U.S. patent application number 14/425513 was filed with the patent office on 2015-09-10 for humidity control device.
This patent application is currently assigned to DAIKIN INDUSTRIES, LTD.. The applicant listed for this patent is DAIKIN INDUSTRIES, LTD.. Invention is credited to Akihiro Eguchi, Gakuto Sakai.
Application Number | 20150253018 14/425513 |
Document ID | / |
Family ID | 50237083 |
Filed Date | 2015-09-10 |
United States Patent
Application |
20150253018 |
Kind Code |
A1 |
Eguchi; Akihiro ; et
al. |
September 10, 2015 |
HUMIDITY CONTROL DEVICE
Abstract
An object of the invention is to enhance maintenability of a
humidity control device, and the like. There is provided a humidity
control device that dehumidifies one of outdoor air and indoor air
and humidifies the other in adsorption heat exchangers (31, 32),
and then supplies the outdoor air to an inside of a room, and
exhausts the indoor air to an outside of the room, the device
including casings (11A, 11B), a refrigerant circuit (12) having the
adsorption heat exchangers (31, 32), a compressor (27), a switching
mechanism (26) of a circulation direction of a refrigerant, and
refrigerant pipes (29), fans (34, 35), and an electric component
unit (15), wherein the casings (11) include a first casing (11A) in
which the fans (34, 35), the switching mechanism (26), and the
electric component unit (15) are arranged, and a second casing
(11B) in which the adsorption heat exchangers (31, 32) are
arranged, and the first casing (11A) and the second casing (11B)
are mutually connected through ducts (D5, D6).
Inventors: |
Eguchi; Akihiro; (Sakai-shi,
JP) ; Sakai; Gakuto; (Sakai-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DAIKIN INDUSTRIES, LTD. |
Osaka-shi, Osaka |
|
JP |
|
|
Assignee: |
DAIKIN INDUSTRIES, LTD.
Osaka-shi, Osaka
JP
|
Family ID: |
50237083 |
Appl. No.: |
14/425513 |
Filed: |
August 29, 2013 |
PCT Filed: |
August 29, 2013 |
PCT NO: |
PCT/JP2013/073199 |
371 Date: |
March 3, 2015 |
Current U.S.
Class: |
165/224 ;
62/176.1; 62/271 |
Current CPC
Class: |
F24F 3/147 20130101;
F24F 1/0059 20130101; F24F 11/0008 20130101; F24F 3/1429
20130101 |
International
Class: |
F24F 3/14 20060101
F24F003/14 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 4, 2012 |
JP |
2012-194071 |
Claims
1. A humidity control device that dehumidifies one of outdoor air
and indoor air, and humidifies the other in adsorption heat
exchangers each carrying an adsorbent to adsorb moisture of air,
and then supplies the outdoor air to an inside of a room, and
exhausts the indoor air to an outside of the room, the device
comprising: casings; a refrigerant circuit having the adsorption
heat exchangers, a compressor that circulates a refrigerant, a
switching mechanism that switches a circulation direction of the
refrigerant, and refrigerant pipes that connect the adsorption heat
exchangers, the compressor, and the switching mechanism; fans that
respectively take the outdoor air and the indoor air into one of
the casings; and an electric component unit including control parts
of the humidity control device, wherein the casings include: a
first casing in which the fans, the switching mechanism, and the
electric component unit are arranged; and a second casing in which
the adsorption heat exchangers are arranged, and the first casing
and the second casing are mutually connected through ducts.
2. The humidity control device according to claim 1, wherein the
first casing is provided with a supply air outlet to supply the air
to the inside of the room and an exhaust outlet to exhaust the air
to the outside of the room, and the second casing is provided with
an outside air intake to take in the outside air, and an inside air
intake to take in the indoor air.
3. The humidity control device according to claim 1, wherein the
first casing is provided with an outside air intake to take in the
outside air, and an inside air intake to take in the indoor air,
and the second casing is provided with a supply air outlet to
supply the air to the inside of the room and an exhaust outlet to
exhaust the air to the outside of the room.
4. The humidity control device according to claim 3, wherein air
filters are provided on a suction side of the respective fans
inside the first casing.
5. The humidity control device according to claim 2, wherein the
ducts include a duct for outside air that introduces the outdoor
air to the first casing, and a duct for inside air that introduces
the indoor air to the first casing, the outdoor air being taken
into the second casing from the outside air intake, and the indoor
air being taken into the second casing from the inside air
intake.
6. The humidity control device according to claim 3, wherein the
ducts include a duct for outside air that introduces the outdoor
air to the second casing, and a duct for inside air that introduces
the indoor air to the second casing, the outdoor air being taken
into the first casing from the outside air intake, and the indoor
air being taken into the first casing from the inside air
intake.
7. The humidity control device according to claim 1, wherein the
compressor is connected to the refrigerant pipes drawn from the
first casing.
8. The humidity control device according to claim 1, wherein the
compressor is arranged inside the first casing.
9. The humidity control device according to claim 7, wherein a
plurality of second units are connected to a first unit in
parallel, the plurality of second units each being configured by
the second casing and internal equipment of the second casing, and
the first unit being configured by the first casing, internal
equipment of the first casing, and the compressor.
10. The humidity control device according to claim 8, wherein a
plurality of second units are connected to a first unit in
parallel, the plurality of second units each being configured by
the second casing and internal equipment of the second casing, and
the first unit being configured by the first casing, internal
equipment of the first casing, and the compressor.
Description
TECHNICAL FIELD
[0001] The present invention relates to a humidity control device
that controls indoor humidity.
BACKGROUND ART
[0002] In Patent Literature 1, there is disclosed a humidity
control device that dehumidifies one of outdoor air and indoor air,
and humidifies the other in heat exchangers each carrying an
adsorbent to adsorb moisture of air, and then supplies the outdoor
air to an inside of a room, and exhausts the indoor air to an
outside of the room.
[0003] Specifically, as shown in FIG. 18, inside a casing 111 of
the humidity control device, fans 134, 135 that generate airflow,
and a refrigerant circuit that circulates a refrigerant are
provided. The refrigerant circuit is configured by connecting two
adsorption heat exchangers 131, 132 each carrying an adsorbent, a
compressor 127, an expansion valve, a four way valve and the like
by refrigerant pipes. In one side surface 121 (hereinafter,
referred to as a first side surface) of the casing, an outside air
intake 151 to take in the outdoor air, and an inside air intake 153
to take in the indoor air are formed, and in the vicinity thereof,
an air filter 171 is provided. Moreover, in two other side surfaces
122, 123 (hereinafter, referred to as second and third side
surfaces) adjacent to both sides of the first side surface 121, a
supply air outlet 154 to supply the outdoor air to the inside of
the room, and an exhaust outlet 152 to exhaust the indoor air to
the outside of the room are formed, respectively.
[0004] In the vicinity of another side surface 124 (hereinafter,
referred to as a fourth side surface) opposed to the first side
surface 121 of the casing 111, the two fans 134, 135 are arranged,
and discharge ports of the two fans 134, 135 are connected to the
supply air outlet 154 and the exhaust outlet 152, respectively.
Actuation of these two fans 134, 135 generates flows of air in
which the air taken in from the outside air intake 151 and the
inside air intake 153 is blown out from the supply air outlet 154
and the exhaust outlet 152. Moreover, the compressor 127, the
expansion valve, the four way valve and the like constituting the
refrigerant circuit are arranged between the two fans 134, 135. An
electric component unit (an electric component box) provided with a
control board and the like of the humidity control device is
normally attached to the fourth side surface 124 of the casing 11
in the vicinity of the fans 134, 135 and the compressor 127.
CITATION LIST
Patent Literature
[0005] Patent Literature 1: Japanese Unexamined Patent Publication
No. 2009-109120
SUMMARY OF INVENTION
Technical Problem
[0006] The humidity control device according to Patent Literature 1
is, for example, installed in an indoor roof space, and is
connected to the inside and the outside of the room through ducts.
Accordingly, sound accompanying the actuation of the fans 134, 135
(blowing sound and actuation sound) is easily propagated to the
inside of the room, which causes noise. Moreover, the discharge
ports of the fans 134, 135 are connected to the supply air outlet
154 and the exhaust outlet 152 of the humidity control device, so
that the air blowing from the fans 134, 135 is directly exhausted
outside the casing 111 from the supply air outlet 154 and the
exhaust outlet 152. Accordingly, the sound accompanying the
actuation of the fans 134, 135 (blowing sound and actuation sound)
is easily propagated outside the casing 111, which also causes
noise. Furthermore, sound generated from the compressor 127, the
four way valve and the like near the supply air outlet 154 and the
exhaust outlet 152 is also easily propagated to the inside of the
room.
[0007] Moreover, in the conventional humidity control device, since
the two heat exchangers 131, 132, the four way valve, the
compressor 127 and the like are housed inside one casing 111, it
has a heavy load and a large volume. Thus, handling in conveyance,
keeping, installation and the like is difficult.
[0008] Moreover, the fans 134, 135, the air filter 171, the
electric component unit and the like inside the casing 111 require
maintenance such as inspection, part replacement, cleaning and the
like, and the maintenance of these is performed in the roof space
through an opening formed in a ceiling.
[0009] However, the maintenance in the roof space is very
complicated because of working at a narrow, dark place. Moreover,
since the electric component unit and the fans 134, 135 are
arranged apart from the air filter 171, respective working spaces
need to be assured by being distributed around the casing 111, and
the maintenance cannot be performed at one position. Furthermore,
there is a drawback that limitation on an installation place of the
humidity control device becomes large because the working spaces
are assured by being distributed.
[0010] The present invention is achieved in light of the
above-described situations, and an object of the present invention
is to enhance maintenability of a humidity control device and
reduce noise to an inside of a room, and the like.
Solution to Problem
[0011] The present invention provides a humidity control device
that dehumidifies one of outdoor air and indoor air, and humidifies
the other in adsorption heat exchangers each carrying an adsorbent
to adsorb moisture of air, and then supplies the outdoor air to an
inside of a room, and exhausts the indoor air to an outside of the
room, the device including:
[0012] casings;
[0013] a refrigerant circuit having the adsorption heat exchangers,
a compressor that circulates a refrigerant, a switching mechanism
that switches a circulation direction of the refrigerant, and
refrigerant pipes that connect the adsorption heat exchangers, the
compressor, and the switching mechanism;
[0014] fans that respectively take the outdoor air and the indoor
air into one of the casings; and
[0015] an electric component unit including control parts of the
humidity control device,
[0016] wherein the casings include:
[0017] a first casing in which the fans, the switching mechanism,
and the electric component unit are arranged; and
[0018] a second casing in which the adsorption heat exchangers are
arranged, and
[0019] the first casing and the second casing are mutually
connected through ducts.
[0020] In the humidity control device of the present invention, the
fans and the electric component unit, which are parts having
relatively high maintenance frequency, and the fans and the
switching mechanism, which are parts generating sound, are arranged
in the first casing, and the adsorption heat exchangers, which have
low maintenance frequency, and hardly generate sound, are arranged
in the second casing. Thus, only the second casing is arranged
indoors, and the first casing is arranged outdoors where the
maintenance is easy, which can enhance maintenability to the
equipment inside the first casing, and reduce noise to the inside
of the room. Moreover, the casings are divided into the first
casing and the second casing, which can make a weight and a volume
of each of the casings small, and can make handling in conveyance,
keeping, installation and the like easy.
[0021] The first casing may be provided with a supply air outlet to
supply the air to the inside of the room and an exhaust outlet to
exhaust the air to the outside of the room, and
[0022] the second casing may be provided with an outside air intake
to take in the outside air, and an inside air intake to take in the
indoor air.
[0023] Alternatively, the first casing may be provided with an
outside air intake to take in the outside air, and an inside air
intake to take in the indoor air, and
[0024] the second casing may be provided with a supply air outlet
to supply the air to the inside of the room and an exhaust outlet
to exhaust the air to the outside of the room.
[0025] In the latter case, it is preferable that air filters are
provided on a suction side of the respective fans inside the first
casing.
[0026] In this case, maintenability of the air filters, which have
relatively high maintenance frequency, can be enhanced.
[0027] The ducts can include a duct for outside air that introduces
the outdoor air to the first casing, and a duct for inside air that
introduces the indoor air to the first casing, the outdoor air
being taken into the second casing from the outside air intake, and
the indoor air being taken into the second casing from the inside
air intake.
[0028] Alternatively, the ducts can include a duct for outside air
that introduces the outdoor air to the second casing, and a duct
for inside air that introduces the indoor air to the second casing,
the outdoor air being taken into the first casing from the outside
air intake, and the indoor air being taken into the first casing
from the inside air intake.
[0029] The compressor may be connected to the refrigerant pipes
drawn from the first casing, or may be arranged inside the first
casing.
[0030] In either of the foregoing, the compressor generating sound
can be arranged outdoors together with the first casing.
[0031] In the present invention, it is preferable that a plurality
of second units are connected to a first unit in parallel, the
plurality of second units each being configured by the second
casing and internal equipment of the second casing, and the first
unit being configured by the first casing, internal equipment of
the first casing, and the compressor.
[0032] According to this configuration, the second units are
arranged in a plurality of rooms, and the supply of the refrigerant
to the adsorption heat exchangers in the respective second units
can be performed, using the compressor and the like in the one
first unit.
Advantageous Effects of Invention
[0033] According to the present invention, maintenability of the
equipment and the like inside the casings can be enhanced, and
noise to the inside of the room can be reduced.
BRIEF DESCRIPTION OF DRAWINGS
[0034] FIG. 1 is an explanatory plan view of an inside of a
humidity control device according to a first embodiment of the
present invention.
[0035] FIG. 2 is an explanatory view of the inside of the humidity
control device viewed from an A-A line arrow direction in FIG.
1.
[0036] FIG. 3 is an explanatory view of the inside of the humidity
control device viewed from a B-B line arrow direction in FIG.
1.
[0037] FIGS. 4A and 4B are piping flow diagrams each showing a
refrigerant circuit of the humidity control device.
[0038] FIG. 5 is an explanatory plan view showing a flow of air
inside the humidity control device.
[0039] FIG. 6 is an explanatory plan view showing a flow of the air
inside the humidity control device.
[0040] FIGS. 7A and 7B are explanatory views each showing a flow of
the air between airflow paths and a heat exchange chamber inside
the humidity control device.
[0041] FIGS. 8A and 8B are explanatory views each showing a flow of
the air between the airflow paths and the heat exchange chamber
inside the humidity control device.
[0042] FIG. 9 is a schematic diagram showing an installation
example of the humidity control device.
[0043] FIG. 10 is an explanatory plan view of an inside of a
humidity control device according to a second embodiment of the
present invention.
[0044] FIG. 11 is an explanatory view of the inside of the humidity
control device viewed from an A-A line arrow direction in FIG.
10.
[0045] FIG. 12 is an explanatory view of the inside of the humidity
control device viewed from a B-B line arrow direction in FIG.
10.
[0046] FIG. 13 is an explanatory plan view showing a flow of air
inside the humidity control device.
[0047] FIG. 14 is an explanatory plan view showing a flow of the
air inside the humidity control device.
[0048] FIGS. 15A and 15B are explanatory views each showing a flow
of the air between airflow paths and a heat exchange chamber inside
the humidity control device.
[0049] FIGS. 16A and 16B are explanatory views each showing a flow
of the air between the airflow paths and the heat exchange chamber
inside the humidity control device.
[0050] FIG. 17 is a cross-sectional diagram showing a structure
around a fan in an enlarged manner.
[0051] FIG. 18 is an explanatory plan view showing an inside of a
humidity control device according to a related art.
DESCRIPTION OF EMBODIMENTS
[0052] Hereinafter, embodiments of the present invention will be
described based on the drawings.
First Embodiment
[0053] FIG. 1 is an explanatory plan view of an inside of a
humidity control device according to a first embodiment of the
present invention. FIG. 2 is an explanatory view of the inside of
the humidity control device viewed from an A-A line arrow direction
in FIG. 1. FIG. 3 is an explanatory view of the inside of the
humidity control device viewed from a B-B line arrow direction in
FIG. 1.
[0054] A humidity control device 10 of the present embodiment
performs dehumidification and humidification while performing
indoor ventilation, and includes casings 11A, 11B, a refrigerant
circuit 12, and an airflow control mechanism 13 and the like.
[0055] Casings include the first casing 11A and the second casing
11B. The first casing 11A is arranged, for example, in a roof space
of an outdoor passage or the like, in a machine room or the like,
while the second casing 11B is arranged in an indoor roof space or
the like. The first casing 11A and the second casing 11B are each
formed into a flat rectangular parallelepiped box.
[0056] Specifically, the first casing 11A includes a bottom plate
18a, a top plate 18b, and four side plates (first to fourth side
plates) 21a to 21d. Part of the refrigerant circuit 12, part of the
airflow control mechanism 13, and the like are housed inside a
space surrounded by these bottom plate 18a, top plate 18b, and side
plates 21a to 21d. Moreover, in one side surface (an outer surface
of the first side plate 21a) of the first casing 11A, an electric
component unit 15 is provided.
[0057] In the following description, a direction along short sides
in a planar shape (rectangular shape) of the first casing 11A is a
front-back direction, and a direction along long sides is a
right-left direction. Moreover, as to the front-back direction, a
side of the first side plate 21a is a front side, and a side of the
fourth side plate 21d is a back side. In the first casing 11A, a
length in the right-left direction is longer than a length in the
front-back direction, and the first casing 11A is formed into an
elongated rectangular parallelepiped shape.
[0058] The second casing 11B includes a bottom plate 19a, a top
plate 19b, and four side plates (fifth to eighth side plates) 24a
to 24d. Part of the refrigerant circuit 12, part of the airflow
control mechanism 13, and the like are housed inside a space
surrounded by these bottom plate 19a, top plate 19b, and side
plates 24a to 24d. As for the second casing 11B, the fifth side
plate 24a is arranged in a front portion thereof, the eighth side
plate 24d is arranged in a back portion thereof, and the sixth and
seventh side plates 24b, 24c are arranged in right and left side
portions, respectively.
[0059] The refrigerant circuit 12 housed in the first and second
casings 11A, 11B will be described. FIGS. 4A and 4B are piping flow
diagrams each showing the refrigerant circuit 12 of the humidity
control device 10.
[0060] The refrigerant circuit 12 is configured by connecting a
first heat exchanger 31, a four way valve (switching mechanism) 26,
a compressor 27, a second heat exchanger 32, and an electric
expansion valve (expansion mechanism) 28 by refrigerant pipes 29,
and circulating a refrigerant allows a vapor compression type
refrigerating cycle to be executed.
[0061] A discharge side of the compressor 27 is connected to a
first port of the four way valve 26, and a suction side thereof is
connected to a second port of the four way valve 26. One end of the
first heat exchanger 31 is connected to a third port of the four
way valve 26. The other end of the first heat exchanger 31 is
connected to the electric expansion valve 28. One end of the second
heat exchanger 32 is connected to a fourth port of the four way
valve 26. The other end of the second heat exchanger 32 is
connected to the electric expansion valve 28.
[0062] The compressor 27 is a so-called totally-sealed type
compressor, and is a variable displacement compressor in which an
operation rotation speed (operation frequency) is controlled by an
inverter.
[0063] The first heat exchanger 31 and the second heat exchanger 32
are each configured by a so-called cross fin type, fin and tube
type, heat exchanger including heat transfer tubes and a number of
fins. Moreover, in each outer surface of the first heat exchanger
31 and the second heat exchanger 32, an adsorbent such as zeolite
is carried across almost the entire surface.
[0064] The four way valve 26 is configured so as to be switchable
between a state where the first port and the third port are
communicated with each other and the second port and the fourth
port are communicated with each other (refer to FIG. 4A), and a
state where the first port and the fourth port are communicated
with each other and the second port and the third port are
communicated with each other (refer to FIG. 4B). The refrigerant
circuit 12 inverts a refrigerant circulation direction by switching
the communication state of the ports of this four way valve 26, so
that a first refrigerating cycle operation in which the first heat
exchanger 31 functions as a condenser, and the second heat
exchanger 32 functions as an evaporator, and a second refrigerating
cycle operation in which the first heat exchanger 31 functions as
an evaporator, and the second heat exchanger 32 functions as a
condenser can be performed.
[0065] As shown in FIGS. 1 to 3, in the airflow control mechanism
13, outdoor air and indoor air are taken into the second casing
11B, and after passing through the heat exchangers 31, 32,
respectively, the outdoor air and the indoor air are sent to the
first casing 11A to generate airflow that blows to an inside and an
outside of a room from the first casing 11A. Specifically, the
airflow control mechanism 13 has a first fan 34 and a second fan 35
that blow the air from the casings 11A, 11B.
[0066] The first fan 34 and the second fan 35 are each configured
by a sirocco fan. In the sirocco fan, as shown in FIG. 1, a
multiblade impeller 37 rotated by a motor 36 is provided inside a
fan casing 38. The fan casing 38 is formed into a cylindrical
shape, and suction ports are formed on both side surfaces of the
fan casing 38, and a discharge port 38b is formed in an outer
surface of the fan casing 38. Moreover, the first fan 34 and the
second fan 35 are each configured so that an airflow rate can be
adjusted by inverter control.
[0067] Moreover, the airflow control mechanism 13, as shown in
FIGS. 1 to 3, includes a plurality of dampers 41 to 48 that control
flow paths of the air taken into the casings 11A, 11B by the first
and second fans 34, 35. Specific operation of these dampers 41 to
48 will be described later.
[0068] As shown in FIG. 1, in the second side plate 21b of the
first casing 11A, an exhaust outlet 52 to blow the indoor air from
the first casing 11A is formed. A duct D1 leading to the outside of
the room is connected to this exhaust outlet 52. Inside the first
casing 11A in the vicinity of the exhaust outlet 52, the first fan
34 for exhaust blowing is arranged, and the discharge port 38b of
the first fan 34 is connected to the exhaust outlet 52.
[0069] In the third side plate 21c of the first casing 11A, a
supply air outlet 54 to blow the air inside the first casing 11A to
the inside of the room is formed. A duct D3 leading to the inside
of the room is connected to this supply air outlet 54. Moreover,
inside the first casing 11A in the vicinity of the supply air
outlet 54, the second fan 35 for supply air blowing is arranged,
and the discharge port 38b of this second fan 35 is connected to
the supply air outlet 54.
[0070] In both right and left end portions in the fourth side plate
21d of the first casing 11A, first and second relay intakes 22b,
23b are formed, respectively. One end of a duct for inside air D6,
and one end of a duct for outside air D5 leading to the second
casing 11B are connected to the first and second relay intakes 22b,
23b, respectively. Accordingly, air sent from the duct for inside
air D6 and the duct for outside air D5 is taken into the first
casing 11A through the first and second relay intakes 22b, 23b.
[0071] On a back portion side of the sixth side plate 24b in the
second casing 11B, an outside air intake 51 to take in the outdoor
air into the second casing 11B is formed. A duct D2 leading to the
outside of the room is connected to this outside air intake 51.
Moreover, on the back portion side of the seventh side plate 24c in
the second casing 11B, an inside air intake 53 to take the indoor
air into the second casing 11B is formed. A duct D4 leading to the
inside of the room is connected to this inside air intake 53.
[0072] On a front portion side of the sixth side plate 24b and the
seventh side plate 24c in the second casing 11B, first and second
relay outlets 22a, 23a are formed, respectively. The other end of
the duct for inside air D6 is connected to the first relay outlet
22a, and the other end of the duct for outside air D5 is connected
to the second relay outlet 23a. Accordingly, the outdoor air taken
into the second casing 11B from the outside air intake 51 is taken
into the first casing 11A through the duct for outside air D5, and
the indoor air taken into the second casing 11B from the inside air
intake 53 is taken into the first casing 11A through the duct for
inside air D6.
[0073] With the above-described configuration, the inside and the
outside of the room are communicated with each other through the
ducts D1 to D6 and the first and second casings 11A, 11B.
[0074] As shown in FIG. 1, the air taken into the second casing 11B
from the outside air intake 51 may be expressed by OA, the air
taken into the second casing 11B from the inside air intake 53 may
be expressed by RA, the air exhausted outside the first casing 11A
from the exhaust outlet 52 may be expressed by EA, and the air
exhausted outside the first casing 11A from the supply air outlet
54 may be expressed by SA.
[0075] As shown in FIG. 1, inside the first casing 11A, there are
provided air blowing chambers 56a, 56b in which the first fan 34
and the second fan 35 are arranged. These air blowing chambers 56a,
56b are partitioned by a second partition wall 62 into the first
air blowing chamber 56a in which the first fan 34 for exhaust
blowing is arranged, and the second air blowing chamber 56b in
which the second fan 35 for supply air blowing is arranged. The
second air blowing chamber 56b is formed wider in the right-left
direction than the first air blowing chamber 56a.
[0076] In a space S inside the second air blowing chamber 56b
between the first fan 34 and the second fan 35, the four way valve
26 and the like constituting the refrigerant circuit 12 (refer to
FIGS. 4A and 4B) are arranged. The compressor 27 installed outside
the first casing 11A is connected to refrigerant pipes 29, which
penetrate the first side plate 21a and are drawn out from this
space S. In the present embodiment, the first casing 11A and
internal equipment of the first casing 11A, and the compressor 27
constitute a first unit (function unit) 10A. The compressor 27 may
be arranged in the space S inside the first casing 11A.
[0077] Since the first and second fans 34, 35 are provided inside
the first casing 11A, which is installed outdoors, actuation sound
and blowing sound of the first and second fans 34, 35 can be
prevented from being transmitted to the inside of the room.
Particularly, the second fan 35 is connected to the distant inside
of the room through the duct D3, so that the sound of the second
fan 35 is attenuated through the long duct D3, which can preferably
prevent the sound from being propagated to the inside of the
room.
[0078] The electric component unit 15 arranged on a front surface
of the first side plate 21a of the first casing 11A contains
electric parts such as a control board of the whole humidity
control device 10, a control board (inverter board) of the
compressor 27 and the first and second fans 34, 35, and the like in
an electric component box. In order to conduct inspection, part
replacement and the like of this electric component unit 15, a
working space for maintenance is formed in front of the first
casing 11A. Moreover, detaching the first side plate 21a enables
maintenance of the first and second fans 34, 35, and maintenance of
the four way valve 26 and the like in the refrigerant circuit 12 to
be performed in the working space in front of the first casing
11A.
[0079] Accordingly, in the present embodiment, the electric
component unit 15, the first and second fans 34, 35, and part of
the refrigerant circuit 12 (the four way valve 26 and the like),
which have relatively high maintenance frequency, are
concentratively arranged in the first casing 11A, and the working
space for maintenance of these can be concentratively provided on
the one side of the first casing 11A (in front of the first side
plate 21a). As a result, as compared with a case where the working
spaces are provided so as to be distributed around the casing, a
planar area of the whole working space can be made as small as
possible, and maintenance working can be easily performed at one
position. Moreover, arranging the first casing 11A at an outdoor
place where the maintenance is easily performed can further enhance
maintenability. Moreover, since the first casing 11A can be
downsized as compared with the second casing 11B, it can be
installed, using an outdoor narrow space (a dead space or the
like).
[0080] As shown in FIG. 1, inside the second casing 11B, heat
exchange chambers 57, 58, and airflow paths 59, 60 are formed.
Specifically, a third partition wall 63 and a fourth partition wall
64 extending along the front-back direction are provided side by
side in the right-left direction between the fifth side plate 24a
and the eighth side plate 24d. Front ends of the third partition
wall 63 and the fourth partition wall 64 are connected to the fifth
side plate 24a, and back ends thereof are connected to the eighth
side plate 24d. The heat exchange chambers 57, 58 where the first
and second heat exchangers 31, 32 are arranged are formed between
the third partition wall 63 and the fourth partition wall 64. The
first airflow path 59 and the second airflow path 60 extending in
the front-back direction are formed between the third partition
wall 63 and the sixth side plate 24b, and between the fourth
partition wall 64 and the seventh side plate 24c, respectively. In
each of the first and second airflow paths 59, 60, an air filter 71
is provided.
[0081] The heat exchange chambers 57, 58 are partitioned by a fifth
partition wall 65 in the front-back direction. The first heat
exchanger 31 is arranged in the first heat exchange chamber 57 on a
front side, and the second heat exchanger 32 is arranged in the
second heat exchange chamber 58 on a back side. As shown in FIGS.
7A to 8B, the first heat exchanger 31 and the second heat exchanger
32 are each arranged in a posture inclined so that the side of the
first airflow path 59 is higher than the side of the second airflow
path 60. This allows the airflow inside the first and second heat
exchange chambers 57, 58 to flow through the first and the second
heat exchangers 31, 32 in the right-left direction and in an
upper-lower direction. The first and second heat exchangers 31 may
be arranged so as to be inclined reversely in the right-left
direction to those shown in FIGS. 7A to 8B. Moreover, the first
heat exchanger 31 and the second heat exchanger 32 may be inclined
reversely to each other.
[0082] Arranging the first and second heat exchangers 31, 32 in the
inclined posture in this manner can expand an area of flow-through
of the air, and can enhance heat exchange efficiency and adsorption
efficiency of moisture by the adsorbent. The first and second heat
exchangers 31, 32 are connected to the refrigerant circuit 12
inside the first casing 11A by the refrigerant pipes 29a, as shown
in FIG. 1. The electric expansion valve 28 (refer to FIGS. 4A and
4B) is also arranged between the first and second heat exchangers
31, 32 in the second casing 11B. In the present embodiment, a
second unit (humidity control unit) 10B is configured by the second
casing 11B and the internal equipment of the second casing 11B.
[0083] As shown in FIG. 2, the first airflow path 59 is partitioned
into two upper/lower stages by a sixth partition wall 66. The first
relay outlet 22a formed in the sixth side plate 24b (refer to FIG.
1) is communicated with a first airflow path 59b on the lower stage
side. Moreover, the outside air intake 51 is communicated with a
first airflow path 59a on the upper stage side.
[0084] As shown in FIG. 3, the second airflow path 60 is
partitioned into two upper/lower stages by a seventh partition wall
67. The second relay outlet 23a formed in the seventh side plate
24c (refer to FIG. 1) is communicated with a second airflow path
60a on the upper stage side. Moreover, the inside air intake 53 is
communicated with a second airflow path 60b on the lower stage
side.
[0085] As shown in FIG. 1, the first relay outlet 22a and the
outside air intake 51 are formed in the sixth side plate 24b, and
the second relay outlet 23a and the inside air intake 53 are formed
in the seventh side plate 24c. Accordingly, in the fifth and eighth
side plates 24a, 24d of the second casing 11B, no opening through
which the air flows is formed, and no duct is connected. Thus, no
space for arranging the duct or the like is required around the
fifth and eighth side plates 24a, 24d. Moreover, the maintenance
such as inspection, replacement and the like to the heat exchangers
31, 32 can be performed by detaching one of the fifth side plate
24a and the eighth side plate 24d. Accordingly, while a working
space for maintenance is required on one side of the fifth side
plate 24a and the eighth side plate 24d, the working space need not
be assured on the other side, which enables the second casing 11B
to be arranged so that the other side is arranged at a window of a
building or the like. This reduces limitation on an installation
place of the second casing 11B, thereby increasing a degree of
freedom of the installation.
[0086] FIG. 9 is a schematic diagram showing one example of an
installation aspect of the humidity control device. In this figure,
the plurality of second units (humidity control units) 10B are
connected to the one first unit (function unit) 10A in parallel.
The first unit 10A is arranged in a roof space of an outdoor
passage C, in a machine room or the like. The plurality of second
units 10B are installed in roof spaces of respective rooms R or the
like. The first unit 10A and the second units 10B are connected by
the ducts D5, D6. Since the second units 10B each include parts
having less occurrence of sound such as the heat exchangers 31, 32,
the expansion valve 28 and the like, it hardly causes noise to the
inside of the room. Accordingly, the second units 10B can be each
installed in a place where quietness is required, such as a
sickroom in a hospital, a guest room of a hotel, or the like. In
contrast, while the first unit 10A includes parts that generate
relatively large sound, such as the fans 34, 35, the compressor 27
and the like, it can be arranged outdoors, which hardly poses a
problem of noise to the inside of the room. Moreover, arranging the
first unit 10A outdoors allows the maintenance of the fans 34, 35,
the compressor 27 and the like to be performed outdoors, so that
the inside of the room can be used as usual during the maintenance.
Moreover, configuring the humidity control device by dividing into
the first unit 10A and the second unit 10B can downsize each of the
units, as compared with a case where both are configured
integrally. Thus, the conveyance, keeping, installation and the
like of the first unit 10A and the second units 10B can be easily
performed.
[0087] Next, a configuration of the airflow control mechanism 13
will be described in more detail.
[0088] As shown in FIG. 2, in the third partition wall 63 of the
second casing 11B, four vent holes 81 to 84 are formed side by side
in the front-back direction and in the upper-lower direction. These
vent holes 81 to 84 are configured so as to be openable and
closable by the dampers 41 to 44.
[0089] Moreover, as shown in FIG. 3, in the fourth partition wall
64, four vent holes 85 to 88 are formed side by side in the
front-back direction and in the upper-lower direction. These vent
holes 85 to 88 are configured so as to be openable and closable by
the dampers 45 to 48.
[0090] As shown in FIG. 2, the vent holes 83, 84 on the upper stage
side formed in the third partition wall 63 are communicated with
the first airflow path 59a on the upper stage side. Moreover, the
vent holes 81, 82 on the lower stage side are communicated with the
first airflow path 59b on the lower stage side.
[0091] As shown in FIG. 3, the vent holes 85, 86 on the upper stage
side formed in the fourth partition wall 64 are communicated with
the second airflow path 60a on the upper stage side. Moreover, the
vent holes 87, 88 on the lower stage side are communicated with the
second airflow path 60b on the upper stage side.
[0092] Among the vent holes 81 to 88 formed in the third and fourth
partition walls 63, 64, the four vent holes 81, 83, 85, 87 arranged
on the front side are communicated with the first heat exchange
chamber 57 on the front side (refer to FIG. 1), and the four vent
holes 82, 84, 86, 88 arranged on the back side are communicated
with the second heat exchange chamber 58 on the back side (refer to
FIG. 1).
[0093] Each of the dampers 41 to 48 performs opening and closing
operation in accordance with the following opening and closing
patterns.
[0094] As shown in FIG. 2, among the dampers 41 to 44 provided in
the third partition wall 63, the front and back dampers 43, 44 on
the upper stage side alternately open and close (when one opens,
the other closes, and when the other opens, one closes). Similarly,
the front and back dampers 41, 42 on the lower stage also
alternately open and close. Moreover, the upper and lower dampers
43, 41 on the front side alternately open and close, and the upper
and lower dampers 44, 42 on the back side also alternately open and
close.
[0095] As shown in FIG. 3, among the dampers 45 to 48 provided in
the fourth partition wall 64, the front and back dampers 45, 46 on
the upper stage side alternately open and close, and the front and
back dampers 47, 48 on the lower stage also alternately open and
close. Moreover, the upper and lower dampers 45, 47 on the front
side alternately open and close, and the upper and lower dampers
46, 48 on the back side also alternately open and close.
[0096] Among the dampers 41, 42, 47, 48 on the lower stage side
provided in the third and fourth partition walls 63, 64, the two
dampers 41, 47 arranged on the front side form a pair to
simultaneously open and close (when one opens, the other also
opens, and when one closes, the other also closes), and the two
dampers 42, 48 arranged on the back side form a pair to
simultaneously open and close.
[0097] Similarly, among the dampers 43, 44, 45, 46 on the upper
stage side provided in the third and fourth partition walls 63, 64,
the two dampers 43, 45 arranged on the front side form a pair to
simultaneously open and close, and the two dampers 44, 46 arranged
on the back side form a pair to simultaneously open and close.
[0098] In the present embodiment, combination of the
above-described opening and closing patterns of the dampers 41 to
48 allows the airflow to be switched between an aspect shown in
FIG. 5 and an aspect shown in FIG. 6.
[0099] In the aspect shown in FIG. 5, the indoor air taken in from
the inside air intake 53 by the first fan 34 passes through the
first heat exchange chamber 57, flows into the first casing 11A
through the first relay outlet 22a and the first relay intake 22b,
and is exhausted from the exhaust outlet 52. Moreover, the outdoor
air taken in from the outside air intake 51 by the second fan 35
passes through the second heat exchange chamber 58, flows into the
first casing 11A through the second relay outlet 23a and the second
relay intake 23b, and is exhausted from the supply air outlet
54.
[0100] Moreover, in the aspect shown in FIG. 6, the indoor air
taken in from the inside air intake 53 by the first fan 34 passes
through the second heat exchange chamber 58, flows into the first
casing 11A through the first relay outlet 22a and the first relay
intake 22b, and is exhausted from the exhaust outlet 52. Moreover,
the indoor air taken in from the outside air intake 51 by the
second fan 35 passes through the first heat exchange chamber 57,
flows into the first casing 11A through the second relay outlet 23a
and the second relay intake 23b, and is exhausted from the supply
air outlet 54.
[0101] FIGS. 7A and 7B are explanatory views respectively showing
air flows between the first and second airflow paths 59, 60, and
the first and second heat exchange chambers 57, 58, corresponding
to the aspect of the airflow shown in FIG. 5.
[0102] As shown in FIG. 7A, airflow flowing in the second airflow
path 60b on the lower stage side from the inside air intake 53
flows into the first heat exchange chamber 57 through the vent hole
87 formed on the lower stage front side of the fourth partition
wall 64. Thereafter, the airflow passes through the first heat
exchanger 31, flows into the first airflow path 59b on the lower
stage side through the vent hole 81 formed on the lower stage front
side of the third partition wall 63, and is exhausted from the
first relay outlet 22a.
[0103] At the same time, as shown in FIG. 7B, airflow flowing in
the first airflow path 59a on the upper stage side from the outside
air intake 51 flows into the second heat exchange chamber 58
through the vent hole 84 formed on the upper stage back side of the
third partition wall 63. Thereafter, the airflow passes through the
second heat exchanger 32, flows into the second airflow path 60a on
the upper stage side through the vent hole 86 formed on the upper
stage back side of the fourth partition wall 64, and is exhausted
from the second relay outlet 23a.
[0104] FIGS. 8A and 8B are explanatory views respectively showing
air flows between the first and second airflow paths 59, 60, and
the first and second heat exchange chambers 57, 58, corresponding
to the aspect of the airflow shown in FIG. 6.
[0105] As shown in FIG. 8A, airflow flowing in the second airflow
path 60b on the lower stage side from the inside air intake 53
flows into the second heat exchange chamber 58 through the vent
hole 88 formed on the lower stage back side of the fourth partition
wall 64. Thereafter, the airflow passes through the second heat
exchanger 32, flows into the first airflow path 59b on the lower
stage side through the vent hole 82 formed on the lower stage back
side of the third partition wall 63, and is exhausted to the inside
of the room from the first relay outlet 22a.
[0106] At the same time, as shown in FIG. 8B, airflow flowing in
the first airflow path 59a on the upper stage side from the outside
air intake 51 flows into the first heat exchange chamber 57 through
the vent hole 83 formed on the upper stage front side of the third
partition wall 63. Thereafter, the airflow passes through the first
heat exchanger 31, flows into the second airflow path 60a on the
upper stage side through the vent hole 85 formed on the upper stage
front side of the fourth partition wall 64, and is exhausted to the
outside of the room from the second relay outlet 23a.
[0107] The aspect of the airflow shown in FIG. 5 and FIGS. 7A and
7B, and the aspect of the airflow shown in FIG. 6, and FIGS. 8A and
8B are executed by being alternately repeated every predetermined
time (e.g., every three minutes) in accordance with the switching
operation (first and second refrigerating cycle operations) of the
refrigerant circulation direction shown in FIGS. 4A and 4B. This
enables the humidity control device 10 to perform dehumidification
operation and humidification operation.
[0108] (Description of Dehumidification)
[0109] First, the dehumidification operation will be described. In
the first refrigerating cycle operation, as shown in FIG. 4A, the
refrigerant discharged from the compressor 27 radiates heat and
condenses in the first heat exchanger 31, and is then sent to the
electric expansion valve 28 to be decompressed. The decompressed
refrigerant absorbs heat and evaporates in the second heat
exchanger 32, and is then sucked into the compressor 27 to be
compressed, and is again discharged. Accordingly, in the first
refrigerating cycle operation, the first heat exchanger 31
functions as a condenser, and the second heat exchanger 32
functions as an evaporator.
[0110] At this time, as shown in FIG. 5 and FIGS. 7A and 7B, the
outdoor air OA taken in from the outside air intake 51 passes
through the second heat exchanger 32, and the air SA after the heat
exchange is exhausted from the supply air outlet 54. Moreover, the
indoor air RA taken in from the inside air intake 53 passes through
the first heat exchanger 31, and the air EA after the heat exchange
is exhausted from the exhaust outlet 52. Specifically, in the first
heat exchanger 31 as the condenser, moisture adsorbed by the
adsorbent is desorbed by heat of the refrigerant, and is taken into
the indoor air RA. Thereby, the adsorbent of the first heat
exchanger 31 is reproduced, and the indoor air RA is humidified,
and the air EA after the humidification is exhausted to the outside
of the room from the exhaust outlet 52. Moreover, in the second
heat exchanger 32 as the evaporator, moisture contained in the
outdoor air OA is adsorbed (collected) by the adsorbent by heat
absorption of the refrigerant, so that the outdoor air OA is
dehumidified. The air SA after the dehumidification is supplied to
the inside of the room from the supply air outlet 54.
[0111] In the second refrigerating cycle operation, as shown in
FIG. 4B, the refrigerant discharged from the compressor 27 radiates
heat and condenses in the second heat exchanger 32, and is then
sent to the electric expansion valve 28 to be decompressed. The
decompressed refrigerant absorbs heat and evaporates in the first
heat exchanger 31, and is then sucked into the compressor 27 to be
compressed, and is again discharged. Accordingly, in the second
refrigerating cycle operation, the first heat exchanger 31
functions as an evaporator, and the second heat exchanger 32
functions as a condenser.
[0112] At this time, as shown in FIG. 6 and FIGS. 8A and 8B, the
outdoor air OA taken in from the outside air intake 51 passes
through the first heat exchanger 31, and the air SA after the heat
exchange is exhausted from the supply air outlet 54. The indoor air
RA taken in from the inside air intake 53 passes through the second
heat exchanger 32, and the air EA after the heat exchange is
exhausted from the exhaust outlet 52. Specifically, in the second
heat exchanger 32 as the condenser, moisture adsorbed by the
adsorbent is desorbed by heat of the refrigerant, and is taken into
the indoor air RA. Thereby, the adsorbent of the second heat
exchanger 32 is reproduced, and the indoor air RA is humidified,
and the air EA after the humidification is exhausted to the outside
of the room from the exhaust outlet 52. Moreover, in the first heat
exchanger 31 as the evaporator, moisture contained in the outdoor
air OA is adsorbed (collected) by the adsorbent by heat absorption
of the refrigerant, so that the outdoor air OA is dehumidified. The
air SA after the dehumidification is supplied to the inside of the
room from the supply air outlet 54.
[0113] (Description of Humidification)
[0114] Next, humidification operation will be described. In the
first refrigerating cycle operation shown in FIG. 4A, the first
heat exchanger 31 functions as the condenser, and the second heat
exchanger 32 functions as the evaporator. At this time, as shown in
FIG. 6 and FIGS. 8A and 8B, the outdoor air OA taken in from the
outside air intake 51 passes through the first heat exchanger 31,
and the air SA after the heat exchange is exhausted from the supply
air outlet 54. The indoor air RA taken in from the inside air
intake 53 passes through the second heat exchanger 32, and the air
EA after the heat exchange is exhausted from the exhaust outlet 52.
Specifically, in the first heat exchanger 31 as the condenser,
moisture adsorbed by the adsorbent is desorbed by the heat of the
refrigerant, and is taken into the outdoor air OA. Thereby, the
adsorbent is reproduced, and the outdoor air OA is humidified, and
the air SA after the humidification is supplied to an inside of a
room from the supply air outlet 54. Moreover, in the second heat
exchanger 32 as the evaporator, moisture contained in the indoor
air RA is adsorbed (collected) by the adsorbent by heat absorption
of the refrigerant, so that the indoor air RA is dehumidified. The
air EA after the dehumidification is exhausted to the outside of
the room from the exhaust outlet 52.
[0115] In the second refrigerating cycle operation shown in FIG.
4B, the first heat exchanger 31 functions as the evaporator, and
the second heat exchanger 32 functions as the condenser. At this
time, as shown in FIG. 5 and FIGS. 7A and 7B, the outdoor air OA
taken in from the outside air intake 51 passes through the second
heat exchanger 32, and the air SA after the heat exchange is
exhausted from the supply air outlet 54. The indoor air RA taken in
from the inside air intake 53 passes through the first heat
exchanger 31, and the air EA after the heat exchange is exhausted
from the exhaust outlet 52. Specifically, in the second heat
exchanger 32 as the condenser, moisture adsorbed by the adsorbent
is desorbed by the heat of the refrigerant, and is taken into the
outdoor air OA. Thereby, the adsorbent is reproduced, and the
outdoor air OA is humidified, and the air SA after the
humidification is supplied to the inside of the room from the
supply air outlet 54. Moreover, in the first heat exchanger 31 as
the evaporator, moisture contained in the indoor air RA is adsorbed
(collected) by the adsorbent by heat absorption of the refrigerant,
so that the indoor air RA is dehumidified. The air EA after the
dehumidification is exhausted to the outside of the room from the
exhaust outlet 52.
Second Embodiment
[0116] Next, a second embodiment of the present invention will be
described with reference to FIGS. 10 to 17. The present embodiment
is different from the first embodiment mainly in the configuration
of an airflow control mechanism 13.
[0117] The airflow control mechanism 13 of the present embodiment
is configured to take outdoor air and indoor air into a first
casing 11A as shown in FIGS. 10 to 12, send the outdoor air and the
indoor air to a second casing 11B and pass the same through the
heat exchangers 31, 32, and then generate airflow blowing to an
inside and an outside of a room from the second casing 11B.
Specifically, a first fan 34 and a second fan 35 in the airflow
control mechanism 13 suck the outdoor air and the indoor air into
the first casing 11A.
[0118] The first fan 34 and the second fan 35 are each configured
by a sirocco fan as in the first embodiment. In the sirocco fan, as
shown in FIG. 17, a multiblade impeller 37 rotated by a motor 36 is
provided inside a fan casing 38. The fan casing 38 is formed into a
cylindrical shape, and in both side surfaces of the fan casing 38,
suction ports 38a are formed, and in an outer surface, a discharge
port 38b is formed. Moreover, the first fan 34 and the second fan
35 are each configured so that an airflow rate can be adjusted by
inverter control.
[0119] Moreover, the airflow control mechanism 13, as shown in
FIGS. 10 to 12, includes a plurality of dampers 41 to 48 that
control flow paths of the air taken into the casings 11A, 11B by
the first and second fans 34, 35. In a second side plate 21b of the
first casing 11A, an outside air intake 51 to take indoor air into
the first casing 11A is formed. A duct D1 leading to the outside of
the room is connected to this outside air intake 51. Inside the
first casing 11A in the vicinity of the outside air intake 51, the
first fan 34 for outside air intake is arranged.
[0120] In a third side plate 21c of the first casing 11A, an inside
air intake 53 to take indoor air into the first casing 11A is
formed. A duct D3 leading to the inside of the room is connected to
this inside air intake 53. Moreover, inside the first casing 11A in
the vicinity of the inside air intake 53, the second fan 35 for
inside air intake is arranged.
[0121] In both right and left end portions in a fourth side plate
21d of the first casing 11A, first and second relay outlets 22a,
23a are formed, respectively. The outdoor air taken into the first
casing 11A from the outside air intake 51 is blown out from the
first relay outlet 22a, and the indoor air taken into the first
casing 11A from the inside air intake 53 is blown out from the
second relay outlet 23a. One end of each of a duct for outside air
D5 and a duct for inside air D6 leading to the second casing 11B is
connected to each of the first and second relay outlets 22a,
23a.
[0122] On a back portion side of a sixth side plate 24b in the
second casing 11B, an exhaust outlet 52 to exhaust the air to the
outside of the room from the second casing 11B is formed. A duct D2
leading to the outside of the room is connected to this exhaust
outlet 52. Moreover, on a back portion side of a seventh side plate
24c in the second casing 11B, a supply air outlet 54 to exhaust the
air to the inside of the room from the second casing 11B is formed.
A duct D4 leading to the inside of the room is connected to this
supply air outlet 54.
[0123] On a front portion side of the sixth side plate 24b and the
seventh side plate 24c in the second casing 11B, first and second
relay intakes 22b, 23b are formed, respectively. The other end of
the duct for outside air D5 is connected to the first relay intake
22b, and the other end of the duct for inside air D6 is connected
to the second relay intake 23b. Accordingly, the outdoor air taken
into the first casing 11A is taken into the second casing 11B
through the duct for outside air D5, and the indoor air taken into
the first casing 11A is taken into the second casing 11B through
the duct for inside air D6.
[0124] The above-described configuration allows the inside and the
outside of the room to be communicated with each other through the
ducts D1 to D6, and the first and second casings 11A, 11B.
[0125] As shown in FIG. 10, inside the first casing 11A, as in the
first embodiment, first and second air blowing chambers 56a, 56b
where the first fan 34 and the second fan 35 are arranged are
provided by being partitioned by a second partition wall 62.
[0126] As shown in FIGS. 10 and 17, on a front side of both right
and left end portions of the fourth side plate 21d, there are
provided inclined plates 21d1 each inclined so that a more outer
portion thereof in the right-left direction is located on a more
front side. The discharge ports 38b of the first and second fans
34, 35 are connected to these inclined plates 21d1. Moreover, the
first and second fans 34, 35 are arranged so that a rotating shaft
of each of the impellers 37 is substantially parallel to the
inclined plate 21d1. Accordingly, the first and second fans 34, 35
are arranged in postures inclined to the second side plate 21b and
the third side plate 21c.
[0127] Thus, the suction ports 38a formed in the side surfaces of
the fan casing 38 of the first and second fans 34, 35 are arranged
apart from the second side plate 21b and the third side plate 21c,
and air bringing-in spaces 70 are formed between both, which spaces
are each substantially triangular in planar view. These air
bringing-in spaces 70 each function as a flowing space of the air
before being sucked into the fan casing 38 from the suction ports
38a. Particularly, each of the air bringing-in spaces 70
effectively functions as the flowing space of the air (indicated by
arrow a in FIG. 17) flowing into the suction ports 38a from an
outer circumferential side of the suction ports 38a, and is useful
for smoothly guiding the airflow to the suction ports 38a.
Accordingly, forming the above-described air bringing-in spaces 70
effectively reduces pressure loss of the air sucked into the
suction ports 38a of the first and second fans 34, 35 from the
outside air intake 51 and the inside air intake 53, so that the
outside air and the inside air can be efficiently taken into the
first casing 11A.
[0128] Moreover, since the first and second fans 34, 35 are
arranged in the vicinity of the outside air intake 51 and the
inside air intake 53, actuation sound and blowing sound of the
first and second fans 34, 35 are attenuated while the airflow
passes through the insides of the first and second casings 11A, 11B
and the ducts D5, D6. Accordingly, the sound can be prevented from
being propagated outside the first and second casings 11A, 11B,
thereby causing noise. In addition to the above-described
arrangement of the first and second fans 34, 35, the first casing
11A in which these first and second fans 34, 35 are housed is
arranged outdoors, which can surely prevent the sound of the first
and second fans 34, 35 from being transmitted to the inside of the
room.
[0129] In each of the air bringing-in spaces 70, an air filter 71
is arranged. These air filters 71 are arranged substantially
parallel to the side surfaces of the fans 34, 35. Accordingly, the
air filters 71 are also arranged so as to be inclined to the second
side plate 21b and the third side plate 21c. The above-described
inclined arrangement of the air filters 71 can expand an area of
flow-through of the air. Moreover, part or all of a first side
plate 21a of the first casing 11A is configured detachably, and by
detaching part or all of the first side plate 21a, an
attachment/detachment port for attaching and detaching the air
filters 71 can be formed. As indicated by arrow b in FIG. 10, the
air filters 71 are drawn out obliquely forward, by which the air
filters 71 can be detached from the first casing 11A, so that the
air filters 71 can be cleaned or replaced.
[0130] In the air bringing-in spaces 70, sensors 72, 73 and the
like that measure temperature and humidity of the air taken in from
the outside air intake 51 and the inside air intake 53 are
provided. Electric wiring of these sensors 72, 73 and the like is
drawn from the first and second air blowing chambers 56a, 56b into
an electric component unit 15 provided in the first side plate 21a.
In this manner, the outside air intake 51 and the inside air intake
53 are arranged in the first casing 11A together with the electric
component unit 15, by which the electric wiring of the sensors 72,
73 and the like can be connected to the electric component unit 15
at short distances. Moreover, penetration of the electric wiring
through the partition wall inside the first casing 11A is reduced
as much as possible, so that air leakage between the partitioned
spaces can be prevented from occurring.
[0131] In front of the first casing 11A, as in the first
embodiment, a working space for maintenance to perform inspection,
part replacement and the like of the electric component unit 15 is
formed. However, as described before, since the air filters 71 are
attached and detached in front of the first casing 11A, the
attachment and detachment working of the air filters 71 can be
performed, using the same working space.
[0132] Accordingly, in the present embodiment, the air filters 71
are concentratively arranged in the first casing 11A together with
the electric component unit 15, the first and second fans 34, 35,
and part of the refrigerant circuit 12 (four way valve 26 and the
like), which have relatively high maintenance frequency, and the
working space for maintenance of these can be concentratively
formed on one side of the first casing 11A (in front of the first
side plate 21a).
[0133] Configurations of first and second heat exchange chambers
57, 58 and first and second airflow paths 59, 60, arrangement of
first and second heat exchangers 31, 32, and the like inside the
second casing 11B are similar to those in the first embodiment.
[0134] As shown in FIGS. 11, the first airflow path 59 is
partitioned by a sixth partition wall 66 into two upper/lower
stages. A first relay intake 22b formed in the sixth side plate 24b
(refer to FIG. 10) is communicated with a first airflow path 59b on
a lower stage side. Moreover, the exhaust outlet 52 is communicated
with a first airflow path 59a on an upper stage side.
[0135] As shown in FIG. 12, the second airflow path 60 is
partitioned into two upper/lower stages by a seventh partition wall
67. The second relay intake 23b formed in the seventh side plate
24c (refer to FIG. 10) is communicated with a second airflow path
60a on an upper stage side. Moreover, the supply air outlet 54 is
communicated with a second airflow path 60b on a lower stage
side.
[0136] As described above, since the first relay intake 22b and the
exhaust outlet 52 are formed in the sixth side plate 24b, and the
second relay intake 23b and the supply air outlet 54 are formed in
the seventh side plate 24c, in fifth and eighth side plates 24a,
24d of the second casing 11B, no opening through which the air
flows is formed, and no duct is connected, as in the first
embodiment. Thus, spaces for arranging the ducts and the like are
not required around the fifth and eighth side plates 24a, 24d, and
maintenance of inspection, replacement and the like to the heat
exchangers 31, 32 can be performed by detaching one of the fifth
side plate 24a and the eighth side plate 24d.
[0137] Moreover, in the present embodiment as well, an installation
aspect of the humidity control device can be configured as shown in
FIG. 9. Particularly, in the present embodiment, arranging a first
unit 10A outdoors allows the maintenance of the air filters 71 to
be performed outdoors together with the fans 34, 35, a compressor
27 and the like, and the inside of the room can be used as usual
during the maintenance.
[0138] Next, the configuration of the airflow control mechanism 13
will be described in more detail.
[0139] In the present embodiment as well, a configuration of vent
holes 81 to 88 formed in the second casing 11B, and the dampers 41
to 44 that open and close the vent holes 81 to 88 is similar to
that in the first embodiment.
[0140] Moreover, opening and closing patterns of the respective
dampers 41 to 48 are also similar to those in the first embodiment.
In the present embodiment, combination of the above-described
opening and closing patterns of the dampers 41 to 48 allows the
airflow to be switched between an aspect shown in FIG. 13 and an
aspect shown in FIG. 14.
[0141] In the aspect shown in FIG. 13, the outdoor air taken in
from the outside air intake 51 by the first fan 34 inside the first
casing 11A flows into the second casing 11B through the first relay
outlet 22a and the first relay intake 22b, passes through the first
heat exchange chamber 57, and is exhausted from the supply air
outlet 54. Moreover, the indoor air taken in from the inside air
intake 53 by the second fan 35 inside the first casing 11A flows
into the second casing 11B through the second relay outlet 23a and
the second relay intake 23b, passes through the second heat
exchange chamber 58, and is exhausted from the exhaust outlet
52.
[0142] Moreover, in the aspect shown in FIG. 14, the outdoor air
taken in from the outside air intake 51 by the first fan 34 inside
the first casing 11A flows into the second casing 11B through the
first relay outlet 22a and the first relay intake 22b, passes
through the second heat exchange chamber 58, and is exhausted from
the supply air outlet 54. Moreover, the indoor air taken in from
the inside air intake 53 by the second fan 35 inside the first
casing 11A flows into the second casing 11B through the second
relay outlet 23a and the second relay intake 23b, passes through
the first heat exchange chamber 57, and is exhausted from the
exhaust outlet 52.
[0143] FIGS. 15A and 15B are explanatory views respectively showing
air flows between the first and second airflow paths 59, 60, and
the first and second heat exchange chambers 57, 58, corresponding
to the aspect of the airflow shown in FIG. 13.
[0144] As shown in FIG. 15A, airflow flowing in the first airflow
path 59b on the lower stage side from the first relay intake 22b
flows into the first heat exchange chamber 57 through the vent hole
81 formed on the lower stage front side of a third partition wall
63. Thereafter, the airflow passes through the first heat exchanger
31, flows into the second airflow path 60b on the lower stage side
through the vent hole 87 formed on the lower stage front side of a
fourth partition wall 64, and is exhausted to the inside of the
room from the supply air outlet 54.
[0145] At the same time, as shown in FIG. 15B, airflow flowing in
the second airflow path 60a on the upper stage side from the second
relay intake 23b flows into the second heat exchange chamber 58
through the vent hole 86 formed on the upper stage back side of the
fourth partition wall 64. Thereafter, the airflow passes through
the second heat exchanger 32, flows into the first airflow path 59a
on the upper stage side through the vent hole 84 formed on the
upper stage back side of the third partition wall 63, and is
exhausted to the outside of the room from the exhaust outlet
52.
[0146] FIGS. 16A and 16B are explanatory views respectively showing
air flows between the first and second airflow paths 59, 60, and
the first and second heat exchange chambers 57, 58, corresponding
to the aspect of the airflow shown in FIG. 14.
[0147] As shown in FIG. 16A, airflow flowing in the first airflow
path 59b on the lower stage side from the first relay intake 22b
flows into the second heat exchange chamber 58 through the vent
hole 82 formed on the lower stage back side of the third partition
wall 63. Thereafter, the airflow passes through the second heat
exchanger 32, flows into the second airflow path 60b on the lower
stage side through the vent hole 88 formed on the lower stage back
side of the fourth partition wall 64, and is exhausted to the
inside of the room from the supply air outlet 54.
[0148] At the same time, as shown in FIG. 16B, airflow flowing in
the second airflow path 60a on the upper stage side from the second
relay intake 23b flows into the first heat exchange chamber 57
through the vent hole 85 formed on the upper stage front side of
the fourth partition wall 64. Thereafter, the airflow passes
through the first heat exchanger 31, flows into the first airflow
path 59a on the upper stage side through the vent hole 83 formed on
the upper stage front side of the third partition wall 63, and is
exhausted to the outside of the room from the exhaust outlet
52.
[0149] The aspect of the airflow shown in FIG. 13 and FIGS. 15A and
15B, and the aspect of the airflow shown in FIG. 14 and FIGS. 16A
and 16B are executed by being alternately repeated every
predetermined time (e.g., every three minutes) in accordance with
the switching operation (first and second refrigerating cycle
operations) of the refrigerant circulation direction shown in FIGS.
4A and 4B. This enables the humidity control device 10 to perform
dehumidification operation and humidification operation.
[0150] (Description of Dehumidification)
[0151] Dehumidification operation in the present embodiment will be
described. In the first refrigerating cycle operation shown in FIG.
4A, the refrigerant discharged from the compressor 27 radiates heat
and condenses in the first heat exchanger 31, and is then sent to
an electric expansion valve 28 to be decompressed. The decompressed
refrigerant absorbs heat and evaporates in the second heat
exchanger 32, and is then sucked into the compressor 27 to be
compressed, and is again discharged. Accordingly, in the first
refrigerating cycle operation, the first heat exchanger 31
functions as a condenser, and the second heat exchanger 32
functions as an evaporator.
[0152] At this time, as shown in FIG. 14 and FIGS. 16A and 16B,
outdoor air OA taken in from the outside air intake 51 passes
through the second heat exchanger 32, and air SA after the heat
exchange is exhausted from the supply air outlet 54. Moreover,
indoor air RA taken in from the inside air intake 53 passes through
the first heat exchanger 31, and air EA after the heat exchange is
exhausted from the exhaust outlet 52. Specifically, in the first
heat exchanger 31 as the condenser, moisture adsorbed by the
adsorbent is desorbed by heat of the refrigerant, and is taken into
the indoor air RA. Thereby, the adsorbent of the first heat
exchanger 31 is reproduced, and the indoor air RA is humidified,
and the air EA after the humidification is exhausted to the outside
of the air from the exhaust outlet 52. Moreover, in the second heat
exchanger 32 as the evaporator, moisture contained in the outdoor
air OA is adsorbed (collected) by the adsorbent by heat absorption
of the refrigerant, so that the outdoor air OA is dehumidified. The
air SA after the dehumidification is supplied to the inside of the
room from the supply air outlet 54.
[0153] In the second refrigerating cycle operation shown in FIG.
4B, the refrigerant discharged from the compressor 27 radiates heat
and condenses in the second heat exchanger 32, and is then sent to
the electric expansion valve 28 to be decompressed. The
decompressed refrigerant absorbs heat and evaporates in the first
heat exchanger 31, and is then sucked into the compressor 27 to be
compressed, and is again discharged. Accordingly, in the second
refrigerating cycle operation, the first heat exchanger 31
functions as an evaporator, and the second heat exchanger 32
functions as a condenser.
[0154] At this time, as shown in FIG. 13 and FIGS. 15A and 15B, the
outdoor air OA taken in from the outside air intake 51 passes
through the first heat exchanger 31, and the air SA after the heat
exchange is exhausted from the supply air outlet 54. Moreover, the
indoor air RA taken in from the inside air intake 53 passes through
the second heat exchanger 32, and the air EA after the heat
exchange is exhausted from the exhaust outlet 52. Specifically, in
the second heat exchanger 32 as the condenser, moisture adsorbed by
the adsorbent is desorbed by heat of the refrigerant, and is taken
into the indoor air RA. Thereby, the adsorbent of the second heat
exchanger 32 is reproduced, and the indoor air RA is humidified,
and the air EA after the humidification is exhausted to the outside
of the room from the exhaust outlet 52. Moreover, in the first heat
exchanger 31 as the evaporator, moisture contained in the outdoor
air OA is adsorbed (collected) by the adsorbent by heat absorption
of the refrigerant, so that the outdoor air OA is dehumidified. The
air SA after the dehumidification is supplied to the inside of the
room from the supply air outlet 54.
[0155] (Description of Humidification)
[0156] Next, humidification operation will be described. In the
first refrigerating cycle operation shown in FIG. 4A, the first
heat exchanger 31 functions as the condenser, and the second heat
exchanger 32 functions as the evaporator. At this time, as shown in
FIG. 13 and FIGS. 15A and 15B, the outdoor air OA taken in from the
outside air intake 51 passes through the first heat exchanger 31,
and the air SA after the heat exchange is exhausted from the supply
air outlet 54. The indoor air RA taken in from the inside air
intake 53 passes through the second heat exchanger 32, and the air
EA after the heat exchange is exhausted from the exhaust outlet 52.
Specifically, in the first heat exchanger 31 as the condenser,
moisture adsorbed by the adsorbent is desorbed by the heat of the
refrigerant, and is taken into the outdoor air OA. Thereby, the
adsorbent is reproduced, and the outdoor air OA is humidified, and
the air SA after the humidification is supplied to the inside of
the room from the supply air outlet 54. Moreover, in the second
heat exchanger 32 as the evaporator, moisture contained in the
indoor air RA is adsorbed (collected) by the adsorbent by heat
absorption of the refrigerant, so that the indoor air RA is
dehumidified. The air EA after the dehumidification is exhausted to
the outside of the room from the exhaust outlet 52.
[0157] In the second refrigerating cycle operation shown in FIG.
4B, the first heat exchanger 31 functions as the evaporator, and
the second heat exchanger 32 functions as the condenser. At this
time, as shown in FIG. 14 and FIGS. 16A and 16B, the outdoor air OA
taken in from the outside air intake 51 passes through the second
heat exchanger 32, and the air SA after the heat exchange is
exhausted from the supply air outlet 54. The indoor air RA taken in
from the inside air intake 53 passes through the first heat
exchanger 31, and the air EA after the heat exchange is exhausted
from the exhaust outlet 52. Specifically, in the second heat
exchanger 32 as the condenser, moisture adsorbed by the adsorbent
is desorbed by the heat of the refrigerant, and is taken into the
outdoor air OA. Thereby, the adsorbent is reproduced, and the
outdoor air OA is humidified, and the air SA after the
humidification is supplied to the inside of the room from the
supply air outlet 54. Moreover, in the first heat exchanger 31 as
the evaporator, moisture contained in the indoor air RA is adsorbed
(collected) by the adsorbent by heat absorption of the refrigerant,
so that the indoor air RA is dehumidified. The air EA after the
dehumidification is exhausted to the outside of the room from the
exhaust outlet 52.
[0158] The present invention is not limited to the above-described
embodiments, but modifications can be made within the scope of the
invention described in the claims as needed.
[0159] For example, while in the first embodiment, as shown in FIG.
1, the outside air intake 51 and the inside air intake 53 are
formed in the sixth side plate 24b and the seventh side plate 24c,
respectively, both of them can be formed in the eighth side plate
24d. Moreover, while in the second embodiment, as shown in FIG. 10,
the exhaust outlet 52 and the supply air outlet 54 are formed in
the sixth side plate 24b and the seventh side plate 24c,
respectively, both of them can be formed in the eighth side plate
24d.
[0160] Moreover, in the second embodiment, the first and second
fans 34, 35 may be arranged so that the side surfaces provided with
the suction ports 38a are parallel to the second side plate 21b and
the third side plate 21c. In this case as well, the air bringing-in
spaces 70 are preferably formed between the first and second fans
34, 35, and the second and third side plates 21b, 21c of the first
casing 11A.
[0161] Moreover, the specific aspects of the airflow in the airflow
control mechanism 13 can be modified as needed. For example, while
in the above-described respective embodiments, the configuration is
such that the airflow passing through the heat exchange chambers
57, 58 from the airflow paths 59a, 60a on the upper side flows into
the airflow paths 60a, 59a on the same upper side, and the airflow
passing through the heat exchange chambers 57, 58 from the airflow
paths 59b, 60b on the lower side flows into the airflow paths 60b,
59b on the same lower side, unlike this, the configuration may be
such that the airflow passing through the heat exchange chambers
57, 58 from the airflow paths 59a, 60a on the upper side flows into
the airflow paths 60b, 59b on the lower side, and the airflow
passing through the heat exchange chambers 57, 58 from the airflow
paths 59b, 60b on the lower side flows into the airflow paths 60a,
59a on the upper side.
REFERENCE SIGNS LIST
[0162] 10: HUMIDITY CONTROL DEVICE [0163] 10A: FIRST UNIT (FUNCTION
UNIT) [0164] 10B: SECOND UNIT (HUMIDITY CONTROL UNIT) [0165] 11A:
FIRST CASING [0166] 11B: SECOND CASING [0167] 12: REFRIGERANT
CIRCUIT [0168] 26: FOUR WAY VALVE (SWITCHING MECHANISM) [0169] 27:
COMPRESSOR [0170] 29: REFRIGERANT PIPE [0171] 31: FIRST HEAT
EXCHANGER (ADSORPTION HEAT EXCHANGER) [0172] 32: SECOND HEAT
EXCHANGER (ADSORPTION HEAT EXCHANGER) [0173] 34: FIRST FAN [0174]
35: SECOND FAN [0175] 51: OUTSIDE AIR INTAKE [0176] 52: EXHAUST
OUTLET [0177] 53: INSIDE AIR INTAKE [0178] 54: SUPPLY AIR OUTLET
[0179] 71: AIR FILTER [0180] D5: DUCT FOR OUTSIDE AIR [0181] D6:
DUCT FOR INSIDE AIR
* * * * *