U.S. patent number 3,667,249 [Application Number 05/074,750] was granted by the patent office on 1972-06-06 for refrigerator with ice maker and high humidity compartment.
This patent grant is currently assigned to General Motors Corporation. Invention is credited to Richard C. Brown, Orson V. Saunders.
United States Patent |
3,667,249 |
Brown , et al. |
June 6, 1972 |
**Please see images for:
( Certificate of Correction ) ** |
REFRIGERATOR WITH ICE MAKER AND HIGH HUMIDITY COMPARTMENT
Abstract
A refrigerator has a high humidity compartment the bottom of
which is formed by a pan carrying a film of ice water supplied by
the melting of ice cubes in the storage bin of an ice maker. The
storage bin has a perforated bottom which drains onto the pan.
Refrigerated air in large quantities is used to maintain a below
freezing temperature in the freezing compartment and in smaller
quantities to maintain the low humidity compartment at above
freezing temperatures. The high humidity compartment is cooled
through its walls to keep its temperature slightly above
freezing.
Inventors: |
Brown; Richard C. (Dayton,
OH), Saunders; Orson V. (Dayton, OH) |
Assignee: |
General Motors Corporation
(Detroit, MI)
|
Family
ID: |
22121478 |
Appl.
No.: |
05/074,750 |
Filed: |
September 23, 1970 |
Current U.S.
Class: |
62/312; 62/91;
62/344 |
Current CPC
Class: |
F25D
17/065 (20130101); F25C 5/185 (20130101); F25D
2400/04 (20130101); F25C 2400/10 (20130101); F25C
2500/08 (20130101); F25D 2317/0413 (20130101); F25D
2317/061 (20130101); F25D 2317/0653 (20130101); F25D
2321/1412 (20130101) |
Current International
Class: |
F25D
17/06 (20060101); F25C 5/18 (20060101); F25C
5/00 (20060101); F25c 005/18 () |
Field of
Search: |
;62/78,91,340,422,423,460 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wayner; William E.
Claims
We claim:
1. A refrigerator including a cabinet having insulated outer walls,
partitions within said cabinet dividing said cabinet into a below
freezing compartment and an above freezing high humidity
compartment, an icemaker within the cabinet including an ice
freezing portion and an ice storing portion, wherein the
improvement comprises means for cooling said below freezing
compartment and said ice freezing portion to below water freezing
temperatures and said ice storing portion and said high humidity
compartment to slightly above water freezing temperatures, and
means for draining ice water from said ice storing portion and
conducting said ice water to said high humidity compartment, said
last named means including means for distributing and retaining
said ice water in exposed fashion throughout a substantial area of
said high humidity compartment, the partition separating said
compartments together with the exposed ice water in said high
humidity compartment providing sufficient heat transfer to keep
said high humidity compartment cooled to slightly above water
freezing temperatures.
2. A refrigerator including a cabinet having insulated outer walls,
partitions within said cabinet dividing said cabinet into a below
freezing compartment and an above freezing high humidity
compartment, refrigerant evaporating means normally maintained at
below freezing temperatures, an icemaker within the cabinet
including an ice freezing portion and an ice storing portion,
wherein the improvement comprises means for circulating air in
sufficient quantity from said below freezing compartment into heat
transfer with said evaporating means and thence to said below
freezing compartment and into heat transfer with said ice freezing
portion and said ice storing portion to keep said below freezing
compartment and said ice freezing portion substantially below water
freezing temperatures and to keep said ice storing portion at
slightly above water freezing temperatures, and means for draining
ice water from said ice storing portion and conducting said ice
water to said high humidity compartment, said last named means
including means for distributing and retaining said ice water in
exposes fashion throughout a substantial area of said high humidity
compartment, the partition separating said compartments together
with the exposed ice water in said high humidity compartment
providing sufficient heat transfer to keep said high humidity
compartment cooled to slightly above water freezing
temperatures.
3. A refrigerator including a cabinet having insulated outer walls,
partitions within said outer walls dividing said cabinet into a
below freezing compartment and an above freezing high humidity
compartment and an above freezing low humidity compartment,
refrigerant evaporating means normally maintained at below freezing
temperatures, an icemaker within the cabinet including an ice
freezing portion and an ice storing portion, wherein the
improvement comprises means for circulating air in sufficient
quantity from said below freezing compartment and said low humidity
compartment into heat transfer with said evaporating means and
thence to said below freezing compartment and said low humidity
compartment and into heat transfer with said ice freezing portion
and said ice storing portion to keep said below freezing
compartment and said ice freezing portion substantially below water
freezing temperatures and to keep said low humidity compartment and
said ice storage portion at slightly above water freezing
temperatures, one of said partitions including means for draining
ice water from said ice storing portion and conducting said ice
water to said high humidity compartment, said last named means
including means for distributing said ice water in exposed fashion
throughout a substantial area of said high humidity compartment,
the partitions separating said high humidity compartment from said
below freezing compartment and said low humidity compartment
together with the exposed ice water in said high humidity
compartment having sufficient heat conducting capacity to keep said
high humidity compartment slightly above water freezing
temperatures, said one of said partitions at least partially
defining an air passage portion of said means for circulating air
to convey air from said above freezing low humidity compartment
into heat transfer relationship with said means for distributing
ice water.
4. A refrigerator including a cabinet having insulated outer walls,
partitions within said outer walls dividing said cabinet into a
below freezing compartment and an above freezing high humidity
compartment and an above freezing low humidity compartment,
refrigerant evaporating means normally maintained at below freezing
temperatures, an icemaker within the cabinet including an ice
freezing portion and an ice storing portion, wherein the
improvement comprises means for circulating air in sufficient
quantity from said below freezing compartment and said low humidity
compartment into heat transfer with said evaporating means and
thence to said below freezing compartment and said low humidity
compartment and into heat transfer with said ice freezing portion
and said ice storing portion to keep said below freezing
compartment and said ice freezing portion substantially below water
freezing temperatures and to keep said low humidity compartment and
said ice storage portion at slightly above water freezing
temperatures, one of said partitions including means for draining
ice water from said ice storing portion and conducting said ice
water to said high humidity compartment, said last named means
including means for distributing said ice water in exposed fashion
throughout a substantial area of said high humidity compartment,
the partitions separating said high humidity compartment from said
below freezing compartment and said low humidity compartment
together with the exposed ice water in said high humidity
compartment having sufficient heat conduction capacity to keep said
high humidity compartment slightly above water freezing
temperatures, said means for distributing said ice water comprising
the bottom of said high humidity compartment and being defined by
an open-top pan for receiving said ice water from said ice storing
portion.
5. A refrigerator including a cabinet having insulated outer walls,
partitions within said outer walls dividing said cabinet into a
below freezing compartment and an above freezing high humidity
compartment and an above freezing low humidity compartment,
refrigerant evaporating means normally maintained at below freezing
temperatures, an icemaker within the cabinet including an ice
freezing portion and an ice storing portion, wherein the
improvement comprises means for circulating air in sufficient
quantity from said below freezing compartment and said low humidity
compartment into heat transfer with said evaporating means and
thence to said below freezing compartment and said low humidity
compartment and into heat transfer with said ice freezing portion
and said ice storing portion to keep said below freezing
compartment and said ice freezing portion substantially below water
freezing temperatures and to keep said low humidity compartment and
said ice storage portion at slightly above water freezing
temperatures, means for draining ice water from said ice storing
portion and conducting said ice water to said high humidity
compartment, the partitions separating said high humidity
compartment from said below freezing compartment having insulating
properties, the partition separating said high humidity compartment
from said low humidity compartment being of good heat conducting
material in heat transfer relationship with air circulating from
said low humidity compartment.
Description
A refrigerator in a modern home is expected to provide an extensive
variety of refrigerating services such as storage at 0.degree. to
10.degree. F., low humidity storage at 34.degree. to 38.degree. F.,
and automatic ice making and ice storing. One of the problems of
ice storage is the acquisition of taste upon the surface of the ice
by prolonged exposure to the air in the refrigerator. Another
problem is the drying of uncovered or unprotected food in the above
freezing storage compartment.
It is an object of this invention to provide in a refrigerator a
single forced air cooling system which will minimize the
undesirable taste and sticking of ice cubes in storage and which by
the accomplishment of the foregoing will provide in an additional
compartment a high humidity ambient to minimize evaporation from
foods therein.
It is another object of this invention to provide a refrigerator
having an ice maker and above and below freezing compartments with
an arrangement for allowing the slow melting of ice in the ice
storage bin to minimize the sticking of ice therein and to use the
drainage from the bin for humidifying an additional compartment
maintained between 34.degree. and 38.degree. F.
Further objects and advantages will become more apparent from the
following specification, reference being had to the accompanying
drawings of which:
FIG. 1 is a front view of a refrigerator with the door omitted
showing one form of my invention;
FIG. 2 is a side sectional view of the refrigerator shown in FIG. 1
taken along the line 2--2 thereof; and
FIG. 3 is a fragmentary section taken along line 3--3 in FIG. 1 and
including the door.
Referring now to the drawings, there is shown in FIGS. 1 and 2 an
insulated refrigerator cabinet including an insulated top outer
wall 20 and an insulated bottom wall 22, insulated side walls 24
and 26, and an insulated rear wall 28. Extending horizontally
across the mid portion of the cabinet is a shallow generally flat
pan 30 having a low up-turned rim 32 extending around its periphery
which extends substantially to the side wall 26 and the rear wall
28. This pan 30 may be made of suitable metal or plastic having
relatively good heat conduction properties. On the left side above
the pan 30 there is provided a short vertical insulated wall 34
extending upwardly to a horizontal insulated wall 36 which extends
to the side wall 26. The walls 34 and 36 extend substantially to
the rear wall 28 and the wall 36 extends from the wall 34 to the
side wall 26. This provides a small above freezing high humidity
compartment 38 which is bounded by the walls 34, 36, 26, 28 and the
pan 30. Another above freezing compartment 40 is provided below the
pan 30 between the side walls 24 and 26 and the rear wall 28 and
the bottom wall 22. A below freezing compartment 42 is provided
between the insulated walls 34 and 36, the side walls 24 and 26,
and the top wall 20.
In the compartment 42 between the vertical wall 34 and the side
wall 24 above the pan 30 there is Kniffin an automatic ice maker 44
including a control and power portion 46 and an invertible ice tray
freezing portion 48 which is operated by the power portion 46 and
an ice storage container portion 50 located beneath the ice tray
portion 48 which has a bottom 51 provided with drainage holes to
permit the draining of ice water which is melted from the ice
therein. This water carries away most of the taste from the surface
of the ice. The ice maker may be of any suitable type. One example
of a suitable ice maker is illustrated in the Kniffing U.S. Pat.
No. 3,308,631 issued Mar. 14, 1967. As illustrated in said patent,
the ice maker may be provided with a suitable automatically
controlled water supply and automatic control for the freezing of
the ice in the ice maker freezing tray 48 and for the disengagement
and release of the ice from the tray 48 and the dumping of the tray
full of ice into the bin 50.
Between the rear of the bin 50 and the rear wall 28 there is
provided a centrifugal fan housing 52 having in its front wall an
inlet opening 53. Within the housing 52 is a centrifugal fan rotor
54 driven by an electric motor 56 which protrudes from the rear
wall 28. The fan has an upwardly discharging outlet in the housing
52. Above the housing 52 is a vertically finned refrigerant
evaporator 58 which receives the air from the outlet of the housing
52. The evaporator 58 is enclosed by a shield 60 upon the front and
right side thereof. The left side of the evaporator is located
adjacent the side wall 24. The shield 60 at the top is provided
with a side outlet 62 and a front outlet 64 through which is
delivered the air cooled by the evaporator.
The top of the compartment 40 is provided with a horizontal baffle
68. Above this baffle 68 there extends a vertical tube 66 extending
to the front opening of the housing 52 of the centrifugal fan. Air
from the compartment 40 flows around the edges of the baffle 68 and
thence between this baffle and the bottom of the pan 30 to the tube
66, thereby absorbing any moisture collecting on the bottom of the
pan. This tube has a front portion which extends up along the rear
wall of the bin 50 so as to restrict the circulation of freezing
air around the bin 50. Some air from the compartment 40 may also
flow between the refrigeration door 41 and an offset front edge
portion 33 of the pan 30 and around the bin 50 (FIG. 3) to the
inlet opening 53 of the housing 52 to keep the bin slightly above
water freezing temperatures such as 33.degree. F. A greater volume
of air is drawn from the compartment 42 around the ice tray 48 and
into the opening of the housing 52 to freeze the water in the ice
tray. Along the side wall 24 there is provided a series of
horizontal bars 70 of heavy wire which provide a path for air flow
to a downwardly extending tube 72 extending down beneath the baffle
68 to a horizontally extending deflector or tube 74 which
discharges cool air into the top of the compartment 40 in
sufficient quantities to keep the compartment 40 slightly above
water freezing temperature such as 34.degree. to 38.degree. F.
Suitable baffling or duct sizing may be used to achieve the desired
division of air flow. Horizontal wire bars 75 are also provided
over the ice making tray 48 to prevent packages from resting on the
ice tray and to allow freezing air flow over the ice tray 48.
REfrigerant which evaporates in the evaporator 58 is drawn through
the suction line 76 to the sealed motor compressor unit 78 which
compresses and discharges the compressed refrigerant to a condenser
80. The condensed refrigerant is forwarded to a restrictor supply
conduit 82 to the inlet of the evaporator 58. The refrigerating
system preferably is provided with a suitable control system, not
shown, for maintaining the evaporator 58 at temperatures of about
-10.degree. to -15.degree. F. The duct 72 and the wall 34 may be
provided with slide rails 84 and 86 cooperating with a bin support
flange 87 to restrict the flow of cold air from the compartment 42
around the bin 50 so that the bin has a greater portion of air from
the compartment 40 flowing around it so as to keep the temperature
of the bin just slightly above water freezing temperature. The slow
melting of the surface of the ice prevents the sticking of the ice
cubes and also removes taste or odor or other contaminates on the
surface of the ice cubes or pieces of ice and allows drainage
through holes in the bottom 51 of the bin onto the pan 30.
A space is provided beneath the wall 34 and between it and the pan
30 as to allow the ice water to flow beneath the wall 34 on the pan
30 into the high humidity compartment 38. Here the pan exposes
substantially the entire bottom of the compartment 38 to the melted
ice water so as to maintain a high humidity area therein. The
compartment 38 may be provided with one or more wire shelves 88
above the pan 30 to support food stuff thereon. The compartment 38
is cooled by heat transfer with the ice making system. More
particularly, heat transfers through the insulated walls 34 and 36.
In addition to humidifying compartment 38, a small amount of
cooling is also provided by the ice water in pan 30 which is
supplied by the melting of the ice in the ice storage bin 50. The
pan 30 forms a divider to effectively seal compartment 38 from the
rest of the refrigerator. For instance, compartment 38 may be
sealed by a separate door at the front thereof or by a seal 77 on
the outside refrigerator door 41 at the level of the pan 30. The
bottom of partition 34 cooperates with the melted ice water in pan
30 by submergence therein to seal compartment 38 from the ice maker
44.
The low humidity compartment 40 is adequately cooled to
temperatures between 34.degree. to 38.degree..degree. F. by the
circulation of cool air from the discharge tube 74 through the
compartment around the baffle 68 into the inlet tube 66. The below
freezing compartment 42 is adequately cooled to temperatures of
0.degree. to 10.degree. F. by air circulation from the outlets 62
and 64 through the compartment around the freezing tray 48 into the
inlet 53 of the fan housing 52. This circulation also keeps the ice
trays 48 well below water freezing temperatures such as 10.degree.
F. The heat transfer through the walls or partitions surrounding
the compartment 38 together with the melted ice water in pan 30
keeps this compartment at temperatures between about 34.degree. and
38.degree. F.
The pan 30 is provided at the rear with an overflow drain 90 which
flows down into a shallow pan 92 located above the sealed motor
compressor unit 78 and the condenser 80. The heat given off by the
sealed motor compressor unit 78 and condenser 80 evaporates any of
the overflow in the pan so it can prevent an excessive amount of
water accumulating in the pan 92. The variety of refrigeration
services afforded by this invention includes a high humidity
storage compartment and taste-free ice. The action of the melting
ice provides the ice water used to both humidify and partially cool
compartment 38. Moreover, melting the surface of ice stored in bin
50 flushes away food odors absorbed by the ice and maintains the
ice at approximately 132.degree. F. so that ice cubes or pieces
will hot stick together.
* * * * *