JP6137114B2 - Heat source unit of air conditioner - Google Patents

Description

  The present invention provides a heat source unit of an air conditioner, in particular, a heat exchanger having aluminum or aluminum alloy fins and flat tubes arranged in a rectangular parallelepiped steel casing along the side and back of the casing. In addition, the present invention relates to a heat source unit of an air conditioner supported from below on a bottom surface of a casing via a spacer.

  Conventionally, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2013-164233) and Patent Document 2 (Japanese Patent Laid-Open No. 2013-139918), a heat exchanger having fins and flat tubes made of aluminum or an aluminum alloy is known. There is a heat source unit of an air conditioner arranged in a rectangular parallelepiped steel casing so as to be along the side surface and the back surface of the casing. In the heat source unit of Patent Document 1, a heat exchanger is fixed to the side surface of the casing via an aluminum bracket and a resin bracket having a fixing surface along the side surface of the casing. Further, in the heat source unit of Patent Document 2, the heat exchanger is supported from below on the bottom surface of the casing via a spacer for preventing electrolytic corrosion.

  In the heat source unit of Patent Document 1, it is necessary to bring the front end of the portion along the side surface of the casing of the heat exchanger to the back side of the casing by the amount that secures the fixing surface along the side surface of the casing. It is difficult to secure the heat transfer area of the vessel. Further, in the heat source unit of Patent Document 2, the heat exchanger's own weight concentrates on the portion located on the spacer of the heat exchanger, and the fins that are in contact with the lower spacer of the heat exchanger are easily deformed.

  An object of the present invention is that a heat exchanger having fins and flat tubes made of aluminum or aluminum alloy is disposed in a rectangular parallelepiped steel casing so as to be along the side surface and the back surface of the casing, and via a spacer. In the heat source unit of the air conditioner supported from below on the bottom of the casing, it is easy to secure the heat transfer area and the weight of the heat exchanger is less likely to concentrate on the part located on the spacer of the heat exchanger There is to do.

The heat source unit of the air conditioner according to the first aspect includes a fin made of aluminum or aluminum alloy and a heat exchanger having a flat tube made of aluminum or aluminum alloy inserted into a notch formed in the fin . It arrange | positions in a rectangular parallelepiped steel casing so that the side and back surface of a casing may be followed, and it is supported from the downward direction on the bottom face of the casing via the spacer. And here, the front upper part of the part along the side surface of the casing of the heat exchanger is fixed to the front upper part of the casing through a fixing part having a fixing surface intersecting the side surface of the casing.

  Here, since the fixing surface of the fixing portion intersects the casing side surface and this fixing portion is fixed to the front surface of the casing, the fixing surface along the side surface of the casing of Patent Document 1 is fixed to the side surface of the casing. Compared to the case, the fixed surface can be prevented from extending to the front surface side of the casing, and the gap between the front surface of the casing and the front end portion of the portion along the side surface of the casing of the heat exchanger can be reduced. For this reason, the heat transfer area of the heat exchanger can be increased. In addition, by fixing the fixing portion to the upper front portion of the casing, it is possible to effectively obtain the action of pulling the heat exchanger toward the front side and upward of the casing. For this reason, the dead weight of a heat exchanger concentrates on the part located on the spacer of a heat exchanger, and can suppress the deformation | transformation of the fin which touches the spacer of the lower part of a heat exchanger.

  Thus, here, it is easy to ensure the heat transfer area, and it is possible to make it difficult for the weight of the heat exchanger to concentrate on the portion located on the spacer of the heat exchanger.

Here, a fan is further arranged in the casing so as to face the front surface of the casing, and a bell mouth is arranged on the front surface of the casing so as to face the fan. Here, the fixing portion is fixed at a position overlapping the bell mouth when the casing is viewed from above.

  Here, the fixing position of the fixing portion on the front upper portion of the casing is set to a position overlapping the bell mouth when the casing is viewed from above, so a fixing surface that intersects the side surface of the casing is also adopted. Regardless, it is possible to suppress an increase in the size of the casing in the left-right direction.

The heat source unit of the air conditioner according to the second aspect is the heat source unit of the air conditioner according to the first aspect, wherein the fixing part has a steel connection member having a fixed surface, the connection member, and the heat exchanger. And a resin bracket interposed therebetween.

  Here, since a fixing part having a structure in which a resin bracket is interposed between the steel connecting member and the aluminum or aluminum alloy heat exchanger is employed, the electric power between the connecting member and the heat exchanger is adopted. Eating can be suppressed.

The heat source unit of the air conditioner according to the third aspect is the heat source unit of the air conditioner according to the second aspect , wherein the connecting member has a windproof member extending from the upper end to the lower end of the heat exchanger.

  Here, since the connecting member has a windproof member, the connecting member can perform a windproof function at the front end of the heat exchanger.

The heat source unit of the air conditioner according to the fourth aspect is the heat source unit of the air conditioner according to the third aspect, wherein the connecting member has an attachment member having a fixed surface together with the windproof member. However, it is fixed to the upper part of the windbreak member by screws. In this case, the windproof member or the mounting member is formed with a rotation preventing portion that restricts the mounting member from rotating relative to the windproof member when screwing.

  If the connecting member is configured by fixing the mounting member having the fixing surface to the windproof member by screwing, the mounting member may be rotated with respect to the windproof member at the time of screwing. However, since the rotation prevention part is formed in the windproof member or the attachment member here, the operation | work which attaches an attachment member to a windbreak member and comprises a connection member can be performed smoothly.

The heat source unit of the air conditioner according to the fifth aspect is the heat source unit of the air conditioner according to the first aspect, wherein the fixing portion has an aluminum bracket made of aluminum or aluminum alloy having a fixed surface, and the front surface of the casing. And a resin bracket interposed between the upper part and the aluminum bracket.

  Here, since a fixing part having a structure in which a resin bracket is interposed between an aluminum bracket made of aluminum or an aluminum alloy and a front upper portion of a steel casing is employed, an aluminum bracket (that is, a heat exchanger) and Electric corrosion between the casing and the casing can be suppressed.

A heat source unit of an air conditioner according to a sixth aspect is the heat source unit of an air conditioner according to any of the first to fifth aspects, wherein the casing forms a top plate that forms the top surface of the casing, A peripheral plate that forms a front surface, a side surface, and a back surface, and a bottom plate that forms a bottom surface of the casing are provided, and a peripheral portion of the top plate is disposed so as to cover an upper edge portion of the peripheral plate. And here, the fixed part is fixed to the fixed part located at the upper edge of the peripheral plate in the upper front part of the casing by screws, and the fixed part protrudes toward the back side of the casing. Yes.

  Here, since the casing of the structure arrange | positioned so that the peripheral part of a top plate may cover the upper edge part of a surrounding board is employ | adopted, a fixing | fixed part is made into the to-be-fixed part located in the upper edge part of the surrounding board of a casing. If the configuration of fixing by screwing is further employed, the end of the screw may interfere with the peripheral portion of the top plate when the peripheral portion of the top plate is put on the upper edge portion of the peripheral plate. However, here, since the fixed portion protrudes toward the back side of the casing, interference between the end portion of the screw and the peripheral portion of the top plate can be prevented.

A heat source unit of an air conditioner according to a seventh aspect comprises a heat exchanger having fins made of aluminum or aluminum alloy and flat tubes made of aluminum or aluminum alloy. It arrange | positions along a side surface and a back surface, and is supported from the downward direction on the bottom face of a casing through the spacer. And here, the front upper part of the part along the side surface of the casing of the heat exchanger is fixed to the front upper part of the casing through a fixing part having a fixing surface intersecting the side surface of the casing.

  Here, since the fixing surface of the fixing portion intersects the casing side surface and this fixing portion is fixed to the front surface of the casing, the fixing surface along the side surface of the casing of Patent Document 1 is fixed to the side surface of the casing. Compared to the case, the fixed surface can be prevented from extending to the front surface side of the casing, and the gap between the front surface of the casing and the front end portion of the portion along the side surface of the casing of the heat exchanger can be reduced. For this reason, the heat transfer area of the heat exchanger can be increased. In addition, by fixing the fixing portion to the upper front portion of the casing, it is possible to effectively obtain the action of pulling the heat exchanger toward the front side and upward of the casing. For this reason, the dead weight of a heat exchanger concentrates on the part located on the spacer of a heat exchanger, and can suppress the deformation | transformation of the fin which touches the spacer of the lower part of a heat exchanger.

Thus, here, it is easy to ensure the heat transfer area, and it is possible to make it difficult for the weight of the heat exchanger to concentrate on the portion located on the spacer of the heat exchanger.

Here, the fixing portion includes a steel connecting member having a fixing surface, and a resin bracket interposed between the connecting member and the heat exchanger.

Here, since a fixing part having a structure in which a resin bracket is interposed between the steel connecting member and the aluminum or aluminum alloy heat exchanger is employed, the electric power between the connecting member and the heat exchanger is adopted. Eating can be suppressed.

Here, the connecting member has a windproof member extending from the upper end to the lower end of the heat exchanger.

Here, since the connecting member has a windproof member, the connecting member can perform a windproof function at the front end of the heat exchanger.

Further, here, the connecting member has an attachment member having a fixing surface together with the windproof member, and the attachment member is fixed to the upper portion of the windproof member by screwing. In this case, the windproof member or the mounting member is formed with a rotation preventing portion that restricts the mounting member from rotating relative to the windproof member when screwing.

If the connecting member is configured by fixing the mounting member having the fixing surface to the windproof member by screwing, the mounting member may be rotated with respect to the windproof member at the time of screwing. However, since the rotation prevention part is formed in the windproof member or the attachment member here, the operation | work which attaches an attachment member to a windbreak member and comprises a connection member can be performed smoothly.

  As described above, according to the present invention, the following effects can be obtained.

In the heat source unit of the air conditioner according to the first aspect, the heat transfer area can be easily secured, and the weight of the heat exchanger can be made difficult to concentrate on the portion located on the spacer of the heat exchanger. Moreover, although the fixed surface which cross | intersects the side surface of a casing is employ | adopted, it can suppress that the size of the left-right direction of a casing becomes large.

In the heat source unit of the air conditioner according to the second aspect , electrolytic corrosion between the connecting member and the heat exchanger can be suppressed.

In the heat source unit of the air conditioner according to the third aspect , the connecting member can perform a windproof function at the front end of the heat exchanger.

In the heat source unit of the air conditioning apparatus according to the fourth aspect , the operation of attaching the attachment member to the windproof member and configuring the connection member can be performed smoothly.

In the heat source unit of the air conditioner according to the fifth aspect , electrolytic corrosion between the aluminum bracket (that is, the heat exchanger) and the casing can be suppressed.

In the heat source unit of the air conditioner according to the sixth aspect , interference between the end portion of the screw and the peripheral portion of the top plate can be prevented.

In the heat source unit of the air conditioner according to the seventh aspect, the heat transfer area can be easily secured, and the weight of the heat exchanger can be made difficult to concentrate on the portion located on the spacer of the heat exchanger. Moreover, the electrolytic corrosion between a connection member and a heat exchanger can be suppressed. Moreover, a connection member can fulfill | perform the wind-proof function in the front-end part of a heat exchanger. Furthermore, the operation | work which attaches an attachment member to a wind-proof member and comprises a connection member can be performed smoothly.

It is a schematic block diagram of the air conditioning apparatus which employ | adopted the outdoor unit as a heat-source unit concerning one Embodiment of this invention. It is a perspective view which shows the external appearance of an outdoor unit. It is a top view which shows the state which removed the top plate of the outdoor unit. It is a perspective view which shows the state which removed the top plate, the front plate, and the side plate of the outdoor unit. It is a schematic perspective view of an outdoor heat exchanger. It is a partial expansion perspective view of an outdoor heat exchanger. FIG. 4 is a cross-sectional view taken along the line I-I in FIG. It is an expansion perspective view of the A section of FIG. It is an expansion perspective view of the B section and C section of FIG. FIG. 10 is an exploded perspective view of FIG. 9. It is a figure which shows the outdoor unit as a heat source unit concerning a modification, Comprising: It is a figure corresponding to FIG. It is a figure which shows the outdoor unit as a heat source unit concerning a modification, Comprising: It is a figure corresponding to FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a heat source unit of an air conditioner according to the present invention and modifications thereof will be described with reference to the drawings. Note that the specific configuration of the heat source unit according to the present invention is not limited to the following embodiments and modifications thereof, and can be changed without departing from the scope of the invention.

(1) Basic Configuration of Air Conditioner FIG. 1 is a schematic configuration diagram of an air conditioner 1 that employs an outdoor unit 2 as a heat source unit according to an embodiment of the present invention.

  The air conditioner 1 is a device capable of cooling and heating a room such as a building by performing a vapor compression refrigeration cycle. The air conditioner 1 is mainly configured by connecting an outdoor unit 2 and an indoor unit 4. Here, the outdoor unit 2 and the indoor unit 4 are connected via a liquid refrigerant communication tube 5 and a gas refrigerant communication tube 6. That is, the vapor compression refrigerant circuit 10 of the air conditioner 1 is configured by connecting the outdoor unit 2 and the indoor unit 4 via the refrigerant communication pipes 5 and 6.

<Indoor unit>
The indoor unit 4 is installed indoors and constitutes a part of the refrigerant circuit 10. The indoor unit 4 mainly has an indoor heat exchanger 41.

  The indoor heat exchanger 41 is a heat exchanger that functions as a refrigerant evaporator during cooling operation to cool indoor air, and functions as a refrigerant radiator during heating operation to heat indoor air. The liquid side of the indoor heat exchanger 41 is connected to the liquid refrigerant communication tube 5, and the gas side of the indoor heat exchanger 41 is connected to the gas refrigerant communication tube 6.

  The indoor unit 4 has an indoor fan 42 for supplying indoor air as supply air after sucking indoor air into the indoor unit 4 and exchanging heat with the refrigerant in the indoor heat exchanger 41. That is, the indoor unit 4 has an indoor fan 42 as a fan that supplies indoor air as a heating source or cooling source of the refrigerant flowing through the indoor heat exchanger 41 to the indoor heat exchanger 41. Here, as the indoor fan 42, a centrifugal fan or a multiblade fan driven by an indoor fan motor 42a is used.

<Outdoor unit>
The outdoor unit 2 as a heat source unit is installed outside and constitutes a part of the refrigerant circuit 10. The outdoor unit 2 mainly includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, a liquid side closing valve 25, and a gas side closing valve 26.

  The compressor 21 is a device that compresses the low-pressure refrigerant of the refrigeration cycle until it reaches a high pressure. The compressor 21 has a hermetically sealed structure in which a rotary type or scroll type positive displacement compression element (not shown) is rotationally driven by a compressor motor 21a. The compressor 21 has a suction pipe 31 connected to the suction side and a discharge pipe 32 connected to the discharge side. The suction pipe 31 is a refrigerant pipe that connects the suction side of the compressor 21 and the four-way switching valve 22. The discharge pipe 32 is a refrigerant pipe that connects the discharge side of the compressor 21 and the four-way switching valve 22.

  The four-way switching valve 22 is a switching valve for switching the direction of refrigerant flow in the refrigerant circuit 10. During the cooling operation, the four-way switching valve 22 causes the outdoor heat exchanger 23 to function as a radiator for the refrigerant compressed in the compressor 21 and the indoor heat exchanger 41 for the refrigerant that has radiated heat in the outdoor heat exchanger 23. Switch to the cooling cycle state to function as an evaporator. That is, in the cooling operation, the four-way switching valve 22 is connected between the discharge side of the compressor 21 (here, the discharge pipe 32) and the gas side of the outdoor heat exchanger 23 (here, the first gas refrigerant pipe 33). (See the solid line of the four-way selector valve 22 in FIG. 1). Moreover, the suction side (here, the suction pipe 31) of the compressor 21 and the gas refrigerant communication pipe 6 side (here, the second gas refrigerant pipe 34) are connected (solid line of the four-way switching valve 22 in FIG. 1). See). Further, the four-way switching valve 22 causes the outdoor heat exchanger 23 to function as an evaporator of the refrigerant that has radiated heat in the indoor heat exchanger 41 during the heating operation, and the indoor heat exchanger 41 is compressed in the compressor 21. Switching to a heating cycle state that functions as a refrigerant radiator. That is, in the heating operation, the four-way switching valve 22 is connected to the discharge side (here, the discharge pipe 32) of the compressor 21 and the gas refrigerant communication pipe 6 side (here, the second gas refrigerant pipe 34). (Refer to the broken line of the four-way switching valve 22 in FIG. 1). In addition, the suction side of the compressor 21 (here, the suction pipe 31) and the gas side of the outdoor heat exchanger 23 (here, the first gas refrigerant pipe 33) are connected (four-way switching valve 22 in FIG. 1). See the dashed line). Here, the first gas refrigerant pipe 33 is a refrigerant pipe connecting the four-way switching valve 22 and the gas side of the outdoor heat exchanger 23. The second gas refrigerant pipe 34 is a refrigerant pipe that connects the four-way switching valve 22 and the gas-side closing valve 26.

  The outdoor heat exchanger 23 is a heat exchanger that functions as a refrigerant radiator that uses outdoor air as a cooling source during cooling operation, and functions as a refrigerant evaporator that uses outdoor air as a heating source during heating operation. The outdoor heat exchanger 23 has a liquid side connected to the liquid refrigerant pipe 35 and a gas side connected to the first gas refrigerant pipe 33. The liquid refrigerant pipe 35 is a refrigerant pipe that connects the liquid side of the outdoor heat exchanger 23 and the liquid refrigerant communication pipe 5 side.

  The expansion valve 24 is a valve that decompresses the high-pressure refrigerant of the refrigeration cycle that has radiated heat in the outdoor heat exchanger 23 to the low pressure of the refrigeration cycle during the cooling operation. The expansion valve 24 is a valve that reduces the high-pressure refrigerant of the refrigeration cycle radiated in the indoor heat exchanger 41 to the low pressure of the refrigeration cycle during heating operation. The expansion valve 24 is provided in a portion of the liquid refrigerant pipe 35 near the liquid side closing valve 25. Here, an electric expansion valve is used as the expansion valve 24.

  The liquid side shutoff valve 25 and the gas side shutoff valve 26 are valves provided at connection ports with external devices and pipes (specifically, the liquid refrigerant communication pipe 5 and the gas refrigerant communication pipe 6). The liquid side closing valve 25 is provided at the end of the liquid refrigerant pipe 35. The gas side closing valve 26 is provided at the end of the second gas refrigerant pipe 34.

  The outdoor unit 2 has an outdoor fan 36 for sucking outdoor air into the outdoor unit 2 and exchanging heat with the refrigerant in the outdoor heat exchanger 23 and then discharging the air to the outside. That is, the outdoor unit 2 includes an outdoor fan 36 as a fan that supplies outdoor air as a cooling source or a heating source of the refrigerant flowing through the outdoor heat exchanger 23 to the outdoor heat exchanger 23. Here, as the outdoor fan 36, a propeller fan or the like driven by an outdoor fan motor 36a is used.

<Refrigerant communication pipe>
Refrigerant communication pipes 5 and 6 are refrigerant pipes that are constructed on site when the air conditioner 1 is installed at an installation place such as a building. Depending on the installation conditions, those having various lengths and pipe diameters are used.

(2) Basic operation | movement of an air conditioning apparatus Next, basic operation | movement of the air conditioning apparatus 1 is demonstrated using FIG. The air conditioner 1 can perform a cooling operation and a heating operation as basic operations.

<Cooling operation>
During the cooling operation, the four-way switching valve 22 is switched to the cooling cycle state (state indicated by the solid line in FIG. 1).

  In the refrigerant circuit 10, the low-pressure gas refrigerant in the refrigeration cycle is sucked into the compressor 21 and is compressed until it reaches the high pressure in the refrigeration cycle, and then discharged.

  The high-pressure gas refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 23 through the four-way switching valve 22.

  The high-pressure gas refrigerant sent to the outdoor heat exchanger 23 radiates heat by exchanging heat with outdoor air supplied as a cooling source by the outdoor fan 36 in the outdoor heat exchanger 23 that functions as a refrigerant radiator. Become a high-pressure liquid refrigerant.

  The high-pressure liquid refrigerant that has radiated heat in the outdoor heat exchanger 23 is sent to the expansion valve 24.

  The high-pressure liquid refrigerant sent to the expansion valve 24 is depressurized to the low pressure of the refrigeration cycle by the expansion valve 24 and becomes a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant decompressed by the expansion valve 24 is sent to the indoor heat exchanger 41 through the liquid-side closing valve 25 and the liquid refrigerant communication pipe 5.

  The low-pressure gas-liquid two-phase refrigerant sent to the indoor heat exchanger 41 evaporates by exchanging heat with indoor air supplied as a heating source by the indoor fan 42 in the indoor heat exchanger 41. As a result, the room air is cooled and then supplied to the room to cool the room.

  The low-pressure gas refrigerant evaporated in the indoor heat exchanger 41 is again sucked into the compressor 21 through the gas refrigerant communication pipe 6, the gas side closing valve 26 and the four-way switching valve 22.

<Heating operation>
During the heating operation, the four-way switching valve 22 is switched to the heating cycle state (the state indicated by the broken line in FIG. 1).

  In the refrigerant circuit 10, the low-pressure gas refrigerant in the refrigeration cycle is sucked into the compressor 21 and is compressed until it reaches the high pressure in the refrigeration cycle, and then discharged.

  The high-pressure gas refrigerant discharged from the compressor 21 is sent to the indoor heat exchanger 41 through the four-way switching valve 22, the gas side closing valve 26 and the gas refrigerant communication pipe 6.

  The high-pressure gas refrigerant sent to the indoor heat exchanger 41 radiates heat by exchanging heat with indoor air supplied as a cooling source by the indoor fan 42 in the indoor heat exchanger 41 to become a high-pressure liquid refrigerant. . Thereby, indoor air is heated, and indoor heating is performed by being supplied indoors after that.

  The high-pressure liquid refrigerant radiated by the indoor heat exchanger 41 is sent to the expansion valve 24 through the liquid refrigerant communication pipe 5 and the liquid-side closing valve 25.

  The high-pressure liquid refrigerant sent to the expansion valve 24 is depressurized to the low pressure of the refrigeration cycle by the expansion valve 24 and becomes a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant decompressed by the expansion valve 24 is sent to the outdoor heat exchanger 23.

  The low-pressure gas-liquid two-phase refrigerant sent to the outdoor heat exchanger 23 exchanges heat with the outdoor air supplied as a heating source by the outdoor fan 36 in the outdoor heat exchanger 23 that functions as a refrigerant evaporator. Go and evaporate into a low-pressure gas refrigerant.

  The low-pressure refrigerant evaporated in the outdoor heat exchanger 23 is again sucked into the compressor 21 through the four-way switching valve 22.

(3) Basic configuration of outdoor unit Next, the basic configuration of the outdoor unit 2 as a heat source unit will be described with reference to FIGS. Here, FIG. 2 is a perspective view showing an appearance of the outdoor unit 2. FIG. 3 is a plan view showing a state in which the top plate 57 of the outdoor unit 2 is removed. FIG. 4 is a perspective view showing a state in which the top plate 57, the front plates 55 and 56, and the side plates 53 and 54 of the outdoor unit 2 are removed. FIG. 5 is a schematic perspective view of the outdoor heat exchanger 23. FIG. 6 is a partially enlarged perspective view of the outdoor heat exchanger 23. 7 is a cross-sectional view taken along the line II in FIG. 3 (the vicinity of the spacer 52c and the bottom plate 52 is shown). In the following description, “upper”, “lower”, “left”, “right”, “vertical”, “front”, “side”, “back”, “top”, “bottom”, etc. Unless otherwise specified, the wording means a direction and a surface when the surface on the fan blowing grill 55c side is the front surface.

  The outdoor unit 2 has a structure (so-called trunk type structure) in which the inside of the unit casing 51 is partitioned into a blower chamber S1 and a machine chamber S2 by a partition plate 58 extending in the vertical direction. The outdoor unit 2 is configured to discharge air from the front surface of the unit casing 51 after sucking outdoor air into the inside from a part of the back surface and side surface of the unit casing 51. The outdoor unit 2 mainly includes a unit casing 51, a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, closing valves 25 and 26, and refrigerant pipes 31 to 35 connecting these devices. It has the apparatus and piping which comprise the refrigerant circuit 10 containing, the outdoor fan 36, and the motor 36a for outdoor fans. Here, an example in which the blower chamber S1 is formed near the left side surface of the unit casing 51 and the machine chamber S2 is formed near the right side surface of the unit casing 51 will be described, but the left and right sides may be reversed.

  The unit casing 51 is a substantially rectangular parallelepiped steel member, and mainly connects the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the expansion valve 24, the closing valves 25 and 26, and these devices. The apparatus and piping which comprise the refrigerant circuit 10 containing the refrigerant pipes 31-35, the outdoor fan 36, and the outdoor fan motor 36a are accommodated. The unit casing 51 includes a bottom plate 52 on which the devices and pipings 21 to 26, 31 to 35, the outdoor fan 36, and the like constituting the refrigerant circuit 10 are placed, a blower chamber side plate 53, a machine chamber side plate 54, It has a blower room side front plate 55, a machine room side front plate 56, a top plate 57, and two installation legs 59.

  The bottom plate 52 is a steel plate-like member that constitutes the bottom portion of the unit casing 51.

  The blower chamber side plate 53 is a steel plate-like member that forms the side surface portion (here, the left side surface portion) of the unit casing 51 near the blower chamber S1. The lower part of the blower chamber side plate 53 is fixed to the bottom plate 52, and here, the front end portion thereof is an integral member with the left end portion of the blower chamber side front plate 55. The blower chamber side plate 53 is formed with a side fan inlet 53 a for sucking outdoor air into the unit casing 51 from the side surface side of the unit casing 51 by the outdoor fan 36. The blower chamber side plate 53 may be a separate member from the blower chamber side front plate 55.

  The machine room side plate 54 is a steel plate constituting a part of a side surface portion (here, a right side surface portion) of the unit casing 51 near the machine room S2 and a back surface portion of the unit casing 51 near the machine room S2. It is a shaped member. The lower part of the machine room side plate 54 is fixed to the bottom plate 52. Outdoor air is passed into the unit casing 51 from the back side of the unit casing 51 by the outdoor fan 36 between the rear side end of the blower room side plate 53 and the end of the machine room side plate 54 on the blower chamber S1 side. A rear fan inlet 53b for inhalation is formed.

  The blower chamber side front plate 55 is a steel plate-like member that constitutes the front portion of the blower chamber S1 of the unit casing 51. The lower portion of the blower chamber side front plate 55 is fixed to the bottom plate 52, and here, the left side end portion is an integral member with the front end portion of the blower chamber side plate 53. The blower chamber side front plate 55 is provided with a fan outlet 55a for blowing the outdoor air sucked into the unit casing 51 by the outdoor fan 36 to the outside. A bell mouth 55b is arranged at a position facing the fan outlet 55a on the inner surface of the blower chamber side front plate 55. The bell mouth 55b is a bell-shaped part with an opening at the center, and is arranged so as to protrude from the inner surface of the blower chamber side front plate 55 to the back side, and faces the outdoor fan 36. A fan blow grill 55c that covers the fan blow outlet 55a is provided on the front side of the blower chamber side front plate 55. The blower chamber side front plate 55 may be a separate member from the blower chamber side plate 53.

  The machine room side front plate 56 is a steel plate-like member that constitutes a part of the front surface portion of the machine chamber S2 of the unit casing 51 and a part of the side surface portion of the machine chamber S2 of the unit casing 51. The machine room side front plate 56 has an end portion on the fan chamber S1 side fixed to an end portion on the machine room S2 side of the blower chamber side front plate 55, and an end portion on the back side on the front side of the machine room side plate 54. It is fixed to the end of the.

  The top plate 57 is a steel plate-like member that constitutes the top surface portion of the unit casing 51. The top plate 57 is fixed to the blower chamber side plate 53, the machine room side plate 54, and the blower chamber side front plate 55 that constitute the peripheral plates forming the front surface, the side surface, and the back surface of the unit casing 51. Specifically, the peripheral portion 57a of the top plate 57 is disposed so as to cover the upper edge portion 51a of the peripheral plate (here, the side plates 53 and 54 and the front plates 55 and 56). 57 is fixed to the blower chamber side plate 53, the machine chamber side plate 54, and the blower chamber side front plate 55. Here, the peripheral portion 57 a of the top plate 57 is a square ring-shaped portion extending vertically downward from the outer peripheral edge of the substantially horizontal surface forming the top surface of the top plate 57. Further, the upper edge portion 51a of the peripheral plate (here, the side plates 53 and 54 and the front plates 55 and 56) is the side plate 53 of the unit casing 51 in a state where the top plate 57 covers the peripheral plate. 54 and the front plates 55 and 56 are portions overlapping the peripheral portion 57 a of the top plate 57.

  The partition plate 58 is a steel plate-like member that is disposed on the bottom plate 52 and extends in the vertical direction. Here, the partition plate 58 divides the inside of the unit casing 51 into left and right to form a blower chamber S1 near the left side and a machine chamber S2 near the right side. The lower portion of the partition plate 58 is fixed to the bottom plate 52, the front end portion thereof is fixed to the blower chamber side front plate 55, and the rear end portion thereof is the side closer to the machine room S <b> 2 of the outdoor heat exchanger 23. It extends to the end.

  The installation leg 59 is a steel plate-like member extending in the front-rear direction of the unit casing 51. The installation leg 59 is a member fixed to the installation surface of the outdoor unit 2. Here, the outdoor unit 2 has two installation legs 59, one is arranged near the blower room S1, and the other is arranged near the machine room S2.

  The outdoor fan 36 is a propeller fan having a plurality of blades, and is disposed at a position on the front surface side of the outdoor heat exchanger 23 so as to face the front surface of the unit casing 51 in the blower chamber S1. Specifically, the outdoor fan 36 is arrange | positioned so that the bell mouth 55b arrange | positioned in the position facing the fan blower outlet 55a formed in the front surface of the unit casing 51 and the fan blower outlet 55a may be opposed. The outdoor fan motor 36a is disposed between the outdoor fan 36 and the outdoor heat exchanger 23 in the front-rear direction in the blower chamber S1. The outdoor fan motor 36 a is supported by a motor support base 36 b placed on the bottom plate 52. The outdoor fan 36 is pivotally supported by an outdoor fan motor 36a.

  The outdoor heat exchanger 23 is a heat exchanger panel having a substantially L shape in plan view, and is mounted on the bottom plate 52 so as to face the side surface (here, the left side surface) and the back surface of the unit casing 51 in the blower chamber S1. Is placed. Specifically, the outdoor heat exchanger 23 is an insertion fin type all-aluminum heat exchanger composed of a large number of heat transfer tubes 61 made of flat tubes and a large number of heat transfer fins 64 made of insertion fins. is there. The heat transfer tube 61 is made of aluminum or an aluminum alloy, and is a flat multi-hole tube having a flat surface 62 serving as a heat transfer surface and a large number of small internal flow paths 63 through which a refrigerant flows. A large number of heat transfer tubes 61 are arranged in a plurality of stages at intervals along the vertical direction with the flat surfaces 62 facing each other. Here, a large number of heat transfer tubes 61 are arranged in two rows along the outdoor air flow direction, and one end in the longitudinal direction (here, the right end) is the refrigerant flow divider 66, the inlet / outlet header 67, or the intermediate header 68. The other end in the longitudinal direction (here, the left front end) is connected to the connection header 69. Here, the refrigerant flow divider 66, the inlet / outlet header 67, the intermediate header 68, and the connection header 69 are vertically long members in which a refrigerant flow path is formed inside an aluminum or aluminum alloy. The heat transfer fins 64 are made of aluminum or an aluminum alloy, and a plurality of heat transfer fins 64 are arranged along the longitudinal direction of the heat transfer tube 63 with a space therebetween. Here, in correspondence with the heat transfer tubes 61 being arranged in two rows along the direction of outdoor air flow, the heat transfer fins 64 are also arranged in two rows along the direction of outdoor air flow. The heat transfer fin 64 has a large number of notches 65 into which the heat transfer tubes 61 are inserted. The notch 65 extends from the horizontal edge of the heat transfer fin 64 in the horizontal direction (here, the edge on the windward side with respect to the passage direction of the outdoor air) in the horizontal direction. And the outdoor heat exchanger 23 which consists of such an all-aluminum heat exchanger is mounted on the bottom plate 52 which forms the bottom face of the unit casing 51 as mentioned above. In order to prevent the occurrence of electrolytic corrosion with the bottom plate 52, it is placed on the bottom plate 52 via spacers 52 a, 52 b, 52 c made of an electrically insulating material such as rubber. Here, the spacer 52 a is a plate-like member disposed between the lower ends of the refrigerant flow distributor 66, the inlet / outlet header 67 and the intermediate header 68 and the portion on the right side of the back side of the bottom plate 52. The spacer 52 b is a plate-like member disposed between the lower end portion of the connection header 69 and the portion on the front side of the bottom plate 52 that is closer to the left side. The spacer 52c is a plate-like member disposed between the substantially L-shaped lower end portion of the outdoor heat exchanger 23 and the portion of the bottom plate 52 on the left side on the back side on the back side. Thus, the outdoor heat exchanger 23 is supported from below on the bottom surface of the unit casing 51 via the spacers 52a, 52b, and 52c. Here, the heat transfer tubes 61 and the heat transfer fins 64 are arranged in two rows along the outdoor air flow direction, but the present invention is not limited to this, and the heat transfer tubes 61 and the heat transfer fins are not limited thereto. 64 may be a configuration in which only one row is arranged, or may be a configuration in which three or more rows are arranged. At this time, the refrigerant flow distributor and header may be appropriately connected to the end portion in the longitudinal direction of the heat transfer tube 61 according to the arrangement of the heat transfer tubes 61 and the passage. Further, the positions where the spacers are disposed are not limited to the above three positions, and may be other places such as the vicinity of the middle in the longitudinal direction of the portion along the back surface of the unit casing 51 of the outdoor heat exchanger 23. May be arranged.

  Here, the compressor 21 is a vertical cylindrical hermetic compressor, and is placed on the bottom plate 52 in the machine room S2.

(4) Configuration for fixing the front end of the outdoor heat exchanger to the unit casing In the outdoor unit 2 (heat source unit) having the above basic configuration, for example, similarly to the heat source unit of Patent Document 1, a unit casing 51 is provided. When the outdoor heat exchanger 23 is fixed to the side surface of the unit casing 51 via an aluminum bracket and a resin bracket having a fixing surface along the side surface (here, the left side surface), a fixing surface along the side surface of the unit casing 51 is secured. Accordingly, it is necessary to bring the front end portion of the outdoor heat exchanger 23 along the side surface of the unit casing 51 to the rear side of the unit casing 51, so that it is difficult to secure the heat transfer area of the outdoor heat exchanger 23. . In the outdoor unit 2 having the above basic configuration, the outdoor heat exchanger 23 is supported from below on the bottom surface of the unit casing 51 via spacers 52a, 52b, and 52c for preventing electric corrosion. Heat transfer fins 64 that contact the spacers 52a, 52b, 52c at the bottom of the outdoor heat exchanger 23 due to the weight of the outdoor heat exchanger 23 being concentrated on the portions of the outdoor heat exchanger 23 located on the spacers 52a, 52b, 52c. Is easily deformed. In particular, in the outdoor heat exchanger 23 having a substantially L shape in plan view along the side surface (here, the left side surface) and the back surface of the unit casing 51, the center of gravity is in the vicinity of the lower end portion of the approximately L shape. The deformation of the heat transfer fin 64 in contact with the surface becomes remarkable.

  As described above, in the outdoor unit 2 having the above-described basic configuration, it is easy to secure a heat transfer area, and the weight of the outdoor heat exchanger 23 is set at a portion located on the spacers 52a, 52b, 52c of the outdoor heat exchanger 23. It is preferable to make it difficult to concentrate.

  Therefore, here, the front upper portion of the portion along the side surface (here, the left side surface) of the unit casing 51 of the outdoor heat exchanger 23 is interposed via a fixing portion 70 having a fixing surface 70 a that intersects the side surface of the unit casing 51. The unit casing 51 is fixed to the upper front. Hereinafter, the structure for fixing the front side edge part of such an outdoor heat exchanger 23 to the unit casing 51 is demonstrated using FIGS. 2-4 and FIGS. 7-10. Here, FIG. 8 is an enlarged perspective view of a portion A in FIG. FIG. 9 is an enlarged perspective view of portions B and C in FIG. FIG. 10 is an exploded perspective view of FIG. In the following description, “top”, “bottom”, “left”, “right”, “vertical”, “front”, “side”, “back”, “top”, “bottom”, etc. Unless otherwise specified, the wording means a direction and a surface when the surface on the fan blowing grill 55c side is the front surface.

  A portion along the side surface (here, the left side surface) of the outdoor heat exchanger 23 extends to the left side surface and the vicinity of the front surface of the unit casing 51, and a connection header 69 is disposed at the front end portion thereof. The fixing portion 70 is disposed at the front end portion of the outdoor heat exchanger 23 and is mainly interposed between the connecting member 71 made of steel having a fixing surface 70a and the connecting member 71 and the outdoor heat exchanger 23. And a resin bracket 72. Here, aluminum brackets 73 made of aluminum or aluminum alloy are fixed to the front upper part and front lower part of the connection header 69 by brazing or the like. For this reason, the resin bracket 72 is interposed between the connecting member 71 and the aluminum bracket 73 fixed to the outdoor heat exchanger 23.

  The aluminum bracket 73 is a member having an aluminum protruding portion 73 a that extends further to the right side than the right end portion of the connection header 69 along the front surface of the unit casing 51. That is, the aluminum protrusion 73 a extends in a direction intersecting the side surface of the unit casing 51. The aluminum protruding portion 73a is formed with an insertion hole 73b that penetrates the aluminum protruding portion 73a in the front-rear direction.

  The aluminum bracket 73 is provided with a resin bracket 72 made of resin that covers a portion extending to the right side of the right end portion of the connection header 69 from the outside. The resin bracket 72 is formed with an aluminum insertion portion 72a into which the aluminum bracket 73 can be inserted, and the aluminum protrusion 73a of the aluminum bracket 73 is inserted into the aluminum insertion portion 72a. The resin bracket 72 has an insertion hole 72b that penetrates the aluminum insertion portion 72a in the front-rear direction. The insertion hole 72b is disposed so as to correspond to the insertion hole 73b of the aluminum bracket 73 in a state where the aluminum protrusion 73a of the aluminum bracket 73 is inserted into the aluminum insertion part 72a. Further, the resin bracket 72 is formed with a steel insertion portion 72c into which a screwing plate 74 with a female screw hole 74a formed can be inserted on the back side of the aluminum insertion portion 72a. A plate 74 is inserted. The female screw hole 74a of the screwing plate 74 is disposed so as to correspond to the insertion holes 72b and 73b. Here, the hole size of the female screw hole 74a is set smaller than the hole sizes of the insertion holes 72b and 73b.

  The connecting member 71 mainly has a windproof member 75 extending from the upper end to the lower end of the outdoor heat exchanger 23. The windproof member 75 allows outdoor air sucked into the unit casing 51 from the side fan inlet 53a (see FIG. 3) to pass through the connection header 69 constituting the front end portion of the outdoor heat exchanger 23 and its surrounding space. This is a steel plate-like member for preventing the air volume passing through the heat transfer tubes 61 and the heat transfer fins 64 constituting the front end of the outdoor heat exchanger 23 from decreasing. The windbreak member 75 mainly has a first windbreak section 75a and a second windbreak section 75b. The first windproof portion 75 a is disposed on the leeward side (here, the right side) of the front end portion of the outdoor heat exchanger 23, and extends from the vicinity of the front end portion of the connection header 69 toward the back side of the unit casing 51. Part. The 1st wind-proof part 75a is arrange | positioned at intervals with the outdoor heat exchanger 23 so that it may not contact the outdoor heat exchanger 23 directly. On the left side surface of the first windproof portion 75a, a sealing material 76a for filling the gap at the connection portion between the connection header 69 and the heat transfer tube 61 is attached. The sealing material 76a is a member made of a foamable resin such as EPDM. The second windproof portion 75b is a portion extending from the front end portion of the first windproof portion 75a toward the left side along the front surface of the unit casing 51. A sealing material 76b for filling a gap between the connection header 69 and the front surface of the unit casing 51 is attached to the front surface of the second windproof portion 75b. The sealing material 76b is a member made of a foamable resin such as EPDM.

  The windproof member 75 is positioned along the front surface of the unit casing 51 at a vertical position corresponding to the aluminum bracket 73 fixed to the front upper portion and the front lower portion of the connection header 69 and the resin bracket 72 into which the aluminum bracket 73 is inserted. A first steel protrusion 75c extending further to the right side than the right end of the windproof portions 75a and 75b is formed. The 1st steel protrusion part 75c is arrange | positioned at the front side of the resin bracket 72 in which the aluminum bracket 73 and the screwing board 74 were inserted.

  And the wind-proof member 75 is being fixed to the aluminum bracket 73 by the screwing via the resin bracket 72 in the state in which the 1st steel protrusion part 75c was piled up on the front side of the resin bracket 72. Specifically, a first insertion hole 75d that penetrates the first steel protrusion 75c in the front-rear direction is formed in the first steel protrusion 75c. The first insertion hole 75d is superimposed on the front side of the resin bracket 72 so as to correspond to the insertion hole 72b of the resin bracket 72, the insertion hole 73b of the aluminum bracket 73, and the female screw hole 74a of the screwing plate 74. Has been placed. Then, by inserting the first steel fixing screw 77 from the first steel projecting portion 75 c side and screwing it into the female screw hole 74 a of the screw fastening plate 74, the wind-proof member 75 is inserted into the aluminum bracket 73 via the resin bracket 72. It is fixed with screws.

The connecting member 71 has an attachment member 78 having a fixing surface 70a together with the windproof member 75, and the attachment member 78 is fixed to the upper portion of the windproof member 75 by screws. Specifically, the second steel protrusion that extends further to the right side than the right end portion of the windproof portions 75a and 75b along the front surface of the unit casing 51 is formed on the portion above the first steel protruding portion 75c of the windproof member 75. A portion 75e is formed. A female screw hole 75f is formed in the second steel protrusion 75e. The attachment member 78 is a steel plate-like member that extends to the right along the front surface of the unit casing 51. The left-side portion of the mounting member 78 is arranged in a state of being overlapped with the front side of the second steel protrusion 75e, and the second steel part is inserted through an insertion hole 78a formed at a position corresponding to the female screw hole 75f. The fixing screw 79 is fixed to the windproof member 75 by screwing into the female screw hole 75f. Here, the attachment member 78 is formed with a rotation preventing portion 78b that restricts the attachment member 78 from rotating relative to the wind-proof member 75 when screwing. Here, the rotation prevention part 78b is a part which protrudes toward the back side from the lower end of the part superimposed on the 2nd steel protrusion part 75e of the attachment member 78. As shown in FIG. Further, the portion on the right side of the mounting member 78 forms a fixed surface 70a that intersects the side surface of the unit casing 51, and the mounting member 78 is positioned at the upper part of the front surface of the unit casing 51 at the position of the fixed surface 70a. It is fixed to the fixed part 51b by screws. Specifically, the attachment member 78 has a female screw hole 78c formed at the position of the fixed surface 70a. The mounting member 78 is disposed in a state where the fixing surface 70a is superimposed on the back side of the fixed portion 51b of the unit casing 51, and the steel is passed through the insertion hole 51c formed at a position corresponding to the female screw hole 78c. The third fixing screw 80 made of a screw is screwed into the female screw hole 78c to be fixed to the upper front portion of the unit casing 51. Here, the portion on the right side of the mounting member 78 extends to a position overlapping the bell mouth 55b when the unit casing 51 is viewed from above, whereby the fixing surface 70a and the fixed portion of the corresponding unit casing 51b are fixed. 51b is also arranged at a position overlapping the bell mouth 55b (see FIG. 3). Further, the fixed portion 51 b is located on the upper edge portion 51 a of the peripheral plate (here, the front portion of the blower chamber side front plate 55) in the upper part of the front surface of the unit casing 51, and on the back side of the unit casing 51. It has a shape protruding toward it (see FIG. 8).

(5) Features of the outdoor unit The outdoor unit 2 (heat source unit) of the present embodiment has the following features.

<A>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the fixing surface 70a of the fixing portion 70 intersects the side surface of the unit casing 51, and the fixing portion 70 is placed on the front surface of the unit casing 51. Since it fixes (refer FIG.3 and FIG.8), compared with the case where the fixing surface along the side surface of the casing of patent document 1 is fixed to the side surface of the casing, the fixing surface 70a extends to the front side of the unit casing 51. The gap between the front surface of the unit casing 51 and the front end portion of the outdoor casing 23 along the side surface (here, the left side surface) of the unit casing 51 can be reduced. For this reason, the heat transfer area of the outdoor heat exchanger 23 can be increased. Moreover, by fixing the fixing portion 70 to the upper part of the front surface of the unit casing 51 (see FIGS. 3 and 8), an action of pulling the outdoor heat exchanger 23 toward the front side and upward of the unit casing 51 is effectively obtained. be able to. For this reason, the weight of the outdoor heat exchanger 23 is concentrated on the portions of the outdoor heat exchanger 23 located on the spacers 52a, 52b, 52c, and the lower spacers 52a, 52b, 52c of the outdoor heat exchanger 23 (in particular, The deformation of the heat transfer fins 64 in contact with the spacer 52c) can be suppressed.

  As described above, the heat transfer area can be easily secured and the weight of the outdoor heat exchanger 23 can be made difficult to concentrate on the portions of the outdoor heat exchanger 23 located on the spacers 52a, 52b, and 52c. .

<B>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the fixing position of the fixing portion 70 on the front upper portion of the unit casing 51 overlaps with the bell mouth 55b when the unit casing 51 is viewed from above. (See FIG. 3). For this reason, although the fixed surface 70a which cross | intersects the side surface of the unit casing 51 is employ | adopted here, it can suppress that the size of the left-right direction of the unit casing 51 becomes large.

<C>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the resin bracket 72 is interposed between the steel connection member 71 and the aluminum or aluminum alloy outdoor heat exchanger 23. Part 70 is employed (see FIGS. 8 to 10). For this reason, the electrolytic corrosion between the connection member 71 and the outdoor heat exchanger 23 can be suppressed.

<D>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the connecting member 71 has the windproof member 75 extending from the upper end to the lower end of the outdoor heat exchanger 23 (see FIGS. 8 to 10). . For this reason, the connection member 71 can fulfill the windproof function at the front end of the outdoor heat exchanger 23.

<E>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the connecting member 71 has the attachment member 78 having the fixed surface 70a together with the windproof member 75, and the attachment member 78 is the windproof member 75. Is fixed by screwing (see FIGS. 8 to 10). As described above, when the connecting member 71 is configured by fixing the mounting member 78 having the fixing surface 70a to the windproof member 75 by screwing, the mounting member 78 may rotate with respect to the windproof member 75 at the time of screwing. is there.

  However, in the outdoor unit 2 (heat source unit) of the present embodiment, the anti-rotation portion 78b is formed on the attachment member 78 as described above (see FIG. 10). For this reason, the operation | work which attaches the attachment member 78 to the wind-proof member 75, and comprises the connection member 71 can be performed smoothly.

<F>
In the outdoor unit 2 (heat source unit) of the present embodiment, as described above, the unit casing 51 includes the top plate 57 that forms the top surface of the unit casing 51, and the periphery that forms the front surface, the side surface, and the back surface of the unit casing 51. It has a plate (here, side plates 53 and 54 and front plates 55 and 56) and a bottom plate 52 that forms the bottom surface of the unit casing 51, and the peripheral portion 57a of the top plate 57 is a peripheral plate (here. The fan chamber side front plate 55 is disposed so as to cover the upper edge portion 51a (see FIGS. 2 and 8).

  Here, if the structure which fixes the fixing | fixed part 70 to the to-be-fixed part 51b located in the upper edge part 51a of the unit casing 51 (here blower room side front board 55) by screwing further is adopted, When the peripheral portion 57a is put on the upper edge portion 51a (here, the blower chamber side front plate 55), the end portion of the screw (here, the head of the third fixing screw 80) is placed on the peripheral portion 57a of the top plate 57. There is a risk of interference.

  However, in the outdoor unit 2 (heat source unit) of the present embodiment, the fixed portion 51b protrudes toward the back side of the unit casing 51 as described above (see FIG. 8). For this reason, interference between the end portion of the screw (here, the head portion of the third fixing screw 80) and the peripheral portion 57a of the top plate 57 can be prevented.

(6) Modification <A>
In the outdoor unit 2 (heat source unit) according to the above-described embodiment, the attachment member 78 is provided with a rotation preventing portion 78b for restricting the attachment member 78 from rotating relative to the wind-proof member 75 at the time of screwing. However, the anti-rotation portion is not limited to the one formed on the attachment member 78. For example, as shown in FIG. 11, the anti-rotation portion 75 g may be formed in the windproof member 75. The anti-rotation portion 75g is a portion protruding from the lower end of the portion where the mounting member 78 of the second steel protruding portion 75e is overlapped toward the front side.

<B>
In the outdoor unit 2 (heat source unit) according to the above embodiment, the resin bracket 72 is interposed between the aluminum or aluminum alloy outdoor heat exchanger 23 and the steel connecting member 71 having the fixed surface 70a. However, the configuration of the fixing unit 70 is not limited to this. For example, as shown in FIG. 12, an aluminum bracket 83 made of aluminum or aluminum alloy and a unit casing are disposed above the resin bracket 72 and the aluminum bracket 73 for connecting the windproof member 75 and the outdoor heat exchanger 23. A resin bracket 82 interposed between the upper portion of the front surface of 51 and the aluminum bracket 83 may be provided, and the fixing portion 70 may be configured by these brackets 82 and 83. Here, the resin bracket 82 and the aluminum bracket 83 have the same configuration as the resin bracket 72 and the aluminum bracket 73 except that the resin bracket 82 and the aluminum bracket 83 extend to the right along the front surface of the unit casing 51. A protruding portion (not shown in FIG. 12) serves as a fixed surface 70a. As described above, even if the fixing portion 70 having the configuration in which the resin bracket 82 is interposed between the aluminum bracket 83 made of aluminum or aluminum alloy and the front upper portion of the steel unit casing 51 is employed, the aluminum bracket 83 (that is, The electric corrosion between the outdoor heat exchanger 23) and the unit casing 51 can be suppressed.

<C>
In the outdoor unit 2 (heat source unit) according to the above embodiment, as shown in FIGS. 6 and 7, an outdoor heat exchanger 23 using heat transfer fins 64 having a horizontal width wider than that of the heat transfer tubes 61 is employed. However, the present invention is not limited to this. For example, a heat transfer fin 64 having a horizontal width such that the horizontal end of the heat transfer tube 61 is flush with the horizontal end of the heat transfer fin 64 is used. It may be a thing. Further, the notch 65 of the heat transfer fin 64 is formed so as to be cut from the windward end toward the leeward side with respect to the outdoor air passing direction, but is not limited thereto. The notch 65 of the heat transfer fin 64 may be formed so as to be cut from the end on the leeward side toward the windward side with respect to the passage direction of the outdoor air.

<D>
In the outdoor unit 2 (heat source unit) according to the above embodiment, the unit casing 51 has a rectangular shape having an R-shaped corner portion in plan view, but is not limited thereto. In plan view, the corner portion may be an octagon with a chamfer. And the rectangular parallelepiped shape of the unit casing 51 includes those in which a corner portion in a plan view has an R shape or a chamfered shape.

<E>
In the outdoor unit 2 (heat source unit) according to the above embodiment, the fixing portion 70 is fixed to a portion of the upper portion of the front surface of the unit casing 51 that overlaps the bell mouth 55b when the unit casing 51 is viewed from above. However, the present invention is not limited to this. Here, the front upper portion of the unit casing 51 means a front portion at a height position of 2/3 or more from the lower end of the unit casing 51. And if the fixing | fixed part 70 is the front upper part of the unit casing 51, you may be fixing to parts other than the upper edge part 51a of the part which overlaps the bellmouth 55b, or the fan room front board 55 as a surrounding board. For example, the lower end portion of the top plate 57 may be extended downward, and the fixing portion 70 may be fixed to that portion.

<F>
In the outdoor unit 2 (heat source unit) according to the above embodiment, the appearance of the connection header 69 located at the left front end of the outdoor heat exchanger 23 is a quadrangular prism shape, but is not limited thereto, for example, The appearance may be cylindrical. Moreover, the heat exchanger structure which abbreviate | omitted the connection header 69 by making it the structure which folded the heat exchanger tube 61 back and forth may be sufficient.

<G>
In the outdoor unit 2 (heat source unit) according to the above embodiment, the aluminum bracket 73 is fixed to the left front end of the outdoor heat exchanger 23. However, the present invention is not limited to this. The aluminum bracket 73 may be omitted by fixing directly to the left front end of the exchanger 23.

  In the present invention, a heat exchanger having aluminum or aluminum alloy fins and a flat tube is disposed in a rectangular parallelepiped steel casing so as to be along the side surface and the back surface of the casing, and the casing is provided with a spacer. It can be widely applied to the heat source unit of the air conditioner supported on the bottom surface of the air conditioner from below.

2 Outdoor unit (heat source unit)
23 Outdoor heat exchanger (heat exchanger)
36 Outdoor fan (fan)
51 Unit casing (casing)
51a Upper edge part 51b Fixed part 52 Bottom plate 52a-52c Spacer 53 Blower room side board (surrounding board)
54 Machine room side plate (surrounding plate)
55 Blower room side front plate (surrounding plate)
55b Bellmouth 56 Machine room side front plate (surrounding plate)
57 Top plate 57a Peripheral portion 61 Heat transfer tube (flat tube)
64 Heat transfer fin (fin)
70 Fixing part 70a Fixing surface 71 Connecting member 72 Resin bracket 75 Windproof member 75g Non-rotating part 78 Mounting member 78b Non-rotating part 82 Resin bracket 83 Aluminum bracket

JP 2013-164233 A JP2013-139918A

Claims (7)

A heat exchanger (23) having an aluminum or aluminum alloy fin and an aluminum or aluminum alloy flat tube (61) inserted into a notch (65) formed in the fin is a rectangular parallelepiped steel. A heat source unit of an air conditioner which is disposed in a casing (51) made of aluminum and is supported from below on the bottom surface of the casing through spacers (52a to 52c) along the side surface and the back surface of the casing. In
Upper front part of a portion along a side surface of the casing of the heat exchanger, the fixing portion having a fixed surface which intersects the side surface of the casing (70a) through (70), is fixed to the upper front of the casing ,
In the casing, a fan (36) is further disposed so as to face the front surface of the casing,
A bell mouth (55b) is arranged on the front surface of the casing so as to face the fan,
The fixing portion is fixed at a position overlapping the bell mouth when the casing is viewed from above.
Heat source unit (2) of the air conditioner. The fixing portion (70) includes a steel connecting member (71) having the fixing surface (70a), a resin bracket (72) interposed between the connecting member and the heat exchanger (23), have,
The heat source unit (2) of the air conditioning apparatus according to claim 1 . The connecting member (71) has a windproof member (75) extending from the upper end to the lower end of the heat exchanger (23).
The heat source unit (2) of the air conditioning apparatus according to claim 2 . The connecting member (71) has an attachment member (78) having the fixing surface (70a) together with the windproof member (75),
The mounting member is fixed to the upper part of the windproof member by screwing,
The wind-proof member or the attachment member is formed with a detent portion (78b, 75g) that restricts the attachment member from rotating relative to the wind-proof member when the screw is fixed.
The heat source unit (2) of the air conditioning apparatus according to claim 3 . The fixing portion (70) includes an aluminum bracket (83) made of aluminum or aluminum alloy having the fixing surface (70a), and a resin bracket interposed between the front upper portion of the casing (51) and the aluminum bracket. (82)
The heat source unit (2) of the air conditioning apparatus according to claim 1 . The casing (51) includes a top plate (57) that forms the top surface of the casing, a peripheral plate (53, 54, 55, 56) that forms the front surface, side surface, and back surface of the casing, and the bottom surface of the casing. A bottom plate (52) forming
The peripheral edge portion (57a) of the top plate is arranged so as to cover the upper edge portion (51a) of the peripheral plate,
The fixed portion is fixed to the fixed portion (51b) located at the upper edge portion of the peripheral plate among the front upper portion of the casing by screwing,
The fixed portion protrudes toward the back side of the casing.
The heat source unit (2) of the air conditioning apparatus of any one of Claims 1-5 . A heat exchanger (23) having fins made of aluminum or aluminum alloy and a flat tube (61) made of aluminum or aluminum alloy is placed on the side and back of the casing in a rectangular steel casing (51). In the heat source unit of the air conditioner that is arranged along the line and supported from below on the bottom surface of the casing via the spacers (52a to 52c),
A front upper portion of a portion along the side surface of the casing of the heat exchanger is fixed to an upper front portion of the casing via a fixing portion (70) having a fixing surface (70a) intersecting the side surface of the casing. ,
The fixing portion (70) includes a steel connecting member (71) having the fixing surface (70a), a resin bracket (72) interposed between the connecting member and the heat exchanger (23), Have
The connection member (71) has a windproof member (75) extending from the upper end to the lower end of the heat exchanger (23),
The connecting member (71) has an attachment member (78) having the fixing surface (70a) together with the windproof member (75),
The mounting member is fixed to the upper part of the windproof member by screwing,
The wind-proof member or the attachment member is formed with a detent portion (78b, 75g) that restricts the attachment member from rotating relative to the wind-proof member when the screw is fixed.
Heat source unit (2) of the air conditioner.

Images