Heat exchanger and method for manufacturing heat exchanger

Abstract

To effectively join component members of a heat exchanger.SOLUTION: Provided is a method for manufacturing a heat exchanger including a plurality of layer members (110) and partition wall members (120), wherein each of the plurality of layer members (110) includes a flow passage member (111) and a spacer member (112) disposed on a direction side perpendicular to a stacking direction (V1) of the layer members (110) with respect to the flow passage member (111). The method for manufacturing the heat exchanger includes a step of joining the flow passage member (111), the spacer member (112), and the partition wall member (120). By performing the joining, at least one member among the flow passage member (111) and the spacer member (112) is deformed so as to reduce a dimensional difference in the stacking direction (V1) between the flow passage member (111) and the spacer member (112) that are adjacent to one other in the perpendicular direction.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] Patent Document 1 discloses a heat exchanger. The heat exchanger disclosed in Patent Document 1 has a structure in which a plurality of stages of fluid passages are formed by stacking tube plates (partition members) with a pair of spacer bars (spacer members) interposed therebetween. In each fluid passage, corrugated fins (flow path members) are disposed along the flow direction thereof.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As a method for manufacturing a heat exchanger, for example, there is a method of joining the constituent members of the heat exchanger by brazing. However, due to the thickness of the roll material used as the material of the heat exchanger and the variation in press forming, there may be a difference of about several tens of μm in the height between the constituent members of each layer of the heat exchanger. Due to this difference in height, the brazing material may not fill the joint surfaces between the constituent members of the heat exchanger, resulting in the generation of gaps between the joint surfaces and the occurrence of poor joints.

[0005] An object of the present disclosure is to provide a method for manufacturing a heat exchanger capable of effectively joining the constituent members of the heat exchanger.

Means for Solving the Problems

[0006] The first aspect is a method for manufacturing a heat exchanger, which includes a plurality of stacked layer members (110) and partition members (120) disposed between adjacent layer members (110). Each of the plurality of layer members (110) includes a flow path member (111) that forms a flow path for a refrigerant, and a spacer member (112) disposed on a side in a direction perpendicular to the stacking direction (V1) of the layer member (110) with respect to the flow path member (111). The method for manufacturing a heat exchanger includes a joining step of joining the flow path member (111), the spacer member (112), and the partition member (120). By performing the joining, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce a dimensional difference in the stacking direction (V1) between the flow path member (111) and the spacer member (112) adjacent to each other in the perpendicular direction.

[0007] In the first aspect, the constituent members of the heat exchanger can be effectively joined.

[0008] The second aspect is, in the first aspect, in the joining step, the flow path member (111), the spacer member (112), and the partition member (120) are diffusion-joined.

[0009] In the second aspect, the heat exchanger can be easily manufactured.

[0010] The third aspect is, in the first or second aspect, before the diffusion joining, in the stacking direction (V1), the dimension of the flow path member (111) is larger than the dimension of the spacer member (112), and by performing the diffusion joining, the flow path member (111) is deformed so that the dimension of the flow path member (111) becomes smaller in the stacking direction (V1).

[0011] In the third aspect, by deforming the flow path member (111), the dimensional difference between the flow path member (111) and the spacer member (112) can be absorbed.

[0012] In a fourth aspect, in the second or third aspect, the surface pressure at the contact point between the flow path member (111) and the partition member (120) immediately after the diffusion bonding is 1 MPa or more.

[0013] In the fourth aspect, the partition member (120) and the flow path member (111) can be joined such that the surface pressure at the contact point between the flow path member (111) and the partition member (120) immediately after the diffusion bonding is 1 MPa or more.

[0014] In a fifth aspect, in any one of the second to fourth aspects, the flow path member (111) includes a triangular shape, a trapezoidal shape, a circular shape, or a sinusoidal curve shape in a cross-sectional view, and is deformed by being pressurized during the diffusion bonding.

[0015] In the fifth aspect, the flow path member (111) can be plastically deformed to diffusion bond the flow path member (111), the spacer member (112), and the partition member (120).

[0016] In a sixth aspect, in any one of the second to fifth aspects, the flow path member (111) is joined to one partition member (120) at a plurality of joining locations (YA), the plurality of joining locations (YA) are arranged at intervals along the vertical direction, and after the diffusion bonding, when the dimension in the vertical direction of adjacent joining locations (YA) is P and the dimension in the stacking direction (V1) of the flow path member (111) is h, the relationship of (2 / 5)P < h < (2 / 3)P, or (2 / 5)h < P < (2 / 3)h holds.

[0017] In the sixth aspect, the flow path member (111) can be designed such that the relationship of (2 / 5)P < h < (2 / 3)P, or (2 / 5)h < P < (2 / 3)h holds.

[0018] Aspect 7 is such that, in any one of Aspects 2 to 6, the flow path member (111) is formed such that a certain unit shape is repeatedly arranged along the vertical direction, and the flow path member (111) is joined to one of the partition members (120) at a plurality of joining locations (YA) by the diffusion bonding. The plurality of joining locations (YA) are arranged at intervals along the vertical direction. Before the diffusion bonding, in a cross-sectional view of the flow path (R) formed by the flow path member (111), the length of half of the unit shape is defined as L, the dimension of the flow path member (111) in the stacking direction (V1) is defined as H, after the diffusion bonding, the dimension of the flow path member (111) in the stacking direction (V1) is defined as h, the dimension of one of the joining locations (YA) in the vertical direction is defined as a, and the dimension of the adjacent joining location (YA) in the vertical direction is defined as P. When 0 < a ≤ P / 2, for the difference Δ(H - h) between the dimension H of the flow path member (111) in the stacking direction (V1) before the diffusion bonding and the dimension h of the flow path member (111) in the stacking direction (V1) after the diffusion bonding, the following relationship of Formula 1 holds. (Formula 1) Δ(H - h) > L - (P / 2) - √{(L - 2a + P / 2)(L - P / 2)}.

[0019] In Aspect 7, the flow path member (111) can be designed such that the relationship of Δ(H - h) > L - (P / 2) - √{(L - 2a + P / 2)(L - P / 2)} holds.

[0020] The eighth aspect is a method for manufacturing a heat exchanger, comprising a plurality of stacked layer members (110) and partition members (120) disposed between adjacent layer members (110). Each of the plurality of layer members (110) includes a flow path member (111) forming a flow path for a refrigerant and a spacer member (112). Each of the plurality of flow path members (111) includes a first portion (1111) disposed on a side in a direction perpendicular to the stacking direction (V1) of the layer member (110) with respect to the spacer member (112), and a second portion (1112) sandwiched between the spacer member (112) and the partition member (120). The method for manufacturing a heat exchanger includes a step of joining the flow path member (111), the spacer member (112), and the partition member (120). By performing the joining, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce a dimensional difference in the stacking direction (V1) between a first member and a second member adjacent to each other in the perpendicular direction. The first member indicates the first portion (1111) of the flow path member (111), and the second member indicates the spacer member (112) and the second portion (1112) of the flow path member (111).

[0021] In the eighth aspect, the constituent members of the heat exchanger can be effectively joined.

[0022] The ninth aspect is, in any one of the first to eighth aspects, the refrigerant includes propane.

[0023] In the ninth aspect, a refrigerant containing propane can be flowed through the flow path of the heat exchanger.

[0024] The tenth aspect is, in any one of the second to eighth aspects, in the stacking direction (V1), the dimension of the flow path member (111) before the diffusion bonding is 2 mm or less.

[0025] In the tenth aspect, the heat exchanger can be miniaturized.

[0026] In the 11th aspect, in any one of the 1st to 3rd aspects, the apparent Young's modulus of the flow path member (111) is smaller than the Young's modulus of the spacer member (112).

[0027] In the 11th aspect, the flow path member (111) and the spacer member (112) can be joined to the partition member (120) so as to reduce the dimensional difference in the stacking direction (V1) between the flow path member (111) and the spacer member (112).

[0028] In the 12th aspect, in any one of the 1st to 3rd aspects and the 11th aspect, the flow path member (111) is formed of a foamed material.

[0029] In the 12th aspect, by forming the flow path member (111) of a foamed material, the apparent Young's modulus of the flow path member (111) can be reduced.

[0030] In the 13th aspect, in any one of the 1st to 3rd, 11th, and 12th aspects, the flow path member (111) includes a floor portion (111e) and a protruding portion (111d) protruding from the floor portion (111e), and in the vertical direction, the dimension of the protruding portion (111d) is smaller than the dimension of the floor portion (111e).

[0031] In the 13th aspect, a refrigerant flow path (R) can be formed in the space surrounded by the floor portion (111e) and the protruding portion (111d).

[0032] In the 14th aspect, in any one of the 1st to 3rd and 11th to 13th aspects, a hole (111da) is formed in the flow path member (111).

[0033] In the 14th aspect, by forming a hole (111da) in the flow path member (111), the apparent Young's modulus of the flow path member (111) can be reduced.

[0034] In the 15th aspect, in the 13th aspect, in the protruding portion (111d), a part thereof is thinner than another part.

[0035] In the 15th aspect, by making a part of the protruding portion (111d) thinner, the apparent Young's modulus of the flow path member (111) can be reduced.

[0036] In the 16th aspect, in the 13th aspect, in the protruding portion (111d), the area of the cross section perpendicular to the lamination direction (V1) changes.

[0037] In the 16th aspect, by changing the area of the cross section of the protruding portion (111d), the apparent Young's modulus of the flow path member (111) can be reduced.

[0038] In the 17th aspect, in any one of the 1st to 3rd, and 11th to 16th aspects, the material of the flow path member (111) is different from the material of the spacer member (112).

[0039] In the 17th aspect, the material of the flow path member (111) can be made different from the material of the spacer member (112) so that the apparent Young's modulus of the flow path member (111) is reduced.

[0040] In the 18th aspect, in any one of the 13th, 15th, and 16th aspects, a plurality of the protruding portions (111d) protrude from the floor portion (111e) toward one side (V11) in the lamination direction (V1), the floor portion (111e) is joined to the partition member (120) adjacent to the other side (V12) in the lamination direction (V1), the plurality of protruding portions (111d) are arranged at intervals along the perpendicular direction and are joined to the partition member (120) adjacent to one side (V11) in the lamination direction (V1), and a refrigerant flow path (R) is formed between the adjacent protruding portions (111d), the floor portion (111e), and the partition member (120) adjacent to one side (V11) in the lamination direction (V1).

[0041] In the 18th aspect, by narrowing a plurality of protruding portions (111d) so that a refrigerant flow path (R) is formed between adjacent protruding portions (111d), the apparent Young's modulus of the flow path member (111) can be reduced.

[0042] The heat exchanger according to the 19th aspect is manufactured by the manufacturing method of the heat exchanger according to any one of the 1st to 18th aspects.

[0043] In the 19th aspect, the constituent members of the heat exchanger can be effectively joined.

Brief Description of the Drawings

[0044]

Figure 1

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Figure 16

Embodiments for Carrying Out the Invention

[0045] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding. In each embodiment, modified example, and figure, the same or corresponding parts are denoted by the same reference numerals, and detailed descriptions and descriptions of the accompanying effects and the like are not repeated.

[0046] (1) First Embodiment The heat exchanger (1) according to the first embodiment is a device that performs heat exchange between a plurality of fluids. The heat exchanger (1) is formed of a metallic material such as stainless steel or aluminum, for example.

[0047] As shown in FIGS. 1 and 2, the heat exchanger (1) includes a laminate (100), a first plate member (200), and a second plate member (300).

[0048] (1-1) Overall Configuration The laminate (100) includes a plurality of layer members (110) and a partition member (120). The plurality of layer members (110) are laminated along a first direction (V1). The first direction (V1) indicates the lamination direction of the layer members (110). Each of the plurality of layer members (110) includes a flow path member (111) and a spacer member (112).

[0049] The flow path member (111) forms a flow path for the refrigerant. The flow path member (111) is, for example, a fin. The flow path member (111) includes a peak portion (111a) that protrudes toward one side (V11) in the first direction (V1) and a valley portion (111b) that protrudes toward the other side (V12) in the first direction (V1). The flow path member (111) has a corrugated plate shape in which the peak portion (111a) and the valley portion (111b) are alternately arranged (see FIGS. 8(a) and 8(b)).

[0050] The spacer member (112) secures an installation space for the flow path member (111). The spacer member (112) is arranged on the side in a direction perpendicular to the first direction (V1) (the lamination direction of the layer members (110)) with respect to the flow path member (111). In the present embodiment, a second direction (V2) and a third direction (V3) are defined as directions perpendicular to the first direction (V1). The first direction (V1), the second direction (V2), and the third direction (V3) are perpendicular to each other.

[0051] In this embodiment, the plurality of layer members (110) includes two types of layer members. The two types of layer members are composed of a first layer member (110A) and a second layer member (110B). The first layer member (110A) and the second layer member (110B) are alternately arranged along the first direction (V1). Note that the plurality of layer members (110) may include three or more types of layer members, and the three or more types of layer members may be repeatedly arranged in order along the first direction (V1).

[0052] Hereinafter, the flow path member (111) of the first layer member (110A) may be described as the first flow path member (111A), and the flow path member (111) of the second layer member (110B) may be described as the second flow path member (111B). Also, the spacer member (112) of the first layer member (110A) may be described as the first spacer member (112A), and the spacer member (112) of the second layer member (110B) may be described as the second spacer member (112B).

[0053] The ridges (111a) and valleys (111b) of the first flow path member (111A) extend along the third direction (V3). The first flow path member (111A) sends the refrigerant along the third direction (V3). The ridges (111a) and valleys (111b) of the second flow path member (111B) extend along the second direction (V2). The second flow path member (111B) sends the refrigerant along the second direction (V2). In this embodiment, the first flow path member (111A) and the second flow path member (111B) send the refrigerant in directions perpendicular to each other. Note that the direction in which the refrigerant is sent by the first flow path member (111A) of the first layer member (110A) and the direction in which the refrigerant is sent by the second flow path member (111B) are not particularly limited.

[0054] The first flow path member (111A) and the second flow path member (111B) send different types of refrigerants. In this embodiment, one of the first flow path member (111A) and the second flow path member (111B) sends propane as the refrigerant, and the other flow path member sends water as the refrigerant. Note that one of the first flow path member (111A) and the second flow path member (111B) may send propane as the refrigerant, and the other flow path member may send CO2 as the refrigerant. Also, one of the first flow path member (111A) and the second flow path member (111B) may send water as the refrigerant, and the other flow path member may send CO2 as the refrigerant.

[0055] The flow path member (111) forms a flow path (R) through which the refrigerant flows. Hereinafter, the refrigerant flowing through the first flow path (R1) formed by the first flow path member (111A) may be referred to as the first refrigerant, and the refrigerant flowing through the second flow path (R2) formed by the second flow path member (111B) may be referred to as the second refrigerant. The first flow path (R1) extends along the second direction (V2). The second flow path (R2) extends along the third direction (V3).

[0056] The partition member (120) is a flat plate-like member. The partition member (120) is disposed between adjacent layer members (110). In this embodiment, the partition member (120) is disposed between the first layer member (110A) and the second layer member (110B).

[0057] The first plate member (200) is a flat plate-like member. The first plate member (200) faces the laminate (100) from one side (V11) in the first direction (V1). The first plate member (200) is located on the one side (V11) (the uppermost stage) in the first direction (V1).

[0058] The second plate member (300) is a flat plate-like member. The second plate member (300) faces the laminate (100) from the other side (V12) in the first direction (V1). The second plate member (300) is located on the other side (V12) (the lowermost stage) in the first direction (V1).

[0059] As shown in FIG. 3, a piping member (P) is fixed to the outer surface of the heat exchanger (1). The piping member (P) is fixed to the outer surface of the heat exchanger (1) by, for example, welding (TIG welding). The piping member (P) includes a refrigerant pipe (P1) and a plate-like portion (P2). The refrigerant pipe (P1) is a tubular member for sending refrigerant. The plate-like portion (P2) is a plate-like member and is fixed to the outer surface of the heat exchanger (1). The refrigerant pipe (P1) is provided on the plate-like portion (P2). The plate-like portion (P2) is provided with holes through which the refrigerant passes, and the holes communicate with the inside of the refrigerant pipe (P1) and face the heat exchanger (1). Refrigerant is sent to the heat exchanger (1) through the refrigerant pipe (P1). In the present embodiment, a recess (400) is provided at a location on the outer surface of the heat exchanger (1) where the layer member (110) and the partition member (120) are located, and the piping member (P) is fixed to the edge of the recess (400) so that the refrigerant pipe (P1) communicates with the space between the outer surface of the heat exchanger (1) and the recess (400) (see FIGS. 5(a) to 6). In the heat exchanger (1), a total of four piping members (P) are provided on both sides in the second direction (V2) and on both sides in the third direction (V3). In FIGS. 1 to 3(b), only one piping member (P) is provided, and the illustration of the remaining three recesses (400) and refrigerant pipes (P1) is omitted. Note that the heat exchanger (1) may not be provided with the recess (400), and the piping member (P) may not be provided.

[0060] (1-2) Constituent Members of Heat Exchanger (1-2-1) First Plate Member As shown in FIG. 4(a), the first plate member (200) includes an opposing portion (201) and a corner portion (202). The opposing portion (201) faces the flow path member (111). The opposing portion (201) is provided at the central portion of the first plate member (200). The corner portion (202) includes a first corner (2021) to a fourth corner (2024) and is provided at the four corners of the first plate member (200).

[0061] (1-2-2) Second Plate Member As shown in FIG. 4(b), the second plate member (300) includes a facing portion (301) and a corner portion (302). The facing portion (301) faces the flow path member (111). The facing portion (301) is provided at the central portion of the second plate member (300). The corner portion (302) includes a first corner portion (3021) to a fourth corner portion (3024), and is provided at the four corners of the second plate member (300).

[0062] (1-2-3) First spacer member As shown in FIG. 5(a), the first spacer member (112A) includes an arrangement portion (112A1), a corner portion (112A2), a pair of first frame portions (112A3), and a pair of second frame portions (112A4). The pair of first frame portions (112A3) extend parallel to each other along the third direction (V3) while being separated from each other along the second direction (V2). The pair of second frame portions (112A4) extend parallel to each other along the second direction (V2) while being separated from each other along the third direction (V3). The pair of first frame portions (112A3) and the pair of second frame portions (112A4) form a substantially rectangular frame, and the arrangement portion (112A1) is located inside the frame. The arrangement portion (112A1) is provided for arranging the first flow path member (111A), and is a space that penetrates the first spacer member (112A) along the first direction (V1). The arrangement portion (112A1) is provided at the central portion of the first spacer member (112A). The corner portion (112A2) includes a first corner portion (112A21) to a fourth corner portion (112A24), and is provided at the four corners of the first spacer member (112A). A recess (400) is formed between adjacent corner portions (112A2). The first frame portion (112A3) and the second frame portion (112A4) are continuous via the corner portion (112A2). The first flow path member (111A) is attached to the first frame portion (112A3). A gap (Q1) exists between the second frame portion (112A4) and the first flow path member (111A).

[0063] (1-2-4) Second spacer member As shown in FIG. 5(b), the second spacer member (112B) includes a placement portion (112B1), corner portions (112B2), a pair of third frame portions (112B3), and a pair of fourth frame portions (112B4). The pair of third frame portions (112B3) extend parallel to each other along the third direction (V3) while being spaced apart from each other along the second direction (V2). The pair of fourth frame portions (112B4) extend parallel to each other along the second direction (V2) while being spaced apart from each other along the third direction (V3). The pair of third frame portions (112B3) and the pair of fourth frame portions (112B4) form a substantially rectangular frame, and the placement portion (112B1) is located inside the frame. The placement portion (112B1) is provided for placing the second flow path member (111B) and is a space that penetrates the second spacer member (112B) along the first direction (V1). The placement portion (112B1) is provided at the central portion of the second spacer member (112B). The corner portions (112B2) include first corner portions (112B21) to fourth corner portions (112B24) and are provided at the four corners of the placement portion (112B1). A recess (400) is formed between adjacent corner portions (112B2). The third frame portion (112B3) and the fourth frame portion (112B4) are continuous via the corner portions (112B2). The second flow path member (111B) is attached to the third frame portion (112B3). A gap (Q2) exists between the fourth frame portion (112B4) and the second flow path member (111B).

[0064] (1-2-5) Partition member As shown in FIG. 6, the partition member (120) includes an opposing portion (121) and corner portions (122). The opposing portion (121) opposes the flow path member (111). The opposing portion (121) is provided at the central portion of the partition member (120). The corner portions (122) include first corner portions (1221) to fourth corner portions (1224) and are provided at the four corners of the opposing portion (121). A recess (400) is formed between adjacent corner portions (122).

[0065] The n-th corner portion (202n) of the first plate member (200), the n-th corner portion (302n) of the second plate member (300), the n-th corner portion (112A2n) of the first spacer member (112A), the n-th corner portion (112B2n) of the second spacer member (112B), and the n-th corner portion (122n) of the partition member (120) are arranged to be laminated along the first direction (V1). n is a natural number of 1 or more and 4 or less.

[0066] In the first flow path member (111A) shown in FIG. 5(a), while gaps (Q1) are respectively formed between each of the pair of first frame portions (112A3), both end portions (111C) on both sides in the third direction (V3) of the first flow path member (111A) are respectively fitted into grooves (112a) formed in a pair of second frame portions (112A4) of the first spacer member (112A), whereby the first flow path member (111A) is attached to the first spacer member (112A). In the second flow path member (111B) shown in FIG. 5(b), while gaps (Q2) are respectively formed between each of the pair of fourth frame portions (112B4), both end portions (111C) on both sides in the second direction (V2) of the second flow path member (111B) are respectively fitted into grooves (112a) formed in a pair of third frame portions (112B3) of the second spacer member (112B), whereby the second flow path member (111B) is attached to the second spacer member (112B).

[0067] (1-3) Flow of refrigerant As shown in FIG. 7, the piping member (P) provided in the heat exchanger (1) includes a pair of first piping members (PA11, PA12) arranged along the second direction (V2) and a pair of second piping members (PB21, PB22) arranged along the third direction (V3).

[0068] As shown in FIGS. 7 and 8(a), the first refrigerant flows into the refrigerant pipe (P1) of the first piping member (PA11), passes through the refrigerant pipe (P1), and then is sent to the first flow path member (111A) through the gap (Q1). The first refrigerant sent to the first flow path member (111A) is sent through the first flow path (R1) of the first flow path member (111A), and then is discharged from the heat exchanger (1) through the refrigerant pipe (P1) of the first piping member (PA12).

[0069] As shown in FIGS. 7 and 8(b), the second refrigerant flows into the refrigerant pipe (P1) of the second pipe member (PA21), passes through the refrigerant pipe (P1), and then is sent to the second flow path member (111B) through the gap (Q2). The second refrigerant sent to the second flow path member (111B) is sent through the second flow path (R2) of the second flow path member (111B), and then is discharged from the heat exchanger (1) through the refrigerant pipe (P1) of the second pipe member (PA22).

[0070] As shown in FIGS. 5(a) and 5(b), the flow path member (111) is supported by the spacer member (112). A groove (112a) is formed in the spacer member (112), and when the flow path member (111) is fitted (attached) into the groove (112a), the flow path member (111) is positioned with respect to the spacer member (112). In the present embodiment, the partition member (120) includes a plurality of frame portions arranged around the flow path member (111), and grooves (112a) are respectively formed in a pair of frame portions (112A4, 112B3) facing each other through the flow path member (111) among the plurality of frame portions. The flow path member (111) is fitted into the groove (112a), and gaps (Q1, Q2) are respectively provided between the flow path member (111) and each of the other pair of frame portions (112A3, 112B4) facing each other through the flow path member (111). The groove (112a) has a shape in which the surface facing the flow path member (111) is recessed in each of the pair of frame portions (112A4, 112B3). As shown in FIGS. 8(a) and 8(b), the refrigerant is sent to the flow path member (111) through one of the pair of gaps (Q1, Q2), and the refrigerant is sent to the outside of the flow path member (111) through the other gap. Each of the plurality of partition members (120) is composed of one member that annularly connects the plurality of frame portions so as to surround the flow path member (111).

[0071] (1-4) Diffusion bonding The flow path member (111), spacer member (112), partition member (120), first plate member (200), and second plate member (300) are separate members from each other. FIG. 9(a) shows the layer member (110) and the partition member (120) before diffusion bonding. FIG. 9(b) shows the layer member (110) and the partition member (120) after diffusion bonding. As shown in FIGS. 9(a) and 9(b), the constituent members of the heat exchanger (1) (flow path member (111), spacer member (112), partition member (120), first plate member (200), and second plate member (300)) are joined by diffusion bonding, brazing, or the like. In the present embodiment, the flow path member (111), spacer member (112), and partition member (120) are joined by solid-phase diffusion bonding. Note that the flow path member (111), spacer member (112), and partition member (120) may be joined by liquid-phase diffusion bonding or brazing. Hereinafter, in the first embodiment, diffusion bonding refers to solid-phase diffusion bonding.

[0072] Diffusion bonding is to realize a metal bond between the joint surfaces of the constituent members of the heat exchanger (1) by pressing the constituent members of the heat exchanger (1) along the first direction (V1) while heating the constituent members of the heat exchanger (1), and to join the constituent members of the heat exchanger (1) to each other.

[0073] As shown in FIG. 9(a), by performing diffusion bonding, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce the dimensional difference in the first direction (V1) between the flow path member (111) and the spacer member (112) adjacent to each other in the direction perpendicular to the first direction (V1).

[0074] In this embodiment, by performing diffusion bonding, the flow path member (111) is deformed so that the dimensions of the flow path member (111) become smaller in the first direction (V1). Before diffusion bonding, in the first direction (V1), the dimension E1 of the flow path member (111) is larger than the dimension F1 of the spacer member (112) (E1 > F1). As shown in FIG. 9(b), after diffusion bonding, in the first direction (V1), the dimension E2 of the flow path member (111) becomes the same as (including the case of being substantially the same) the dimension F2 of the spacer member (112) (E2 ≈ F2 or E2 = F2). In this embodiment, in the first direction (V1), the dimension F1 of the spacer member (112) before diffusion bonding is substantially the same as (including the case of being the same) the dimension F2 of the spacer member (112) after diffusion bonding (F1 ≈ F2 or F1 = F2).

[0075] Among the flow path member (111) and the spacer member (112) adjacent in the direction perpendicular to the first direction (V1), the member with the larger dimension in the first direction (V1) has lower rigidity. In this embodiment, the flow path member (111) has lower rigidity than the spacer member (112). Thereby, at the time of diffusion bonding, the flow path member (111) can be easily deformed, and the dimensional difference in the first direction (V1) between the flow path member (111) and the spacer member (112) can be effectively reduced.

[0076] The surface pressure at the contact point between the flow path member (111) and the partition member (120) in the partition member (120) immediately after diffusion bonding (immediately after deformation) (solid-phase diffusion bonding) is 1 MPa or more, and preferably 5 MPa or more. When the flow path member (111), the spacer member (112), and the partition member (120) are liquid-phase diffusion bonded, the surface pressure at the contact point between the flow path member (111) and the partition member (120) in the partition member (120) immediately after liquid-phase diffusion bonding may be 1 MPa or less.

[0077] (1 - 5) Dimensions of the components of the heat exchanger FIG. 10(a) shows the laminate (100) and the partition member (120) before diffusion bonding. FIG. 10(b) shows a first example of the state of the laminate (100) and the partition member (120) after diffusion bonding. FIG. 10(c) shows a second example of the state of the laminate (100) and the partition member (120) after diffusion bonding.

[0078] Hereinafter, the direction perpendicular to the first direction (V1) may be described as the vertical direction (V4). When the flow path member (111) shown in FIGS. 10(a) to 10(c) is the first flow path member (111A), the vertical direction (V4) is the third direction (V3) (see FIG. 8(b)). When the flow path member (111) shown in FIGS. 10(a) to 10(c) is the second flow path member (111B), the vertical direction (V4) is the second direction (V2) (see FIG. 8(a)).

[0079] As shown in FIGS. 10(b) and 10(c), the flow path member (111) is joined to one partition member (120) at a plurality of joining portions (YA) by diffusion bonding, and the plurality of joining portions (YA) are arranged at intervals along the vertical direction (V4). After diffusion bonding, assuming that the dimension in the vertical direction (V4) of adjacent joining portions (YA) is P and the dimension in the first direction (V1) of the flow path member (111) is h. In this case, it is preferable that the relationship of (2 / 5)P < h < (2 / 3)P, or (2 / 5)h < P < (2 / 3)h holds.

[0080] In FIG. 10(a), the flow path member (111) is formed such that a certain shape (unit shape) is repeatedly arranged along the vertical direction (V4). As shown in FIG. 10(a), before diffusion bonding, in a cross-sectional view (in a cross-sectional view perpendicular to the direction in which the flow path (R) formed by the flow path member (111) extends), the length of half of the unit shape is L, and the dimension in the first direction (V1) of the flow path member (111) is H. As shown in FIGS. 10(b) and 10(c), after diffusion bonding, the dimension in the first direction (V1) of the flow path member (111) is h, the dimension in the vertical direction (V4) of one joining portion (YA) is a, the dimension in the vertical direction (V4) of adjacent joining portions (YA) is P, and 0 < a ≤ P / 2. In this case, it is preferable that the following relationship (Equation 1) holds.

[0081] (Equation 1) Δ(H - h)>L - (P / 2)-√{(L - 2a + P / 2)(L - P / 2)}

[0082] In the first direction (V1), it is preferable that the dimension H of the flow path member (111) before diffusion bonding is 2 mm or less.

[0083] (1-6) Shape of the flow path member In the present embodiment, in a cross-sectional view (when viewed from the direction in which the flow path formed by the flow path member (111) extends), the flow path member (111) includes a sinusoidal shape (see FIGS. 8(a) and 8(b)). However, the present invention is not limited to this. As shown in FIGS. 11(a) to 11(c), in a cross-sectional view (when viewed from the direction in which the flow path extends), it may include a triangular shape, a trapezoidal shape, or a round shape. As shown in FIG. 11(a), the triangular shape is a shape in which each of the peak portion (111a) and the valley portion (111b) of the flow path member (111) is bent at one location. As shown in FIG. 11(b), the trapezoidal shape is a shape in which each of the peak portion (111a) and the valley portion (111b) of the flow path member (111) is bent at two locations. As shown in FIG. 11(c), the round shape is a shape in which a plurality of cylindrical members (111c) are arranged along the vertical direction (V4). In this case, the adjacent cylindrical members (111c) may be connected to each other, or the adjacent cylindrical members (111c) may be separated from each other.

[0084] (1-7) Effect As described above, the flow path member (111), the spacer member (112), and the partition member (120) are joined. As a result, even if there is a dimensional difference (height difference) in the first direction (V1) between the flow path member (111) and the spacer member (112) adjacent to each other in a direction perpendicular to the first direction (V1) before joining, due to the pressure from the partition member (120) during joining (pressurization by pressing during joining), at least one of the flow path member (111) and the spacer member (112) adjacent to each other in a direction perpendicular to the first direction (V1) can be deformed to reduce the height difference. As a result, the constituent members of the heat exchanger (1) can be effectively joined. Further, by effectively joining the constituent members of the heat exchanger (1), an increase in the defective rate of the heat exchanger (1) can be suppressed.

[0085] In addition, by diffusion bonding, the height difference between adjacent flow path members (111) and spacer members (112) can be easily reduced, so a margin can be provided for the accuracy of the components of the heat exchanger (1), and the heat exchanger (1) can be easily manufactured.

[0086] Also, since the height difference between adjacent flow path members (111) and spacer members (112) can be reduced by diffusion bonding, it is not necessary to process the shapes of the flow path members (111) and spacer members (112) to match their heights. Therefore, the cost for such processing can be suppressed. As a result, an increase in the manufacturing cost of the heat exchanger (1) can be suppressed.

[0087] In addition, the components of the heat exchanger (1) can be made of high-strength stainless steel, effectively preventing refrigerant leakage from the heat exchanger (1). As an alternative method to diffusion bonding, there is brazing using copper as a brazing material, but copper is inferior in strength compared to stainless steel. In contrast, by configuring the components of the heat exchanger (1) with stainless steel and joining the components to each other by diffusion bonding, the strength of the joint portions of the components can be effectively ensured.

[0088] (1-8) Modification example of the heat exchanger Regarding the modification example of the heat exchanger (1), mainly the differences from the heat exchanger (1) shown in FIGS. 1 to 8 will be described.

[0089] The modification example of the heat exchanger (1) includes a laminate (100), a first plate member (200), and a second plate member (300). The laminate (100) includes a plurality of layer members (110) and a partition member (120). Each of the plurality of layer members (110) includes a flow path member (111) and a spacer member (112).

[0090] FIG. 12 is a partial cross-sectional view showing a modified example of the heat exchanger (1). As shown in FIG. 12, each of the plurality of flow path members (111) includes a first portion (1111) and a second portion (1112). The first portion (1111) is disposed on a side perpendicular to the first direction (V1) with respect to the spacer member (112). The second portion (1112) is sandwiched between the spacer member (112) and the partition member (120). The second portion (1112) may be located on one direction side (V11) of the first direction (V1) or the other direction side (V12) of the first direction (V1) with respect to the spacer member (112).

[0091] The flow path member (111), the spacer member (112), the partition member (120), the first plate member (200), and the second plate member (300) are separate members from each other. In the modified example of the heat exchanger (1), the component members are joined to each other by diffusion bonding.

[0092] By performing diffusion bonding, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce the dimensional difference in the first direction (V1) between the first member (the first portion (1111) of the flow path member (111)) adjacent in the direction perpendicular to the first direction (V1) and the second member (the spacer member (112) and the second portion (1112) of the flow path member (111)).

[0093] In the modified example, by performing diffusion bonding, the flow path member (111) is deformed so that the dimension of the flow path member (111) becomes smaller in the first direction (V1). In the modified example, the surface pressure at the contact point between the flow path member (111) and the partition member (120) immediately after diffusion bonding (immediately after deformation) (solid-phase diffusion bonding) is 1 MPa or more, and preferably 5 MPa or more. When the flow path member (111), the spacer member (112), and the partition member (120) are joined by liquid-phase diffusion bonding, the surface pressure at the contact point between the flow path member (111) and the partition member (120) immediately after liquid-phase diffusion bonding may be 1 MPa or less.

[0094] Regarding a modified example of the heat exchanger (1), it is preferable that the relationship of (2 / 5)P < h < (2 / 3)P or (2 / 5)h < P < (2 / 3)h holds (see FIGS. 10(b) and 10(c)).

[0095] Regarding a modified example of the heat exchanger (1), it is preferable that the relationship of the above-mentioned number 1 holds (see FIGS. 10(a) to 10(c)).

[0096] Regarding a modified example of the heat exchanger (1), in the first direction (V1), it is preferable that the dimension H of the flow path member (111) before diffusion bonding is 2 mm or less.

[0097] (1 - 9) Modified example of the layer member As shown in FIG. 13(a), a layer member (A), which is at least one layer member (110) among the plurality of layer members (110), may be formed by performing processing such as etching or cutting on one surface (A1) of a flat plate to form a plurality of recesses (A2) in parallel on the one surface (A1). In this case, in the layer member (A), a portion (A3) where the plurality of recesses (A2) are located corresponds to the flow path member (111), and portions (A4) located on both sides of the plurality of recesses (A2) correspond to the spacer member (112). As shown in FIGS. 13(a) and 13(b), the layer member (A) is joined to the partition member (120) by diffusion bonding. A space surrounded by the recess (A2) and the partition member (120) serves as a refrigerant flow path.

[0098] (2) Second embodiment Regarding the heat exchanger (1) according to the second embodiment, mainly, the points different from the heat exchanger (1) according to the first embodiment will be described.

[0099] (2 - 1) Overall configuration As shown in Fig. 14, the heat exchanger (1) according to the second embodiment includes a laminate (100). The laminate (100) includes a plurality of layer members (110) and a partition member (120). The plurality of layer members (110) are laminated along the first direction (V1). The partition member (120) is disposed between adjacent layer members (110). Each of the plurality of layer members (110) includes a flow path member (111) and a spacer member (112). The spacer member (112) is a member separate from the flow path member (111). The spacer member (112) is disposed on the side in the direction perpendicular to the first direction (V1) with respect to the flow path member (111). In the present embodiment, the spacer member (112) is disposed on both sides in the direction (second direction (V2)) perpendicular to the first direction (V1) with respect to the flow path member (111).

[0100] As shown in Fig. 14, the flow path member (111) includes a plurality of protruding portions (111d) and a floor portion (111e). The floor portion (111e) is joined to the partition member (120) adjacent to the other direction side (V12) in the first direction (V1). The protruding portion (111d) has a bar shape extending along the first direction (V1). In the present embodiment, the thickness of the protruding portion (111d) (the shape of the cross section perpendicular to the first direction (V1)) is constant. The plurality of protruding portions (111d) protrude from the floor portion (111e) to one direction side (V11) in the first direction (V1). The plurality of protruding portions (111d) are arranged at intervals along the second direction (V2). Each of the plurality of protruding portions (111d) extends along the third direction (V3). In the second direction (V2), the dimension of each of the plurality of protruding portions (111d) is smaller than the dimension of the floor portion (111e).

[0101] In the present embodiment, the plurality of protruding portions (111d) include a first protruding portion (111d1), a second protruding portion (111d2), a third protruding portion (111d3), etc. (see Fig. 15(b)). The first protruding portion (111d1) has an area (m1) of the cross section perpendicular to the first direction (V1), the second protruding portion (111d2) has an area (m2) of the cross section perpendicular to the first direction (V1), and the third protruding portion (111d3) has an area (m3) of the cross section perpendicular to the first direction (V1).

[0102] The plurality of protrusions (111d) are joined to a partition member (120) adjacent to one side (V11) in the first direction (V1). A refrigerant flow path (R) is formed between the protrusions (111d) adjacent in the second direction (V2), the floor portion (111e), and the partition member (120) adjacent to one side (V11) in the first direction (V1). The flow path (R) extends along the third direction (V3). In the present embodiment, the flow path member (111) forms a plurality of flow paths (R) in parallel by arranging three or more protrusions (111d) at intervals.

[0103] FIG. 15(a) is a cross-sectional view showing the flow path member (111), the spacer member (112), and the partition member (120) before joining the partition member (120) to the flow path member (111) and the spacer member (112). FIG. 15(b) is a cross-sectional view showing the flow path member (111), the spacer member (112), and the partition member (120) after joining the partition member (120) to the flow path member (111) and the spacer member (112). As shown in FIG. 15(a), before joining (in a state where no external force acts on the flow path member (111) and the spacer member (112)), in the first direction (V1), the dimension of the portion of the flow path member (111) where the protrusions (111d) are arranged is larger than or equal to the dimension of the spacer member (112). As shown in FIGS. 15(a) and 15(b), the flow path member (111), the spacer member (112), and the partition member (120) are joined by diffusion bonding or brazing. The diffusion bonding may be either solid-phase diffusion bonding or liquid-phase diffusion bonding. As a result, the heat exchanger (1) is manufactured.

[0104] (2-2) Young's modulus The apparent Young's modulus G of the flow path member (111) f is smaller than the Young's modulus G of the spacer member (112) s (G f < G s ). Hereinafter, the Young's modulus G of the spacer member (112) s will be described.

[0105] The Young's modulus G of the spacer member (112) sis the ratio of the sinking deformation rate (U / T) of the spacer member (112) to the load (S / 2M) per unit area of the spacer member (112) in the first direction (V1). Young's modulus G of the spacer member (112) s is represented by Equation 2 below.

[0106] (Equation 2) G s = ST / 2MU

[0107] As shown in FIG. 15(b), the pressing force S in Equation 2 is the force for pressing the spacer member (112) along the first direction (V1) (the load applied to the cross-sectional area (M) of the spacer member (112)). The cross-sectional area (M) is the area of the cross-section (MA) perpendicular to the first direction (V1) in the spacer member (112). The dimension T in Equation 2 is the maximum dimension (initial height of the spacer member (112)) of the spacer member (112) in the first direction (V1) when no external force is acting on the spacer member (112) (the state before the partition member (120) is joined to the spacer member (112)). The U in Equation 2 is the deformation amount (sinking deformation amount, shrinkage amount) of the spacer member (112) in the first direction (V1) when the pressing force S acts on the spacer member (112).

[0108] (2-3) Apparent Young's modulus The apparent Young's modulus G of the flow path member (111) f is the ratio of the sinking deformation rate (u / t) of the flow path member (111) to the load (S / Σm i ) per unit area of the plurality of protruding portions (111d) in the first direction (V1). The apparent Young's modulus G of the flow path member (111) f is represented by Equation 3 below.

[0109] (Equation 3) G f = St / Σm i · u

[0110] As shown in FIG. 15(b), the pressing force S in Equation 3 is the force for pressing the flow path member (111) along the first direction (V1).

[0111] The dimension t of No. 3 is the maximum dimension (initial height of the flow path member (111)) of the flow path member (111) in the first direction (V1) in a state where no external force is acting on the flow path member (111) (a state before the partition member (120) is joined to the flow path member (111)).

[0112] The u of No. 3 is the amount of deformation (sinking deformation amount, shrinkage amount) of the flow path member (111) in the first direction (V1) when a pressing force S acts on the flow path member (111).

[0113] Σm of No. 3 i is the sum of the average values of the areas of the cross-sections perpendicular to the first direction (V1) at each of the plurality of protruding portions (111d) (Σm i = average value of the area (m1) of the cross-section perpendicular to the first direction (V1) at the first protruding portion (111d1) + average value of the area (m2) of the cross-section perpendicular to the first direction (V1) at the second protruding portion (111d2) + average value of the area (m3) of the cross-section perpendicular to the first direction (V1) at the third protruding portion (111d3) + ···).

[0114] As shown in Fig. 15(b) (in a cross-sectional view perpendicular to the extending direction of the flow path (R) formed by the flow path member (111)), with respect to the cross-section (MA’) having the cross-sectional area (M’) of the flow path member (111), virtual lines (D) extending along the first direction (V1) from each of two or more protruding portions (111d) intersect. The cross-sectional area (M’) of the flow path member (111) corresponds to the cross-sectional area (M) of the spacer member (112), and the cross-section (MA’) of the flow path member (111) corresponds to the cross-section (MA) of the spacer member (112). The cross-section (MA’) of the flow path member (111) is the cross-section of the floor portion (111e) having the same dimensions as the cross-section (MA) of the spacer member (112) among the cross-sections perpendicular to the first direction (V1) in the flow path member (111). In the present embodiment, in the cross-sectional view, with respect to the cross-section (MA’) of the flow path member (111), the virtual lines (D, D1) extending along the first direction (V1) from the first protruding portion (111d1) and the virtual lines (D, D2) extending along the first direction (V1) from the second protruding portion (111d2) intersect. Hereinafter, in the cross-sectional view, a protruding portion (111d) having a virtual line (D) intersecting the cross-section (MA’) of the flow path member (111) may be described as an intersecting protruding portion (W). Two or more intersecting protruding portions (W) are included in the plurality of protruding portions (111d) of the flow path member (111).

[0115] (2-4) Effect As described above, the apparent Young's modulus G of the flow path member (111) f is smaller than the Young's modulus G of the spacer member (112) s (G f < G s)。As a result, as shown in FIGS. 15(a) and 15(b), the flow path member (111) and the spacer member (112) can be joined to the partition member (120) so as to reduce the dimensional difference in the first direction (V1) between the flow path member (111) and the spacer member (112). That is, before joining, in the first direction (V1), the maximum dimension of the flow path member (111) is larger than the maximum dimension of the spacer member (112), but by performing the joining, the flow path member (111) is deformed so that the dimension of the flow path member (111) becomes smaller in the first direction (V1). According to this, by performing the joining, the flow path member (111) is deformed so that the dimensional difference in the first direction (V1) between the flow path member (111) and the spacer member (112) adjacent to each other in the direction perpendicular to the first direction (V1) becomes smaller. The flow path member (111) is deformed by the pressure from the partition member (120) during joining (pressurization by pressing during joining). As a result, after joining, in the first direction (V1), the dimension of the flow path member (111) becomes the same as (including the case of being substantially the same as) the dimension of the spacer member (112). As a result, it is possible to suppress the occurrence of a joining failure between the flow path member (111) and the spacer member (112) with respect to the partition member (120).

[0116] In addition, by reducing the rigidity of the flow path member (111), the non-uniform contact state between the partition member (120) and the plurality of protruding portions (111d) of the flow path member (111) can be improved, so that the joining failure between the partition member (120) and the plurality of protruding portions (111d) of the flow path member (111) can be reduced, and as a result, the durability and reliability of the heat exchanger (1) can be improved.

[0117] In addition, in the present embodiment, the plurality of protruding portions (111d) are made thinner so that a refrigerant flow path (R) is formed between adjacent protruding portions (111d). As a result, the area of the cross section perpendicular to the first direction (V1) of the plurality of protruding portions (111d) can be reduced, so that the apparent Young's modulus G f <of the spacer member (112) s of the flow path member (111) can be made to be f smaller.

[0118] (2-5) First Modified Example The flow path member (111) may be formed of a foamed material. The foamed material is, for example, a foamed metal (foamed metal made of aluminum). By forming the flow path member (111) of the foamed material, the apparent Young's modulus G of the flow path member (111) f <Young's modulus G of the spacer member (112) s becomes such that the apparent Young's modulus G of the flow path member (111) f can be made smaller.

[0119] (2-6) Second Modified Example As shown in FIG. 16(a), the flow path member (111) may have a hole (111da) formed therein. The hole (111da) may be a bottomed hole or a hole penetrating the flow path member (111). In the present embodiment, the hole (111da) is formed in the protruding portion (111d) (at least one of the plurality of protruding portions (111d)). By forming the hole (111da) in the flow path member (111), the apparent Young's modulus G of the flow path member (111) f <Young's modulus G of the spacer member (112) s becomes such that the apparent Young's modulus G of the flow path member (111) f can be made smaller.

[0120] (2-7) Third Modified Example As shown in FIG. 16(b), in the protruding portion (111d) (at least one of the plurality of protruding portions (111d)), a part may be thinner than another part. In the present embodiment, the base end portion (111db) of the protruding portion (111d) is thinner than the tip end portion (111dc) of the protruding portion (111d). By making a part of the flow path member (111) thinner, the apparent Young's modulus G of the flow path member (111) f can be made smaller.

[0121] (2-8) Fourth Modified Example As shown in FIG. 16(c), in the protruding portion (111d) (at least one of the plurality of protruding portions (111d)), the area of the cross-section perpendicular to the first direction (V1) may change. In the present embodiment, the cross-section of the protruding portion (111d) perpendicular to the first direction (V1) becomes smaller as it goes toward one side (V11) in the first direction (V1). That is, the protruding portion (111d) becomes thinner as it goes toward one side (V11) in the first direction (V1). Thereby, by changing the thickness of the protruding portion (111d) in the first direction (V1), the apparent Young's modulus G of the flow path member (111) f can be reduced.

[0122] (2-9) Fifth modification example The material of the flow path member (111) may be different from the material of the spacer member (112). For example, the material of the flow path member (111) is composed of an aluminum alloy containing pure aluminum, and the material of the spacer member (112) is composed of a steel-based material containing pure iron and a SUS material. In addition, the material of the flow path member (111) may be composed of a magnesium alloy containing pure magnesium, and the material of the spacer member (112) may be composed of a steel-based material containing pure iron and a SUS material. Also, the material of the flow path member (111) may be composed of a titanium alloy containing pure titanium, and the material of the spacer member (112) may be composed of a steel-based material containing pure iron and a SUS material. Further, the material of the flow path member (111) may be composed of a copper alloy containing pure copper, and the material of the spacer member (112) may be composed of a steel-based material containing pure iron and a SUS material. Moreover, the material of the flow path member (111) may be composed of an aluminum alloy containing pure aluminum, and the material of the spacer member (112) may be composed of a copper alloy containing pure copper. Additionally, the material of the flow path member (111) may be composed of an aluminum alloy containing pure aluminum (about 72 GPa), and the material of the spacer member (112) may be composed of a titanium alloy containing pure titanium (about 106 GPa). Also, the material of the flow path member (111) may be composed of a magnesium alloy containing pure magnesium (about 40 GPa), and the material of the spacer member (112) may be composed of a titanium alloy containing pure titanium (about 106 GPa). Further, the material of the flow path member (111) may be composed of a magnesium alloy containing pure magnesium (about 40 GPa), and the material of the spacer member (112) may be composed of a copper alloy containing pure copper (about 117 GPa). Thereby, the apparent Young's modulus G of the flow path member (111) f becomes small, that is, the apparent Young's modulus G of the flow path member (111) f < the Young's modulus G of the spacer member (112) s so that the material of the flow path member (111) and the material of the spacer member (112) can be made different from each other. Regarding the combination of the material of the flow path member (111) and the material of the spacer member (112), the above combination is an example, and as long as the apparent Young's modulus G of the flow path member (111) f < the Young's modulus G of the spacer member (112) s any combination that satisfies this condition is acceptable, and it is not limited to the above combination.

[0123] In addition, when the protruding portion (111d) is configured as in the above first to fifth modified examples (when the area of the cross section perpendicular to the first direction (V1) in the protruding portion (111d) does not remain constant, etc.), the apparent Young's modulus G of the flow path member (111) f is smaller than the Young's modulus G of the spacer member (112) s (G f < G s ).

[0124] Although the embodiments and modified examples have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Also, the above embodiments, modified examples, and other embodiments may be appropriately combined or replaced as long as the functions of the objects of the present disclosure are not impaired.

[0125] The above descriptions such as "first", "second", "third",... are used to distinguish the phrases to which these descriptions are given, and do not limit the number or order of those phrases either.

Industrial Applicability

[0126] As described above, the present disclosure is useful for heat exchangers and methods for manufacturing heat exchangers.

Explanation of Signs

[0127] 1 Heat exchanger 110 Layer member 111 Flow path member 112 Spacer member 120 Partition member V1 First direction (lamination direction)

Claims

1. A plurality of layered members (110) to be laminated, a partition member (120) disposed between adjacent ones of the layered members (110), and a heat exchanger manufacturing method comprising: each of the plurality of layered members (110) includes a flow path member (111) forming a flow path for a refrigerant, and a spacer member (112) disposed on a side in a direction perpendicular to the lamination direction (V1) of the layered member (110) with respect to the flow path member (111), wherein the method includes a joining step of joining the flow path member (111), the spacer member (112), and the partition member (120), and by performing the joining, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce a dimensional difference in the lamination direction (V1) between the flow path member (111) and the spacer member (112) adjacent to each other in the perpendicular direction.

2. The heat exchanger manufacturing method according to claim 1, wherein in the joining step, the flow path member (111), the spacer member (112), and the partition member (120) are diffusion-joined.

3. Before the diffusion joining, in the lamination direction (V1), the dimension of the flow path member (111) is larger than the dimension of the spacer member (112), and the heat exchanger manufacturing method according to claim 2, wherein by performing the diffusion joining, the flow path member (111) is deformed so that the dimension of the flow path member (111) becomes smaller in the lamination direction (V1).

4. The heat exchanger manufacturing method according to claim 2 or claim 3, wherein a surface pressure at a contact point between the flow path member (111) and the partition member (120) in the partition member (120) immediately after the diffusion joining is 1 MPa or more.

5. The heat exchanger manufacturing method according to claim 2 or claim 3, wherein the flow path member (111) includes a triangular shape, a trapezoidal shape, a circular shape, or a sinusoidal curve shape in a cross-sectional view and is deformed by being pressurized during the diffusion joining.

6. The flow path member (111) is joined to one of the partition members (120) at a plurality of joining locations (YA) by the diffusion joining, and the plurality of joining locations (YA) are arranged at intervals along the perpendicular direction. ​ After the diffusion bonding, when the dimension in the vertical direction of the adjacent joint portions (YA) is P and the dimension in the stacking direction (V1) of the flow path member (111) is h, the relationship of (2 / 5)P < h < (2 / 3)P or (2 / 5)h < P < (2 / 3)h holds. The method for manufacturing a heat exchanger according to claim 2 or claim 3.

7. The flow path member (111) is formed such that a certain unit shape is repeatedly arranged along the vertical direction. By the diffusion bonding, the flow path member (111) is joined to one of the partition members (120) at a plurality of joint portions (YA), and the plurality of joint portions (YA) are arranged at intervals along the vertical direction. Before the diffusion bonding, in a cross-sectional view of the flow path (R) formed by the flow path member (111), the length of half of the unit shape is L, and the dimension in the stacking direction (V1) of the flow path member (111) is H. After the diffusion bonding, the dimension in the stacking direction (V1) of the flow path member (111) is h, the dimension in the vertical direction of one of the joint portions (YA) is a, the dimension in the vertical direction of the adjacent joint portion (YA) is P, and when 0 < a ≤ P / 2, Regarding the difference Δ(H - h) between the dimension H in the stacking direction (V1) of the flow path member (111) before the diffusion bonding and the dimension h in the stacking direction (V1) of the flow path member (111) after the diffusion bonding, the relationship of the following formula (1) holds. The method for manufacturing a heat exchanger according to claim 2 or claim 3. (Formula 1) Δ(H - h) > L - (P / 2) - √{(L - 2a + P / 2)(L - P / 2)}

8. A plurality of stacked layer members (110), A partition member (120) disposed between adjacent layer members (110), Comprising: Each of the plurality of layer members (110), A flow path member (111) forming a flow path for a refrigerant, A spacer member (112), Including, Each of the plurality of flow path members (111), A first portion (1111) disposed on the side in the direction perpendicular to the stacking direction (V1) of the layer member (110) with respect to the spacer member (112), A second portion (1112) sandwiched between the spacer member (112) and the partition member (120), A method for manufacturing a heat exchanger, Including a step of joining the flow path member (111), the spacer member (112), and the partition member (120). By performing the joining, at least one of the flow path member (111) and the spacer member (112) is deformed so as to reduce the dimensional difference in the lamination direction (V1) between the first member and the second member adjacent in the vertical direction. The first member indicates a first portion (1111) of the flow path member (111). The second member indicates the spacer member (112) and a second portion (1112) of the flow path member (111), and a method for manufacturing a heat exchanger.

9. The method for manufacturing a heat exchanger according to any one of claims 1, 2, 3, and 8, wherein the refrigerant contains propane.

10. The method for manufacturing a heat exchanger according to any one of claims 2, 3, and 8, wherein in the lamination direction (V1), the dimension of the flow path member (111) before the diffusion bonding is 2 mm or less.

11. The method for manufacturing a heat exchanger according to claim 1, wherein the apparent Young's modulus of the flow path member (111) is smaller than the Young's modulus of the spacer member (112).

12. The method for manufacturing a heat exchanger according to any one of claims 1 to 3 and 11, wherein the flow path member (111) is formed of a foamed material.

13. The flow path member (111) includes a floor portion (111e) and a protruding portion (111d) protruding from the floor portion (111e). The method for manufacturing a heat exchanger according to any one of claims 1 to 3 and 11, wherein in the vertical direction, the dimension of the protruding portion (111d) is smaller than the dimension of the floor portion (111e).

14. The method for manufacturing a heat exchanger according to any one of claims 1 to 3 and 11, wherein a hole (111da) is formed in the flow path member (111).

15. The method for manufacturing a heat exchanger according to claim 13, wherein in the protruding portion (111d), a part is thinner than another part.

16. The method for manufacturing a heat exchanger according to claim 13, wherein in the protruding portion (111d), the area of a cross section perpendicular to the lamination direction (V1) changes.

17. The method for manufacturing a heat exchanger according to any one of claims 1 to 3 and 11, wherein the material of the flow path member (111) is different from the material of the spacer member (112).

18. A plurality of the protruding portions (111d) protrude from the floor portion (111e) toward one side (V11) in the lamination direction (V1). The floor part (111e) is joined to the partition member (120) adjacent to the other direction side (V12) in the stacking direction (V1). The plurality of protruding parts (111d) are arranged at intervals along the vertical direction and are joined to the partition member (120) adjacent to one direction side (V11) in the stacking direction (V1). A refrigerant flow path (R) is formed between the adjacent protruding parts (111d), the floor part (111e), and the partition member (120) adjacent to one direction side (V11) in the stacking direction (V1). The method for manufacturing a heat exchanger according to claim 13.

19. A heat exchanger manufactured by the method for manufacturing a heat exchanger according to any one of claims 1 to 3, claim 8, and claim 11.

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