JP4341080B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[0002]
The present invention relates to a ceiling-embedded or ceiling-suspended air conditioner.
[Prior art]
[0003]
FIG. 18 shows a conventional ceiling-embedded air conditioner X0. The air conditioner X0 has a rectangular box shape with a lower end opened and a casing 101 disposed in an embedded state on the ceiling back space 83 side facing an opening 82 formed in the ceiling 81, and a rectangular flat plate shape. In addition, the ceiling of the casing 101 is placed in an in-machine space 112 surrounded by an interior panel 102 formed with a suction port 103 near its center and air outlets 104, 104,. A centrifugal impeller 108 that is rotationally driven by a motor 110 attached to a substantially central portion of the surface 101a is disposed, and a heat exchanger 107 is disposed outside the centrifugal impeller 108 in a state of being close to the centrifugal impeller 108. Configured. In this case, the heat exchanger 107 is composed of a plurality of plate-like fins arranged in a stacked manner in the plate thickness direction and a plurality of heat transfer tubes arranged through the plate-like fins. It is a so-called cross fin type heat exchanger having a plate-like appearance, and is bent and used in a substantially rectangular tube shape so as to correspond to each of the air outlets 104, 104,.
[0004]
In this air conditioner X0, the indoor air sucked from the suction port 103 in accordance with the operation of the centrifugal impeller 108 is directed from the centrifugal blade 109 portion toward the heat exchanger 107 located radially outward. The heat exchanger 107 exchanges heat with the refrigerant and blows out the air from the air outlets 104, 104,...
[0005]
A known example of an air conditioner having such a configuration is disclosed in, for example, Japanese Utility Model Laid-Open No. 8-1023.
[Problems to be solved by the invention]
[0006]
In recent years, there has been a demand to improve indoor air quality at the same time as air conditioning from the viewpoint of improving the comfort of air conditioning in the room, while improving the aesthetics of the room by reducing the number of exposed devices or the exposed area on the ceiling surface. There is also a requirement to maintain, and as one method for simultaneously achieving these conflicting requirements, it is conceivable to add a ventilation function to the air conditioner.
[0007]
By the way, in the conventional ceiling-embedded type or ceiling-suspended type air conditioner, as described above, it has a substantially rectangular cylindrical shape and is placed inside the heat exchanger 107 that is vertically arranged. In general, the centrifugal impeller 108 is disposed. In that case, however, the centrifugal impeller 108 is disposed from the viewpoint of reducing the flow velocity of the air blown out from the centrifugal impeller 108 to suppress the ventilation pressure loss as much as possible. The diameter is set as large as possible within the range that can be installed inside the heat exchanger 107.
[0008]
For this reason, the gap between the inner circumference of the heat exchanger 107 and the outer circumference of the centrifugal impeller 108 is relatively small, and it is almost impossible to dispose a ventilation impeller in this gap space. It is.
[0009]
For this reason, as shown in FIG. 19, the suction port is provided between the casing 101 housing the heat exchanger 107, the centrifugal impeller 108, and the like, and the indoor panel 102 attached to the indoor side surface of the ceiling 81. 103, a chamber member 120 having a space 121 communicating with 103 is introduced, air is introduced into the space 121 of the chamber member 120 through an air supply passage 122, and indoor air is introduced through the exhaust pipe 123. Exhaust air has been proposed (see Japanese Patent Application Laid-Open No. 5-223276).
[0010]
However, according to the configuration in which the air conditioner is provided with a ventilation function by attaching the chamber member in this way, the comfort of air conditioning is ensured, but the height of the air conditioner as a whole is increased by the height of the chamber member. For example, in a building where the height of the ceiling is low, the air conditioner cannot be installed, or even if it can be installed, the installation work may be difficult. There was a problem in terms of installation workability.
[0011]
Therefore, the present invention realizes comfortable air conditioning without impairing the applicability or installation workability by enabling the addition of a ventilation function while suppressing the increase in the height dimension as much as possible. The object of the present invention is to provide an air conditioner capable of obtaining cooling capacity.
[Means for Solving the Problems]
[0012]
In the present invention, the following configuration is adopted as a specific means for solving such a problem.
[0013]
Of this application First In the present invention, the casing 1 that is embedded in or suspended from the ceiling 81 with the opened lower end surface facing downward, and the opening end of the casing 1 is mounted from the indoor side, and the portion near the center is suctioned A heat exchanger in which the mouth 3 is formed in an in-machine space 61 surrounded by the interior panel 2 in which the air outlet 4 is formed at a portion near the outer periphery so as to have a substantially cylindrical or substantially conical cylindrical appearance. 21 is accommodated so that the inner peripheral side of the heat exchanger 21 faces the inlet 3 and the outer peripheral side faces the outlet 4, and the internal space 61 is accommodated by the heat exchanger 21 in the inner side corresponding to the inlet 3. The motor 11 is partitioned into a space 62 and an outer space 63 corresponding to the outlet 4, while the motor 11 is mounted in the in-machine space 61 with its axis centered vertically in the inner space 62. It extends between the inner space 62 and the outer space 63 through the space between the lower surface of the drain pan 7 provided at the lower end of the heat exchanger 21 and the upper surface of the indoor panel 2, and the inner side. An opening 65 that allows the suction port 3 to communicate with the heat exchanger 21 is formed at a portion corresponding to the space 62 and a support plate 15 that is rotationally driven by the motor 11 is disposed. A mixed flow impeller provided with a plurality of blades 36, 36,... At a front edge 36 a having a predetermined inclination angle α with respect to the axial direction of the heat exchanger 21 at a portion corresponding to the outer space 63. Alternatively, an impeller 31 that includes an axial flow impeller and rotates on the outer peripheral side of the heat exchanger 21 is provided,
Further, the motor 11 is located above the motor 11 by a motor 12 that is constituted by a centrifugal impeller, a diagonal flow impeller, or an axial flow impeller housed in the fan housing 40 and is arranged substantially coaxially with the motor 11. The impeller 33 is arranged to discharge the air in the inner space 62 directly to the outside through the ceiling back space 83 or the exhaust duct 45 disposed in the ceiling back space 83 by being driven to rotate. It is characterized by that.
[0014]
Of this application Second In the present invention, the casing 1 that is embedded in or suspended from the ceiling 81 with the opened lower end surface facing downward, and the opening end of the casing 1 is mounted from the indoor side, and the portion near the center is suctioned A heat exchanger in which the mouth 3 is formed in an in-machine space 61 surrounded by the interior panel 2 in which the air outlet 4 is formed at a portion near the outer periphery so as to have a substantially cylindrical or substantially conical cylindrical appearance. 21 is accommodated so that the inner peripheral side of the heat exchanger 21 faces the inlet 3 and the outer peripheral side faces the outlet 4, and the internal space 61 is accommodated by the heat exchanger 21 in the inner side corresponding to the inlet 3. While being partitioned into a space 62 and an outer space 63 corresponding to the air outlet 4, the axial center of the inner space 62 is mounted in the inner space 62 while being axially attached. The inner space 62 passing between the lower surface of the drain pan 7 provided at the lower end of the heat exchanger 21 and the upper surface of the indoor panel 2. An opening 65 extending between the outer space 63 and corresponding to the inner space 62 is formed with an opening 65 for communicating the suction port 3 with the heat exchanger 21. A support plate 15 that is rotationally driven by the rotation shaft 11 a is disposed, and a front edge 36 a is predetermined with respect to the axial direction of the heat exchanger 21 at a portion corresponding to the outer space 63 of the support plate 15. Provided with a plurality of blades 36, 36,... Having an inclination angle α and an impeller 31 rotating on the outer peripheral side of the heat exchanger 21. , The motor 11 is formed of a centrifugal impeller, a mixed flow impeller, or an axial flow impeller accommodated in the fan housing 40, and is rotated by the other rotating shaft 11b of the motor 11 so as to be It is characterized in that the impeller 33 for discharging the air in the space 62 to the outside directly through the ceiling back space 83 or through the exhaust duct 45 disposed in the ceiling back space 83 is provided.
【The invention's effect】
[0015]
In the present invention, the following effects can be obtained by adopting such a configuration.
[0016]
(I) Of this application First In the air conditioner according to the invention, the motor 11 mounted in the interior space 61 with its axis oriented in the vertical direction in the inner space 62, straddles between the inner space 62 and the outer space 63. And a support plate 15 that extends and is driven to rotate by the motor 11, and an impeller 31 that rotates on the outer peripheral side of the heat exchanger 21 in a portion corresponding to the outer space 63 of the support plate 15. The indoor air sucked from the inner space 62 side by the impeller 31 is introduced into the outer space 63 through the heat exchanger 21, and further from the outer space 63 through the outlet 4. The air is blown into the room, thereby realizing indoor cooling or heating. In this way, the impeller 31 involved in the air conditioning function is disposed outside the heat exchanger 21 and thus the space above the heat exchanger 21 can be provided in the space above the heat exchanger 21. The inner space 62 is constituted by a centrifugal impeller, a mixed flow impeller, or an axial flow impeller accommodated in the fan housing 40 and is rotationally driven by a motor 12 disposed substantially coaxially with the motor 11. An impeller 33 for discharging the air in the interior directly through the ceiling space 83 or through the exhaust duct 45 disposed in the ceiling space 83 is disposed, and the indoor air is discharged by the impeller 33 outdoors. The air quality in the room is improved by discharging to the room.
[0017]
Therefore, according to the air conditioner of the present invention, the impeller 31 that is rotationally driven by the motor 11 is disposed outside the heat exchanger 21, and is located inside the heat exchanger 21 and above the motor 11. In addition, by adopting a configuration in which the impeller 33 for ventilation is rotated by the motor 12 that is arranged substantially coaxially with the motor 11, both the air conditioning and the ventilation in the room can be increased, and the height of the air conditioner can be increased. As a result, the air conditioner with a ventilation function can be easily attached to a building with a relatively low ceiling, for example. Equipment applicability and installation workability will be improved.
[0018]
In this case, since the impeller 33 is disposed substantially coaxially on the upper side of the motor 11 disposed in the inner space 62, the impeller 31 disposed outside the heat exchanger 21. As a result, a part of the air flow that flows from the inner space 62 side through the heat exchanger 21 to the outer space 63 side rises in the inner space 62 and moves to the impeller 33 arranged on the upper side thereof. Since the air is sucked, the suction resistance in the impeller 33 is small, and the energy saving performance is improved by reducing the driving power.
[0019]
On the other hand, on the outer peripheral side of the heat exchanger 21 having a substantially cylindrical or substantially conical cylindrical appearance, the front edge 36a of the blade 36 is inclined with a predetermined inclination angle α with respect to the axial direction of the heat exchanger 21. Since the impeller 31 composed of a flow impeller or an axial impeller is arranged, the heat exchanger 21 has a vertically long form, and the impeller 31 is biased toward the lower end side of the heat exchanger 21. Despite being arranged, the front edge 36a of the blade 36 on the suction side of the impeller 31 faces a wide range in the height direction of the heat exchanger 21. As a result, with the rotation of the impeller 31, the inner space 62 located inside the heat exchanger 21 is disposed in the outer space 63 located outside the heat exchanger 21 through the heat exchanger 21. The air flow sucked into the impeller 31 side flows substantially uniformly over the heat exchanger 21 over substantially the entire height direction thereof, and the wind speed distribution in the heat exchanger 21 becomes good, and the wind speed is increased. Due to the improved distribution, the effective utilization of the heat exchanger 21 is increased, and the performance of the air conditioner can be improved accordingly, and the ventilation pressure loss in the heat exchanger 21 is reduced, so that the silent operation by reducing the blowing sound is achieved. Energy savings can be promoted by improving the performance and lowering the shaft power.
[0020]
Further, since the impeller 31 is on the downstream side of the heat exchanger 21 and sucks room air from the upstream side to the downstream side of the heat exchanger 21, the impeller 31 is involved in the rotation of the impeller 31. First, in the heat exchanger 21 portion, the air flow flows substantially parallel to the fins of the heat exchanger 21, and the air flow is the same as in the conventional configuration in which the centrifugal impeller is disposed inside the heat exchanger 21. Is prevented from flowing into the heat exchanger as a swirling flow and interfering with the fins as much as possible, the ventilation pressure loss in the heat exchanger 21 is further reduced, and the quiet operation and energy saving of the air conditioner are further improved. Will be promoted.
[0021]
(B) Of this application Second The air conditioner according to the present invention includes a motor 11 having two rotary shafts 11a and 11b attached in an interior space 61 with its axis centered vertically in the interior space 62, and the interior space 62. A support plate 15 extending between the outer space 63 and being driven to rotate by one rotating shaft 11a of the motor 11 is disposed, and a portion corresponding to the outer space 63 of the support plate 15 is disposed. Since the impeller 31 that rotates on the outer peripheral side of the heat exchanger 21 is provided, the indoor air sucked from the inner space 62 side by the impeller 31 passes through the outer space 63 through the heat exchanger 21. And then blown out from the outer space 63 through the outlet 4 into the room, thereby realizing indoor cooling or heating. In this way, the impeller 31 involved in the air conditioning function is disposed outside the heat exchanger 21 and thus the space above the heat exchanger 21 can be provided in the space above the heat exchanger 21. , Which is composed of a centrifugal impeller, a mixed flow impeller, or an axial flow impeller housed in the fan housing 40, and is driven to rotate by the other rotating shaft 11b of the motor 11, so that the air in the inner space 62 is discharged. An impeller 33 that discharges directly to the outside through the ceiling space 83 or the exhaust duct 45 disposed in the ceiling space 83 is disposed, and indoor air is discharged to the outdoors by the impeller 33. The air quality in the room is improved.
[0022]
Therefore, according to the air conditioner of the present invention, the impeller 31 that is rotationally driven by the one rotating shaft 11a of the motor 11 is disposed outside the heat exchanger 21, and inside the heat exchanger 21 and By adopting a configuration in which the ventilation impeller 33 is rotated by the other rotating shaft 11b of the motor 11 at a position above the motor 11, compatibility between indoor air conditioning and ventilation can be achieved with the height of the air conditioner. As a result, an air conditioner with a ventilation function can be easily attached to a building with a relatively low ceiling, for example. The applicability and installation workability of the air conditioner will be good.
[0023]
In addition, in this case, the impeller 31 and the impeller 33 are configured to be rotationally driven by the motor 11 of both shafts provided with the two rotation shafts 11a and 11b. Compared with the case of rotationally driving by a dedicated motor, cost reduction by reducing the number of members is promoted.
[0024]
Further, since the impeller 33 is disposed substantially coaxially on the upper side of the motor 11 disposed in the inner space 62, the impeller 31 disposed outside the heat exchanger 21 causes the inner A part of the air flow flowing from the space 62 side through the heat exchanger 21 to the outer space 63 side is sucked into the impeller 33 arranged on the upper side in the middle of rising in the inner space 62. The suction resistance in the impeller 33 is small, and the energy saving performance is improved by reducing the driving power.
[0025]
On the other hand, on the outer peripheral side of the heat exchanger 21 having a substantially cylindrical or substantially conical cylindrical appearance, the front edge 36a of the blade 36 is inclined with a predetermined inclination angle α with respect to the axial direction of the heat exchanger 21. Since the impeller 31 composed of a flow impeller or an axial impeller is arranged, the heat exchanger 21 has a vertically long form, and the impeller 31 is biased toward the lower end side of the heat exchanger 21. Despite being arranged, the front edge 36a of the blade 36 on the suction side of the impeller 31 faces a wide range in the height direction of the heat exchanger 21. As a result, with the rotation of the impeller 31, the inner space 62 located inside the heat exchanger 21 is disposed in the outer space 63 located outside the heat exchanger 21 through the heat exchanger 21. The air flow sucked into the impeller 31 side flows substantially uniformly over the heat exchanger 21 over substantially the entire height direction thereof, and the wind speed distribution in the heat exchanger 21 becomes good, and the wind speed is increased. Due to the improved distribution, the effective utilization of the heat exchanger 21 is increased, and the performance of the air conditioner can be improved accordingly, and the ventilation pressure loss in the heat exchanger 21 is reduced, so that the silent operation by reducing the blowing sound is achieved. Energy savings can be promoted by improving the performance and lowering the shaft power.
[0026]
Furthermore, since the impeller 31 is on the downstream side of the heat exchanger 21 and sucks room air from the upstream side to the downstream side of the heat exchanger 21, the impeller 31 is involved in the rotation of the impeller 31. First, in the heat exchanger 21 portion, the air flow flows substantially parallel to the fins of the heat exchanger 21, and the air flow is the same as in the conventional configuration in which the centrifugal impeller is disposed inside the heat exchanger 21. Is prevented from flowing into the heat exchanger as a swirling flow and interfering with the fins as much as possible, the ventilation pressure loss in the heat exchanger 21 is further reduced, and the quiet operation and energy saving of the air conditioner are further improved. Will be promoted.
DETAILED DESCRIPTION OF THE INVENTION
[0027]
Hereinafter, an air conditioner according to the present invention will be specifically described based on some preferred embodiments.
[0028]
A: First embodiment
1 to 3 show a ceiling-embedded indoor unit X1 as a first embodiment of an air conditioner according to the present invention. The indoor unit X1 has a heat exchanger 21 and an impeller unit M for air conditioning, which will be described later, disposed in a rectangular interior space 61 surrounded by a casing 1 and an indoor panel 2 described below, and the casing 1 A ventilation impeller unit N (corresponding to “ventilation mechanism N” in the claims), which will be described later, is arranged on the top plate 1A. Hereinafter, the configuration of each of these components will be described.
[0029]
A-1: Casing 1
As shown in FIGS. 1 to 3, the casing 1 has a rectangular box shape with an opening at the lower end, and is mounted in an embedded state on the side of the ceiling space 83 facing the opening 82 formed in the ceiling 81 of the building. It is done. An opening 1Aa of a predetermined size is provided at a substantially central position of the top plate 1A in the casing 1, and a support provided with a through hole 19 serving as a passage for exhausted air near the outer periphery of the opening 1Aa. The plate 18 is fixed. A motor 11 for rotationally driving the impeller unit M described below is fixed to the lower surface of the center portion of the support plate 18 in an inverted posture with its axis oriented in the vertical direction.
[0030]
Further, an air supply port 44 is formed in the side plate 1B of the casing 1 so as to penetrate the side plate 1B inward and outward.
[0031]
A-2: Indoor panel 2
As shown in FIG. 1, the indoor panel 2 is integrally formed of a resin material in a substantially rectangular thick plate shape, and a circular suction port 3 is formed in the center portion in the plane direction. A plurality (four in this embodiment) of air outlets 4, 4,... Extending in an arc shape so as to surround the periphery of the air inlet 3 are formed on the radially outer portion of the air inlet 3. Yes. The air outlet 4 has an inclined opening that inclines to the side as it goes from the upper surface to the lower surface of the indoor panel 2. In addition, a grill 5 is attached to the suction port 3, and a filter 6 is disposed on the upper surface side of the grill 5.
[0032]
A-3: Heat exchanger 21
As shown in FIGS. 1 to 3, the heat exchanger 21 includes a plurality of plate-like fins stacked and arranged in the plate thickness direction, and a plurality of heat transfer tubes arranged through the fins. It is constituted by a so-called cross fin type heat exchanger having a thick plate-like appearance as a whole, and in this embodiment, this is further curved in an arc shape so that both ends 21a and 21b are opposed to each other with a predetermined interval. It is shaped into a cylindrical shape having a substantially C-shaped planar shape and having an inner diameter close to the inner diameter of the suction port 3 of the indoor panel 2.
[0033]
The cylindrical heat exchanger 21 is erected in the in-machine space 61 with its axis line substantially aligned with the axis line of the motor 11, and the top plate 1 </ b> A of the casing 1 and the indoor panel 2. Between the upper side and the annular drain pan 7 which is disposed in close proximity. Moreover, in this case, the space portion 43 formed by the discontinuous portions in which both end portions 21a and 21b of the heat exchanger 21 are opposed to each other corresponds to the side plate 1B of the casing 1 in which the air supply port 44 is formed. Yes.
[0034]
Due to the arrangement of the heat exchanger 21, the internal space 61 is located inside the heat exchanger 21 and communicates with the suction port 3, and is located outside the heat exchanger 21 and the blower The outer space 63 communicating with the outlets 4, 4,...
[0035]
In this embodiment, the heat exchanger 21 is formed in a cylindrical shape as described above. However, the heat exchanger 21 in the present invention is not limited to such a form, and in short, a concentric cross section. (I.e., the cross-sectional shape in the plane orthogonal to the axis is the cross-section at any position in the axial direction), the peripheral wall portion of the heat exchanger 21 has a concentric shape centered on the axis position. Therefore, not only the shape of the substantially cylindrical shape, or the shape of the peripheral wall extending linearly in the axial direction, such as the shape of a substantially conical cylinder, A form in which the peripheral wall extends in a curved line in the axial direction can also be adopted.
[0036]
Further, the air supply port 44 is opened facing the outer space 63.
[0037]
A-4: Impeller unit M
The impeller unit M is an impeller unit for air conditioning, and includes an impeller 31 and an impeller 32 described below, and a support plate 15 that integrally supports the impellers 31 and 32. .
[0038]
A-4-a: Support plate 15
The support plate 15 integrally supports an impeller 31 and an impeller 32, which will be described below, and rotationally drives them by the motor 11, and is formed of a metal material or a resin material. A small-diameter bottomed cylindrical fixing portion 15a fixed to the rotating shaft of the motor 11 and a substantially “U” -shaped cross-sectional shape having an open top surface, and the drain pan 7 is fitted in the recess in a non-contact manner. In this state, the annular extending portion 15b disposed in the facing space 66 between the lower surface of the drain pan 7 and the upper surface of the indoor panel 2 and the outer upper edge of the extending portion 15b are continuously connected to the blowing portion from here. A conical tube-shaped hub portion 15c that extends downward in a slanting manner so as to substantially match the outlet direction of the outlet 4 and that has a tip facing the vicinity of the inner edge of the outlet 4 is configured.
[0039]
The fixed portion 15a fixed to the motor 11 side and positioned on the upper side of the in-machine space 61, and the extending portion 15b positioned on the drain pan 7 side and disposed in the lower portion of the in-machine space 61 are as follows. Since it is deviated both in the vertical direction and in the horizontal direction, it is necessary to connect the fixed portion 15a and the extending portion 15b by connecting members that incline and to integrate them, but in this embodiment, The blades 37, 37,... Of the impeller 32, which will be described later, are attached between the fixed portion 15a and the extending portion 15b, and the blades 37, 37,. The fixing portion 15a and the extending portion 15b are integrated with each other, and the support plate 15 is constituted by the fixing portion 15a, the extending portion 15b, and the hub portion 15c. Therefore, for example, when adopting a configuration in which the impeller 32 is not provided in another embodiment, an appropriate connecting portion is provided between the fixed portion 15a and the extending portion 15b to integrate them. Become.
[0040]
A-4-b: Impeller 31
The impeller 31 is configured by vertically arranging a plurality of blades 36, 36,... At predetermined intervals in the circumferential direction on the hub portion 15c of the support plate 15 located in the outer space 63. In the mixed flow impeller, the support plate 15 is driven to rotate by the motor 11 so that the support plate 15 rotates outside the heat exchanger 21 to perform a required air blowing action. The leading edge 36 a of the blade 36 is inclined so as to have a predetermined inclination angle α toward the radially outer side with respect to the axis of the heat exchanger 21. Therefore, the front edge 36a of the blade 36 faces almost the entire area in the vertical direction of the outer peripheral surface of the heat exchanger 21 that is provided inside the impeller 31 and has a vertically long cross-sectional shape. The inclination angle α of the front edge 36a of the blade 36 is set to an optimum value based on the horizontal distance between the impeller 31 and the heat exchanger 21, the height dimension of the heat exchanger 21, and the like. In general air conditioners, it is sufficient to set within an angle range of about 20 ° to 90 °.
[0041]
A-4-c: Impeller 32
The impeller 32 is configured by arranging a plurality of blades 37, 37,... At a predetermined interval in the circumferential direction across the fixed portion 15 a and the extending portion 15 b of the support plate 15. In the mixed flow impeller, the support plate 15 is driven to rotate by the motor 11 so that the support plate 15 rotates inside the heat exchanger 21 to perform a required air blowing action. In this case, the impeller 32 has a blowing capacity that can cancel out the ventilation pressure loss of the airflow flowing between the fixed portion 15a and the extending portion 15b of the support plate 15 by the pressure increase by the blade 37. Thus, the mounting angle of the blade 37 is set so that the swirl component of the blowing air blown from the blade 37 can be suppressed as small as possible.
[0042]
A-5: Impeller unit N
The impeller unit N corresponds to the “ventilation mechanism N” in the claims, and includes an impeller 33 described below.
[0043]
The impeller 33 is constituted by a centrifugal impeller in which a plurality of blades 38, 38,... Are attached to the outer peripheral portion of the support plate 16 at a predetermined interval in the circumferential direction, and is accommodated in a fan housing 40 described below. The motor 12 is rotationally driven.
[0044]
The fan housing 40 is a substantially circular opening body whose outer peripheral walls are sequentially enlarged curved surfaces. The fan housing 40 is provided with an opening serving as a suction port 30 of the impeller 33 at the center position and the top plate 1A of the casing 1 described above. It is attached to the upper surface side of the partition plate 29 fixed to the opening 1Aa so as to cover the suction port 30. The impeller 33 is accommodated in the fan housing 40, and the impeller 33 is a motor fixed to the inner surface of the top plate 40 b of the fan housing 40 and substantially coaxial with the motor 11. 12 is housed in a state of being attached to the motor 12, and is driven to rotate by the motor 12.
[0045]
Further, one end of a rectangular cylindrical ventilation passage 41 disposed on the top plate 1A of the casing 1 is connected to the fan outlet 40a formed on the outer peripheral wall of the fan housing 40. Further, the other end of the ventilation path 41 is connected to an end of an exhaust duct 45 disposed through the inside of the ceiling space 83.
[0046]
A-6: Operation explanation
Next, the operation of the indoor unit X1 configured as described above will be described.
In this indoor unit X1, in addition to the indoor air conditioning function which is its original function, the indoor ventilation function which is an additional function is performed.
[0047]
A-6-a: Air conditioning
The air conditioning operation is realized by rotating the impeller unit M by the motor 11. That is, when the impeller unit M is driven to rotate, the indoor air in the indoor space 80 flows in FIG. 1 mainly by the suction action of the impeller 31 (auxiliarily by the pushing action of the impeller 32). As indicated by a line A1, the air is sucked into the inner space 62 from the suction port 3 and converted into warm air or cold air by heat exchange in the heat exchanger 21, and then flows into the outer space 63 and further flows into the stream line A3. As shown in FIG. 4, the air is blown out from the outer space 63 to the indoor space 80 through the outlets 4, 4,. As described above, the warm air or the cool air is blown out from the outlet 4 to the indoor space 80, whereby the indoor space 80 is heated or cooled.
[0048]
In this case, in this embodiment, the impeller 31 formed of a mixed flow impeller is disposed outside the heat exchanger 21 and the front edge 36a of the blade 36 of the impeller 31 is disposed at the front edge. 36a is inclined by a predetermined inclination angle α so as to face almost the entire outer peripheral surface of the heat exchanger 21 in the height direction. Therefore, even if the heat exchanger 21 has a vertically long shape, the blades The air flow A1 that flows from the inner space 62 side to the outer space 63 side from the inner space 62 side as the vehicle 31 rotates rotates the heat exchanger 21 over substantially the entire area in the height direction. Evenly flowing, the wind speed distribution in the heat exchanger 21 is improved as much as possible. By improving the wind speed distribution, the effective utilization of the heat exchanger 21 is increased, and the performance of the air conditioner can be improved accordingly. Moreover, since the ventilation pressure loss in the heat exchanger 21 is reduced by improving the wind speed distribution, the blowing noise is reduced, the quiet operation of the indoor unit X1 is improved, and the shaft power necessary for securing the required air volume. As a result, the energy saving performance in the operation of the indoor unit X1 is promoted.
[0049]
Further, the impeller 31 is disposed outside the heat exchanger 21, that is, on the downstream side of ventilation, and the impeller 31 sucks room air from the upstream side to the downstream side of the heat exchanger 21. Therefore, the rotation of the impeller 31 does not give any swirling component to the air flow on the suction side (inner peripheral side) of the heat exchanger 21. On the other hand, since the impeller 32 is arranged on the inner peripheral side of the heat exchanger 21, the blowing air from the impeller 32 has a swirling component, but the mounting angle of the blade 37 in the impeller 32 is set. By setting it as small as possible, the swirl component is small. As a result, the air flow A <b> 1 flowing into the heat exchanger 21 from the inner peripheral side in response to the suction action of the impeller 31 and the pushing action of the impeller 32 is applied to each fin of the heat exchanger 21. As a result, the air flow A1 is prevented from interfering with the fins of the heat exchanger 21 as much as possible, and the heat exchanger caused by the interference is prevented. The ventilation pressure loss at 21 is made as small as possible. On the other hand, by providing the impeller 32, an increase in the ventilation pressure loss of the airflow flowing between the fixed portion 15a and the extending portion 15b in the support plate 15 can be increased by the pressure increase by the impeller 32. Offset as much as possible. Therefore, the ventilation pressure loss of the impeller 32 is larger than the ventilation pressure loss that is increased due to the interference between the air flow and the fins, so that the ventilation pressure loss in the support plate 15 is offset by the pressure increase by the impeller 32. By setting the attachment angle of the blades 37, the ventilation pressure loss as a whole of the indoor unit X1 is reduced, so that further improvement in the quiet operation and energy saving of the indoor unit X1 can be expected.
[0050]
On the other hand, in the indoor unit X1 of this embodiment, the air outlet 4 provided in the indoor panel 2 has an annular shape corresponding to the outer peripheral shape of the impeller 31, so that the impeller 31 rotates. The blown air blown out from the impeller 31 is smoothly blown out in a conical cylinder shape from the blowout port 4 toward the indoor space 80, and receives a centrifugal force and spreads radially outward. As a result, an air flow distribution with small temperature unevenness is realized in a wide area of the indoor space 80, and the comfort of heating or cooling is improved accordingly.
[0051]
A-6-b: Ventilation effect
The ventilation action is performed by taking outdoor air into the room (supplying action) and discharging the indoor air to the outdoors (exhaust action).
[0052]
The air supply action is performed using the suction force of the impeller 31. That is, since the air supply port 44 is provided in the side plate 1B of the casing 1 and the exhaust duct 45 always faces the outer space 63 where the suction force of the impeller 31 works, With the rotation, as indicated by a streamline A2 in FIG. 1, the air is sucked by the impeller 31, and outdoor air passes through the ceiling space 83 and enters the outer space 63 from the air supply port 44. Then, the air is blown out toward the indoor space 80 in a state of being mixed with the conditioned air from the heat exchanger 21 in the outer space 63, thereby realizing an air supply action.
[0053]
The exhausting action is performed by the blowing action of the impeller 33. That is, when the impeller 33 is rotationally driven by the motor 12, as indicated by a streamline A4 in FIG. 1, the room is sucked into the inner space 62 from the suction port 3 by the suction action of the impeller 31. A part of the air is sucked into the suction port 30 from the through hole 19 of the support plate 18 due to the suction action of the impeller 33, and further, the air passage 41 and the exhaust duct 45 are caused by the impeller 33. The air is discharged to the outside through this, thereby realizing the exhaust action. In this case, since the impeller 33 is disposed substantially coaxially on the upper side of the motor 11 disposed in the inner space 62, the exhaust air from the suction port 3 to the suction port 30 of the impeller 33. Thus, the suction resistance in the impeller 33 is reduced accordingly, and the energy saving is improved by reducing the driving power.
[0054]
By performing the above air supply action and exhaust action, ventilation of the indoor space 80 is realized, and a synergistic effect of this ventilation action and the above-described air conditioning action enables more comfortable air conditioning than the case of only the air conditioning action. It becomes.
[0055]
A-6-c: Structural advantages
As described above, according to the indoor unit X1 according to this embodiment, the impeller 31 that is rotationally driven by the motor 11 is disposed outside the heat exchanger 21, inside the heat exchanger 21, and above By adopting a configuration in which the impeller 33 for ventilation is rotated by the motor 12 disposed substantially coaxially with the motor 11 at a position above the motor 11, both air conditioning and ventilation in the room can be achieved. As a result, an air conditioner with a ventilation function can be easily applied to a building with a relatively low ceiling. Therefore, the applicability and installation workability of the indoor unit X1 are improved.
[0056]
Furthermore, in the indoor unit X1 of this embodiment, the fan housing 40 in which the impeller 33 is accommodated, the fan outlet 40a provided in the fan housing 40, and the exhaust duct 45 connecting the exhaust duct 45. Are arranged facing the ceiling space 83 on the upper surface side of the top plate 1A of the casing 1, and the suction port 30 of the impeller 33 is provided in the top plate 1A of the casing 1, When a ventilation function is added to a normal indoor unit that does not have a ventilation function, this can be easily realized by adding an external structure with almost no change in the internal structure of the indoor unit.
[0057]
A-7: Other configurations
The indoor unit X1 of this embodiment includes a “seal structure” and a “condensation prevention structure” described below as ancillary structures in addition to the basic structure as described above.
[0058]
A-7-a: Seal structure
In the indoor unit X1 of this embodiment, as described above, the support plate 15 bypasses the lower side of the drain pan 7 located at the lower end of the heat exchanger 21 from the inner space 62 side and bypasses the outer space 63. Since it is arranged to extend to the side, the low pressure from the high-pressure side through the counter space 66 formed between the detour portion, that is, the lower surface of the drain pan 7 and the upper surface of the indoor panel 2 facing it. Air will leak to the side. Since such an air leak contributes to a decrease in the capacity of the indoor unit X1, it is possible to prevent the air leak as much as possible from the viewpoint of maintaining or improving the capacity of the indoor unit X1. Necessary.
[0059]
Therefore, in this embodiment, as a seal structure for preventing such air leakage, several suitable specific structures are proposed as described below. The following seal structures can be implemented independently or in combination.
[0060]
A-7-a-i: First seal structure
The first seal structure is a structure as shown in FIGS. That is, this seal structure uses the rotation of the impeller unit M (that is, the rotation of the support plate 15) to generate an air flow that flows from the low pressure side to the high pressure side. The flow of the leaked air flow from the high pressure side to the low pressure side is suppressed, and as a result, air leakage is suppressed. Specifically, as shown in FIG. 4, the support plate 15 is extended through the facing space 66 formed between the bottom surface of the drain pan 7 and the top surface of the indoor panel 2 facing the drain pan 7. The seal mechanism P is provided on both the upper and lower surfaces of the portion 15b, and the seal mechanism P is constituted by a spiral groove seal provided with a centripetal blade 51 or a centrifugal blade 52.
[0061]
Here, the flow direction of air on each of the upper surface side and the lower surface side of the extended portion 15b, which is the premise for setting the structure of the spiral groove seal, was examined. That is, first, as shown in FIG. 4, four points (a), (b), (c), and (d) were set around the extending portion 15b of the support plate 15. Here, point (a) is the suction side of the impeller 32, point (b) is the outlet side of the impeller 32, point (c) is the suction side of the impeller 31, and point (d) is the impeller. 31 is the outlet side. As shown by the pressure line in FIG. 8, the pressure gradually decreases from the suction port 3 to the point (a) and reaches a negative pressure, and then reverses at the point (a) to turn from the point (a) to the point (b). Rises to a positive pressure at the point (b). Furthermore, it reverses at the point (b) and rapidly decreases from the point (b) to the point (c), and reaches the maximum negative pressure at the point (c). Furthermore, it reverses at the point (c) and rapidly rises from the point (c) to the point (d), and becomes positive pressure at the point (d). And it falls gradually from this point (d) to the blower outlet 4, and reaches atmospheric pressure in this blower outlet 4. FIG.
[0062]
From this pressure state, the centripetal point is directed from the point (d) to the point (a) below the extended portion 15b of the support plate 15, that is, between the points (a) and (d). The air flows in the direction, and the air flows in the centrifugal direction from the point (b) to the point (c) above the extending portion 15b of the support plate 15, that is, between the points (b) and (c). Can be seen. Therefore, in order to suppress the leaked air flow by the air flow in the direction opposite to the air flow, it is sufficient to generate a centrifugal air flow below the extending portion 15b of the support plate 15, and conversely the support. It is only necessary to generate an air flow in the centripetal direction on the upper side of the extending portion 15b of the plate 15.
[0063]
Based on this knowledge, a centrifugal blade 52 having a shape capable of generating an air flow in the centrifugal direction with respect to the rotation direction of the support plate 15 (in the direction of the arrow) is provided below the extension portion 15b of the support plate 15. On the other hand, on the upper side of the extending portion 15b of the support plate 15, a centripetal blade 51 having a shape capable of generating an air flow in a centripetal direction with respect to the rotation direction of the support plate 15 (the direction of the wing arrow) is provided. Is.
[0064]
Thus, by providing the centripetal blade 51 and the centrifugal blade 52 at the extending portion 15b of the centripetal blade 51, air leakage from the facing space 66 is prevented as much as possible.
[0065]
Depending on the size of the opening 65 and the pressure loss of the heat exchanger 21, the pressure at the point (d) may be smaller than the pressure at the point (a). The lower blade of the extending portion 15b of the plate 15 may be the centripetal blade 51.
[0066]
A-7-a-B: Second seal structure
In the second seal structure, as shown in FIG. 6, a seal mechanism P configured by a labyrinth seal is provided in the facing space 66. That is, a plurality of annular ridges 53, 53,... Are provided at predetermined intervals in the radial direction on both the upper surface and the lower surface of the extending portion 15b of the support plate 15. With such a configuration, the leaked air flow that flows in the opposite directions on the upper surface side and the lower surface side of the extending portion 15b of the support plate 15 due to the pressure difference sequentially repeats the flow that expands and contracts in the middle of the leakage flow. As a result, the pressure gradient between the high-pressure side and the low-pressure side is gradually reduced, and the leakage air flow is reduced as much as possible.
[0067]
A-7-b: Condensation prevention structure
As can be seen from the temperature line in FIG. 9, during the cooling operation, the temperature is lower than room temperature between the point (c) on the suction side and the point (d) on the outlet side of the impeller 31. Condensation may occur due to contact between the portion cooled by the cold air blown from the impeller 31 and the room air. Accordingly, in this embodiment, a dew condensation prevention structure suitable for preventing such dew condensation is proposed. Each of the dew condensation prevention structures described below can be implemented alone or in combination with a plurality of structures.
[0068]
A-7-b-i: First dew condensation prevention structure
As shown in FIG. 4, FIG. 6 or FIG. 7, the first dew condensation prevention structure is formed with a reflux port 67 in the outer peripheral vertical wall portion of the extending portion 15 b of the support plate 15. In this structure, the region of the point (c) on the suction side of the wheel 31 and the region of the point (d) on the outlet side of the impeller 31 are communicated.
[0069]
With such a structure, as indicated by the streamline A0 in the figure, a part of the cold air blown out from the impeller 31 is returned to the suction side through the reflux port 67, and around the hub portion 15c. Cold air will circulate constantly. Thus, the presence of the circulating air flow around the hub portion 15c prevents warm indoor air from entering the portion. As a result, even if the vicinity of the extended portion 15b is cooled by cold air, warm indoor air hardly comes into contact with the cooled portion, and condensation at the extended portion 15b is prevented as much as possible. It is.
[0070]
A-7-b-B: Second dew condensation prevention structure
Whereas the first dew condensation prevention structure is designed to prevent the dew condensation by suppressing the intrusion of room air into the part cooled by the cold air, the second dew condensation prevention structure is an excessive amount of cold air. Condensation is prevented by suppressing the cooling itself.
[0071]
That is, as shown in FIGS. 7 and 8, an alternating current electromagnet 54 is disposed on the lower surface of the drain pan 7, while at least the extended portion 15b of the support plate 15 has a magnetic configuration. With this configuration, when an alternating current is passed through the electromagnet 54 to excite it and the support plate 15 is rotated in such a state, an eddy current is generated on the extending portion 15b side in accordance with a change in magnetic flux. . Due to this eddy current, the extension portion 15b generates heat, and the extension portion 15b is prevented from being excessively cooled by the cold air blown from the impeller 31. As a result, even if warm room air enters the extended portion 15b or the like, no condensation occurs here because the extended portion 15b is not cooled excessively.
[0072]
In addition, as a method of using the extending portion 15b of the support plate 15 as a magnetic material, for example, a method in which the entire support plate 15 is made of an iron-based metal, or a resin in which the support plate 15 is mixed with magnetic powder such as iron powder is used. For example, a method of forming the support plate 15 with a resin material, and a method of plating a ferrous metal on the surface of the portion including the extension portion 15b or the hub portion 15c can be considered.
[0073]
A-7-b-C: Third dew condensation prevention structure
Similar to the second dew condensation prevention structure, the third dew condensation prevention structure prevents excessive cooling of the extended portion 15b portion, thereby preventing the occurrence of condensation in the portion. That is, the surface of the extension part 15b and the hub part 15c of the support plate 15 where the occurrence of condensation is concerned is coated with a heat insulating material such as ceramic, or the surface of the extension part 15b and the hub part 15c is flocked. Or a sheet-like heat insulating material is pasted on the surface of the extension part 15b and the hub part 15c.
[0074]
By adopting such a configuration, it is possible to prevent the extension portion 15b and the like from being excessively cooled by the cold air blown from the impeller 31. As a result, even if warm room air intrudes into the extended portion 15b and the like, condensation does not occur here because the extended portion 15b and the like are not excessively cooled.
[0075]
B: Second embodiment
FIG. 10 shows an indoor unit X2 as a second embodiment of the air-conditioning apparatus according to the present invention. The indoor unit X2 has substantially the same basic structure as that of the indoor unit X1 according to the first embodiment, and is different from the indoor unit X1 according to the first embodiment as a motor in the indoor unit X1 of the first embodiment. Whereas the two motors of the motor 11 that rotationally drives the impeller unit M and the motor 12 that rotationally drives the impeller unit N are used, the indoor unit X2 of this embodiment uses the motor 11 is constituted by a double-shaft motor having rotating shafts 11a and 11b at both ends in the axial direction, the impeller unit M is driven to rotate by one rotating shaft 11a, and the impeller unit is driven by the other rotating shaft 11b. By rotating N, installation of the motor 12 is unnecessary.
[0076]
In the indoor unit X2 having such a structure, it is a matter of course that the same operational effect as the indoor unit X1 in the first embodiment can be obtained, but in addition, the motor 11 is configured by a double-axis motor. As a result, for example, the number of members can be reduced and the cost reduction can be promoted as compared with the case where the impeller unit M and the impeller unit N are rotated by dedicated motors. Is.
[0077]
In the case where it is not necessary to constantly ventilate during the air conditioning operation, a communication opening 71 is provided between the ventilation path 41 and the outer space 63 as shown by a chain line in FIG. The opening 71 can be opened and closed by a damper 72. When the ventilation is not required, the communication opening 71 is opened by the damper 72, and the air blown out from the impeller 33 side through the ventilation path 41 is passed through the communication opening 71 to the outer space 63. Reflux to the side. With such a configuration, the heat loss in the cooling / heating operation can be suppressed to the extent that the amount of heat taken out by ventilation (exhaust) is reduced.
[0078]
C: Third embodiment
11 and 12 show an indoor unit X3 as a third embodiment of the air-conditioning apparatus according to the present invention. In this indoor unit X3, in the indoor unit X1 according to the first embodiment, the fan housing 40 in which the impeller 33 is accommodated is exposed and arranged on the upper surface side of the top plate 1A of the casing 1 together with the ventilation path 41. In contrast, only the ventilation path 41 is exposed and disposed on the top plate 1A of the casing 1, and the impeller 33 and the fan housing 40 are disposed in the inner space 62 of the casing 1, As a result, the size in the height direction is further reduced compared to the indoor unit X1 in the first embodiment.
The specific structure is as follows.
[0079]
That is, a partition plate 29 is attached on the top plate 1A so as to cover the opening 1Aa provided on the top plate 1A of the casing 1, and a space between the partition plate 29 and the support plate 18 that supports the motor 11 is provided. The fan housing 40 is disposed, and an impeller 33 that is rotationally driven by the motor 12 is accommodated in the fan housing 40. And the fan blower outlet 40a provided in this fan housing 40 and the said ventilation path 41 arrange | positioned above the said top plate 1A are connected through the communication port 42 formed in the said partition plate 29. FIG.
[0080]
Thus, by arranging the fan housing 40 and the impeller 33 in the inner space 62, in addition to obtaining the same operational effects as the indoor unit X1 according to the first embodiment, Despite the addition of the impeller 33, only the ventilation passage 41 is exposed on the top plate 1A of the casing 1 despite the addition of the ventilation function. For example, the ventilation passage 41 on the top plate 1A of the casing 1 is exposed. Not only is the impeller 33 and the fan housing 40 that accommodates the impeller 33 exposed, the downsizing of the indoor unit X3 is promoted.
[0081]
D: Fourth embodiment
13 and 14 show an indoor unit X4 as a fourth embodiment of the air-conditioning apparatus according to the present invention. In this indoor unit X4, in the indoor unit X3 according to the third embodiment, only the impeller 33 and the fan housing 40 that accommodates the impeller 33 are arranged in the inner space 62. In contrast to the exposed arrangement on the upper surface side of the top plate 1 </ b> A of the casing 1, all of these are arranged in the inner space 62.
[0082]
Therefore, when arranging the ventilation path 41 in the inner space 62, it is necessary to secure an arrangement space for extending the ventilation path 41 from the inner circumference side to the outer circumference side of the heat exchanger 21. For this reason, in this embodiment, as shown in FIG. 14, when disposing the heat exchanger 21, discontinuous portions whose opposite ends 21a and 21b face each other with a predetermined interval are made to correspond to the disposition position of the ventilation path 41. The upper position of the space 43 composed of the discontinuous portions is used as a space for arranging the ventilation path 41.
[0083]
In the indoor unit X4 configured as described above, it is a matter of course that the same operational effects as those of the indoor unit X1 according to the first embodiment can be obtained, but in addition to this, the heat exchanger 21 By using the space portion 43 constituted by the discontinuous portion as an arrangement space for the ventilation path 41, it is possible to arrange the ventilation path 41 in the inner space 62, so that the structure of a normal indoor unit is achieved. In spite of the configuration in which the ventilation function is added by adding the impeller 33, the fan housing 40 and the ventilation path 41, the appearance of the indoor unit X4 is different from that of a normal indoor unit having no ventilation function. As a result, further improvement in applicability and installation workability of the indoor unit X4 can be expected.
[0084]
E: Fifth embodiment
FIG. 15 shows an indoor unit X5 as a fifth embodiment of the air-conditioning apparatus according to the present invention. This indoor unit X5 is based on the configuration of the indoor unit X1 according to the first embodiment shown in FIG. 1, and is different from the indoor unit X1 in the ventilation air discharge structure. That is, in the indoor unit X1 of the first embodiment, the fan outlet 40a provided on the outer peripheral surface of the fan housing 40 that accommodates the impeller 33 configured by a centrifugal impeller is connected to the air passage 41 through the ventilation path 41. In the indoor unit X5 according to this embodiment, the exhaust air is connected to an exhaust duct 45 disposed in the ceiling space 83 and the exhaust air is exhausted to the outside by the exhaust duct 45. A fan air outlet 40a provided on the outer peripheral surface of the fan housing 40 is directly opened in the ceiling space 83, and ventilation air is discharged from the impeller 33 into the ceiling space 83. .
[0085]
According to such a configuration, it is not necessary to provide an exhaust member such as the exhaust duct 45, so that the cost can be reduced by reducing the number of parts and simplifying the installation work.
[0086]
Note that, because of the configuration in which the ventilation air is directly discharged into the ceiling space 83 as described above, the indoor unit X5 of this embodiment has the casing 1 as in the indoor unit X1 of the first embodiment. The air supply port 44 cannot be provided in the side plate 1B.
[0087]
F: Sixth embodiment
FIG. 16 shows an indoor unit X6 as a sixth embodiment of the air-conditioning apparatus according to the present invention. As with the indoor unit X5 according to the fifth embodiment, the indoor unit X6 is configured to exhaust the ventilation air blown out from the impeller 33 directly into the ceiling space 83. The structure of the impeller 33 is different from the indoor unit X5 of the fifth embodiment. That is, in the indoor unit X6 of this embodiment, the impeller 33 is constituted by an axial flow impeller, and a fan outlet 40a is provided on the top plate 40b of the fan housing 40 that accommodates the impeller 33. Ventilation air blown from the impeller 33 is blown upward into the ceiling back space 83.
[0088]
By adopting such a configuration, as in the case of the indoor unit X5 according to the fifth embodiment, there is no need to provide an exhaust member such as the exhaust duct 45, so that the number of parts is reduced and installation work is simplified accordingly. The cost can be reduced by making it easier.
[0089]
Note that, since the ventilation air is discharged into the ceiling space 83 as it is, the indoor unit X6 of this embodiment has the casing 1 as in the indoor unit X1 of the first embodiment. The air supply port 44 cannot be provided in the side plate 1B.
[0090]
G: Seventh embodiment
FIG. 17 shows an indoor unit X7 as a seventh embodiment of the air-conditioning apparatus according to the present invention. This indoor unit X7 is positioned as a modification of the indoor unit X1 according to the first embodiment, and its basic configuration is substantially the same as the air conditioner X1 according to the first embodiment. What is different from this is the structure of the impeller unit N constituting the ventilation mechanism N. Therefore, in the following, only the structure of the impeller unit N will be described in detail, and the other components and functions and effects will be referred to the corresponding description in the first embodiment, and the description here will be omitted. To do.
[0091]
In this embodiment, an opening 29a is formed in the partition plate 29 disposed on the top plate 1A of the casing 1, and one end 41a communicates with the opening 29a on the upper surface side of the partition plate 29 and the other end. Is provided with a ventilation passage 41 that opens laterally in the vicinity of the end face of the casing 1. An exhaust duct 45 disposed in the ceiling space 83 is connected to the other end 41 b of the ventilation path 41, and the impeller unit N is interposed in the middle of the passage of the exhaust duct 45. The impeller unit N accommodates an impeller 34 made of, for example, a multiblade fan or a propeller fan, which is rotationally driven by a motor (not shown), in a fan housing 35 that is interposed and connected in the middle of the passage of the exhaust duct 45. Configured.
[0092]
Therefore, when the impeller unit N is operated and the impeller 34 rotates, a part of the air in the casing 1 passes through the ventilation path 41 from the opening 29a as shown by the streamline A4. The air is sucked into the side 45 and further exhausted to the outside through the exhaust duct 45, thereby realizing indoor ventilation.
[0093]
Thus, the ventilation mechanism N is configured by the impeller unit N including the impeller 34, and the impeller unit N is disposed in the middle of the passage of the exhaust duct 45 that connects the air conditioner X7 and the outdoor. By arranging, for example, as compared with the case where the impeller unit N is arranged in the casing 1, simplification of the structure of the air conditioner X7 is promoted.
[Brief description of the drawings]
[0094]
FIG. 1 is a cross-sectional view of an air conditioner according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a view taken in the direction of arrows III-III in FIG.
4 is an enlarged view of a portion IV in FIG. 1. FIG.
5 is a view taken along arrow VV in FIG.
6 is an enlarged view of a portion IV in FIG. 1. FIG.
7 is an enlarged view of a portion IV in FIG. 1. FIG.
8 is a view taken along arrow VIII-VIII in FIG.
FIG. 9 is an explanatory diagram of changes in the state of air pressure and temperature in the vicinity of the facing space shown in FIG. 3;
FIG. 10 is a cross-sectional view of an air conditioner according to a second embodiment of the present invention.
FIG. 11 is a cross-sectional view of an air conditioner according to a third embodiment of the present invention.
12 is a view taken along arrow XII-XII in FIG.
FIG. 13 is a cross-sectional view of an air conditioner according to a fourth embodiment of the present invention.
14 is a view taken along arrow XIV-XIV in FIG. 13;
FIG. 15 is a cross-sectional view of an air conditioner according to a fifth embodiment of the present invention.
FIG. 16 is a cross-sectional view of an air conditioner according to a sixth embodiment of the present invention.
FIG. 17 is a cross-sectional view of an air conditioner according to a seventh embodiment of the present invention.
FIG. 18 is a cross-sectional view showing the structure of a conventional air conditioner.
FIG. 19 is a cross-sectional view showing the structure of a conventional air conditioner.
[Explanation of symbols]
[0095]
1 is a casing, 2 is an indoor panel, 3 is a suction port, 4 is an outlet, 5 is a grill, 6 is a filter, 7 is a drain pan, 11 and 12 are motors, 15 is a support plate, 21 is a heat exchanger, 30 is Suction port, 31 to 34 are impellers, 35 is a casing, 36 to 38 are blades, 41 is a ventilation path, 42 is a communication port, 43 is a space, 44 is an air supply port, 45 is an exhaust duct, and 51 is a centripetal blade , 52 is a centrifugal blade, 53 is an annular ridge, 54 and 55 are permanent magnets, 61 is an in-machine space, 62 is an inner space, 63 is an outer space, 65 is an opening, 66 is an opposing space, 67 is a return port, M is An impeller unit, N is an impeller unit (ventilation mechanism), P is a seal mechanism, and X1 to X7 are air conditioners.

Claims (2)

A casing (1) that is embedded in a suspended state or suspended from the ceiling (81) with the opened lower end surface facing downward, and is attached to the opening end of the casing (1) from the indoor side and at a position near the center thereof Has a substantially cylindrical or substantially conical cylindrical appearance in an interior space (61) surrounded by an interior panel (2) having a suction port (3) and a blower outlet (4) formed on the outer periphery. The heat exchanger (21) formed so as to have a form is accommodated such that the inner peripheral side of the heat exchanger (21) faces the inlet (3) and the outer peripheral side faces the outlet (4), While the heat exchanger (21) divides the in-machine space (61) into an inner space (62) corresponding to the suction port (3) and an outer space (63) corresponding to the air outlet (4),
A motor (11) mounted in the interior space (61) with its axis oriented vertically in the inner space (62), and a drain pan provided at the lower end of the heat exchanger (21) The inner space (62) extends between the inner space (62) and the outer space (63) through the lower surface of (7) and the upper surface of the indoor panel (2). An opening (65) that allows the suction port (3) to communicate with the heat exchanger (21) is formed in a portion corresponding to, and a support plate (15) that is rotationally driven by the motor (11) is disposed. With
A portion of the support plate (15) corresponding to the outer space (63) has a plurality of front edges (36a) having a predetermined inclination angle (α) with respect to the axial direction of the heat exchanger (21). Provided with an impeller (31) that is constituted by a mixed flow impeller or an axial impeller provided with a plurality of blades (36), (36),... And rotates on the outer peripheral side of the heat exchanger (21),
Further, the motor (11) is located above the motor (11), and is constituted by a centrifugal impeller, a mixed flow impeller, or an axial flow impeller housed in the fan housing (40) and substantially coaxial with the motor (11). The exhaust duct is arranged so that the air in the inner space (62) is directly driven through the ceiling space (83) or in the ceiling space (83) by being rotationally driven by the arranged motor (12). An air conditioner in which an impeller (33) that discharges outdoors via (45) is disposed. A casing (1) that is embedded in a suspended state or suspended from the ceiling (81) with the opened lower end surface facing downward, and is attached to the opening end of the casing (1) from the indoor side and at a position near the center thereof Has a substantially cylindrical or substantially conical cylindrical appearance in an interior space (61) surrounded by an interior panel (2) having a suction port (3) and a blower outlet (4) formed on the outer periphery. The heat exchanger (21) formed so as to have a form is accommodated such that the inner peripheral side of the heat exchanger (21) faces the inlet (3) and the outer peripheral side faces the outlet (4), While the heat exchanger (21) divides the in-machine space (61) into an inner space (62) corresponding to the suction port (3) and an outer space (63) corresponding to the air outlet (4),
7. A motor (11), which is mounted in the interior space (61) with the axis centered vertically in the inner space (62) and provided with rotating shafts 11a and 11b at both ends in the axial direction. The inner space (62) and the outer space (63) pass between the lower surface of the drain pan (7) provided at the lower end of the heat exchanger (21) and the upper surface of the indoor panel (2). An opening (65) for extending the suction port (3) to communicate with the heat exchanger (21) is formed at a portion corresponding to the inner space (62) and extending over the motor space ( And 11) a support plate (15) that is rotationally driven by one of the rotation shafts (11a).
A portion of the support plate (15) corresponding to the outer space (63) has a plurality of front edges (36a) having a predetermined inclination angle (α) with respect to the axial direction of the heat exchanger (21). Provided with an impeller (31) that is constituted by a mixed flow impeller or an axial impeller provided with a plurality of blades (36), (36),... And rotates on the outer peripheral side of the heat exchanger (21),
Further, the motor (11) is located above the motor (11) by a centrifugal impeller, a mixed flow impeller, or an axial flow impeller housed in the fan housing (40) and the other rotating shaft of the motor (11). The air in the inner space (62) is directly driven through the ceiling space (83) or the exhaust duct (45) disposed in the ceiling space (83) by being rotationally driven by (11b). An air conditioner characterized in that an impeller (33) that discharges to the outside is arranged.

Images