Refrigerant flow path module, refrigeration cycle device, and method for manufacturing refrigeration cycle device

Abstract

A refrigerant flow path module is provided with: a module main body (11) having a plurality of plates (71, 72) made of stainless steel; and a first connection pipe (12a) which is connected to the module body (11) and which is made of a material having copper as the main component, the module body (11) having: a first surface (11a) which is disposed at one end of the plurality of plates (71, 72) in the stacking direction and in which a first opening (73) is formed, and a second surface (11b) which is disposed at the other end of the plurality of plates (71, 72) in the stacking direction; the first connection pipe (12a) has a linear pipe axis, and one end of the first connection pipe (12a) in the pipe axis direction is inserted into the first opening (73) and connected to the module body (11). A connected surface (13) to which a refrigerant pipe (P) formed of a material mainly composed of copper is connected is provided on the outer peripheral surface of the other end of the first connection pipe (12a) in the axial direction of the pipe, and the length of the first connection pipe (12a) is 25 mm or more and less than 56 mm.

Description

Technical Field

[0001] The present disclosure relates to a refrigerant flow path module, a refrigeration cycle device, and a method for manufacturing the refrigeration cycle device. Background Art

[0002] For example, as shown in Patent Document 1, it is known that in a refrigeration device including a refrigerant circuit that performs a vapor compression refrigeration cycle operation, a plurality of refrigerant pipes for the flow of refrigerant are gathered into one module (refrigerant flow path module) to seek miniaturization of the refrigerant circuit. The module includes a module body having a plurality of stacked stainless steel plates and having a refrigerant flow path formed therein, and a copper connecting pipe connected to an end face of the pipe body in the stacking direction of the plurality of plates.

[0003] For example, Fig.12 As shown, one end of the connecting pipe 112 is inserted into the opening 121a formed in the plate 121 of the module body 111 and connected to the module body 111, and the other end thereof has a large diameter portion 112a obtained by expanding the diameter. The copper refrigerant pipe 101 is inserted into the large diameter portion 112a, and the inner peripheral surface (connected surface) of the large diameter portion 112a is connected to the outer peripheral surface of the refrigerant pipe 101 by a brazing material B. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent Application Publication No. 2022-116694 Summary of the invention Technical problem to be solved by the invention

[0005] like Fig.12 As shown, in the refrigerant flow path module of patent document 1, when the connecting pipe 12 and the refrigerant piping 101 are brazed, the brazing material B that penetrates between the two sometimes flows further downward and reaches the plate 122. Since the plate 122 is made of stainless steel, the brazing material B used to join the coppers to each other is difficult to adhere to and is easy to peel off after cooling and solidification. If the peeled brazing material B enters the refrigerant circuit through the flow path in the refrigerant flow path module, it may hinder the operation of the compressor, valve, etc. that constitute the refrigerant circuit. Therefore, the refrigerant flow path module of patent document 1 is designed to ensure the length of the connecting pipe 112 to a certain extent, especially the length L1 of the part below the large diameter portion 112a, so that even if the brazing material B flows downward, it will stop before reaching the plate 122.

[0006] An object of the present disclosure is to suppress the inflow of a brazing material for joining a connection pipe and a refrigerant pipe in a refrigerant flow path module into a module body made of stainless steel. Technical solutions adopted to solve technical problems

[0007] (1) The refrigerant flow path module disclosed in the present invention comprises: a module body having a plurality of stacked stainless steel plates and having a refrigerant flow path formed therein; and a first connecting pipe, the first connecting pipe being formed of a material having copper as a main component and being connected to the module body, The module body has a first surface and a second surface, the first surface being arranged at one end in the stacking direction of the plurality of plates and having a first opening, and the second surface being arranged at the other end in the stacking direction. The first connecting pipe has a straight pipe axis. One end portion of the first connecting pipe in the pipe axial direction is connected to the module body in a state where the first connecting pipe is inserted into the first opening. The connected surface to which the refrigerant pipe formed of a material mainly composed of copper is connected is provided on the outer peripheral surface of the other end portion in the tube axial direction of the first connecting pipe. The length of the first connecting pipe is greater than or equal to 25 mm and less than or equal to 56 mm.

[0008] The refrigerant flow path module of this structure has a connected surface provided on the outer peripheral surface of the first connecting pipe, and even if the length of the first connecting pipe is less than 56 mm, the brazing material connecting the two can be prevented from reaching the module body made of stainless steel. By setting the length of the first connecting pipe to be more than 25 mm, a space for heating the first connecting pipe can be ensured between the module body and the refrigerant piping.

[0009] (2) The refrigerant flow path module of (1) above further includes a second connecting pipe having a straight pipe axis and formed of a material having copper as a main component, A second opening is formed on the second surface of the module body, One end portion of the second connecting pipe in the pipe axial direction is connected to the module body in a state where the second connecting pipe is inserted into the second opening. The connected surface to which the refrigerant pipe formed of a material mainly composed of copper is connected is provided at the other end portion in the tube axial direction of the second connecting pipe. The length of the second connecting pipe is greater than or equal to 25 mm and less than 56 mm.

[0010] According to this structure, similarly to the first connecting pipe, by providing a connected surface on the outer peripheral surface of the second connecting pipe, even if the length of the second connecting pipe is less than 56 mm, the brazing material connecting the two can be prevented from reaching the module body made of stainless steel. By setting the length of the second connecting pipe to be more than 25 mm, a space for heating the second connecting pipe can be ensured between the module body and the refrigerant piping.

[0011] (3) The refrigeration cycle device of the present disclosure includes: the refrigerant flow path module described in (1) above; and A refrigerant pipe joined to a connected surface of the first connecting pipe of the refrigerant flow path module.

[0012] According to the refrigeration cycle device having the above configuration, it is possible to suppress the brazing material connecting the first connecting pipe and the refrigerant pipe from reaching the module body and entering the components constituting the refrigeration cycle device from the module body.

[0013] (4) The refrigeration cycle device of the present disclosure includes: the refrigerant flow path module described in (2) above; a first refrigerant pipe joined to a connected surface of a first connecting pipe of the refrigerant flow path module; and A second refrigerant pipe is joined to a connected surface of the second connecting pipe of the refrigerant flow path module.

[0014] According to the refrigeration cycle device having the above structure, the brazing material connecting the first connecting pipe and the first refrigerant pipe and the brazing material connecting the second connecting pipe and the second refrigerant pipe can be prevented from reaching the module body and entering the components constituting the refrigeration cycle device from the module body.

[0015] (5) The manufacturing method of the refrigeration cycle device of the present disclosure is the manufacturing method of the refrigeration cycle device described in (3) above, comprising: A first step, in which the other end of the first connecting pipe of the refrigerant flow path module is inserted into the inner side of the refrigerant pipe; and A second step in which an inner peripheral surface of the refrigerant pipe is brazed to a connected surface of the first connecting pipe.

[0016] (6) In the manufacturing method of (5) above, the second step is performed with the first surface of the module body of the refrigerant flow path module facing downward.

[0017] According to this configuration, the first connecting pipe and the refrigerant pipe are joined by downward brazing, and the brazing material that has penetrated between the first connecting pipe and the refrigerant pipe does not reach the module body located above the refrigerant pipe even if it flows further downward.

[0018] (7) The manufacturing method of the refrigeration cycle device of the present disclosure is the manufacturing method of the refrigeration cycle device described in (4) above, comprising: A first step, in which the other end of the first connecting pipe of the refrigerant flow path module is inserted into the inside of the first refrigerant pipe; a second step, in which the inner peripheral surface of the first refrigerant pipe is brazed to the connected surface of the first connecting pipe in a state where the first surface of the module body of the refrigerant flow path module faces downward; a third step of inserting the other end of the second connecting pipe of the refrigerant flow path module into the inner side of the second refrigerant pipe; and A fourth step includes brazing the inner peripheral surface of the second refrigerant pipe to the connected surface of the second connecting pipe in a state where the second surface of the module body faces downward.

[0019] According to this structure, the first connecting pipe is joined to the first refrigerant pipe and the second connecting pipe is joined to the second refrigerant pipe by downward brazing, and the brazing material that has penetrated between the first connecting pipe and the refrigerant pipe will not reach the module body located above the refrigerant pipe even if it flows further downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram showing a refrigerant circuit of the refrigeration cycle device according to the first embodiment of the present disclosure. Figure 2 It is a perspective view showing a refrigeration cycle device. Figure 3 It is a top view showing the interior of the refrigeration cycle device. Figure 4 It is a three-dimensional view of the refrigerant flow path module and the components connected thereto. Figure 5 It is a schematic side view of the refrigerant flow path module and the components connected thereto. Figure 6 It is a schematic side view (partial cross-sectional view) of the refrigerant flow path module. Figure 7 This is a cross-sectional view showing an enlarged view of the refrigerant flow path module and the flow path switching valve. Figure 8 This is a diagram for explaining the procedure of connecting the refrigerant flow path module and the flow path switching valve. Fig. 9 This is a diagram for explaining the procedure of connecting the refrigerant flow path module and the flow path switching valve. Fig. 10A This is a cross-sectional view showing an example in which the refrigerant flow path block and the flow path switching valve are brazed downward. Fig. 10B This is a cross-sectional view showing an example in which the refrigerant flow path block and the flow path switching valve are brazed upward. Fig.11 This is a cross-sectional view showing an enlarged view of a joint portion between a refrigerant flow path module and a flow path switching valve according to the second embodiment. Fig.12 This is an enlarged cross-sectional view showing a state in which a refrigerant flow path module and a flow path switching valve in the related art are connected. Fig.13 This is an image showing a state in which the brazing material flows downward in the conventional technology. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. [First embodiment] Figure 1 It is a schematic diagram showing a refrigerant circuit of the refrigeration cycle device according to the first embodiment of the present disclosure. The refrigeration cycle device 1 includes a refrigerant circuit that performs a vapor compression refrigeration cycle operation. The refrigeration cycle device 1 of this embodiment is an air conditioner. Figure 1 As shown, the air conditioner 1 has an outdoor unit (heat source unit) 31, a plurality of indoor units (utilization units) 32, and a flow path switching device 33. The outdoor unit 31 and the flow path switching device 33, and the flow path switching device 33 and the indoor unit 32 are connected by connecting pipes 34, 35, 36, 37, and 38, respectively. The air conditioner 1 of this embodiment enables the plurality of indoor units 32 to independently implement cooling and heating, and is set to a so-called cold and hot free type (Japanese: cold and hot free time). In addition, the refrigeration cycle device 1 is not limited to an air conditioner, and can also be a refrigerator, a freezer, a water heater, etc.

[0022] (Refrigerant circuit structure) The outdoor unit 31 includes a refrigerant circuit 30. The refrigerant circuit 30 is connected to the refrigerant circuit in the flow switching device 33 through a liquid communication pipe 34, a suction gas communication pipe 35, and a high-low pressure gas communication pipe 36. The refrigerant circuit of the flow switching device 33 is connected to the refrigerant circuit in the indoor unit 32 through communication pipes 37 and 38.

[0023] The refrigerant circuit 30 includes a first stop valve 39a, a second stop valve 39b, a third stop valve 39c, a compressor 40, a storage tank 41, a plurality of flow path switching valves (switching mechanisms) 42 (42a, 42b, 42c), an outdoor heat exchanger 43, a plurality of expansion valves 44 (44a, 44b, 44c, 44d), a subcooler 45, an oil separator 46, etc., and is configured by connecting these components via refrigerant piping. A fan 62 is provided in the outdoor unit 31 (see Figure 2 ), controller 61a (refer to Figure 3 )wait.

[0024] One end of the first stop valve 39a is connected to the suction gas communication pipe 35. The other end of the first stop valve 39a is connected to a refrigerant pipe extending to the accumulator 41.

[0025] One end of the second stop valve 39b is connected to the high-low pressure gas communication pipe 36. The other end of the second stop valve 39b is connected to a refrigerant pipe extending to the flow path switching valve 42b. One end of the third stop valve 39c is connected to the liquid communication pipe 34. The other end of the third stop valve 39c is connected to a refrigerant pipe extending to the subcooler 45.

[0026] The compressor 40 has a closed structure with a compressor motor built in, and is a positive displacement compressor such as a scroll type or a rotary type. The compressor 40 compresses the low-pressure refrigerant sucked from the suction pipe 47 and discharges it from the discharge pipe 48. Refrigeration oil is stored inside the compressor 40. The refrigeration oil sometimes circulates in the refrigerant circuit 30 together with the refrigerant. The compressor 40 is a type of container.

[0027] The oil separator 46 is a container for separating refrigeration oil from the refrigerant discharged from the compressor 40. The separated refrigeration oil is returned to the compressor 40 through the oil return pipe 46a.

[0028] The storage tank 41 is a container for temporarily storing the low-pressure refrigerant sucked into the compressor 40 and separating the gas refrigerant from the liquid refrigerant. The inlet 41b of the storage tank 41 is connected to the refrigerant piping extending from the first stop valve 39a. The outlet 41a of the storage tank 41 is connected to the suction piping 47. One end of the return oil pipe 50 is connected to the storage tank 41. The other end of the return oil pipe 50 is connected to the suction piping 47. The return oil pipe 50 is a pipe for returning the refrigeration oil from the storage tank 41 to the compressor 40. The first opening and closing valve 51 is provided on the return oil pipe 50. The first opening and closing valve 51 is composed of a solenoid valve. If the first opening and closing valve 51 is opened, the refrigeration oil in the storage tank 41 passes through the return oil pipe 50 and is sucked into the compressor 40 together with the refrigerant flowing in the suction piping 47.

[0029] Each flow path switching valve 42 is a four-way switching valve and switches the flow of the refrigerant according to the operating conditions of the air conditioner 1. A refrigerant pipe extending from the oil separator 46 is connected to one refrigerant inlet of each flow path switching valve 42.

[0030] Each flow path switching valve 42 is configured to block the flow of refrigerant in one refrigerant flow path during operation, and actually functions as a three-way valve. Hereinafter, the plurality of flow path switching valves 42 are also referred to as a first flow path switching valve 42a, a second flow path switching valve 42b, and a third flow path switching valve 42c.

[0031] Each expansion valve 44 is, for example, an electric valve whose opening can be adjusted. The opening of each expansion valve 44 is adjusted according to the operating conditions, and the refrigerant passing through the inside is decompressed according to the opening. Hereinafter, the plurality of expansion valves 44 are also referred to as a first expansion valve 44a, a second expansion valve 44b, a third expansion valve 44c, and a fourth expansion valve 44d.

[0032] The outdoor heat exchanger 43 is a cross-fin type or microchannel type heat exchanger. The outdoor heat exchanger 43 includes a first heat exchange portion 43a, a second heat exchange portion 43b, a third heat exchange portion 43c, and a fourth heat exchange portion 43d. The gas side end of the first heat exchange portion 43a is connected to a refrigerant pipe extending to the third flow path switching valve 42c. The liquid side end of the first heat exchange portion 43a is connected to a refrigerant pipe extending to the first expansion valve 44a.

[0033] The gas side end of the second heat exchanger 43b is connected to a refrigerant pipe extending to the first flow path switching valve 42a. The liquid side end of the second heat exchanger 43b is connected to a refrigerant pipe extending to the second expansion valve 44b.

[0034] The gas side ends of the third heat exchanger 43c and the fourth heat exchanger 43d are connected to refrigerant pipes branching from the oil separator 46. The liquid side ends of the third heat exchanger 43c and the fourth heat exchanger 43d are connected to refrigerant pipes extending to the third expansion valve 44c.

[0035] The subcooler 45 has a first heat transfer tube 45a and a second heat transfer tube 45b. One end of the first heat transfer tube 45a is connected to the refrigerant piping extending to the first expansion valve 44a, the second expansion valve 44b, and the third expansion valve 44c. The other end of the first heat transfer tube 45a is connected to the refrigerant piping extending to the third stop valve 39c. One end of the second heat transfer tube 45b is connected to the first branch pipe 53 branched from the refrigerant piping between the first heat transfer tube 45a and the first expansion valve 44a, the second expansion valve 44b, and the third expansion valve 44c. The fourth expansion valve 44d is provided in the first branch pipe 53. The other end of the second heat transfer tube 45b is connected to one end of the injection piping 55. The other end of the injection piping 55 is connected to the middle port of the compressor 40.

[0036] One end of a second branch pipe 56 is connected to the injection pipe 55. The other end (outlet end) of the second branch pipe 56 is connected to the suction pipe 47. The second branch pipe 56 is provided with a second opening and closing valve 57 and a check valve 58. The second opening and closing valve 57 is composed of a solenoid valve.

[0037] The subcooler 45 performs heat exchange between the refrigerant flowing in the first heat transfer pipe 45a from the compressor 40 through the outdoor heat exchanger 43 and the expansion valve 44 and the refrigerant flowing in the second heat transfer pipe 45b after being decompressed by the expansion valve 44d, thereby subcooling the refrigerant flowing in the first heat transfer pipe 45a. The refrigerant flowing in the second heat transfer pipe 45b passes through the injection pipe 55 and is sucked into the middle port of the compressor 40. If the second on-off valve 57 is opened, the refrigerant flowing through the injection pipe 55 is branched and flows to the second branch pipe 56, and is sucked into the compressor 40 through the suction pipe 47.

[0038] (Structure of outdoor unit) Hereinafter, the specific structure of the outdoor unit (heat source unit) 31 will be described. Figure 2 It is a perspective view showing a refrigeration cycle device. Figure 3 It is a top view showing the interior of the refrigeration cycle device. In addition, the description of the left-right direction, front-back direction, and up-down direction in the following description is based on Figure 2 as well as Figure 3 Specifically, in the following description, Figure 2 as well as Figure 3 The first direction indicated by the arrow X is set as the left-right direction, the second direction indicated by the arrow Y is set as the front-back direction, and the third direction indicated by the arrow Z is set as the up-down direction. However, the description of these directions is only an example and does not limit the present disclosure. For example, the first direction X can also be set as the front-back direction, and the second direction Y can be set as the left-right direction.

[0039] like Figure 2 as well as Figure 3 As shown, the outdoor unit 31 has a housing 60 , and components constituting a refrigerant circuit such as the compressor 40 , the accumulator 41 , the outdoor heat exchanger 43 , the oil separator 46 , an electrical component unit 61 , a fan 62 , etc. are housed in the housing 60 . The fan 62 is provided at the upper portion of the housing 60 .

[0040] The housing 60 is formed in a substantially rectangular parallelepiped shape. The housing 60 includes a bottom plate 63, a support 64, a top plate 65, and a front plate 66. The bottom plate 63 is formed in a quadrilateral shape when viewed from above. The support 64 is composed of a long strip member having a substantially L-shaped cross-section and being long in the vertical direction, and is installed at the four corners of the bottom plate 63.

[0041] The top plate 65 is formed in a substantially same quadrilateral shape as the bottom plate 63, and is arranged above the bottom plate 63 at intervals. The upper ends of the pillars 64 are mounted at the four corners of the top plate 65. A substantially quadrilateral vent is formed in the top plate 65, and a grille 65a is provided at the vent to prevent foreign matter from entering.

[0042] like Figure 3 As shown, an opening 60a for maintenance is formed on the front surface of the housing 60. The opening 60a is blocked by a front plate (front side plate) 66. By removing the front plate 66 from the housing 60, maintenance and replacement of components in the housing 60 can be performed through the opening 60a.

[0043] The compressor 40 , the storage tank 41 , the outdoor heat exchanger 43 , the oil separator 46 and other components are mounted on the bottom plate 63 of the housing 60 .

[0044] The outdoor heat exchanger 43 is arranged corresponding to (opposite to) three side surfaces of the housing 60. Specifically, the outdoor heat exchanger 43 is formed in a U-shape when viewed from above in a manner along the left side surface, the right side surface, and the rear side surface of the housing 60. A gas header 43e is provided at an end of one side of the outdoor heat exchanger 43, and a liquid header 43f is provided at an end of the other side. Inlet ports 60b for introducing external air are respectively formed on the left side surface, the right side surface, and the rear side surface of the housing 60.

[0045] The outdoor unit 31 is configured to take in air from the inlet 60 b of the casing 60 when driven by the fan 62 , exchange heat between the air and the outdoor heat exchanger 43 , and then blow the air upward from the upper portion of the casing 60 .

[0046] The compressor 40 is arranged at a substantially central position in the left-right direction X near the front surface of the housing 60. The electrical component unit 61 is arranged near the front surface of the housing 60 and adjacently arranged on the right side of the compressor 40. The storage tank 41 is arranged behind the compressor 40. The oil separator 46 is arranged on the left side of the storage tank 41. The electrical component unit 61 includes a controller 61a that controls the operation of the compressor 40, the valves 42, 44, the fan 62, etc.

[0047] (Structure of refrigerant flow path module) Figure 4 It is a three-dimensional view of the refrigerant flow path module and the components connected thereto. Figure 5 1 is a schematic side view of the refrigerant flow path module and components connected thereto. 2 is a schematic side view of the refrigerant flow path module. like Figure 2 to Figure 5 As shown, the outdoor unit 31 is provided with a refrigerant flow path module 10. The refrigerant flow path module 10 is a module (unit) constituting a part of the flow path of the refrigerant piping connecting the compressor 40, the storage tank 41, the flow path switching valve 42, the outdoor heat exchanger 43, the expansion valve 44, the oil separator 46 and other components. Specifically, the refrigerant flow path module 10 of this embodiment forms Figure 1 The refrigerant flow paths in the frame F1 and the frame F2 are indicated by the two-dot chain line.

[0048] The refrigerant flow path module 10 of the present embodiment includes an upper refrigerant flow path module 10A and a lower refrigerant flow path module 10B. The upper refrigerant flow path module 10A is formed Figure 1 The refrigerant flow path in the frame F1 of the lower refrigerant flow path module 10B is formed Figure 1 The refrigerant flow path in box F2.

[0049] Each of the upper refrigerant flow path block 10A and the lower refrigerant flow path block 10B includes a module body 11 having a flow path therein and a connection pipe (joint pipe) 12 attached to the module body 11 and communicating with the flow path in the module body 11 .

[0050] Figure 6 It is a schematic side view (partial cross-sectional view) of the refrigerant flow path module. The module body 11 is formed in a plate shape or a block shape. The module body 11 is constructed by stacking a plurality of plates 71, 72. The module body 11 is configured so that the stacking direction of the plurality of plates 71, 72 (the normal direction of each plate 71, 72) is oriented in the up-down direction (the third direction Z). Therefore, the module body 11 has an upper surface and a lower surface that are configured horizontally. The upper surface and the lower surface of the module body 11 are rectangular. The thickness of the module body 11 (the length in the up-down direction) is smaller than the length of the long side and the short side of the upper surface and the lower surface. Therefore, the module body 11 is formed in a flat shape. The module body 11 may not be configured to be strictly horizontal, for example, it may be inclined within a range of ±10° relative to the horizontal direction.

[0051] The plurality of plates 71 and 72 are made of stainless steel. The plates 71 and 72 of the present embodiment are formed of, for example, SUS304L. The plurality of plates 71 and 72 are joined to each other by brazing.

[0052] The plurality of plates 71, 72 include end plates 71 disposed at both ends of the stacking direction and intermediate plates 72 disposed between the end plates 71 on both sides. The module body 11 of the present embodiment includes three intermediate plates 72. An opening 73 for mounting the connecting pipe 12 is formed in the end plate 71. The opening 73 penetrates the end plate 71 in the up-down direction Z. The opening 73 is circular. An opening 74 constituting the flow path 15 is formed in the intermediate plate 72. The opening 74 penetrates the intermediate plate 72 in the up-down direction Z. The opening 74 is formed to be longer in the horizontal direction, or to be circular. The shape of the opening 74 is not particularly limited, and the shape is appropriately set according to the desired form of the flow path 15.

[0053] The connecting pipe 12 is a cylindrical body mounted on the upper and lower surfaces of the module body 11. The connecting pipe 12 is formed of a material having copper as a main component, such as copper (pure copper) or a copper alloy. The connecting pipe 12 is joined by brazing in a state of being inserted into the opening 73 of the module body 11. The connecting pipe 12 is connected to the refrigerant piping constituting the refrigerant circuit. The plurality of plates 71, 72 constituting the module body 11 of the refrigerant flow path module 10 are joined to the connecting pipe 12 by furnace brazing. In particular, the joining of the plate 71 and the connecting pipe 12 is the joining of different types of materials, such as stainless steel and copper, and therefore, furnace brazing is suitable.

[0054] like Figure 4 as well as Figure 5 As shown, the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B are arranged parallel to each other. Figure 3 As shown, the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B are arranged to overlap each other when viewed from above. When viewed from above, the area of ​​the upper refrigerant flow path module 10A is larger than the area of ​​the lower refrigerant flow path module 10B. The lower refrigerant flow path module 10B is roughly arranged within the projection area of ​​the upper refrigerant flow path module 10A in the vertical direction.

[0055] like Figure 3 As shown, the refrigerant flow path module 10 is arranged on the left side (the side in the first direction X) of the compressor 40 and the accumulator 41. The refrigerant flow path module 10 is arranged on the front side (the side in the second direction Y) of the oil separator 46. The refrigerant flow path module 10 of this embodiment is supported by the refrigerant piping via the components of the refrigerant circuit fixed to the bottom plate 63 of the housing 60. The lower refrigerant flow path module 10B is also supported by the upper refrigerant flow path module 10A via the refrigerant piping and the components of the refrigerant circuit.

[0056] like Figure 4 and Figure 5 As shown, the refrigerant pipe 21 extending from the refrigerant outlet 41a of the accumulator 41 and the refrigerant pipe 22 extending from the refrigerant inlet 41b are connected to the lower side of the upper refrigerant flow path module 10A. The accumulator 41 is mounted and fixed to a mounting member 67 provided on the bottom plate 63 of the housing 60 of the outdoor unit 31. The refrigerant pipes 21 and 22 are connected to the connecting pipe 12 provided on the lower surface of the module body 11 of the upper refrigerant flow path module 10A, and support the upper refrigerant flow path module 10A from below.

[0057] A refrigerant pipe 23 is further connected to the lower side of the upper refrigerant flow path block 10A. The refrigerant pipe 23 is ... Figure 1 ) extends from the first stop valve (gas stop valve) 39a at the inlet of the gas refrigerant. Figure 5 As shown, the first stop valve 39a is mounted and fixed to a mounting member 68 provided on the bottom plate 63. The refrigerant pipe 23 bends from the first stop valve 39a and extends upward, and its upper end is connected to the connection pipe 12 provided on the lower surface of the module body 11 of the upper refrigerant flow path module 10A.

[0058] The upper refrigerant flow path module 10A is supported from below by the refrigerant piping 21, the refrigerant piping 22, and the refrigerant piping 23, and is arranged to be spaced apart from the top of the bottom plate 63 of the shell 60. The refrigerant piping 21, the refrigerant piping 22, and the refrigerant piping 23 are all gas pipings for the flow of gas refrigerant. Compared with the liquid piping for the flow of liquid refrigerant, the gas piping has a larger pipe diameter and higher strength. Therefore, the upper refrigerant flow path module 10A is stably supported by the above-mentioned refrigerant piping 21, 22, and 23. The refrigerant piping 21 and the refrigerant piping 22 are connected to the storage tank 41 fixed to the shell 60, and the refrigerant piping 23 is connected to the first stop valve 39a fixed to the shell 60. Therefore, the upper refrigerant flow path module 10A is more stably supported by the refrigerant piping 21, 22, and 23 via the components 41 and 39a of the refrigerant circuit fixed to the shell 60.

[0059] like Figure 5 As shown, a refrigerant pipe 24 extending from the refrigerant inlet 40b of the compressor 40 is connected to the upper surface of the module body 11 of the upper refrigerant flow path module 10A. Therefore, the upper refrigerant flow path module 10A is also supported from above by the refrigerant pipe 24. The refrigerant pipe 24 is a gas pipe for the flow of gas refrigerant, and has a larger diameter and higher strength than a liquid pipe. Therefore, the upper refrigerant flow path module 10A is stably supported by the refrigerant pipe 24. The compressor 40 is fixed via a mounting member or the like provided on the bottom plate 63 of the housing. Therefore, the upper refrigerant flow path module 10A is more stably supported by the refrigerant pipe 24 via the compressor 40 fixed to the bottom plate 63.

[0060] A flow path switching valve 42b is connected to the upper side of the upper refrigerant flow path module 10A. The flow path switching valve 42b has a shell H with a built-in valve core and a plurality of ports P as the inlet and outlet of the refrigerant relative to the shell H. Port P is a short tube (refrigerant piping) protruding upward and downward from the shell H. Port P is formed of a material with copper as the main component, such as copper (pure copper) or a copper alloy. The port P protruding to the lower side of the shell H is directly connected to the connecting pipe 12 provided on the upper part of the upper refrigerant flow path module 10A. The port P protruding to the upper side of the shell H is connected to the connecting pipe 12 provided on the upper side of the upper refrigerant flow path module 10A via the refrigerant piping.

[0061] The lower refrigerant flow path module 10B is arranged below the upper refrigerant flow path module 10A at intervals. The lower refrigerant flow path module 10B is arranged above the bottom plate 63 of the shell 60 at intervals. Flow path switching valves 42a, 42c are arranged between the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B. The above-mentioned flow path switching valves 42a, 42c have a shell H with a built-in valve core and a plurality of ports P as the inlet and outlet of the refrigerant relative to the shell. Port P is a shorter pipe (refrigerant piping) protruding upward and downward from the shell H. Port P is formed of a material with copper as the main component, such as copper (pure copper) or a copper alloy. The port P protruding upward from the shell H is directly connected to the connecting pipe 12 provided at the lower part of the upper refrigerant flow path module 10A. The port P protruding downward from the shell H is directly connected to the connecting pipe 12 provided at the upper part of the lower refrigerant flow path module 10B.

[0062] A refrigerant pipe 25 is disposed between the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B. The refrigerant pipe 25 extends linearly in the up-down direction, and its upper end is connected to the connecting pipe 12 provided at the lower part of the upper refrigerant flow path module 10A, and its lower end is connected to the connecting pipe 12 provided at the upper part of the lower refrigerant flow path module 10B. Therefore, the refrigerant pipe 25 connects the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B at the shortest distance.

[0063] like Figure 4 As shown, a plurality of expansion valves 44 are connected to the lower side of the lower refrigerant flow path block 10B. The lower refrigerant flow path block 10B is connected to the upper refrigerant flow path block 10A via flow path switching valves 42a, 42c and refrigerant pipes 25, and is supported from above by the upper refrigerant flow path block 10A via these.

[0064] like Figure 3 and Figure 5 As shown, the refrigerant pipe 26 extending from the oil separator 46 is connected to the upper side of the lower refrigerant flow path module 10B. The refrigerant pipe 26 is connected to the oil separator 46 fixed to the housing 60, so the lower refrigerant flow path module 10B is also supported by the refrigerant pipe 26. In other words, the lower refrigerant flow path module 10B is stably supported by the refrigerant pipe 26 via the component 46 of the refrigerant circuit fixed to the housing 60.

[0065] Figure 7 This is a cross-sectional view showing an enlarged view of the refrigerant flow path module and the flow path switching valve. The connecting pipe 12 of the upper refrigerant flow path module 10A and the lower refrigerant flow path module 10B is formed into a cylindrical shape. The connecting pipe 12 has a straight tube axis. The outer diameter and the inner diameter of the connecting pipe 12 are fixed. The connecting pipe 12 is arranged in a manner that its tube axis is parallel to the up-down direction Z. Therefore, the tube axis of the connecting pipe 12 is perpendicular to the plate surface of the end plate 71. The length L of the connecting pipe 12 in the tube axis direction of the present embodiment is greater than 25 mm and less than 56 mm. The connecting pipe 12 may not be arranged so that its tube axis is strictly parallel to the up-down direction Z, for example, it may be inclined within the range of ±10° relative to the up-down direction Z.

[0066] One end of the connecting pipe 12 in the pipe axial direction is inserted into the opening 73 formed in the end plate 71. The outer peripheral surface of the connecting pipe 12 and the inner peripheral surface of the opening 73 are joined by brazing. In addition, the "inner peripheral surface of the opening 73" refers to the surface constituting the opening 73 of the end plate 71.

[0067] exist Figure 7 The other end of the connecting pipe 12 shown (the end on the side opposite to the side connected to the end plate 71) is connected to the port P of the flow path switching valve 42a, 42c. The upper port PU of the flow path switching valve 42a, 42c protruding upward from the shell H is directly connected to the connecting pipe 12 of the upper refrigerant flow path module 10A. The upper end of the upper port PU is provided with a large diameter portion D whose outer diameter is enlarged by flaring. The lower end of the connecting pipe 12 of the upper refrigerant flow path module 10A is inserted into the large diameter portion D, and its outer peripheral surface (connected surface) 13 is brazed to the inner peripheral surface Da of the large diameter portion D by the brazing material B.

[0068] The lower port PL of the flow path switching valve 42a, 42c protruding downward from the housing H is directly connected to the connecting pipe 12 of the lower refrigerant flow path module 10B. The lower end of the lower port PL is provided with a large diameter portion D whose outer diameter is enlarged by flaring. The upper end of the connecting pipe 12 of the lower refrigerant flow path module 10B is inserted into the large diameter portion D, and its outer peripheral surface (connected surface) 13 is brazed to the inner peripheral surface Da of the large diameter portion D by the brazing material B.

[0069] Figure 8 and Fig. 9 This is a diagram for explaining the procedure of connecting the refrigerant flow path module and the flow path switching valve. The following is a description of the steps for joining the flow path switching valves 42a~42c to the refrigerant flow path module 10. The joining is performed by torch brazing (burner brazing). In the sense of distinguishing this brazing from the "furnace brazing" described above, it is sometimes referred to as "manual brazing". In addition, in the following description, the lower surface 11a of each refrigerant flow path module 10A, 10B (module body 11) when assembled in the outdoor unit 31 is also referred to as the first surface, and the upper surface 11b is referred to as the second surface. In addition, the connecting pipe connected to the first surface 11a is referred to as the first connecting pipe 12a, and the connecting pipe 12 connected to the second surface 11b is referred to as the second connecting pipe 12b.

[0070] First, if Figure 8 As shown in (a), the first connecting pipe 12a provided on the first surface 11a of the module body 11 of the upper refrigerant flow path module 10A is inserted into the upper port PU of the flow path switching valves 42a and 42c. Figure 8 As shown in (b), with the first surface 11a of the module body 11 facing downward, the connected surface 13 (refer to Figure 7 ) is joined to the inner peripheral surface of the upper port PU of the flow path switching valve 42a, 42c.

[0071] Then, if Figure 8 As shown in (c), the upper refrigerant flow path module 10A is turned upside down. The second connecting pipe 12b provided on the second surface 11b of the module body 11 of the turned-up lower refrigerant flow path module 10B is inserted into the lower port PL of the flow path switching valves 42a, 42c facing upward.

[0072] Then, if Fig. 9 As shown in (a), with the second surface 11b of the module body 11 of the lower refrigerant flow path module 10B facing downward, the connected surface (outer peripheral surface) 13 of the second connecting pipe 12b is joined to the inner peripheral surface of the lower port PL of the flow path switching valve 42a, 42c.

[0073] Then, if Fig. 9 As shown in (b), the second connecting pipe 12b provided on the second surface 11b of the module body 11 of the upper refrigerant flow path module 10A is inserted into the lower port PL of the flow path switching valve 42b. Fig. 9 As shown in (c), with the second surface 11b of the module body 11 of the upper refrigerant flow path module 10A facing downward, the connected surface (outer peripheral surface) 13 of the second connecting pipe 12b is joined to the inner peripheral surface of the lower port PL of the flow path switching valve 42b.

[0074] The operation of connecting the flow path switching valves 42a to 42c to the refrigerant flow path modules 10A and 10B as described above is performed while cooling the housing H of the flow path switching valves 42a to 42c. This is because the housing H contains heat-sensitive components such as synthetic resin. Figure 8 (b) Fig. 9 In the brazing operation shown in (a) and (c), even if the housing H of the flow path switching valves 42a to 42c is cooled by cooling water, brazing can be performed on the housing H, thereby preventing the cooling water from flowing to the brazing portion.

[0075] As reference Fig.12 As described above, in the existing refrigerant flow path module (Patent Document 1), when the connecting pipe 112 and the refrigerant piping 101 are brazed, the brazing material B that penetrates between the two sometimes flows further downward and reaches the plate 122. Since the plate 122 is made of stainless steel, the brazing material B used to join the coppers to each other is difficult to adhere to and is easy to peel off after cooling and solidification. If the peeled brazing material B enters the refrigerant circuit through the flow path in the refrigerant flow path module, it may hinder the operation of the compressor, valve, etc. constituting the refrigerant circuit.

[0076] The inventor of the present application has learned through extensive and dedicated research that when Fig.12 When the length L1 shown in FIG. 1 is less than 50 mm, the brazing material B flowing downward may reach the stainless steel plate 122. Fig.13 As shown in FIG. 1 , it can be seen that when the brazing material B flows downward when the copper pipes are connected to each other with the brazing material, the length L3 can reach a maximum of 50 mm. In order to connect the connecting pipe 112 to the refrigerant pipe 101, the length L2 of the large diameter portion 112a needs to be at least 6 mm. Therefore, the connecting pipe 112 has a length of at least 56 mm ( Fig.12 Otherwise, the solder B is likely to enter the flow path 15 of the module body 11.

[0077] In the present invention, if Figure 7 As shown, by setting the connected surface on the outer peripheral surface 13 of the connecting tube 12 (the first connecting tube 12a and the second connecting tube 12b), even if the length L of the connecting tube 12 is less than 56 mm, the brazing material B connecting the two can be prevented from reaching the stainless steel module body 11. Figure 8 As shown in (b), when the first connecting pipe 12a is joined to the upper port PU (refrigerant pipe) by downward brazing, as shown in Fig. 10A As shown in the figure (the brazing direction is shown by the thick arrow), even if the brazing material B that has penetrated between the first connecting pipe 12a and the upper port PU flows downward, it will not reach the module body 11 located above the upper port PU. Fig. 9 The same is true for the downward brazing shown in (a) and (c).

[0078] Assume that the refrigerant flow path module 10 is not turned upside down. Fig. 9 For the brazing shown in (a) and (c), Fig. 10B As shown, the second connecting pipe 12b and the lower port PL are joined by brazing upward (the brazing direction is shown by the bold arrow). However, in this case, the brazing material B that penetrates into the gap between the second connecting pipe 12b and the lower port PL hardly exceeds the upper end of the second connecting pipe 12b and enters the second connecting pipe 12b. Therefore, it is possible to prevent the brazing material B from reaching the module body 11.

[0079] The length L of the connecting pipe 12 of this embodiment is 25 mm or more. Fig. 10A , Fig. 10B As shown, a space S for heating the connection pipe 12 can be ensured between the module body 11 and the port P, so that the workability of brazing can be ensured.

[0080] [Second embodiment] Fig.11 This is a cross-sectional view showing an enlarged view of a joint portion between a refrigerant flow path module and a flow path switching valve according to the second embodiment. In the first embodiment described above, the connecting pipe 12 has a fixed outer diameter and inner diameter, but the connecting pipe 12 of this embodiment has a large diameter portion 12c with an enlarged outer diameter and inner diameter at the end opposite to the end connected to the module body 11. The outer peripheral surface of the large diameter portion 12c constitutes a connected surface 13 connected to the port (refrigerant piping) P. The remaining structure is the same as that of the above embodiment, and therefore, a detailed description is omitted.

[0081] [Other embodiments] In the above embodiment, an example in which the connection pipe 12 of the refrigerant flow path block 10 is connected to the port (refrigerant pipe) P of the flow path switching valves 42a to 42c is described in detail, but the same structure can be adopted when connecting to other refrigerant pipes.

[0082] The connecting pipe 12 of the above embodiment has a fixed outer diameter and inner diameter or has a large diameter portion at one end, but is not limited thereto. For example, the connecting pipe 12 may also have a small diameter portion with a reduced outer diameter and inner diameter at the end opposite to the end connected to the module body 11.

[0083] Figure 8 and Fig. 9 The steps shown may be executed in a different order as appropriate. In addition, the refrigerant flow path module 10 may be in the same posture as the one shown in FIG. Figure 8 and Fig. 9 The pose shown is an upside-down pose, which can also be Figure 8 and Fig. 9 A posture completely different from the posture shown may be, for example, a posture in which the first surface 11 a and the second surface 11 b of the module body 11 are aligned in the vertical direction.

[0084] [Effects of the Embodiments] (1) The refrigerant flow path module 10 of the above embodiment includes a module body 11 and a first connecting pipe 12a, wherein the module body 11 has a plurality of stainless steel plates 71 and 72 stacked and formed with a refrigerant flow path 15 inside, and the first connecting pipe 12a is formed of a material mainly composed of copper and connected to the module body 11. The module body 11 has a first surface 11a and a second surface 11b, wherein the first surface 11a is arranged at one end in the stacking direction of the plurality of plates 71 and 72 and has a first opening 73 formed therein, and the second surface 11b is arranged at the other end in the stacking direction. The first connecting pipe 12a has a linear pipe axis, and one end of the first connecting pipe 12a in the pipe axis direction is connected to the module body 11 in a state where it is inserted into the first opening 73. A connected surface 13 is provided on the outer peripheral surface of the other end of the first connecting pipe 12a in the pipe axis direction, and the connected surface 13 is connected to the refrigerant pipe (port of the flow path switching valve 42a to 42c) P formed of a material mainly composed of copper. The length L of the first connecting pipe 12a is greater than or equal to 25 mm and less than 56 mm.

[0085] The refrigerant flow path module 10 of this structure provides the connected surface 13 on the outer peripheral surface of the first connecting tube 12a, so that even if the length L of the first connecting tube 12a is less than 56 mm, the brazing material B connecting the two can be prevented from reaching the module body 11 made of stainless steel. By setting the length L of the first connecting tube 12a to be greater than 25 mm, a space S for heating the first connecting tube 12a can be ensured between the module body 11 and the port P.

[0086] (2) The refrigerant flow path module 10 of the above embodiment also includes a second connecting pipe 12b, which has a straight tube axis and is formed of a material with copper as the main component. A second opening 73 is formed on the second surface 11b of the module body 11. One end of the second connecting pipe 12b in the tube axis direction is connected to the module body 11 in a state of being inserted into the second opening 73. A connected surface 13 is provided at the other end of the second connecting pipe 12b in the tube axis direction, and the connected surface 13 is connected to the refrigerant distribution pipe (port of the flow path switching valve 42a~42c) P formed of a material with copper as the main component. The length L of the second connecting pipe 12b is greater than 25mm and less than 56mm.

[0087] According to this structure, similarly to the first connecting tube 12a, by providing the connected surface 13 on the outer peripheral surface of the second connecting tube 12b, even if the length L of the second connecting tube 12b is less than 56 mm, it is possible to prevent the brazing material B connecting the two from reaching the stainless steel module body 11. By setting the length L of the second connecting tube 12b to be 25 mm or more, it is possible to ensure a space S between the module body 11 and the port P for heating the second connecting tube 12b.

[0088] (3) The refrigeration cycle device of the above embodiment includes the refrigerant pipe (port) P connected to the refrigerant flow path module 10 described in (1) above and to the connected surface 13 of the first connecting pipe 12a of the refrigerant flow path module 10. In the refrigeration cycle device of this structure, it is possible to prevent the brazing material B connecting the first connecting pipe 12a to the refrigerant pipe P from reaching the module body 11 and entering the components constituting the refrigeration cycle device 1 (components constituting the refrigerant circuit) from the module body 11.

[0089] (4) The refrigeration cycle device of the above embodiment includes: the refrigerant flow path module 10 described in (2) above; a first refrigerant pipe (port) P connected to the connected surface 13 of the first connecting pipe 12a of the refrigerant flow path module 10; and a second refrigerant pipe (port) P connected to the connected surface 13 of the second connecting pipe 12b of the refrigerant flow path module 10.

[0090] According to the refrigeration cycle device having the above structure, the brazing material connecting the first connection pipe 12 a and the first refrigerant pipe P and the second connection pipe 12 b and the second refrigerant pipe P can be prevented from reaching the module body 11 and entering the components constituting the refrigeration cycle device 1 from the module body 11 .

[0091] (5) The manufacturing method of the refrigeration cycle device of the above-mentioned embodiment includes a first step in which the other end of the first connecting pipe 12a of the refrigerant flow path module 10 is inserted into the inner side of the refrigerant pipe (port) P, and a second step in which the inner peripheral surface of the refrigerant pipe P is brazed to the connected surface 13 of the first connecting pipe 12a. In this case, the inner peripheral surface of the refrigerant pipe P is brazed to the connected surface 13 provided on the outer peripheral surface of the first connecting pipe 12a, thereby preventing the brazing material for brazing the two from reaching the module body 11.

[0092] (6) In the manufacturing method of the above embodiment, the second step is performed with the first surface 11a of the module body 11 of the refrigerant flow path module 10 facing downward. Fig. 10AAs shown, the first connecting pipe 12a and the refrigerant pipe P are joined by downward brazing, and the brazing material B that has penetrated between the first connecting pipe 12a and the refrigerant pipe P cannot reach the stainless steel module body 11 located above the port P even if it flows further downward.

[0093] (7) The manufacturing method of the above embodiment includes: Figure 8 As shown in (a) and (b) of the present invention, a first step is to insert the other end of the first connecting pipe 12a of the refrigerant flow path module 10A into the inner side of the first refrigerant pipe (port of the flow path switching valve 42a, 42c) PU; a second step is to braze the inner peripheral surface of the first refrigerant pipe PU to the connected surface 13 of the first connecting pipe 12a in a state where the first surface 11a of the module body 11 of the refrigerant flow path module 10A faces downward; Fig. 9 As shown in (b) and (c) of FIG. 1 , a third step is to insert the other end of the second connecting pipe 12b of the refrigerant flow path module 10A into the inner side of the second refrigerant pipe (port of the flow path switching valve 42b) PL; and a fourth step is to braze the inner peripheral surface of the second refrigerant pipe PL to the connected surface 13 of the second connecting pipe 12b with the second surface 11b of the module body 11 facing downward. According to this structure, the first connecting pipe 12a is joined to the first refrigerant pipe PU and the second connecting pipe 12b is joined to the second refrigerant pipe PL by brazing downward, and the brazing material B that has penetrated between each connecting pipe 12a, 12b and each refrigerant pipe PU, PL will not reach the module body 11 located above each refrigerant pipe PU, PL even if it flows further downward.

[0094] In addition, the present disclosure is not limited to the above-described examples but is shown by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims. For example, the number of plates constituting the module body of the refrigerant flow path module is not particularly limited as long as it is two or more. The types of components connected to the upper side and the lower side of the refrigerant flow path block 10 can be changed as appropriate. Explanation of symbols

[0095] 1. Refrigeration cycle device; 10 refrigerant flow path module; 10A upper refrigerant flow module; 10B lower refrigerant flow path module; 11 module body; 11a first side; 11b second side; 12 connecting pipe; 12a first connecting pipe; 12b second connecting pipe; 30 refrigerant circuit; 42a first flow path switching valve; 42b second flow path switching valve; 42c a third flow path switching valve; 71 boards; 72 boards; 73 openings (first opening, second opening); P port (refrigerant piping); PL lower side port (refrigerant piping); PU upper side port (refrigerant piping).

Claims

1. A refrigerant flow path module, characterized in that: include: a module body (11) having a plurality of stacked stainless steel plates (71, 72) and having a refrigerant flow path (15) formed therein; and a first connecting pipe (12a), the first connecting pipe being formed of a material having copper as a main component and being connected to the module body (11), The module body (11) has a first surface (11a) and a second surface (11b), wherein the first surface is arranged at one end in the stacking direction of the plurality of plates (71, 72) and is formed with a first opening (73), and the second surface is arranged at the other end in the stacking direction. The first connecting tube (12a) has a straight tube axis. One end portion of the first connecting pipe (12a) in the pipe axial direction is connected to the module body (11) in a state where it is inserted into the first opening (73). A connected surface (13) to which a refrigerant pipe (P) formed of a material having copper as a main component is connected is provided on the outer peripheral surface of the other end portion of the first connecting pipe (12a) in the pipe axial direction. The length of the first connecting pipe (12a) is greater than 25 mm and less than 56 mm.

2. The refrigerant flow path module according to claim 1, characterized in that: The refrigerant flow path module further includes a second connecting pipe (12b), the second connecting pipe having a straight tube axis and being formed of a material having copper as a main component. A second opening (73) is formed on the second surface (11b) of the module body (11). One end portion of the second connecting pipe (12b) in the pipe axial direction is connected to the module body (11) in a state where it is inserted into the second opening (73). A connected surface (13) for connecting a refrigerant pipe (P) formed of a material having copper as a main component is provided at the other end portion of the second connecting pipe (12b) in the pipe axial direction. The length of the second connecting pipe (12b) is greater than 25 mm and less than 56 mm.

3. A refrigeration cycle device, characterized in that: include: The refrigerant flow path module (10) as claimed in claim 1; as well as A refrigerant pipe (P) connected to a connected surface (13) of a first connecting pipe (12a) of the refrigerant flow path module (10).

4. A refrigeration cycle device, characterized in that: include: The refrigerant flow path module (10) as claimed in claim 2; a first refrigerant pipe (P) connected to a connected surface (13) of a first connecting pipe (12a) of the refrigerant flow path module (10); and A second refrigerant pipe (P) joined to a connected surface (13) of a second connecting pipe (12b) of the refrigerant flow path module (10).

5. A method for manufacturing a refrigeration cycle device, the method for manufacturing a refrigeration cycle device according to claim 3, characterized in that: include: A first step, in which the other end of the first connecting pipe (12a) of the refrigerant flow path module (10) is inserted into the inner side of the refrigerant pipe (P); as well as A second step, in which the inner peripheral surface of the refrigerant pipe (P) is brazed to the connected surface (13) of the first connecting pipe (12a).

6. The method for manufacturing a refrigeration cycle device according to claim 5, characterized in that: The second step is performed in a state where the first surface (11a) of the module body (11) of the refrigerant flow path module (10) is facing downward.

7. A method for manufacturing a refrigeration cycle device, the method for manufacturing a refrigeration cycle device according to claim 4, characterized in that: include: A first step, in which the other end of the first connecting pipe (12a) of the refrigerant flow path module (10) is inserted into the inside of the first refrigerant pipe (P); A second step, in which the inner peripheral surface of the first refrigerant pipe (P) is brazed to the connected surface (13) of the first connecting pipe (12a) with the first surface (11a) of the module body (11) of the refrigerant flow path module (10) facing downward; a third step, in which the other end of the second connecting pipe (12b) of the refrigerant flow path module (10) is inserted into the inner side of the second refrigerant pipe (P); as well as A fourth step, in which the inner peripheral surface of the second refrigerant pipe (P) is brazed to the connected surface (13) of the second connecting pipe (12b) with the second surface (11b) of the module body (11) facing downward.

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