JP4947043B2 - Outdoor unit for air conditioner and method for manufacturing the same - Google Patents

Description

  The present invention relates to an outdoor unit for an air conditioner and a method for manufacturing the same.

  In recent years, an air conditioner outdoor unit designed in a compact manner has been proposed in order to cope with the limited installation space of the outdoor unit.

For example, in the outdoor unit of an air conditioner described in Patent Document 1 shown below, in a side blower outdoor unit in which the rotation axis direction of the fan is a horizontal direction, it is proposed that the accumulator is disposed below the fan. Yes. Thereby, the width | variety of the outdoor unit in the rotating shaft direction of a fan can be made compact.
JP 2000-88292 A

  The heat exchanger of the outdoor unit is provided only along the outer edge shape of the outdoor unit casing, and includes only a heat exchanger that is bent in an L shape and disposed on the leeward side.

  However, for example, when using not only such a heat exchanger but also a separate heat exchanger, it is necessary to secure an arrangement space in the outdoor unit, and the outdoor unit becomes large.

  The subject of the present invention is not only the heat exchanger provided in the outdoor unit so as to follow the outer edge shape of the outdoor unit casing, but also in the case where a separate heat exchanger is provided inside, the area in plan view in the installed state It is an object of the present invention to provide an outdoor unit for an air conditioner and a method for manufacturing the same that can improve assembly workability while reducing the size.

  The manufacturing method of the outdoor unit of the air conditioning apparatus of 1st invention is a manufacturing method of the outdoor unit of the air conditioning apparatus installed outdoors, Comprising: The following steps are provided. In one of the steps, a plurality of heat exchange pipes are provided so that the first heat transfer pipe and the second heat transfer pipe are in contact with each other. In one of the steps, a plurality of assembly elements obtained by integrating a plurality of heat exchange pipes and a guided member are created. In one of the steps, a frame including a guide member extending in a substantially vertical direction is arranged so that the guide member extends in a substantially vertical direction. In one of the steps, the guided member is guided by the guide member, whereby each of the plurality of assembly elements is led to its predetermined position by its own weight, thereby creating an internal heat exchanger assembly. In one of the steps, the state of the internal heat exchanger assembly is accommodated inside the outdoor unit casing and the outdoor heat exchanger so that the longitudinal direction is substantially vertical.

  In this method of manufacturing an outdoor unit for an air conditioner, even if the internal heat exchanger is provided separately from the outdoor heat exchanger, the internal heat exchanger is arranged so that the longitudinal direction thereof is substantially vertical. Yes. For this reason, in the installation state of the outdoor unit of an air conditioning apparatus, it becomes possible to suppress the area in planar view small.

  Further, here, the operation of creating an internal heat exchanger assembly by combining a plurality of assembly elements with a frame body is guided to a predetermined position by the weight of each assembly element when the guided member is guided to the predetermined position by the guide member. Therefore, the internal heat exchanger assembly can be easily manufactured.

  A method for manufacturing an outdoor unit for an air conditioner according to a second aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to the first aspect of the present invention, wherein the side frame or the outdoor heat exchanger covers at least a part of the side surface of the outdoor unit casing. There is further provided a step of fixing the frame body using at least one of the fixing tool.

  Here, an outdoor unit capable of suppressing the shaking of the internal heat exchanger while suppressing the shaking of the frame can be obtained.

  The method for manufacturing an outdoor unit for an air conditioner according to a third aspect of the invention is the method for manufacturing an outdoor unit for an air conditioner according to the second aspect of the invention, wherein the longitudinal direction of the internal heat exchanger and the longitudinal direction of the frame are substantially the same in the fixing step. After the vertical direction, the upper half portion of the frame in the longitudinal direction is fixed with a fixture.

  Here, when the longitudinal direction of the internal heat exchanger or the frame is substantially vertical, the swing around the lower end tends to occur near the upper end. On the other hand, in the outdoor unit of the air conditioner obtained by this manufacturing method, the part of the upper half side of the longitudinal direction of the frame is fixed by a fixture. For this reason, it becomes possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  The method for manufacturing an outdoor unit for an air conditioner according to a fourth aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to the second aspect or the third aspect of the invention, wherein in the fixing step, the fixing tool is separated from the fixed portion for the frame. The connecting portion extending in the direction is fixed in a state in which the width in the vertical direction is larger than the width in the horizontal direction.

  Here, an outdoor unit capable of reducing the ventilation resistance can be obtained by providing the connecting portion along the flow direction of the air passing through the outdoor heat exchanger.

  The method for manufacturing an outdoor unit for an air conditioner according to a fifth aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to any one of the second to fourth aspects, wherein the first fixing tool and the second fixing are performed in the fixing step. Using a tool, the first frame portion and the second frame portion are fixed so that the height positions in the vertical direction are different. The first fixing tool fixes the first frame portion of the frame body to the first fixing portion of at least one of the outdoor heat exchanger or the side frame of the outdoor unit casing. The second fixture is a part of the frame other than the first frame part, and the second frame part is a part other than the first fixed part of at least one of the outdoor heat exchanger and the side frame of the outdoor unit casing. It fixes to the 2nd fixed part which is a part.

  Here, as compared with the case where the first frame body portion and the second frame body portion are at the same height position, it becomes possible to suppress the shaking of the frame body and to suppress the shaking of the internal heat exchanger. It is possible to obtain an outdoor unit capable of performing the above.

  According to a sixth aspect of the present invention, there is provided a method for manufacturing an outdoor unit for an air conditioner. The method for fixing an outdoor unit for an air conditioner according to the fifth aspect of the present invention includes the step of fixing, and the second fixing and the longitudinal direction of the first fixture in plan view. The smaller one of the angles formed with the longitudinal direction of the tool is fixed so that it is 90 degrees or more and 180 degrees or less.

  Here, since the position where the first fixing tool is fixed can be separated from the position where the second fixing tool is fixed, it is possible to suppress the shaking of the frame body, and the internal heat exchanger An outdoor unit can be obtained in which shaking can be further reduced.

  The method for manufacturing an outdoor unit for an air conditioner according to a seventh aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to any one of the first to sixth aspects, wherein the first heat transfer tube is helical with respect to the second heat transfer tube. By winding in a shape, the first heat transfer tube and the second heat transfer tube are in contact with each other.

  Here, since the first heat transfer tube is in contact with the second heat transfer tube by being spirally wound, it is compared with the case where the second heat transfer tube and the first heat transfer tube are in contact with each other in a linearly extending state. Thus, the contact area can be increased.

  Thereby, the heat exchange efficiency of the refrigerant | coolant which flows through the inside of a 1st heat exchanger tube, and the refrigerant | coolant which flows through the inside of a 2nd heat exchanger tube can be improved.

  The method for manufacturing an outdoor unit for an air conditioner according to an eighth aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to any of the first to seventh aspects, wherein each of the plurality of assembly elements is moved to its predetermined position by its own weight. After guiding, before changing the state of the internal heat exchanger assembly into the installation state in which the longitudinal direction is substantially vertical, the legs of the internal heat exchanger assembly are in the installation state while reinforcing the internal heat exchanger assembly. The leg frame reinforcing member that functions as the above is attached so that the guide function of the guide member is not exhibited.

  In this method for manufacturing an outdoor unit for an air conditioner, the installation stability of each assembly element can be stabilized even when the longitudinal direction of the first heat transfer tube is substantially vertical in the state of the internal heat exchanger assembly. Can be improved.

  The method for manufacturing an outdoor unit for an air conditioner according to a ninth aspect of the present invention is the method for manufacturing an outdoor unit for an air conditioner according to any one of the first to eighth aspects, wherein the step of creating the internal heat exchanger assembly includes a plurality of methods. The assembly element and the frame are integrated. Examples of the integration method include a method of screwing each other by passing a screw through a screw hole, a method of welding each other, and the like.

  Here, the outdoor unit of the air conditioner is assembled in a state where a plurality of assembly elements having a plurality of heat exchange pipes and guided members and a frame including the guide members are integrated so as not to be separated. Can do. Thereby, assembly workability | operativity can be improved.

An outdoor unit of an air conditioner according to a tenth aspect of the invention is an outdoor unit of an air conditioner installed outdoors, and includes an outdoor unit casing, an outdoor heat exchanger, and an internal heat exchanger. The outdoor unit casing has a bottom surface, a top surface, and a side surface, and has a substantially rectangular parallelepiped shape. The outdoor heat exchanger is arrange | positioned so that at least one part of a side part may be covered. The internal heat exchanger includes a first heat transfer tube that is disposed inside the outdoor unit casing and has a longitudinal direction that is substantially vertical, and a second heat transfer tube that is in contact with the first heat transfer tube. Heat is exchanged between the refrigerant flowing through the heat pipe and the refrigerant flowing through the second heat transfer pipe without being mixed with each other. The internal heat exchanger has an assembly element and a support frame. The assembly element is further curved by combining the first heat transfer tube and the second heat transfer tube. The support frame can support one assembly element and can integrally support a plurality of assembly elements. There is further provided a fixing tool for fixing the frame body to at least one of the outdoor heat exchanger and the side surface portion of the outdoor unit casing. The fixture has a connecting portion extending in a direction away from the fixed portion of the frame. The connecting portion has a larger width in the vertical direction than in the horizontal direction.

  In the outdoor unit of this air conditioner, even if the internal heat exchanger is provided separately from the outdoor heat exchanger, it is arranged so that the longitudinal direction of the internal heat exchanger is substantially vertical.

  Thereby, in the installation state of the outdoor unit of the air conditioner, it is possible to reduce the area in plan view.

  Furthermore, in the outdoor unit of this air conditioner, a plurality of assembly elements formed by combining the first heat transfer tube and the second heat transfer tube and further curved are integrally supported by the support frame. In addition to the improvement, the installation stability of the internal heat exchanger in the outdoor unit casing can be improved.

  Further, even when only one assembly element is supported or when a plurality of assembly elements are integrally supported, the same support frame can be used in combination.

  In addition, here, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  In addition, here, by providing the connecting portion along the flow direction of the air passing through the outdoor heat exchanger, the ventilation resistance can be reduced.

The outdoor unit of the air conditioner of the eleventh aspect of the invention is the outdoor unit of the air conditioner of the tenth aspect of the invention, wherein the longitudinal direction of the internal heat exchanger and the longitudinal direction of the frame are substantially vertical. A part of the fixing tool is fixed to a portion on the upper half side in the longitudinal direction of the frame.

  Here, when the longitudinal direction of the internal heat exchanger or the frame is substantially vertical, the swing around the lower end tends to occur near the upper end. On the other hand, in the outdoor unit of this air conditioner, the upper half portion of the frame body in the longitudinal direction is fixed by a fixture. For this reason, it becomes possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

An outdoor unit of an air conditioner according to a twelfth aspect of the invention is an outdoor unit of an air conditioner installed outdoors, and includes an outdoor unit casing, an outdoor heat exchanger, and an internal heat exchanger. The outdoor unit casing has a bottom surface, a top surface, and a side surface, and has a substantially rectangular parallelepiped shape. The outdoor heat exchanger is arrange | positioned so that at least one part of a side part may be covered. The internal heat exchanger includes a first heat transfer tube that is disposed inside the outdoor unit casing and has a longitudinal direction that is substantially vertical, and a second heat transfer tube that is in contact with the first heat transfer tube. Heat is exchanged between the refrigerant flowing through the heat pipe and the refrigerant flowing through the second heat transfer pipe without being mixed with each other. The internal heat exchanger has an assembly element and a support frame. The assembly element is further curved by combining the first heat transfer tube and the second heat transfer tube. The support frame can support one assembly element and can integrally support a plurality of assembly elements. There is further provided a fixing tool for fixing the frame body to at least one of the outdoor heat exchanger and the side surface portion of the outdoor unit casing. The fixture has a first fixture and a second fixture. The first fixing tool fixes the first frame portion of the frame body to the first fixing portion of at least one of the outdoor heat exchanger or the side frame of the outdoor unit casing. The second fixture is a part of the frame other than the first frame part, and the second frame part is a part other than the first fixed part of at least one of the outdoor heat exchanger and the side frame of the outdoor unit casing. It fixes to the 2nd fixed part which is a part. The first frame part and the second frame part have different height positions in the vertical direction.

  In the outdoor unit of this air conditioner, even if the internal heat exchanger is provided separately from the outdoor heat exchanger, it is arranged so that the longitudinal direction of the internal heat exchanger is substantially vertical.

  Thereby, in the installation state of the outdoor unit of the air conditioner, it is possible to reduce the area in plan view.

  Furthermore, in the outdoor unit of this air conditioner, a plurality of assembly elements formed by combining the first heat transfer tube and the second heat transfer tube and further curved are integrally supported by the support frame. In addition to the improvement, the installation stability of the internal heat exchanger in the outdoor unit casing can be improved.

  Further, even when only one assembly element is supported or when a plurality of assembly elements are integrally supported, the same support frame can be used in combination.

  In addition, here, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  In addition, here, compared to the case where the first frame body portion and the second frame body portion are at the same height position, it becomes possible to suppress the shaking of the frame body, and the shaking of the internal heat exchanger is also reduced. It becomes possible to keep it small.

The outdoor unit of the air conditioner of the thirteenth aspect of the present invention is the outdoor unit of the air conditioner of the twelfth aspect of the present invention, which is the smaller of the angles formed by the longitudinal direction of the first fixture and the longitudinal direction of the second fixture in plan view. The angle is 90 degrees or more and 180 degrees or less.

  Here, since the position where the first fixing tool is fixed can be separated from the position where the second fixing tool is fixed, it is possible to suppress the shaking of the frame body, and the internal heat exchanger The shaking can be suppressed to a smaller level.

The outdoor unit of the air conditioner of the fourteenth aspect of the present invention is the outdoor unit of the air conditioner of the twelfth or thirteenth aspect of the present invention, wherein the longitudinal direction of the internal heat exchanger and the longitudinal direction of the frame are substantially vertical. A part of the fixing tool is fixed to a portion on the upper half side in the longitudinal direction of the frame.

  Here, when the longitudinal direction of the internal heat exchanger or the frame is substantially vertical, the swing around the lower end tends to occur near the upper end. On the other hand, in the outdoor unit of this air conditioner, the upper half portion of the frame body in the longitudinal direction is fixed by a fixture. For this reason, it becomes possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

The outdoor unit of the air conditioner of the fifteenth aspect of the present invention is the outdoor unit of the air conditioner of the twelfth or thirteenth aspect of the present invention, wherein the fixture has a communication portion extending in a direction away from the fixed part of the frame. Yes. The connecting portion has a larger width in the vertical direction than in the horizontal direction.

  Here, by providing the connecting portion along the flow direction of the air passing through the outdoor heat exchanger, the ventilation resistance can be reduced.

  An outdoor unit for an air conditioner according to a sixteenth aspect of the present invention is the outdoor unit for an air conditioner according to any one of the tenth to fifteenth aspects, wherein the first heat transfer tube is spirally wound around the second heat transfer tube.

  Here, since the first heat transfer tube is spirally wound and is in contact with the second heat transfer tube, the second heat transfer tube and the first heat transfer tube are in contact with each other in a linearly extending state. The contact area can be increased.

  Thereby, the heat exchange efficiency of the refrigerant | coolant which flows through the inside of a 1st heat exchanger tube, and the refrigerant | coolant which flows through the inside of a 2nd heat exchanger tube can be improved.

  An outdoor unit for an air conditioner according to a seventeenth aspect of the present invention is the outdoor unit for an air conditioner according to any one of the tenth to sixteenth aspects, wherein the support frame and the plurality of assembly elements remain integrated. It is obtained by disposing on the bottom surface of the casing.

  Here, when the outdoor unit of the air conditioner is assembled, a plurality of assembly elements can be arranged in a state in which the support frame and the plurality of assembly elements remain integrated. And the support frame do not easily fall apart.

  As described above, since the arrangement work can be performed while maintaining the integrity of the plurality of assembly elements and the support frame, the assembly workability can be improved.

  An outdoor unit for an air conditioner according to an eighteenth aspect of the present invention is the outdoor unit for an air conditioner according to any of the tenth to sixteenth aspects, further comprising a pressure-resistant refrigerant container. The pressure-resistant refrigerant container has pressure resistance when using at least the working refrigerant in the refrigeration cycle, and constitutes a part of the refrigeration cycle. At least some of the plurality of assembly elements are located at least vertically above the pressure-resistant refrigerant container.

  Here, the space inside the outdoor unit casing and the space above the pressure-resistant refrigerant container can be used effectively by using the installation positions of the plurality of assembly elements.

  An outdoor unit of an air conditioner according to a nineteenth aspect of the present invention is the outdoor unit of an air conditioner according to the eighteenth aspect of the present invention, wherein the pressure-resistant refrigerant container has a substantially cylindrical shape whose axial direction is the longitudinal direction, On the other hand, it is arrange | positioned so that a longitudinal direction may become substantially parallel.

  Here, by placing the pressure-resistant refrigerant container horizontally, not only the stability of the arrangement of the pressure-resistant refrigerant container can be improved, but also the stability of the arrangement can be improved for a plurality of assembly elements arranged above the pressure-resistant refrigerant container. be able to.

  An outdoor unit for an air conditioner according to a twentieth aspect of the present invention is the outdoor unit for an air conditioner according to any one of the tenth to sixteenth aspects, further comprising a pressure-resistant refrigerant container. The pressure-resistant refrigerant container has a pressure-resistant strength when using at least the working refrigerant in the refrigeration cycle, has a substantially cylindrical shape whose axial direction is the longitudinal direction, and is substantially parallel to the bottom surface portion. Are arranged on the upper surface side of the bottom surface portion and constitute a part of the refrigeration cycle. The outdoor unit of the air conditioner of the tenth aspect of the invention can be obtained by arranging the integrated support frame and the plurality of assembly elements so as to directly apply the weight to the pressure-resistant refrigerant container while straddling the axis of the pressure-resistant refrigerant container.

  Here, the space inside the outdoor unit casing and above the horizontally disposed pressure-resistant refrigerant container can be used effectively by using it as the installation position of the plurality of assembly elements.

  Moreover, it arrange | positions so that the weight of a support frame and several assembly elements may be applied with respect to the pressure-resistant refrigerant | coolant container which is a heavy article and is set | placed horizontally. For this reason, it becomes possible to stabilize the installation of the support frame and the plurality of assembly elements themselves.

  An outdoor unit of an air conditioner according to a twenty-first aspect of the present invention is the outdoor unit of the air conditioner according to any of the tenth to twentieth aspects of the present invention, wherein the pressure-resistant refrigerant container is at least one of a receiver and an accumulator.

  Here, even when an accumulator or a receiver is used as the pressure-resistant refrigerant container, the installation stability of the internal heat exchanger in the outdoor unit casing can be improved while improving the assembling workability.

  In the first invention, it is possible to easily manufacture the internal heat exchanger assembly while keeping the area of the outdoor unit in plan view small.

  In the second aspect of the invention, an outdoor unit that can suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame can be obtained.

  In the third invention, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  In the fourth aspect of the invention, an outdoor unit that can keep the draft resistance small can be obtained.

  According to the fifth aspect of the invention, it is possible to obtain an outdoor unit that can suppress the shaking of the frame body to be small and can also suppress the shaking of the internal heat exchanger.

  According to the sixth aspect of the invention, an outdoor unit can be obtained in which the shaking of the frame body can be further reduced and the shaking of the internal heat exchanger can be further reduced.

  In the seventh invention, the heat exchange efficiency between the refrigerant flowing in the first heat transfer tube and the refrigerant flowing in the second heat transfer tube can be improved.

  In the eighth invention, the installation stability of each assembly element can be improved.

  In the ninth invention, assembly workability can be improved.

In the tenth aspect of the invention, in the installation state of the outdoor unit of the air conditioner, the assembly workability can be improved while the area in plan view is kept small, and the installation stability of the internal heat exchanger in the outdoor unit casing is improved. It is possible to improve, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame, and to provide a connecting portion along the flow direction of the air passing through the outdoor heat exchanger Thus, it is possible to keep the draft resistance small.

  In the eleventh aspect, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  In the twelfth invention, in the installation state of the outdoor unit of the air conditioner, the assembly workability can be improved while the area in plan view is kept small, and the installation stability of the internal heat exchanger in the outdoor unit casing is improved. It is possible to improve, it is possible to suppress the shaking of the frame body, and it is also possible to suppress the shaking of the internal heat exchanger.

  In the thirteenth invention, it becomes possible to suppress the shaking of the frame body to a smaller level, and the shaking of the internal heat exchanger can also be suppressed to a smaller level.

  In the fourteenth aspect, it is possible to suppress the shaking of the internal heat exchanger while suppressing the shaking of the frame.

  In the fifteenth aspect, by providing the connecting portion along the flow direction of the air passing through the outdoor heat exchanger, the ventilation resistance can be reduced.

  In the sixteenth aspect, the heat exchange efficiency between the refrigerant flowing in the first heat transfer tube and the refrigerant flowing in the second heat transfer tube can be improved.

  In the seventeenth aspect, since the arrangement work can be performed while maintaining the integrity of the plurality of assembly elements and the support frame, the assembly workability can be improved.

  In the eighteenth aspect of the invention, the space inside the outdoor unit casing and above the pressure-resistant refrigerant container can be used effectively by using it as the installation position of the plurality of assembly elements.

  In the nineteenth aspect, the stability of the arrangement of the pressure-resistant refrigerant container and the plurality of assembly elements can be improved.

  In the twentieth aspect, the space inside the outdoor unit casing and above the horizontally placed pressure-resistant refrigerant container can be effectively used, and the installation of the support frame and the plurality of assembly elements themselves can be stabilized.

  In the twenty-first aspect, even when an accumulator or a receiver is used as the pressure-resistant refrigerant container, the installation stability of the internal heat exchanger in the outdoor unit casing can be improved while improving the assembling workability.

  Specific examples of the outdoor unit for an air-conditioning apparatus of the present invention will be described below in detail with reference to the drawings.

<1> 1st Embodiment <1-1> Schematic structure of the outdoor unit of an air conditioning apparatus In FIG. 1, the schematic external appearance perspective view of the outdoor unit 1 of an air conditioning apparatus is shown.

  FIG. 2 shows a schematic external perspective view of the internal structure of the outdoor unit 1 of the air conditioner.

  In FIG. 3, the schematic perspective view about the arrangement | positioning relationship of an internal heat exchanger and an accumulator is shown.

  In FIG. 4, the schematic perspective view about the arrangement | positioning relationship of an accumulator and an internal heat exchanger support stand is shown.

  In FIG. 5, the top view about the arrangement | positioning relationship of an accumulator and a compression mechanism is shown.

  FIG. 6 is a schematic perspective view showing a state where the electromagnetic opening / closing valve is supported with respect to the inner frame.

  The outdoor unit 1 of the air conditioner is used as a heat source unit in a refrigeration cycle using carbon dioxide as a working refrigerant so as to pass a pressure test according to the high pressure gas safety method when the design pressure is 12.3 MPa. Designed.

  As shown in FIGS. 1 to 5, the outdoor unit 1 of the air conditioner mainly includes an outdoor unit casing 2, a compression mechanism 3, an outdoor heat exchanger 4, an internal heat exchanger 6, an accumulator 9, an electromagnetic on-off valve 11, 12, on-off valve support plate 13, four-way switching valve 16, electronic expansion valves 17, 18, fan 27, bypass circuit 30, internal frame 60, internal heat exchange support base 70, accumulator support bases 31, 32, etc. ing.

  The outdoor unit casing 2 includes the compression mechanism 3, the outdoor heat exchanger 4, the internal heat exchanger 6, the accumulator 9, the electromagnetic open / close valves 11 and 12, the four-way switching valve 16, the electronic expansion valves 17 and 18, and the internal frame 60. A casing that accommodates the internal heat exchange support base 70, the accumulator support bases 31, 32, etc. therein, the top plate 21, the front panel 25, the left side panel 22, the back panel 23, the right side panel 24, and The bottom plate 26 is provided and has a substantially rectangular parallelepiped shape. The top plate 21 covers the top surface of the outdoor unit 1 and is formed with a substantially circular air outlet 21a that opens in the vertical direction. The fan 27 is arranged so that the axial direction in which the rotating shaft 27a extends is parallel to the plate thickness direction (opening direction) of the air outlet 21a, and the substantially circular center of the air outlet 21a is the axis. It is arranged to be. The front panel 25 covers substantially the entire front portion of the outdoor unit 1. The left side panel 22 covers the left side of the outdoor unit 1 and has a plurality of suction ports 22a penetrating in the thickness direction. The back panel 23 covers the back surface of the outdoor unit 1 and has a plurality of suction ports (not shown) penetrating in the plate thickness direction. The right side panel 24 covers the right side of the outdoor unit 1 and has a plurality of suction ports (not shown) penetrating in the thickness direction. Thereby, when the fan 27 is driven to rotate, outdoor air is sucked from the suction port 22a of the left side panel 22, the suction port of the back panel 23, and the suction port (not shown) of the right side panel 24. The air passes through the outdoor unit casing 2 and is blown out upward through the air outlet 21a of the top plate 21. The bottom plate 26 is a plate that covers the bottom portion of the outdoor unit 1 and serves as a base for supporting the components of the outdoor unit 1.

  The compression mechanism 3 is a device that compresses carbon dioxide as a working refrigerant, and two units of a first compressor 3a and a second compressor 3b are arranged in parallel. As shown in FIG. 5, the first compressor 3a and the second compressor 3b are both scroll compressors, and are arranged in parallel so that the rotation axis direction is substantially vertical. . As shown in FIG. 5, both the first compressor 3a and the second compressor 3b are arranged at positions that do not overlap with the accumulator 9 in plan view.

  The outdoor heat exchanger 4 exchanges heat between carbon dioxide as a working refrigerant and outdoor air supplied by the fan 27. The outdoor heat exchanger 4 is connected to a header 4a that branches and merges the refrigerant flow. Although the internal heat exchanger 6 to be described later is arranged inside the outdoor heat exchanger 4, the air flow formed by the fan 27 is guided upward, so that the internal heat exchanger 6 is connected to the outdoor unit casing. 2 and the outdoor heat exchanger 4 are arranged on the inner side to prevent the ventilation resistance from increasing.

  The internal heat exchanger 6 has a plurality of heat exchange pipes 5 that are bent into a plurality of S shapes. Further, the internal heat exchanger 6 has a liquid pipe 7 and a gas pipe 8 arranged inside the heat exchange pipe 5. The liquid pipe 7 is supplied with a high-temperature refrigerant (a refrigerant in a liquid state or a gas-liquid two-phase state) that has been discharged from the compression mechanism 3 and has not yet been sent to the indoor unit (not shown) on the use side. . The gas pipe 8 is supplied with a low-temperature refrigerant (a gas-state refrigerant) that has returned from the indoor unit on the use side and has not yet been sucked into the compression mechanism 3. The liquid pipe 7 and the gas pipe 8 are in contact with each other on the outer surface, and heat exchange can be performed between the refrigerant flowing through the liquid pipe 7 and the refrigerant flowing through the gas pipe 8. ing. Here, the gas pipe 8 is provided so as to extend straight. The liquid pipe 7 is wound in such a manner that the four divided pipes are in spiral contact with the gas pipe 8 in a state where the liquid pipe 7 is divided into four. By exchanging heat between the refrigerant flowing through the liquid pipe 7 and the refrigerant flowing through the gas pipe 8, it becomes possible to give the refrigerant sucked into the compression mechanism 3 an appropriate degree of superheat.

  The accumulator 9 is a device for separating the liquid refrigerant from the refrigerant before being sucked into the compression mechanism 3 so that only the vapor refrigerant is supplied to the compression mechanism 3. The accumulator 9 has a substantially cylindrical shape and a shape in which the axial direction is the longitudinal direction. The accumulator 9 is arranged vertically downward with respect to the internal heat exchanger 6 described above while the axial direction is substantially parallel to the surface of the bottom plate 26. That is, the weight of the internal heat exchanger 6 is arranged so as to be applied to the accumulator 9 via an internal frame body 60 and an internal heat exchanger support 70 which will be described later. Here, since carbon dioxide is used as the working refrigerant, the accumulator 9 is carbon dioxide that is required to have higher pressure resistance, which is stricter than the pressure test conditions of R-22, which has been conventionally used. It passed the pressure resistance test of the refrigerant, and the wall surface is made thicker. Specifically, carbon dioxide is used as a working refrigerant, and the pressure test under the high pressure gas safety method under a situation where the design pressure is 12.3 MPa is passed. The accumulator 9 here is made of copper, an alloy thereof, or the like, and the thickness of the wall surface is necessary to pass the pressure resistance test. Even if the design pressure is other pressure of 10.0 MPa or more, the effects of the present invention can be sufficiently obtained.

  The electromagnetic on-off valves 11 and 12 include a first electromagnetic on-off valve 11 and a second electromagnetic on-off valve 12. Both the electromagnetic on-off valve 11 and the electromagnetic on-off valve 12 are fixed to the on-off valve support plate 13. The electromagnetic on-off valves 11 and 12 here are fixed by being screwed to the on-off valve support plate 13.

  The on-off valve support plate 13 is screwed to the internal frame 60 fixed to the accumulator 9 and the internal heat exchanger 6 which are heavy objects. The first electromagnetic on-off valve 11 and the second electromagnetic on-off valve 12 are fixed by being screwed to the on-off valve support plate 13.

  The four-way switching valve 16 is a device for switching the refrigerant flow in the refrigeration cycle, and uses a refrigerant flow state in which the outdoor heat exchanger 4 is used as a refrigerant heater, and uses the outdoor heat exchanger 4 as a refrigerant radiator. Can be switched between each other.

  The electronic expansion valves 17 and 18 depressurize the refrigerant that passes therethrough.

  As shown in FIG. 6, the bypass circuit 30 includes a first low-pressure side pipe 38, a second low-pressure side pipe 39, a first high-pressure side pipe 48, and a second high-pressure side pipe 49. The first low pressure side pipe 38 and the second low pressure side pipe 39 are connected to the suction side of the compression mechanism 3 described above. The first high-pressure side pipe 48 and the second high-pressure side pipe 49 are connected to the discharge side of the compression mechanism 3 described above. These pipes 38, 39, 48, 49 are formed of copper or an alloy containing copper. The first low pressure side pipe 38 and the first high pressure side pipe 48 are connected via the first electromagnetic on-off valve 11. The second low pressure side pipe 39 and the second high pressure side pipe 49 are connected via the second electromagnetic on-off valve 12. In this refrigerant circuit, the first electromagnetic on-off valve 11 and the second electromagnetic on-off valve 12 are controlled to open and close according to the load status of the refrigeration cycle. Specifically, pressure equalization control and startup control are performed. Here, the pressure equalization control means that when the first compressor 3a or the second compressor 3b is stopped, the pressure difference between the discharge side and the suction side of the stop compressor may increase. In order to solve this problem, the high-pressure gas on the discharge side is bypassed to the low-pressure gas on the suction side. The start-up control means that when at least one of the first compressor 3a and the second compressor 3b is started in a state where the outside air temperature is lower than a predetermined temperature, the pressure of the low-pressure gas on the suction side is In order to prevent this from happening, the bypass circuit 30 is temporarily opened when the compressor is started.

  The inner frame 60 is fixed to the pipe so as to fix the positions of the pipes while covering the periphery of the internal heat exchanger 6 described above.

  The internal heat exchange support base 70 is fixed to the accumulator 9 while being fixed to the internal frame 60. As shown in FIG. 4, the internal heat exchange support base 70 has support frames 73 and 74 provided on one end side and the other end side of the accumulator 9 in order to support the accumulator 9. And the support frame 73 has the protrusion 73a for support stands. Further, the support frame 74 has a support stand projection 74a. These support base projections 73 a and 74 a are welded to the accumulator 9 so as to follow the shape of the cylindrical surface of the outer surface of the accumulator 9. Here, the support base projections 73a and 74a are not particularly limited to welding. For example, the support base projections 73a and 74a are fixed by being screwed, for example, by being provided with screw holes. Also good.

  The accumulator supports 31 and 32 are screwed to the bottom plate 26 and support the accumulator 9 in contact with the outer surface of the accumulator 9 so as to follow the shape of the cylinder side surface below the accumulator 9. .

  Here, the accumulator 9 is supported with respect to the bottom plate 26 by the accumulator support bases 31 and 32. An internal heat exchanger support 70 welded to the accumulator 9 supports an internal frame 60 that supports the internal heat exchanger 6. In this way, the weight of the internal heat exchanger 6 is arranged to be applied to the accumulator 9 via the internal frame 60 and the internal heat exchange support 70.

<1-2> Assembly of Internal Heat Exchanger and Internal Frame When assembling the internal heat exchanger 6 and the internal frame 60 described above, operations shown in FIGS. 7 to 12 are performed.

  FIG. 7 is a schematic perspective view showing a part of the inner frame.

  FIG. 8 is a schematic perspective view showing how the assembly elements are stacked.

  FIG. 9 is a schematic perspective view showing a state where the stacking of the assembly elements is finished.

  FIG. 10 is a schematic perspective view showing a state after the remaining portion of the inner frame is assembled.

  FIG. 11 is a schematic front view showing the positional relationship between the accumulator and the internal heat exchanger.

  FIG. 12 is a schematic perspective view showing the positional relationship between the accumulator and the internal heat exchanger.

(Internal frame)
Here, as shown in FIGS. 7 to 10, the internal frame 60 is arranged around the internal heat exchanger 6, and has four frame pillars extending substantially parallel to the longitudinal direction of the internal heat exchanger 6. 61a, 61b, 66a, 66b. Here, the frame column 61a and the frame column 61b are integrated by being screwed to a reinforcing plate 61c provided near one end side in the longitudinal direction and a reinforcing plate 61d provided near the other end side, respectively. It has become. The four frame pillars 61a, 61b, 61c, 61d have screw holes for screwing together stacking guides 62, 63, 64, 65, which will be described later, and reinforcing plates 62s, 63s, 64s, 65s, respectively. (Not shown) is provided.

  Further, the stacking guide 62 extends from the end of the frame column 61a on the side where the reinforcing plate 61c is provided in the thickness direction of the reinforcing plate 61c. The stacking guide 62 is provided with a guide groove 62g extending in the longitudinal direction of the stacking guide 62 on the inner side (the frame column 61b side). Similarly, the stacking guide 63 extends from the end of the frame column 61b on the side where the reinforcing plate 61c is provided in the thickness direction of the reinforcing plate 61c. The stacking guide 63 is also provided with a guide groove 63g extending in the longitudinal direction of the stacking guide 63 on the inner side (the frame column 61a side). Further, stacking guides 64 and 65 extending between the reinforcing plate 61c and the reinforcing plate 61d and extending from the portion close to the reinforcing plate 61d in the thickness direction of the reinforcing plate 61d are screwed to the frame columns 61a and 61b, respectively. ing. The stacking guides 64 and 65 are respectively provided with guide grooves 64g and 65g extending in the longitudinal direction provided on opposite sides. These guide grooves 62g, 63g, 64g, and 65g are provided with screw holes (not shown) that penetrate the inside and the outside, respectively. The screw holes can be fixed by screwing guide claws 68a, 68c, 69a, 69c, which will be described later, and reinforcing plates 62s, 63s, 64s, 65s to the stacking guides 62, 63, 64, 65. It is provided as follows.

(Assembly element)
The internal heat exchanger 6 described above is formed by assembling a plurality of assembly elements 6a, 6b, 6c, 6d. These assembly elements 6a, 6b, 6c, and 6d are stacked while being guided by guide grooves 62g, 63g, 64g, and 65g, respectively, as shown in FIGS. 8 and 9, and the internal heat exchanger 6 and the internal frame are stacked. 60 is assembled.

  Here, as shown in FIG. 8, the assembly elements 6a, 6b, 6c, and 6d are assembled parts formed by welding a plurality of heat exchange pipes 5 to the element members 68 and 69. . Here, inside the heat exchange pipe 5, there are a gas pipe 8 and a liquid pipe 7 that is divided into four parts and spirally wound around the gas pipe 8. The element members 68 and 69 have welded portions 68b and 69b and guide claws 68a, 68c, 69a and 69c, respectively. The welded portion 68 is welded with the plurality of heat exchange pipes 5 described above. The guide claws 68a, 68c, 69a, and 69c correspond to the sizes of the corresponding guide grooves 62g, 63g, 64g, and 65g, respectively, and guide the guide elements when stacking the assembly elements 6a, 6b, 6c, and 6d. The claws 68a, 68c, 69a, and 69c are configured to be guided to predetermined positions by the guide grooves 62g, 63g, 64g, and 65g, respectively. The guide claws 68a, 68c, 69a, and 69c extend by a predetermined length, and a gap can be formed between the adjacent assembly elements 6a, 6b, 6c, and 6d in a stacked state. .

  The guide claws 68a, 68c, 69a, 69c are provided with screw holes (not shown) so as to penetrate the inner side and the outer side. The screw holes can fix the stacking guides 62, 63, 64, 65 and the later-described reinforcing plates 62s, 63s, 64s, 65s to the guide claws 68a, 68c, 69a, 69c by screwing them. It is provided so that it can.

(Internal frame assembly finish)
As described above, when stacking of the assembly elements 6a, 6b, 6c, and 6d is finished, the inner frame 60 is attached by attaching the frame columns 66a and 66b and the reinforcing plates 62s, 63s, 64s, and 65s as shown in FIG. Finalize. In addition, here, the operation | work which connects the assembly elements 6a, 6b, 6c, 6d with a U-shaped pipe is also performed, and the internal heat exchanger 6 is completed. These reinforcing plates 62s, 63s, 64s, and 65s are also provided with screw holes (not shown) for screwing the stacking guides 62, 63, 64, and 65 and the frame columns 61a, 61b, 66a, and 66b. It has been. These frame pillars 66a and 66b not only have a function of unitizing the assembly elements 6a, 6b, 6c and 6d constituting the internal heat exchanger 6 but also support the internal heat exchanger 6 at the time of installation. Has a leg function.

  First, the screw holes of the frame pillars 66a and 66b and the screw holes of the reinforcing plates 62s, 63s, 64s, and 65s are aligned and screwed to the bottom, and are integrated. The frame columns 66a, 66b and the reinforcing plates 62s, 63s, 64s, 65s are integrated, and the ends of the reinforcing plates 62s, 63s, 64s, 65s on the side opposite to the frame columns 66, 66b side are respectively provided. Screwed onto the frame columns 61a and 61b. The screw holes of the reinforcing plates 62s, 63s, 64s, and 65s are screwed to the guide claws 68a, 68c, 69a, and 69c and the stacking guides 62, 63, 64, and 65, respectively. As described above, the frame pillars 61a, 61b, 66a, 66b, the stacking guides 62, 63, 64, 65, the guide claws 68a, 68c, 69a, 69c, and the reinforcing plates 62s, 63s, 64s, 65s are integrated. As a result, the internal frame 60 is completed. Thereby, the internal heat exchanger 6 is supported and unitized by being surrounded by the internal frame 60 and being put together. As a result, the internal heat exchanger 6 and the internal frame 60 can be stabilized even when installed in the outdoor unit 1. Further, when the outdoor unit 1 is assembled, the internal heat exchanger 6 and the internal frame 60 are arranged in the outdoor unit casing 2 in an integrated state, so that the internal heat exchanger 6 is configured. The plurality of assembly elements 6a, 6b, 6c, 6d having the liquid pipe 7 and the gas pipe 8 and the four frame pillars 61a, 61b, 66a, 66b constituting the internal frame 60 are separated. Hateful. For this reason, since it can assemble, maintaining the state with which the internal heat exchanger 6 and the internal frame 60 were integrated, the assembly workability | operativity can be improved.

  The internal heat exchanger 6 and the internal frame 60 assembled in this way are fixed to the accumulator 9 via an internal heat exchange support base 70 as shown in the front view of FIG. 11 and the rear perspective view of FIG. The The weights of the internal heat exchanger 6 and the internal frame 60 are applied directly to the accumulator 9. Here, the accumulator 9 is fixed to the bottom plate 26 of the outdoor unit casing 2 via the accumulator supports 31 and 32.

<1-3> Features of First Embodiment In the outdoor unit 1 of the first embodiment, in addition to the outdoor heat exchanger 4, in the case where a large heat exchanger such as the internal heat exchanger 6 is further provided, the internal heat exchanger By arranging 6 in the outdoor heat exchanger 4 and adopting the upper blowing type, the installation area can be reduced while suppressing increase in ventilation resistance.

  In addition, since the unit composed of the internal heat exchanger 6 and the internal frame 60 is formed and disposed inside the outdoor unit 1, the assembling workability is improved.

  Furthermore, the space above the horizontally placed accumulator 9 can be effectively used as the installation space for the internal heat exchanger 6.

<2> Second Embodiment An outdoor unit 201 of the second embodiment further includes an internal frame fixture 80 in addition to the outdoor unit 1 of the first embodiment.

  In addition, about the part similar to 1st Embodiment among the outdoor units 201, it shows with the same member number as 1st Embodiment, and abbreviate | omits description.

  In FIG. 13, the external appearance perspective view about the one part internal structure of the outdoor unit 201 is shown.

  In FIG. 14, the top view about the one part internal structure of the outdoor unit 201 is shown.

  The outdoor heat exchanger 4 of the outdoor unit 201 is attached to one end in the longitudinal direction of the outdoor heat exchanger 4 in a top view, and the outdoor heat exchange first fixture 41 for stably fixing the outdoor heat exchanger 4. have. Moreover, the outdoor heat exchanger 4 is attached to the other end side opposite to the side having the outdoor heat exchange first fixture 41 in a top view, and stably fixes the outdoor heat exchanger 4. It has the outdoor heat exchange 2nd fixture 46 for this.

  The internal frame fixture 80 is a connecting member for fixing the internal frame 60 to the outdoor heat exchange first fixture 41 and the outdoor heat exchange second fixture 46, and is located on the right side in the front view of the outdoor unit 1. It has the 1st fixing tool 80a arrange | positioned and the 2nd fixing tool 80b arrange | positioned on the left side.

  The first fixing member 80a has a first frame portion 60a which is a position where the height position in the vertical direction which is the longitudinal direction of the inner frame 60 is higher than half and which is the right side in the front view of the front side of the inner frame 60. The outdoor heat exchanger first fixture 41 of the outdoor heat exchanger 4 is fixed.

  Specifically, the first fixture 80 a includes a first connecting portion 81, an outdoor heat exchange side end portion 82, and an inner frame side end portion 83.

  The first connecting portion 81 is a plate-like member having a surface that extends in a substantially vertical direction with respect to the bottom plate 26. Thus, since the 1st connection part 81 is arrange | positioned so that it may spread in a substantially perpendicular direction, even when providing the member which fixes the internal frame 60, it becomes difficult to become resistance with respect to the air flow which the fan 27 forms, The inner frame 60 can be fixed while suppressing an increase in ventilation resistance. The outdoor heat exchanger side end portion 82 fixes the first fixture 80 a to the outdoor heat exchanger fixed portion 41 a that is near the upper end in the substantially vertical direction that is the longitudinal direction of the outdoor heat exchanger first fixture 41. Part of the first fixing tool 80a. The outdoor heat exchanger side end portion 82 and the outdoor heat exchanger fixing portion 41a of the outdoor heat exchanger first fixture 41 are fixed by being screwed in two places at the top and bottom. The inner frame side end portion 83 is a first fixing tool 80a for fixing the first fixing tool 80a to the inner frame fixed part 60a in the vicinity of the upper end in the substantially vertical direction that is the longitudinal direction of the inner frame 60. And constitutes an end opposite to the outdoor heat exchange side end 82. The inner frame side end 83 and the inner frame fixed portion 60a of the inner frame 60 are fixed by being screwed in two places at the top and bottom. Here, since the longitudinal direction of the shape of the internal frame 60 is the vertical direction, the upper portion tends to be shaken with the lower end portion as a fixed end. On the other hand, the 1st fixing | fixed part 80a can reduce the amplitude of the shake of the internal frame 60 by employ | adopting the upper vicinity of the internal frame 60 as a fixed part, and suppresses a shake efficiently. Is able to.

  The second fixture 80b has a second connecting portion 86, an outdoor heat exchange side end 87, and an inner frame side end 88.

  The second connecting portion 86 is a plate-like member having a surface that extends in a substantially vertical direction with respect to the bottom plate 26. As described above, since the second connecting portion 82 is arranged so as to extend in the substantially vertical direction, similarly to the first connecting portion 81, the fan 27 is provided even when a member for fixing the internal frame 60 is provided. The internal frame 60 can be fixed while suppressing an increase in ventilation resistance, unlikely to become resistance to the air flow to be formed. In addition, since the internal frame 60 is arrange | positioned in the indoor unit casing 2 at the front view left side, the 2nd fixing tool 80b is formed in the longitudinal direction shorter than the 1st fixing tool 80a. Thereby, the distance between the outdoor heat exchange side end 87 which is one of the fixed ends of the second fixture 80b and the inner frame side end 88 which is another of the fixed ends of the second fixture 80b is set. The inner frame 60 can be fixed more stably on the second fixing tool 80b side than on the first fixing tool 80a side because it can be shortened compared to the first fixing tool 80a. Yes. The outdoor heat exchanger side end portion 87 fixes the second fixture 80b to the outdoor heat exchanger fixed portion 42b that is near the upper end in the substantially vertical direction that is the longitudinal direction of the outdoor heat exchanger second fixture 42. It is a part of the 2nd fixing tool 80b for. The outdoor heat exchanger side end portion 87 and the outdoor heat exchanger fixed portion 42b of the outdoor heat exchanger second fixture 42 are fixed by being screwed in two places at the top and bottom. The inner frame side end 88 is a second fixing tool 80b for fixing the second fixing tool 80b to the inner frame fixed part 60b in the vicinity of the upper end in the substantially vertical direction which is the longitudinal direction of the inner frame 60. And constitutes an end opposite to the outdoor heat exchange side end 87. The inner frame side end portion 88 and the inner frame fixed portion 60b of the inner frame 60 are fixed by being screwed in two places at the top and bottom. Here, since the longitudinal direction of the shape of the internal frame 60 is the vertical direction, the upper portion tends to be shaken with the lower end portion as a fixed end. On the other hand, the 2nd fixing | fixed part 80b can make the amplitude of the shaking of the internal frame 60 small by employ | adopting the upper vicinity of the internal frames 60 as a fixing | fixed part similarly to the 1st fixing tool 80a. It is possible to suppress the shaking efficiently. Further, the inner frame 60 includes an inner frame fixed portion 60a fixed to the inner frame side end 83 of the first fixing tool 80a and an inner frame target fixed to the inner frame side end 88 of the second fixing tool 80b. The height position of the fixed portion 60b is different. Thereby, the fixing structure of the internal frame 60 can be made a more stable structure. Here, not the first fixing tool 80a but the second fixing tool 80b whose length in the longitudinal direction is shorter than the first fixing tool 80a is fixed to the inner frame fixed portion 60a fixed to the first fixing tool 80a. A structure that is fixed to the lower inner frame fixed portion 60b is adopted.

  The angles formed by the longitudinal directions of the first fixing tool 80a and the second fixing tool 80b are arranged so as to be 90 degrees or more and 180 degrees or less, and here, they are set to approximately 90 degrees.

  In this way, by fixing the internal frame 60 using the internal frame fixture 80, it is possible to effectively suppress shaking of the internal heat exchanger 6 surrounded by the internal frame. Further, by adopting a structure that suppresses such shaking, the strength against dropping of the outdoor unit 201 can be improved.

  In addition, the assembling work of the outdoor unit 201 of the second embodiment is performed after the assembling of the internal heat exchanger and the inner frame described in the first embodiment, and further by the fixing work with the inner frame fixing tool 80 described above. Do.

  As shown in FIGS. 11 and 12, the fixing work by the internal frame fixing tool 80 is performed after the assembled internal heat exchanger 6 and the internal frame 60 are fixed to the accumulator 9 via the internal heat exchanger support 70. Done. That is, after all of the outdoor heat exchanger 4, the internal heat exchanger 6, and the internal frame 60 are fixed to the bottom plate 26 of the indoor unit casing 2, the internal frame fixture 80 is moved to the internal frame. The fixed portion of 60 and the fixed portion of the outdoor heat exchanger 4 are fixed in contact with each other.

(Evaluation of vibration resistance)
For the outdoor unit 201 of the second embodiment, a vibration evaluation test in which the acceleration is 9.8 m / s2, the vibration direction is the vertical direction, the frequency is 10 to 100 Hz, the cycle is 5 minutes, and the number of times is 30 times, evaluated.

  As an evaluation standard, it is necessary for the appearance not to be scratched, distorted, peeled off, loosened or dropped off. Parts are required to be able to operate without hindrance without contact, loosening, or falling off of piping, rotating parts, and other parts. With respect to refrigerant leakage, it is necessary that there is no refrigerant leakage (no damage or dropping off due to installation or operation).

  Since the outdoor unit 201 of the second embodiment has passed the above evaluation criteria, the vibration of the internal frame 60 and the internal heat exchanger 6 can be effectively suppressed.

  In addition, as a vibration evaluation test based on JIS standard, acceleration is 7.35 m / s2, vibration direction is vertical, frequency is 5 to 50 Hz or 5 to 100 Hz (selected according to the characteristics of the EUT), and excitation time is 20 hours. Even when the vibration evaluation test of 40 hours or 60 hours (selected according to the transport distance) was applied, the outdoor unit 201 of the second embodiment passed.

(Evaluation of drop resistance)
The outdoor unit 201 of the second embodiment was evaluated by applying a drop evaluation test of free fall, a drop height of 10 cm, and the number of drops of one.

  As an evaluation standard, it is necessary for the appearance not to be scratched, distorted, peeled off, loosened or dropped off. Parts are required to be able to operate without hindrance without contact, loosening, or falling off of piping, rotating parts, and other parts. Regarding refrigerant leakage, it is required that there is no refrigerant leakage. Regarding the operation, it is required that there is no abnormal vibration or noise in the air blowing operation after the test. Regarding the breakage of the cushioning material, it is necessary not to scatter.

  Since the outdoor unit 201 of the second embodiment has passed the above evaluation criteria, the internal frame 60 and the internal heat exchanger 6 can be secured against dropping and can improve the reliability of the device. become.

  In addition, as a JIS standard drop evaluation test, a single-supported drop is less than 50 kg, a free fall is 100 kg or more, a single-support drop is selected from 50 kg and less than 100 kg, and the drop height is 10 to 50 cm (level, weight) The outdoor unit 201 of the second embodiment passed even when a drop evaluation test was applied in which the number of drops was 2 times each (4 times in total).

<3> Third Embodiment The outdoor unit 301 of the third embodiment includes an internal frame fixture 380 for the purpose of suppressing the shaking of the internal heat exchanger 6 as with the outdoor unit 201 of the second embodiment. Yes.

  In addition, about the part similar to 2nd Embodiment among the outdoor units 301, it shows with the same member number as 2nd Embodiment, and abbreviate | omits description.

  FIG. 15 shows a top view of a part of the internal structure of the outdoor unit 301.

  The inner frame fixture 380 fixes the inner frame 60 to the left side panel 22 and the right side panel 24.

  The first inner frame fixture 380 a has a right side panel side end 382 that extends to the right side panel 24 of the outdoor unit casing 2 at the end opposite to the inner frame side end 83. The right side panel side end 382 is fixed by being screwed to the right side panel fixed portion 24 a of the right side panel 24 of the outdoor unit casing 2. The right side panel fixed portion 24a is located in the vicinity of the upper end portion of the right side panel 24 excluding the portion where the suction port is provided.

  Further, the second inner frame fixture 380 b has a left side panel side end portion 387 whose end opposite to the inner frame side end 88 extends to the left side panel 22 of the outdoor unit casing 2. Yes. The left side panel side end portion 387 is fixed by being screwed to the left side panel fixed portion 22 b of the left side panel 22 of the outdoor unit casing 2. The left side panel fixed portion 22b is located in the vicinity of the upper end portion of the left side panel 22 excluding the portion where the suction port 22a is provided.

  In this way, the internal frame 60 is fixed to the outdoor unit casing 2 by using the internal frame fixing tool 380, so that the stability of the internal frame 60 is improved and the internal heat exchange surrounded by the internal frame 60 is performed. The shaking of the vessel 6 can be effectively suppressed.

<4> Modifications As described above, the embodiments of the present invention have been described with examples. However, the present invention is not limited thereto, and various modifications as described below are possible without departing from the spirit of the invention. Is possible.

(1)
In the first to third embodiments, the outdoor unit 1 in which the internal heat exchanger 6 is disposed above the accumulator 9 has been described as an example.

  However, the present invention is not limited to this. For example, the heat exchanger disposed in the space above the accumulator 9 may be a supercooling heat exchanger or the like.

(2)
In the first to third embodiments, the arrangement in which the weights of the internal heat exchanger 6 and the internal frame 60 are applied to the accumulator 9 has been described as an example.

  However, the present invention is not limited to this. For example, the internal heat exchanger 6 is configured such that the lower end portion of the internal frame 60 is directly fixed to the upper surface side of the bottom plate 26 of the outdoor unit casing 2. It may be provided inside.

  In this case, the load due to the weight of the accumulator 9 and the weight of the internal heat exchanger 6 and the internal frame 60 with respect to the bottom plate 26 can be dispersed.

(3)
In the first to third embodiments, the case where the internal frame 60 integrally supports the internal heat exchanger 6 including the plurality of assembly elements 6a, 6b, 6c, and 6d has been described as an example.

  However, the present invention is not limited to this. For example, when one assembly element is sufficient as the capacity of the refrigeration cycle, only one assembly element may be used without using a plurality of assembly elements. In this case, the internal heat exchanger 6 including one assembly element may be integrally supported by the internal frame 60.

  Here, the internal frame 60 has the configuration shown in the above embodiment, and even if there is only one assembly element, the internal frame 60 is inserted through the screw holes provided in the guide claws 68a, 68c, 69a, 69c. The guide claws 68a, 68c, 69a, 69c and the stacking guides 62, 63, 64, 65 can be fixed by screwing together. For this reason, even when only one assembly element is supported or when a plurality of assembly elements are integrally supported, the same inner frame 60 can be used in combination.

(4)
In the first to third embodiments, the accumulator 9 is given as an example of a container that ensures pressure resistance when carbon dioxide is used as a working refrigerant, and the accumulator 9 is placed horizontally as an example. I gave it as an explanation.

  However, the present invention is not limited to this, and for example, a receiver or the like may be used as the container for ensuring the pressure resistance. About such a receiver, even if the thickness is designed to ensure pressure resistance and the weight may increase, the axial direction at the low position inside the outdoor unit casing 2 is the same as in the above embodiment. It can be arranged in a horizontal position substantially parallel to the surface of the bottom plate 26. As a result, it is also possible to stabilize the installation of the receiver and the internal heat exchanger 6 and the like by dispersing the weight load of the receiver per unit area on the bottom plate 26 as in the above embodiment.

  The internal heat exchanger 6 can be positioned in a space generated above the receiver, and the space can be used effectively. In this case, the outdoor unit 1 including the internal heat exchanger 6 can be made compact, and can be installed even when the horizontal area of the installation space is limited. Furthermore, the internal heat exchanger 6 can be supported by a heavy receiver via the internal heat exchanger support 70 and the internal frame 60. In this case, the installation of the internal heat exchanger 6 can be stabilized. it can.

  The outdoor unit of the air conditioning apparatus of the present invention and the manufacturing method thereof are not only a heat exchanger provided along the outer edge shape of the outdoor unit casing in the outdoor unit, but also when a separate heat exchanger is provided inside. Since the area in plan view in the installed state can be reduced, the compact outdoor unit including the outdoor heat exchanger and the internal heat exchanger is particularly useful.

It is a general | schematic external appearance perspective view of the outdoor unit of this embodiment. It is a schematic perspective view of the internal structure of an outdoor unit. It is a schematic perspective view which shows the arrangement | positioning relationship of an internal heat exchanger and an accumulator. It is a schematic perspective view of an accumulator and a support frame. It is a top view which shows the positional relationship of each structure in an outdoor unit casing. It is a schematic perspective view which shows arrangement | positioning of the periphery of an internal heat exchanger. It is a schematic perspective view which shows a part of internal frame. It is a schematic perspective view which shows a mode that an assembly element is stacked. It is a schematic perspective view which shows a mode that the stacking of the assembly element was completed. It is a schematic perspective view which shows the mode after the remaining part of an internal frame is assembled. It is a schematic front view which shows the arrangement | positioning relationship between an accumulator and an internal heat exchanger. It is a schematic perspective view which shows the arrangement | positioning relationship between an accumulator and an internal heat exchanger. It is an external appearance perspective view about some internal structures of the outdoor unit of 2nd Embodiment. It is a top view about some internal structures of the outdoor unit of 2nd Embodiment. It is a top view about some internal structures of the outdoor unit of 3rd Embodiment.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Outdoor unit casing 4 Outdoor heat exchanger 5 Heat exchange piping 6 Internal heat exchanger (pipe assembly)
6a, 6b, 6c, 6d Assembly element 7 Liquid pipe (first pipe)
8 Gas pipe (second pipe)
9 accumulator 11 first electromagnetic on-off valve 12 second electromagnetic on-off valve 13 on-off valve support plate (frame body extension support member)
15a Oil separator 16a Oil separator 21 Top plate (top surface)
21a Air outlet 22 Right side panel (right side part)
22a Suction port 23 Rear panel (rear part)
24 Right side panel (right side)
25 Front panel (front)
26 Bottom plate (bottom)
27 Fan (Blower)
27a Rotating shaft 38 First low-pressure side piping 39 Second low-pressure side piping 41 Outdoor heat exchange first fixture (first fixing portion)
46 Outdoor heat exchange second fixture (second fixture)
48 First high-pressure side piping 49 Second high-pressure side piping 60 Internal frame (frame body)
60a 1st frame part (1st frame part)
60b Second frame part (second frame part)
61a Frame pillar 61b Reinforcement plate 62, 63, 64, 65 Stacking guide (guide member)
66a Frame pillar 66b Reinforcement plate 68 Element member (guided member)
68a Guide claw 68b Welding portion 68c Guide claw 69 Element member (guided member)
69a Guide claw 69b Welding part 69c Guide claw 70 Internal heat exchange support base (support base)
80 Internal frame fixture (fixture)
80a 1st fixing tool 80b 2nd fixing tool 81 1st communication part 86 2nd communication part 201 Outdoor unit 301 Outdoor unit 380 Internal frame fixing tool (fixing tool)

Claims (21)

A method of manufacturing an outdoor unit (1) of an air conditioner installed outdoors,
Providing a plurality of heat exchange pipes (5) such that the first heat transfer pipe (7) and the second heat transfer pipe (8) are in contact with each other;
A plurality of assembly elements (6a, 6b, 6c, 6d) obtained by integrating the plurality of heat exchange pipes (5) and guided members (68a, 68b, 68c, 69a, 69b, 69c) are created. And steps to
A frame body (60) including guide members (62, 63, 64, 65) extending in a substantially vertical direction is arranged so that the guide members (62, 63, 64, 65) extend in a substantially vertical direction. And steps to
By guiding the guided members (68a, 68c, 69a, 69c) by the guide members (62, 63, 64, 65), each of the plurality of assembly elements (6a, 6b, 6c, 6d) is caused by its own weight. Creating an internal heat exchanger assembly (6, 60) by guiding it to a respective predetermined position;
Storing the internal heat exchanger assembly (6, 60) inside the outdoor unit casing (2) and the outdoor heat exchanger (4) such that the longitudinal direction is substantially vertical;
The manufacturing method of the outdoor unit (1) of an air conditioning apparatus provided with. A fixture (80) is used for at least one of the side frame (22, 23, 24) covering at least a part of the side surface of the outdoor unit casing (2) and the outdoor heat exchanger (4). Fixing the frame (60)
Further equipped with,
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of Claim 1. In the fixing step, the longitudinal direction of the internal heat exchanger (6) and the longitudinal direction of the frame (60) are set to a substantially vertical direction, and then the upper half portion of the frame (60) in the longitudinal direction Is fixed with the fixing tool (80),
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of Claim 2. In the fixing step, the connecting portions (81, 86) extending in the direction away from the fixing portion for the frame (60) of the fixing tool (80) have a width in the vertical direction rather than a width in the horizontal direction. Fixed in a larger state,
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of Claim 2 or 3. In the fixing step,
The first frame portion (60a) of the frame (60) is attached to at least one of the outdoor heat exchanger (4) and the side frame (22, 23, 24) of the outdoor unit casing (2). 1st fixing tool (80a) fixed with respect to 1 fixing | fixed part (41),
The side surface of the outdoor heat exchanger (4) or the outdoor unit casing (2) is a second frame portion (60b) other than the first frame portion (60a) in the frame (60). A second fixture (80b) for fixing to a second fixing portion (46) which is a portion other than the first fixing portion (41) of at least one of the frames (22, 23, 24);
Using,
Fixing the first frame part (60a) and the second frame part (60b) so that the height positions in the vertical direction are different;
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of any one of Claim 2 to 4. In the fixing step, the smaller one of the angles formed by the longitudinal direction of the first fixture (80a) and the longitudinal direction of the second fixture (80b) is 90 degrees or more and 180 degrees in plan view. Fix to be below,
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of Claim 5. The first heat transfer tube and the second heat transfer tube are in contact with each other by spirally winding the first heat transfer tube (8) around the second heat transfer tube (7).
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of any one of Claim 1 to 6. After each of the plurality of assembly elements (6a, 6b, 6c, 6d) is guided to its predetermined position by its own weight, the longitudinal direction of the internal heat exchanger assembly (6, 60) is substantially vertical. Prior to the installation state, a leg frame reinforcing member that functions as a leg of the internal heat exchanger assembly (6, 60) in the installation state while reinforcing the internal heat exchanger assembly (6, 60). 66a, 66b) are attached so that the guide function of the guide members (62, 63, 64, 65) is not exerted.
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of any one of Claim 1 to 7. In the step of creating the internal heat exchanger assembly (6, 60), the plurality of assembly elements (6a, 6b, 6c, 6d) and the frame (60) are integrated.
The manufacturing method of the outdoor unit (1) of the air conditioning apparatus of any one of Claim 1 to 8. An outdoor unit (1) of an air conditioner installed outdoors,
A substantially rectangular parallelepiped outdoor unit casing (2) having a bottom surface portion (26), a top surface portion (21), and side surface portions (22, 23, 24, 25);
An outdoor heat exchanger (4) disposed so as to cover at least a part of the side surface portions (22, 23, 24, 25);
A first heat transfer tube (7) disposed inside the outdoor unit casing (2) and having a substantially vertical direction as a longitudinal direction; a second heat transfer tube (8) in contact with the first heat transfer tube (7); An internal heat exchanger (6) for exchanging heat without mixing the refrigerant flowing through the first heat transfer tube (7) and the refrigerant flowing through the second heat transfer tube (8),
With
The internal heat exchanger (6) includes an assembly element (6a, 6b, 6c, 6d) formed by combining the second heat transfer tube (8) and the first heat transfer tube (7) and further bending. A support frame (60) capable of supporting one assembly element and capable of integrally supporting a plurality of the assembly elements ;
A fixture for fixing the frame (60) to at least one of the side surface portions (22, 23, 24, 25) of the outdoor heat exchanger (4) or the outdoor unit casing (2). (80),
The fixture (80) has connecting portions (81, 86) extending in a direction away from the fixing portion of the frame (60),
The connecting portion (81, 86) has a width in the vertical direction larger than a width in the horizontal direction.
Air conditioner outdoor unit (1). The longitudinal direction of the internal heat exchanger (6) and the longitudinal direction of the frame (60) are substantially vertical directions,
A part of the fixing tool (80) is fixed to a portion on the upper half side in the longitudinal direction of the frame (60).
The outdoor unit (1) of the air conditioning apparatus according to claim 10 . An outdoor unit (1) of an air conditioner installed outdoors,
A substantially rectangular parallelepiped outdoor unit casing (2) having a bottom surface portion (26), a top surface portion (21), and side surface portions (22, 23, 24, 25);
An outdoor heat exchanger (4) disposed so as to cover at least a part of the side surface portions (22, 23, 24, 25);
A first heat transfer tube (7) disposed inside the outdoor unit casing (2) and having a substantially vertical direction as a longitudinal direction; a second heat transfer tube (8) in contact with the first heat transfer tube (7); An internal heat exchanger (6) for exchanging heat without mixing the refrigerant flowing through the first heat transfer tube (7) and the refrigerant flowing through the second heat transfer tube (8),
With
The internal heat exchanger (6) includes an assembly element (6a, 6b, 6c, 6d) formed by combining the second heat transfer tube (8) and the first heat transfer tube (7) and further bending. A support frame (60) capable of supporting one assembly element and capable of integrally supporting a plurality of the assembly elements ;
A fixture for fixing the frame (60) to at least one of the side surface portions (22, 23, 24, 25) of the outdoor heat exchanger (4) or the outdoor unit casing (2). (80),
The fixture (80) is configured such that the first frame portion (60a) of the frame (60) is attached to the side frame (22, 23, 24) of the outdoor heat exchanger (4) or the outdoor unit casing (2). ) At least one of the first fixing portion (41) and a portion of the frame (60) other than the first frame portion (60a). The second frame body portion (60b) is replaced with the first fixed portion (41) of at least one of the side surface frames (22, 23, 24) of the outdoor heat exchanger (4) or the outdoor unit casing (2). ) And a second fixing part (80b) that is fixed to the second fixing part (46) that is a part other than
The first frame body part (60a) and the second frame body part (60b) have different height positions in the vertical direction.
Air conditioner outdoor unit (1). In plan view, the smaller one of the angles formed by the longitudinal direction of the first fixture (80a) and the longitudinal direction of the second fixture (80b) is 90 degrees or more and 180 degrees or less.
The outdoor unit (1) of the air conditioning apparatus according to claim 12 . The longitudinal direction of the internal heat exchanger (6) and the longitudinal direction of the frame (60) are substantially vertical directions,
A part of the fixing tool (80) is fixed to a portion on the upper half side in the longitudinal direction of the frame (60).
The outdoor unit (1) of the air conditioning apparatus according to claim 12 or 13 . The fixture (80) has connecting portions (81, 86) extending in a direction away from the fixing portion of the frame (60),
The connecting portion (81, 86) has a width in the vertical direction larger than a width in the horizontal direction.
The outdoor unit (1) of the air conditioning apparatus according to claim 12 or 13 . The first heat transfer tube (7) is spirally wound around the second heat transfer tube (8),
The outdoor unit (1) of the air conditioning apparatus according to any one of claims 10 to 15. Obtained by disposing the support frame (60) and the plurality of assembly elements (6a, 6b, 6c) on the bottom surface portion (26) of the outdoor unit casing in an integrated state.
The outdoor unit (1) of the air conditioning apparatus according to any one of claims 10 to 16. A pressure-resistant refrigerant container (9) having a pressure-resistant strength when using at least a working refrigerant in a refrigeration cycle, and further constituting a part of the refrigeration cycle;
At least a part of the plurality of assembly elements (6a, 6b, 6c) is located at least vertically above the pressure-resistant refrigerant container (9).
The outdoor unit (1) of the air conditioning apparatus according to any one of claims 10 to 16. The pressure-resistant refrigerant container (9) has a substantially cylindrical shape whose axial direction is the longitudinal direction, and is disposed so that the longitudinal direction is substantially parallel to the surface of the bottom surface portion (26). ,
The outdoor unit (1) of the air conditioning apparatus according to claim 18. It has a pressure resistance strength when using at least a working refrigerant in a refrigeration cycle, and has a substantially cylindrical shape in which the axial direction is a longitudinal direction, so that the longitudinal direction is substantially parallel to the bottom surface portion (26). Further comprising a pressure-resistant refrigerant container (9) disposed on the upper surface side of the bottom surface portion (26) and constituting a part of the refrigeration cycle,
The integrated support frame (60) and the plurality of assembly elements (6a, 6b, 6c) directly apply their own weight to the pressure-resistant refrigerant container (9) while straddling the shaft of the pressure-resistant refrigerant container (9). Obtained by arranging
The outdoor unit (1) of the air conditioning apparatus according to any one of claims 10 to 16. The pressure-resistant refrigerant container (9) is at least one of a receiver and an accumulator.
The outdoor unit (1) of the air conditioning apparatus according to any one of claims 10 to 20.

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