Heat exchanger and method for manufacturing heat exchanger

Abstract

To provide a heat exchanger with improved heat exchange efficiency.SOLUTION: A heat exchanger has: a heat exchange tube 12A in which low-pressure flow paths 18L through which low-pressure refrigerant flows and high-pressure flow paths 18H through which high-pressure refrigerant flows are alternately formed in one direction; and a block connected to both ends of the heat exchange tube 12A in a refrigerant flow direction, and having low-pressure joints that communicate with the plurality of low-pressure flow paths 18L and high-pressure joints that communicate with the plurality of high-pressure flow paths 18H.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a heat exchanger and a method for manufacturing the heat exchanger.

Background Art

[0002] As heat exchangers, for example, the heat exchangers described in Patent Document 1 and Patent Document 2 are known. The heat exchanger described in Patent Document 1 uses a porous flat tube in which a large number of fluid flow path holes are arranged in a plurality of rows in the cross-sectional thickness direction, with the fluid flow path hole row on one side serving as a low-pressure fluid flow path and the fluid flow path hole row on the other side serving as a high-pressure fluid flow path to perform heat exchange between the low-pressure fluid and the high-pressure fluid. In addition, the heat exchanger described in Patent Document 2 discloses a configuration in which a flat low-pressure tube through which a low-pressure refrigerant flows and a flat high-pressure tube through which a high-pressure refrigerant flows are laminated, or a configuration in which a flat low-pressure tube and a flat high-pressure tube are integrated.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in any of the heat exchangers, there has been room for improvement in heat exchange efficiency. An object of the present disclosure is to provide a heat exchanger with improved heat exchange efficiency and a method for manufacturing the heat exchanger.

Means for Solving the Problems

[0005] The heat exchanger according to the first aspect includes a channel member in which a low-pressure channel through which a low-pressure refrigerant flows and a high-pressure channel through which a high-pressure refrigerant flows are alternately formed in one direction, and a block attached to both ends of the refrigerant flow direction of the channel member and having a low-pressure joint connected to a plurality of the low-pressure channels and a high-pressure joint connected to a plurality of the high-pressure channels.

[0006] In the heat exchanger according to the first aspect, for example, when a high-pressure refrigerant is introduced into the high-pressure joint of one block, the high-pressure refrigerant flows through the high-pressure channel of the channel member and is discharged from the high-pressure joint of the other block. Also, for example, when a low-pressure refrigerant is introduced into the low-pressure joint of one block, the low-pressure refrigerant flows through the low-pressure channel of the channel member and is discharged from the low-pressure joint of the other block. Note that, for example, a high-pressure refrigerant may be introduced into the high-pressure joint of one block and a low-pressure refrigerant may be introduced into the low-pressure joint of the other block.

[0007] In the channel member, by flowing a high-pressure refrigerant through the high-pressure channel and a low-pressure refrigerant through the low-pressure channel, heat exchange can be performed between the high-pressure refrigerant and the low-pressure refrigerant between the adjacent high-pressure channel and low-pressure channel.

[0008] In the channel member, since the high-pressure channel and the low-pressure channel are alternately formed in one direction, for example, low-pressure channels are arranged on both sides of the high-temperature channel, and the high-pressure refrigerant in the high-pressure channel can exchange heat with the low-pressure refrigerant in the two low-pressure channels on both sides, improving the heat exchange efficiency compared to the case where the low-pressure channel is arranged only on one side of the high-pressure channel.

[0009] The heat exchanger according to the second aspect is the heat exchanger according to the first aspect, wherein the channel member is configured to include a first channel member and a second channel member, and the first channel member and the second channel member are arranged such that the direction of the width direction of the first channel member and the direction of the width direction of the second channel member intersect each other.

[0010] In the heat exchanger according to the second aspect, the first flow path member and the second flow path member can be arranged, for example, in an L shape. Thereby, an accumulator used in a refrigeration cycle connected to the heat exchanger can be arranged at a corner portion formed by the first flow path member and the second flow path member. Therefore, when the accumulator is connected to and integrated with the heat exchanger, the installation space for the heat exchanger and the accumulator can be reduced.

[0011] In the heat exchanger according to the third aspect, in the heat exchanger according to the first aspect, the flow path member is configured to include a first flow path member, a second flow path member, and a third flow path member. The first flow path member and the second flow path member are arranged so that their respective side surfaces face each other with a gap therebetween. The first flow path member, the second flow path member, and the third flow path member are arranged such that the direction of the side surface of the third flow path member intersects the side surfaces of the first flow path member and the second flow path member on one side in the width direction of the first flow path member and the second flow path member.

[0012] In the heat exchanger according to the third aspect, the first flow path member, the second flow path member, and the third flow path member can be arranged, for example, in a U shape. Thereby, an accumulator used in a refrigeration cycle connected to the heat exchanger can be arranged in a portion surrounded by the first flow path member, the second flow path member, and the third flow path member. Therefore, when the accumulator is connected to and integrated with the heat exchanger, the installation space for the heat exchanger and the accumulator can be reduced.

[0013] The heat exchanger according to the fourth aspect is the heat exchanger according to the first aspect, in which the flow path member is configured to include a first flow path member, a second flow path member, a third flow path member, and a fourth flow path member. The first flow path member and the second flow path member are arranged so that their respective side surfaces face each other with a gap therebetween. The third flow path member and the fourth flow path member are arranged so that their respective side surfaces face each other with a gap therebetween. The first flow path member, the second flow path member, the third flow path member, and the fourth flow path member are arranged such that the direction of the side surfaces of the third flow path member and the fourth flow path member intersects the direction of the side surfaces of the first flow path member and the second flow path member.

[0014] In the heat exchanger according to the fourth aspect, the first flow path member, the second flow path member, the third flow path member, and the fourth flow path member can be arranged, for example, in a rectangular shape. Thereby, an accumulator used in a refrigeration cycle connected to the heat exchanger can be arranged, for example, in a portion surrounded by the first flow path member, the second flow path member, the third flow path member, and the fourth flow path member. Therefore, when the accumulator is connected to and integrated with the heat exchanger, the installation space for the heat exchanger and the accumulator can be reduced.

[0015] The method for manufacturing a heat exchanger according to the fifth aspect is a method for manufacturing a heat exchanger according to any one of the first to fourth aspects, including a brazing step of passing the flow path member through the block and brazing the flow path member to the block; a low-pressure communication flow path processing step of processing a low-pressure communication flow path communicating with the low-pressure flow path on a side surface of the flow path member after the brazing step; a high-pressure communication flow path processing step of processing a high-pressure communication flow path communicating with the high-pressure flow path on a side surface of the flow path member after the brazing step; a low-pressure joint attachment step of attaching the low-pressure joint to the block so as to communicate with the low-pressure communication flow path after the low-pressure communication flow path processing step; and a high-pressure joint attachment step of attaching the high-pressure joint to the block so as to communicate with the high-pressure communication flow path after the high-pressure communication flow path processing step.

[0016] In the brazing step, the flow path member is passed through the block and brazed to the block. The low-pressure communication flow path processing step is performed after the brazing step and processes a low-pressure communication flow path communicating with the low-pressure flow path on the side surface of the flow path member. The high-pressure communication flow path processing step is performed after the brazing step and processes a high-pressure communication flow path communicating with the high-pressure flow path on the side surface of the flow path member. The low-pressure joint attachment step is performed after the low-pressure communication flow path processing step and attaches the low-pressure joint to the block so as to communicate with the low-pressure communication flow path. The high-pressure joint attachment step is performed after the high-pressure communication flow path processing step and attaches the high-pressure joint to the block so as to communicate with the high-pressure communication flow path.

[0017] If a channel member with a pre-processed low-pressure communication channel and a high-pressure communication channel is brazed to a block, when the brazing material is melted, the brazing material may flow into the channels, causing the low-pressure communication channel and the high-pressure communication channel to become narrower or blocked. In the method for manufacturing a heat exchanger according to the fifth aspect, since the low-pressure communication channel and the high-pressure communication channel are processed after brazing the channel member to the block, there is no unnecessary brazing material in the low-pressure communication channel and the high-pressure communication channel, and the low-pressure communication channel can be reliably connected to the low-pressure channel, and the high-pressure communication channel can be reliably connected to the high-pressure channel.

[0018] As a result, the low-pressure refrigerant can be reliably introduced into the low-pressure channel from one low-pressure joint, and the low-pressure refrigerant can be reliably discharged from the other low-pressure joint. Also, the high-pressure refrigerant can be reliably introduced into the high-pressure channel from one high-pressure joint, and the high-pressure refrigerant can be reliably discharged from the other high-pressure joint.

[0019] Note that the low-pressure communication channel processing step and the high-pressure communication channel processing step may be performed in either order or simultaneously. Also, the low-pressure joint attachment step and the high-pressure joint attachment step may be performed in either order or simultaneously.

Advantages of the Invention

[0020] As described above, the heat exchanger of the present disclosure can improve the heat exchange efficiency.

[0021] Also, according to the method for manufacturing a heat exchanger of the present disclosure, a heat exchanger with improved heat exchange efficiency can be manufactured.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

[0023] The heat exchanger 10 according to an embodiment of the present disclosure will be described with reference to Figs. 1 to 10. As shown in FIG. 2, the heat exchanger 10 of the present embodiment includes a heat exchange tube 12A as an example of the first flow path member of the present disclosure, a heat exchange tube 12B as an example of the second flow path member of the present disclosure, a first block 14, and a second block 16 connected to the heat exchange tube 12A and the heat exchange tube 12B.

[0024] Since the heat exchange tube 12A and the heat exchange tube 12B have the same configuration, the heat exchange tube 12A will be described below as a representative. As shown in FIG. 1(A), the heat exchange tube 12A is a tube formed in a flat shape made of a metal material, in which a low-pressure flow path 18L through which a low-pressure refrigerant flows and a high-pressure flow path 18H through which a high-pressure refrigerant flows are alternately arranged in one direction (longitudinal direction when looking at the end face). In other words, the low-pressure flow path 18L and the high-pressure flow path 18H are alternately arranged in a straight line. The heat exchange tube 12A is, for example, extruded from a metal material such as aluminum.

[0025] In the heat exchange tube 12A of the present embodiment, as an example, the inner diameter of the low-pressure flow path 18L and the inner diameter of the high-pressure flow path 18H are the same inner diameter, but the inner diameter of the low-pressure flow path 18L and the inner diameter of the high-pressure flow path 18H may be different. For example, the inner diameter of the high-pressure flow path 18H may be smaller than that of the low-pressure flow path 18L.

[0026] In the heat exchange tube 12A of the present embodiment, as an example, five low-pressure flow paths 18L and four high-pressure flow paths 18H are provided, and the low-pressure flow path 18L is arranged on the outermost side in the width direction of the heat exchange tube 12A.

[0027] (First block) As shown in FIG. 2, the first block 14 is a metal block formed in an L shape, having a first tube mounting portion 14A formed in a thick plate shape, and a second tube mounting portion 14B formed in a thick plate shape extending in a direction intersecting the first tube mounting portion 14A, in this embodiment, in a direction perpendicular to the first tube mounting portion 14A, from one end of the first tube mounting portion 14A. Note that the first tube mounting portion 14A is an example of the block of the present disclosure, and the second tube mounting portion 14B is also an example of the block of the present disclosure. In this embodiment, the first tube mounting portion 14A and the second tube mounting portion 14B are integrated, but they may also be separate. Note that in this embodiment, the direction of the first tube mounting portion 14A and the direction of the second tube mounting portion 14B are in a 90° relationship. Note that in this embodiment, intersection refers to 90°, but it does not necessarily have to be 90°. As an example, it may be different by about ±10° based on 90°.

[0028] (First tube mounting portion) As shown in FIG. 3, on the side surface 14Aa of the first tube mounting portion 14A, a concave portion 20 is formed on the upper side, and a concave portion 22 is formed on the lower side.

[0029] As shown in FIGS. 4, 5, and 8, a part of the upper end side of the heat exchange tube 12A penetrates through the concave portion 20 and the concave portion 22 in the first tube mounting portion 14A, and the side surface of the heat exchange tube 12A is exposed inside the concave portion 20 and the concave portion 22. The upper end portion of the heat exchange tube 12A terminates inside the first tube mounting portion 14A of the first block 14.

[0030] As shown in FIG. 4, a low-pressure communication flow path 24L communicating with the low-pressure flow path 18L is formed on the side surface of the heat exchange tube 12A exposed in the concave portion 20.

[0031] As shown in FIG. 5, a high-pressure communication flow path 24H communicating with the high-pressure flow path 18H is formed on the side surface of the heat exchange tube 12A exposed in the concave portion 22.

[0032] The heat exchange tube 12A is brazed (an example of the brazing process of the present disclosure) to the first block 14. The low-pressure communication passage 24L and the high-pressure communication passage 24H are post-processed (an example of the low-pressure communication passage processing process and the high-pressure communication passage processing process of the present disclosure) with a drill or the like after brazing the heat exchange tube 12A to the first block 14. Therefore, the low-pressure flow path 18L and the recess 20 can be surely communicated via the low-pressure communication passage 24L, and the high-pressure flow path 18H and the recess 22 can be surely communicated via the high-pressure communication passage 24H. Note that the low-pressure communication passage 24L and the high-pressure communication passage 24H of other parts described later are also post-processed after brazing.

[0033] As shown in FIGS. 2 and 4, a first joint 26 as an example of a low-pressure joint is attached to the opening portion of the recess 20 through a low-pressure joint attachment process as an example of the present disclosure. The connection port 26A of the first joint 26 communicates with the recess 20 via the flow path 26B.

[0034] As shown in FIGS. 2 and 5, a second joint 28 as an example of a high-pressure joint is attached to the opening portion of the recess 22 through a high-pressure joint attachment process as an example of the present disclosure. The connection port 28A of the second joint 28 communicates with the recess 22 via the flow path 28B.

[0035] (Second tube attachment portion) As shown in FIG. 3, a recess 30 is formed on the upper side and a recess 32 is formed on the lower side on the side surface 14Ba of the second tube attachment portion 14B.

[0036] As shown in FIGS. 4, 5, and 8, a part of the upper end side of the heat exchange tube 12B penetrates the recess 30 and the recess 32 in the second tube attachment portion 14B of the second tube attachment portion 14B, and the side surface of the heat exchange tube 12B is exposed inside the recess 30 and the recess 32. The upper end portion of the heat exchange tube 12B terminates within the second tube attachment portion 14B of the first block 14.

[0037] As shown in FIG. 4, a low-pressure communication passage 24L communicating with the low-pressure passage 18L is formed on the side surface of the heat exchange tube 12B exposed in the recess 30.

[0038] As shown in FIG. 5, a high-pressure communication passage 24H communicating with the high-pressure passage 18H is formed on the side surface of the heat exchange tube 12B exposed in the recess 32.

[0039] As shown in FIGS. 2 and 4, a third joint 34 as an example of a low-pressure joint is attached to the opening portion of the recess 30. The connection port 34A of the third joint 34 communicates with the recess 30 through the flow passage 34B.

[0040] As shown in FIGS. 2 and 5, a fourth joint 36 as an example of a high-pressure joint is attached to the opening portion of the recess 32. The connection port 36A of the fourth joint 36 communicates with the recess 32 through the flow passage 36B.

[0041] (Second block) As shown in FIG. 2, the second block 16 is a metal block having an overall L shape, which has a first tube mounting portion 16A formed in a thick plate shape and a second tube mounting portion 16B formed in a thick plate shape extending in a direction orthogonal to the first tube mounting portion 16A from one end of the first tube mounting portion 16A.

[0042] As shown in FIG. 3, a recess 38 is formed on the upper side and a recess 40 is formed on the lower side on the side surface 16Aa of the first tube mounting portion 16A.

[0043] As shown in FIGS. 6 and 7, a part of the lower end side of the heat exchange tube 12A penetrates the recesses 38 and 40 in the first tube mounting portion 16A, and the side surface of the heat exchange tube 12A is exposed inside the recesses 38 and 40.

[0044] As shown in FIG. 6, the heat exchange tube 12A exposed in the recess 38 has the high-pressure passage 18H communicating with the recess 38 through the high-pressure communication passage 24H. Note that the opening portion of the recess 38 is closed by a lid 42.

[0045] As shown in FIG. 7, the heat exchange tube 12A exposed in the recess 40 has a low-pressure flow path 18L communicating with the recess 40 via a low-pressure communication flow path 24L. Note that the opening of the recess 40 is closed by a lid 44.

[0046] As shown in FIG. 3, a recess 46 is formed on the upper side and a recess 48 is formed on the lower side on the side surface 16Ba of the second tube mounting portion 16B.

[0047] As shown in FIG. 6, the heat exchange tube 12B exposed in the recess 46 has a high-pressure flow path 18H communicating with the recess 46 via a high-pressure communication flow path 24H. Note that the opening of the recess 46 is closed by a lid 50. Further, this recess 46 communicates with the recess 38 via a flow path 52.

[0048] As shown in FIG. 7, the heat exchange tube 12B exposed in the recess 48 has a low-pressure flow path 18L communicating with the recess 48 via a low-pressure communication flow path 24L. Note that the opening of the recess 48 is closed by a lid 54. Further, this recess 48 communicates with the recess 40 via a flow path 56.

[0049] As shown in FIG. 9(A), in the heat exchanger 10 of the present embodiment, a cylindrical accumulator 112 described below can be disposed at a position facing the side surface of the heat exchange tube 12A and the side surface of the heat exchange tube 12B, in other words, at a corner portion formed by the side surface of the heat exchange tube 12A and the side surface of the heat exchange tube 12B.

[0050] (Accumulator) As shown in FIGS. 9(A) and 9(B), the accumulator 112 is formed in a cylindrical shape extending in the vertical direction, for example, a bottomed cylindrical shape, and is capable of temporarily storing a low-temperature refrigerant inside. A double tube 120 is provided inside the accumulator 112. For example, a cylindrical support portion 118 is provided at the center of the bottom of the accumulator 112. The lower end of the outer tube 122 of the double tube 120 is supported inside the support portion 118. The upper end of the outer tube 122 is open inside the accumulator 112 near the upper end of the accumulator 112. An inner tube 124 is provided inside the outer tube 122. The upper end of the inner tube 124 is inserted into and fixed to a joint portion 116 described later. The lower end of the inner tube 124 is open inside the outer tube 122 at the lower part of the outer tube 122.

[0051] As shown in FIG. 9(B), the axial lower end (bottom surface) of the accumulator 112 is formed flat. This "flat" means that there are no protrusions or the like on the lower end of the accumulator 112 that interfere with surrounding devices.

[0052] The inlet 131 of the low-temperature refrigerant of the accumulator 112 opens in a tangential direction with respect to the inner wall of the accumulator 112. The low-temperature refrigerant flows in from the inlet 131 in the tangential direction and descends spirally along the inner wall of the accumulator 112. The low-temperature refrigerant is stored outside the outer tube 122 in the accumulator 112. In FIG. 9(B), an example of the liquid level 126 of the low-temperature refrigerant is shown. As an example, CO2 can be used as the refrigerant, but other substances than CO2 may also be used.

[0053] As shown in FIGS. 9(A) and 9(B), the joint portion 116 is provided at the upper part of the accumulator 112, and an outlet 132 for the low-temperature refrigerant is provided. The outlet 132 is connected to the first joint 26 of the heat exchanger 10 via the joint 58, the pipe 60, and the joint 62.

[0054] The heat exchanger 10 and the accumulator 112 according to the present embodiment are incorporated and used in a refrigeration cycle.

[0055] The connection port 36A in the fourth joint 36 of the heat exchanger 10 is connected, for example, downstream of a condenser (not shown) in the refrigeration cycle. Further, the connection port 28A of the second joint 28 is connected, for example, upstream of an expansion valve (not shown) in the refrigeration cycle.

[0056] The inlet 131 of the low-temperature refrigerant of the accumulator 112 is connected, for example, downstream of an evaporator (not shown) in the refrigeration cycle. Further, the connection port 34A of the third joint 34 of the heat exchanger 10 is connected, for example, upstream of a compressor (not shown) in the refrigeration cycle.

[0057] In the accumulator 112, the low-temperature refrigerant is liquefied and stored. When a negative pressure acts on the outlet 132 of the low-temperature refrigerant by the compressor, the low-temperature refrigerant in the accumulator 112 vaporizes, enters the inside from the upper end of the outer pipe 122 and descends, then enters the inside from the lower end of the inner pipe 124 and ascends, and flows through the outlet 132, the joint 58, the pipe 60, and the joint 62 to the first joint 26 of the heat exchanger 10.

[0058] The low-temperature and low-pressure refrigerant that has flowed into the heat exchanger 10 flows through the low-pressure flow paths 18L of the heat exchange tubes 12A and 12B and reaches the third joint 34. On the other hand, the high-temperature refrigerant flows in from the fourth joint 36, flows through the high-pressure flow paths 18H of the heat exchange tube 12B and the heat exchange tube 12A, and reaches the second joint 28. As shown in FIG. 10, in the present embodiment, the flow directions of the low-temperature and low-pressure refrigerant flowing through the low-pressure flow path 18L and the high-temperature refrigerant flowing through the high-pressure flow path 18H are opposite in the heat exchange tube, and heat exchange is performed between the high-pressure refrigerant and the low-pressure refrigerant.

[0059] In the heat exchange tubes 12A and 12B, since the high-pressure flow paths 18H through which the high-pressure refrigerant flows and the low-pressure flow paths 18L through which the low-pressure refrigerant flows are alternately arranged in one direction, the heat exchange efficiency can be improved as compared with the case where the high-pressure flow paths 18H and the low-pressure flow paths 18L are not alternately arranged.

[0060] In this embodiment, since the heat exchanger 10 is disposed at a corner portion formed by the heat exchange tubes 12A and 12B in a relationship where the accumulators 112 cross each other, the installation spaces for the heat exchanger 10 and the accumulators 112 can be reduced.

[0061] In the heat exchanger 10 of this embodiment, after brazing the heat exchange tubes 12A (12B), the low-pressure communication flow path 24L and the high-pressure communication flow path 24H are post-processed, so that the low-pressure communication flow path 24L and the high-pressure communication flow path 24H can be surely communicated.

[0062] [Other Embodiments] As described above, one embodiment of the present disclosure has been described. However, the present disclosure is not limited to the above, and it goes without saying that various modifications can be made without departing from the gist thereof.

[0063] In the heat exchanger 10 of the above embodiment, two heat exchange tubes 12A and 12B are used, but three or more heat exchange tubes 12 may be provided for one heat exchanger 10. For example, as shown in FIG. 11, the accumulator 112 may be surrounded from three directions by three heat exchange tubes 12 arranged in a substantially U shape (C shape), or as shown in FIG. 12, the accumulator 112 may be surrounded from four directions by four heat exchange tubes 12 arranged in a rectangular shape. In either case, the installation spaces for the heat exchanger 10 and the accumulators 112 can be reduced.

[0064] In the heat exchanger 10 of the above embodiment, as shown in FIG. 10, the flow directions of the low-pressure refrigerant flowing through the low-pressure flow path 18L and the high-pressure refrigerant flowing through the high-pressure flow path 18H are opposite in the heat exchange tube. However, the flow directions of the low-pressure refrigerant flowing through the low-pressure flow path 18L and the high-pressure refrigerant flowing through the high-pressure flow path 18H may be the same direction.

[0065] In the above-described embodiment, five low-pressure flow paths 18L and four high-pressure flow paths 18H are formed in one heat exchange tube 12A (12B). However, the number of low-pressure flow paths 18L and the number of high-pressure flow paths 18H formed in the heat exchange tube 12A (12B) are not limited to this. For example, at a minimum, two low-pressure flow paths 18L and one high-pressure flow path 18H may be provided, or one low-pressure flow path 18L and two high-pressure flow paths 18H may be provided.

[0066] In the first block 14 of the above-described embodiment, the first tube attachment portion 14A and the second tube attachment portion 14B are integrated in an L shape. However, the first tube attachment portion 14A and the second tube attachment portion 14B may be configured as separate blocks.

[0067] In the above-described embodiment, the low-pressure flow path 18L and the high-pressure flow path 18H are arranged in a straight line. However, the low-pressure flow path 18L and the high-pressure flow path 18H may be arranged in an arc shape. In this case, the heat exchange tube 12A (12B) may be curved along the outer peripheral surface of the accumulator 112.

Explanation of Reference Numerals

[0068] 10 Heat exchanger 12 Heat exchange tube (flow path member) 12A Heat exchange tube (first flow path member) 12B Heat exchange tube (second flow path member) 14 First block (block) 18L Low-pressure flow path 18H High-pressure flow path 26 First joint (low-pressure joint) 28 Second joint (high-pressure joint) 34 Third joint (low-pressure joint) 36 Fourth joint (high-pressure joint)

Claims

1. A flow path member in which a low-pressure flow path through which a low-pressure refrigerant flows and a high-pressure flow path through which a high-pressure refrigerant flows are alternately formed in one direction, A block having a low-pressure joint connected to both ends in the refrigerant flow direction of the flow path member and communicating with a plurality of the low-pressure flow paths, and a high-pressure joint communicating with a plurality of the high-pressure flow paths attached thereto, A heat exchanger having the above.

2. The flow path member is configured to include a first flow path member and a second flow path member, The first flow path member and the second flow path member are arranged such that the direction of the width direction of the first flow path member and the direction of the width direction of the second flow path member intersect each other, The heat exchanger according to Claim 1.

3. The flow path member is configured to include a first flow path member, a second flow path member, and a third flow path member, The first flow path member and the second flow path member are arranged so as to be separated from each other with their side surfaces facing each other, On one side in the width direction of the first flow path member and the second flow path member, the side surfaces of the first flow path member, the second flow path member, and the third flow path member are arranged such that the direction of the side surface of the third flow path member intersects the side surfaces of the first flow path member and the second flow path member, The heat exchanger according to Claim 1.

4. The flow path member is configured to include a first flow path member, a second flow path member, a third flow path member, and a fourth flow path member, The first flow path member and the second flow path member are arranged so as to be separated from each other with their side surfaces facing each other, The third flow path member and the fourth flow path member are separated from each other with their side surfaces facing each other, and the first flow path member, the second flow path member, the third flow path member, and the fourth flow path member are arranged such that the direction of the side surface of the third flow path member and the side surface of the fourth flow path member intersect the direction of the side surface of the first flow path member and the side surface of the second flow path member, The heat exchanger according to Claim 1.

5. A method for manufacturing the heat exchanger according to any one of Claims 1 to 4, A brazing step of brazing the flow path member to the block by passing the flow path member through the block, A low-pressure communication flow path processing step of processing a low-pressure communication flow path communicating with the low-pressure flow path on the side surface of the flow path member after the brazing step, A high-pressure communication flow path processing step of processing a high-pressure communication flow path communicating with the high-pressure flow path on the side surface of the flow path member after the brazing step, A low-pressure joint attachment step of attaching the low-pressure joint to the block so as to communicate with the low-pressure communication flow path after the low-pressure communication flow path processing step, After the step of machining the high-pressure communication flow path, a high-pressure joint attachment step of attaching the high-pressure joint to the block so as to communicate with the high-pressure communication flow path; A method for manufacturing a heat exchanger having the same.

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