JP4289063B2 - Plate-type refrigerant piping system parts for refrigeration equipment - Google Patents

Description

  The present invention relates to a plate-type refrigerant piping system component for a refrigeration apparatus, and more particularly, to a plate-type refrigerant piping system component for a refrigeration apparatus in which a refrigerant piping system in which a refrigerant flows is formed by bonding and joining plate members.

  Conventionally, a refrigerant piping system of a refrigeration apparatus such as an air conditioner is configured by connecting various functional parts and a pressure vessel with a copper pipe. In this way, when configuring a refrigerant piping system using copper pipes, many manufacturing processes such as bending of copper pipes, terminal processing, brazing, and the like, which are centered on manual work, are necessary. Cost is high. Moreover, when using a copper pipe, the compactness of the volume occupied by the refrigerant piping system in the refrigeration apparatus has reached its limit due to the limitation of the minimum bending radius.

  On the other hand, a method has been proposed in which a refrigerant piping system component is configured by bonding a pair of aluminum plate members whose concavo-convex portions are press-molded and brazing them in a vacuum furnace (for example, (See Patent Document 1).

  In addition, a method for constructing refrigerant piping system parts by bonding a pair of plate members made of copper, copper alloy, or aluminum or aluminum alloy, diffusion bonding, and performing expansion tube processing with high-pressure water has been proposed. (For example, refer to Patent Document 2).

In the refrigerant piping system parts obtained by the above-described method, the pressure of the refrigerant flowing through the inside acts to pull away the joint between the pair of plate members, thereby ensuring sufficient pressure resistance. Therefore, it is difficult to incorporate a large capacity pressure vessel such as an accumulator or a receiver into the refrigerant piping system parts. In particular, in recent years, a refrigeration apparatus using a refrigerant that operates under a high pressure condition has begun to be adopted for environmental measures and high performance. In this case, an attempt is made to separate a joint portion between a pair of plate members. The forces are so great that it is more difficult to incorporate large capacity pressure vessels.
JP-A-4-98057 JP-A-6-137478

  An object of the present invention is to allow a large-capacity pressure vessel to be incorporated in a plate-type refrigerant piping system component for a refrigeration apparatus in which a refrigerant piping system in which a refrigerant flows inside is formed by bonding and joining plate members. Is to make it.

The plate-type refrigerant piping system part for a refrigeration apparatus according to claim 1 is a plate-type refrigerant piping system part for a refrigeration apparatus in which a refrigerant piping system in which a refrigerant flows is formed by bonding and joining plate members. And a lid member, a first plate member, and a second plate member. The first plate member has a stepped portion into which the outer peripheral end of the lid member is fitted, and the outer peripheral end of the lid member is fitted into the stepped portion to form a container portion having a hollow space inside. The second plate member is bonded and joined to the first plate member. The lid member is joined to the step portion. And the 2nd plate member has a collar part arranged so that it may overlap with the insertion direction of a lid member to a lid member in the state where a lid member was fitted in the 1st plate member. The lid member is also joined to the collar portion.

  In this plate-type refrigerant piping system part for a refrigeration apparatus, the lid member and the step portion of the first plate member are joined, so that the lid member and the first plate member are pulled apart by the pressure of the refrigerant in the container portion. Even when the force acts, a shearing force mainly acts on the joint portion between the lid member and the step portion of the first plate member, and the conventional first plate member and second plate member Compared with the case where the container part is formed only by bonding and bonding, the pressure resistance of the container part is increased. Thereby, a pressure vessel with a large capacity can be incorporated in the plate-type refrigerant piping system component for the refrigeration apparatus.

In addition, in this plate-type refrigerant piping system component for a refrigeration apparatus, the lid member is further joined to the flange portion of the second plate member, and not only the joint portion between the lid member and the step portion of the first plate member, but also the lid Since the shearing force is applied also to the joint portion between the member and the flange portion of the second plate member, the pressure resistance of the container portion can be further increased.

The plate-type refrigerant piping system component for a refrigeration apparatus according to a second aspect is the first aspect, wherein the lid member, the first plate member, and the second plate member are joined by brazing in the furnace.

  In this plate-type refrigerant piping system component for a refrigeration apparatus, the lid member, the first plate member, and the second plate member can be joined at the same time, so the workability during joining can be improved.

A plate-type refrigerant piping system component for a refrigeration apparatus according to a third aspect is the first aspect, wherein the lid member, the first plate member, and the second plate member are joined by laser welding.

  In this plate-type refrigerant piping system part for a refrigeration system, since the weld beads appear in both members to be joined together, it is possible to proceed with the joining work while visually confirming the joining state of each member. The workability can be improved.

In the plate-type refrigerant piping system component for a refrigeration apparatus according to a fourth aspect , in any one of the first to third aspects, the lid member, the first plate member, and the second plate member are made of steel.

  In this plate-type refrigerant piping system component for a refrigeration apparatus, the pressure resistance can be improved as compared with the case of using copper, copper alloy, aluminum, or aluminum alloy.

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

In the invention according to claim 1 , the lid member and the step portion of the first plate member are joined, and a shearing force mainly acts between the lid member and the step portion of the first plate member. Therefore, the pressure resistance of the container portion is increased, and a pressure container having a large capacity can be incorporated. In addition, the lid member is further joined to the collar portion of the second plate member, and not only the junction portion between the lid member and the stepped portion of the first plate member but also the lid member and the collar portion of the second plate member. Since the shearing force is applied to the part, the pressure resistance of the container part can be further increased.

In the invention according to claim 2 , since the lid member, the first plate member, and the second plate member are joined by brazing in the furnace, the lid member, the first plate member, and the second plate member are joined at the same time. It is possible to improve workability at the time of joining.

In the invention according to claim 3 , since the lid member, the first plate member, and the second plate member are joined by laser welding, the joining operation can be performed while visually confirming the joining state of each member. It becomes possible, and the workability | operativity in the case of joining can be improved.

In the invention according to claim 4 , since the lid member, the first plate member, and the second plate member are made of steel, compared with the case of using copper or copper alloy, or aluminum or aluminum alloy, the pressure strength is reduced. Can be improved.

  Hereinafter, an embodiment of a plate type refrigerant piping system component for a refrigeration apparatus of the present invention will be described based on the drawings.

[First Embodiment]
(1) Configuration of Refrigerant Circuit of Air Conditioner FIG. 1 is a diagram showing a schematic refrigerant circuit of an air conditioner 1 as a refrigeration apparatus according to an embodiment of the present invention. The air conditioner 1 can perform a cooling operation and a heating operation, and mainly uses a heat exchanger 51, a compressor 21, a four-way switching valve 22, a heat source side heat exchanger 23, and an expansion circuit 24. These devices are connected via a refrigerant pipe to constitute a refrigerant circuit 1a. Moreover, in this embodiment, the air conditioning apparatus 1 is a separation-type air conditioning apparatus, and is mainly the utilization unit 3 which has the utilization side heat exchanger 51, the compressor 21, the four-way switching valve 22, and the heat source side. The heat source unit 2 includes a heat exchanger 23 and an expansion circuit 24, and includes a liquid refrigerant communication tube 4 and a gas refrigerant communication tube 5 that connect the units 2 and 3. The heat source unit 2 and the refrigerant communication tubes 4 and 5 are connected to each other via a liquid side closing valve 25 and a gas side closing valve 26 provided in the heat source unit 2.

  The compressor 21 is a device for compressing and discharging a low-pressure gas refrigerant. The suction side of the compressor 21 is connected to the four-way switching valve 22 via the compressor suction pipe 8, and the discharge side is the compressor discharge pipe 9. Is connected to the four-way selector valve 22. A pressure sensor 27 is connected to the compressor suction pipe 8. A pressure switch 28, a check valve 29 and a muffler 30 are connected to the compressor discharge pipe 9.

  The four-way switching valve 22 is a valve used for switching between the cooling operation and the heating operation. During the cooling operation, the first gas refrigerant tube connected to the gas side of the compressor discharge pipe 9 and the heat source side heat exchanger 23. 10 and the function of connecting the compressor suction pipe 8 and the second gas refrigerant pipe 11 connected to the gas side shut-off valve 26, and the compressor discharge pipe 9 and the second gas refrigerant pipe 11 during heating operation. And a function of connecting the compressor suction pipe 8 and the first gas refrigerant pipe 10. A filter 31 is connected to the second gas refrigerant pipe 11.

  The heat source side heat exchanger 23 is a heat exchanger for condensing or evaporating the refrigerant using outdoor air or water as a heat source.

  The use side heat exchanger 51 is a heat exchanger for performing heat exchange between room air and a refrigerant to cool or heat the room air.

  The expansion circuit 24 is connected between the use side heat exchanger 51 and the heat source side heat exchanger 23, and includes a bridge circuit 32 and a communication circuit 33 connected to the bridge circuit 32. Specifically, the expansion circuit 24 is connected to the first liquid refrigerant pipe 12 connected to the liquid side closing valve 25 and the second liquid refrigerant pipe 13 connected to the heat source side heat exchanger 23. A filter 34 is connected to the first liquid refrigerant pipe 12.

  The bridge circuit 32 is connected to the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13, and the first liquid refrigerant is connected from one of the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13 via the communication circuit 33. The refrigerant can be circulated to the other of the pipe 12 and the second liquid refrigerant pipe 13. Specifically, the bridge circuit 32 causes the refrigerant from the second liquid refrigerant pipe 13 (that is, the heat source side heat exchanger 23 side) to flow into the communication circuit 33 during the cooling operation, and then passes through the communication circuit 33. The refrigerant can be circulated through the first liquid refrigerant pipe 12 (that is, the use side heat exchanger 51 side). In addition, the bridge circuit 32 allows the refrigerant to flow through the second liquid refrigerant pipe 13 through the communication circuit 33 after flowing the refrigerant from the first liquid refrigerant pipe 12 into the communication circuit 33 during the heating operation. Is possible. The bridge circuit 32 includes an inflow circuit 35 connected to the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13 and the inlet of the communication circuit 33, and the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13 and the communication circuit. And an outflow circuit 36 connected to 33 outlets. The inflow circuit 35 includes a check valve 35 a that allows only the refrigerant flow from the first liquid refrigerant pipe 12 to the communication circuit 33, and a reverse that allows only the refrigerant flow from the second liquid refrigerant pipe 13 to the communication circuit 33. And has a function of circulating the refrigerant from one of the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13 to the communication circuit 33. The outflow circuit 36 includes a check valve 36 a that allows only the refrigerant flow from the communication circuit 33 to the first liquid refrigerant pipe 12 and a reverse valve that allows only the refrigerant flow from the communication circuit 33 to the second liquid refrigerant pipe 13. And has a function of circulating the refrigerant from the communication circuit 33 to the other of the first liquid refrigerant pipe 12 and the second liquid refrigerant pipe 13.

  The communication circuit 33 has a receiver 37 capable of temporarily storing the liquid refrigerant. The inlet of the receiver 37 is connected to the receiver inlet pipe 14 connected to the inflow circuit 35, and the outlet of the receiver 37 is connected to the receiver outlet pipe 15 connected to the outflow circuit 36. A capillary tube 38 and an electromagnetic valve 39 connected in parallel to the capillary tube 38 are connected to the receiver inlet pipe 14. The receiver outlet pipe 15 is connected to an electric expansion valve 40 that allows the refrigerant accumulated in the receiver 37 to flow through and shut off the outflow circuit 36 and adjust the valve opening.

(2) Structure of plate-type refrigerant piping system parts A part of the refrigerant circuit 1a on the heat source unit 2 side is bonded by bonding a pair of plate members 62 and 63, as shown in FIGS. By doing so, it is integrated as a plate-type refrigerant piping system component 61 in which a refrigerant piping system in which a refrigerant flows is formed. Here, FIG. 2 is a front view of the plate-type refrigerant piping system component 61 according to the present embodiment. FIG. 3 is a side view of the plate-type refrigerant piping system component 61 according to the present embodiment. FIG. 4 is a top view of the plate-type refrigerant piping system component 61 according to the present embodiment.

  In this embodiment, the plate-type refrigerant piping system component 61 includes a compressor suction pipe system 64, a receiver system 65, and a liquid side filter system 66, as shown in FIGS. ing. FIG. 5 is a schematic diagram showing a refrigerant piping system in the gas side portion of the refrigerant circuit 1a, and shows a portion incorporated in the plate-type refrigerant piping system component 61 in the present embodiment. FIG. 6 is a schematic diagram showing the refrigerant piping system of the liquid side portion of the refrigerant circuit 1a, and shows a portion incorporated in the plate-type refrigerant piping system component 61 in the present embodiment. 5 and 6, the portion of the refrigerant piping system incorporated in the plate-type refrigerant piping system component 61 is indicated by a solid line, and the portion not incorporated in the plate-type refrigerant piping system component 61 is indicated by a broken line. Yes. Further, the circles in FIGS. 5 and 6 indicate the connection positions of the plate-type refrigerant piping system component 61 and the functional component or the refrigerant piping.

  As shown in FIG. 5, the compressor suction pipe system 64 includes a gas pipe portion 67 that is a part of the compressor suction pipe 8, a gas pipe portion 68 that is a part of the first gas refrigerant pipe 10, A gas pipe portion 69 which is a part of the two-gas refrigerant pipe 11 is configured. The gas pipe portion 67 has a connection port 67 a connected to the four-way switching valve 22, a connection port 67 b for connecting the pressure sensor 27, and a connection port 67 c connected to the compressor 21. The gas pipe portion 68 has a connection port 68 a connected to the four-way switching valve 22 and a connection port 68 b connected to the heat source side heat exchanger 23. The gas pipe portion 69 has a connection port 69 a connected to the four-way switching valve 22 and a connection port 69 b connected to the filter 31.

  As shown in FIG. 6, the receiver system 65 constitutes a part of the connection circuit 33 of the expansion circuit 24. More specifically, the receiver system 65 includes a liquid pipe part 70 that is a part of the receiver inlet pipe 14 of the communication circuit 33, a receiver 37, and a liquid pipe part that is a part of the receiver outlet pipe 15 of the communication circuit 33. 71 and the liquid pipe part 72 are constituted. The liquid pipe part 70 has a connection port 70 a connected to the outlet of the capillary tube 38 and a connection port 70 b connected to the outlet of the electromagnetic valve 39. The liquid pipe portion 71 has a connection port 71 a connected to the inlet of the electric expansion valve 40. The liquid pipe portion 72 has a connection port 72 a connected to the outlet of the electric expansion valve 40 and a connection port 72 b connected to the bridge circuit 32.

  As shown in FIG. 6, the liquid side filter system 66 constitutes a liquid pipe portion 73 and a filter 34 that are part of the first liquid refrigerant pipe 12. The liquid pipe portion 73 has a connection port 73 a connected to the bridge circuit 32 and a connection port 73 b connected to the liquid side shut-off valve 25.

  As shown in FIGS. 2, 3, and 4, the plate-type refrigerant piping system component 61 is a pair of plate members in which concave and convex portions and holes for forming the refrigerant piping systems 64, 65, and 66 are formed. The compressor suction pipe system 64, the receiver system 65, and the liquid side filter system 66 are integrally formed by bonding 62 and 63 and joining them by brazing in the furnace. Here, a plate member constituting the front side portion of the plate-type refrigerant piping system part 61 is referred to as a plate member 62, and a plate member constituting the back side portion of the plate-type refrigerant piping system part 61 is referred to as a plate member 63. As the plate members 62 and 63, it is possible to use copper, copper alloy, aluminum or aluminum alloy, or steel such as carbon steel or stainless steel. However, in the present embodiment, in consideration of strength. Uses steel.

  The plate-type refrigerant piping system component 61 has a shape in which the shape of the “L” in the front view is reversed left and right, and a compressor suction pipe system 64 is disposed on the left side of FIG. A receiver system 65 is disposed on the right side of the sheet, and a liquid filter system 66 is disposed on the upper right side of the sheet of FIG.

  First, the compressor suction pipe system 64 will be described. The gas pipe portion 67 is formed so as to extend in the vertical direction on the left side in FIG. A connection port 67 a that opens between the upper end surfaces of the plate members 62 and 63 is formed at the upper end of the gas pipe portion 67. A connection port 67 c that opens to the plate member 62 side (front side) is formed at the lower end of the gas pipe portion 67. Further, a connection port 67 b that opens to the plate member 62 side is formed in the vicinity of the middle in the vertical direction of the gas pipe portion 67. The gas pipe portion 68 is formed to extend in the vertical direction along the upper end portion of the gas pipe portion 67 (specifically, the right side of the gas pipe portion 67 in FIG. 2). A connection port 68 a that opens between the upper end surfaces of the plate members 62 and 63 is formed at the upper end portion of the gas pipe portion 68. A connection port 68 b that opens to the plate member 62 side is formed at the lower end of the gas pipe portion 68. The gas pipe portion 69 is formed so as to extend in the vertical direction along the upper end portion of the gas pipe portion 67 (specifically, the left side of the gas pipe portion 67 in FIG. 2). A connection port 69 a that opens between the upper end surfaces of the plate members 62 and 63 is formed at the upper end of the gas pipe portion 69. A connection port 69 b that opens to the plate member 62 side is formed at the lower end of the gas pipe portion 69.

  Next, the receiver system 65 will be described. The receiver 37 is formed on the lower right side in FIG. As shown in FIG. 7, the receiver 37 is a container portion having a hollow space S inside formed by bonding and joining the plate member 62 and the plate member 63. Here, FIG. 7 is an AA cross-sectional view of FIG.

  As shown in FIG. 7, the plate member 62 is bonded to the plate member 63 on the outer peripheral side of the first convex portion 74 and the first convex portion 74 protruding toward the front side of the plate-type refrigerant piping system component 61. And a first joining portion 75 joined together. Further, the plate member 63 includes a second convex portion 76 projecting toward the back side of the plate-type refrigerant piping system component 61 at a position corresponding to the first convex portion 74, and a plate on the outer peripheral side of the second convex portion 76. A second joining portion 77 is formed by being bonded to and joined to the member 62 (specifically, the first joining portion 75). The convex portions 74 and 76 secure a hollow space S between the plate members 62 and 63 to constitute the receiver 37.

  A backing metal 78 is disposed inside the receiver 37 and joined to the plate member 62 and the plate member 63. More specifically, the backing metal 78 includes a first reinforcing joint 74 a formed near the first joint 75 of the first convex 74 and a second joint of the second convex 76 in the space S. This is a member disposed in proximity to both the second reinforcing joint 76a formed in the vicinity of the portion 77. Here, the first reinforcing joint 74a is a portion extending toward the front side of the plate-type refrigerant piping system component 61 (that is, the direction intersecting the joint surface between the plate member 62 and the plate member 63), and the second reinforcing joint 74a. The joint portion 76 a is a portion extending toward the back side of the plate-type refrigerant piping system component 61 (that is, the direction intersecting the joint surface between the plate member 62 and the plate member 63). The backing metal 78 has a shape along the inner surfaces of the reinforcing joints 74a and 76a. The backing metal 78 may be disposed so as to correspond to the entire circumference of the reinforcing joints 74a and 76a, or may be disposed so as to correspond to only a part of the reinforcing joints 74a and 76a. Good. Further, the backing metal 78 may be a single annular member or may be composed of a plurality of members. When the plate member 62 and the plate member 63 are brazed and joined in the furnace, a part of the brazing material 79 that joins between the first joint 75 and the second joint 76 is used as the backing metal 78. The member 62 and the plate member 63 (specifically, the first reinforcing joint 74a and the second reinforcing joint 76a) flow into the gap between the backing metal 78 and are joined by brazing.

  In FIG. 2, the liquid pipe portion 70 is formed so as to extend upward from the upper portion of the receiver 37. The liquid pipe portion 70 is formed with a connection port 70a and a connection port 70b that open to the plate member 62 side. The liquid pipe portion 71 is formed to extend upward from the receiver 37 on the side of the liquid pipe portion 71 (specifically, on the left side of the liquid pipe portion 70 in FIG. 2). A connection port 71 a that opens between the upper end surfaces of the plate members 62 and 63 is formed at the upper end of the liquid pipe portion 71. The liquid pipe part 72 is formed to extend in the vertical direction to the side of the upper end of the liquid pipe part 71 (specifically, the right side of the liquid pipe part 71 in FIG. 2). A connection port 72 a that opens between the upper end surfaces of the plate members 62 and 63 is formed at the upper end of the liquid pipe portion 72. A connection port 72 b that opens to the plate member 62 side (front side) is formed at the lower end of the liquid pipe portion 72.

Next, the liquid side filter system 66 will be described. The filter 34 is formed between the liquid pipe part 70 and the liquid pipe part 72 in FIG. As shown in FIG. 8, the filter 34 includes a main body 80 having a hollow space T inside by joining the plate member 62 and the plate member 63, and a space T ₁ on the plate member 62 side and the space T ₁ on the plate member 63 side. The filter unit 81 is arranged so as to be divided into the space T ₂ . The main body portion 80 is a portion that supports the filter portion 81, and includes a connection port 73 a that opens to the plate member 62 side and a connection port 73 b that opens to the plate member 63 side (back side). That is, the main body part 80 also functions as the liquid pipe part 73. The filter unit 81 includes an oval filter element 81a made of a wire mesh or the like, and a reinforcing frame 81b that supports the outer periphery of the filter element 81a. The filter unit 81 is disposed so as to be sandwiched between the joint surface of the plate member 62 and the joint surface of the plate member 63, and is joined simultaneously with the brazing of the plate member 62 and the plate member 63. . More specifically, the plate member 63 is formed with a sandwiching portion 82 for forming a gap corresponding to the thickness of the reinforcing frame 81b between the plate member 62 and the sandwiching portion 82 and the plate member 62. The reinforcing frame 81b of the filter unit 81 is sandwiched between and brazed. In addition, the clamping part 82 may be formed in the plate member 62, and may be formed in both the plate members 62 and 63. FIG.

(3) Method for Manufacturing Plate-type Refrigerant Piping System Parts Next, a method for manufacturing the plate-type refrigerant piping system parts 61 will be described.

  The plate-type refrigerant piping system component 61 is mainly formed by forming concave and convex portions and hole portions for forming the respective refrigerant piping systems 64, 65, 66 in a pair of plate members 62, 63. It is manufactured by bonding together and brazing in a furnace. The manufacturing method of such a plate-type refrigerant | coolant piping system component 61 is equipped with the formation process, the backing metal attachment process, the bonding process, and the joining process.

  First, the molding process will be described. In the molding step, the concave and convex portions and the hole portions (including the convex portions 74 and 76) for forming the respective refrigerant piping systems 64, 65, and 66 are formed in the pair of plate members 62 and 63. The uneven portion and the hole are formed by pressing or burring.

  Next, the backing metal attaching step will be described. In the backing metal attaching step, the backing metal 78 is brought close to one of the first reinforcing joint 74 a of the first convex portion 74 of the plate member 62 or the second reinforcing joint portion 76 a of the second convex portion 76 of the plate member 63. As shown in FIG.

  Next, the bonding process will be described. In the bonding step, the pair of plate members 62 and 63 are bonded together. At this time, the backing metal 78 is disposed inside the receiver 37 so as to be close to both the first reinforcing joint 74a and the second reinforcing joint 76a.

  Next, the joining process will be described. In the joining step, the pair of plate members 62 and 63 are joined by brazing in the furnace to form the respective refrigerant piping systems 64, 65 and 66. At this time, in the bonding step, the backing metal 78 is disposed so as to be close to both the first reinforcing joint portion 74a of the first convex portion 74 and the second reinforcing joint portion 76a of the second convex portion 76. Therefore, as shown in FIG. 7, a part of the brazing material 79 that joins between the first joint portion 75 and the second joint portion 76 is made up of the plate member 62 and the plate member 63 (specifically, the first reinforcement member). The joint 74a and the second reinforcing joint 76a) flow into the gap between the backing metal 78 and are joined by brazing. A reduction furnace or a vacuum furnace is used as a furnace used for brazing in the furnace.

  The plate-type refrigerant piping system component 61 shown in FIGS. 2 to 4 is manufactured by the above manufacturing method.

(4) Features of plate-type refrigerant piping system parts The plate-type refrigerant piping system parts of the present embodiment have the following characteristics.

(A) Structure in which pressure resistance of receiver is improved by adding backing metal In plate-type refrigerant piping system component 61 of the present embodiment, receiver system 65 including receiver 37 having a large capacity is incorporated. Conventionally, even if such a large pressure vessel is to be incorporated into a plate-type refrigerant piping system part in which a refrigerant piping system in which a refrigerant flows is formed by bonding plate members together, Due to the pressure of the refrigerant, a force for separating the joint portion between the plate members acts, and sufficient strength cannot be ensured.

  However, in the plate-type refrigerant piping system component 61 of this embodiment, the backing metal 78 and the first reinforcing joint 74a of the plate member 62 are joined, and the second reinforcing joint of the backing metal 78 and the plate member 63 is joined. Since the portion 76a is joined, the joint portion of the plate member 62 and the plate member 63 as shown by the arrow C in FIG. Even in the case where a force for separating the contact portion 77 between the backing metal 78 and the plate member 62 and between the backing metal 78 and the plate member 63 is sheared. Force is acting. As a result, in this plate-type refrigerant piping system component 61, a force for separating the joint portion between the plate member 62 and the plate member 63 is less likely to act, and the pressure resistance strength of the receiver 37 is increased.

  In this way, by using a structure with a backing metal added, a large-capacity pressure vessel such as an accumulator or a receiver can be incorporated in the plate-type refrigerant piping system parts. In particular, in an air conditioner that uses a refrigerant that operates under high-pressure conditions such as R410A and R32, a pressure vessel having a large capacity can be incorporated when applying plate-type refrigerant piping system components.

  Further, since the backing metal 78 is brazed and joined at the same time when the pair of plate members 62 and 63 are brazed in the furnace, workability at the time of joining is improved.

(B) Structure with improved compressive strength by material selection Since the pair of plate members 62 and 63 and the backing metal 78 constituting the plate-type refrigerant piping system component 61 of the present embodiment are made of steel, copper or copper Compared to the case of using an alloy or aluminum or an aluminum alloy, the pressure resistance of the plate-type refrigerant piping system component 61 is higher.

(5) Modification In the plate-type refrigerant piping system component 61 of the above embodiment, as shown in FIG. 7, a pair of plate members 62 and 63 and a backing metal 78 are joined by brazing in the furnace. As shown in FIG. 9, the pair of plate members 62 and 63 and the backing metal 78 may be joined by laser welding.

  Specifically, since a sealing property is required for the joint portion between the pair of plate members 62 and 63 (that is, between the first joint portion 75 and the second joint portion 77), all-around welding is performed. Perform (see weld bead 83 shown in FIG. 9). And the joining part of backing metal 78 and plate member 62 (namely, 1st reinforcement joined part 74a), and the joined part of backing metal 78 and plate member 63 (namely, 2nd reinforcement joining part 76a), Since no sealability is required, partial welding is performed (see weld bead 84 shown in FIG. 9). In addition, about the junction part of the backing metal 78 and the plate member 62 (namely, 1st reinforcement joining part 74a), and the junction part of the backing metal 78 and the plate member 63 (namely, 2nd reinforcement joining part 76a). Alternatively, all-round welding may be performed, but considering the workability, it is efficient to perform partial welding.

  In this case, a plurality of joint portions cannot be joined at the same time as in the furnace brazing, but the weld bead 83 appears in both the pair of plate members 62 and 63, so that the pair of plate members 62 and 63 It is possible to proceed with the joining work while visually confirming the joined state, and the workability during joining is improved.

[Second Embodiment]
(1) Structure of plate-type refrigerant piping system component Hereinafter, a plate-type refrigerant piping system component 161 according to a second embodiment of the present invention will be described. Note that the configuration of the refrigerant circuit of the air conditioner of the present embodiment and the refrigerant piping system incorporated in the plate-type refrigerant piping system component 161 are the same as those in the first embodiment, so the description thereof will be omitted and only the differences will be described. Is described below.

  The plate-type refrigerant piping system component 161 of this embodiment is mainly formed by bonding and joining plate members 162 and 163, and includes a compressor suction pipe system 64, a receiver system 165, and a liquid side filter system. 66. The plate-type refrigerant piping system component 161 has a shape in which the shape of the “L” in the front view is reversed left and right, like the plate-type refrigerant piping system component 61 of the first embodiment. A compressor suction pipe system 64 is disposed on the left side of FIG. 10, a receiver system 165 is disposed on the right side of FIG. 10, and a liquid filter system 66 is disposed on the upper right side of FIG. In the present embodiment, the compressor suction pipe system 64 and the liquid side filter system 66 have the same structure as the compressor suction pipe system and the liquid side filter system of the plate-type refrigerant piping system component 61 of the first embodiment. The description is omitted.

  The receiver system 165 will be described. The receiver 137 is formed on the lower right side in FIG. As shown in FIG. 11, the receiver 137 is a container portion having a hollow space S inside formed by bonding and joining the plate member 162, the plate member 163, and the lid member 191. Here, FIG. 11 is an AA cross-sectional view of FIG. In addition, since the liquid pipe part 70, the liquid pipe part 71, and the liquid pipe part 72 are the same structures as 1st Embodiment, description is abbreviate | omitted and only the receiver 137 is demonstrated.

  As shown in FIGS. 10 and 11, the plate member 162 is bonded to the plate member 163 on the outer peripheral side of the flange portion 174 and the flange portion 174 protruding toward the front side of the plate-type refrigerant piping system component 161. The first joint portion 175 joined together is formed. An opening 176 is formed inside the flange 174 of the plate member 162.

  As shown in FIG. 11, the plate member 163 includes a protrusion 177 that protrudes toward the back side of the plate-type refrigerant piping system component 161 at a position corresponding to the opening 176, and a plate on the outer peripheral side of the protrusion 177. A second joint portion 178 is formed which is bonded and joined to the member 162 (specifically, the first joint portion 175).

  The lid member 191 is formed at a position corresponding to the convex portion 177 toward the front side of the plate-type refrigerant piping system component 161, and the convex portion 177 of the plate member 163 formed at the outer peripheral end of the convex portion 192. And a fitting portion 193 to be fitted into the. The fitting portion 193 is a portion extending toward the back side of the plate-type refrigerant piping system component 161 (that is, the direction intersecting the joint surface between the plate member 162 and the plate member 163).

  Here, a step portion 179 into which the fitting portion 193 of the lid member 191 is fitted is formed in the vicinity of the second joint portion 178 of the convex portion 177 of the plate member 163. The stepped portion 179 has a contact portion 179a and a cylindrical portion 179b. The abutting portion 179a is a portion having an inner surface substantially parallel to the joint surface between the plate member 162 and the plate member 163, and is fitted when the fitting portion 193 is fitted into the convex portion 177 (that is, the step portion 179). The end portion of the joint portion 193 on the plate member 163 side comes into contact with the fitting portion 193 so that the fitting margin of the fitting portion 193 is limited to a predetermined length. The cylindrical portion 179b is a second joint portion from the outer peripheral end of the contact portion 179a toward the front side of the plate-type refrigerant piping system component 161 (that is, the direction intersecting the joint surface between the plate member 162 and the plate member 163). 178 extends to the inner peripheral end of 178 and is close to the outer peripheral surface of the fitting portion 193 in a state where the fitting portion 193 is fitted into the stepped portion 179.

  The flange 174 of the plate member 162 and the stepped portion 179 of the plate member 163 may be disposed so as to correspond to the entire circumference of the fitting portion 193 of the lid member 191 or a part of the fitting portion 193. It may be arranged so as to correspond only to. The fitting portion 193 of the lid member 191, the flange portion 174 of the plate member 162, and the step portion 179 of the plate member 163 are the first when the plate member 162 and the plate member 163 are brazed and joined in the furnace. Part of the brazing material 180 that joins between the joint portion 175 and the second joint portion 178 is a fit between the plate member 162 and the plate member 163 (specifically, the flange portion 174 and the step portion 179) and the lid member 191. It flows into the gap with the part 193 and is brazed.

  As described above, in the plate-type refrigerant piping system component 161 of the present embodiment, the refrigerant piping system other than the receiver 137 is formed by bonding a pair of plate members 162 and 163 to each other and joining them. 137 is formed by fitting a lid member 191 into the plate member 163.

(3) Manufacturing Method of Plate-type Refrigerant Piping System Parts Next, a manufacturing method of the plate-type refrigerant piping system parts 161 will be described.

  The plate-type refrigerant piping system component 161 is mainly formed by forming concave and convex portions and holes for forming the refrigerant piping systems 64, 165, 66 in a pair of plate members 162, 163, so that the plate members 162, 163 are formed. It is manufactured by bonding together and brazing in a furnace. Such a manufacturing method of the plate-type refrigerant piping system component 161 includes a forming step, a lid member attaching step, a bonding step, and a joining step.

  First, the molding process will be described. In the molding step, the concave and convex portions and the hole portions (including the flange portion 174, the opening portion 176, and the convex portion 177) for forming the refrigerant piping systems 64, 165, and 66 are formed in the pair of plate members 162 and 163. . The uneven portion and the hole are formed by pressing or burring.

  Next, the lid member attaching step will be described. In the lid member attaching step, the lid member 191 constituting the receiver 137 is fitted into the plate member 163 to form a hollow space S therein. Specifically, the fitting part 193 of the lid member 191 is inserted until it comes into contact with the contact part 179 a of the step part 179 of the plate member 163.

  Next, the bonding process will be described. In the bonding step, the plate member 162 is bonded to the plate member 163 in which the lid member 191 is fitted. Here, since the opening 176 through which the convex portion of the lid member 191 can penetrate is formed inside the flange portion 174 of the plate member 162, the first joint portion 175 and the second joint portion 178 are close to each other. Thus, the plate member 162 and the plate member 163 are bonded together.

  Next, the joining process will be described. In the joining step, the pair of plate members 162, 163 and the lid member 191 are joined by brazing in the furnace to form the respective refrigerant piping systems 64, 165, 66. At this time, the lid member 191 is disposed so as to be close to the cylindrical portion 179b of the stepped portion 179 of the plate member 163 in the lid member attaching step, and the lid member 191 is disposed on the flange portion 174 of the plate member 162 in the bonding step. Since they are arranged so as to be close to each other, as shown in FIG. 11, a part of the brazing material 180 that joins between the first joint 175 and the second joint 178 is part of the plate member 162 and the plate member 163 ( Specifically, it flows into the gap between the flange portion 174 and the step portion 179) and the fitting portion 193 of the lid member 191, and is joined by brazing. A reduction furnace or a vacuum furnace is used as a furnace used for brazing in the furnace.

  The plate-type refrigerant piping system component 161 shown in FIGS. 10 and 11 is manufactured by the above manufacturing method.

(4) Features of plate-type refrigerant piping system parts The plate-type refrigerant piping system parts of the present embodiment have the following characteristics.

(A) Structure in which pressure-resistant strength is improved by adopting a cover member fitting structure In the plate-type refrigerant piping system component 161 of the present embodiment, a pair of plate members 62 and 63, like the receiver 37 of the first embodiment. In addition to forming a hollow space S in the interior and attaching a backing metal 78, the plate member 163 is provided with a step portion 179, and the fitting portion 193 of the lid member 191 is connected to the step portion. A receiver 137 having a hollow space S inside is formed by fitting and joining to 179.

  Even in this case, since the lid member 191 and the stepped portion 179 of the plate member 163 are joined, a force for separating the lid member 191 and the plate member 163 acts due to the pressure of the refrigerant in the receiver 137. In addition, since the shearing force mainly acts between the lid member 191 and the stepped portion 179 of the plate member 163, the pressure resistance strength of the receiver 137 is increased.

  As described above, by adopting the cover member fitting structure, a large-capacity pressure vessel such as an accumulator or a receiver can be incorporated in the plate-type refrigerant piping system components. In particular, in an air conditioner that uses a refrigerant that operates under high-pressure conditions such as R410A and R32, a pressure vessel having a large capacity can be incorporated when applying plate-type refrigerant piping system components.

  The lid member 191 is also joined to the flange portion 174 of the plate member 162, and not only between the lid member 191 and the stepped portion 179 of the plate member 163 but also the flange portion 174 of the lid member 191 and the plate member 162. Since the shearing force acts also between the two, the pressure resistance strength of the receiver 137 further increases.

  Further, since the lid member 191 is brazed and joined at the same time when the pair of plate members 162 and 163 are brazed in the furnace, workability at the time of joining is improved.

(B) Structure with improved pressure resistance by material selection Since the cover member 191 and the pair of plate members 162 and 163 constituting the plate-type refrigerant piping system component 161 of the present embodiment are made of steel, copper or copper alloy Or compared with the case where aluminum or aluminum alloy is used, the pressure resistance of the plate-type refrigerant piping system component 161 is higher.

(5) Modification In the plate-type refrigerant piping system component 161 of the above embodiment, as shown in FIG. 11, the lid member 191 and the pair of plate members 162 and 163 are joined by brazing in the furnace. As shown in FIG. 12, the lid member 191 and the pair of plate members 162 and 163 may be joined by laser welding.

  Specifically, a joint portion between the pair of plate members 162 and 163 (that is, between the first joint portion 175 and the second joint portion 178), the fitting portion 193 of the lid member 191, and the plate member 162. Since sealing performance is required between the flange 174 and the flange portion 174, all-around welding is performed (see weld beads 181 and 182 shown in FIG. 12). And since the sealing performance is not requested | required about the junction part of the fitting part 193 of the cover member 191 and the level | step-difference part 179 (specifically cylindrical part 179b) of the 2nd plate member 163, partial welding is performed ( (See weld bead 183 shown in FIG. 12). In addition, although the perimeter welding may be performed also about the junction part of the lid | cover member 191 and the level | step-difference part 179 of the plate member 163, considering workability | operativity, it is efficient to perform partial welding.

  In this case, a plurality of joint portions cannot be joined simultaneously like in-furnace brazing, but since the weld bead 181 appears in both the pair of plate members 162 and 163, the pair of plate members 162 and 163 It is possible to proceed with the joining work while visually confirming the joined state, and the workability during joining is improved.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

(A)
In the first and second embodiments and the modifications thereof, the present invention is applied to the air conditioner. However, the present invention is not limited to this and can be applied to other refrigeration apparatuses.

(B)
The type of the refrigerant piping system incorporated as the plate-type refrigerant piping system component is not limited to the first and second embodiments and their modifications, and various refrigerant piping systems can be incorporated. For example, a compressor discharge pipe including a muffler can be incorporated as a plate-type refrigerant piping system component. Further, the arrangement of the refrigerant piping system in the plate-type refrigerant piping system parts is not limited to the first and second embodiments and the modified examples.

(C)
In the first and second embodiments and the modifications thereof, the present invention is applied to an air conditioner as a refrigeration apparatus including a receiver. However, the present invention is applied to a refrigeration apparatus including an accumulator to obtain a plate-type refrigerant. An accumulator may be incorporated in the piping system parts.

(D)
In the second embodiment and the modification, the collar member 174 is formed on the plate member 162 and joined to the lid member 191. However, the joint member 191 and the stepped portion 179 of the plate member 163 are sufficiently resistant to pressure strength. Can be increased, the collar 174 is not necessarily provided. Thereby, when joining using laser welding like the modification of 2nd Embodiment, welding with the cover member 191 and the collar part 174 becomes unnecessary, and a joining part can be reduced, Therefore Workability at the time of further improvement.

  If the present invention is used, in a plate-type refrigerant piping system part for a refrigeration apparatus in which a refrigerant piping system in which a refrigerant flows inside is formed by laminating and joining plate members, a large capacity such as an accumulator or a receiver is provided. A pressure vessel can be incorporated.

It is a figure which shows the schematic refrigerant circuit of the air conditioning apparatus as a freezing apparatus concerning one Embodiment of this invention. It is a front view of the plate type refrigerant piping system component concerning a 1st embodiment. It is a side view of plate type refrigerant piping system parts concerning a 1st embodiment. It is a top view of plate type refrigerant piping system parts concerning a 1st embodiment. It is a schematic diagram which shows the refrigerant | coolant piping system of the gas side part of a refrigerant circuit, Comprising: The part integrated in plate type refrigerant | coolant piping system components is shown. It is a schematic diagram which shows the refrigerant | coolant piping system of the liquid side part of a refrigerant circuit, Comprising: The part integrated in plate-type refrigerant | coolant piping system components is shown. It is AA sectional drawing of FIG. 2, Comprising: It is a figure which shows the receiver of 1st Embodiment. It is BB sectional drawing of FIG. 2, Comprising: It is a figure which shows a filter. It is AA sectional drawing of FIG. 2, Comprising: It is a figure which shows the receiver of the modification of 1st Embodiment. It is a front view of the plate-type refrigerant | coolant piping system component concerning 2nd Embodiment. It is AA sectional drawing of FIG. 10, Comprising: It is a figure which shows the receiver of 2nd Embodiment. It is AA sectional drawing of FIG. 10, Comprising: It is a figure which shows the receiver of the modification of 2nd Embodiment.

Explanation of symbols

37, 137 Receiver 61, 161 Plate type refrigerant piping system parts 62, 63, 162, 163 Plate member 64 Compressor suction pipe system 65, 165 Receiver system 66 Liquid side filter system 78 Backing metal 174 Hook 179 Stepped portion 191 Lid Member S Space

Claims (4)

A plate-type refrigerant piping system component (161) for a refrigeration apparatus in which a refrigerant piping system (64, 165, 66) through which a refrigerant flows by bonding plate members together is formed,
A lid member (191);
A container portion (137) having a step portion (179) into which the outer peripheral end (193) of the lid member is fitted, and having a hollow space (S) inside by fitting the outer peripheral end of the lid member into the step portion. ) Forming a first plate member (163);
A second plate member (162) bonded to and bonded to the first plate member,
The lid member is joined to the stepped portion,
The second plate member has a flange portion ( 174 ) arranged so as to overlap the lid member along the fitting direction of the lid member in a state where the lid member is fitted into the first plate member. Have
The lid member is also joined to the collar portion,
Plate-type refrigerant piping system component for a refrigeration system (161). The plate-type refrigerant pipe for a refrigeration apparatus according to claim 1 , wherein the lid member (191), the first plate member (163), and the second plate member (162) are joined by brazing in a furnace. System component (161). The plate-type refrigerant piping system component for a refrigeration apparatus according to claim 1 , wherein the lid member (191), the first plate member (163), and the second plate member (162) are joined by laser welding. (161). The plate-type refrigerant piping system for a refrigeration apparatus according to any one of claims 1 to 3 , wherein the lid member (191), the first plate member (163), and the second plate member (162) are made of steel. Part (161).

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