JP6131762B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner, particularly an air conditioner having a configuration in which an outdoor heat exchanger composed of an all-aluminum heat exchanger having an aluminum or aluminum alloy header extending in the vertical direction is provided in a casing. It relates to outdoor units.

  Conventionally, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2011-145029), an air having a configuration in which an outdoor heat exchanger composed of an all-aluminum heat exchanger having an aluminum header extending in the vertical direction is provided in a casing. There is an outdoor unit of the harmony device. In this outdoor unit, a positioning portion comprising a recess for positioning the lower end portion of the header of the outdoor heat exchanger is formed in the bottom frame of the steel casing, and the lower end portion of the header and the positioning portion of the bottom frame are A structure is adopted in which an electrolytic corrosion prevention body composed of a cap that wraps the lower end of the header is interposed therebetween. Thereby, in this outdoor unit, the outdoor heat exchanger can be positioned while preventing electrolytic corrosion of the aluminum header.

  By the way, in an outdoor unit, there exists a request | requirement of manufacturing an outdoor unit from which a capability differs by mounting the outdoor heat exchanger from which the size of a heat exchanger tube or a fin differs, using the casing of the same size as a bottom frame.

  In response to such demands, when adopting an all-aluminum heat exchanger having an aluminum or aluminum alloy header extending in the vertical direction as an outdoor heat exchanger, not only the size of the heat transfer tubes and fins, It is necessary to use a header having a different size.

  In this case, if the positioning structure of the header using the conventional electric corrosion prevention body is adopted as the positioning structure of the outdoor heat exchanger, a plurality of types of the electric corrosion prevention body as a position shift prevention member can be selected depending on the size of the header. It is necessary to prepare. Because, for example, an electrolytic corrosion prevention body that fits a header having a large planar size cannot position a header having a small planar size, and an electrolytic corrosion prevention body that fits a header having a small planar size has a large planar size. This is because positioning cannot be performed.

  Thus, in the outdoor unit of the air conditioner having a configuration in which the outdoor heat exchanger composed of an all-aluminum heat exchanger having an aluminum or aluminum alloy header extending in the vertical direction is provided in the casing, the position shift prevention member is provided. Cannot be shared by headers with different plane sizes. For this reason, there exists a possibility that the increase in the number of parts at the time of manufacture of an outdoor unit and the misassembly of an electrolytic corrosion prevention body may generate | occur | produce.

  An object of the present invention is to prevent misalignment in an outdoor unit of an air conditioner having a configuration in which an outdoor heat exchanger composed of an all-aluminum heat exchanger having an aluminum or aluminum alloy header extending in the vertical direction is provided in a casing. The purpose is to reduce the number of parts and prevent misassembly by allowing the members to be shared by headers having different plane sizes.

  The outdoor unit of the air conditioner according to the first aspect includes an outdoor heat exchanger, a casing, and a position shift prevention member. The outdoor heat exchanger includes an aluminum or aluminum alloy heat transfer tube arranged in a plurality of stages in the vertical direction, and an aluminum or aluminum alloy extending in the vertical direction and connected to the longitudinal ends of the plurality of heat transfer tubes. It consists of an all-aluminum heat exchanger with a made header. The casing has a bottom frame on which the outdoor heat exchanger is placed. The misalignment prevention member is disposed on the bottom frame, and when the lower end portion of the header has the first plane size, the misalignment prevention member positions the header on the bottom frame by surrounding the outer peripheral edge of the lower end portion of the header. 1 It is an electrically insulating member in which an outer peripheral side positioning portion is formed. Moreover, when the lower end portion of the header has a second plane size smaller than the first plane size, the misalignment prevention member positions the header on the bottom frame by surrounding the outer peripheral edge of the lower end portion of the header. The second outer peripheral positioning portion is further formed in a state of protruding outward from the first outer peripheral positioning portion in the plan view of the bottom frame.

  Here, as described above, the first and second outer peripheral side positioning portions surrounding the outer peripheral edge of the lower end portion of the header are formed so as to protrude from each other in plan view of the bottom frame. And even if it is any of the case where the header of an outdoor heat exchanger has the 1st plane size, and the case where the header has the 2nd plane size smaller than the 1st plane size, the outdoor heat exchanger is It can be positioned on the bottom frame of the casing.

  As a result, the misalignment prevention member can be shared by headers having different plane sizes, and the number of parts can be reduced and misassembly can be prevented.

  Further, at this time, since the second outer peripheral side positioning part can be formed at the same vertical position as the first outer peripheral side positioning part, the vertical length is changed for each header having a different plane size. Design changes can be eliminated.

  In addition, at this time, in the plan view of the bottom frame, the planar size of the misalignment prevention member can be reduced by forming the second outer peripheral side positioning portion so as to overlap the first outer peripheral positioning portion. Since it becomes possible, it can also contribute to cost reduction.

  The outdoor unit of the air conditioner according to the second aspect has an outdoor heat exchanger and a casing. The outdoor heat exchanger includes an aluminum or aluminum alloy heat transfer tube arranged in a plurality of stages in the vertical direction, and an aluminum or aluminum alloy extending in the vertical direction and connected to the longitudinal ends of the plurality of heat transfer tubes. It consists of an all-aluminum heat exchanger with a made header. The casing has a bottom frame on which the outdoor heat exchanger is placed. Here, the bottom part of the lower end part of the header is formed with a recessed part that is recessed upward. And when the lower end part of a header has the 1st plane size, the position gap prevention member which has electrical insulation in which the 1st inner circumference side positioning part which at least one part touches a dent part was formed on a bottom frame. Has been placed. In addition, when the lower end portion of the header has a second plane size smaller than the first plane size, the position shift preventing member has a second inner peripheral side positioning portion at least partially in contact with the recessed portion. In the plan view of the frame, it is further formed in a state of protruding outward from the first inner peripheral side positioning portion.

  Here, as described above, a concave portion is formed on the bottom surface of the lower end portion of the header, and the first and second inner peripheral side positioning portions that are in contact with the concave portion protrude outside each other in a plan view of the bottom frame. It is made to form in a state. And even if it is any of the case where the header of an outdoor heat exchanger has the 1st plane size, and the case where the header has the 2nd plane size smaller than the 1st plane size, the outdoor heat exchanger is It can be positioned on the bottom frame of the casing.

  As a result, the misalignment prevention member can be shared by headers having different plane sizes, and the number of parts can be reduced and misassembly can be prevented.

  At this time, since the second inner peripheral positioning portion can be formed at the same vertical position as the first inner peripheral positioning portion, the vertical length is changed for each header having a different plane size. Such a design change can be made unnecessary.

  In addition, at this time, in the plan view of the bottom frame, the planar size of the misalignment prevention member is reduced by forming a part of the second inner peripheral side positioning portion overlapping the first inner peripheral side positioning portion. Therefore, it is possible to contribute to cost reduction.

  The outdoor unit of the air conditioner according to the third aspect is the outdoor unit of the air conditioner according to the second aspect, wherein the first inner peripheral side positioning portion is outside the lower end portion of the header having the second planar size. In order to avoid the portion corresponding to the peripheral edge, the second inner peripheral side positioning portion is formed on the misalignment prevention member so as to avoid the portion corresponding to the outer peripheral edge of the lower end portion of the header having the first planar size. It is formed on the misalignment prevention member.

  Here, as described above, the first and second inner peripheral side positioning portions are formed so as to avoid the portion corresponding to the outer peripheral edge of the lower end portion of the header, so the header having the first planar size. Is arranged in the first inner peripheral side positioning portion, the second inner peripheral side positioning portion is prevented from interfering with the outer peripheral edge of the lower end portion of the header, and the header having the second planar size is arranged on the second inner peripheral side. When arrange | positioning at a positioning part, it can prevent a 1st inner peripheral side positioning part not interfering with the outer periphery of the lower end part of a header.

  The outdoor unit of the air conditioning apparatus concerning a 4th viewpoint is the outdoor unit of the air conditioning apparatus concerning a 2nd viewpoint, The lower end outer peripheral part which comprises the outer periphery of a header in the lower end part of a header, and a lower end outside A recessed portion that is recessed upward is formed on the inner peripheral side of the peripheral edge portion. And the 1st inner peripheral side positioning part is formed in a position gap prevention member so that the lower end outer peripheral part of the header which has the 2nd plane size may be avoided, and the 2nd inner peripheral side positioning part is the 1st plane The misalignment prevention member is formed so as to avoid the outer peripheral edge at the lower end of the header having a size.

  Here, as described above, the first and second inner peripheral side positioning portions are formed so as to avoid the lower outer peripheral edge portion constituting the outer peripheral edge of the lower end portion of the header. When the header having the first inner circumferential side positioning portion is disposed in the first inner circumferential side positioning portion, the second inner circumferential side positioning portion is prevented from interfering with the outer peripheral edge portion of the lower end of the header, and the header having the second planar size is When arrange | positioning in a peripheral side positioning part, it can prevent a 1st inner peripheral side positioning part not interfering with the lower end outer periphery part of a header.

  The outdoor unit of the air conditioner according to the fifth aspect is the outdoor unit of the air conditioner according to the first aspect, wherein the second outer peripheral side positioning unit is positioned when the header is positioned by the second outer peripheral side positioning unit. The misalignment prevention member is arranged so that the center position of the lower end portion of the header is closer to the outer peripheral edge of the bottom frame than the center position of the lower end portion of the header when the header is positioned by the first outer peripheral positioning portion. Is formed.

  The outdoor heat exchanger is disposed in the outdoor unit in a state where a predetermined distance is provided with respect to the air suction port formed on the side surface and the back surface of the casing in consideration of heat exchange performance and ventilation performance. At this time, when the size of the header is changed together with the heat transfer tubes constituting the outdoor heat exchanger, the plane of the header is maintained in order to maintain the distance between the outdoor heat exchanger and the suction port by a predetermined distance. It is necessary to arrange the first and second outer peripheral side positioning portions according to the size. And when a header has the 2nd plane size, compared with the case where a header has the 1st plane size, the size of a heat exchanger tube is also small with a header. For this reason, in this case, in order to make the distance between the outdoor heat exchanger and the suction port a predetermined distance, the header having the second plane size is replaced with the header having the first plane size. It is necessary to arrange at a position closer to the side and back of the casing.

  Therefore, here, as described above, the center position of the second outer peripheral side positioning portion for positioning the header having a small planar size is the center position of the first outer peripheral side positioning portion for positioning the header having a large planar size. It arrange | positions so that it may become a position nearer than the outer periphery of a bottom frame.

  As a result, not only can the misalignment prevention member be shared by headers with different plane sizes, but also the outdoor heat exchanger having headers with different plane sizes can be used in consideration of heat exchange performance and ventilation performance. It can be positioned at the appropriate position above.

  The outdoor unit of the air conditioner according to the sixth aspect is the outdoor unit of the air conditioner according to any of the second to fourth aspects, wherein the second inner peripheral positioning portion has a header on the second inner peripheral side. The center position of the lower end portion of the header when positioned by the positioning portion is closer to the outer peripheral edge of the bottom frame than the center position of the lower end portion of the header when the header is positioned by the first inner peripheral positioning portion. Thus, it is formed on the misalignment prevention member.

  The outdoor heat exchanger is disposed in the outdoor unit in a state where a predetermined distance is provided with respect to the air suction port formed on the side surface and the back surface of the casing in consideration of heat exchange performance and ventilation performance. At this time, when the size of the header is changed together with the heat transfer tubes constituting the outdoor heat exchanger, the plane of the header is maintained in order to maintain the distance between the outdoor heat exchanger and the suction port by a predetermined distance. It is necessary to arrange the first and second inner peripheral positioning portions according to the size. And when a header has the 2nd plane size, compared with the case where a header has the 1st plane size, the size of a heat exchanger tube is also small with a header. For this reason, in this case, in order to make the distance between the outdoor heat exchanger and the suction port a predetermined distance, the header having the second plane size is replaced with the header having the first plane size. It is necessary to arrange at a position closer to the side and back of the casing.

  Therefore, here, as described above, the center position of the second inner peripheral side positioning portion for positioning the header having a small plane size is set to the center position of the first inner peripheral side positioning portion for positioning the header having a large plane size. It arrange | positions so that it may become a position near the outer periphery of a bottom frame rather than a center position.

  As a result, not only can the misalignment prevention member be shared by headers with different plane sizes, but also the outdoor heat exchanger having headers with different plane sizes can be used in consideration of heat exchange performance and ventilation performance. It can be positioned at the appropriate position above.

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

  In the outdoor unit of the air conditioner according to the first and second aspects, the misalignment prevention member can be shared by headers having different plane sizes, and the number of parts can be reduced and misassembly can be prevented.

  In the outdoor unit of the air conditioner according to the third and fourth aspects, when the header having the first planar size is arranged in the first inner peripheral positioning portion, the second inner peripheral positioning portion is the header When the header having the second planar size is arranged in the second inner peripheral positioning portion so as not to interfere with the outer peripheral edge (lower end outer peripheral portion) of the lower end, the first inner peripheral positioning portion is It is possible to prevent interference with the outer peripheral edge of the lower end part (lower end outer peripheral part).

  In the outdoor unit of the air conditioner according to the fifth and sixth aspects, not only can the position shift prevention member be shared by headers with different plane sizes, but also the outdoor heat exchanger having headers with different plane sizes can be used for heat exchange performance and In consideration of the ventilation performance, it can be positioned at an appropriate position on the bottom frame of the casing.

It is a schematic block diagram of the air conditioning apparatus by which the outdoor unit concerning one Embodiment of this invention was employ | adopted. It is a perspective view which shows the external appearance of an outdoor unit. It is a perspective view which shows the state which removed the air blower room side board, the air blower room side front board, and the top plate of the outdoor unit. It is a top view which shows the state which removed the top plate of the outdoor unit. It is a schematic perspective view of an outdoor heat exchanger (shown in a straight line in plan view). It is a schematic longitudinal cross-sectional view of an outdoor heat exchanger. It is a schematic perspective view of another outdoor heat exchanger (shown in a straight line shape in plan view). FIG. 5 is an enlarged view of a part A in FIG. 4, and is a plan view showing a state in which a header receiving member is arranged on the bottom frame. It is I-O1-O2-I sectional drawing (only a header receiving member is shown in figure) of FIG. FIG. 5 is an enlarged view of a part A in FIG. 4, showing a state in which a header having a first planar size is positioned by a header receiving member. It is I-O1-O2-I sectional drawing of FIG. 10 (only the header which has a header receiving member and a 1st plane size is shown in figure). FIG. 5 is an enlarged view of a part A in FIG. 4, illustrating a state in which a header having a second planar size is positioned by a header receiving member. FIG. 13 is a cross-sectional view taken along the line I-O1-O2-I of FIG. 12 (only a header receiving member and a header having a second planar size are shown). It is an enlarged view of the A section of Drawing 4 concerning modification A, and is a top view showing the state where the header receiving member has been arranged on the bottom frame. 14 is a cross-sectional view taken along the line I-O1-O2-I of FIG. 14 according to Modification A (only the header receiving member is shown). FIG. 9 is an enlarged view of a portion A in FIG. 4 according to Modification B (when only the first and second outer peripheral side positioning portions are formed), and is a plan view showing a state in which the header receiving member is disposed on the bottom frame. is there. FIG. 9 is an enlarged view of a portion A in FIG. 4 according to Modification B (when only the first and second inner peripheral side positioning portions are formed), and is a plan view showing a state in which the header receiving member is disposed on the bottom frame. It is.

  Hereinafter, embodiments of an outdoor unit of an air conditioner according to the present invention will be described with reference to the drawings. In addition, the specific structure of the outdoor unit of the air conditioning apparatus according to the present invention is not limited to the following embodiment and its modifications, and can be changed without departing from the scope of the invention.

(1) Overall Configuration of Air Conditioner FIG. 1 is a schematic configuration diagram of an air conditioner 1 in which an outdoor unit 2 according to an embodiment of the present invention is employed.

  The air conditioning apparatus 1 is an apparatus used for air conditioning indoors such as buildings by performing a vapor compression refrigeration cycle operation. 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 is provided with an indoor fan 42 for sending indoor air to the indoor heat exchanger 41. The indoor fan 42 is driven by an indoor fan motor 43.

<Outdoor unit>
The outdoor unit 2 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 26, a liquid side closing valve 26, and a gas side closing valve 27. The suction port of the compressor 21 and the four-way switching valve 22 are connected by a suction pipe 31. The discharge port of the compressor 21 and the four-way switching valve 22 are connected by a discharge pipe 32. The four-way switching valve 22 and the gas side of the outdoor heat exchanger 23 are connected by a first gas refrigerant pipe 33. The liquid side of the outdoor heat exchanger 23 and the liquid refrigerant communication tube 5 are connected to a liquid refrigerant tube 35. The expansion valve 26 is provided in the liquid refrigerant pipe 35. The four-way switching valve 22 and the gas refrigerant communication pipe 6 are connected by a second gas refrigerant pipe 34.

  The compressor 21 is a compressor that sucks low-pressure gas refrigerant in the refrigeration cycle from the suction pipe 31, compresses it into high-pressure gas refrigerant in the refrigeration cycle, and discharges it to the discharge pipe 32.

  The four-way switching valve 22 is a valve for switching the direction of the refrigerant flow in the refrigerant circuit 10 when switching between the cooling operation and the heating operation. During the cooling operation, the four-way switching valve 22 connects the discharge pipe 32 and the first gas refrigerant pipe 33 and connects the suction pipe 31 and the second gas refrigerant pipe 34 as shown by the solid line in FIG. During the heating operation, as shown by the broken line in FIG. 1, the discharge pipe 32 and the second gas refrigerant pipe 34 are connected, and the suction pipe 31 and the first gas refrigerant pipe 33 are connected.

  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. Here, as will be described later, as the outdoor heat exchanger 23, aluminum or aluminum alloy heat transfer tubes arranged in a plurality of stages in the vertical direction, and the longitudinal direction of the plurality of heat transfer tubes extending in the vertical direction are used. All-aluminum heat exchangers having an aluminum or aluminum alloy header connected to the end are used.

  The expansion valve 26 decompresses the refrigerant radiated in the outdoor heat exchanger 23 during the cooling operation before sending it to the indoor heat exchanger 41, and sends the refrigerant radiated in the indoor heat exchanger 41 to the outdoor heat exchanger 23 during the heating operation. It is an electric expansion valve that decompresses before.

  The liquid side shut-off valve 27 and the gas side shut-off valve 28 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 27 is provided at the end of the liquid refrigerant pipe 35. The gas side closing valve 28 is provided at the end of the second gas refrigerant pipe 34.

  The outdoor unit 2 is provided with an outdoor fan 36 for sending outdoor air to the outdoor heat exchanger 23. The outdoor fan 36 is driven by an outdoor fan motor 37.

(2) Structure of outdoor unit Next, the structure of the outdoor unit 2 of this embodiment is demonstrated using FIGS. Here, FIG. 2 is a perspective view showing an appearance of the outdoor unit 2. FIG. 3 is a perspective view showing a state where the blower chamber side plate 53, the blower chamber side front plate 55, and the top plate 57 of the outdoor unit 2 are removed. FIG. 4 is a plan view showing a state where the top plate 57 of the outdoor unit 2 is removed. FIG. 5 is a schematic perspective view of the outdoor heat exchanger 23 (shown as a straight line in plan view). FIG. 6 is a schematic longitudinal sectional view of the outdoor heat exchanger 23. FIG. 7 is a schematic perspective view of another outdoor heat exchanger 23 (shown as a straight line in plan view). FIG. 8 is an enlarged view of a portion A in FIG. 4, and is a plan view showing a state in which the header receiving member 70 is disposed on the bottom frame 52. 9 is a cross-sectional view taken along the line I-O1-O2-I of FIG. FIG. 10 is an enlarged view of a portion A in FIG. 4, and is a plan view showing a state where the header 233 having the first plane size P <b> 1 is positioned by the header receiving member 70. 11 is a cross-sectional view taken along the line I-O1-O2-I of FIG. 10 (only the header receiving member 70 and the header 233 having the first plane size P1 are shown). FIG. 12 is an enlarged view of a portion A in FIG. 4, and is a plan view showing a state where the header 233 having the second plane size P <b> 2 is positioned by the header receiving member 70. 13 is a cross-sectional view taken along the line I-O1-O2-I of FIG. 12 (only the header receiving member 70 and the header 233 having the second plane size P2 are shown). In the following explanation, directions and surfaces such as “top”, “bottom”, “left”, “right”, “front”, “side”, “back”, “top”, “bottom” are shown. The wording means a direction and a surface when the surface on the fan blowing grill 55b side is a front surface unless otherwise specified.

<Basic structure>
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 26, closing valves 27 and 28, and refrigerant pipes 31 to 31 connecting these devices. 35, a refrigerant circuit component (see FIG. 1) including an outdoor fan 36 and an outdoor fan motor 37. 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 formed in a substantially rectangular parallelepiped shape, and mainly connects the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the expansion valve 26, the closing valves 27 and 28, and these devices. The refrigerant circuit components including the refrigerant pipes 31 to 35, the outdoor fan 36, and the outdoor fan motor 37 are accommodated. The unit casing 51 includes a bottom frame 52 on which various components such as refrigerant circuit components and outdoor fans 36 are placed, a fan chamber side plate 53, a machine chamber side plate 54, a fan chamber side front plate 55, a machine A room-side front plate 56, a top plate 57, and installation legs 59 and 60 are provided.

  The bottom frame 52 is a steel plate-like member that constitutes the bottom surface portion of the unit casing 51. The bottom frame 52 includes a bottom frame plane portion 52a that is substantially parallel to the horizontal plane, and bottom frame rising portions 52b to 52e that rise substantially vertically from the outer periphery of the bottom frame plane portion 52a. Here, a bottom frame rising portion that rises substantially vertically from the front portion of the bottom frame flat surface portion 52a is defined as a bottom frame front rising portion 52b. Further, a bottom frame rising portion that rises substantially vertically from the rear portion of the bottom frame flat surface portion 52a is defined as a bottom frame rear rising portion 52c. Further, a bottom frame rising portion that rises substantially vertically from the left and right sides of the bottom frame flat surface portion 52a is defined as a bottom frame left rising portion 52d and a bottom frame right rising portion 52e (not shown). Further, as shown in FIG. 3, a complicated uneven shape is formed on the bottom frame plane portion 52a (not shown in FIG. 4).

  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 frame 52. 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 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 frame 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 frame 52, and the left end portion thereof is fixed to 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. On the front side of the blower chamber side front plate 55, a fan blow grill 55b that covers the fan blow outlet 55a is provided.

  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.

  The partition plate 58 is a steel plate-like member that is disposed on the bottom frame 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 part of the partition plate 58 is fixed to the bottom frame 52, the end on the front side thereof is fixed to the front plate 55 on the blower room side, and the end on the back side is closer to the machine room S <b> 2 of the outdoor heat exchanger 23. It extends to the side edge.

  The installation legs 59 and 60 are steel plate-like members extending in the front-rear direction of the unit casing 51. The installation legs 59 and 60 are members fixed to the installation surface of the outdoor unit 2. Here, the outdoor unit 2 has two installation legs 59 and 60, one is the blower room side installation leg 59 arranged near the blower room S1, and the other is the machine room S2. It is the machine room side installation leg 60 arrange | positioned near.

  The outdoor fan 36 is a propeller fan having a plurality of blades, and faces the front surface of the unit casing 51 (here, the fan air outlet 55a) at a position on the front surface side of the outdoor heat exchanger 23 in the blower chamber S1. Are arranged as follows. The outdoor fan motor 37 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 37 is supported by a motor support base 61 placed on the bottom frame 52. The outdoor fan 36 is pivotally supported by an outdoor fan motor 37.

  The outdoor heat exchanger 23 is a heat exchanger panel having a substantially L shape in plan view (shown in a straight line shape in plan view in FIGS. 5 and 7), and in the blower chamber S <b> 1, the unit casing 51. It is placed on the bottom frame 52 so as to face the side surface (here, the left side surface) and the back surface. Specifically, as shown in FIGS. 5 and 6, the outdoor heat exchanger 23 is mainly composed of a heat transfer tube 231 formed of a flat multi-hole tube and a heat transfer fin 232 formed of a large number of insertion fins. This is an all-aluminum heat exchanger of the insertion fin type. The heat transfer tube 231 formed of a flat multi-hole tube is formed of aluminum or an aluminum alloy as described above, and has upper and lower flat portions serving as heat transfer surfaces and a large number of small refrigerant flow paths 231a through which the refrigerant flows. ing. The heat transfer tubes 231 are arranged in a plurality of stages in the vertical direction at intervals with the plane portion facing up and down, and both ends in the longitudinal direction are connected to the headers 233 and 234. The headers 233 and 234 are hollow cylindrical members made of aluminum or aluminum alloy that extend in the vertical direction, and have a function of branching or joining the refrigerant flowing through the heat transfer tubes 231. The heat transfer fins 232 are aluminum or aluminum alloy fins and are in contact with the heat transfer tubes 231. The heat transfer fins 232 are formed with a plurality of notches 232a extending horizontally so that the heat transfer fins 232 can be inserted into the heat transfer tubes 231 arranged between the headers 233 and 234. Yes. The shape of the notch 232 a of these heat transfer fins 232 substantially matches the outer shape of the cross section of the heat transfer tube 231. The headers 233 and 234 have a function of supporting the heat transfer tube 231, a function of guiding the refrigerant to the refrigerant flow path 231 a of the heat transfer pipe 231, and a function of collecting the refrigerant that has come out of the refrigerant flow path 231 a. In addition to the heat transfer tube 231, a second gas refrigerant tube 33 and a liquid refrigerant tube 35 (not shown in FIG. 5) are connected to these headers 233 and 234. The outdoor heat exchanger 23 is not limited to a plug-in type stacked heat exchanger. For example, as shown in FIG. 7, a plurality of heat transfer tubes 231 formed of a flat multi-hole tube and a large number of heat transfer tubes 231 are used. It may be a corrugated fin type all-aluminum heat exchanger composed of heat transfer fins 235 made of corrugated fins. Here, the heat transfer fins 235 are fins made of aluminum or aluminum alloy bent into a corrugated shape. The heat transfer fins 235 are disposed in a ventilation space sandwiched between the heat transfer tubes 231 adjacent in the vertical direction, and the valley portions and the mountain portions thereof are in contact with the flat portion of the heat transfer tubes 231.

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

  As described above, the outdoor unit 2 is connected to the heat transfer tubes 231 made of aluminum or aluminum alloy arranged in a plurality of stages in the vertical direction, and the longitudinal ends of the heat transfer tubes 231 extending in the vertical direction. An outdoor heat exchanger 23 comprising an all-aluminum heat exchanger having headers 233 and 234 made of aluminum or aluminum alloy is mounted on a bottom frame 52 of a unit casing 51 made of non-aluminum metal (here, steel). Is placed. In the outdoor unit 2, as will be described later, the outdoor heat exchanger 23 made of an all-aluminum heat exchanger prevents the electrolytic corrosion of the headers 233 and 234 by the positioning structure by the header receiving member 70 as a displacement prevention member. However, it is positioned on the bottom frame 52 of the unit casing 51.

<Positioning structure of outdoor heat exchanger>
In the outdoor unit 2 having the above basic structure, as shown in FIG. 4, the lower end portions 233a and 234a of the headers 233 and 234 constituting the outdoor heat exchanger 23 made of an all-aluminum heat exchanger and the bottom frame 52 (specifically The rubber header receiving members 70 and 80 are arranged between the bottom frame flat surface portion 52a) in the vertical direction. Further, a heat exchange member 90 made of rubber is also disposed between the lower end portion of the L-shaped corner portion of the outdoor heat exchanger 23 and the bottom frame 52 (specifically, the bottom frame plane portion 52a). Has been. Here, the header receiving member 70 is a plate-like member disposed between the lower end portion 233a of the header 233 and the portion on the back side of the bottom frame flat surface portion 52a on the right side in the vertical direction. The header receiving member 80 is a plate-like member disposed between the lower end portion 234a of the header 234 and the front left side portion of the bottom frame plane portion 52a. The header receiving members 70 and 80 are fixed to the bottom frame 52. The heat exchange member 90 is a plate-like member disposed between the lower end portion of the L-shaped corner portion of the outdoor heat exchanger 23 and the portion on the back side of the bottom frame plane portion 52a on the left side.

  This prevents the headers 233, 234 made of aluminum or aluminum alloy from coming into direct contact with the steel bottom frame 52, and prevents electrolytic corrosion of the headers 233, 234, etc.

  Here, the header receiving members 70 and 80 and the corner receiving member 90 are made of rubber. However, any material having electrical insulation may be used, so other polymer materials such as resin may be used. Non-metallic inorganic materials such as ceramics may be used. Further, the heat exchange member 90 is not limited to the one disposed at the L-shaped corner portion of the outdoor heat exchanger 23, and is disposed at another portion such as a straight portion of the outdoor heat exchanger 23. It may be.

  In such a configuration having the header receiving members 70, 80, the header receiving member 70 that receives the lower end portion 233 a of the header 233 is used to position the outdoor heat exchanger 23 at a predetermined position on the bottom frame 52 of the unit casing 51. It is conceivable to provide a structure for positioning the header 233.

  Here, in the outdoor unit, the outdoor unit 2 having different capacities by mounting the outdoor heat exchangers 23 having different sizes of the heat transfer tubes 231 and the fins 232 and 235 while adopting a unit casing having the same size as the bottom frame 52. There is a demand to manufacture.

  In response to this requirement, when an all-aluminum heat exchanger such as the outdoor heat exchanger 23 is adopted, not only the sizes of the heat transfer tubes 231 and the fins 232 and 235 but also the sizes of the headers 233 and 234 are different. It is necessary to use something.

  In this case, if a header positioning structure using an electric corrosion prevention body as in the prior art (Patent Document 1) is adopted as the positioning structure of the outdoor heat exchanger 23, the electric corrosion prevention body as a misalignment prevention member is used as the header. Depending on the size, it is necessary to prepare a plurality of types. Because, for example, an electrolytic corrosion prevention body that fits a header having a large planar size cannot position a header having a small planar size, and an electrolytic corrosion prevention body that fits a header having a small planar size has a large planar size. This is because positioning cannot be performed. Thus, in the header positioning structure using the electric corrosion prevention body as in the prior art (Patent Document 1), the electric corrosion prevention body as a displacement prevention member cannot be shared by headers having different plane sizes, There is a possibility that an increase in the number of parts and an erroneous assembly of the electrolytic corrosion prevention body may occur during the manufacture of the outdoor unit.

  Therefore, here, the header receiving member 70 serving as a misalignment prevention member, the first outer peripheral side positioning portion 71 used for positioning when the lower end portion 233a of the header 233 has the first plane size P1, and the header 233 are used. The second outer peripheral side positioning portion 72 used for positioning when the lower end portion 233a has a second plane size P2 smaller than the first plane size P1 is formed. Further, here, the recess 233c is formed on the bottom surface of the lower end portion 233a of the header 233, and the header receiving member 70 as a displacement prevention member is formed on the bottom surface of the header 233 having the first plane size P1. The first inner peripheral side positioning portion 73 used for positioning the concave portion 233c and the second outer peripheral side positioning portion used for positioning the concave portion 233c formed on the bottom surface of the header 233 having the second plane size P2. 74. As a result, the header receiving member 70 as a misalignment preventing member can be shared by the headers 233 having different plane sizes, thereby reducing the number of components and preventing misassembly. Hereinafter, the details of the positioning structure of the outdoor heat exchanger 23 including the header receiving member 70 as a displacement prevention member will be described.

  The first outer peripheral side positioning portion 71 formed on the header receiving member 70 surrounds the outer peripheral edge of the lower end portion 233a of the header 233 when the lower end portion 233a of the header 233 has the first plane size P1. This is a part for positioning on the bottom frame 52.

  Here, since the cross section of the lower end portion 233a of the header 233 is circular, the first plane size P1 means a circular shape having a larger diameter than the second plane size P2, and the center is O1. is there.

  The first outer peripheral side positioning portion 71 is a portion that rises upward from the upper surface of the main body portion 70a of the header receiving member 70, and the inner peripheral surface thereof has a lower end portion of the header 233 having the first plane size P1. The outer periphery of 233a is surrounded.

  Specifically, the 1st outer peripheral side positioning part 71 is comprised by the three parts 71a, 71b, 71c here. The first outer peripheral side positioning portion 71a is a portion surrounding a part of the outer peripheral edge of the lower end portion 233a of the header 233 having the first plane size P1 (a portion near the bottom frame rising portion 52c). The first outer peripheral positioning portion 71b is a portion that surrounds a part of the outer peripheral edge of the lower end portion 233a of the header 233 having the first plane size P1 (the portion near the partition plate 58). The 1st outer peripheral side positioning part 71c is a part surrounding a part (part near blower room S1) of the outer periphery of the lower end part 233a of the header 233 which has 1st plane size P1. Here, between the edge part of the 1st outer peripheral side positioning part 71c and the edge part of the 1st outer peripheral side positioning part 71a, it respond | corresponds to the outer periphery of the lower end part 233a of the header 233 which has 2nd plane size P2. A gap is provided so as to avoid a portion (lower end outer peripheral edge portion 233b described later). Further, a portion corresponding to the outer peripheral edge of the lower end portion 233a of the header 233 having the second plane size P2 is provided between the end portion of the first outer peripheral side positioning portion 71c and the end portion of the first outer peripheral side positioning portion 71b. A gap is provided so as to avoid (a lower-end outer peripheral edge portion 233b described later).

  The second outer peripheral side positioning portion 72 formed on the header receiving member 70 has a lower end portion 233a of the header 233 when the lower end portion 233a of the header 233 has a second plane size P2 smaller than the first plane size P1. This is a portion for positioning the header 233 on the bottom frame 52 by surrounding the outer periphery of the bottom frame 52.

  Here, since the cross section of the lower end portion 233a of the header 233 is circular, the second plane size P2 means a circular shape having a smaller diameter than the first plane size P1, and its center is O2. .

  The second outer peripheral side positioning portion 72 is a portion that rises upward from the upper surface of the main body portion 70a of the header receiving member 70, and the inner peripheral surface thereof has a lower end portion of the header 233 having the second plane size P2. The outer periphery of 233a is surrounded.

  Specifically, the 2nd outer peripheral side positioning part 72 is comprised by four parts 72a, 72b, 72c, 72d here. The second outer peripheral side positioning portion 72a is a portion that surrounds a part of the outer peripheral edge of the lower end portion 233a of the header 233 having the second plane size P2 (portion near the bottom frame rising portion 52c). The second outer peripheral positioning portion 72a is formed in a state of protruding outward from the first outer peripheral positioning portion 71 (on the bottom frame rising portion 52c and the blower chamber S1 side) in plan view of the bottom frame 52. Here, the end portion on the machine chamber S2 side of the second outer peripheral side positioning portion 72a is connected to the end portion on the blower chamber S1 side of the first outer peripheral side positioning portion 71a. The second outer peripheral positioning portion 72b is formed in a state of protruding outward from the first outer peripheral positioning portion 71 (on the bottom frame rising portion 52c and the blower chamber S1 side) in the plan view of the bottom frame 52. Here, the end portion on the machine chamber S2 side of the second outer peripheral side positioning portion 72b is connected to the end portion on the fan chamber S1 side of the first outer peripheral side positioning portion 71b. The second outer peripheral positioning portion 72 c is formed inside the first outer peripheral positioning portion 71 in the plan view of the bottom frame 52. Here, between the edge part of the 2nd outer peripheral side positioning part 72c and the edge part of the 2nd outer peripheral side positioning part 72a, it respond | corresponds to the outer periphery of the lower end part 233a of the header 233 which has 1st plane size P1. A gap is provided so as to avoid a portion (lower end outer peripheral edge portion 233b described later). The second outer peripheral positioning portion 72d is formed inside the first outer peripheral positioning portion 71 in a plan view of the bottom frame 52. Here, between the end portion of the second outer peripheral side positioning portion 72d and the end portion of the second outer peripheral side positioning portion 72b, it corresponds to the outer peripheral edge of the lower end portion 233a of the header 233 having the first plane size P1. A gap is provided so as to avoid a portion (lower end outer peripheral edge portion 233b described later).

  As described above, the second outer peripheral side positioning portion 72 (here, the second outer peripheral side positioning portions 72a and 72b) is formed in a state of protruding outward from the first outer peripheral side positioning portion 71 in the plan view of the bottom frame 52. Has been. Further, here, the second outer peripheral side positioning portion 72 (here, the second outer peripheral side positioning portions 72a and 72b) is the lower end portion 233a of the header 233 when the header 233 is positioned by the second outer peripheral side positioning portion 72. Center position O2 is the outer peripheral edge of the bottom frame 52 than the center position O1 of the lower end portion 233a of the header 233 when the header 233 is positioned by the first outer peripheral side positioning portion 71 (here, the bottom frame rising portion 52c). It is formed in the header receiving member 70 as a position shift prevention member so that it may become a position near.

  The first inner peripheral positioning portion 73 formed in the header receiving member 70 is at least partially in contact with the recess 233c of the header 233 when the lower end portion 233a of the header 233 has the first plane size P1. This is a part for positioning the header 233 on the bottom frame 52. Here, the recessed part 233c is a part recessed upwards formed in the bottom face of the lower end part 233a of the header 233. More specifically, the lower end portion 233a of the header 233 is formed with a lower end outer periphery portion 233b constituting the outer periphery of the header 233, and the recess portion 233c is formed on the inner periphery side of the lower end outer periphery portion 233b. In FIG.

  Further, the first inner circumferential side positioning portion 73 is a portion that rises upward from the upper surface of the main body portion 70a of the header receiving member 70, and the outer circumferential surface thereof has a lower end portion of the header 233 having the first planar size P1. It comes in contact with the inner peripheral surface of the recess 233c of 233a.

  Specifically, the 1st inner peripheral side positioning part 73 is comprised by the two parts 73a and 73b here. The first inner peripheral side positioning portion 73a is a portion in contact with a part of the recessed portion 233c (a portion near the machine room S2) of the lower end portion 233a of the header 233 having the first plane size P1. Here, the end portion of the first inner peripheral side positioning portion 73a is connected to the end portions of the second outer peripheral side positioning portions 72c and 72d. The first inner peripheral side positioning portion 73b is a portion in contact with a part of the recessed portion 233c (a portion closer to the fan chamber S1) of the lower end portion 233a of the header 233 having the first plane size P1. Here, between the end portion of the first inner peripheral positioning portion 73a and the end portion of the first inner peripheral positioning portion 73b, the outer peripheral edge of the lower end portion 233a of the header 233 having the second plane size P2 is provided. A gap is formed so as to avoid the corresponding portion (lower end outer peripheral edge portion 233b). Further, a hole 70b penetrating through the main body portion 70a in the vertical direction is formed inside the first inner circumferential side positioning portion 73. The hole 70b is a hole for discharging water.

  When the lower end portion 233a of the header 233 has a second plane size P2 that is smaller than the first plane size P1, the second inner peripheral positioning portion 74 formed on the header receiving member 70 has at least a recess 233c. It is a part for positioning the header 233 on the bottom frame 52 by partly contacting.

  The second inner peripheral positioning portion 74 is a portion that rises upward from the upper surface of the main body 70a of the header receiving member 70, and the outer peripheral surface of the lower end of the header 233 having the second plane size P2. It comes in contact with the inner peripheral surface of the recess 233c of 233a.

  Specifically, the 2nd inner peripheral side positioning part 74 is comprised by the two parts 74a and 74b here. The second inner peripheral side positioning portion 74a is a portion in contact with a part of the inner peripheral surface of the recess 233c of the lower end portion 233a of the header 233 having the second plane size P2 (a portion near the bottom frame rising portion 52c). . The second inner peripheral side positioning portion 74a is formed in a state of protruding outward from the first inner peripheral side positioning portion 73 (on the bottom frame rising portion 52c and the blower chamber S1 side) in plan view of the bottom frame 52. Here, the end portion of the second inner peripheral side positioning portion 74a is connected to the end portion of the first outer peripheral side positioning portion 71c. The second inner peripheral side positioning portion 74 b is formed inside the first inner peripheral side positioning portion 73 in a plan view of the bottom frame 52. Here, between the end portion of the second inner peripheral positioning portion 74a and the end portion of the second inner peripheral positioning portion 74b, the outer peripheral edge of the lower end portion 233a of the header 233 having the first plane size P1 is provided. A gap is formed so as to avoid a corresponding portion (lower end outer peripheral edge portion 233b described later). Further, the end portion of the second inner peripheral positioning portion 74b is connected to the end portion of the first inner peripheral positioning portion 73b.

  As described above, the second inner circumferential side positioning portion 74 (here, the second inner circumferential side positioning portion 74a) protrudes outward from the first inner circumferential side positioning portion 73 in a plan view of the bottom frame 52. Is formed. In addition, here, the second inner peripheral side positioning portion 74 (here, the second outer peripheral side positioning portion 74a) is the lower end portion 233a of the header 233 when the header 233 is positioned by the second inner peripheral side positioning portion 74. The center position O2 of the bottom frame 52 is lower than the center position O1 of the lower end portion 233a of the header 233 when the header 233 is positioned by the first inner peripheral side positioning portion 73 (here, the bottom frame rising portion 52c). ) Is formed in the header receiving member 70 as a position shift prevention member.

(3) Features of outdoor unit (positioning structure of outdoor heat exchanger) The outdoor unit 2 (positioning structure of the outdoor heat exchanger 23) of the air conditioner of the present embodiment has the following features.

<A>
Here, as described above, the first and second outer peripheral side positioning portions 71 and 72 (specifically, the first outer peripheral side positioning portions 71a and 71b, and the first outer periphery surrounding the outer peripheral edge of the lower end portion 233a of the header 233) The two outer peripheral side positioning portions 72a and 72b) are formed so as to protrude outward from each other in plan view of the bottom frame 52 (see FIG. 8). Then, in any case where the header 233 of the outdoor heat exchanger 23 has the first plane size P1 and when the header 233 has the second plane size P2 smaller than the first plane size P1. The outdoor heat exchanger 23 can be positioned on the bottom frame 52 of the unit casing 51 (see FIGS. 10 to 13).

  As a result, the header receiving member 70 as a misalignment preventing member can be shared by the headers 233 having different plane sizes, and the number of parts can be reduced and misassembly can be prevented.

  At this time, since the second outer peripheral positioning portion 72 can be formed at the same vertical position as the first outer peripheral positioning portion 71, the vertical length is changed for each header 233 having a different planar size. It is possible to eliminate the need to change the design.

  In addition, at this time, in the plan view of the bottom frame 52, a part of the second outer peripheral side positioning portion 72 is formed in a state of overlapping the first outer peripheral side positioning portion 71, whereby a header receiving member as a misalignment preventing member Since the plane size of 70 can be reduced, it can contribute to cost reduction.

<B>
Here, as described above, the concave portion 233c is formed on the bottom surface of the lower end portion 233a of the header 233, and the first and second inner peripheral side positioning portions 73 and 74 (specifically, the first and second positioning portions 73 and 74 in contact with the concave portion 233c). The inner peripheral side positioning portions 73a and 73b and the second inner peripheral side positioning portion 74a) are formed so as to protrude outward from each other in plan view of the bottom frame 52 (see FIG. 8). Then, in any case where the header 233 of the outdoor heat exchanger 23 has the first plane size P1 and when the header 233 has the second plane size P2 smaller than the first plane size P1. The outdoor heat exchanger 23 can be positioned on the bottom frame 52 of the unit casing 51 (see FIGS. 10 to 13).

  As a result, the header receiving member 70 as a misalignment preventing member can be shared by the headers 233 having different plane sizes, and the number of parts can be reduced and misassembly can be prevented.

  At this time, the second inner circumferential positioning portion 74 can be formed at the same vertical position as the first inner circumferential positioning portion 73, so the vertical length of each header 233 having a different planar size is also possible. It is possible to eliminate the need for design changes such as changing.

  In addition, at this time, in the plan view of the bottom frame 52, the second inner circumferential side positioning portion 74 is partially overlapped with the first inner circumferential side positioning portion 73 to form a header as a misalignment prevention member. Since the planar size of the receiving member 70 can be reduced, the cost can be reduced.

<C>
Here, as described above, the first and second inner peripheral side positioning portions 73 and 74 are formed so as to avoid the portion corresponding to the outer peripheral edge of the lower end portion of the header (lower end outer peripheral edge portion 233b). Therefore, when the header 233 having the first plane size P <b> 1 is arranged in the first inner circumferential side positioning portion 73, the second inner circumferential side positioning portion 74 is arranged at the outer peripheral edge (lower end outer peripheral edge of the lower end portion 233 a of the header 233. When the header 233 having the second plane size P2 is arranged in the second inner peripheral positioning portion 74 so as not to interfere with the portion 233b), the first inner peripheral positioning portion 73 is provided at the lower end 233a of the header 233. It is possible to prevent interference with the outer peripheral edge (the lower peripheral edge portion 233b).

<D>
In the outdoor unit 2, the outdoor heat exchanger 23 is predetermined with respect to the air inlets 53 a and 53 b (see FIG. 4) formed on the side surface and the back surface of the unit casing 51 in consideration of heat exchange performance and ventilation performance. It arrange | positions in the state which left | separated distance C (refer FIG.10 and FIG.12). At this time, when the size of the header 233 is changed together with the heat transfer tubes 231 and the heat transfer fins 232 and 235 constituting the outdoor heat exchanger 23, the distance between the outdoor heat exchanger 23 and the suction ports 53a and 53b is set to a predetermined value. In order to maintain the distance C at a distance, the first and second outer peripheral side positioning portions 71 and 72 and the first and second inner peripheral side positioning portions 73 and 74 are arranged according to the planar size of the header 233. There is a need. And when header 233 has the 2nd plane size P2, compared with the case where header 233 has the 1st plane size P1, the size of heat exchanger tube 231 and heat transfer fins 232 and 235 is also small with header 233. Become. Therefore, in this case, in order to make the distance between the outdoor heat exchanger 23 and the suction ports 53a, 53b a predetermined distance C, the header 233 having the second plane size P2 is It is necessary to arrange the unit casing 51 at a position closer to the side surface and the back surface than the header 233 having the one planar size P1.

  Therefore, here, as described above, the central position O2 of the second outer peripheral side positioning portion 72 and the second inner peripheral side positioning portion 74 for positioning the header 233 having a small planar size is used as the header 233 having a large planar size. Arranged to be closer to the outer peripheral edge of the bottom frame 52 (here, the bottom frame rising portion 52c) than the center position O1 of the first outer peripheral side positioning part 71 and the first inner peripheral side positioning part 73 for positioning. Like to do.

  Thereby, not only can the header receiving member 70 as a displacement prevention member be shared by the headers 233 having different plane sizes, but the outdoor heat exchanger 23 having the headers 233 having different plane sizes can be used for the heat exchange performance and the ventilation performance. Can be positioned at an appropriate position on the bottom frame 52 of the unit casing 51.

<E>
Here, as described above, the header receiving member 70 serving as a misalignment preventing member includes not only the outer peripheral positioning portions 71 and 72 surrounding the outer peripheral edge of the lower end portion 233a of the header 233 but also the bottom surface of the lower end portion 233a of the header 233. The inner peripheral side positioning portions 73 and 74 that are in contact with the concave portion 233c are formed.

  Thereby, here, the positioning performance of the lower end portion 233a of the header 233 is improved by the two types of positioning portions that position the lower end portion 233a of the header 233 from the inside and the outside.

<F>
Here, as described above, the recessed portion 233c is formed on the bottom surface of the lower end portion 233a of the header 233. By using this, the first outer peripheral side positioning portion 71 and the first outer side positioning portion 71 in the plan view of the bottom frame 52 are used. The positioning portion of the lower end portion 233a of the header 233 is also formed in a portion where the outer peripheral side positioning portion 72 overlaps or a portion where the first inner peripheral positioning portion 73 and the second inner peripheral positioning portion 74 overlap. ing.

  Specifically, the first outer peripheral side positioning for positioning the lower end portion 233a of the header 233 having the first plane size P1 at the portion where the first outer peripheral side positioning unit 71 and the second outer peripheral side positioning unit 72 overlap. A portion 71c and second outer peripheral side positioning portions 72c and 72d for positioning the lower end portion 233a of the header 233 having the second plane size P2 are formed. In addition, the first inner circumference side positioning portion that positions the lower end portion 233a of the header 233 having the first plane size P1 is located in a portion where the first inner circumference side positioning portion 73 and the second inner circumference side positioning portion 74 overlap. A portion 73b and a second inner peripheral side positioning portion 74b for positioning the lower end portion 233a of the header 233 having the second plane size P2 are formed.

  Thereby, in the plan view of the bottom frame 52, the header is formed by the positioning portion formed also in the portion where the positioning portions overlap each other by using the recess portion 233c formed on the bottom surface of the lower end portion 233a of the header 233. The positioning performance of the lower end portion 233a of 233 is improved.

(4) Modification <A>
In said embodiment (refer FIGS. 8-13), the inner peripheral side positioning parts 73 and 74 have a wall shape which follows only the inner peripheral surface of the recessed part 233c formed in the lower end part 233a of the header 233. However, the present invention is not limited to this.

  For example, as shown in FIGS. 14 and 15, the inner peripheral positioning portions 73 and 74 may have a column shape that fills a recess 233 c formed in the lower end 233 a of the header 233. Here, positioning portions 71c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c, 72c Since 72d, 73b, and 74b are formed, as a columnar portion, a portion that constitutes the positioning portions 71c and 74a, a portion that constitutes the positioning portions 73b and 74b, and a positioning portion 73a, 72c, and 72d are constituted. A part is formed.

<B>
In the above-described embodiment (see FIGS. 8 to 13) and Modification A (see FIGS. 14 and 15), the lower end portion 233a of the header 233 is positioned from the inner side and the outer side to the header receiving member 70 as a misalignment prevention member. Two types of positioning portions are formed, but only one of the positioning portions may be formed.

  For example, as shown in FIG. 16, only the first outer peripheral side positioning portion 71 and the second outer peripheral side positioning portion 72 are formed on the header receiving member 70 as a misalignment prevention member, and the outer end of the lower end portion 233 a of the header 233 is The header 233 may be positioned in the shape of the bottom frame 52 by surrounding the periphery. Here, as the header 233, in the case where the same bottom end 233a as in the above embodiment is formed with a recess 233c formed on the bottom surface, the first outer peripheral positioning portion 71 and the second outer peripheral positioning portion 72 are used. The first outer peripheral side positioning portions 71a and 71b and the second outer peripheral side positioning portions 72a and 72b are formed in the portions protruding to the outside of each other, and the outer peripheral side positioning portions 71 and 72 are in a plan view of the bottom frame 52. You may form the 1st outer peripheral side positioning part 71c and the 2nd outer peripheral side positioning part 72c, 72d in the overlapping part. Further, when the header 233 having the bottom surface of the lower end portion 233a having no recess 233c is used, the first outer peripheral side positioning portion 71 and the second outer peripheral side positioning portion 72 protrude outside each other. The first outer peripheral positioning portions 71a and 71b and the second outer peripheral positioning portions 72a and 72b may be formed only in the portions.

  In addition, as shown in FIG. 17, only the first inner circumferential side positioning portion 73 and the second inner circumferential side positioning portion 74 may be formed in the header receiving member 70 as a misalignment preventing member. Here, as the first inner circumferential side positioning portion 73 and the second inner circumferential side positioning portion 74, the first inner circumferential side positioning portion 73 a and the second inner circumferential side positioning portion 74 are formed in portions protruding outward from each other, as in the above embodiment. While forming the inner peripheral side positioning part 74a, the first inner peripheral side positioning part 73b and the second inner peripheral side positioning part 74b are formed in a portion where the inner peripheral side positioning parts 73 and 74 overlap each other in a plan view of the bottom frame 52. It may be formed. Further, when the positioning performance can be secured only by the first inner circumferential side positioning portion 73a and the second inner circumferential side positioning portion 74a, the first inner circumferential side positioning portion 73b and the second inner circumferential side positioning portion 74b are omitted. May be.

<C>
In the above embodiment (see FIGS. 8 to 13) and Modifications A and B (see FIGS. 14 to 17), the cross section of the lower end portion 233a of the header 233 is circular, but is not limited thereto. is not.

  For example, although not shown here, the cross section of the lower end portion 233a of the header 233 may be another shape such as an ellipse or a polygon.

<D>
In the above-described embodiment (see FIGS. 8 to 13) and modifications A to C (see FIGS. 14 to 17), a part of the second outer peripheral side positioning portion 72 is the first outer periphery in the plan view of the bottom frame 52. It is formed in a state of protruding to the outside of the side positioning portion 71 (that is, a state in which both overlap each other), and a part of the second inner peripheral side positioning portion 74 is part of the first inner peripheral side positioning portion 73. Although it forms in the state which protruded outside (namely, the state which has both overlapped), it is not limited to this.

  For example, although not shown here, in the plan view of the bottom frame 52, the entire second outer peripheral side positioning portion 72 protrudes outside the first outer peripheral side positioning portion 71 (that is, a state in which both do not overlap) In addition, the entire second inner circumferential side positioning portion 74 protrudes to the outside of the first inner circumferential side positioning portion 73 (that is, the state where both do not overlap). May be.

<E>
In the above-described embodiment (see FIGS. 8 to 13) and modifications A to D (see FIGS. 14 to 17), in the header receiving member 70 that receives the header 233 arranged in the A part of FIG. By forming 71 to 74, the header receiving member 70 is made to function as a misalignment preventing member that can be shared for positioning the header 233 having a different planar size, but is not limited thereto.

  For example, although not shown in detail, in the header receiving member 80 that receives the header 234 arranged in the B portion of FIG. 4, the header receiving member 80 is flattened by forming an outer peripheral side positioning portion similar to the header receiving member 70. You may make it function as a position shift prevention member which can be shared for positioning of the header 234 from which size differs. Further, by forming a recessed portion 234c similar to the header 233 on the bottom surface of the lower end portion 234a of the header 234, and forming an inner peripheral side positioning portion similar to the header receiving member 70, the header receiving member 80 has a planar size. You may make it function as a position shift prevention member which can be shared by positioning of the different headers 234. Even in this case, like the inner peripheral positioning portions 73 and 74 of the header receiving member 70, the inner peripheral positioning portions correspond to the outer peripheral edge of the lower end portion 234a of the header 234 (lower outer peripheral portion 234b. ) Is preferably formed in the header receiving member 80. Also in this case, in consideration of heat exchange performance and ventilation performance, the center position of the header 234 having a smaller planar size is set to be the outer peripheral edge of the bottom frame 52 (here, the bottom position) than the center position of the header 234 having a larger planar size. It is preferable to arrange it so as to be close to the frame rising portion 52d).

<F>
In the above-described embodiment (see FIGS. 8 to 13) and modification examples A to E (see FIGS. 14 to 17), the misalignment prevention member can be adapted to the positioning of headers 233 and 234 having two large and small plane sizes. However, the present invention is not limited to this.

  For example, although not shown here, the positioning portions may be formed in the header receiving members 70 and 80 serving as misalignment preventing members so as to be able to cope with three or more different plane sizes. Even in this case, it is preferable to arrange the positioning portion at a position closer to the side surface or the back surface of the unit casing 51 as the plane size of the headers 233 and 234 becomes smaller in consideration of heat exchange performance and ventilation performance.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to an outdoor unit of an air conditioner in which an outdoor heat exchanger composed of an all-aluminum heat exchanger having an aluminum or aluminum alloy header extending in the vertical direction is provided in a casing. It is.

2 Outdoor unit 51 Unit casing 23 Outdoor heat exchanger 52 Bottom frame 70, 80 Header receiving member (position shift prevention member)
71 First outer peripheral positioning portion 72 Second outer peripheral positioning portion 73 First inner peripheral positioning portion 74 Second inner peripheral positioning portion 231 Heat transfer tube 233, 234 Header 233c, 234c Recessed portion 233b, 234b Lower end outer peripheral portion

JP 2011-145029 A

Claims (6)

A heat transfer tube (231) made of aluminum or aluminum alloy arranged in a plurality of stages in the vertical direction, and made of aluminum or aluminum alloy that extends in the vertical direction and is connected to the longitudinal ends of the heat transfer tubes. An outdoor heat exchanger (23) comprising an all-aluminum heat exchanger having headers (233, 234);
A casing (51) having a bottom frame (52) on which the outdoor heat exchanger is placed;
The first frame is disposed on the bottom frame, and when the lower end portion of the header has a first plane size, the header is positioned on the bottom frame by surrounding an outer peripheral edge of the lower end portion of the header. A position shift prevention member (70, 80) having electrical insulation, on which an outer peripheral side positioning portion (71) is formed;
With
When the lower end portion of the header has a second plane size smaller than the first plane size, the misalignment prevention member surrounds the outer peripheral edge of the lower end portion of the header so that the header is placed on the bottom. A second outer peripheral positioning portion (72) positioned on the frame is further formed in a state of protruding outward from the first outer peripheral positioning portion in a plan view of the bottom frame;
Air conditioner outdoor unit (2). A heat transfer tube (231) made of aluminum or aluminum alloy arranged in a plurality of stages in the vertical direction, and made of aluminum or aluminum alloy that extends in the vertical direction and is connected to the longitudinal ends of the heat transfer tubes. An outdoor heat exchanger (23) comprising an all-aluminum heat exchanger having headers (233, 234);
A casing (51) having a bottom frame (52) on which the outdoor heat exchanger is placed;
With
On the bottom surface of the lower end portion of the header, recessed portions (233c, 234c) recessed upward are formed,
In the case where the lower end portion of the header has a first planar size, a displacement-preventing member (70) having an electrical insulating property in which a first inner peripheral positioning portion (73) at least partially in contact with the recessed portion is formed. 80) are arranged on the bottom frame,
When the lower end portion of the header has a second plane size smaller than the first plane size, the misalignment prevention member includes a second inner peripheral side positioning portion (at least a part of which is in contact with the recess portion). 74) is further formed in a state of protruding outward from the first inner peripheral side positioning portion in the plan view of the bottom frame,
Air conditioner outdoor unit (2). The first inner peripheral positioning portion (73) is configured to prevent the misalignment prevention member (70) so as to avoid a portion corresponding to the outer peripheral edge of the lower end portion of the header (233, 234) having the second planar size. 80),
The second inner peripheral positioning portion (74) is formed on the misalignment prevention member so as to avoid a portion corresponding to the outer peripheral edge of the lower end portion of the header having the first planar size.
The outdoor unit (2) of the air conditioning apparatus according to claim 2. At the lower end of the header (233, 234), a lower end outer peripheral edge (233b, 234b) that constitutes the outer peripheral edge of the header, and a dent recessed upward on the inner peripheral side of the lower end outer peripheral edge (233c, 234c) are formed,
The first inner peripheral positioning portion (73) is formed on the misalignment prevention member (70, 80) so as to avoid the lower peripheral edge of the header having the second planar size,
The second inner peripheral positioning portion (74) is formed on the misalignment prevention member so as to avoid the lower peripheral edge of the header having the first planar size.
The outdoor unit (2) of the air conditioning apparatus according to claim 2. The second outer peripheral side positioning portion (72) is configured such that a central position of a lower end portion of the header when the header (233, 234) is positioned by the second outer peripheral side positioning portion, the header is the first outer peripheral portion. The displacement prevention member (70, 80) is positioned closer to the outer peripheral edge of the bottom frame (52) than the center position of the lower end of the header when positioned by the side positioning portion (71). Formed,
The outdoor unit (2) of the air conditioning apparatus according to claim 1. The second inner peripheral side positioning portion (74) is configured such that a central position of a lower end portion of the header when the header (233, 234) is positioned by the second inner peripheral side positioning portion is the header is the first position. The position shift prevention member (70, 70) is positioned closer to the outer peripheral edge of the bottom frame (52) than the center position of the lower end of the header when positioned by the inner peripheral positioning portion (73). 80),
The outdoor unit (2) of the air conditioning apparatus of any one of Claims 2-4.

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