temperature detector may not be required if the
temperature behavior can be estimated easily from the freezing
cycle of refrigerator 100. Besides, since the humidity in the
storage compartment fluctuates due to behavior of refrigerator
compartment damper 234, voltage applicator 133 may be turned or off
in cooperation with refrigerator compartment damper 234.
[0599] Refrigerator compartment damper 234 in the preferred
embodiment may be replaced by a vegetable compartment damper.
[0600] FIG. 19 explains a control flow in an example of the
preferred embodiment.
[0601] To control the temperature of atomizing electrode 135, the
temperature of the atomizing electrode is judged. At step S250,
when getting into the atomizing electrode temperature regulating
mode, at step S251, if atomizing electrode temperature Tf is higher
than preliminarily programmed first value T1 (for example,
T1=6.degree. C.), atomizing electrode 135 is high in temperature,
and dew is not condensed. Or if the compartment temperature is
judged to be high, going to step S252, the high voltage generation
of electrostatic atomizing device 131 is stopped, and cooling pin
134 is heated by, for example, stopping power feeding to heat
conducting pin heater 158. If atomizing electrode temperature Tf is
lower than preliminarily programmed first value T1, the process
goes to step S253. At step S253, if atomizing electrode temperature
Tf is higher than preliminarily programmed second value T2 (for
example, T2=-6.degree. C.), atomizing electrode 135 is judged to be
at an appropriate temperature, and going to step S254, the high
voltage generation of electrostatic atomizing device 131 is
generated. However, the operation for heating section of cooling
pin 134 is not started. If atomizing electrode temperature Tf is
lower than preliminarily programmed second value T2, the process
goes to step S255. At step S255, if atomizing electrode temperature
Tf is higher than preliminarily programmed third value T3 (for
example, T2=-10.degree. C.), atomizing electrode 135 is judged to
be in overcooled state, and the process goes to step S256. At step
S256. discharge of atomizing electrode 135 is maintained, but in
order to prevent freezing, the heaters are operated, such as heat
conducting pin heater 158, and heater (partition heater) 154. At
step 255, if atomizing electrode temperature Tf is judged to be
lower than T3, it is judged that the atomizing electrode is frozen,
and the discharge is stopped, and the heaters such as heat
conducting pin heater 158 and heater (partition heater) 154 are
operated, and atomizing electrode 135 is heated and raised in
temperature, and the frost or ice depositing on atomizing electrode
135 is thawed by priority.
[0602] After step S252, step S254, step S256, and step S257, by
lapse of a certain time, the process returns to initial step S251,
and the control is continued, and the water quantity in atomizing
electrode 135 is regulated.
[0603] In this manner, the preferred embodiment includes the
storage compartments thermally isolated by partitions, and the mist
generation department for atomizing mist into the storage
compartment, and the mist generation department is composed of a
tip of the department mist for atomizing mist into the storage
compartment, a voltage applicator for applying a voltage to the tip
of the department mist, and a heat conduction material coupled to
the tip of the department mist, and by cooling the tip of the
department mist lower than the dew point by the evaporator,
moisture in the air cooled to condense dew on the tip of the
department mist, and mist is atomized into the storage compartment,
and the atomizing amount is adjusted by the regulating section for
regulating the water quantity depositing on the tip of the
department mist.
[0604] In such configuration, dew can be condensed securely on the
atomizing electrode easily from the excessive steam in the storage
compartment, and by regulating the water quantity at the leading
end of the atomizing electrode, corona discharge occurs between the
atomizing electrode and the opposite electrode stably and
continuously. As a result, fine mist of nano level is generated,
and the atomized fine mist uniformly deposits on the surface of
vegetables and fruit, and transpiration from vegetables and fruit
can be suppressed, and the freshness is enhanced. From the cell
gaps and pores on the surface of vegetables and fruit, moisture
permeates into cells and is supplied into withered cells, and the
vegetables may be returned to a fresh state.
[0605] Moreover, since discharge occurs between the atomizing
electrode and the opposite electrode, an electric field is built up
stably, and the atomizing direction is determined, and a fine mist
can be atomized more precisely into the storage container.
[0606] Ozone and OH radicals generated simultaneously with the mist
are also useful for enhancing the effects of deodorizing, removing
of harmful substances on the food surface, and preventing
contamination.
[0607] The atomized mist can be directly applied to the foods in
the storage container, and the mist can be adhered to the surface
of vegetables by making use of the potential of the mist and
vegetables, and the efficiency of keeping-fresh performance is
enhanced, and the effects of deodorizing, removing of harmful
substances on the food surface, and preventing contamination are
further enhanced.
[0608] Besides, dew is condensed on the atomizing electrode from
the excessive steam in the storage compartment, and water drops are
collected, and a mist is atomized, and it requires no extra
components, such as defrosting hose for supplying water for mist
atomizing, purifying filter, water supply route to be coupled
directly to water service, or water storage tank. Any pump,
capillary or water supplying part is not used, and a fine mist can
be supplied into the storage compartment in a simple structure
without requiring complicated mechanism.
[0609] In this way, and in such a simple structure, a fine mist can
be supplied stably into the storage compartment, and the risk of
troubles of the refrigerator can be substantially lowered, and the
reliability is enhanced, and the quality of the refrigerator is
improved.
[0610] Instead of tap water, water from dew condensation is used,
and it is free from minerals and impurities, and it is effective to
prevent deterioration when a water retaining material is used or
deterioration of water retaining material due to clogging.
[0611] Further, since mist is not atomized by ultrasonic waves by
ultrasonic vibration, no consideration is necessary about breakage
of piezoelectric element due to lack of water, or deformation of
peripheral parts, and water tank is not needed, and the input is
small, and temperature effects are small in the compartment.
[0612] The portion accommodating the voltage applicator is buried
in rear partition 111, and is cooled, and the temperature rise of
the circuit board can be suppressed. As a result, temperature
effects in the storage compartment can be lowered, and the
reliability of the circuit board is enhanced at the same time.
[0613] In the preferred embodiment, a partition is provided for
thermally insulating the storage compartment, and the electrostatic
atomizing device is built in the partition, and since it is
installed in the gap in the storage compartment, the storage volume
is not decreased, and since it is installed at the inner side, it
is not easily touched by the hand of the user, and the safety is
enhanced.
[0614] In the preferred embodiment, the regulating unit for cooling
and heating of the atomizing electrode of the electrostatic
atomizing device, or regulating the dew condensation amount at the
atomizing electrode leading end is a cooling pin made of heat
conductive metal pin, and the heating unit for cooling and heating
the metal piece is a heating section of heater and heat conduction
from air duct of flow of cold air generated in the evaporator, and
only by adjusting the wall thickness of the heat insulator and the
heater input value, the temperature of the cooling pin and the
atomizing electrode can be determined easily. By enclosing the heat
insulator, the cold air does not leak, and the heater and other
heating units are provided, and frosting or dew condensation on the
outlet wall can be prevented, and lowering of reliability can be
prevented.
[0615] In the preferred embodiment, rear partition 111 having the
electrostatic atomizing device has a recess formed in a part of the
storage compartment, and a metal piece as water volume regulating
part of the electrostatic atomizing device is inserted in this
place, and without changing the storage capacity for storing
vegetables, fruit and food, an enough wall thickness for keeping
heat insulation is assured in other parts than mounting the
electrostatic atomizing device, and dew condensation in the outlet
wall can be prevented, and the reliability is enhanced.
[0616] In the preferred embodiment, the partition for thermally
separating the evaporator and the storage compartment is provided
at least with an air duct for conveying cold air into the storage
compartment or the evaporator, and a heater insulator insulated
from heat effects from the storage compartment or other air duct,
and the portion for varying the temperature of the atomizing
electrode in the electrostatic atomizing device is a metal piece of
heat conduction material, and the portion for regulating the
temperature of this metal piece is cold air generated in the
evaporator and a heater or other heating unit, so that the
temperature of the atomizing electrode can be regulated
securely.
[0617] Further, to prevent excessive dew condensation on the
leading end of the atomizing electrode, as a part of water quantity
regulating means, heater or other heating unit is provided, and the
size and amount of leading end liquid drops can be adjusted by the
temperature control of the leading end temperature, and mist can be
atomized stably, and the antibacterial capacity is further
enhanced.
[0618] When generating a fine mist, traces of ozone are generated,
but since the discharge current value is extremely small, and
moreover since the reference potential is 0 V, and the opposite
electrode is discharge at a plus side of +7 kV, the concentration
is far less than felt by the human body. By on/of operation of the
electrostatic atomizing device, the ozone concentration in the
storage compartment can be adjusted, and the concentration can be
appropriately adjusted, and yellowing or deterioration of
vegetables by excessive ozone can be prevented, and the
bactericidal and antibacterial action on the vegetable surface can
be enhanced.
[0619] In the preferred embodiment, in the atomizing electrode, a
high voltage potential difference is generated between the
reference potential side (0 V) and the opposite electrode (+7 kV),
but a high voltage potential difference may be generated by
applying -7 kV to the atomizing electrode with the opposite
electrode at reference potential side (0 V). In this case, the
opposite electrode closer to the storage compartment is at the
reference potential side, and electric shock does not occur if the
user comes closer to the opposite electrode. When the atomizing
electrode is set at -7 kV, the opposite electrode may not be
particularly necessary if the storage compartment side is at the
reference potential side.
[0620] In the preferred embodiment, the air duct for cooling the
cooling pin is the discharging air duct from the freezer
compartment, but it may be also replaced by the discharging air
duct from icemaker, returning air duct from the freezer
compartment, or other cooling air duct. As a result, the possible
location for installing the electrostatic atomizing device may be
extended.
[0621] In the preferred embodiment, the cooling section for cooling
the cooling pin of heat conduction material is the cold air cooled
by using the cooling source generated in the freezing cycle of the
refrigerator, but it is also possible to make use of heat
conduction from the cold air from the cooling source of the
refrigerator, or from the cooling tube of low temperature. Hence,
by regulating the temperature of this cooling tube, the electrode
cooling unit can be cooled to a desired temperature, and it is easy
to manage the temperature when cooling the atomizing electrode.
[0622] In the preferred embodiment, water retaining material is not
provided around the atomizing electrode of the electrostatic
atomizing device, but water retaining material may be also
provided. As a result, the dew condensation water generated near
the atomizing electrode can be maintained around the atomizing
electrode, and can be appropriately supplied into the atomizing
electrode.
[0623] In the preferred embodiment, the storage compartment of the
refrigerator is the vegetable compartment, but it may be also
replaced by the refrigerator compartment or the switchable
temperature compartment in other temperature zone, and various
applications may be possible.
[0624] In the preferred embodiment, the cooling pin is used, but it
is not limited as far as it is a heat conduction material, and for
example a high polymer material of high heat conduction property
may be used. In this case, the weight is reduced, and the
processability is improved, and the configuration is
inexpensive.
Preferred Embodiment 12
[0625] FIG. 20 shows a sectional view cut along line A-A in FIG. 2
as seen from arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment
12 of the present invention. In the preferred embodiment, in the
refrigerator in preferred embodiment 2, instead of the
electrostatic atomizing device shown in FIG. 4, the electrostatic
atomizing device shown in FIG. 20 is used.
[0626] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 11 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
11 or applicable to the same technical concept are omitted in
explanation.
[0627] In the electrostatic atomizing device of the preferred
embodiment shown in FIG. 20, in addition to the configuration
explained in preferred embodiment 2, near mist generation
department 139 of electrostatic atomizing device 131, atomizing
electrode 135 at the tip of the department mist, and heat
conducting pin heater 158 as the heating unit for regulating the
temperature of cooling pin 134 are composed.
[0628] Preferably, cooling pin 134 is made of corrosion-resistant
and rust-preventive metal material, or coated material with alumite
or other surface treatment.
[0629] Cooling pin 134 is partially exposed to low-temperature air
duct 156 at its back side. By the operation of the freezing cycle,
cooling pin 134 is cooled to about 0 to -6.degree. C. by the cold
air at low temperature generated in evaporator 112 and from the
vegetable compartment by cooling fan 113, and heating unit such as
heat conducting pin heater 158 or heater (partition heater) 154. At
this time, since cooling pin 134 is a heat conduction material,
cold heat is transmitted smoothly, and atomizing electrode 135 is
regulated to about 0 to -6.degree. C.
[0630] Thus, in the preferred embodiment, a heat insulator is
provided in the partition for thermally separating the evaporator
and the storage compartment, and the section for regulating the
temperature of atomizing electrode 135 of the electrostatic
atomizing device to less than the dew point is cooling pin 134 of
heat conduction material made of metal piece of high heat
conductivity, and the regulating section for regulating the
temperature of cooling pin 134 is the evaporator by cold air
generated in the evaporator and the heater provided near the
cooling pin, so that the temperature of the atomizing electrode can
be regulated securely.
[0631] In the preferred embodiment, the partition having the
electrostatic atomizing device has a recess in a part of the
storage compartment side, and a metal piece of the cooling section
of the electrostatic atomizing device is inserted in this place,
and the metal piece can be cooled securely. As the air duct area is
widened gradually, the air duct resistance is decreased, or becomes
equivalent, and lowering of cooling capacity is prevented.
Moreover, the temperature of the atomizing electrode can be
adjusted easily by the exposed surface area of the cooling pin into
the air duct and the heater input capacity.
[0632] In the preferred embodiment, the cooling pin is installed in
the recess in the air duct, but the recess may not be provided at
the air duct side as far as an appropriate temperature of the
cooling pin can be maintained. In this case, the air duct may be
processed easily.
Preferred Embodiment 13
[0633] FIG. 21 shows a sectional view cut along line A-A in FIG. 2
as seen from arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment
13 of the present invention. In the preferred embodiment, in the
refrigerator in preferred embodiment 3, instead of the
electrostatic atomizing device shown in FIG. 5, the electrostatic
atomizing device shown in FIG. 21 is used.
[0634] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 12 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
12 or applicable to the same technical concept are omitted in
explanation.
[0635] In the electrostatic atomizing device shown in FIG. 21, same
explained in preferred embodiment 3, electrostatic atomizing device
131 as a mist maker is assembled in first partition 123 for
thermally insulating for separating the temperature zone between
vegetable compartment 107 and icemaker 106. Also in this preferred
embodiment, in cooling pin section 134 of heat conduction material
of mist generation department 139, in particular, a recess is
formed in the heat insulator, and heat conducting pin heater 158 is
formed in its vicinity.
[0636] The basic operation is same as in preferred embodiment 3. In
this preferred embodiment, however, the temperature control of
icemaker 106 may vary and atomizing electrode 135 may be overcooled
due to ambient temperature fluctuations or icing, the temperature
of atomizing electrode 135 is regulated by heat conducting pin
heater 158 installed near atomizing electrode 135, and the water
quantity at the leading end of atomizing electrode 135 may be kept
appropriately.
Preferred Embodiment 14
[0637] FIG. 22 shows a sectional view cut along line A-A in FIG. 2
as seen from arrow direction of the cut-section, illustrating an
electrostatic atomizing device and its periphery provided in the
vegetable compartment of the refrigerator in preferred embodiment
14 of the present invention.
[0638] In the preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 13 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
13 or applicable to the same technical concept are omitted in
explanation.
[0639] In the drawing, rear partition 111 is composed of rear-end
partition 151 composed of ABS or other resin, and heat insulator
152 composed of foamed styrol or the like for thermally isolating.
Partition 401 is provided for isolating low-temperature air duct
156 and cooling compartment 110. Recess 111a is provided in a part
of the wall of the inside of the storage compartment of rear
partition 111 so as to be lower in temperature than in other parts,
and electrostatic atomizing device 131 is placed as mist maker.
[0640] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139, voltage applicator 133, and outlet
wall 137, and atomizing port 132 and humidity supplying port 138
are formed in a part of outlet wall 137. Mist generation department
139 is provided with atomizing electrode 135 as the tip of the
department mist, and atomizing electrode 135 is fixed by fixing
part on mist-making electrode side 202a made of heat conduction
material.
[0641] At the back side of fixing part on mist-making electrode
side 202a, through-section 111c is provided, and is close to one
side of Peltier module 222 including a Peltier element for
regulating the temperature of atomizing electrode 135. Other side
of Peltier module 222 is adjacent to heat conduction part on
air-duct side 222a made of heat conduction material, and heat
exchanging part 222b is composed on heat conduction part on
air-duct side 222a, and is provided in through-section 111c.
[0642] In the refrigerator having such configuration, the operation
and actions are described below. Low-temperature air duct 156 at
the back side of atomizing electrode 135 generates a cold air in
evaporator 112 by operation of the refrigerating cycle, and the
cold air is conveyed into the low-temperature air duct. At this
time, when a voltage is applied to Peltier module 222 including a
Peltier element, the atomizing electrode can be related below the
dew point depending on the direction of application and the applied
voltage value. For example, when cooling of atomizing electrode 135
is needed, the heat absorbing surface of Peltier module 222 is set
at the atomizing electrode side, and the discharge surface is set
at the air duct side, and a voltage is applied. To the contrary,
when heating is needed in atomizing electrode 135, the heat
absorbing surface of Peltier module 222 is set at the air duct
side, and the discharge surface is set at the atomizing electrode
135 side, and a voltage is applied. As a result, water may be
appropriately maintained at the leading end of atomizing electrode
135, and a stable mist atomizing is realized.
[0643] Thus, in the preferred embodiment, the section for
regulating the quantity of water depositing on the atomizing
electrode of the electrostatic atomizing device is capable of
regulating the temperature of the atomizing electrode only by
applying a voltage to the Peltier element by using the Peltier
element, and by inverting the voltage, both cooling and heating can
be realized, and any additional heater or the like is not
necessary.
[0644] In the preferred embodiment, by fine adjustment of applied
voltage to Peltier module 222, the temperature can be controlled
delicately, and the water quantity at the leading end of the
atomizing electrode can be controlled delicately.
[0645] In the preferred embodiment, Peltier module 222 plays the
both part of heater and evaporator, and any particular heater is
not needed, and the number of components may be saved.
[0646] In the preferred embodiment, temperature sensor or humidity
sensor are not provided near the mist generation department, but
when provided, stricter control is possible, and stable atomizing
may be realized.
[0647] Heat conduction part on air-duct side 222a and heat
exchanging part 222b may be formed integrally. As a result, the
contact heat resistance between the two members is eliminated, and
the heat conduction is smooth, and the response is improved.
[0648] Further, atomizing electrode 135 and the fixing part on
mist-making electrode side may be formed integrally. As a result,
the contact heat resistance between the two members is eliminated,
and the heat conduction is smooth, and the response is
improved.
[0649] Thus, only by the applied voltage to the Peltier element,
the temperature of the atomizing electrode can be regulated, and an
arbitrary temperature can be adjusted in the atomizing electrode
alone.
[0650] Only by inverting the voltage, both cooling and heating can
be realized, and without adding extra device for cooling or
heating, both cooling and heating can be realized in a simple
structure, and the temperature response is fast, and the response
of water quantity regulating section is enhance, and an arbitrary
temperature can be regulated, and the precision of the mist
generation department may be further enhanced.
Preferred Embodiment 15
[0651] FIG. 21 shows a detailed sectional view near the
electrostatic atomizing device in preferred embodiment 15 of the
present invention.
[0652] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 14 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
14 or applicable to the same technical concept are omitted in
explanation.
[0653] In the drawing, the mist maker or electrostatic atomizing
device 131 is mainly composed of mist generation department 139,
voltage applicator 133, and outlet wall 137, and atomizing port 132
and humidity supplying port 138 are formed in a part of outlet wall
137. Mist generation department 139 has atomizing electrode 135 as
tip of the department mist fixed in outlet wall 137, and atomizing
electrode 135 is provided with cooling pin 134 as heat conduction
material. In the vicinity, heat conducting pin heater 158 is
composed as a heating unit for regulating the temperature of
atomizing electrode 135. At a position opposite to atomizing
electrode 135, opposite electrode 136 of circular doughnut shape is
provided at the storage compartment side at a specific distance
from the leading end of atomizing electrode 135, and atomizing port
132 is provided on its extension.
[0654] At the back side of electrostatic atomizing device 131,
evaporator 112 is provided adjacently for cooling the storage
compartment, and electrostatic atomizing device 131 is fixed in
recess 111a of rear partition 111.
[0655] Thus, in this preferred embodiment, the regulating unit of
water quantity for condensing dew in atomizing electrode 135 at the
tip of the department mist of the electrostatic atomizing device as
the mist maker makes use of evaporator 112 for cooling the storage
compartment a s cooling unit, and the heat exchanger as a heating
unit. Therefore, the tip of the department mist (atomizing
electrode 135) can be directly cooled by evaporator 112 as cooling
source of the refrigerator, and the temperature response is
faster.
[0656] In this way, the temperature regulating unit is used in the
freezing cycle, and the temperature of the heat conduction material
and the atomizing electrode can be regulated, and the temperature
of the atomizing electrode can be regulated at a lower energy.
[0657] Since the heat exchanger is used as the heating unit of the
regulating section, the energy generated in the freezing cycle can
be collected and utilized effectively, and the thermal efficiency
of the freezing cycle is enhanced, and an energy-saving
refrigerator can be presented.
[0658] Also in the preferred embodiment, in the freezing cycle, an
expansion valve may be used for regulating the temperature of the
evaporator. As a result, the temperature of the evaporator can be
regulated by its throttling amount.
Preferred Embodiment 16
[0659] FIG. 24 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 16 of the present invention. In the preferred
embodiment, in the refrigerator in preferred embodiment 4, instead
of the electrostatic atomizing device shown in FIG. 5, the
electrostatic atomizing device shown in FIG. 24 is used.
[0660] In this preferred embodiment, the configuration is same as
in preferred embodiment 4, and similar effects are obtained.
Further as shown in FIG. 24, near cooling pin 134, heat conducting
pin heater 158 is provided for regulating the temperature of
cooling pin 134.
[0661] In the preferred embodiment, since cooling pin 134 is cooled
by way of a heat insulator of heat cushioning material, atomizing
electrode 135 is cooled indirectly by cooling pin 134 of heat
conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
[0662] When cooling by such cooling unit, by cooling from the side
of end portion 134b remotest from atomizing electrode 135 of
cooling pin 134 of heat conduction material, the large thermal
capacity of cooling pin 134 is first cooled, and then atomizing
electrode 135 is cooled by cooling pin 134, and direct effects of
temperature changes in the cooling unit on atomizing electrode 135
can be further lessened, and load fluctuations are small, and a
stable mist atomizing is realized.
Preferred Embodiment 17
[0663] FIG. 25 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 17 of the present invention.
[0664] In this preferred embodiment, in the refrigerator in
preferred embodiment 5, instead of the electrostatic atomizing
device shown in FIG. 7, the electrostatic atomizing device shown in
FIG. 25 is used. In the preferred embodiment, the configuration is
same as in preferred embodiment 5 shown in FIG. 7, and similar
effects are obtained. Further as shown in FIG. 25, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0665] In the preferred embodiment, too, since cooling pin 134 is
cooled by way of a heat insulator of heat cushioning material,
atomizing electrode 135 is cooled indirectly by cooling pin 134 of
heat conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
Preferred Embodiment 18
[0666] FIG. 26 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 18 of the present invention.
[0667] In this preferred embodiment, in the refrigerator in
preferred embodiment 6, instead of the electrostatic atomizing
device shown in FIG. 8, the electrostatic atomizing device shown in
FIG. 26 is used. In the preferred embodiment, the configuration is
same as in preferred embodiment 6 shown in FIG. 8, and similar
effects are obtained. Further as shown in FIG. 26, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0668] Cooling pin 134 of heat conduction material in the preferred
embodiment has protrusion 134a at the opposite side of the
atomizing electrode, and end portion 134b at the protrusion 134a
side is closest to the cooling unit in the mist generation
department. Hence the end portion 134b side remotest from atomizing
electrode 135 in cooling pin 134 is cooled by the cold air from the
cooling unit.
[0669] In the preferred embodiment, too, since cooling pin 134 is
cooled by way of a heat insulator of heat cushioning material,
atomizing electrode 135 is cooled indirectly by cooling pin 134 of
heat conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
Preferred Embodiment 19
[0670] FIG. 27 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 19 of the present invention.
[0671] In this preferred embodiment, in the refrigerator in
preferred embodiment 7, instead of the electrostatic atomizing
device shown in FIG. 9, the electrostatic atomizing device shown in
FIG. 27 is used. In the preferred embodiment, the configuration is
same as in preferred embodiment 7 shown in FIG. 9, and similar
effects are obtained. Further as shown in FIG. 27, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0672] In the preferred embodiment, too, since cooling pin 134 is
cooled by way of a heat insulator of heat cushioning material,
atomizing electrode 135 is cooled indirectly by cooling pin 134 of
heat conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
Preferred Embodiment 20
[0673] FIG. 28 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 20 of the present invention.
[0674] In this preferred embodiment, in the refrigerator in
preferred embodiment 8, instead of the electrostatic atomizing
device shown in FIG. 12, the electrostatic atomizing device shown
in FIG. 28 is used. In the preferred embodiment, the configuration
is same as in preferred embodiment 8 shown in FIG. 12, and similar
effects are obtained. Further as shown in FIG. 28, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0675] In the preferred embodiment, too, since cooling pin 134 is
cooled by way of a heat insulator of heat cushioning material,
atomizing electrode 135 is cooled indirectly by cooling pin 134 of
heat conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
Preferred Embodiment 21
[0676] FIG. 29 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 21 of the present invention.
[0677] In this preferred embodiment, in the refrigerator in
preferred embodiment 9, instead of the electrostatic atomizing
device shown in FIG. 13, the electrostatic atomizing device shown
in FIG. 29 is used. In the preferred embodiment, the configuration
is same as in preferred embodiment 9 shown in FIG. 13, and similar
effects are obtained. Further as shown in FIG. 29, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0678] By referring to the time charts shown in FIG. 30 to FIG. 33,
the operations of electrostatic atomizing device 131 and heat
conducting pin heater 158 in the preferred embodiment are explained
below, including the operations of the refrigerator.
[0679] Usually, in refrigerator 100, when the compartment
temperature in freezer compartment 108 or refrigerator compartment
104 rises higher than a specified temperature, the operation of
compressor 109 is started for cooling each compartment (point A in
FIG. 30). At this time, for cooling and temperature regulation of
refrigerator compartment 104, the closed refrigerator compartment
damper is opened, and cooling is started in refrigerator
compartment 104 and in vegetable compartment 107 at the downstream
side of its air ducts. A cold air flows into the storage
compartments by way of these air ducts, and the storage
compartments are relatively controlled at a low humidity. Herein,
to prevent freezing and to promote drying of atomizing electrode
135 of electrostatic atomizing device 131, a heater input is
applied to heat conducting pin heater 158 while the refrigerator
compartment damper is being opened. That is, while a cold air is
flowing into the vegetable compartment, it is controlled to promote
drying.
[0680] Consequently, when refrigerator compartment 104 is cooled to
a specified temperature, the refrigerator compartment damper is
closed, and cold air no longer flows into vegetable compartment
107. As a result, the storage compartment humidity in vegetable
compartment 107 begins to rise, and the input to heat conducting
pin heater 158 is stopped, and the operation is changed to the dew
condensation and atomizing mode of atomizing electrode 135 (point B
in FIG. 30). At this time, to generate a fine mist, voltage
applicator 133 of electrostatic atomizing device 131 is turned on
to apply a high voltage. In consequence, atomizing electrode 135 is
cooled, and the humidity elevates around atomizing electrode 135,
and then dew begins to condense on the leading end of the atomizing
electrode. When dew condensation grows to a certain extent, fine
mist of nano level is generated by high voltage discharge between
opposite electrode 136 and atomizing electrode 135, and is atomized
into the storage compartment. That is, while flow of cold air into
the vegetable compartment is being stopped, it is controlled to
condense dew by the atomizing electrode.
[0681] Afterwards, when freezer compartment 108 is cooled to a
specified temperature, compressor 109 is stopped (point C in FIG.
30), and cooling is stopped, and the temperature of evaporator 112
begins to rise. As a result, the humidity in the vegetable
compartment is elevated, and the environment is more likely to make
mist. At this time, since cooling pin 134 has a certain thermal
capacity, the temperature does not hike sharply, but a cooled state
is maintained. Therefore, atomizing electrode 135 is successively
cooled, and dew is condensed at the leading end of the atomizing
electrode, and the mist can be atomized.
[0682] Again, freezer compartment 108 and refrigerator compartment
104 become higher than a specified temperature, the operation of
compressor 109 is started again (point A in FIG. 30). At this time,
right after start of operation of compressor 109, the dew
condensation water is still present at the leading end of the
atomizing electrode, and is not dried quickly, and for a portion of
time .DELTA.t1 from point A, for example, 3 minutes to 10 minutes,
application of high voltage by voltage applicator 133 is continued.
As a result, the atomizing time can be extended, and the freshness
is enhanced.
[0683] As shown in FIG. 31, right after transfer from drying mode
to dew condensation and atomizing mode, water is rarely present at
the leading end of the atomizing electrode, by delaying the start
of application of high voltage by a portion of time .DELTA.t2 from
point B, for example, about 5 minutes to 10 minutes (point E), the
mist can be atomized after sufficient dew condensation, so that the
mist can be atomized efficiently, and the energy is saved at the
same time.
[0684] However, if the ambient temperature of the refrigerator is
low, by opening the refrigerator compartment damper, the cooling
time of the refrigerator compartment is very short.
[0685] Accordingly, if the ambient temperature is lower than a
specific temperature, or if the load of refrigerator compartment
104 is relatively small, it is hard to dry atomizing electrode 135
only by interlocking with the damper. However, the operation of
heat conducting pin heater 158 is not interlocked with the
refrigerator compartment damper as shown in FIG. 30, but is
interlocked with compressor 109 as shown in FIG. 32, so that the
heating time of heat conducting pin heater 158 is assured, thereby
preventing freezing and promoting drying of atomizing electrode
135. Accordingly, for application of high voltage by voltage
applicator 133 for condensing dew on the electrode and atomizing
mist, the power is supplied while compressor 109 is stopped, and a
high voltage is applied between atomizing electrode 135 and
opposite electrode 136. However, as explained in FIG. 30,
application of high voltage is continued from point A to point D.
As a result, a stable mist can be atomized even in low temperature
environment.
[0686] Further, as shown in FIG. 33, if there is a sufficient
allowance for the input of heat conducting pin heater 158, in order
to assure the cooling time of the atomizing electrode, the heating
capacity of the heater is increased more than usual for a period of
.DELTA.t3 time (from point A to point F) after start of operation
of compressor 109, and prevention of freezing and promotion of
drying can be executed powerfully. As a result, the drying time can
be shortened. Hence, the entire time after stopping of the heater
can be utilized for cooling, and dew is likely to deposit on the
atomizing electrode leading end, and the mist atomizing time is
longer, and the amount of mist deposit on the vegetable is
increased, and the freshness is improved.
[0687] Further, although not described specifically herein, when
defrosting the evaporator or right after defrosting, cold air at
high humidity is more likely to be entered, and atomizing electrode
135 is in an environment likely to atomize mist. It is therefore
preferred to transfer to the dew condensation and atomizing mode by
applying a high voltage. Besides, the atomizing electrode right
after defrosting is relatively at high temperature, and after
stopping heat conducting pin heater 158 for a specific time, it is
desired to apply a high voltage to atomize mist.
[0688] Thus, the dew condensation and atomizing mode and the drying
mode are repeated to control appropriately the state of atomizing
electrode 135 of electrostatic atomizing device 131 of the mist
maker, and the mist atomizing efficiency can be enhanced. As a
result, the mist can be atomized while the energy is saved, and it
is easy to manage the temperature when cooling atomizing electrode
135 at the tip of the department mist, and the atomizing amount can
be controlled at a higher precision.
[0689] In the preferred embodiment, in order to avoid an air layer
between cooling pin 134 of heat conduction material for cooling of
mist generation department and the cooling section, voids 196
between cooling pin 134 and the cooling section are filled up with
void burying members 197a, 197b, 197c of a high heat conduction
material than the air layer, such as butyl or heat diffusion
compound. Such filing is not required, however, if there is no air
layer between cooling pin 134 of heat conduction material and the
cooling section. For example, by eliminating the air layer by
fixing cooling pin 134 tightly to the wall of partition 161, heat
conduction to cooling pin 134 is assured, and the temperature may
be managed appropriately when cooling atomizing electrode 135 at
the tip of the department mist in a simpler configuration.
Preferred Embodiment 22
[0690] FIG. 34 shows a detailed sectional view near the
electrostatic atomizing device cut along line A-A in FIG. 2 in
preferred embodiment 22 of the present invention.
[0691] In this preferred embodiment, in the refrigerator in
preferred embodiment 10, instead of the electrostatic atomizing
device shown in FIG. 14, the electrostatic atomizing device shown
in FIG. 34 is used. In the preferred embodiment, the configuration
is same as in preferred embodiment 10 shown in FIG. 14, and similar
effects are obtained. Further as shown in FIG. 34, near cooling pin
134, heat conducting pin heater 158 is provided for regulating the
temperature of cooling pin 134.
[0692] In the preferred embodiment, too, since cooling pin 134 is
cooled by way of a heat insulator of heat cushioning material,
atomizing electrode 135 is cooled indirectly by cooling pin 134 of
heat conduction material. It is further cooled indirectly in a dual
structure by way of heat insulator 152 of heat cushioning material.
Extreme cooling can be prevented by regulating the temperature of
atomizing electrode 135 at the tip of the department mist by means
of heat conducting pin heater 158. If atomizing electrode 135 is
cooled extremely, the dew condensation amount increases, and the
input to electrostatic atomizing device 131 is increased due to
increase of load to mist generation department 139, and mist-making
failure due to freezing of mist generation department 139 may be
feared. However, such troubles due to increase of load to mist
generation department 139 can be avoided, and an appropriate dew
condensation amount is assured, and a stable mist atomizing is
realized at low input.
[0693] As explained so far, in the cooling section, the mist
generation department is cooled indirectly by way of a heat
conduction material, and the water volume in the mist generation
department is regulated, and the configuration of atomizing the
mist by regulating the atomizing amount of mist from the mist
generation department into the storage compartments in a simple
structure is explained in the foregoing preferred embodiments.
[0694] Referring now to the drawings for explaining the preferred
embodiments, the atomizing port and the humidity supplying port are
specifically described below. In particular, it is explained that
the humidity supplying port functions also as a cold air supplying
port for supplying a cold air.
Preferred embodiment 23
[0695] FIG. 35 is a front view near the vegetable compartment in
the refrigerator in preferred embodiment 23 of the present
invention, and the configuration is same as in FIG. 3 showing
preferred embodiment 1. Therefore, same as in FIG. 3, FIG. 35 shows
a detailed sectional view near the electrostatic atomizing device
cut along line A-A in FIG. 2. Referring to FIG. 35, the atomizing
port and the humidity supplying port having a function of cold air
supplying port of the present invention are specifically described
below.
[0696] The mist maker or electrostatic atomizing device 131 is
mainly composed of mist generation department 139, voltage
applicator 133, and outlet wall 137, and atomizing port 132 is
provided in outlet wall 137, together with humidity supplying port
138 as cold air supplying port into outlet wall 137 in the lower
side of outlet wall 137 orthogonal to the surface forming other
atomizing port 132, and mist generation department 139 and voltage
applicator 133 are accommodated inside. Mist generation department
139 includes atomizing electrode 135 having a tip of the department
mist for atomizing mist, and atomizing electrode 135 is fixed to
cooling pin 134 of heat conduction material such as aluminum or
stainless steel.
[0697] This cold air supplying port, that is, humidity supplying
port 138 is installed so that shortest distance d2 between humidity
supplying port 138 and atomizing port 132 may be shorter than
shortest distance d1 between humidity supplying port 138 and
atomizing electrode 135 as a tip of the department mist for
condensing dew.
[0698] In other words, humidity supplying port 138 is provided in
outlet wall 137 at a lower side from atomizing electrode 135 having
the tip of the department mist of mist generation department
139.
[0699] Cooling pin 134 is fixed on outlet wall 137, and cooling pin
134 itself is projecting from the outlet wall. At a position
opposite to atomizing electrode 135, opposite electrode 136 of
circular doughnut shape is disposed at the storage compartment
side, at a specific distance from the leading end of atomizing
electrode 135, and atomizing port 132 is composed on its
extension.
[0700] Near mist generation department 139, voltage applicator 133
is formed, and the negative potential side of voltage applicator
133 for generating a high voltage is electrically connected to
atomizing electrode 135, and the positive potential side, to
opposite electrode 136 respectively.
[0701] Voltage applicator 133 communicates with and is controlled
by controller 146 of the refrigerator main body, and turns on or
off the high voltage by an input signal from refrigerator 100 or
electrostatic atomizing device 131.
[0702] Surface of rear-end partition 151 fixing the mist maker,
that is, electrostatic atomizing device 131 is provided with heater
154 or other heating means for regulating the temperature in the
storage compartment or preventing dew condensation on the surface,
installed between surface of rear-end partition 151 and heat
insulator 152.
[0703] Thus, the mist-maker is installed in the partition having
heater 154 or other heating means on the side wall, and heater 154
is also provided at least at the lower side of the mist maker.
[0704] In the refrigerator having such configuration, the operation
and effects are explained below. First, the operation of the
freezing cycle is described. Depending on the preset temperature in
the compartment, the freezing cycle is started by a signal from a
control circuit board (not shown), and the cooling operation is
executed. The refrigerant of high temperature and high humidity
discharged from the operation of compressor 109 is somewhat
condensed and liquefied in a condenser (not shown), and flows
through the side or back of the refrigerator main body, passes
through a refrigerant piping (not shown) disposed at the front
opening of the refrigerator main body, and is condensed and
liquefied while preventing dew condensation in the refrigerator
main body, and reaches up to a capillary tube (not shown). In the
capillary tube, thereafter, while exchanging in heat with suction
tube (not shown) into compressor 109, it is decompressed to become
a liquid refrigerant of low temperature and low pressure, and
reaches up to evaporator 112. Herein, the liquid refrigerant of low
temperature and low pressure is exchanged in heat with the air in
the storage compartments such as outlet air-duct 141 for freezer
compartment conveyed by the operation of cooling fan 113, and the
refrigerant in evaporator 112 is evaporated and vaporized. At this
time, cold air for cooling each storage compartment is generated in
the cooling compartment. The cold air at low temperature is
distributed from cooling fan 113 into refrigerator compartment 104,
switchable temperature compartment 105, icemaker 106, vegetable
compartment 107, and freezer compartment 108 by way of air duct and
damper, and each compartment is cooled to a desired temperature
zone. In particular, vegetable compartment 107 is regulated to be
2.degree. C. to 7.degree. C. by on/off operation of distribution of
cold air or heating unit (not shown), and generally compartment
temperature detecting means is not provided.
[0705] Vegetable compartment 107 cools refrigerator compartment
104, and this air is discharged into vegetable compartment 107 from
outlet 124 for vegetable compartment disposed in the midst of air
duct 140 returning from refrigerator compartment for circulating
into evaporator 112, and passed into the outer circumference of
upper basket 120 or lower basket 119 to cool indirectly, and
returns again to evaporator 112 from inlet 126 for vegetable
compartment.
[0706] In a certain part at position of relatively high humidity
environment in rear partition 111, heat insulator 152 is thinner in
wall thickness than in other parts, and the heat insulator is
formed in a thickness of about 2 mm to 10 mm, for example, behind
cooling pin 134 in particular. As a result, a recess is formed in
rear partition 111, and electrostatic atomizing device 131 is
provided in this place, so that the atomizing direction may be
toward space in the storage compartment.
[0707] Outlet air-duct 141 for freezer compartment provided at the
back side of the cooling pin is a flow passage of cold air of about
-15 to -25.degree. C. generated in evaporator 112 by operation of
the cooling system and blown by cooling fan 113, and by heat
conduction from the air duct surface, cooling pin 134 is cooled,
for example, to about 0 to -6.degree. C. At this time, since
cooling pin 134 is a heat conduction material, the cold heat is
transmitted quickly, and the atomizing electrode is also cooled to
about 0 to -6.degree. C.
[0708] Herein, since the vegetable compartment is at 2.degree. C.
to 7.degree. C., and is at a relatively high humidity due to
transpiration from vegetables, and atomizing electrode 135 is below
the dew point.
[0709] Moisture in the air entering from humidity supplying port
138 as cold air supplying port provided in outlet wall 137
condenses dew, and this dew condensation water is turned into a
mist in mist generation department 139, and is atomized from
atomizing port 132, and thereby an air inlet or outlet is formed in
outlet wall 137, and due to effects of air convection in the
storage compartment, an air flow is generated including the area of
atomizing electrode 135, and air of relatively high humidity due to
transpiration from vegetables is supplied efficiently and stably
into atomizing electrode 135 from humidity supplying port 138, and
water drops are formed and applied to atomizing electrode 135
including the leading end.
[0710] This cold air supplying port, that is, humidity supplying
port 138 is installed so that shortest distance d2 between humidity
supplying port 138 and atomizing port 132 may be shorter than
shortest distance d1 between humidity supplying port 138 and
atomizing electrode 135 as a tip of the department mist for
condensing dew, and a part of the cold air flowing into outlet wall
137 from humidity supplying port 138 flows into the periphery of
atomizing electrode 135 in order to promote dew condensation, and
also a part passes through the air duct of smallest ventilation
resistance as a short cut to atomizing port 132 from humidity
supplying port 138 without passing through atomizing electrode 135,
and by the cold air passing through the short-cut air duct, a flow
of air may be generated more positively in outlet wall 137, and the
moisture does not stay in outlet wall 137, and circulates together
with the flowing cold air.
[0711] Thus, humidity supplying port 138 introduces humidity into
outlet wall 137, and also has a function as cold air supplying port
for generating a flow of cold air in outlet wall 137.
[0712] When forming a short-cut air flow of smallest ventilation
resistance from humidity supplying port 138 to atomizing port 132
without passing through atomizing electrode 135 at the tip of the
department mist, shortest distance d2 between humidity supplying
port 138 and atomizing port 132 is set shorter than shortest
distance d1 between humidity supplying port 138 and atomizing
electrode 135 as a tip of the department mist for condensing dew,
but an air duct of smallest ventilation resistance may be formed in
other parts, and similar effects are obtained.
[0713] At this time, humidity supplying port 138 is provided at the
lower side of outlet wall 137 at the bottom side of the storage
compartment, and if the dew condensation water by dew condensation
in mist generation department 139 is collected at the lower side of
outlet wall 137, the dew condensation water can be discharged out
of the outlet wall from this opening. That is, this opening
functions not only as a humidity supplying port or a cold air
supplying port, but also as a water drain port of dropping dew
condensation water, and generation of water scale or invasion of
dew condensation water into the voltage applicator due to
collection of dropping dew condensation water can be prevented, and
the safety of electrostatic atomizing device 131 is enhanced.
[0714] Thus, in the present invention, these openings such as
atomizing port 132 and humidity supplying port 138 are provided in
other surface than the upper surface of outlet wall 137, and if the
dew condensation water in the storage compartment collected at a
higher position than outlet wall 137 in the storage compartment
drops into outlet wall 137 in the storage compartment of the
refrigerator in a cold and closed space, since there is no opening
in the upper side of outlet wall 137, dropping of water drops from
outside of outlet wall 137 into the inside of outlet wall 137 can
be prevented, and a refrigerator of higher safety free from
electric leak or short circuit can be presented.
[0715] Since humidity supplying port 138 is provided at the lower
side of outlet wall 137, the upper surface of outlet wall 137 is
closed and not opened, and if dew condensation is generated in
outlet wall 137, the lower side of outlet wall 137 has humidity
supplying port 138 functioning as water drain port and as an
opening for flow of cold air, generation of water scale or growth
of bacteria or mold in outlet wall 137 can be prevented.
[0716] The mist maker and outlet wall 137 have humidity supplying
port 138 provided at a position immediately above the upper end of
lower basket 119 in the storage compartment mainly for atomizing
mist as shown in FIG. 1, so that the cold air of high humidity may
be taken in from humidity supplying port 138, and the cold air of
high humidity is likely to flow into humidity supplying port 138
from the storage compartment, and the dew condensation water is
generated more efficiently, and can be atomized as mist.
[0717] The mist maker is provided in the partition having heater
154 or other heating means in the side wall, and as compared with
other side wall, in the partition likely to generate an ascending
air stream by heater 154, outlet wall 137 containing the mist
generation department of the mist maker is provided, and the lower
side is opened as a humidity supplying port, and by riding on the
ascending air stream, the cold air smoothly flows into the outlet
wall, and an air stream is positively generated in outlet wall 137,
and moisture is not collected in outlet wall 137, but is circulated
together with the flowing cold air, or circulated as mist by
condensing dew in the mist generation department.
[0718] Heater 154 is formed also at least at the lower side of the
mist maker, and an ascending air stream to humidity supplying port
138 is generated more securely, and the cold air is likely to flow
into outlet wall 137, and the air stream is more positively
generated in outlet wall 137, and humidity supplying port 138 more
effectively plays the role of cold air supplying port for
generating a stream of cold air into outlet wall 137.
[0719] The mist maker and outlet wall 137 have the mist maker
disposed as the side of inlet 126 for vegetable compartment as an
outlet of cold air, from the center in the lateral direction of the
storage compartment as shown in FIG. 2, so that the cold air of
high humidity can be taken in from humidity supplying port 138. As
a result, the cold air of high humidity from the storage
compartment flows abundantly to the side of inlet 126 for vegetable
compartment as an outlet of cold air, and in the lateral direction
in the storage compartment, at the outlet of cold air, the humidity
is higher at the side of inlet 126 for vegetable compartment as an
outlet of cold air, and the cold air of high humidity from the
storage compartment is more likely to flow into humidity supplying
port 138, and the condensation water is generated more efficiently,
and the mist can be atomized.
[0720] The vicinity of the mist maker is high in humidity due to
atomizing of mist, and especially in outlet wall 137, generation of
water scale or electric leak by way of moisture are likely to
occur, but since humidity supplying port 138 functioning as cold
air supplying port is provided in the preferred embodiment, an
access of air is formed, and an air stream is positively generated
in outlet wall 137, and moisture is not collected in outlet wall
137, but can be circulated together with the flowing cold air.
[0721] In outlet wall 137, in particular, at the lower side than
the mist generation department of atomizing electrode 135,
relatively large and heavy particles among the atomized mist
collide against the outlet wall, and the mist not atomized into the
storage compartment may deposit, and generation of water scale or
electric leak by way of moisture may be likely to occur, but in the
preferred embodiment, since the humidity supplying port is provided
at the lower side of the mist generation department of outlet wall
137 where moisture is likely to deposit, the cold air at the lower
side of high humidity is passed into the mist generation
department, and dew is condensed positively in the mist generation
department, and moisture does not stay in outlet wall 137, and a
cold air having a sufficient humidity is supplied into the mist
generation department, and the air of relatively high humidity is
supplied efficiently and stably from humidity supplying port 138
into atomizing electrode 135, and water drops are generated and
applied to atomizing electrode 135 including the leading end of the
mist generation department.
[0722] Further, in the preferred embodiment, since electrostatic
atomizing device 131 is used, the particle size of generated mist
is as small as several unit of nm or tens of units of nm, and the
atomizing electrode is sterilized by application of high voltage,
and the generated fine mist deposits near the atomizing port, not
forming a water sump, and since the fine mist contains OH radicals
and ozone of high oxidation power, growth of bacteria near the
atomizing port can be prevented, and water scale is not formed.
[0723] If dew condensation water depositing on rear partition 111
directly drops as liquid drops, or drops along outlet wall 137, the
water is discharged outside of outlet wall 137 from humidity
supplying port 138, and invasion into voltage applicator 133 can be
prevented.
[0724] Thus, from the steam in vegetable compartment 107, dew can
be condensed on atomizing electrode 135 easily and securely, and
water supply device or other complicated device is not needed, and
mist can be atomized in a simple structure.
[0725] By atomizing mist by the electrostatic atomizing device, a
fine mist is generated, and the atomized fine mist uniformly
deposits on the surface of vegetables and fruit, and transpiration
from vegetables and fruit can be suppressed, and the freshness is
enhanced.
[0726] Since atomizing electrode 135 and voltage applicator 133 are
contained in outlet wall 137, accidental touch of user's hand with
atomizing electrode 135 and voltage applicator 133 can be
prevented, and if a high voltage is applied in the storage
compartment, fine mist can be atomized while assuring the safety of
the user.
[0727] A high voltage (for example, 4 to 10 kV) is applied between
two electrodes, that is, atomizing electrode 135 at negative
voltage side, and opposite electrode 136 at positive electrode
side, from voltage applicator 133. At this time, a corona discharge
takes place between the two electrodes, and water drops at the
leading end of atomizing electrode 135 are pulverized by an
electrostatic energy, and since the liquid drops are electrically
charged, by Rayleigh scattering, electrically charged invisible
nano-level fine mist of several nm units, and ozone and OH radical
are generated at the same time. The voltage applied between the
electrodes is very high, about 4 to 10 kV, but the discharge
current value at this time is several .mu.A levels, and the input
is very low, about 0.5 to 1.5 W.
[0728] When a fine mist is atomized from atomizing electrode 135,
an ion wind is generated. At this time, also, by humidity supplying
port 138 formed separately from atomizing port 132, an air of high
humidity freshly flows into atomizing electrode 135, and the mist
can be atomized continuously.
[0729] The generated fine mist is atomized into lower basket 119,
and is very fine in particle size, and is hence strong in
diffusion, and the fine mist easily reaches up to upper basket 120.
Since the atomized mist is generated by high voltage discharge, it
is charged negatively. On the other hand, vegetable compartment 107
contains green and leafy plants among vegetables and fruit, and
these vegetables and fruit are likely to transpire or wither due to
transpiration during storage. Some of the vegetables and fruit
stored in the vegetable compartment may be already withered due to
transpiration when returning from shop or during storage, and are
positively charged. Hence, the atomized mist is likely to gather on
the surface of vegetables, and hence the keeping-fresh performance
is enhanced.
[0730] The nano-level fine mist sticking to the vegetable surface
contains OH radicals and traces of ozone, and is effective for
killing germs, resisting germs and removing germs, and still more,
vegetables are encouraged to increase in nutrients such as vitamin
C by removal of agricultural chemicals and anti-oxidation by
oxidation and decomposition.
[0731] If there is no water in atomizing electrode 135, the
discharge distance becomes longer, and the insulation layer of air
cannot be broken, and discharge phenomenon does not take place. As
a result, no current flows between the atomizing electrode and the
opposite electrode. This phenomenon is detected by controller 146
of refrigerator 100, and the high voltage of voltage applicator 133
can be turned on and off.
[0732] Thus, in the preferred embodiment, electrostatic atomizing
device 131 is provided for atomizing mist into thermally insulated
storage compartment (vegetable compartment 107) and storage
compartment (vegetable compartment 107), and mist generation
department 139 includes atomizing electrode 135 electrically
connected to voltage applicator 133 for generating a high voltage,
opposite electrode 136 disposed at a position opposite to atomizing
electrode 135, and a cooling section for cooling atomizing
electrode 135 below the dew point, and the moisture in the is
cooled to condense dew on atomizing electrode 135, and is atomized
as mist into storage compartment (vegetable compartment 107), and
from the excessive steam in storage compartment (vegetable
compartment 107), dew can be easily condensed on atomizing
electrode 135, and fine mist of nano level is generated by corona
discharge of high voltage with opposite electrode 136, and the
atomized fine mist uniformly deposits on the surface of vegetables
and fruit, and transpiration from vegetables and fruit can be
suppressed, and the freshness is enhanced. Besides, moisture can be
supplied into withered cells from gaps and pores between cells in
the surface of vegetables and fruit by permeating through tissues,
and the vegetables are returned to a fresh state.
[0733] Ozone and OH radicals generated at the same time with the
mist are effective for deodorizing, removing harmful substances
from the food surface, and preventing contamination.
[0734] The atomized mist is directly applied to the food in the
vegetable compartments (upper basket 120 and lower basket 119), and
by making use of the potential between the mist and vegetables, the
mist can be applied on the surface of vegetables, and the
efficiency of preservation is enhanced.
[0735] From the excessive steam in the storage compartment
(vegetable compartment 107), dew is condensed on atomizing
electrode 135, and water drops are applied, and mist is atomized,
and water tank is not needed, or the pump, capillary or other water
supplying parts are not used, and the structure is built up
inexpensively.
[0736] Besides, instead of tap water, water from dew condensation
is used, and it is free from minerals and impurities, and
deterioration when water retaining material is used, or
deterioration of water retaining properly due to clogging can be
prevented.
[0737] This is not ultrasonic mist making by ultrasonic vibration,
water tank is not needed, and the input is small, and temperature
effects in the compartment are low.
[0738] The portion containing voltage applicator 133 is buried in
rear partition 111, and is cooled, so that the temperature rise of
the circuit board can be suppressed. As a result, temperature
effects in the storage compartment (vegetable compartment 107) are
kept low.
[0739] The preferred embodiment presents a refrigerator including
storage compartments thermally insulated by the partition, and the
mist generation department for atomizing mist into the storage
compartment, and the mist generation department includes a tip of
the department mist for atomizing mist into the storage
compartment, a voltage applicable for applying a voltage to the tip
of the department mist, and a heat conduction material coupled to
the tip of the department mist, and also an outlet wall for
accommodating the tip of the department mist, and the outlet wall
includes a atomizing port for passing the mist, and a humidity
supplying port for passing the humidity, aside from the atomizing
port, and the mist-making leading end is cooled by the cooling
section to a temperature lower than the dew point, and the moisture
in the air is cooled to condense dew on the tip of the department
mist, and atomized into the storage compartment.
[0740] By such configuration, since an air access is formed, due to
effects of air convection in the storage compartment (vegetable
compartment 107), an air stream is also generated in atomizing
electrode 135, and the moisture (humidity) in the air in the
storage compartment (vegetable compartment 107) can be efficiently
and stably supplied into atomizing electrode 135, and dew
condensation is promoted.
[0741] Humidity supplying port 138 is provided at the bottom side
of outlet wall 137, and of the dew condensation water depositing on
rear partition 111 drops, invasion into voltage applicator 133 from
humidity supplying port 138 can be prevented, and the safety is
enhanced.
[0742] When a fine mist is atomized from atomizing electrode 135,
an ion wind is generated, and at this time, a fresh air flows into
atomizing electrode 135 from humidity supplying port 138
functioning also as a cold air supplying port, and circulation flow
(short circuit) is not formed near atomizing port 132, and the mist
can be atomized continuously and stably.
[0743] By installing the gap in the storage compartment (vegetable
compartment 107), the storage volume is not decreased, and since it
is provided at the inner side, and is not accessible by the user's
hand, and the safety is enhanced.
[0744] Ozone is also generated when a fine mist is generated. By
on/off operation of electrostatic atomizing device 131, the ozone
concentration in the storage compartment (vegetable compartment
107) can be adjusted. By adjusting the ozone concentration
appropriately, deterioration such as yellowing of vegetables can be
prevented, and the bactericidal action and antibacterial action of
the vegetable surface can be enhanced.
[0745] In the preferred embodiment, the air duct for cooling of
cooling pin 134 is outlet air-duct 141 for freezer compartment, but
other low temperature air duct may be used, such as discharging air
duct from icemaker 106, or returning air duct from freezer
compartment. As a result, the possible location for installation of
electrostatic atomizing device 131 may be expanded.
[0746] In the preferred embodiment, water retaining material is not
provided around atomizing electrode 135 of electrostatic atomizing
device 131, but water retaining material may be provided. As a
result, the dew condensation water generated near atomizing
electrode 135 can be held around atomizing electrode 135, and may
be appropriately supplied to atomizing electrode 135.
[0747] In the preferred embodiment, the storage compartment of
refrigerator 100 for comprising electrostatic atomizing device 131
is vegetable compartment 107, but it may be installed in freezer
compartment 104 or switchable temperature compartment 105 or
storage compartment in other temperature zone, and various
applications may be developed.
[0748] In the preferred embodiment, the cooling unit of atomizing
electrode 135 is the heat conduction from the surface of outlet
air-duct 141 for freezer compartment by flow of cold air generated
in evaporator 112, but it may be realized by a Peltier element
making use of Peltier effect disposed directly on cooling pin 134.
In this case, by adjusting the supply voltage to the Peltier
element, the temperature can be controlled very delicately, and the
optimum temperature may be adjusted at the tip.
[0749] In the preferred embodiment, aside from atomizing port 132,
humidity supplying port 138 is provided at the lower (bottom) side
of outlet wall 137 perpendicular to the side of atomizing port 132,
and as this humidity supplying port 138, the nearly entire area of
the lower side portion of outlet wall 137 may be opened. In this
case, a large volume of air can be supplied into outlet wall 137
form the lower side of lower shell 137, and the air resistance in
outlet wall 137 can be decreased, and hence the flow of cold air in
outlet wall 137 is encouraged, and the dew condensation in the mist
generation department can be promoted more efficiently.
[0750] Besides, since the lower side portion is opened almost
entirely, gathering of dew condensation water in outlet wall 137
can be prevented, and if the dew condensation water directly drops,
or drops along outlet wall 137, the water is smoothly discharged
outside of outlet wall 137 through humidity supplying port 138, and
invasion into voltage applicator 133 is prevented, and the safety
of electrostatic atomizing device 131 is further enhanced.
[0751] In this manner, when humidity supplying port 138 provided in
the bottom of outlet wall 137 is also provided with a function as a
water drain port, preferably humidity supplying port 138 is
disposed at the lowest side in the bottom of outlet wall 137, so
that the water is not collected in outlet wall 137, but is
discharged quickly by gravity.
[0752] For more smooth discharge of water, the bottom of outlet
wall 137 is inclined downward, and humidity supplying port 138 as
water drain port is disposed at the lowest side in the bottom.
[0753] In particular, when the door is closed, the storage
compartment is cold and closed, and the dew condensation water
formed on the wall may drop in such refrigerator. In the preferred
embodiment, however, the upper side of outlet wall 137 is close,
having no opening, and the dew condensation water in upper parts of
outlet wall 137 will not drop and flow into outlet wall 137. It is
therefore free from troubles such as electric leak or defective
mist making due to invasion of dew condensation water outside of
outlet wall 137 into atomizing electrode 135 or voltage applicator
133.
[0754] Further, since the upper side of outlet wall 137 is closed,
depending on the high humidity environment in outlet wall 137, dew
condensation water may be generated inside of outlet wall 137 at
the upper side. In such a case, too, since a humidity supplying
port is provided at the lower side, if the dropping dew
condensation water is likely to be collected due to closing of the
upper side, the dropping dew condensation water is smoothly
discharged from humidity supplying port 138 to outside of outlet
wall 137. Therefore, invasion of the dropping dew condensation
water into voltage applicator 133 is prevented, and the safety of
electrostatic atomizing device 131 is further enhanced
[0755] In the preferred embodiment, the mist maker is represented
by electrostatic atomizing device 131, but the mist maker is not
limited to electrostatic atomizing device 131 alone, and it may be
realized by, for example, ultrasonic mist device or ejector mist
maker, and the same technology can be applied to outlet wall 137
containing the tip of the department mist for atomizing mist in the
mist maker. In particular, when water is replenished to the mist
maker by making use of dew condensation water obtained from the
moisture in the air in the storage compartment by dew condensation
in mist generation department 138, in order to condense dew
effectively, the same technology can be applied to humidity
supplying port 138 for taking the cold air at high humidity into
outlet wall 137.
[0756] In the preferred embodiment, humidity supplying port 138
functions also as cold air supplying port. Humidity supplying port
138 mainly for taking in the cold air at high humidity is effective
because of the following reasons. That is, as explained in the
preferred embodiment, the moisture in the air in the storage
compartment (vegetable compartment 107) is condensed in mist
generation department 139, and this dew condensation water is
utilized for atomizing mist. In a similar configuration, it is also
effective, for example, when the water collected in a water tank is
supplied into electrostatic atomizing device 131, and mist is
atomized. In the latter case, as explained in the preferred
embodiment, the humidity tends to be higher around electrostatic
atomizing device 131 due to atomizing of mist, and especially in
outlet wall 137, same problems may occur such as generation of
water scale, or electric leak through moisture. Therefore the water
replenish method in electrostatic atomizing device 131 is not
limited to dew condensation method, but the same technology can be
effectively applied in other water replenish method such as the
method of using a water tank and supplying the collected water into
electrostatic atomizing device 131.
Preferred Embodiment 24
[0757] FIG. 36 is a sectional view near the vegetable compartment
in the refrigerator in preferred embodiment 24 of the present
invention, showing a detailed sectional view near E of the
electrostatic atomizing device cut along line D-D in FIG. 2.
[0758] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 23 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
23 are omitted in explanation. In particular, the technical concept
of preferred embodiment 23 for generating a flow of cold air by
cold air supplying port into the outlet wall is similarly applied
to the configuration of this preferred embodiment.
[0759] As shown in FIG. 36, outlet wall 137 of electrostatic
atomizing device 131 is provided with atomizing port 132, and
additionally humidity supplying port 138 as cold air supplying port
positioned in the space between lower basket 119 and upper basket
120 not having obstacle between the side having atomizing port 132
and the perpendicular side of the storage compartment of outlet
wall 137.
[0760] In the refrigerator having such configuration, the operation
and its effects are described below. The cooling section of cooling
pin 134 and the operation and actions of mist atomizing are same as
in preferred embodiment 1, and the explanation is omitted.
[0761] The air entering from humidity supplying port 138 provided
in outlet wall 137 is formed into a mist in mist generation
department 139, and is atomized from atomizing port 132, and an air
access is formed, and due to effects by air convection in the
storage compartment, an air flow is generated in outlet wall 137
including atomizing electrode 135, and the air of relatively high
humidity by transpiration from vegetables is supplied efficiently
and stably from humidity supplying port 138 into atomizing
electrode 135, and water drops are generated and applied to
atomizing electrode 135 including its leading end.
[0762] Thus, the preferred embodiment includes evaporator 112 for
cooling of each storage compartment (vegetable compartment 107),
and rear partition 111 for thermally insulating evaporator 112 and
the storage compartment, electrostatic atomizing device 131 is
provided in rear partition 111, and outlet wall 137 of
electrostatic atomizing device 131 is provided with humidity
supplying port 138 to atomizing electrode 135 aside from supply
port 132, in a space between lower basket 119 and upper basket 120
not having obstacle between the side having atomizing port 132 and
the perpendicular side of outlet wall 137.
[0763] Hence, an air access is formed, and due to effects by air
convection in the storage compartment (vegetable compartment 107),
an air flow is generated also in atomizing electrode section 135,
and the moisture (humidity) in the air in the storage compartment
(vegetable compartment 107) is supplied efficiently and stably into
atomizing electrode 135, and dew condensation is promoted.
[0764] In particular, since mist is atomized, the environment in
outlet wall 137 is likely to form water scale or cause electric
leak through moisture, but since the humidity supplying port is
provided in the preferred embodiment, an air access is formed, and
an air flow is generated positively in outlet wall 137, and the
moisture does not stay within outlet wall 137, but is circulated
together with the flowing cold air.
[0765] In the preferred embodiment, as cold air supplying port,
humidity supplying port 138 is provided aside from atomizing port
132, in the side portion of outlet wall 137 perpendicular to the
side of forming atomizing port 132, and more preferably, as the
humidity supplying port, the bottom portion of the lateral side of
outlet wall 137 may be opened. In this case, a large volume of air
can be supplied into outlet wall 137 form the lower side of lower
shell 137, and the air resistance in outlet wall 137 can be
decreased, and hence the dew condensation in mist generation
department 139 can be promoted more efficiently.
[0766] Besides, since the bottom portion of the lateral side is
opened, gathering of dew condensation water in outlet wall 137 can
be prevented by the function of water drain port, and if the dew
condensation water directly drops, or drops along outlet wall 137,
the water is smoothly discharged outside of outlet wall 137 through
humidity supplying port 138, and invasion into voltage applicator
133 is prevented, and the safety of the electrostatic atomizing
device is further enhanced.
[0767] In this manner, when the humidity supplying port provided at
the lateral side of outlet wall 137 also functions as a water drain
port, preferably the humidity supplying port is disposed on the
extension at the lowest side in the bottom of outlet wall 137, so
that the water is not collected in outlet wall 137, but is
discharged quickly by gravity.
[0768] In particular, when the door is closed, the storage
compartment is cold and closed, and the dew condensation water
formed on the wall may drop in such refrigerator. In the preferred
embodiment, however, the upper side of outlet wall 137 is closed,
having no opening, and the dew condensation water in upper parts of
outlet wall 137 will not drop and flow into outlet wall 137, and it
is therefore free from troubles such as electric leak or defective
mist making due to invasion of dew condensation water outside of
outlet wall 137 into the atomizing electrode or the voltage
applicator.
[0769] Further, since the upper side of outlet wall 137 is closed,
depending on the high humidity environment in outlet wall 137, dew
condensation water may be generated inside of outlet wall 137 at
the upper side, but in such a case, too, since a humidity supplying
port is provided at the lateral side bottom portion, if the
dropping dew condensation water is likely to be collected due to
closing of the upper side, the dropping dew condensation water is
smoothly discharged from humidity supplying port 138 to outside of
outlet wall 137, and invasion of the dropping dew condensation
water into voltage applicator 133 is prevented, and the safety of
electrostatic atomizing device 131 is further enhanced
Preferred Embodiment 25
[0770] FIG. 37 is a longitudinal sectional view near the vegetable
compartment in the refrigerator in preferred embodiment 25 of the
present invention.
[0771] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 24 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
24 are omitted in explanation.
[0772] As shown in FIG. 37, electrostatic atomizing device 131 is
assembled in first partition 123 for thermally insulating the
temperature zones of vegetable compartment 107 and icemaker 106 so
that the atomizing direction may be toward the storage compartment
space, and its heat insulator has a recess in the portion of
cooling pin 134 of mist generation department.
[0773] Outlet wall 137 of electrostatic atomizing device 131 is
provided with atomizing port 132 and other humidity supplying port
138 at the side of the inner side of the storage compartment of
outer case 137 perpendicular to the side of forming atomizing port
132.
[0774] In the refrigerator having such configuration, the operation
and its effects are explained. The thickness of the first partition
123 on which electrostatic atomizing device 131 is installed must
be large enough to having a cooling capacity for cooling of cooling
pin 134 to which atomizing electrode 135 is fixed, and the wall
thickness of the location of which electrostatic atomizing device
131 is smaller than in other parts. Hence, by heat conduction from
the icemaker at a relatively low temperature, cooling pin 134 can
be cooled, and atomizing electrode 135 can be cooled, and the
leading end temperature of atomizing electrode 135 is lower than
the dew point.
[0775] Although not shown, by installing compartment temperature
sensor or compartment humidity sensor in the compartment, the dew
point can be calculated strictly depending on the compartment
environmental changes according to a predetermined formula.
[0776] Since atomizing port 132 and humidity supplying port 138
formed in outlet wall 137 form an air access, due to effects of air
convection in the storage compartment, an air flow is generated
including the area of atomizing electrode 135, and the air of
relatively high humidity due to transpiration from vegetables is
supplied efficiently and stably from humidity supplying port 138
into atomizing electrode 135, and water drops are generated and
applied on atomizing electrode 135 including its leading end.
[0777] A high voltage (for example, 7.5 kV) is applied between two
electrodes, that is, atomizing electrode 135 at negative voltage
side, and opposite electrode 136 at positive electrode side, from
voltage applicator 133. At this time, an air insulation layer is
broken between the electrodes, and a corona discharge takes place,
and the water of atomizing electrode 135 is atomized from the
electrode leading end, and invisible nano level fine mist of less
than 1 .mu.m having an electric charge is generated together with
the accompanying ozone and OH radicals.
[0778] The generated fine mist is atomized into the vegetable
compartment. The fine mist spayed from electrostatic atomizing
device 131 is negatively charged. On the other hand, the vegetable
compartment contains vegetables and fruit, including green and
leafy plants. These vegetables and fruit are often stored in
somewhat withered state due to transpiration when returning from
shop or transpiration during storage. These vegetables and fruit
are usually positively charged, and hence the atomized fine mist of
negative charge is likely to gather on the surface of vegetables.
When the vegetable compartment is set to high humidity again, the
atomized fine mist deposits on the surface of vegetables and fruit,
and transpiration from vegetables and fruit is suppresses, and the
freshness is enhanced. The moisture permeates into the tissues from
the gaps in cells of vegetables and fruit, and is transpired, and
the moisture is supplied again into the withered cells, and
withering is canceled by expansion of cells, and the vegetables are
refreshed.
[0779] The generated fine mist contains ozone and OH radicals, and
they have a strong oxidizing power. Accordingly, the generated fine
mist deodorizes the vegetable compartment, or sterilizes or
bactericides the vegetable surface, and oxidizes, decomposes and
removes the agricultural chemicals, wax and other harmful
substances sticking to the vegetable surface.
[0780] At the present, in the freezing cycle, isobutane of low
global warming factor is mainly used as the refrigerant from the
viewpoint of the environmental protection of the earth. This
isobutane is a hydrocarbon, and as compared with air, its specific
gravity is about 2 times at ordinary temperature and atmospheric
pressure (300 K, 2.04).
[0781] If isobutane leaks from the freezing system while the
compressor is stopped, since it is heavier than air, it leaks
downward. At this time, the refrigerant may leak into the
compartment by way of rear partition 111. In particular, when
leaking from evaporator 112 large in the staying amount of the
refrigerant, the leak amount may be large, but vegetable
compartment 107 incorporating electrostatic atomizing device 131 is
disposed above evaporator 112, the leaking refrigerant will not get
into vegetable compartment 107.
[0782] If isobutane leaks into vegetable compartment 107, since
refrigerant is heavier than air, it is collected in the lower part
of the storage compartment. Hence, since electrostatic atomizing
device 131 is installed in the ceiling of the storage compartment,
the possibility of staying near electrostatic atomizing device 131
is very low.
[0783] Thus, in the preferred embodiment, first partition 123 for
separating the storage compartment (vegetable compartment 107) is
provided, and at the ceiling side of the storage compartment
(vegetable compartment 107), a low temperature storage compartment
(icemaker 106) is provided, and if storage compartments in freezing
temperature zone such as freezer compartment 108 or icemaker 106
are provided in upper parts, by installing electrostatic atomizing
device 131 in first partition 123 in the ceiling for separating
them, any particular cooling device is not needed, and only by
atomizing from the ceiling side, the mist can be easily diffused
into the entire storage compartment (lower basket 119, upper basket
120).
[0784] In the preferred embodiment, in outlet wall 137 of
electrostatic atomizing device 131, aside from atomizing port 132,
humidity supplying port 138 into atomizing electrode 135 is
provided at the inner side of outlet wall 137 perpendicular to the
side of forming of atomizing port 132. As a result, an air access
is formed, and due to effects of air convection in the storage
compartment (vegetable compartment 107), an air flow is generated
also in atomizing electrode 135, and moisture (humidity) in the air
in the storage compartment (vegetable compartment 107) can be
supplied efficiently and stably into atomizing electrode 135, and
the dew condensation is promoted. At the same time, since humidity
supplying port 138 is provided at the inner side of outlet wall
137, touching of voltage applicator 133 by the user's hand from
humidity supplying port 138 is prevented, and the safety is
enhanced.
[0785] In particular, since mist is atomized, the environment in
outlet wall 137 is likely to form water scale or cause electric
leak through moisture, but since the humidity supplying port is
provided as a cold air supplying port in the preferred embodiment,
an air access is formed, and an air flow is generated positively in
outlet wall 137, and the moisture does not stay within outlet wall
137, but is circulated together with the flowing cold air.
[0786] Thus, humidity supplying port 138 introduces humidity into
outlet wall 137, and also functions as cold air supplying port for
generating a flow of cold air in outlet wall 137.
[0787] In the preferred embodiment, since the bottom portion is
opened as atomizing port 132, this atomizing port 132 functions as
a water drain port for preventing gathering of dew condensation
water in outlet wall 137. Therefore, if the dew condensation water
directly drops, or drops along outlet wall 137, the water is
smoothly discharged outside of outlet wall 137 through atomizing
port 132, and invasion into voltage applicator 133 is prevented,
and the safety of the electrostatic atomizing device is further
enhanced. In this manner, when atomizing port 132 provided at the
bottom side of outlet wall 137 functions as a water drain port,
preferably atomizing port 132 is disposed at the lowest side in the
bottom of outlet wall 137, so that the water is not collected in
outlet wall 137, but is discharged quickly by gravity.
[0788] Thus, in the present invention, the both openings of
atomizing port 132 and humidity supplying port 138 are provided in
the surface other than the top surface of outlet wall 137, and if
the dew condensation water in the storage compartment collected in
the upper part than outlet wall 137 in the storage compartment in
the storage compartment in the refrigerator in the low temperature
closed space drops into outlet wall 137, since there is no opening
in the top surface of outlet wall 137, the water drop is prevented
from falling into outlet wall 137 from outside of outlet wall 137,
and a refrigerator of higher safety free from current leak or
short-circuit can be presented.
[0789] Atomizing port 132 is provided in the lower part of outlet
wall 137, and the upper side of outlet wall 137 is closed and not
opened, and if dew is likely to condense in outlet wall 137, the
lower side of outlet wall 137 is provided with atomizing port 132
having a function of water draining port, and formation of water
scale or growth of bacteria or mold in outlet wall 137 can be
prevented.
[0790] In particular, when the door is closed, the storage
compartment is cold and closed, and the dew condensation water
formed on the wall may drop in such refrigerator. In the preferred
embodiment, however, the upper side of outlet wall 137 is closed,
having no opening, and the dew condensation water in upper parts of
outlet wall 137 will not drop and flow into outlet wall 137, and it
is therefore free from troubles such as electric leak or defective
mist making due to invasion of dew condensation water outside of
outlet wall 137 into the atomizing electrode or the voltage
applicator.
[0791] Further, since the upper side of outlet wall 137 is closed,
depending on the high humidity environment in outlet wall 137, dew
condensation water may be generated inside of outlet wall 137 at
the upper side, but in such a case, too, since atomizing port 132
is provided at the bottom portion, if the dropping dew condensation
water is likely to be collected due to closing of the upper side,
the dropping dew condensation water is smoothly discharged from
atomizing port 132 having a function of water drain port to outside
of outlet wall 137, and invasion into voltage applicator 133 is
prevented, and the safety of electrostatic atomizing device 131 is
further enhanced
[0792] Further, since atomizing electrode 135 and voltage
applicator 133 are contained in outlet wall 137, the user's hand is
prevented from touching atomizing electrode 135 and voltage
applicator 133, and if a high voltage is applied in the storage
compartment (vegetable compartment 107), a fine mist can be
atomized while guaranteeing the safety of the user.
[0793] Mist generation department 139 and cooling pin 134 is
provided in the recess, not projecting into the storage compartment
(vegetable compartment 107), and the user's hand hardly touches
atomizing electrode 135 and voltage applicator 133. Therefore, if a
high voltage is applied in the storage compartment (vegetable
compartment 107), the safety of the user can be further enhanced.
Moreover, since outlet wall 137 is provided at the inner side of
the ceiling side, the safety is much more enhanced.
[0794] Since the mist can be atomized from the ceiling, the mist
can be diffused in the entire storage compartment (lower basket
119, upper basket 120).
[0795] Mist generation department 139 of the preferred embodiment
is intended to generate mist by an electrostatic mist-making
system, and water drops are broken and pulverized by using an
electric energy of high voltage, and a fine mist is generated.
Since the generated mist is electrically charged, when the mist is
charged in an opposite polarity of the desired vegetables and
fruit, for example, by atomizing a negatively charged mist to the
positively charged vegetables, the bonding strength on the
vegetables and fruit is increased, and the mist is applied more
uniformly on the vegetable surface, and the mist bonding rate is
improved as compared with the non-charged mist. The atomized fine
mist is directly applied on the food in the vegetable compartment
(lower basket 119, upper basket 120), and the fine mist can be
boded to the vegetable surface by making use of the potential of
the fine mist and the vegetables, and the freshness may be enhanced
efficiency.
[0796] The replenish water in the preferred embodiment is dew
condensation water, not tap water. It is free from minerals and
impurities, and it is free from deterioration at the leading end of
atomizing electrode 135 or deterioration of water retaining
property due to clogging.
[0797] Since the mist in the preferred embodiment contains
radicals, and the agricultural chemicals and wax sticking to the
vegetable surface can be decomposed and removed by an extremely
small amount of water, and the water is saved, and the input is
low.
[0798] Since electrostatic atomizing device 131 is disposed at a
higher position than the evaporator (evaporator 112), if the
freezing cycle is composed by using refrigerant such as isobutane
or propane, and if the refrigerant leaks, since it is heavier than
air, and it is not collected in vegetable compartment 107, and it
is very safe.
[0799] In vegetable compartment 107, too, since electrostatic mist
generation department 139 is installed above the storage
compartment (vegetable compartment 107), if the refrigerant leaks
out from the refrigerant piping in the refrigerator main body, it
does not stay in the lower parts of vegetable compartment 107, and
there is no problem.
[0800] Since vegetable compartment 107 has no part directly facing
or contacting the refrigerant piping, the refrigerant will not leak
out directly from the refrigerant piping or the like.
Preferred Embodiment 26
[0801] FIG. 38 is a sectional view near the vegetable compartment
in the refrigerator in preferred embodiment 26 of the present
invention. FIG. 39 is a sectional view near the vegetable
compartment in the refrigerator in other mode of preferred
embodiment 26 of the present invention. FIG. 40 is a detailed plan
view near the electrostatic atomizing device cut along line E-E in
FIG. 39.
[0802] In this preferred embodiment, only the portions different
from the configuration specifically described in the foregoing
preferred embodiments are explained, and the portions similar to
the configuration specifically described in the foregoing preferred
embodiments or applicable to the same technical concept are omitted
in explanation.
[0803] As shown in the drawing, in the preferred embodiment, in the
highest part of refrigerator 100, refrigerator compartment 104 is
composed as a first storage compartment, and in the lower part of
refrigerator compartment 104, switchable temperature compartment
105 as a fourth storage compartment and icemaker 106 as a fifth
storage compartment are disposed side by side, freezer compartment
108 is formed in the lower part of switchable temperature
compartment 105 and icemaker 106, and vegetable compartment 107 is
formed in the further lower part of freezer compartment 108.
[0804] Second partition 125 of heat insulating property is provided
for separating the temperature zones of vegetable compartment 107
and freezer compartment 108, and partition 251 is formed at the
inner side of second partition 125 and at the inner side of freezer
compartment 108. Between partition 251 and thermally insulated
cabinet 101 of the refrigerator, evaporator 112 is installed, and
in its lower part, radiant heater 114 for thawing the frost
depositing on the evaporator is provided together with drain pan
115 for receiving the defrosted water. Cooling compartment 110 is
composed together with them including cooling fan 113 for conveying
cold air into the individual compartments.
[0805] In second partition 125 for separating cooling compartment
110 and the vegetable compartment, electrostatic atomizing device
131 is provided as a mist maker so as to utilize the cooling source
of cooling compartment 110 as shown in FIG. 38, and in particular
cooling pin 134 of heat conduction material of mist generation
department 139 is formed in a recess in the heat insulator of
second partition 125, and heat conducting pin heater 158 is formed
in this vicinity.
[0806] The air duct for cooling vegetable compartment 107 is formed
as shown in FIG. 38, in which at the inner side of vegetable
compartment 107, an air duct from the refrigerator compartment, or
outlet air-duct 252 for vegetable compartment making use of the air
duct from the freezer compartment is composed, and the air of
slightly lower temperature than in vegetable compartment 107 passes
through outlet air-duct 252 for vegetable compartment, and flows
out to the bottom from the inner side of lower basket 119 of
vegetable compartment 107 from outlet 124 for vegetable
compartment. The stream of the cold air flows from the bottom of
lower basket 119 to the front side, and flows into beverage
container 107a in the front part of the storage container, and
further flows into inlet 126 for vegetable compartment installed at
the lower side of second partition 125, and circulates into
evaporator 112 by way of inlet air-duct 253 for vegetable
compartment.
[0807] Upper basket 120 has a part at its bottom side disposed in
lower basket 119, and a plurality of air passage holes 107c are
provided in upper basket 120 disposed in lower basket 119.
[0808] The bottom of upper basket 120 is formed in a corrugated
shape made of convex and concave shapes.
[0809] Second partition 125 is mainly made of ABS or other resin in
its outlet wall, and the inside is made of foamed urethane or
foamed styrol, and vegetable compartment 107, freezer compartment
108, and cooling compartment 110 are thermally insulated, and
recess 111a is provided in a part of the wall at the inside of the
storage compartment so as to be lower in temperature than in other
parts, and electrostatic atomizing device 131 is installed in this
place as mist maker.
[0810] Second partition 125 fixing electrostatic atomizing device
131 is provided with heat conducting pin heater 158 near mist
generation department 139 for the purposes of regulating the
temperature of cooling pin 134 of heat conduction material provided
in electrostatic atomizing device 131, and preventing excessive dew
condensation in the peripheral area including atomizing electrode
135 at the tip of the department mist.
[0811] Cooling pin 134 of heat conduction material is fixed to
outlet wall 137, and cooling pin 134 itself has protrusion 134a
projecting from the outlet wall. This cooling pin 134 has
protrusion 134a at the reverse side of atomizing electrode 135, and
protrusion 134a is fitted into a corner of second partition 125 and
partition 251 at the rear side of the storage compartment.
[0812] Outlet wall 137 of electrostatic atomizing device 131 is
provided with atomizing port 132, and humidity supplying port 138
formed at a lower side of the inner side of the storage compartment
of outlet wall 137 perpendicular to the side forming atomizing port
132.
[0813] As a result, electrostatic atomizing device 131 including
cooling pin 134 is disposed in the thicket portion of the heat
insulation wall at the corner, and since the heat insulation wall
is thicker than in other parts, electrostatic atomizing device 131
can be buried deeper into the heat insulation wall, and loss of
inner volume of storage compartment due to installation of the mist
maker is suppressed. Therefore, the storage compartment of a large
capacity having the mist maker is realized, and at the same time
since the heat insulation is assured sufficiently, overcooling of
electrostatic atomizing device 131 and its vicinity can be
prevented, and decline of quality due to dew condensation in
peripheral parts can be avoided.
[0814] Hence, the back side of cooling pin 134 of heat conduction
material is set closer to the side of cooling compartment 110.
[0815] Herein, cooling pin 134 of heat conduction material is
cooled by using the cold air generated in cooling compartment 110,
and since cooling pin 134 is formed of a metal piece of excellent
heat conduction property, it can be cooled sufficiently only by
heat conduction from the cold air generated in evaporator 112.
[0816] Mist generation department 139 of electrostatic atomizing
device 131 is installed in a gap between lid 122 and upper basket
120, and the tip of the atomizing electrode is disposed toward
upper basket 120.
[0817] Depending on the case, as shown in FIG. 39 and FIG. 40,
atomizing electrode 135 may be installed in second partition 125 in
the perpendicular direction.
[0818] In this case, the cooling pin can be cooled by heat
conduction from freezer compartment 108, and a hole is formed in a
part of lid 122 so that the mist from electrostatic atomizing
device 131 may be atomized into the upper basket.
[0819] In the refrigerator having such configuration, the operation
and its effects are explained. The thickness of second partition
125 on which electrostatic atomizing device 131 is installed must
be large enough for thermally insulating freezer compartment 108,
cooling compartment 110, and the vegetable compartment, and is also
required have enough cooling capacity for cooling of cooling pin
134 to which atomizing electrode 135 at the tip of the department
mist is fixed, and the wall thickness of the location of which
electrostatic atomizing device 131 is smaller than in other parts.
The wall thickness of the deepest recess holding cooling pin 134 is
formed in a further small thickness. Hence, by heat conduction from
cooling compartment 110 at low temperature, cooling pin 134 can be
cooled, and atomizing electrode 135 can be cooled. When the tip
temperature of atomizing electrode 135 is set lower than the dew
point, the steam near atomizing electrode 135 condenses dew on
atomizing electrode 135, and water drops are generated
securely.
[0820] Due to ambient temperature fluctuations, the temperature
regulation in freezer compartment 108 may vary, and atomizing
electrode 135 may be overcooled, and the temperature of atomizing
electrode 135 is regulated by heat conducting pin heater 158
disposed near atomizing electrode 135, and the amount of water at
the tip of atomizing electrode 135 may be appropriately controlled.
Or radiant heater 114 may be used for regulating the temperature of
atomizing electrode 135.
[0821] Since atomizing port 132 and humidity supplying port 138
formed in outlet wall 137 form an air access, due to effects of air
convection in the storage compartment, an air flow is generated
including the area of atomizing electrode 135, and the air of
relatively high humidity due to transpiration from vegetables is
supplied efficiently and stably from humidity supplying port 138
into atomizing electrode 135, and water drops are generated and
applied on atomizing electrode 135 including its tip.
[0822] At this time, as the flow of cold air from vegetable
compartment 107, cold air at lower temperature than in the
vegetable compartment from outlet air-duct 252 for vegetable
compartment is discharged from outlet 124 for vegetable
compartment, and flows into the air duct formed between the storage
container in the bottom of lower basket 119 and the thermally
insulated cabinet, and further flows to the front door side. It
further flows into the storage container from vent hole 254 formed
in a part of lower basket 119, and thereby cools the beverage in
the beverage container. At this time, the inner side section of
lower basket 119 is cooled indirectly. The cold air further flows
into inlet 126 for vegetable compartment provided at the lower side
of second partition 125, and circulates into evaporator 112 by way
of inlet air-duct 253 for vegetable compartment. Thus, effects of
cold air are also smaller in the upper basket, and the freshness is
maintained.
[0823] In the preferred embodiment, therefore, the flow of cold air
in the vegetable compartment is controlled and utilized cleverly.
First, dry cold air at low temperature is abundantly supplied into
beverage container 107a in the front part of beverage partition
107b containing PET bottles and beverage cans, and by direct
contact with cold air at low temperature, the cooling speed is
enhance, and the cold air entering from the front side of the
vegetable compartment flows to the rear side and is gradually
raised in humidity, and by setting the humidity substantially
higher at the rear side than at the door side, the periphery of
electrostatic atomizing device 131 installed at the rear side is in
the atmosphere of high humidity, and a favorable environment for
condensing dew from the moisture in the air is formed around
electrostatic atomizing device 131. Further, the mist atomized by
electrostatic atomizing device 131 by using the water drops from
dew condensation of moisture in the storage compartment is a very
fine mist of nano level particle size and is strong in diffusion,
and fills upper basket 120, and flows down into lower basket 110,
and the humidity is maintained.
[0824] By thus controlling the flow of cold air, objects desired to
be cooled quickly are put in beverage container 107a in the front
part, and general vegetables and fruit relative resistant to low
temperature troubles are put in lower basket 119, and vegetables
and fruit relative less resistant to low temperature troubles are
put in upper basket 120, and cooling suited to the nature of the
objects is realized, and the vegetable compartment higher in
quality and higher in freshness can be presented.
[0825] In the preferred embodiment, in principle, mist is atomized,
but the cold air from outlet 124 for vegetable compartment may be
directly released to the PET bottle container, and the PET bottles
may be cooled quickly, and if mist atomizing device is not
installed, the cooling speed of PET bottles is enhanced, while the
humidity in upper basket 120 may be enhanced.
[0826] Therefore, if mist atomizing device is not installed, as in
the preferred embodiment, dry air at low temperature is used, and
by forming an air duct, so that dry cold air is first entered into
beverage container 107a in the door side portion of lower basket
119, and flows into upper basket 120 by way of lower basket 119
containing vegetables, the upper basket is kept humid and kept at
high temperature. In addition to this configuration, by further
atomizing mist, low temperature troubles can be suppressed by
synergistic effects.
[0827] Although not shown, by installing compartment temperature
sensor or compartment humidity sensor in the compartment, the dew
point can be calculated strictly depending on the compartment
environmental changes according to a predetermined formula.
[0828] A high voltage (for example, 7.5 kV) is applied between two
electrodes, that is, atomizing electrode 135 at negative voltage
side, and opposite electrode 136 at positive electrode side, from
voltage applicator 133. At this time, an air insulation layer is
broken between the electrodes, and a corona discharge takes place,
and the water of atomizing electrode 135 is atomized from the
electrode tip, and invisible nano level fine mist of less than 1
.mu.m having an electric charge is generated together with the
accompanying ozone and OH radicals.
[0829] The generated fine mist is atomized into upper basket 120.
The fine mist spayed from electrostatic atomizing device 131 is
negatively charged. On the other hand, the vegetable compartment
contains vegetables and fruit, and in particular the upper basket
often contains fruits and vegetable not resistant to low
temperature. These vegetables and fruit are often stored in
somewhat withered state due to transpiration when returning from
shop or transpiration during storage. These vegetables and fruit
are usually positively charged, and hence the atomized fine mist of
negative charge is likely to gather on the surface of vegetables.
When the vegetable compartment is set to high humidity again, the
atomized fine mist deposits on the surface of vegetables and fruit,
and transpiration from vegetables and fruit is suppressed, and the
freshness is enhanced. The moisture permeates into the tissues from
the gaps in cells of vegetables and fruit, and is transpired, and
the moisture is supplied again into the withered cells, and
withering is canceled by expansion of cells, and the vegetables are
refreshed, and at the same time, by the radicals contained in the
mist, the mist sterilizes, suppresses low temperature troubles,
increases nutrients, decomposes the agricultural chemicals by the
strong oxidizing power, and removes the agricultural chemicals
easily from the vegetable surface.
[0830] In the operation of the refrigerator, in the defrosting
operation of cooling compartment 110 executed at specific
intervals, the heat by radiant heater 114 heat the bottom of the
cooing chamber both by radiation and convection, and hence cooling
pin 134 is disposed near the cooling compartment, and atomizing
electrode 135 including cooling pin 134 is heated at specific
intervals. Hence, mist generation department 139 including
atomizing electrode 135 can be dried, if failure in mist-making
occurs due to abnormal dew condensation at the tip of the
department mist, a dry state is restored after a certain time, and
a normal mist-making state is recovered.
[0831] In outlet wall 137 of electrostatic atomizing device 131,
aside from atomizing port 132, humidity supplying port 138 into
atomizing electrode 135 is provided, at the inner side of outlet
wall 137 perpendicular to the side of forming atomizing port 132,
and an air access is formed, and due to effects of air convection
in storage compartment (vegetable compartment 107), an air flow is
also generated in atomizing electrode 135, and the moisture
(humidity) in the air in the storage compartment (vegetable
compartment 107) can be supplied into atomizing electrode 135
efficiently and stably, and dew condensation can be promoted, and
at the same time since humidity supplying port 138 is provided at
the inner side of outlet wall 137, and touch of user's hand to
voltage applicator 133 from humidity supplying port 138 is
prevented, and the safety is enhanced.
[0832] In particular, because of mist atomizing, in outlet wall
137, the environment is likely to cause generation of water scale
or electric leak through moisture, but since the humidity supplying
port is provided in the preferred embodiment, an air access is
formed, and an air flow is positively formed in outlet wall 137,
and moisture does not stay in outlet wall 137, but can be
circulated together with the flowing cold air.
[0833] As described herein, in the preferred embodiment, a
partition is provided for separating storage compartments, and a
low temperature storage compartment is provided at the ceiling side
of the storage compartment, and the electrostatic atomizing device
is provided in the partition of the ceiling, and therefore storage
compartments in freezing temperature zones such as cooling
compartment, freezer compartment and icemaker are installed in
upper parts, they are installed in the partition in the ceiling for
separating them, and the atomizing electrode of the electrostatic
atomizing device can be cooled by the cooling source, and dew can
be condensed, and any particular cooling device is not needed, and
the mist can be atomized from the ceiling, and it is easily
diffused in the entire storage container, and it is rarely touched
by the user's hand, and the safety is enhanced.
[0834] The mist generation department of the preferred embodiment
is intended to generate mist by electrostatic mist-making system,
and water drops are broken and pulverized by using electric energy
such as high voltage, and a fine mist is generated. Since the
generated mist is charged electrically, by charging the mist in
reverse polarity of the desired vegetables or fruit, for example,
by atomizing a negatively charged mist to positively charged
vegetables, the bonding force on vegetables and fruit is increased,
and the mist is more uniformly applied to the vegetable surface,
and as compared with the type of mist not charged, the mist bonding
rate is much improved. The fine mist can be directly atomized to
the food in the vegetable compartment, and by making use of the
potential between the fine mist and the vegetables, a fine mist can
be adhered to the vegetable surface, and the freshness can be
enhanced efficiently.
[0835] Moreover, since cooling pin 134 is fitted into a corner of
second partition 125 and partition 251 at the rear side of the
storage compartment, electrostatic atomizing device 131 including
cooling pin 134 is disposed in the thickest portion of the heat
insulation wall at the corner, and since the heat insulation wall
is thicker than in other parts, electrostatic atomizing device 131
can be buried deeper into the heat insulation wall. Therefore, the
loss of inner volume of storage compartment due to installation of
the mist maker is suppressed, and the storage compartment of a
large capacity having the mist maker is realized, and at the same
time since the heat insulation is assured sufficiently, overcooling
of electrostatic atomizing device 131 and its vicinity can be
prevented, and decline of quality due to dew condensation in
peripheral parts can be avoided.
[0836] Further, cooling pin 134 is fitted into a corner of
adjoining parts of second partition 125 and partition 251 at the
rear side of the storage compartment, and the cooling section for
cooing of the cooling pin is the bottom side of cooling compartment
110, and the warm air climbs up, and the cold air descends, and by
such characteristic, the portion of the lowest temperature in
cooling compartment 110 can be utilized as the cooling source, and
cooling pin 134 can be cooled more efficiently.
[0837] Moreover, since the bottom side of cooling compartment 110
is used as the cooling section for cooling of the cooling pin, the
bottom side of the cooling compartment of small temperature
fluctuation in the low-temperature air duct is used as the cooling
source, and the cooling pin can be cooled more stably.
[0838] At the time of defrosting of cooling compartment 110, the
heat by radiant heat 114 can be received in the vicinity, and
atomizing electrode 135 can be heated and dried at specific
intervals, and in the event of mist-making failure due to abnormal
dew condensation a the tip of the department mist, a dry state is
recovered in a certain time, and normal mist-making state can be
easily returned.
[0839] The replenish water in the preferred embodiment is dew
condensation water, not tap water supplied from outside. It is free
from minerals and impurities, and deterioration of the tip of the
atomizing electrode or deterioration of water retaining property
due to clogging can be prevented.
[0840] Since the mist of the preferred embodiment contains
radicals, and the agricultural chemicals and wax sticking to the
surface of vegetables can be decomposed and removed by an extremely
small amount of water, and the water is saved and the input is
lowered.
Preferred Embodiment 27
[0841] FIG. 41 is a sectional view near the vegetable compartment
in the refrigerator in preferred embodiment 27 of the present
invention.
[0842] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 26 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
26 or applicable to the same technical concept are omitted in
explanation.
[0843] As shown in the drawing, in the preferred embodiment, in the
highest part of refrigerator 100, refrigerator compartment 104 is
composed as a first storage compartment, and in the lower part of
refrigerator compartment 104, switchable temperature compartment
105 as a fourth storage compartment and icemaker 106 as a fifth
storage compartment are disposed side by side, freezer compartment
108 is formed in the lower part of switchable temperature
compartment 105 and icemaker 106, and vegetable compartment 107 is
formed in the further lower part of freezer compartment 108.
[0844] Second partition 125 of heat insulating property is provided
for separating the temperature zones of vegetable compartment 107
and freezer compartment 108, and partition 251 is formed at the
inner side of second partition 125 and at the inner side of freezer
compartment 108. Between partition 251 and thermally insulated
cabinet 101 of the refrigerator, evaporator 112 is installed, and
in its lower part, radiant heater 114 for thawing the frost
depositing on the evaporator is provided together with drain pan
115 for receiving the defrosted water. Cooling compartment 110 is
composed together with them including cooling fan 113 for conveying
cold air into the individual compartments. In the lower part of
cooling compartment 110, a cooling air-duct for mist device is
provided, and electrostatic atomizing device 131 is disposed in a
part of this air duct as shown in FIG. 41. In particular, cooling
pin 134 of heat conduction material of mist generation department
139 is very close to this air duct, and heat conducting pin heater
158 is formed in this periphery.
[0845] Upper basket 120 has a part at its bottom side disposed in
lower basket 119, and a plurality of air passage holes 107c are
provided in upper basket 120 disposed in lower basket 119.
[0846] The bottom of upper basket 120 is formed in a corrugated
shape made of convex and concave shapes.
[0847] Cooling air-duct 255 for mist device is mainly made of ABS,
PP or other resin and heat insulator such as foamed styrol, and the
cold air flowing through air duct 255 is relatively at low
temperature, about -15 to -25.degree. C., and at the inner side of
vegetable compartment 107, electrostatic atomizing device 131
including cooling pin 134 is installed in the partition opposite to
the cooling air-duct for mist device near the gap between the upper
basket and the lower basket. As a result, the configuration of the
vegetable compartment is nearly same as the configuration in
preferred embodiment 1.
[0848] In the refrigerator having such configuration, the operation
and its effects are explained. When cooling air-duct 255 for mist
device formed at the side of partition 251 on which electrostatic
atomizing device 131 is installed has enough cooling capacity for
cooling of cooling pin 134 to which atomizing electrode 135 at the
tip of the department mist is fixed, by transpiration from
contained vegetables, a high humidity state is established near
electrostatic atomizing device 131, and water drops are formed
securely at the tip of the department mist. The amount of water
drops can be adjusted by making use of heat conducting pin heater
158 and radiant heater 114.
[0849] In this state, a high voltage (for example, 7.5 kV) is
applied between two electrodes, that is, atomizing electrode 135 at
negative voltage side, and opposite electrode 136 at positive
electrode side, from voltage applicator 133. At this time, an air
insulation layer is broken between the electrodes, and a corona
discharge takes place, and the water of atomizing electrode 135 is
atomized from the electrode tip, and invisible nano level fine mist
of less than 1 .mu.m having an electric charge is generated
together with the accompanying ozone and OH radicals.
[0850] The generated fine mist is atomized between upper basket 120
and lower basket 119. The fine mist spayed from electrostatic
atomizing device 131 is negatively charged. On the other hand, the
vegetable compartment contains vegetables and fruit, and in
particular the upper basket often contains fruits and vegetable not
resistant to low temperature. These vegetables and fruit are often
stored in somewhat withered state due to transpiration when
returning from shop or transpiration during storage. These
vegetables and fruit are usually positively charged, and hence the
atomized fine mist of negative charge is likely to gather on the
surface of vegetables. When the vegetable compartment is set to
high humidity again, the atomized fine mist deposits on the surface
of vegetables and fruit, and transpiration from vegetables and
fruit is suppressed, and the freshness is enhanced. The moisture
permeates into the tissues from the gaps in cells of vegetables and
fruit, and is transpired, and the moisture is supplied again into
the withered cells, and withering is canceled by expansion of
cells, and the vegetables are refreshed, and at the same time, by
the radicals contained in the mist, the mist sterilizes, suppresses
low temperature troubles, increases nutrients, decomposes the
agricultural chemicals by the strong oxidizing power, and removes
the agricultural chemicals easily from the vegetable surface.
[0851] As described herein, the preferred embodiment includes
partitions for separating the storage compartments, and a cooling
air-duct for mist device for cooling of atomizing electrode, and
the electrostatic atomizing device is installed in this air duct,
and if the sections of freezing temperature zones such as cooling
compartment, freezer compartment and icemaker are disposed in upper
parts, these cold heat sources may be conveyed to the back side of
vegetable compartment by way of the air ducts, and the atomizing
electrode of the electrostatic atomizing device may be cooled by
these cooling sources to deposit dew, and stable mist atomizing is
realized, and by installing at the inner side, these parts are
hardly accessed by the user's hand, and the safety is enhanced.
[0852] The mist generation department of the preferred embodiment
is intended to generate mist by electrostatic mist-making system,
and water drops are broken and pulverized by using electric energy
such as high voltage, and a fine mist is generated. Since the
generated mist is charged electrically, by charging the mist in
reverse polarity of the desired vegetables or fruit, for example,
by atomizing a negatively charged mist to positively charged
vegetables, the bonding force on vegetables and fruit is increased,
and the mist is more uniformly applied to the vegetable surface,
and as compared with the type of mist not charged, the mist bonding
rate is much improved. The fine mist can be directly atomized to
the food in the vegetable compartment, and by making use of the
potential between the fine mist and the vegetables, a fine mist can
be adhered to the vegetable surface, and the freshness can be
enhanced efficiently.
[0853] Moreover, as the cooling section for cooling of cooling pin
134, a cooling air-duct for mist device independent from the
cooling air duct for cooling the ordinary storage compartment is
provided, and temperature fluctuations from the state of cooling
air duct can be suppressed more effectively, and by utilizing the
bottom side of the cooling compartment of smallest temperature
changes among the cold air passage as the cooling source, the
cooling pin can be cooled more stably.
[0854] The replenish water in the preferred embodiment is dew
condensation water, not tap water supplied from outside. It is free
from minerals and impurities, and deterioration of the tip of the
atomizing electrode or deterioration of water retaining property
due to clogging can be prevented.
[0855] Since the mist of the preferred embodiment contains
radicals, the agricultural chemicals and wax sticking to the
surface of vegetables can be decomposed and removed by an extremely
small amount of water, and the water is saved and the input is
lowered.
[0856] In the preferred embodiment, the air duct for mist maker is
used as cold heat source conveying means, but heat conduction of
aluminum, copper or other solid matter may be used, or heat
transfer part such as heat pipe or heat lane may be utilized. As a
result, air duct area is not required, and effects on compartment
volume may be reduced.
Preferred Embodiment 28
[0857] FIG. 42 is a sectional view of the refrigerator in preferred
embodiment 28 of the present invention. FIG. 43 is a simplified
cooling cycle diagram of the refrigerator in preferred embodiment
28 of the present invention. FIG. 44 is a detailed sectional view
near the electrostatic atomizing device.
[0858] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 27 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
27 or applicable to the same technical concept are omitted in
explanation.
[0859] As shown in the drawing, in the preferred embodiment, in the
highest part of refrigerator 100, refrigerator compartment 104 is
composed as a first storage compartment, and in the lower part of
refrigerator compartment 104, temperature changing chamber 301
changeable to vegetable compartment temperature of about 5.degree.
C. is composed, and freezer compartment 108 is formed in the lower
of temperature changing chamber 301. Temperature changing chamber
301 is composed of first partition 305 for thermally insulating
between the temperature zones of refrigerator compartment 104 and
temperature changing chamber 301, a second partition for thermally
insulating the temperature zone of temperature changing chamber
301, rear-end partition 313 of temperature changing chamber 301,
and door 118.
[0860] Refrigerator compartment 104 has higher temperature side
evaporator 304 contained in the inner wall of the rear-end of
refrigerator compartment as the cooling source, and temperature
changing chamber 301 and freezer compartment 108 are installed at
the inner side of freezer compartment 108, and lower temperature
side evaporator 303 installed in cooling compartment 110 is
utilized as the cooling source, and cooling fan 113 is disposed
above lower temperature side evaporator 303 in order to blow the
cold air generated in lower temperature side evaporator 303.
[0861] At the inner side of temperature changing chamber 301,
cooling air duct 311 on temperature changing chamber is provided,
and damper 302 is disposed in this air duct, and the temperature of
temperature changing chamber 301 is regulated, and electrostatic
atomizing device 131 is provided in rear end partition 313 of
temperature changing chamber for atomizing the mist into
temperature changing chamber 301.
[0862] The cooling cycle of the present invention discharges the
refrigerant from compressor 109, condenses in condenser 307, and
changes over a plurality of passages by three-way valve 308. A part
of the refrigerant is decompressed by capillary on higher
temperature side 310, is exchanged in heat in higher temperature
side evaporator 304, and passes through lower temperature side
evaporator 303 and an accumulator, and returns to compressor 109,
and the simultaneous cooling cycle of refrigerator compartment and
freezer compartment is formed, and other part is decompressed
capillary on lower temperature side 309, is exchanged in heat in
lower temperature side evaporator 303, and passes through an
accumulator, and returns to compressor 109, and the independent
cooling cycle of freezer compartment is formed.
[0863] Therefore, temperature changing chamber 301 makes use of the
cold air of lower temperature side evaporator 303, and the
temperature is properly regulated by the operation of cooling fan
113 and damper 302, compressor 109, and operation of three-way
valve 308.
[0864] The rear-end partition of temperature changing chamber 301
is mainly made of ABS or other resin in the outlet wall, and the
inside is composed of foamed styrol or the like, and temperature
changing chamber 301 and cooling air duct 311 on temperature
changing chamber 311 are thermally insulated, a recess is formed in
a part of the wall at the inside of the temperature changing
chamber so that the temperature may be lower than in other parts,
and electrostatic atomizing device 131 as the mist maker is
installed in this place.
[0865] Rear end partition 313 of temperature changing chamber for
fixing electrostatic atomizing device 131 is provided with heat
conducting pin heater 158 near mist generation department 139 for
the purposes of regulating the temperature of cooling pin 134 of
heat conduction material provided in electrostatic atomizing device
131, and preventing excessive dew condensation in the peripheral
parts including atomizing electrode 135 at the tip of the
department mist.
[0866] Cooling pin 134 of heat conduction material is fixed to
outlet wall 137, and cooling pin 134 has protrusion 134a projecting
from the outlet wall. Cooling pin 134 as protrusion 134a at the
reverse side of atomizing electrode 135, and protrusion 134a is
fitted into rear end partition 313 of temperature changing
chamber.
[0867] As a result, the back side of cooling pin 134 of heat
conduction material is at temperature of freezing temperature zone
disposed close to cooling air duct 311 on temperature changing
chamber.
[0868] Cooling pin 134 of heat conduction material is cooled by
using the cold air generated in cooling compartment 110 and blown
by cooling fan 113, and since cooling pin 134 is made of a metal
piece of excellent heat conduction, the cooling section is cooled
sufficiently only by heat conduction from the cold air generated in
lower temperature side evaporator 303. Damper 302 is installed at
the downstream side.
[0869] Mist generation department 139 of electrostatic atomizing
device 131 is installed in a gap between lower basket 119 and upper
basket 120, and the atomizing electrode tip is disposed toward this
gap.
[0870] Rear end partition 313 of temperature changing chamber in
which electrostatic atomizing device 131 is installed has a recess,
and electrostatic atomizing device 131 is disposed in this
place.
[0871] Cooling pin 134 of electrostatic atomizing device 131 is
covered with heat conducting pin cover 166 of heat resistant and
waterproof material such as PS, PP other resin so as to surround
the outer circumference, and is fitted into through-section 165 of
heat insulator 152 in this state.
[0872] At this time, heat conducting pin cover 166 fitted tightly
with heat insulator 152 in the surrounding, and when water deposits
on cooling pin 134, heat insulator 152 sticks, and invasion of
water into the inside of the heat insulator, and freezing and
breaking can be prevented.
[0873] End portion 134b of cooling pin 134 is formed in a
cylindrical shape in heat conducting pin cover 166 to assure the
cooling capacity from the back side, and only end portion 134b of
cooling pin 134 is opened, and opening 167 of through-section 165
is sealed with aluminum tape or other tape 194 adhered to heat
insulator 152 to shut off cold air.
[0874] End portion 134b of cooling pin 134 is adhered with tape
194, and the heat conduction is guaranteed.
[0875] Heat conducting pin cover 166 may be an adiabatic insulation
tape. However, considering a certain dimensional error, certain
void 196 is present between cooling pin 134 and heat conducting pin
cover 166, and this void 196 is filled up with void burying member
197d such as butyl, heat diffusion compound or heat conduction
holding material relatively excellent in heat conductivity and
capable of filling the void, and such material is buried between
cooling pin 134 and heat conducting pin cover 166.
[0876] Temperature changing chamber 301 can be changed from the
freezing temperature to wine storage temperature, and if necessary,
for example, a heater (not shown) for temperature regulation may be
installed in the peripheral area.
[0877] In the refrigerator having such configuration, the operation
ad its effects are described. First, the operation of the freezing
cycle is explained. Depending on a preset compartment temperature,
a signal is sent from the control circuit board (not shown), and
the freezing cycle is operated, and the cooling operation is
started. By the operation of compressor 109, the refrigerant of
high temperature and high pressure is discharged, and is somewhat
condensed and liquefied in condenser 307, and passes through a
refrigerant piping (not shown) laid down in the lateral side and
back side of the refrigerator main body (thermally insulated
cabinet 101), or the front opening of the refrigerator main body
(thermally insulated cabinet 101), and is further condensed and
liquefied while preventing dew condensation on the refrigerator
main body (thermally insulated cabinet 101), and reaches up to
three-way valve 308. Herein, the path of three-way valve 308 is
determined by the operation signal from the control circuit board
of refrigerator 100, and the refrigerant is passed into either
capillary on lower temperature side 309 or capillary on higher
temperature side, or into both. When the path of three-way valve
308 is opened to the capillary on higher temperature side, a liquid
refrigerant of low temperature and low pressure is formed in
capillary on higher temperature side 310, and flows into higher
temperature side evaporator 304.
[0878] Herein, the liquid refrigerant of low temperature and low
pressure in higher temperature side evaporator 304 is at a
temperature of about -10.degree. C. to -20.degree. C., and it is
directly or indirectly exchanged in heat with the air in
refrigerator compartment 104, and a part of the refrigerant in
higher temperature side evaporator 304 is evaporated. Further, it
flows through the refrigerant piping, and reaches lower temperature
side evaporator 303.
[0879] It further flows through the accumulator (not shown) and
returns to compressor 109 in the cooling cycle operation.
[0880] On the hand, when the path of three-way valve 308 is opened
to the capillary on lower temperature side 309, a liquid
refrigerant of low temperature and low pressure is formed in
capillary on lower temperature side 309, and flows into lower
temperature side evaporator 303.
[0881] Herein, the liquid refrigerant of low temperature and low
pressure is at a temperature of about -20.degree. C. to -30.degree.
C., and the air in the cooling compartment is exchanged in heat by
convection by cooling fan 113, and almost all refrigerant in lower
temperature side evaporator 303 is evaporated. This cold air is
blown into freezer compartment 108 or temperature changing chamber
301 by cooling fan 113. The heat-exchanged refrigerant flows
through the accumulator and returns to compressor 109.
[0882] On the other hand, in lower temperature side evaporator 303
in cooling compartment 110, a cold air is discharged by cooling fan
113, and passes through cooling air duct 312 on freezer compartment
in rear en partition 314 of freezer compartment, and is discharged
into freezer compartment 108 from a discharging port. The
discharged cold air exchanges in heat with the freezer compartment
case, and is sucked into the lower part of rear end partition 314
of freezer compartment, and returns to cooing chamber 110 having
lower temperature side evaporator 303.
[0883] A part of the cold air discharged by cooling fan 113 flows
into cooling air duct 311 on temperature changing chamber in rear
end partition 313 of temperature changing chamber. The cold air
flowing into cooling air duct 311 on temperature changing chamber
passes through damper 302, and is discharged into temperature
changing chamber 301 from a discharging port, and is exchanged in
heat in temperature changing chamber 301, and sucked into a duct at
the back side, and is returned to cooling compartment 110. At this
time, by the temperature detector installed in temperature changing
chamber 301, damper 302 is determined in its opening or closing
operation, and the volume of cold air passing through the damper is
controlled, so that the temperature is controlled constantly in
temperature changing chamber 301.
[0884] Herein, temperature changing chamber 301 is a chamber in
which an arbitrary temperature can be set, practically from
freezing temperature zone of about -20.degree. C. to about
5.degree. C. of vegetable compartment, or about 12.degree. C. of
wine cellar. Hence it may be also used as vegetable compartment for
storing vegetables and fruit.
[0885] Accordingly, when the temperature setting of temperature
changing chamber 301 is about vegetable storing temperature, for
example, 2.degree. C. or higher, electrostatic atomizing device 131
is put in operation, and the freshness of the contents is
enhanced.
[0886] Herein, in temperature changing chamber 301, in a part of
the location of relatively high humidity environment of rear end
partition 313 of temperature changing chamber, the heat insulator
is thinner in wall thickness than in other parts, and deepest
recess 111b is formed behind cooling pin 134 in particular. Hence,
recess 111a is formed in rear end partition 313 of temperature
changing chamber, and in deepest recess 111b at the rearmost side
of recess 111a, electrostatic atomizing device 131 in a shape
having projecting protrusion 134a of cooling pin 134 is fitted and
fixed.
[0887] In cooling air duct 311 on temperature changing chamber at
the back side of cooling pin 134, a cold air of about -15.degree.
C. to -25.degree. C. generated at the side of evaporation tray 303
on lower temperature side by operation of cooling system, and blown
by cooling fan 113 is flowing, and by heat conduction from air duct
surface, cooling pin 134 of heat conduction material is cooled to,
for example, about 0 to -10.degree. C. At this time, since cooling
pin 134 is a heat conduction material, the cold heat is conveyed
quickly, and atomizing electrode 135 at the tip of the department
mist is cooled indirectly to about 0 to -10.degree. C. by way of
cooling pin 134.
[0888] In this case, when damper 302 is opened, the cold air
directly flows into temperature changing chamber 301, and the
temperature changing chamber is set in low humidity state. When
damper 302 is closed, dry air does not flow into the temperature
changing chamber, and the temperature changing chamber is
relatively at high humidity, and the temperature in the cooling air
duct in the temperature changing chamber at the back side of
cooling pin 134 is maintained at a relatively low temperature.
[0889] Herein, when the temperature setting of temperature changing
chamber 301 is the setting of vegetable compartment, the
temperature is 2.degree. C. to 7.degree. C., and the humidity is
relatively high due to transpiration from vegetables, and if
atomizing electrode 135 at the tip of the department mist of
electrostatic atomizing device 131 becomes lower than the
temperature of dew point, water is generated and water drops
deposit on atomizing electrode 135 including its peripheral
parts.
[0890] A negative voltage is applied to atomizing electrode 135 of
a tip of the department mist having water drops, and a positive
voltage to opposite electrode 136, and a high voltage (for example,
4 to 10 kV) is applied between these electrodes from voltage
applicator 133. At this time, a corona discharge occurs between
these electrodes, and water drops at the tip of atomizing electrode
135 are pulverized by an electrostatic energy, and since the water
drops are charged electrically, by Rayleigh scattering, a very fine
mist of changed nano level having an invisible particle size at the
level of several nanometers is generated, accompanying ozone and OH
radicals. The voltage applied between the electrodes is very high,
about 4 to 10 kV, but the discharge current value at this time is
several .mu.A levels, and the input is very low, about 0.5 to 1.5
W.
[0891] More specifically, supposing atomizing electrode 135 at
reference potential side (0 V) and opposite electrode 136 at high
voltage side (+7 kV), the dew condensation water deposits on the
leading end of atomizing electrode 135, and an air insulation layer
between atomizing electrode 135 and opposite electrode 136 is
destroyed, and discharge is caused by an electrostatic force. At
this time, the dew condensation water is electrically charged, and
fine particles are formed. Further, since opposite electrode 136 is
at a positive side, the charged fine mist is attracted, and liquid
drops are further pulverized, and a fine mist of invisible nano
level having an electric charge of several nm level containing
radicals is attracted to opposite electrode 136, and its inertial
force causes the fine mist to be atomized toward the storage
compartment (temperature changing chamber 301).
[0892] Herein, cooling pin 134 is cooled from cooing air duct 311
on temperature changing chamber by way of tape 194 or void burying
member 197d, or cooled from the heat insulator at the cooling pin
lateral side. When cooled indirectly by a dual structure by way of
tape 194, void 196 may be formed between heat conducting pin cover
166 and tape 194 due to processing precision, and if void 196 is
formed, the heat conductivity becomes poor in this space, and
cooling pin 134 may not be cooled sufficiently, and the temperature
of cooling pin 134 or the temperature of atomizing electrode 135
may fluctuate, and dew condensation may be disturbed at the
atomizing electrode tip depending on the circumstance.
[0893] To prevent these troubles, at the time of assembling, tight
contacting of tape 194 and cooling pin 134 should be checked, or if
possibility of forming of void is suspected, void 196 is filled
with void burying member 197d such as butyl, heat diffusion
compound or heat conduction holding material, and the heat
conduction from tape 194 to cooling pin 134 is assured, and the
cooling capacity on atomizing electrode 135 is guaranteed.
[0894] Further, there is no gap between heat conducting pin cover
166 and through-section 165, and opening 167 of through-section 165
shuts off invasion of cold air from the cooling air duct adjacent
from tape 194, and low temperature cold air does not leak into the
compartment, and dew condensation or low temperature troubles will
not occur in storage compartment (temperature changing chamber 301)
or its peripheral parts.
[0895] To prevent heat conduction deterioration by forming of voids
between heat conducting pin cover 166 and cooling pin 134 due to
inevitable error in processing precision or assembling precision,
voids 196 can be filled up with butyl or other heat conduction
material, and the heat conductivity is assured, and the cooling
capacity is guaranteed. Voids 196 formed between tape 194 and
cooling pin 134 can be filled up by filling voids 196 with butyl or
other heat conduction material, and the heat conductivity can be
assured.
[0896] Since there is no gap between heat conducting pin cover 166
and through-section 165, invasion of water into the heat insulator
formed of foamed styrol can be prevented, and it is effective to
prevent permeation of water into the heat insulator, freezing of
the permeation area, and application of stress in the area by
expansion of volume of water, and accompanying cracking and
breaking, and the quality is assured more securely.
[0897] Besides, opening 167 of through-section 165 shuts off
invasion of cold air from the cooling air duct adjacent from tape
194, and cold air does not leak into the compartment, and dew
condensation or low temperature troubles will not occur in storage
compartment (temperature changing chamber 301) or its peripheral
parts.
[0898] By these cooling effects, dew condensate on atomizing
electrode 135, and a high voltage discharge occurs between opposite
electrode 136 and atomizing electrode 135, and the generated fine
mist passes through atomizing port 132 formed in outlet wall 137 of
electrostatic atomizing device 131, and is atomized into
temperature changing chamber 301, but since the particle size is
very small, the diffusion power is strong, and the fine mist
reaches all parts of temperature changing chamber 301. Since the
atomized fine mist is generated by high voltage discharge, it is
charged negatively, while temperature changing chamber 301 contains
positively charged vegetables and fruit, and the atomized mist is
likely to gather on the surface of vegetables and the freshness is
enhanced.
[0899] As far as possible to atomize, the temperature is not
particularly specified. For example, if the temperature changing
chamber is set at partial temperature of about -2.degree. C.,
freezing temperature of about 0.degree. C., or chilled temperature
zone of about 1.degree. C., as far as it is judged that the mist
can be atomized from electrostatic atomizing device 131, only by
atomizing, a fine mist deposits on the surface of fresh food, and
the bactericidal property is enhanced, and storage for a long
period may be realized.
[0900] If temperature changing chamber 301 is set at wine storing
temperature, damper 302 is almost closed, and the humidity is
relatively high in the storage compartment, and growth of mold may
be possible, but it can be prevented by atomizing a mist having
strong oxidizing radicals.
[0901] If temperature changing chamber 301 is set in temperature
zone judged to be impossible to atomize such as freezing setting,
or if the operation of electrostatic atomizing device 131 can be
freely stopped by manual button or the like, the electrostatic
atomizing device can be stopped.
[0902] By judging the operation of electrostatic atomizing device
131 by the damper opening and closing operation, electrostatic
atomizing device 131 can be operated efficiently.
[0903] Further, by disposing a heater for regulating the
temperature near cooling pin 134 of electrostatic atomizing device
131, the temperature of the atomizing electrode can be regulated,
and the water volume at the atomizing electrode tip can be
regulated, and a more stable mist making state can be realized.
[0904] Thus, in the preferred embodiment, the refrigerator having a
plurality of evaporators is provided with a partition for
separating a temperature changing chamber for varying the
temperature and its storage compartment, and has a cooling air duct
on temperature changing chamber for cooling the temperature
changing chamber, and the electrostatic atomizing device is
installed on the rear partition for separating the air duct and the
storage compartment. Hence, when the temperature setting in the
temperature changing chamber is the temperature setting in the
vegetable compartment, the atomizing electrode can be cooled by
heat conduction from the air duct flowing into the temperature
changing chamber, and the dew can be condensed, and stable
atomizing is realized. Since it is installed at the inner side, it
is hardly accessed by the user's hand, and the safety is
enhanced.
[0905] In the preferred embodiment, if the damper is closed, the
temperature of the air duct at the back side of the temperature
changing chamber is at the upstream side of the damper, and a
relatively low temperature is maintained, and the atomizing
electrode can be cooled sufficiently, and dew can be condensed at
the tip of the atomizing electrode, and the mist can be
generated.
[0906] The mist generation department of the preferred embodiment
is designed to generate mist by electrostatic mist-making system,
and water drops are broken and pulverized by using an electric
energy of high voltage, and a fine mist is generated. Since the
generated mist is charged electrically, by charging the mist in
reverse polarity of the desired vegetables and fruit, for example,
by atomizing a mist of negative charge to the vegetables of
positive charge, the bonding force on the vegetables and fruit is
enhanced, and the mist can be more uniformly bonded on the
vegetable surface, and as compared with the mist of the type not
charged, the mist bonding rate is substantially improved. The
atomized mist can be directly applied on the food in the vegetable
crisper, and a fine mist can be applied on the vegetable surface by
making use of the potential of the fine mist and the vegetables,
and the freshness may be further enhanced.
[0907] The damper of the preferred embodiment is a motor-driven
damper, and there is no limitation of the temperature setting
(operating temperature) due to limitation of the mechanical damper,
and the temperature changing chamber can be controlled at a desired
temperature, and the temperature suited to various foods can be
determined.
[0908] Although impossible in mechanical damper, force closing is
possible, and when the temperature changing chamber is not used, it
is not required to circulate the cold air in the temperature
changing chamber, and by closing the motor-driven damper by force,
useless cooling is prevented, and the power consumption can be
suppressed. When defrosting the lower temperature side evaporator
in the cooling compartment, by closing the motor-driven damper by
force, invasion of warm humidity into the temperature changing
chamber can be prevented, and the frosting is prevented and
defrosting efficiency is enhanced, and the power consumption can be
suppressed, and the atomizing electrode can be heated at the same
time, and it serves as a drying unit of the atomizing electrode,
and the reliability is enhanced.
[0909] Moreover, the damper of the preferred embodiment is a
temperature controlling chamber fan capable of varying the rotating
speed, and the cold air volume to the temperature changing chamber
can be adjusted, and it is free from restriction of the temperature
setting (operating temperature) required in the mechanical damper,
and temperature changing chamber 301 can be controlled at a desired
temperature, and the temperature suited to each food can be
created. In addition, cooling speed can be controlled, such as
quick cooling or slow cooling and the freshness of the food is
further enhanced.
[0910] In the preferred embodiment, the temperature changing
chamber is the storage compartment having the electrostatic
atomizing device, but it may be realized by a vegetable compartment
limited in the temperature zone more strictly. As a result, the
temperature fluctuation range is smaller, and a simpler control
specification is realized.
Preferred Embodiment 29
[0911] FIG. 45 is a sectional view of the refrigerator in preferred
embodiment 29 of the present invention. FIG. 46 is a sectional view
near the electrostatic atomizing device in preferred embodiment 29
of the present invention.
[0912] In this preferred embodiment, only the portions different
from the configuration specifically described in the foregoing
preferred embodiments are explained, and the portions similar to
the configuration specifically described in the foregoing preferred
embodiments or applicable to the same technical concept are omitted
in explanation.
[0913] As shown in the drawing, in the preferred embodiment, in the
highest part of refrigerator 100, refrigerator compartment 104 is
composed as a first storage compartment, and in the lower part of
refrigerator compartment 104, temperature changing chamber 301
changeable to vegetable compartment temperature of about 5.degree.
C. is composed, and freezer compartment 108 is formed in the lower
of temperature changing chamber 301. Temperature changing chamber
301 is composed of partition 321 for thermally insulating between
the temperature zones of refrigerator compartment 104 and
temperature changing chamber 301, a second partition for thermally
insulating the temperature zone of temperature changing chamber
301, inner case 103 at the inner side of temperature changing
chamber 301, and door 118.
[0914] Refrigerator compartment 104 and temperature changing
chamber 301 utilize higher temperature side evaporator 304 disposed
in the inner wall at the inner side of the refrigerator compartment
and at the inner side of the temperature changing chamber as the
cooling source, and freezer compartment 108 utilizes lower
temperature side evaporator 303 provided in cooling compartment
disposed at the inner side of freezer compartment 108 as the
cooling source, and cooling fan 113 is provided in the upper part
of lower temperature side evaporator 303 for blowing the cold air
generated in lower temperature side evaporator 303.
[0915] At the inner side of temperature changing chamber 301,
electrostatic atomizing device 131 is composed for atomizing a mist
into temperature changing chamber 301.
[0916] The cooling cycle of the present invention discharges the
refrigerant from compressor 109, condenses in condenser 307, and
changes over a plurality of channels by three-way valve 308. A part
of the refrigerant is decompressed by capillary on higher
temperature side 310, is exchanged in heat in higher temperature
side evaporator 304, and passes through lower temperature side
evaporator 303 and an accumulator, and returns to compressor 109,
and the simultaneous cooling cycle of refrigerator compartment and
freezer compartment is formed, and other part is decompressed in
capillary on lower temperature side 309, is exchanged in heat in
lower temperature side evaporator 303, and passes through an
accumulator, and returns to compressor 109, and the independent
cooling cycle of freezer compartment is formed.
[0917] Therefore, temperature changing chamber 301 makes use of
higher temperature side evaporator 304, and the temperature is
properly regulated by a refrigerator compartment temperature
detector (not shown) or a temperature changing compartment
temperature detector (not shown), compressor 109, and three-way
valve 308.
[0918] Inner case 103 at the rear side of temperature changing
chamber 301 is mainly made of ABS or other resin, and electrostatic
atomizing device 131 as the mist maker is installed in a part of
this inner case.
[0919] Inner case 103 for fixing electrostatic atomizing device 131
is provided with heat conducting pin heater 158 near mist
generation department 139 for the purposes of regulating the
temperature of cooling pin 134 of heat conduction material provided
in electrostatic atomizing device 131, and preventing excessive dew
condensation in the peripheral parts including atomizing electrode
135 at the tip of the department mist.
[0920] Cooling pin 134 of heat conduction material is fixed to
outlet wall 137, and cooling pin 134 has protrusion 134a projecting
from the outlet wall. Cooling pin 134 has protrusion 134a at the
reverse side of atomizing electrode 135, and protrusion 134a is
fitted into a recess formed in a part of inner case 103.
[0921] It is hence disposed closer to higher temperature side
evaporator 304 at the back side of cooling pin 134 of heat
conduction material.
[0922] In the refrigerator having such configuration, the operation
ad its effects are described. First, the operation of the freezing
cycle is explained.
[0923] Depending on a preset compartment temperature, a signal is
sent from the control circuit board (not shown), and the freezing
cycle is operated, and the cooling operation is started. By the
operation of compressor 109, the refrigerant of high temperature
and high pressure is discharged, and is somewhat condensed and
liquefied in condenser 307, and passes through a refrigerant piping
(not shown) laid down in the lateral side and back side of the
refrigerator main body (thermally insulated cabinet 101), or the
front opening of the refrigerator main body (thermally insulated
cabinet 101), and is further condensed and liquefied while
preventing dew condensation on the refrigerator main body
(thermally insulated cabinet 101), and reaches up to three-way
valve 308. Herein, the channel of three-way valve 308 is determined
by the operation signal from the control circuit board of
refrigerator 100, and the refrigerant is passed into either
capillary on lower temperature side 309 or capillary on higher
temperature side, or into both. When the channel of three-way valve
308 is opened to the capillary on higher temperature side, a liquid
refrigerant of low temperature and low pressure is formed in
capillary on higher temperature side 310, and flows into higher
temperature side evaporator 304.
[0924] Herein, the liquid refrigerant of low temperature and low
pressure in higher temperature side evaporator 304 is at a
temperature of about -10.degree. C. to -20.degree. C., and it is
directly or indirectly exchanged in heat with the air in
refrigerator compartment 104 or temperature changing chamber, and a
part of the refrigerant in higher temperature side evaporator 304
is evaporated. Further, it flows through the refrigerant piping,
and reaches lower temperature side evaporator 303.
[0925] Further the refrigerant flows through the accumulator (not
shown) and returns to compressor 109 in the cooling cycle
operation.
[0926] On the hand, when the channel of three-way valve 308 is
opened to the capillary on lower temperature side 309, a liquid
refrigerant of low temperature and low pressure is formed in
capillary on lower temperature side 309, and flows into lower
temperature side evaporator 303.
[0927] Herein, the liquid refrigerant of low temperature and low
pressure is at a temperature of about -20.degree. C. to -30.degree.
C., and the air in the cooling compartment is exchanged in heat by
convection by cooling fan 113, and almost all refrigerant in lower
temperature side evaporator 303 is evaporated. This cold air is
blown into freezer compartment 108 by way of cooling fan 113. The
heat-exchanged refrigerant flows through the accumulator and
returns to compressor 109.
[0928] On the other hand, in lower temperature side evaporator 303
in cooling compartment 110, a cold air is discharged by cooling fan
113, and passes through cooling air duct 312 on freezer compartment
in rear end partition 314 of freezer compartment, and is discharged
into freezer compartment 108 from a discharging port. The
discharged cold air exchanges in heat with the freezer compartment
case, and is sucked into the lower part of rear end partition 314
of freezer compartment, and returns to cooing chamber 110 having
lower temperature side evaporator 303.
[0929] The channel to capillary on higher temperature side 310 is
opened by the three-way valve, and refrigerator compartment 104 and
temperature changing chamber 301 are cooled. At this time, by the
temperature detector installed in refrigerator compartment 104 or
temperature changing chamber 301, opening or closing of the
three-way valve is determined, so that the temperature is
controlled constantly in refrigerator compartment 104 or
temperature changing chamber 301.
[0930] Herein, temperature changing chamber 301 is a chamber in
which an arbitrary temperature can be set, practically from about
-2.degree. C. in partial chilling temperature zone, or about
5.degree. C. of vegetable compartment, to about 12.degree. C. of
wine cellar. Hence it may be also used as vegetable compartment for
storing vegetables and fruit.
[0931] Accordingly, when the temperature setting of temperature
changing chamber 301 is about vegetable storing temperature, for
example, 2.degree. C. or higher, electrostatic atomizing device 131
is put in operation, and the freshness of the contents is
enhanced.
[0932] Herein, in temperature changing chamber 301, in a part of
the location of relatively high humidity environment of inner case
103 at the inner side, electrostatic atomizing device 131 is
disposed, and the rear part of cooling pin 134 is close to higher
temperature side evaporator 304.
[0933] In higher temperature side evaporator 304 at the back side
of cooling pin 134, by the operation of the cooling system, the
refrigerant tube or fin or heat transfer material is cooled to a
temperature of about -15 to -25.degree. C., and by the heat
conduction from them, cooling pin 134 of heat conduction material
is cooled to about 0 to -10.degree. C. At this time, since cooling
pin 134 is a heat conduction material, the cold heat is conveyed
quickly, and atomizing electrode 135 at the tip of the department
mist is cooled indirectly to about 0 to -10.degree. C. by way of
cooling pin 134.
[0934] In this way, cooling pin 134 is cooled by direct heat
conduction from the evaporation tray.
[0935] Therefore, the cooling section for cooling of cooling pin
134 is not low temperature air from the air duct, but is the direct
heat conduction from the evaporation tray kept at nearly constant
evaporation temperature, and the cooling pin can be cooled more
stably, and the thermal capacity is increased by the evaporation
tray and the refrigerant, and a stable temperature is realized.
[0936] Herein, when three-way valve 308 is set to open the channel
for the capillary on higher temperature side, refrigerator
compartment 104 and temperature changing chamber 301 are set in the
cooling mode, and the temperature changing chamber is in low
humidity state. On the other hand, three-way valve 308 is set to
close the channel for the capillary on higher temperature side, the
temperature changing chamber 301 is in a relatively high humidity
state, and a certain low temperature is maintained in higher
temperature side evaporator 304 at the back side of cooling pin
134.
[0937] If the temperature setting in temperature changing chamber
301 is the vegetable compartment setting, the temperature is
2.degree. to 7.degree. C., and the humidity is relatively high due
to transpiration from vegetables, and atomizing electrode 135 at
the tip of the department mist of electrostatic atomizing device
131 is below the temperature of dew point, water is generated in
atomizing electrode 135 including its tip, and water drops deposit,
and a fine mist having radicals is generated by application of high
voltage.
[0938] This fine mist passes through atomizing port 132 formed
outlet wall 137 of electrostatic atomizing device 131, and is
atomized into temperature changing chamber 301, and since the
particle size is very small, the diffusion is very strong, and the
fine mist reaches all parts in temperature changing chamber 301.
Since the fine mist being atomized is generated by high voltage
discharge, and is negatively charged, while temperature charging
chamber 301 contains vegetables and fruit being charged positively,
and the atomized mist is likely to gather on the surface of
vegetables and the freshness is enhanced.
[0939] As far as atomizing is possible, the temperature is not
specified. For example, if the temperature changing chamber is set
at about -2.degree. C. of partial temperature, about 0.degree. C.
of icing, or about 1.degree. C. of chilling, as far as it is judged
possible to atomize from electrostatic atomizing device 131, by
atomizing, fine mist deposits on the surface of fresh food, and the
sterilizing effect is enhanced, and the food can be stored for a
long period.
[0940] A more efficient mist atomizing is realizing by interlocking
the operation of three-way valve 308 and the operation of
electrostatic atomizing device 131.
[0941] Near cooling pin 134 of electrostatic atomizing device 131,
a heater may be disposed for the purpose of regulating the
temperature, and the temperature control of the atomizing electrode
and the water volume adjustment at the tip of the department mist
may be enabled, and a further stable mist-making state is
realized.
[0942] Thus, in the preferred embodiment, the refrigerator having a
plurality of evaporator trays, a temperature changing chamber for
varying the temperature, and an evaporation tray for cooling the
temperature changing chamber are provided, are the temperature
changing chamber is cooled by utilizing the evaporation tray for
cooling the refrigerator compartment, and the electrostatic
atomizing device is provided in a part of the inner case at the
inner side of the temperature changing chamber, and when the
temperature setting in the temperature changing chamber is the
temperature setting in the vegetable compartment, the atomizing
electrode can be cooled by heat conduction from the higher
temperature side evaporator, and dew can be condensed, and stable
atomizing is possible, and since it is installed at the inner side,
it is hardly accessed by the user's hand, and safety is enhanced,
and moreover the number of parts can be saved, and the structure is
more inexpensive.
[0943] In the preferred embodiment, the cooling pin is cooled
direct heat conductor from the evaporation tray, but as far as the
temperature of the mist generation department is appropriate, it
may be cooled indirectly by disposing a resin or a heat insulator.
As a result, the electrostatic atomizing device can be assembled
near the evaporation tray, and the number of processes and the
management for guarantee heat conduction can be saved.
Preferred Embodiment 30
[0944] FIG. 47 is a sectional view of the refrigerator in preferred
embodiment 30 of the present invention. In this preferred
embodiment, only the portions different from the configuration
specifically described in preferred embodiments 1 to 29 are
explained, and the portions similar to the configuration
specifically described in preferred embodiments 1 to 29 or
applicable to the same technical concept are omitted in
explanation.
[0945] As shown in the drawing, in the preferred embodiment, in the
highest part of refrigerator 100, refrigerator compartment 104 is
composed as a first storage compartment, and in the lower part of
refrigerator compartment 104, temperature changing chamber 301
changeable to vegetable compartment temperature of about 5.degree.
C. is composed, and freezer compartment 108 is formed in the lower
of temperature changing chamber 301.
[0946] Temperature changing chamber 301 is composed of partition
board 321 for partitioning between the temperature zones of
refrigerator compartment 104 and temperature changing chamber 301,
a second partition for thermally insulating the temperature zone of
temperature changing chamber 301, partition board 321 at inner side
of temperature changing chamber 301, and door 118, and discharge
port 325 from temperature changing chamber is provided in a part of
partition board 321.
[0947] Partition 323 in refrigerator compartment is provided at the
inner side of refrigerator compartment 104 and temperature changing
chamber 301, and this partition is formed up to the inner side of
temperature changing chamber 301, and air duct 324 in refrigerator
compartment is disposed across a spacing, and sucking port 326 to
temperature changing chamber is composed at one end thereof. Higher
temperature side evaporator 304 is formed in the inside, and fan
322 for refrigerator compartment is installed in the upper part of
higher temperature side evaporator 304, and a cold air is blown
into the refrigerator compartment.
[0948] In a part of partition board 321 at the inner side of
temperature changing chamber 301, electrostatic atomizing device
131 for atomizing a mist into temperature changing chamber 301 is
composed.
[0949] Partition board 321 at the back side of temperature changing
chamber 301 is composed mainly of ABS or other resin and foamed
styrol or other heat insulator, and electrostatic atomizing device
131 as mist maker is disposed in a part of its inner case.
[0950] Partition board 321 for fixing electrostatic atomizing
device 131 is provided with heat conducting pin heater 158 disposed
near mist generation department 139, for the purposes of regulating
the temperature of cooling pin 134 of heat conduction material
disposed in electrostatic atomizing device 131, and preventing
excessive dew condensation in the peripheral parts including
atomizing electrode 135 at the tip of the department mist.
[0951] Cooling pin 134 of heat conduction material is fixed to
outlet wall 137, and cooling pin 134 has protrusion 134a projecting
from the outlet wall. Cooling pin 134 has protrusion 134a at the
reverse side of atomizing electrode 135, and protrusion 134a is
fitted into a recess formed in a part of partition board 321.
[0952] The back side of cooling pin 134 of heat conduction material
is hence disposed closer to higher temperature side evaporator
304.
[0953] In the refrigerator having such configuration, the operation
ad its effects are described. When the channel of three-way valve
308 is opened to capillary on higher temperature side 310,
refrigerator compartment 104 and temperature changing chamber 301
are cooled. At this time, by the temperature detector installed in
refrigerator compartment 104 or temperature changing chamber 301,
the opening or closing of the three-way valve and the operation of
fan 322 for refrigerator compartment are determined, and the
temperature of refrigerator compartment 104 and temperature
changing chamber 301 is kept constant.
[0954] Herein, temperature changing chamber 301 is a chamber in
which an arbitrary temperature can be set, practically from about
-2.degree. C. in partial temperature zone, or about 5.degree. C. of
vegetable compartment, to about 12.degree. C. of wine cellar. Hence
it may be also used as vegetable compartment for storing vegetables
and fruit.
[0955] Accordingly, when the temperature setting of temperature
changing chamber 301 is about vegetable storing temperature, for
example, 2.degree. C. or higher, electrostatic atomizing device 131
is put in operation, and the freshness of the contents is
enhanced.
[0956] Herein, in temperature changing chamber 301, in a part of
the location of relatively high humidity environment of partition
board 321 at the inner side, electrostatic atomizing device 131 is
disposed, and the rear part of cooling pin 134 is close to higher
temperature side evaporator 304.
[0957] In higher temperature side evaporator 304 at the back side
of cooling pin 134, by the operation of the cooling system, the
refrigerant tube or fin or heat transfer material is cooled to a
temperature of about -15 to -25.degree. C., and by the heat
conduction from them, cooling pin 134 of heat conduction material
is cooled to about 0 to -10.degree. C. At this time, since cooling
pin 134 is a heat conduction material, the cold heat is conveyed
quickly, and atomizing electrode 135 at the tip of the department
mist is cooled indirectly to about 0 to -10.degree. C. by way of
cooling pin 134.
[0958] Herein, when three-way valve 308 is set to open the channel
for the capillary on higher temperature side, refrigerator
compartment 104 and temperature changing chamber 301 are set in the
cooling mode, and the temperature changing chamber is in low
humidity state. On the other hand, three-way valve 308 is set to
close the channel for the capillary on higher temperature side, the
temperature changing chamber is in a relatively high humidity
state, and fan 322 for refrigerator compartment is put in
operation, and the frost deposited on the higher temperature side
evaporator is thawed and removed, and at this time, temperature
changing chamber 301 is in a relatively high humidity space.
Therefore, mist-making is realized if the temperature elevated in
higher temperature side evaporator 304 at the back side of cooling
pin 134.
[0959] If the temperature setting in temperature changing chamber
301 is the vegetable compartment setting, the temperature is
2.degree. to 7.degree. C., and the humidity is relatively high due
to transpiration from vegetables, and atomizing electrode 135 at
the tip of the department mist of electrostatic atomizing device
131 is below the temperature of dew point, water is generated in
atomizing electrode 135 including its tip, and water drops deposit,
and a fine mist having radicals is generated by application of high
voltage.
[0960] This fine mist passes through atomizing port 132 formed in
outlet wall 137 of electrostatic atomizing device 131, and is
atomized into temperature changing chamber 301, and since the
particle size is very small, the diffusion is very strong, and the
fine mist reaches all parts in temperature changing chamber 301.
Since the fine mist being atomized is generated by high voltage
discharge, and is negatively charged, while temperature changing
chamber 301 contains vegetables and fruit being charged positively,
the atomized mist is likely to gather on the surface of vegetables
and the freshness is enhanced.
[0961] As far as spaying is possible, the temperature is not
specified. For example, if the temperature changing chamber is set
at about -2.degree. C. of partial temperature, about 0.degree. C.
of icing, or about 1.degree. C. of chilling, as far as it is judged
possible to atomize from electrostatic atomizing device 131, by
atomizing, a fine mist deposits on the surface of fresh food, and
the sterilizing effect is enhanced, and the food can be stored for
a long period.
[0962] A more efficient mist atomizing is realizing by interlocking
the operation of fan 322 for refrigerator compartment and the
operation of electrostatic atomizing device 131.
[0963] Near cooling pin 134 of electrostatic atomizing device 131,
a heater may be disposed for the purpose of regulating the
temperature, and the temperature control of the atomizing electrode
and the water volume adjustment at the tip of the department mist
may be enabled, and a further stable mist-making state is
realized.
[0964] Thus, in the preferred embodiment, the refrigerator having a
plurality of evaporator trays, a temperature changing chamber for
varying the temperature, and an evaporation tray for cooling the
temperature changing chamber are provided, and the temperature
changing chamber is cooled by utilizing the evaporation tray for
cooling the refrigerator compartment, and when composed to convey
the cold heat generated herein by the fan for refrigerator chamber,
and the electrostatic atomizing device is provided in a part of the
partition at the inner side of the temperature changing chamber,
and when the temperature setting in the temperature changing
chamber is the temperature setting in the vegetable compartment,
the atomizing electrode can be cooled by heat conduction from the
higher temperature side evaporator, and dew can be condensed, and
stable atomizing is possible, and since it is installed at the
inner side, it is hardly accessed by the user's hand, and the
safety is enhanced, and moreover the number of parts can be saved,
and the structure is more inexpensive.
Preferred Embodiment 31
[0965] FIG. 48 is a sectional view near the vegetable compartment
of the refrigerator in preferred embodiment 31 of the present
invention, illustrating a detailed sectional view near the
electrostatic atomizing device cut alone line A-A in FIG. 2.
[0966] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 30 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
30 or applicable to the same technical concept are omitted in
explanation.
[0967] In the drawing, rear partition 111 is composed of surface of
rear end portion 151 made of ABS or other resin, and heat insulator
152 made of foamed styrol or the like for thermally insulating
between vegetable compartment 107 and outlet air-duct 141 for
freezer compartment.
[0968] Recess 111a is formed in a part of the vegetable compartment
107 side in rear partition 111 so as to be at lower temperature
than in other parts, and cooling pin 509 of heat conduction
material is disposed in this place.
[0969] Cooling pin 509 is cooled mainly by heat conduction from
outlet air-duct 141 for freezer compartment at the back side, and
tip of the department mist 502 is composed of a resin. Channels
504, 505, 506, 507, 508 are formed in cooling pin 501 and tip of
the department mist 502. That is, tip of the department mist 502
provided with channel 504 of a narrow diameter formed at the
atomizing port 132 side, and channel 505 of a wider diameter
communicating with channel 504. Insulator 152 has pump 510 of a
small size disposed in the lower part of cooling pin 501, and
channel 507 is formed having one end thereof being opened to the
vegetable compartment 107 side, and other end being connected to
pump 510. Upward from pump 510, channel 508 is formed to
communicate between heat insulator 152 and cooling pin 501. Cooling
pin 501 also has channel 506 for communicating between the end
portion in cooling pin 501 of channel 508 and channel 505 of tip of
the department mist 502. As a result, a passage is formed from
vegetable compartment 107 by way of channel 507, pump 510, channel
508, channel 506, channel 505, and channel 504 of a narrower
diameter.
[0970] In the upper part of the vegetable compartment 107 side of
cooling pin 501, water collector 503 for collecting water in
vegetable compartment 107 is formed. Water collector 503 is
composed of a metal plate formed on the perpendicular plane in
recess 511 formed in the upper part of the vegetable compartment
107 side of cooling pin 501 of heat insulator 152, and the metal
plate of water collector 503 is thermally connected to cooling pin
509.
[0971] From the upper part surface of the vegetable compartment 107
side of cooling pin 501 exposed through recess 511, waterway 509
communicating with channel 506 is formed in cooling pin 501.
[0972] The cooling compartment 110 side end portion of cooling pin
509 is coupled with partition 161 by way of tape 194 as cool air
shutout member same as in preferred embodiment 10 shown in FIG. 14.
The surrounding of cooling pin 501 is enclosed by heat insulator
152, and the void between recess 111a and cooling pin 501 is filled
up with void burying member (not shown).
[0973] In the refrigerator having such configuration, the operation
and its effects are described. Cooling pin 501 of heat conduction
material is cooled by way of heat insulator 152 of buffer material,
and high humidity air in vegetable compartment 107 condenses dew on
water collector 503 thermally connected to cooling pin 501, and
water 512 is generated. This water 512 is guided into waterway 509,
and flows into channel 505.
[0974] On the other hand, when pump 510 is put in operation, air
from vegetable compartment 107 is sucked in, and flows from channel
505 to channel 504 at a relatively high speed by way of channels
507, 508, 506. In channel 505, as mentioned above, since water 512
is supplied from waterway 509, it is mixed with a fast air flow
from channel 506, and a mist of fluid is atomized from atomizing
port 132 of tip of the department mist 502.
[0975] The generated mist is atomized into vegetable compartment
107, and the contained food is moistened, and the freshness is
enhanced.
[0976] Thus, in the preferred embodiment, cooling pin 501 of heat
conduction material is cooled in outlet air-duct 141 for freezer
compartment, and water is generated in water collector 503. The
generated water is poured into channel 505 formed inside of cooling
pin 501, and air is passed in by the pump from other channels 506,
507, 508, and is mixed with water to generate a mist. By the
generated mist, vegetable compartment 107 can be humidified, and
the freshness of vegetables may be enhanced.
Preferred Embodiment 32
[0977] In the foregoing preferred embodiments, the electrostatic
atomizing device is applied in the refrigerator. However, the
electrostatic atomizing device for atomizing a mist explained in
the foregoing preferred embodiments may be applied not only in the
refrigerator, but also in other apparatuses such as the air
conditioner as the cooling device having a cooling source. Not
limited to the cooling device, it may be similarly applied in other
electric appliances having a large temperature difference between a
space for atomizing a mist, and a space having a cooling pin,
including, for example, dish washer, washing machine, rice cooker,
vacuum cleaner, and other electric appliances.
[0978] This preferred embodiment relates to an example of using an
electrostatic atomizing device in an air conditioner. The air
conditioner is generally composed of an outdoor unit and an indoor
unit mutually connected by a refrigerant piping, and in this
preferred embodiment, the indoor unit of the air conditioner is
mainly explained.
[0979] FIG. 49 is a partially cut-away perspective view showing the
indoor unit of the air conditioner using the electrostatic
atomizing device in preferred embodiment 32 of the present
invention. FIG. 50 is a sectional view configuration of the air
conditioner shown in FIG. 49.
[0980] In this preferred embodiment, only the portions different
from the configuration specifically described in preferred
embodiments 1 to 31 are explained, and the portions similar to the
configuration specifically described in preferred embodiments 1 to
31 or applicable to the same technical concept are omitted in
explanation.
[0981] The indoor unit has sucking ports for sucking the indoor air
into main body 602, that is, front sucking port 602a and top
sucking port 602b, and front sucking port 602a has a front movable
panel to be freely opened and closed (called front panel) 604, and
when the air conditioner is stopped, front panel 604 is contacting
with main body 602 to close front sucking port 602a, but when the
air conditioner is operating, front panel 604 moves in a direction
to depart from main body 602, and front sucking panel 602a is
opened.
[0982] The inside of main body 602 includes pre-filter 605 for
removing dust contained in the air provided at the downstream side
of front sucking port 602a and top sucking port 602b, heat
exchanger 606 for exchanging heat with the indoor air sucked in
from front sucking port 602a and top sucking port 602b provided at
the downstream side of this pre-filter 605, indoor fan 608 for
conveying the air exchanged in heat in heat exchanger 606, vertical
blade 612 for opening and closing blowout port 610 for blowing out
the air sent from indoor fan 608 into the room and changing the air
blowout direction vertically, and lateral blade 614 for changing
the air blowout direction laterally. The upper part of front panel
604 is coupled to the upper part of main body 602 by way of a
plurality of arms (not shown) provided at its both end portions,
and by driving and controlling a drive motor (not shown) coupled to
one of the plurality of arms, during operation of the air
conditioner, front panel 604 moves forward from the position when
the air conditioner is stopped (the closed position of front
sucking port 602a). Vertical blade 612 is similarly coupled to the
lower part of main body 602 by way of a plurality of arms (not
shown) provided at its both end portions.
[0983] A part of heat exchanger 606 is provided with electrostatic
atomizing device 131 having an air purifying function of purifying
the indoor air by generating an electrostatic mist.
[0984] In this way, FIG. 49 shows a removed state of main body
cover (not shown) for covering front panel 604 and main body 602,
and FIG. 50 shows the connection position of indoor unit main body
602 and electrostatic atomizing device 131.
[0985] As shown in FIG. 50, electrostatic atomizing device 131 is
installed at the downstream side of heat exchanged with the suction
air by heat exchanger 606.
[0986] Electrostatic atomizing device 131 is mainly composed of
mist generation department 139, and outlet wall 137 molded by ABS
or other resin. Outlet wall 137 is provided with atomizing port 132
and a humidity supplying port (not shown). Mist generation
department 139 is composed of atomizing electrode 135 as the tip of
the department mist, cooling pin 134 for fixing atomizing electrode
135 nearly in the center of one end portion, and a voltage
applicator (not shown) for applying a voltage to atomizing
electrode 135. Cooling pin 134 is made of an electrode connection
member of heat conduction material such as aluminum, stainless
steel, or brass.
[0987] Cooling pin 134 of heat conduction material is preferably
covered with a heat insulator (not shown) in its surrounding in
order to transmit the cold heat from one end to other end
efficiently by heat conduction.
[0988] From a viewpoint of a long range, it is important to
maintain the heat conduction between atomizing electrode 135 and
cooling pin 134, and to prevent invasion of humidity or the like
into the connection part, an epoxy material or the like is poured
in, and the heat resistance is suppressed, and atomizing electrode
135 and cooling pin 134 are fixed. To lower the heat resistance,
atomizing electrode 135 may be fixed by press-fitting into cooling
pin 134.
[0989] Cooling pin 134 of heat conduction material is fixed in
outlet wall 137, and cooling pin 134 has a protrusion projecting
from the outlet wall. This cooling pin 134 has a protrusion at the
reverse side of atomizing electrode 135, and the protrusion is
fitted or fixed into a part of piping of flow of refrigerant inside
of heat exchanger 606.
[0990] Cooling pin 134 is cooled by utilizing the cooling amount
generated in heat exchanger 606. Since cooling pin 134 is made of a
metal piece of excellent heat conduction, and the cooling section
is capable of cooling by a sufficient capacity necessary for dew
condensation in atomizing electrode 135 only by the heat conduction
from the piping from heat exchanger 606, and the dew condensation
can be formed at the tip of the department mist.
[0991] Since the cooling section can be formed in such a simple
structure, mist making of low trouble rate and high reliability is
realized. Moreover, by utilizing the cooling source of the freezing
cycle, cooling pin 134 of heat conduction material or atomizing
electrode 135 at the tip of the department mist can be cooled, and
mist-making at low energy is realized.
[0992] The voltage applicator is formed near mist generation
department 139, and the negative potential side of the voltage
applicator for generating a high voltage is connected to atomizing
electrode 135, and the positive potential side is connected
electrically to opposite electrode 136, respectively.
[0993] Near atomizing electrode 135, discharge is always occurring
for atomizing the mist, and abrasion may occur at the leading end
of atomizing electrode 135. Like the refrigerator, the air
conditioner is also operated for a long period of more than 10
years. Therefore, the surface of atomizing electrode 135 requires a
tough surface treatment, and, for example, nickel plating, gold
plating, or platinum plating may be preferred.
[0994] Opposite electrode 136 is composed of, for example,
stainless steel, and its long-term reliability is required, and
surface treatment by platinum plating or the like is desired for
the purpose of preventing sticking of foreign matter or preventing
contamination.
[0995] The voltage applicator communicates with and is controlled
by the controller of the air conditioner main body, and turns on or
off the high voltage by the input signal from the air conditioner
main body or electrostatic atomizing device 131.
[0996] In the preferred embodiment having such configuration, the
operation and its effects are explained. In heat exchanger 606,
electrostatic atomizing device 131 is fixed, and cooling pin 134 is
cooled by heat conduction or heat transfer from its cooling source,
and thermally connected atomizing electrode 135 is also cooled, and
water drops are generated on the tip. By applying a high voltage to
the water drops at the leading end of atomizing electrode 135, a
fine mist is generated. The mist generated in electrostatic
atomizing device 131 has an electrical charge, and so as not to be
attracted to heat exchanger 606, after generation of mist, it is
released into the room to be air-conditioned by way of an exclusive
air duct functioning also as a silencer formed of ABS or other
resin.
[0997] The released fine mist flows and diffuses by convection in
the room to be air-conditioned. The diffusing mist deposits on the
clothes and furniture in the room to be air-conditioned. At this
time, by the radicals contained in the mist, the room can be
deodorized and sterilized, and a comfortable space is created in
the room.
[0998] In the case of the air conditioner, in cooling operation,
the air of low temperature passing through heat exchanger 606 of
the indoor unit is high in relative humidity, and atomizing
electrode 135 of electrostatic atomizing device 131 requires a very
small amount of electric power for mist making because dew
condenses on atomizing electrode 135 only when the temperature is
slightly lower than the ambient temperature.
[0999] A heating unit may be installed near electrostatic atomizing
device 131, and the temperature of atomizing electrode 135 can be
regulated, and stable mist-making is possible.
[1000] Without using such heating unit, by stopping the cooling
operation for a while and operating only the fan, the atomizing
electrode can be dried by a dry air in the room to be
air-conditioned, and excessive dew condensation can be prevented,
and the reliability is heightened, and further stable mist-making
is realized.
[1001] Thus, according to the preferred embodiment, by installing
electrostatic atomizing device 131 in heat exchanger 606 of the air
conditioner, the mist can be securely applied on the clothes and
furniture in the room to be air-conditioned. At this time, by the
radicals contained in the mist, the room can be deodorized and
sterilized, and a comfortable space is created in the room.
[1002] In this manner, the electrostatic atomizing device can be
applied in the dish washer, washing machine, rice cooker, vacuum
cleaner, and other electric appliances, and the sterilizing,
bactericidal, and deodorant effects are obtained by mist atomizing
in a simple structure and at low energy.
INDUSTRIAL APPLICABILITY
[1003] The present invention is characterized by supplying fine
mist stably in a simple structure, and is widely applicable in
household and professional refrigerators, vegetable stock, washing
machine, dish washer, and other machines where sterilizing and
deodorizing effects are expected.
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