TECHNICAL FIELD
[0001] The present invention relates to an air-conditioning outdoor unit comprising a humidifying
unit.
BACKGROUND ART
[0002] In conventional practice, there have been air-conditioning outdoor units in which
above an outdoor unit housing a compressor, an outdoor heat exchanger, an outdoor
fan, and other components, a humidifying unit separate from the outdoor unit is installed
for humidifying the room interior. In this type of air-conditioning outdoor unit,
the height dimension of the air-conditioning outdoor unit is increased by installing
the humidifying unit above the outdoor unit, therefore causing a problem in that the
product size of the air-conditioning outdoor unit increases.
[0003] One example of a countermeasure to this problem is, e.g., with the air-conditioning
outdoor unit disclosed in Patent Literature 1, Japanese Laid-open Patent Application
No.
2012-251692, an air-conditioning outdoor unit is achieved in which a humidifying function is
provided and the product size is reduced by moving the components of the humidifying
unit to the upper part of the outdoor unit to house these components within the outdoor
unit and minimize the height dimension of the air-conditioning outdoor unit.
Further, in Patent Literatur 2
JP 2010 261 711 A, there is described an air conditioner. The air conditioner includes an outdoor unit
casing, an outdoor air conditioning unit, an indoor unit, a humidifying unit, and
humidification air piping. The outdoor air conditioning unit includes an outdoor heat
exchanger and an outdoor fan. In the indoor unit includes an indoor heat exchanger
housed in an outdoor unit casing. The humidifying unit includes a humidification rotor
sucking in outdoor air, a rotor driving motor rotativly driving the humidification
rotor, a heater assembly heating one part of th e humidification rotor, and a humidification
fan mixing moisture separated from the the humidification rotor with the outdoor unit
and conveying it to an indoor unit casing sight. Humidified air produces by the humidifying
unit is supplied from the humidifying unit to an indoor air conditioning unit sight
by the humidification air piping.
SUMMARY OF THE INVENTION
<Technical Problem>
[0004] The interior of the air-conditioning outdoor unit is commonly divided into a machinery
chamber in which the compressor and other components are disposed, and an air-blower
chamber in which the outdoor heat exchanger, the outdoor fan, and other components
are disposed. In the air-conditioning outdoor unit disclosed in Patent Literature
1, a rotor, which is one component of the humidifying unit and which adsorbs moisture
from outdoor air and releases the adsorbed moisture, is disposed along a horizontal
plane. Furthermore, the entire rotor is positioned in the air-blower chamber and disposed
in front of the outdoor heat exchanger. When the rotor is disposed in this manner,
part of the outdoor heat exchanger is sometimes closed off by the humidifying unit.
Because outdoor air then does not readily pass through the section in the outdoor
heat exchanger that is closed off by the humidifying unit, there is a risk that the
performance of the outdoor heat exchanger will decrease.
[0005] An object of the present invention is to provide an air-conditioning outdoor unit
in which the decrease in the performance of the outdoor heat exchanger can be prevented.
<Solution to Problem>
[0006] An air-conditioning outdoor unit according to a first aspect of the present invention
according to claim 1 comprises a casing, a compressor, an outdoor heat exchanger,
an outdoor fan, and a humidifying unit. The interior of the casing is divided into
an air-blower chamber and a machinery chamber aligned laterally. The compressor is
disposed in the machinery chamber. The outdoor heat exchanger is disposed in the air-blower
chamber. The outdoor fan is disposed in the air-blower chamber. The outdoor fan passes
outdoor air through the outdoor heat exchanger. The humidifying unit has a tabular
rotor. The tabular rotor includes a moisture-adsorption area and a moisture-releasing
area. The moisture-adsorption area adsorbs moisture in the outdoor air. The moisture-releasing
area releases the moisture adsorbed in the moisture-adsorption area when heat is applied.
The tabular rotor is set up in front of the outdoor heat exchanger along a vertical
plane. The tabular rotor is disposed so that the moisture-adsorption area is positioned
in the air-blower chamber and the moisture-releasing area is positioned in the machinery
chamber. The entirety of a rotor-driving motor for rotatably driving the tabular rotor
is disposed in the machinery chamber. Also, the tabular rotor is disposed so that
an upper end thereof is in a position either near an upper end of the outdoor heat
exchanger or lower than the upper end of the outdoor heat exchanger.
[0007] In the air-conditioning outdoor unit according to the first aspect of the present
invention, the tabular rotor is set up along a vertical plane, the moisture-adsorption
area is positioned in the air-blower chamber, and the moisture-releasing area is positioned
in the machinery chamber. Therefore, in comparison with the rotor being disposed along
a horizontal plane, the distance between the outdoor heat exchanger and the rotor
can be increased, and the decrease in performance of the outdoor heat exchanger that
would follow with outdoor air not readily flowing to the outdoor heat exchanger can
be prevented.
[0008] In cases such as when the rotor-driving motor for rotatably driving the tabular rotor
is spread between both the air-blower chamber and the machinery chamber, the section
of the rotor-driving motor that is positioned in the air-blower chamber is exposed
to the outdoor air flow generated by the driving of the outdoor fan, and the section
that is positioned in the machinery chamber is exposed to waste heat generated by
the driving of the compressor and other components. The section of the rotor-driving
motor that is positioned in the air-blower chamber is then cooled while the section
positioned in the compressor chamber is heated, abnormalities therefore readily occur
in the rotor-driving motor, and as a result, it is difficult to ensure durability
in the rotor-driving motor.
[0009] In the present invention, the entirety of the rotor-driving motor is disposed in
the machinery chamber. Therefore, abnormalities in the rotor-driving motor caused
by part of the tabular rotor being cooled by the driving of the air-blowing fan can
be prevented. It is thereby possible to ensure durability in the rotor-driving motor.
[0010] The phrase "the rotor is set up along a vertical plane" used here includes any interpretation
from the tabular rotor not being inclined whatsoever relative to a vertical plane,
to the tabular rotor being disposed at an incline of about ±15° relative to a vertical
plane.
[0011] An air-conditioning outdoor unit according to a second aspect of the present invention
is the air-conditioning outdoor unit according to the first aspect, comprising an
electrical component box. The electrical component box houses an electrical component
for controlling devices including the compressor and the outdoor fan. The electrical
component box is disposed so as to at least partially overlap the tabular rotor in
a front view of the air-conditioning outdoor unit. In the air-conditioning outdoor
unit, at least part of the electrical component box is disposed so as to overlap the
tabular rotor in a front view. Therefore, the dimension of the casing in the lateral
direction can be made smaller than if, e.g., the tabular rotor and the electrical
component box were to be aligned laterally so as not to overlap in a front view.
[0012] The air-conditioning outdoor unit can thereby be made smaller.
[0013] An air-conditioning outdoor unit according to a third aspect of the present invention
is the air-conditioning outdoor unit of the second aspect, wherein the electrical
component box is set up along a vertical plane. The electrical component box and the
tabular rotor are disposed so as to be aligned forward to backward. In this air-conditioning
outdoor unit, because the rotor and the electrical component box are both set up along
a vertical plane and the electrical component box and the tabular rotor are disposed
so as to be aligned forward to backward, the width dimension of the casing in the
forward-backward direction can be made smaller than if, e.g., the electrical component
box was to be set up so that the longitudinal direction thereof extends along a horizontal
plane.
[0014] The air-conditioning outdoor unit can thereby be made thinner.
[0015] The phrase "the electrical component box is set up along a vertical plane" used here
includes any interpretation from the electrical component box not being inclined whatsoever
relative to a vertical plane, to the electrical component box being disposed at an
incline of about ±15° relative to a vertical plane.
[0016] An air-conditioning outdoor unit according to a fourth aspect of the present invention
is the air-conditioning outdoor unit of the second or third aspect, wherein the machinery
chamber is formed so that the lateral width of the machinery chamber increases toward
the front. The electrical component box is disposed in the front of the machinery
chamber interior. In this air-conditioning outdoor unit, because the electrical component
box is disposed in the front of the machinery chamber interior in which the lateral
directional width is greater than in the rear of the machinery chamber interior, the
lateral directional dimension of the electrical component box can be greater than
if the electrical component box were to be disposed in the rear of the machinery chamber
interior.
[0017] The degree of freedom in the design of the electrical component box can thereby be
improved.
[0018] An air-conditioning outdoor unit according to a fifth aspect of the present invention
is the air-conditioning outdoor unit of any of the first through fourth aspects, wherein
the humidifying unit has a heater. The heater is for heating the moisture-releasing
area. The heater is disposed in the machinery chamber. In this air-conditioning outdoor
unit, because the heater and the rotor-driving motor are disposed in the machinery
chamber, the work of routing wires can be simplified. Ease of assembly and maintenance
can thereby be improved.
[0019] An air-conditioning outdoor unit according to a sixth aspect of the present invention
is the air-conditioning outdoor unit of any of the first through fifth aspects, wherein
a gap is present between the outdoor heat exchanger and the rotor. Therefore, in this
air-conditioning outdoor unit, the rotor can be ensured not to come into contact with
the outdoor heat exchanger, and damage to the tabular rotor can be prevented.
<Advantageous Effects of Invention>
[0020] In the air-conditioning outdoor unit according to the first aspect of the present
invention, decreases in the performance of the outdoor heat exchanger can be prevented.
[0021] Also, the product can be kept from becoming too large.
[0022] In the air-conditioning outdoor unit according to the second aspect of the present
invention, the air-conditioning outdoor unit can be made smaller.
[0023] In the air-conditioning outdoor unit according to the third aspect of the present
invention, the air-conditioning outdoor unit can be made thinner.
[0024] In the air-conditioning outdoor unit according to the fourth aspect of the present
invention, the degree of freedom in the design of the electrical component box can
be improved.
[0025] In the air-conditioning outdoor unit according to the fifth aspect of the present
invention, ease of assembly and maintenance can be improved.
[0026] In the air-conditioning outdoor unit according to the sixth aspect of the present
invention, damage to the rotor can be prevented.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027]
FIG. 1 is a schematic refrigerant circuit diagram of an air conditioning apparatus
comprising an air-conditioning outdoor unit according to an embodiment of the present
invention.
FIG. 2 is a front view of an air-conditioning outdoor unit according to an embodiment
of the present invention.
FIG. 3 is a perspective view of an air-conditioning outdoor unit according to an embodiment
of the present invention.
FIG. 4 is a plan view of an air-conditioning outdoor unit according to an embodiment
of the present invention.
FIG. 5 is an exploded view of a humidifying unit.
FIG. 6 is a drawing for illustrating the air flow in the humidifying rotor.
FIG. 7 is a drawing for illustrating the moisture-releasing area, moisture-adsorption
area, and reheating area of the humidifying rotor.
FIG. 8 is a drawing for illustrating the arrangement of the humidifying unit and the
electrical component box in an air-conditioning outdoor unit according to Modification
A.
FIG. 9 is a perspective view of a guide provided to an air-conditioning outdoor unit
according to Modification C.
FIG. 10 is a perspective view of a humidifying unit provided to the air-conditioning
outdoor unit according to Modification C.
FIG. 11 is a plan view of the air-conditioning outdoor unit according to Modification
C.
DESCRIPTION OF EMBODIMENTS
[0028] An embodiment of the present invention is described below with reference to the drawings.
Embodiments of the air-conditioning outdoor unit 30 according to the present invention
are not limited to the embodiment described below, and can be altered within a range
that does not deviate from the scope of the invention.
(1) Overall configuration
[0029] An air conditioning apparatus 10 comprising the air-conditioning outdoor unit 30
according to an embodiment of the present invention is provided with an air-conditioning
indoor unit 20 in addition to the air-conditioning outdoor unit 30 as shown in FIG.
1, and is configured with the air-conditioning indoor unit 20 and the air-conditioning
outdoor unit 30 connected by a communication tube 12. This air conditioning apparatus
10 has a plurality of operation modes including an air-cooling operation, an air-warming
operation, a dehumidifying operation, a humidifying operation, a ventilation operation,
and others, and these operation modes can be combined as appropriate.
[0030] During the air-cooling operation and the air-warming operation, indoor air is cooled
and/or warmed, heat exchange is performed by the air-conditioning indoor unit 20 and
the air-conditioning outdoor unit 30 respectively, and heat moves through the communication
tube 12 between the air-conditioning indoor unit 20 and the air-conditioning outdoor
unit 30. To enable such heat exchange and heat movement to take place, the air conditioning
apparatus 10 has a refrigerant circuit such as the one shown in FIG. 1. Connected
to the refrigerant circuit are, primarily, a compressor 31, a four-way switching valve
32, an outdoor heat exchanger 33, an electric valve 34, and an indoor heat exchanger
21. The indoor heat exchanger 21 is provided to the air-conditioning indoor unit 20,
and the compressor 31, the four-way switching valve 32, the outdoor heat exchanger
33, and the electric valve 34 are provided to the air-conditioning outdoor unit 30.
Within the communication tube 12 are a liquid refrigerant tube 14 and a gas refrigerant
tube 16 substantially connecting the air-conditioning indoor unit 20 and the air-conditioning
outdoor unit 30.
[0031] During the humidifying operation and the ventilation operation, outdoor air is supplied
into the room, and air therefore moves from the air-conditioning outdoor unit 30 to
the air-conditioning indoor unit 20 via an air supply duct 18 within the communication
tube 12. During the humidifying operation in particular, highly humid air containing
a large amount of moisture is supplied from the air-conditioning outdoor unit 30 to
the air-conditioning indoor unit 20, and moisture is therefore actively taken from
the outdoor air in the air-conditioning outdoor unit 30. Therefore, the air-conditioning
outdoor unit 30 comprises a humidifying unit 60 having the function of taking moisture
from outdoor air.
(1-1) Action of refrigerant circuit
[0032] The action of the refrigerant circuit is no different from some conventional refrigerant
circuits, but the action of the refrigerant circuit shown in FIG. 1 is described in
a simple manner.
[0033] During air-cooling, the four-way switching valve 32 is connected in the solid-line
state shown in FIG. 1, and refrigerant compressed and discharged by the compressor
31 is sent to the outdoor heat exchanger 33 via the four-way switching valve 32. Refrigerant
that has lost heat through heat exchange with outdoor air in the outdoor heat exchanger
33 is sent to the electric valve 34. Refrigerant in a high-pressure liquid state is
changed to a low-pressure state by the electric valve 34. The refrigerant expanded
by the electric valve 34 passes through a liquid shut-off valve 37 and the liquid
refrigerant tube 14 via a filter 35, and enters the indoor heat exchanger 21. Refrigerant
that has gained heat and risen in temperature through heat exchange with indoor air
in the indoor heat exchanger 21 is sent through the gas refrigerant tube 16 and a
gas shut-off valve 38 to the four-way switching valve 32. Because the four-way switching
valve 32 is connecting the gas shut-off valve 38 and an accumulator 36, refrigerant
sent from the indoor heat exchanger 21 through the gas refrigerant tube 16 is sent
to the compressor 31 via the accumulator 36 and drawn into the compressor 31.
[0034] During air-warming, the four-way switching valve 32 is connected in the dashed-line
state shown in FIG. 1, and refrigerant compressed and discharged by the compressor
31 is sent to the indoor heat exchanger 21. The refrigerant moves through a path opposite
that of air-cooling, and after exiting the outdoor heat exchanger 33, the refrigerant
returns to the compressor 31. In other words, during air-warming, refrigerant circulates
sequentially through the compressor 31, the four-way switching valve 32, the gas refrigerant
tube 16, the indoor heat exchanger 21, the liquid refrigerant tube 14, the electric
valve 34, the outdoor heat exchanger 33, the four-way switching valve 32, the accumulator
36, and the compressor 31.
(2) Detailed configuration
(2-1) Configuration of air-conditioning indoor unit 20
[0035] In addition to the indoor heat exchanger 21, the air-conditioning indoor unit 20
is also provided with an indoor fan 22 driven by a motor, the fan being provided on
the downstream side of the indoor heat exchanger 21, as shown in FIG. 1. For example,
a crossflow fan is employed as the indoor fan 22. When the indoor fan 22 is driven,
indoor air drawn in through an intake port 23 in the upper part of the air-conditioning
indoor unit 20 is passed through the indoor heat exchanger 21 and blown out through
a blow-out port 24 in the lower part of the air-conditioning indoor unit 20.
[0036] In the air-conditioning indoor unit 20, an air supply port 25 of the air supply duct
18 is provided in a space on the upstream side of the indoor heat exchanger 21. The
air supply duct 18 is connected to the humidifying unit 60, and air sent from the
humidifying unit 60 is supplied through the air supply port 25 to the space on the
upstream side of the indoor heat exchanger 21. When the air sent from the humidifying
unit 60 is highly humid, the indoor fan 22 is driven while this air is being supplied
through the air supply port 25, whereby the humidity of conditioned air blown out
from the blow-out port 24 of the air-conditioning indoor unit 20 can be increased.
At this time, the indoor heat exchanger 21 is simultaneously used as a condenser,
whereby the air-conditioning indoor unit 20 can be made to perform the humidifying
operation and the air-warming operation simultaneously.
(2-2) Configuration of air-conditioning outdoor unit 30
(2-2-1) Summary of configuration of air-conditioning outdoor unit 30
[0037] The air-conditioning outdoor unit 30 comprises a casing 40. The interior of the casing
40 is divided by a partitioning plate 43 into an air-blower chamber S1 and a machinery
chamber S2, as shown in FIG. 1. In the air-conditioning outdoor unit 30, the air-blower
chamber S1 and machinery chamber S2 are shielded by the partitioning plate 43 so that
the airflow does not flow into the machinery chamber S2 from the air-blower chamber
S1.
[0038] In addition to the above-described devices constituting the refrigerant circuit and
the humidifying unit 60, the air-conditioning outdoor unit 30 also has an outdoor
fan 39 placed in front of the outdoor heat exchanger 33. The outdoor fan 39 and the
outdoor heat exchanger 33 are disposed in the air-blower chamber S1 as shown in FIG.
1, and the compressor 31, the four-way switching valve 32, the electric valve 34,
and the accumulator 36 are disposed in the machinery chamber S2.
(2-2-2) Casing 40
[0039] FIG. 2 is a front view of the air-conditioning outdoor unit 30, showing a state in
which an electrical component box 50, a grill, and part of a front plate 46 have been
taken off of the air-conditioning outdoor unit 30. FIG. 3 is a perspective view of
the air-conditioning outdoor unit 30, showing the air-conditioning outdoor unit 30
with the main body 51 of the electrical component box 50, the grill, and a top plate
48 taken off, and the part of the front plate 46 taken off in FIG. 2 is shown as an
imaginary surface. FIG. 4 is a plan view of the air-conditioning outdoor unit 30,
showing a state in which the top plate 48 of the air-conditioning outdoor unit 30
has been taken off. The arrow in FIG. 4 indicates the flow of air through a moisture-adsorption
area 63a of a humidifying rotor 63.
[0040] The casing 40 of the air-conditioning outdoor unit 30 comprises a front plate 46,
a left-side plate 45, a right-side plate 47, a top plate 48, and a bottom plate 49,
as shown in FIGS. 2, 3, and 4.
[0041] A circular blow-out port 44 is formed in the front plate 46, and a ring-shaped bell
mouth 46a is attached to the periphery of the blow-out port 44, as shown in FIGS.
2 and 3. The front-surface side of the blow-out port 44 is covered by a grill (not
shown), and is configured so that a propeller 39b of the outdoor fan 39, described
hereinafter, does not come into contact with objects outside of the air-conditioning
outdoor unit 30. The grill is attached to the front plate 46 of the casing 40.
[0042] The left-side plate 45 is molded into a lattice shape as shown in FIG. 3, and is
able to guide outdoor air into the outdoor heat exchanger 33 from the left side. The
right-side plate 47 constitutes the entire right-side surface and some of the rear
surface extending to the right-side surface from the right edge of a second portion
33b of the outdoor heat exchanger 33, described hereinafter.
[0043] A protective metal mesh covering the second portion 33b of the outdoor heat exchanger
33 is attached to the rear side of the air-blower chamber S1. Though omitted from
the drawings, the protective metal mesh has openings formed for guiding outdoor air
into the second portion 33b of the outdoor heat exchanger 33.
[0044] In the present embodiment, an intake port 72 that serves as an inlet of a moisture-releasing
pathway, described hereinafter, is formed in the right-side plate 47.
[0045] The partitioning plate 43 extends forward from the right edge of the outdoor heat
exchanger 33 as shown in FIG. 4, and extends upward from the bottom plate 49. Therefore,
the interior of the casing 40 can be regarded as being divided into the air-blower
chamber S 1 and the machinery chamber S2, which are laterally aligned on either side
of the partitioning plate 43. The partitioning plate 43 is placed at an incline relative
to the forward-backward direction so that the lateral width of the machinery chamber
S2 increases toward the front (FIG. 4). In the present embodiment, the partitioning
plate 43 is curved. Also the rear part of the partitioning plate 43 extends from the
bottom plate 49 to the top plate 48. Formed in the front and middle part of the partitioning
plate 43 is an opening 43a cut out from the upper edge downward (see FIGS. 3 and 4).
Part of the humidifying unit 60 and part of the electrical component box 50, described
hereinafter, are disposed in the opening 43a. The electrical component box 50 has
a main body 51 and a heat sink 52. The main body 51 may be made of, e.g., aluminum
or another metal, or an elastic resin. The resin material could be, e.g., high impact
polystyrene (HIPS), acrylonitrile butadiene styrene (ABS), or the like. The main body
51 is a box-shaped member that opens forward, and is disposed so that the opening
is positioned in the front as seen in the front view of the air-conditioning outdoor
unit 30. Specifically, the main body 51 is considered to be disposed in the front
of the interior of the machinery chamber S2. Also installed in the main body 51 is
a control substrate (not shown) holding a collection of electronic components for
driving the various devices provided to the air-conditioning outdoor unit 30. The
control substrate is disposed so that the surface where the electronic components
and the like are disposed faces the opening of the main body 51. The front plate 46
is disposed so as to close the opening of the main body 51. Therefore, removing the
front plate 46 exposes the control substrate, and maintenance is easily performed
within the main body 51. Also the main body 51 is set up along a vertical plane. The
phrase "the main body 51 is set up along a vertical plane" used here includes any
interpretation from the main body 51 not being inclined whatsoever relative to a vertical
plane, to the main body 51 being disposed at an incline of about ±15° relative to
a vertical plane. The main body 51 of the present embodiment, however, is not inclined
whatsoever relative to a vertical plane. Therefore, the main body 51 has an upright
placement in which the width direction (thickness direction) extends forward and backward
so as to save space in the forward-backward direction. The heat sink 52 is composed
of fins for releasing to the exterior the heat generated by the electrical components
housed in the main body 51, and is disposed so as to protrude into the air-blower
chamber S1 through the opening 43a. In the present embodiment, the entire heat sink
52 is disposed on the side of the air-blower chamber S1, but part of the heat sink
52 may be disposed on the side of the machinery chamber S2. The front edge part of
the partitioning plate 43 is attached against the front plate 46.
(2-2-3) Outdoor heat exchanger 33
[0046] The outdoor heat exchanger 33 is L-shaped in a top view as seen in FIGS. 3 and 4,
and has a first portion 33a facing the left-side plate 45 of the casing 40, and the
second portion 33b facing the protective metal mesh constituting the back surface
of the casing 40.
[0047] The outdoor heat exchanger 33 has a height that reaches from the bottom plate 49
to the top plate 48. The outdoor heat exchanger 33 has numerous fins extending lengthwise
in the height direction, and heat transfer tubes attached horizontally through the
fins. The heat transfer tubes are disposed in numerous rows in the height direction
by turning back multiple times at both ends of the outdoor heat exchanger 33.
(2-2-4) Outdoor fan 39
[0048] The outdoor fan 39 is a fan for blowing outdoor air at the front-surface side (the
forward side) of the air-conditioning outdoor unit 30 after the outdoor air has been
drawn in through the outdoor heat exchanger 33 from the back-surface side (the rearward
side) of the outdoor heat exchanger 33, and in the present embodiment, the outdoor
fan is a propeller fan. The outdoor fan 39 has a fan motor 39a and a propeller 39b
driven by the fan motor 39a. The propeller 39b is disposed so as to be partially within
the space enclosed by the bell mouth 46a. The fan motor 39a is attached to the back-surface
side of the propeller 39b, and the rotating shaft of the propeller 39b and the drive
shaft of the fan motor 39a are coupled. Furthermore, the fan motor 39a is supported
by a fan motor stand (not shown). The fan motor stand is attached to a secure plate
(not shown) secured to the bottom plate 49 and an upper end 33t of the outdoor heat
exchanger 33.
(2-2-5) Humidifying unit 60
[0049] FIG. 5 is an exploded view of the humidifying unit 60. The humidifying unit 60 has
a moisture-adsorption pathway and a moisture-releasing pathway, and is set up so that
the moisture-adsorption pathway is positioned in the air-blower chamber S1 of the
air-conditioning outdoor unit 30 and the moisture-releasing pathway is positioned
in the machinery chamber S2 of the air-conditioning outdoor unit 30.
[0050] In the air-conditioning outdoor unit 30, the upper end of the humidifying unit 60
is positioned so as to be near the upper end (peak) 33t of the outdoor heat exchanger
33 or lower than the upper end 33t of the outdoor heat exchanger 33. In the present
embodiment, the upper end of the humidifying unit 60 is the upper end of a frame 70,
and the height of the upper end of the frame 70 coincides with the height of the upper
end 33t of the outdoor heat exchanger 33.
[0051] The humidifying unit 60 comprises primarily the humidifying rotor 63, a heater 71,
and a turbofan 75. One part of the humidifying rotor 63 is disposed in the moisture-adsorption
pathway, and the other part of the humidifying rotor 63, the heater 71, and the turbofan
75 are disposed in the moisture-releasing pathway. The humidifying rotor 63, the heater
71, and the turbofan 75 are secured to the frame 70. More specifically, the heater
71 and the humidifying rotor 63 are secured to a support plate 73, and the support
plate 73 is attached to the back-surface side of the frame 70 (see FIG. 5). The turbofan
75 is attached to the front-surface side of the frame 70, which is the side opposite
the surface to which the support plate 73 is attached (see FIG. 5).
(2-2-5-1) Humidifying rotor 63
[0052] The humidifying rotor 63 is a single tabular piece of moisture-adsorption/moisture-releasing
material. The shape of the humidifying rotor 63 may be any sort of shape as long as
it is tabular. In the present embodiment, the humidifying rotor 63 is of a discoidal
shape. The single tabular piece of moisture-adsorption/moisture-releasing material
referred to here includes not only a simple tabular moisture-adsorption/moisture-releasing
material constituting the humidifying rotor 63, but also a combination of multiple
moisture-adsorption/moisture-releasing materials of similar or different shapes constituting
a single tabular humidifying rotor 63. The humidifying rotor 63 is a zeolite rotor
having a honeycomb structure formed by burning zeolite or the like. The humidifying
rotor 63 is attached so as to rotate with the center of the disc as the rotational
axis, and is rotatably driven by the motive power of a rotor-driving motor 65 transmitted
to a gear 64 provided to the periphery of the humidifying rotor 63. The rotor-driving
motor 65 is disposed entirely within the machinery chamber S2. Furthermore, in the
present embodiment, the rotor-driving motor 65 is disposed farther diametrically outward
than the outer periphery of the humidifying rotor 63 so as not to overlap the humidifying
rotor 63 in a front view.
[0053] The zeolite or other adsorbent forming the humidifying rotor 63 has the property
of allowing moisture to be adsorbed from the air at, e.g., room temperature, and releasing
moisture due to being brought to a temperature higher than room temperature by the
air heated to a high temperature by the heater 71 or the like. Specifically, the area
of the humidifying rotor 63 that is not exposed to high-temperature air is the moisture-adsorption
area 63a onto which moisture is adsorbed from the outdoor air, and the area that is
exposed to high-temperature air is a moisture-releasing area 63b which releases the
adsorbed moisture.
[0054] The humidifying rotor 63 is disposed so that the rotational axis extends in the forward-backward
direction. Specifically, the humidifying rotor 63 is set up along a vertical plane.
The phrase "the humidifying rotor 63 is set up along a vertical plane" used here includes
any interpretation from the humidifying rotor 63 not being inclined whatsoever relative
to a vertical plane, to the humidifying rotor 63 being disposed at an incline of about
±15° relative to a vertical plane. The humidifying rotor 63 of the present embodiment,
however, is not inclined whatsoever relative to a vertical plane. Therefore, the humidifying
rotor 63 has an upright placement in which the width direction (thickness direction)
extends forward and backward so as to save space in the forward-backward direction.
[0055] Furthermore, the humidifying rotor 63 is disposed in the opening 43a of the partitioning
plate 43 so that the moisture-adsorption area 63a of the humidifying rotor 63 is positioned
in the air-blower chamber S1 of the air-conditioning outdoor unit 30 and the moisture-releasing
area 63b of the humidifying rotor 63 is positioned in the machinery chamber S2 of
the air-conditioning outdoor unit 30, as shown in FIG. 1. The moisture-adsorption
area 63a of the humidifying rotor 63 of the present embodiment is disposed between
the outdoor heat exchanger 33 and the outdoor fan 39 of the air-blower chamber S1,
and is also disposed in front of the second portion 33b of the outdoor heat exchanger
33 with a gap therebetween so as to face the second portion 33b of the outdoor heat
exchanger 33. Therefore, the moisture-adsorption area 63a of the humidifying rotor
63 falls within the air-blowing pathway passing through the outdoor heat exchanger
33, and this section is the moisture-adsorption pathway. Specifically, the moisture-adsorption
area 63a of the humidifying rotor 63 is disposed within the moisture-adsorption pathway.
The moisture-releasing area 63b of the humidifying rotor 63 is disposed within the
moisture-releasing pathway.
[0056] An upper end 63t of the humidifying rotor 63 of the present embodiment is positioned
lower than the upper end 33t of the outdoor heat exchanger 33. As long as the air-conditioning
outdoor unit 30 does not have too large of a product size, the relationship of height
positions between the humidifying rotor 63 and the outdoor heat exchanger 33 is not
limited as such. For example, the height position of the upper end 63t of the humidifying
rotor 63 is preferably near the upper end 33t of the outdoor heat exchanger 33. Specifically,
the height of the upper end 63t of the humidifying rotor 63 may coincide with the
height of the upper end 33t of the outdoor heat exchanger 33, or it may be in a slightly
higher position than the upper end 33t of the outdoor heat exchanger 33 (e.g., a position
about 10% higher than the height of the outdoor heat exchanger 33).
[0057] The humidifying rotor 63 is set up so as to, in a front view, at least partially
overlap the electrical component box 50 set up along a vertical plane (see FIG. 3).
In the present embodiment, the vertical plane of the electrical component box 50 and
the vertical plane of the moisture-releasing area 63b and reheating area 63c of the
humidifying rotor 63 are positioned facing each other in a front view. The humidifying
rotor 63 and the electrical component box 50 are disposed so as to be aligned forward
to backward as shown in FIG. 4.
(2-2-5-2) Heater 71
[0058] The heater 71 is provided next to the moisture-releasing area 63b of the humidifying
rotor 63. The heater 71 has a structure in which an electric heating wire (not shown)
is provided within a tubular casing, and outdoor air drawn in through the intake port
72 and sent to the humidifying rotor 63 is heated by the electric heating wire. In
the humidifying rotor 63, when heated air passes through the openings in the honeycomb
structure of the humidifying rotor 63, air drawn into the turbofan 75 is humidified
by the release of moisture from the humidifying rotor 63.
[0059] The heater 71 is attached to a heater support member 74 as shown in FIG. 5. The heater
support member 74 has a semicircular base part 74a and an outer wall part 74b projecting
from the peripheral edge of the base part 74a, and the side of the heater support
member (the side facing the humidifying rotor 63) is left open. The heater 71 is then
attached to the base part 74a so as to be covered by the heater support member 74.
The heater support member 74 constitutes part of the moisture-releasing pathway. The
casing of the heater 71 and the heater support member 74, needing to be heat resistant,
are formed by sheet metal. The heater 71 is installed in the machinery chamber S2
of the air-conditioning outdoor unit 30, and is disposed opposite of the electrical
component box 50 across the humidifying rotor 63.
[0060] In the present embodiment, the vertical plane of the electrical component box 50
and the vertical plane of the heater support member 74 overlap in a front view by
approximately fifty percent. However, depending on the shapes and placements of the
electrical component box 50 and the heater support member 74, eighty percent or more
of the vertical plane of the heater support member 74 may overlap the vertical plane
of the electrical component box 50 in a front view.
(2-2-5-3) Turbofan 75
[0061] The turbofan 75 creates an air flow directed from the air-conditioning outdoor unit
30 toward the air-conditioning indoor unit 20. The turbofan 75 is disposed so as to
face the heater 71 across the humidifying rotor 63. The electrical component box 50
is disposed opposite of the heater 71 across the turbofan 75 and humidifying rotor
63. Furthermore, the turbofan 75 is installed in the machinery chamber S2 as shown
in FIGS. 2 and 4.
[0062] The turbofan 75 has a fan motor 75a, an impeller 75b driven by the fan motor 75a,
and a fan casing 75c for housing the impeller 75b, and air drawn in from the direction
of the rotational axis of the impeller 75b is blown radially outward. In the air-conditioning
outdoor unit 30, the rotational axis of the impeller 75b is disposed so as to extend
in the forward-backward direction. Therefore, the turbofan 75 has an upright placement
which saves space in the forward-backward direction. An intake part 76 of the turbofan
75 opens rearward. A discharge part 77 of the turbofan 75 opens downward. A humidifying
duct 78 is connected to the discharge part 77, and the air supply duct 18 is attached
to the humidifying duct 78. Therefore, air drawn in through the intake part 76 of
the turbofan 75 is guided to the air supply duct 18 via the humidifying duct 78, and
passes through the air supply duct 18 to be blown out from the blow-out port 24 of
the air-conditioning indoor unit 20.
(3) Air flow during humidifying operation
[0063] FIG. 6 is a drawing for illustrating the air flow in the humidifying rotor 63. FIG.
7 is a drawing for illustrating the moisture-releasing area 63b, moisture-adsorption
area 63a, and reheating area 63c of the humidifying rotor 63. FIG. 7 shows the moisture-releasing
area 63b, the moisture-adsorption area 63a, and the reheating area 63c when the humidifying
rotor 63 is viewed from the front. The flow of air during the humidifying operation
is described below. In the air conditioning apparatus 10 the humidifying operation
is performed in combination with the air-warming operation. Therefore, the compressor
31 and the outdoor fan 39 are driven during the humidifying operation. Also during
the humidifying operation, the humidifying rotor 63 is caused to rotate at a predetermined
rotational speed by the motive power of the rotor-driving motor 65, and the heater
71 and turbofan 75 are driven. Because the humidifying rotor 63 rotates, the moisture
adsorbed onto the humidifying rotor 63 by the moisture adsorption in the moisture-adsorption
area 63a is carried to the moisture-releasing area 63b along with the rotation of
the humidifying rotor 63, and moisture that had been adsorbed then desorbs due to
the moisture releasing in the moisture-releasing area 63b, whereby the air surrounding
the moisture-releasing area 63b is humidified. The humidifying rotor 63 of the present
embodiment rotates counterclockwise as seen from the front, and the section functioning
as the moisture-adsorption area 63a rotates and upon reaching a position of facing
the heater support member 74, this section then functions as the moisture-releasing
area 63b.
[0064] During the humidifying operation, because the outdoor fan 39 is driven, an air flow
is generated whereby outdoor air drawn in through the outdoor heat exchanger 33 from
the back-surface side of the outdoor heat exchanger 33 is blown out to the front-surface
side of the air-conditioning outdoor unit 30. Because the moisture-adsorption area
63a of the humidifying rotor 63 is positioned in the air-blower chamber S1 so as to
face the second portion 33b of the outdoor heat exchanger 33, primarily outdoor air
that has passed through the second portion 33b of the outdoor heat exchanger 33 then
passes through the moisture-adsorption area 63a of the humidifying rotor 63 from the
rear to the front. Air that has passed through the moisture-adsorption area 63a of
the humidifying rotor 63 is blown out from the blow-out port 44 via the bell mouth
46a.
[0065] Also during the humidifying operation, because the turbofan 75 is driven, an air
flow is created from the air-conditioning outdoor unit 30 to the air-conditioning
indoor unit 20, i.e., an air flow whereby outdoor air drawn in through the intake
port 72 is blown out to the air supply duct 18 via the humidifying rotor 63 and the
heater 71. More specifically, outdoor air drawn in through the intake port 72 first
flows into the front of the humidifying rotor 63, and moves through the humidifying
rotor 63 from the front to the rear to reach the heater 71. The outdoor air that has
reached the heater 71 then passes through the casing of the heater 71. The outdoor
air is heated by the heater 71 at this time. The air that has passed through the casing
of the heater 71 proceeds to the moisture-releasing area 63b of the humidifying rotor
63 and passes through the moisture-releasing area 63b of the humidifying rotor 63
from the rear to the front. At this time, the moisture-releasing area 63b of the humidifying
rotor 63 releases moisture due to being exposed to the air raised in temperature by
the heater 71. Having left the moisture-releasing area 63b of the humidifying rotor
63, the air is then drawn into the turbofan 75 via an opening 70a formed in the frame
70, and the air is blown out to the air supply duct 18 via the humidifying duct 78.
The air thus humidified by the humidifying rotor 63 is guided to the air-conditioning
indoor unit 20 via the air supply duct 18.
[0066] In this humidifying unit 60, the section of the humidifying rotor 63 that is positioned
in the air-blower chamber S1 is the moisture-adsorption area 63a as shown in FIGS.
6 and 7. In the humidifying rotor 63 positioned in the machinery chamber S2, the section
positioned downstream in the air flow from the heater 71 is the moisture-releasing
area 63b, and the other section is the reheating area 63c. The reheating area 63c
is the section where outdoor air drawn in through the intake port 72 first passes
through the humidifying rotor 63. Because the humidifying rotor 63 of the present
embodiment rotates counterclockwise in a front view, the function of the humidifying
rotor 63 is switched sequentially to the moisture-adsorption area 63a, the moisture-releasing
area 63b, and the reheating area 63c. The reheating area 63c is high in temperature
due to being the section that had just previously been the moisture-releasing area
63b. Therefore, outdoor air drawn in through the intake port 72 is heated by the heat
of the reheating area 63c due to passing through the reheating area 63c. The reheating
area 63c is cooled by the passage of outdoor air and afterwards becomes the moisture-adsorption
area 63a due to the rotation of the humidifying rotor 63.
(4) Characteristics
(4-1)
[0067] In a conventional air-conditioning outdoor unit, the humidifying rotor is set up
along a horizontal plane, and the entire humidifying rotor is positioned in an air-blower
chamber, whereby part of the outdoor heat exchanger is closed off by the humidifying
unit, outdoor air does not readily pass through the section of the outdoor heat exchanger
that is closed off by the humidifying unit, and the performance of the outdoor heat
exchanger sometimes decreases.
[0068] In view of this, in the present embodiment, the humidifying rotor 63 is set up along
a vertical plane. The moisture-adsorption area 63a of the humidifying rotor 63 is
positioned in the air-blower chamber S1 of the air-conditioning outdoor unit 30, and
the moisture-releasing area 63b of the humidifying rotor 63 is positioned in the machinery
chamber S2 of the air-conditioning outdoor unit 30. Therefore, in comparison with
the humidifying rotor 63 being disposed along a horizontal plane, the distance between
the outdoor heat exchanger 33 and the humidifying rotor 63 can be increased, and air
flow to the outdoor heat exchanger 33 is unlikely to be blocked.
[0069] The decrease in performance of the outdoor heat exchanger 33 that would follow with
outdoor air not readily flowing to the outdoor heat exchanger 33 can thereby be prevented.
[0070] In the present embodiment, because the humidifying rotor 63 is set up along a vertical
plane, the depth of the air-conditioning outdoor unit 30, i.e., the dimension in the
forward-backward direction can be shortened and product size can therefore be reduced
more than if the humidifying rotor 63 were to be set up along a horizontal plane.
(4-2)
[0071] The upper end 63t of the humidifying rotor 63 of the present embodiment is positioned
lower than the upper end 33t of the outdoor heat exchanger 33. Therefore, the height
dimension of the air-conditioning outdoor unit 30 can be kept lower than when the
humidifying rotor 63 is disposed in a higher position than the upper end 33t of the
outdoor heat exchanger 33. The product can be kept from increasing in size without
reducing the capability of the outdoor heat exchanger 33.
[0072] Due to the upper end 63t of the humidifying rotor 63 being in a lower position than
the top plate 48, it is easier for outdoor air to effectively flow to the moisture-adsorption
area 63a of the humidifying rotor 63.
(4-3)
[0073] In the present embodiment, the heater 71, the rotor-driving motor 65, and the main
body 51 of the electrical component box 50 are disposed in the machinery chamber S2
of the air-conditioning outdoor unit 30. Due to these electrical components being
thus disposed together in the machinery chamber S2, wire routing and other wiring
work is simplified. It is thereby easier to assemble and maintain (service) the air-conditioning
outdoor unit 30.
[0074] In the present embodiment, because the moisture-releasing area 63b of the humidifying
rotor 63 is positioned in the machinery chamber S2 of the air-conditioning outdoor
unit 30, the waste heat of the compressor 31 and/or electronic components can be utilized
to heat the outdoor air drawn in through the intake port 72.
(4-4)
[0075] In the present embodiment, a gap is present between the humidifying rotor 63 and
the outdoor heat exchanger 33. Therefore, the humidifying rotor 63 can be prevented
from coming into contact with the outdoor heat exchanger 33. Damage to the humidifying
rotor 63 can thereby be prevented. It is particularly preferable from the standpoint
of preventing damage to configure rotating members not to come into contact with the
outdoor heat exchanger 33, as is done with the humidifying rotor 63 of the present
embodiment.
(4-5)
[0076] In the present embodiment, the heater 71 is disposed opposite of the electrical component
box 50 across the humidifying rotor 63. Thus, the heater 71 of the humidifying unit
60 and the electrical component box 50 can be separated as far as possible by disposing
the heater 71 opposite of the electrical component box 50 across the humidifying rotor
63 in the air-conditioning outdoor unit 30. Therefore, heat from the heater 71 does
not readily reach the electrical component box 50 directly, and the risk that the
electronic components and control substrate in the main body 51 of the electrical
component box 50 will be degraded by heat can be reduced. Heat from the heater 71
can be impeded from reaching the electrical component box 50, and the risk that the
release of heat from the heat sink 52 will be hindered can be reduced, by separating
the heater 71 of the humidifying unit 60 and the electrical component box 50 as far
as possible.
[0077] Because heat from the heater 71 does not readily reach the electrical component box
50, there is a higher degree of freedom in the members constituting the electrical
component box 50. Specifically, when, e.g., the electrical component box 50 is formed
from a resin or another material, the material must be selected with heat resistance
taken into account, but because heat from the heater 71 does not readily reach the
electrical component box 50, there is a higher degree of freedom in selecting the
material.
[0078] Furthermore, using the humidifying rotor 63 as a reference, when the heater 71 and
the electrical component box 50 are disposed on the same side, space must be ensured
to keep the electrical component box 50 away from the heater 71, but because the electrical
component box 50 can be separated from the heater 71 by disposing the heater 71 opposite
of the electrical component box 50 across the humidifying rotor 63, there is no need
to ensure separate space for separating the electrical component box 50 and the heater
71, and the space in the air-conditioning outdoor unit 30 can be effectively utilized.
[0079] In the present embodiment, the vertical plane of the electrical component box 50
and the vertical plane of the heater support member 74 overlap in a front view by
approximately fifty percent. Depending on the shapes and placements of the electrical
component box 50 and the heater support member 74, eighty percent or more of the vertical
plane of the heater support member 74 may overlap the vertical plane of the electrical
component box 50 in a front view. Even when the heater 71 and the electrical component
box 50 are superposed in a large area, heat from the heater 71 can be impeded from
reaching the electrical component box 50 because the heater 71 and the electrical
component box 50 are disposed so as to be superposed from opposite sides of the humidifying
rotor 63.
(4-6)
[0080] In the present embodiment, the turbofan 75 is disposed so as to face the heater 71
across the humidifying rotor 63, and the electrical component box 50 is disposed opposite
of the heater 71 across the turbofan 75 and the humidifying rotor 63. Due to the electrical
component box 50 thus being disposed opposite of the heater 71 across the turbofan
75 and the humidifying rotor 63, the heater 71 and the electrical component box 50
can be further separated by a distance equal to the turbofan 75. Heat from the heater
71 reaching the electrical component box 50 can thereby be further suppressed.
(4-7)
[0081] In the present embodiment, the rotor-driving motor 65 is disposed in the machinery
chamber S2. Therefore, the rotor-driving motor 65 is not cooled by the driving of
the outdoor fan 39, and abnormalities in the rotor-driving motor 65 that such cooling
would cause can be prevented. Durability of the rotor-driving motor 65 can thereby
be ensured.
[0082] When the rotor-driving motor is disposed in the air-blower chamber and is also disposed
between the humidifying rotor and the outdoor fan, outdoor air does not flow to the
humidifying rotor due to ventilation resistance from the rotor-driving motor, and
there is a risk that the moisture-adsorbing performance of the humidifying rotor will
decrease.
[0083] In the present embodiment, the rotor-driving motor 65 is disposed farther diametrically
outward than the outer periphery of the humidifying rotor 63 so that the rotor-driving
motor 65 and the humidifying rotor 63 do not overlap in a front view. It is therefore
possible to prevent decreases in the moisture-adsorbing performance of the humidifying
rotor 63 that would be caused by ventilation resistance from the rotor-driving motor
65.
(4-8)
[0084] In the present embodiment, at least part of the electrical component box 50 is set
up so as to overlap the humidifying rotor 63 in a front view. Therefore, the lateral
directional dimension of the casing 40 can be smaller than if the humidifying rotor
63 and the electrical component box 50 were to be aligned laterally so as to not overlap
in a front view.
[0085] The air-conditioning outdoor unit 30 can thereby be made smaller.
(4-9)
[0086] In the present embodiment, the humidifying rotor 63 and the electrical component
box 50 are both set up along a vertical plane. The humidifying rotor 63 and the electrical
component box 50 are also disposed so as to be aligned front to back. Therefore, the
width dimension of the casing 40 in the forward-backward direction can be smaller
than if, e.g., the electrical component box 50 were to be set up so that the longitudinal
direction extends along a horizontal plane, i.e., if the electrical component box
50 were to be laid on its side. The air-conditioning outdoor unit 30 can thereby be
made thinner.
(4-10)
[0087] In the present embodiment, the machinery chamber S2 is formed so that the lateral
width increases toward the front. The electrical component box 50 is disposed in the
front of the machinery chamber S2 interior. Therefore, the lateral directional dimension
of the electrical component box 50 can be greater than if the electrical component
box 50 were to be disposed in the rear of the machinery chamber S2 interior. The degree
of freedom in the design of the electrical component box 50 can thereby be improved.
(5) Modifications
(5-1) Modification A
[0088] In the air-conditioning outdoor unit 30 of the above embodiment, the humidifying
unit 60 and the electrical component box 50 are disposed in order from the rear toward
the front. However, if the humidifying rotor 63 is disposed so as to extend across
the partitioning plate 43, the positional relationship between the humidifying unit
60 and the electrical component box 50 is not limited thereto, and the electrical
component box 50 and the humidifying unit 60 may, e.g., be disposed in order from
the rear toward the front as shown in FIG. 8.
(5-2) Modification B
[0089] In the air-conditioning outdoor unit 30 of the above embodiment, outdoor air reaches
the moisture-adsorption area 63a of the humidifying rotor 63 immediately after passing
through the outdoor heat exchanger 33, due to the outdoor fan 39 being driven. However,
the moisture-adsorption pathway through the moisture-adsorption area 63a of the humidifying
rotor 63 is not limited thereto. For example, part of the grill may have a closed
surface, and some of the air flow generated by the outdoor fan 39 may run into this
closed surface and then reach the moisture-adsorption area 63a of the humidifying
rotor 63.
(5-3) Modification C
[0090] FIG. 9 is a perspective view of a guide 69. FIG. 10 is a perspective view of the
humidifying unit 60 with the guide 69 attached. FIG. 11 is a plan view of the air-conditioning
outdoor unit 30 comprising the humidifying unit 60 with the guide 69 attached, showing
the air-conditioning outdoor unit 30 with the top plate 48 removed. The arrow in FIG.
11 indicates the flow of air through the moisture-adsorption area 63a of the humidifying
rotor 63.
[0091] In addition to the above embodiment, the humidifying unit 60 may be provided with
a guide 69 constituting part of the moisture-adsorption pathway. For example, the
guide 69 is preferably provided so as to extend from the outer peripheral edge of
the humidifying rotor 63 or the vicinity thereof toward the outdoor heat exchanger
33. From the standpoint of making it easier for outdoor air that has passed through
the outdoor heat exchanger 33 to reach the moisture-adsorption area 63a of the humidifying
rotor 63, it is preferable for the guide 69 to extend from the outer peripheral edge
of the humidifying rotor 63 to the vicinity of the outdoor heat exchanger 33, and
even more preferable for the distal end of the guide 69 to abut the outdoor heat exchanger
33. Furthermore, the space between the outdoor heat exchanger 33 and the moisture-adsorption
area 63a of the humidifying rotor 63 may be enclosed by the partitioning plate 43,
the guide 69, and the top plate 48.
[0092] The shape of the guide 69 is not particularly limited as long as the guide extends
from the outer peripheral edge of the humidifying rotor 63 or the vicinity thereof
toward the outdoor heat exchanger 33. With the end of the guide 69 on the side near
the outdoor heat exchanger 33 being the inlet-side end and the end on the side near
the humidifying rotor 63 being the outlet-side end, the shape of the inlet-side end
in particular is preferably designed on the basis of the capability of the outdoor
heat exchanger 33 and the moisture-absorbing capability of the humidifying rotor 63.
[0093] Thus, due to the presence of the guide 69 extending toward the outdoor heat exchanger
33 from the outer peripheral edge of the moisture-adsorption area 63a of the humidifying
rotor 63, it can be made easier for outdoor air that has passed through the outdoor
heat exchanger 33 to reach the moisture-adsorption area 63a of the humidifying rotor
63 and pass through the moisture-adsorption area 63a. As a result, situations of outdoor
air not passing through the moisture-adsorption area 63a of the humidifying rotor
63 due to ventilation resistance can be avoided. The risk of decreased moisture adsorption
in the humidifying rotor 63 can thereby be reduced.
INDUSTRIAL APPLICABILITY
[0094] The present invention makes it possible to prevent decreases in the performance of
an outdoor heat exchanger, and the invention is effective for application in an air-conditioning
outdoor unit comprising a humidifying unit.
REFERENCE SIGNS LIST
[0095]
- 30
- Air-conditioning outdoor unit
- 31
- Compressor
- 33
- Outdoor heat exchanger
- 33t
- Upper end of outdoor heat exchanger
- 39
- Outdoor fan
- 40
- Casing
- 60
- Humidifying unit
- 63
- Humidifying rotor (rotor)
- 63a
- Moisture-adsorption area
- 63b
- Moisture-releasing area
- 63t
- Upper end of humidifying rotor
- 65
- Rotor-driving motor
- 71
- Heater
CITATION LIST
PATENT LITERATURE
[0096] [Patent Literature 1] Japanese Laid-open Patent Application No.
2012-251692