Heat exchanger and method for manufacturing the same

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 a heat exchanger. [Background technology]

[0002] Patent Document 1 discloses a heat exchanger. The heat exchanger of Patent Document 1 has a structure in which fluid passages are formed in multiple stages by stacking tube plates (partition members) with a pair of spacer bars (spacer members) in between. Corrugated fins (flow path members) are arranged in each fluid passage along the flow direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 4-63989 Summary of the Invention [Problem to be solved by the invention]

[0004] One method for manufacturing a heat exchanger is, for example, to join the components of the heat exchanger by brazing. However, due to variations in the thickness of the roll material from which the heat exchanger is made and in press molding, there is a possibility that there will be a difference in height between the components of each layer of the heat exchanger of about several tens of μm. This difference in height means that the brazing material will not fill the gaps between the joining surfaces of the components of the heat exchanger, which can lead to poor joining.

[0005] An object of the present disclosure is to provide a method for manufacturing a heat exchanger that can effectively join components of the heat exchanger. [Means for solving the problem]

[0006] A first aspect is a method for manufacturing a heat exchanger comprising a plurality of layer members (110) stacked together and partition members (120) disposed between adjacent layer members (110), each of the plurality of layer members (110) including a flow path member (111) forming a flow path for a refrigerant, and a spacer member (112) disposed on a side of the flow path member (111) in a direction perpendicular to a stacking direction (V1) of the layer members (110). 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), 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 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 components of the heat exchanger can be effectively joined.

[0008] In a second aspect, in the first aspect, in the bonding step, the flow path member (111), the spacer member (112), and the partition member (120) are diffusion bonded together.

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

[0010] In a third aspect, in the first or second aspect, before the diffusion bonding, the dimension of the flow path member (111) is larger than the dimension of the spacer member (112) in the stacking direction (V1), and by performing the diffusion bonding, 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 embodiment, the flow path member (111) can be deformed to absorb the dimensional difference between the flow path member (111) and the spacer member (112).

[0012] In the 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 the 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 diffusely bond the flow path member (111), the spacer member (112), and the partition member (120).

[0016] In the sixth aspect, in any one of the second to fifth aspects, the flow path member (111) is joined to one of the partition members (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 (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 (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 joining, and the plurality of joining locations (YA) are arranged at intervals along the vertical direction. Before the diffusion joining, 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, the dimension of the flow path member (111) in the stacking direction (V1) is H, after the diffusion joining, the dimension of the flow path member (111) in the stacking direction (V1) is h, the dimension of one of the joining locations (YA) in the vertical direction is a, and the dimension of the adjacent joining location (YA) in the vertical direction is P. When 0 < a ≤ P / 2, regarding the difference Δ(H - h) between the dimension H of the flow path member (111) in the stacking direction (V1) before the diffusion joining and the dimension h of the flow path member (111) in the stacking direction (V1) after the diffusion joining, the following relation of Equation (1) holds. (Equation 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 relation of Δ(H - h) > L - (P / 2) - √{(L - 2a + P / 2)(L - P / 2)} holds.

[0020] An eighth aspect is a method for manufacturing a heat exchanger comprising a plurality of stacked layer members (110) and partition members (120) arranged between adjacent layer members (110), each of the plurality of layer members (110) including a flow path member (111) forming a refrigerant flow path and a spacer member (112), each of the plurality of flow path members (111) including a first portion (1111) arranged on the side of the spacer member (112) in a direction perpendicular to the stacking direction (V1) of the layer members (110), and a second portion (1112) sandwiched between the spacer member (112) and the partition member (120). The manufacturing method for a heat exchanger includes a 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 the dimensional difference in the stacking direction (V1) between a first member and a second member adjacent in the vertical direction, the first member representing a first portion (1111) of the flow path member (111), and the second member representing the spacer member (112) and the second portion (1112) of the flow path member (111).

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

[0022] A ninth aspect is any one of the first to eighth aspects, wherein the refrigerant contains propane.

[0023] In a ninth embodiment, a refrigerant comprising propane can be passed through the flow passages of the heat exchanger.

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

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

[0026] An eleventh aspect is any one of the first to third aspects, wherein 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 eleventh 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 between the flow path member (111) and the spacer member (112) in the stacking direction (V1).

[0028] In a twelfth aspect, in any one of the first to third aspects and the eleventh aspect, the flow path member (111) is made of a foamed material.

[0029] In the twelfth aspect, the flow path member (111) is made of a foamed material, so that the apparent Young's modulus of the flow path member (111) can be made small.

[0030] A thirteenth aspect is any one of the first to third, eleventh and twelfth aspects, wherein the flow path member (111) includes a floor portion (111e) and a protrusion (111d) protruding from the floor portion (111e), and the dimension of the protrusion (111d) in the vertical direction is smaller than the dimension of the floor portion (111e).

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

[0032] A fourteenth aspect is any one of the first to third and eleventh to thirteenth aspects, wherein a hole (111da) is formed in the flow path member (111).

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

[0034] A fifteenth aspect is the thirteenth aspect, wherein one portion of the protrusion (111d) is thinner than the other portion.

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

[0036] A sixteenth aspect is the thirteenth aspect, wherein the area of ​​a cross section perpendicular to the stacking direction (V1) of the protruding portion (111d) changes.

[0037] In the sixteenth aspect, the apparent Young's modulus of the flow path member (111) can be reduced by changing the cross-sectional area of ​​the protrusion (111d).

[0038] A seventeenth aspect is any one of the first to third and eleventh to sixteenth aspects, in which the material of the flow path member (111) is different from the material of the spacer member (112).

[0039] In the seventeenth 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 small.

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

[0041] In the eighteenth aspect, the apparent Young's modulus of the flow path member (111) can be reduced by thinning the multiple protrusions (111d) so that a refrigerant flow path (R) is formed between adjacent protrusions (111d).

[0042] A heat exchanger according to a nineteenth aspect is produced by the method for producing a heat exchanger according to any one of the first to eighteenth aspects.

[0043] In the nineteenth aspect, components of a heat exchanger can be effectively joined. [Brief description of the drawings]

[0044] [Figure 1] FIG. 1 is a perspective view showing a part of a heat exchanger according to a first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the heat exchanger shown in FIG. [Diagram 3] FIG. 3 is a perspective view showing a state in which a piping member is fixed to the outer surface of the heat exchanger. [Figure 4] Figure 4(a) is a plan view of the first plate member, and Figure 4(b) is a plan view of the second plate member. [Diagram 5] Figure 5(a) is a plan view of a first spacer member, and Figure 5(b) is a plan view of a second spacer member. [Figure 6] FIG. 6 is a plan view of the partition member. [Figure 7] FIG. 7 is a plan view showing a state in which piping members are fixed to the outer surface of the heat exchanger. [Figure 8] 8(a) and 8(b) are cross-sectional views showing the coolant flowing through the flow path member. [Figure 9] Fig. 9(a) is a cross-sectional view showing the components of the heat exchanger before and after diffusion bonding, respectively. [Figure 10]Fig. 10(a) is a cross-sectional view showing the components of a heat exchanger before diffusion bonding, Fig. 10(b) is a cross-sectional view showing a first example of the components of a heat exchanger after diffusion bonding, and Fig. 10(c) is a cross-sectional view showing a second example of the components of a heat exchanger after diffusion bonding. [Figure 11] 11(a) to 11(c) are diagrams showing modified examples of the flow path member. [Figure 12] FIG. 12 is a partial cross-sectional view showing a modified example of the heat exchanger. [Figure 13] Fig. 13(a) is a perspective view showing a modified layer member and a partition member before diffusion bonding, and Fig. 13(b) is a perspective view showing a modified layer member and a partition member after diffusion bonding. [Figure 14] FIG. 14 is a cross-sectional view of a heat exchanger according to the second embodiment. [Figure 15] Fig. 15(a) is a cross-sectional view showing a flow path member, a spacer member, and a partition member before the partition member is joined to the flow path member and the spacer member, and Fig. 15(b) is a cross-sectional view showing a flow path member, a spacer member, and a partition member after the partition member is joined to the flow path member and the spacer member. [Figure 16] Fig. 16(a) is a cross-sectional view showing a second modified example of a flow path member, Fig. 16(b) is a cross-sectional view showing a third modified example of a flow path member, and Fig. 16(c) is a cross-sectional view showing a fourth modified example of a flow path member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] Hereinafter, the 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 within the scope of the technical idea of ​​the present disclosure. Since each drawing is intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding. In each embodiment, modified example, and drawing, the same or equivalent parts are given the same reference symbols, and detailed descriptions and descriptions of the accompanying effects will not be repeated.

[0046] (1) First embodiment The heat exchanger (1) according to the first embodiment is a device for exchanging heat among a plurality of fluids. The heat exchanger (1) is made of a metal material such as stainless steel or aluminum.

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

[0048] (1-1) Overall structure The laminate (100) includes a plurality of layer members (110) and a partition member (120). The plurality of layer members (110) are stacked along a first direction (V1). The first direction (V1) indicates the stacking 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 peaks (111a) that protrude toward one side (V11) of the first direction (V1) and valleys (111b) that protrude toward the other side (V12) of the first direction (V1). The flow path member (111) has a corrugated shape in which the peaks (111a) and the valleys (111b) are arranged alternately (see FIGS. 8(a) and 8(b)).

[0050] The spacer member (112) ensures an installation space for the flow path member (111). The spacer member (112) is disposed on the side of the flow path member (111) in a direction perpendicular to a first direction (V1) (stacking direction of the layer members (110)). In this 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 members (110A) and the second layer members (110B) are alternately arranged along the first direction (V1). 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 arranged in order and repeatedly along the first direction (V1).

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

[0053] The peaks (111a) and valleys (111b) of the first flow path member (111A) extend along the third direction (V3). The first flow path member (111A) delivers the refrigerant along the third direction (V3). The peaks (111a) and valleys (111b) of the second flow path member (111B) extend along the second direction (V2). The second flow path member (111B) delivers the refrigerant along the second direction (V2). In this embodiment, the first flow path member (111A) and the second flow path member (111B) deliver the refrigerant in directions perpendicular to each other. The direction in which the refrigerant is delivered by the first flow path member (111A) of the first layer member (110A) and the direction in which the refrigerant is delivered 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 a refrigerant, and the other flow path member sends water as a refrigerant. Note that one of the first flow path member (111A) and the second flow path member (111B) may send propane as a refrigerant, and the other flow path member may send CO2 as a refrigerant. Also, one of the first flow path member (111A) and the second flow path member (111B) may send water as a refrigerant, and the other flow path member may send CO2 as a 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 a 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 a 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-shaped member. The first plate member (200) faces the stacked body (100) from one side (V11) in the first direction (V1). The first plate member (200) is located at the furthest one side (V11) in the first direction (V1) (uppermost stage).

[0058] The second plate member (300) is a flat plate-shaped member. The second plate member (300) faces the stacked body (100) from the other side (V12) in the first direction (V1). The second plate member (300) is located at the furthest side (V12) in the first direction (V1) (lowest tier).

[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 piping (P1) and a plate-shaped portion (P2). The refrigerant piping (P1) is a tubular member for sending a refrigerant. The plate-shaped portion (P2) is a plate-shaped member, and is fixed to the outer surface of the heat exchanger (1). The refrigerant piping (P1) is provided on the plate-shaped portion (P2). The plate-shaped portion (P2) has a hole through which the refrigerant passes, the hole communicates with the inside of the refrigerant piping (P1) and faces the heat exchanger (1). The refrigerant is sent to the heat exchanger (1) through the refrigerant piping (P1). In this embodiment, a recess (400) is provided on the outer surface of the heat exchanger (1) at a location where the layer member (110) and the partition member (120) are located, and a piping member (P) is fixed to the edge of the recess (400), so that the refrigerant piping (P1) communicates with the space between the outer surface of the heat exchanger (1) and the recess (400) (see Figs. 5(a) to 6). A total of four piping members (P) are provided on both sides in the second direction (V2) and both sides in the third direction (V3) in the heat exchanger (1). Note that in Figs. 1 to 3(b), only one piping member (P) is provided, and the remaining three recesses (400) and refrigerant piping (P1) are omitted from illustration. Note that the heat exchanger (1) may not be provided with the recess (400) or the piping member (P).

[0060] (1-2) Components of heat exchangers (1-2-1) First plate member As shown in Fig. 4(a), the first plate member (200) includes a facing portion (201) and corner portions (202). The facing portion (201) faces the flow path member (111). The facing portion (201) is provided in the center of the first plate member (200). The corner portions (202) include a first corner portion (2021) to a fourth corner portion (2024), and are 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 corner portions (302). The facing portion (301) faces the flow path member (111). The facing portion (301) is provided in the center of the second plate member (300). The corner portions (302) include a first corner portion (3021) to a fourth corner portion (3024), and are 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 spaced apart 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 spaced apart 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 placement portion (112A1) is a void provided for placing the first flow path member (111A) and penetrating the first spacer member (112A) in the first direction (V1). The placement portion (112A1) is provided in the center of the first spacer member (112A). The corner portions (112A2) include a first corner portion (112A21) to a fourth corner portion (112A24) and are 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 with each other 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 an arrangement portion (112B1), a corner portion (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 arrangement portion (112B1) is located inside the frame. The placement portion (112B1) is a void provided for placing the second flow path member (111B) and penetrating the second spacer member (112B) in the first direction (V1). The placement portion (112B1) is provided in the center of the second spacer member (112B). The corner portions (112B2) include a first corner portion (112B21) to a second corner portion (112B24), and are provided at 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 with each other via the corner portion (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 wall member As shown in Fig. 6, the partition member (120) includes an opposing portion (121) and corner portions (122). The opposing portion (121) faces the flow path member (111). The opposing portion (121) is provided in the center of the partition member (120). The corner portions (122) include a first corner portion (1221) to a fourth corner portion (1224), and are provided at the four corners of the opposing portion (121). Recesses (400) are formed between adjacent corner portions (122).

[0065] The nth corner (202n) of the first plate member (200), the nth corner (302n) of the second plate member (300), the nth corner (112A2n) of the first spacer member (112A), the nth corner (112B2n) of the second spacer member (112B), and the nth corner (122n) of the partition member (120) are arranged so as to be stacked along the first direction (V1), where n is a natural number greater than or equal to 1 and less than or equal to 4.

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

[0067] (1-3) Refrigerant flow As shown in FIG. 7, the piping members (P) provided in the heat exchanger (1) include 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] 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 is then 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 is then discharged from the heat exchanger (1) through the refrigerant pipe (P1) of the first piping member (PA12).

[0069] 7 and 8(b), the second refrigerant flows into the refrigerant pipe (P1) of the second piping member (PA21), passes through the refrigerant pipe (P1), and is then 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 is then discharged from the heat exchanger (1) through the refrigerant pipe (P1) of the second piping member (PA22).

[0070] As shown in Figures 5(a) and 5(b), the flow path member (111) is supported by a spacer member (112). A groove (112a) is formed in the spacer member (112), and the flow path member (111) is fitted (attached) to the groove (112a), thereby positioning the flow path member (111) with respect to the spacer member (112). In this embodiment, the partition member (120) includes a plurality of frame portions arranged around the flow path member (111), and a groove (112a) is formed in a pair of frame portions (112A4, 112B3) among the plurality of frame portions that face each other via the flow path member (111), and the flow path member (111) is fitted into the groove (112a), and gaps (Q1, Q2) are provided between the flow path member (111) and each of the other pair of frame portions (112A3, 112B4) that face each other via the flow path member (111). The groove (112a) has a shape in which a surface of each of the pair of frame portions (112A4, 112B3) facing the flow path member (111) is recessed. As shown in Fig. 8(a) and Fig. 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 multiple partition members (120) is formed of a single member that connects the multiple frame portions in an annular shape so as to surround the flow path member (111).

[0071] (1-4) Diffusion bonding 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. 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 components of the heat exchanger (1) (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 bonded together by diffusion bonding, brazing, or the like. In this embodiment, the flow path member (111), the spacer member (112), and the partition member (120) are bonded together by solid-state diffusion bonding. The flow path member 111, the spacer member 112, and the partition member 120 may be bonded together by liquid phase diffusion bonding or brazing. In the following description of the first embodiment, diffusion bonding refers to solid phase diffusion bonding.

[0072] Diffusion bonding is a process in which the components of the heat exchanger (1) are joined to each other by heating the components of the heat exchanger (1) and pressing the components of the heat exchanger (1) along a first direction (V1) to create a metallic bond between the joining surfaces of the components of the heat exchanger (1).

[0073] As shown in FIG. 9(a), diffusion bonding deforms at least one of the flow path member (111) and the spacer member (112) 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 a direction perpendicular to the first direction (V1).

[0074] In this embodiment, the diffusion bonding is performed to deform the flow path member (111) so that the dimension of the flow path member (111) is reduced in the first direction (V1). Before the diffusion bonding, the dimension E1 of the flow path member (111) is larger than the dimension F1 of the spacer member (112) in the first direction (V1) (E1>F1). As shown in FIG. 9(b), after the diffusion bonding, the dimension E2 of the flow path member (111) becomes the same (including cases where they are substantially the same) as the dimension F2 of the spacer member (112) in the first direction (V1) (E2≈F2 or E2=F2). In this embodiment, in the first direction (V1), the dimension F1 of the spacer member (112) before the diffusion bonding is substantially the same (including cases where they are the same) as the dimension F2 of the spacer member (112) after the diffusion bonding (F1≈F2 or F1=F2).

[0075] Of the flow path member (111) and the spacer member (112) adjacent in a direction perpendicular to the first direction (V1), the member having a 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). This makes it possible to easily deform the flow path member (111) during diffusion bonding, and effectively reduce the dimensional difference in the first direction (V1) between the flow path member (111) and the spacer member (112).

[0076] The surface pressure of the partition member (120) at the contact point with the flow path member (111) immediately after diffusion bonding (solid-phase diffusion bonding) (immediately after deformation) 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 of the partition member (120) at the contact point with the flow path member (111) immediately after liquid-phase diffusion bonding may be 1 MPa or less.

[0077] (1-5) Dimensions of heat exchanger components Fig. 10(a) shows the stack (100) and the partition member (120) before diffusion bonding. Fig. 10(b) shows a first example of the state of the stack (100) and the partition member (120) after diffusion bonding. Fig. 10(c) shows a second example of the state of the stack (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), the dimension H of the flow path member (111) before diffusion bonding is preferably 2 mm or less.

[0083] (1-6) Shape of flow path components In this embodiment, the flow path member (111) includes a sinusoidal shape in cross section (as viewed from the direction in which the flow path formed by the flow path member (111) extends) (see FIGS. 8(a) and 8(b)). However, the present invention is not limited thereto. As shown in FIGS. 11(a) to 11(c), the flow path member (111) may include a triangular shape, a trapezoidal shape, or a round shape in cross section (as viewed from the direction in which the flow path extends). As shown in FIG. 11(a), the triangular shape is a shape in which each of the peaks (111a) and valleys (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 peaks (111a) and valleys (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 lined up along the vertical direction (V4). In this case, adjacent cylindrical members (111c) may be connected to each other, or adjacent cylindrical members (111c) may be separated from each other.

[0084] (1-7) Effects As described above, the flow path member (111), the spacer member (112), and the partition member (120) are joined together. 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, 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 by the pressure from the partition member (120) during joining (pressing by pressing during joining), thereby reducing the height difference. As a result, the components of the heat exchanger (1) can be effectively joined together. In addition, by effectively joining the components of the heat exchanger (1), an increase in the defective rate of the heat exchanger (1) can be suppressed.

[0085] In addition, the diffusion bonding can easily reduce the difference in height between adjacent flow path members (111) and spacer members (112), allowing for a margin of error in the precision of the components of the heat exchanger (1), and thus facilitating the manufacture of the heat exchanger (1).

[0086] In addition, because the difference in height between adjacent flow path members (111) and spacer members (112) can be reduced by diffusion bonding, there is no need to process the shapes of the flow path members (111) and the spacer members (112) to match their heights, which reduces the cost of such processing and thus reduces the manufacturing cost of the heat exchanger (1).

[0087] In addition, the components of the heat exchanger (1) can be made of stainless steel, a high-strength material, which effectively prevents refrigerant leakage from the heat exchanger (1). As an alternative to diffusion bonding, brazing is used, using copper as a brazing material, but copper is weaker than stainless steel. In contrast, by making the components of the heat exchanger (1) out of stainless steel and joining the components to each other by diffusion bonding, the strength of the joints between the components can be effectively ensured.

[0088] (1-8) Modified heat exchanger The modified heat exchanger (1) will be described mainly with respect to the differences from the heat exchanger (1) shown in Figs.

[0089] The modified 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 multiple flow path members (111) includes a first portion (1111) and a second portion (1112). The first portion (1111) is disposed on a side of the spacer member (112) in a direction perpendicular to the first direction (V1). 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 side (V11) of the spacer member (112) in the first direction (V1) or on the other side (V12) of the first direction (V1) in the first direction (V1).

[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. In a modified example of the heat exchanger 1, the components are joined to each other by diffusion bonding.

[0092] As a result of 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 (first portion (1111) of the flow path member (111)) and the second member (the spacer member (112) and the second portion (1112) of the flow path member (111)) that are adjacent in a direction perpendicular to the first direction (V1).

[0093] In the modified example, the diffusion bonding deforms the flow path member (111) so that the dimension of the flow path member (111) decreases in the first direction (V1). In the modified example, the surface pressure of the contact point between the partition member (120) and the flow path member (111) immediately after the diffusion bonding (solid-phase diffusion bonding) (immediately after the deformation) 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 of the contact point between the partition member (120) and the flow path member (111) immediately after the 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), the 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 the flat plate to form a plurality of recesses (A2) in parallel on the one surface (A1). In this case, in the layer member (A), the portion (A3) where the plurality of recesses (A2) are located corresponds to the flow path member (111), and the 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. The space surrounded by the recess (A2) and the partition member (120) becomes the flow path for the refrigerant.

[0098] (2) Second Embodiment Regarding the heat exchanger (1) according to the second embodiment, mainly, the differences 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 layer members (110) are laminated along a first direction (V1). A partition member (120) is disposed between adjacent layer members (110). Each of the 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 a side of the flow path member (111) in a direction perpendicular to the first direction (V1). In this embodiment, the spacer members (112) are disposed on both sides of the flow path member (111) in a direction perpendicular to the first direction (V1) (second direction (V2)).

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

[0101] In this embodiment, the multiple protrusions (111d) include a first protrusion (111d1), a second protrusion (111d2), a third protrusion (111d3), etc. (see FIG. 15(b)). The first protrusion (111d1) has an area (m1) of a cross section perpendicular to the first direction (V1), the second protrusion (111d2) has an area (m2) of a cross section perpendicular to the first direction (V1), and the third protrusion (111d3) has an area (m3) of a cross section perpendicular to the first direction (V1).

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

[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 the partition member (120) is joined 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 the partition member (120) is joined to the flow path member (111) and the spacer member (112). As shown in Fig. 15(a), before joining (when no external force is acting on the flow path member (111) and the spacer member (112)), the dimension of a portion of the flow path member (111) where the protruding portion (111d) is arranged is greater than or equal to the dimension of the spacer member (112) in the first direction (V1). As shown in Figures 15(a) and 15(b), the flow path member 111, the spacer member 112, and the partition member 120 are bonded together 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 Apparent Young's modulus G of the flow path member (111) f is the Young's modulus G of the spacer member (112) s Smaller than (G f <G s In the following, the Young's modulus G of the spacer member (112) s This article explains:

[0105] 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) applied per unit area of ​​the spacer member (112) in the first direction (V1). Young's modulus G of the spacer member (112) s is shown in the following equation 2.

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

[0107] As shown in FIG. 15(b), the pressing force S in Equation 2 is the force pressing the spacer member (112) in the first direction (V1) (the load acting on the cross-sectional area (M) of the spacer member (112)). The cross-sectional area (M) is the area of ​​a cross section (MA) of the spacer member (112) perpendicular to the first direction (V1). 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) in a state in which no external force is acting on the spacer member (112) (a state before the partition member (120) is joined to the spacer member (112)). U in Equation 2 is the amount of deformation (amount of sinking deformation, amount of contraction) 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 Apparent Young's modulus G of the flow path member (111) f is the load (S / Σm i ) is the ratio of the sinking deformation rate (u / t) of the flow path member (111) to the apparent Young's modulus G f is shown in the following equation 3.

[0109] (Number 3) G f =St / Σm i ·u

[0110] As shown in FIG. 15(b), the pressing force S of the formula 3 is a force that presses the flow path member (111) in the first direction (V1).

[0111] The dimension t in the mathematical expression 3 is the maximum dimension of the flow path member (111) in the first direction (V1) (the initial height of the flow path member (111)) in a state in which 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] In the formula 3, u is the amount of deformation (amount of sinking deformation, amount of contraction) 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 in number 3 i is the sum of the average values ​​of the areas of the cross sections perpendicular to the first direction (V1) in each of the multiple protrusions (111d) (Σm i = The average value of the cross-sectional area (m1) perpendicular to the first direction (V1) at the first protrusion (111d1) + the average value of the cross-sectional area (m2) perpendicular to the first direction (V1) at the second protrusion (111d2) + the average value of the cross-sectional area (m3) perpendicular to the first direction (V1) at the third protrusion (111d3) +···).

[0114] As shown in FIG. 15(b), in a cross-sectional view (a cross-sectional view perpendicular to the extension direction of the flow path (R) formed by the flow path member (111)), a virtual line (D) extending from each of two or more protrusions (111d) along the first direction (V1) intersects with a cross section (MA') which is the cross-sectional area (M') of the flow path member (111). 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 a cross section of a floor portion (111e) having the same dimensions as the cross section (MA) of the spacer member (112) among cross sections of the flow path member (111) perpendicular to the first direction (V1). In this embodiment, in a cross-sectional view, a virtual line (D, D1) extending from the first protrusion (111d1) in the first direction (V1) and a virtual line (D, D2) extending from the second protrusion (111d2) in the first direction (V1) intersect with the cross section (MA') of the flow path member (111). Hereinafter, a protrusion (111d) having a virtual line (D) that intersects with the cross section (MA') of the flow path member (111) in a cross-sectional view may be referred to as an intersecting protrusion (W). The multiple protrusions (111d) of the flow path member (111) include two or more intersecting protrusions (W).

[0115] (2-4) Effects As described above, the apparent Young's modulus G f is the Young's modulus G of the spacer member (112). s Smaller than (G f <G s15(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, the maximum dimension of the flow path member (111) is greater than the maximum dimension of the spacer member (112) in the first direction (V1). However, by joining, the flow path member (111) is deformed so that the dimension of the flow path member (111) in the first direction (V1) is reduced. Thus, by 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 a direction perpendicular to the first direction (V1) is reduced. The flow path member (111) is deformed by pressure from the partition member (120) during bonding (pressing during bonding). As a result, after bonding, the dimension of the flow path member (111) in the first direction (V1) becomes the same as (or approximately the same as) the dimension of the spacer member (112). As a result, bonding defects between the flow path member (111) and the spacer member (112) and the partition member (120) can be suppressed.

[0116] In addition, by reducing the rigidity of the flow path member (111), the uneven contact state between the partition member (120) and the multiple protrusions (111d) of the flow path member (111) can be improved, and therefore poor bonding between the partition member (120) and the multiple protrusions (111d) of the flow path member (111) can be reduced. As a result, the durability and reliability of the heat exchanger (1) can be improved.

[0117] In this embodiment, the protrusions (111d) are thinned so that a refrigerant flow path (R) is formed between adjacent protrusions (111d). This reduces the area of ​​a cross section perpendicular to the first direction (V1) of the protrusions (111d), thereby reducing the apparent Young's modulus G f <Young's modulus G of the spacer member (112) s The apparent Young's modulus G of the flow path member (111) is f can be made smaller.

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

[0119] (2-6) Second Modification As shown in FIG. 16(a), a hole (111da) may be formed in the flow path member (111). The hole (111da) may be a bottomed hole, or may be a hole penetrating the flow path member (111). In this embodiment, the hole (111da) is formed in the protruding portion (111d) (at least one of the protruding portions (111d) among the multiple protruding portions (111d)). Thus, by forming the hole (111da) in the flow path member (111), the apparent Young's modulus G f <Young's modulus G of the spacer member (112) s The apparent Young's modulus G of the flow path member (111) is f can be made smaller.

[0120] (2-7) Third Modification As shown in FIG. 16(b), a portion of the protrusion (111d) (at least one of the protrusions (111d)) may be thinner than the other portion. In this embodiment, the base end (111db) of the protrusion (111d) is thinner than the tip end (111dc) of the protrusion (111d). In this way, by making a portion of the flow path member (111) thinner, the apparent Young's modulus G f can be made smaller.

[0121] (2-8) Fourth Modification As shown in FIG. 16(c), the area of ​​a cross section perpendicular to the first direction (V1) may be changed in the protrusion (111d) (at least one of the multiple protrusions (111d)). In this embodiment, the cross section perpendicular to the first direction (V1) of the protrusion (111d) becomes smaller toward one side (V11) of the first direction (V1). In other words, the protrusion (111d) becomes thinner toward one side (V11) of the first direction (V1). In this way, by changing the thickness of the protrusion (111d) in the first direction (V1), the apparent Young's modulus G of the flow path member (111) can be adjusted. f can be made smaller.

[0122] (2-9) Fifth Modification 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) may be an aluminum alloy containing pure aluminum, and the material of the spacer member (112) may be a steel-based material containing pure iron and stainless steel. The material of the flow path member (111) may be a magnet alloy containing pure magnesium, and the material of the spacer member (112) may be a steel-based material containing pure iron and stainless steel. The material of the flow path member (111) may be a titanium alloy containing pure titanium, and the material of the spacer member (112) may be a steel-based material containing pure iron and stainless steel. The material of the flow path member (111) may be a copper alloy containing pure copper, and the material of the spacer member (112) may be a steel-based material containing pure iron and stainless steel. The material of the flow path member (111) may be an aluminum alloy containing pure aluminum, and the material of the spacer member (112) may be a copper alloy containing pure copper. The flow path member (111) may be made of an aluminum alloy (approximately 72 GPa) containing pure aluminum, and the spacer member (112) may be made of a titanium alloy (approximately 106 GPa) containing pure titanium. The flow path member (111) may be made of a magnetic alloy (approximately 40 GPa) containing pure magnesium, and the spacer member (112) may be made of a titanium alloy (approximately 106 GPa) containing pure titanium. The flow path member (111) may be made of a magnetic alloy (approximately 40 GPa) containing pure magnesium, and the spacer member (112) may be made of a copper alloy (approximately 117 GPa) containing pure copper. This allows the apparent Young's modulus G of the flow path member (111) to be approximately 100 GPa. f In other words, the apparent Young's modulus G of the flow path member (111) is small. f <Young's modulus G of the spacer member (112) s The material of the flow path member (111) and the material of the spacer member (112) can be different from each other so that the apparent Young's modulus G of the flow path member (111) and the spacer member (112) can be different from each other. Note that the above combination of the material of the flow path member (111) and the material of the spacer member (112) is only an example. f <Young's modulus G of the spacer member (112) s Any combination that satisfies the above requirements may be used, and the combinations are not limited to those mentioned above.

[0123] In addition, even when the protrusion (111d) is configured as in the first to fifth modified examples (when the area of ​​the cross section perpendicular to the first direction (V1) in the protrusion (111d) is not constant, the apparent Young's modulus G f is the Young's modulus G of the spacer member (112). s (G f <G s ).

[0124] Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments, modifications, and other embodiments may be appropriately combined or substituted as long as the functions of the subject of the present disclosure are not impaired.

[0125] The descriptions "first," "second," "third," etc. mentioned above are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words. [Industrial Applicability]

[0126] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a heat exchanger and a method for manufacturing a heat exchanger. [Explanation of symbols]

[0127] 1 heat exchanger 110 Layered Member 111 Flow path components 112 Spacer member 120 Partition member V1 1st direction (layer direction)

Claims

1. A plurality of layer members (110) to be stacked; a partition member (120) disposed between adjacent layer members (110); Equipped with Each of the plurality of layer members (110) comprises: a flow path member (111) for forming a flow path for a refrigerant; a spacer member (112) arranged on the flow path member (111) in a direction perpendicular to the stacking direction (V1) of the layer members (110); A heat exchanger comprising: the flow path member (111), the spacer member (112), and the partition member (120) are joined together; 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; A heat exchanger, wherein the flow path member (111) is made of a foam material.

2. A plurality of layer members (110) to be stacked; a partition member (120) disposed between adjacent layer members (110); Equipped with Each of the plurality of layer members (110) comprises: a flow path member (111) for forming a flow path for a refrigerant; a spacer member (112) arranged on the flow path member (111) in a direction perpendicular to the stacking direction (V1) of the layer members (110); A heat exchanger comprising: the flow path member (111), the spacer member (112), and the partition member (120) are joined together; 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; The flow path member (111) includes a floor portion (111e) and a protrusion (111d) protruding from the floor portion (111e), A heat exchanger, wherein a dimension of the protrusion (111d) is smaller than a dimension of the floor (111e) in the vertical direction.

3. A plurality of layer members (110) to be stacked; a partition member (120) disposed between adjacent layer members (110); Equipped with Each of the plurality of layer members (110) comprises: a flow path member (111) for forming a flow path for a refrigerant; A spacer member (112) and Including, Each of the plurality of flow path members (111) comprises: a first portion (1111) disposed on the spacer member (112) in a direction perpendicular to the stacking direction (V1) of the layer members (110); a second portion (1112) sandwiched between the spacer member (112) and the partition member (120); A heat exchanger comprising: the flow path member (111), the spacer member (112), and the partition member (120) are joined together; 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 refers to a first portion (1111) of the flow path member (111), The second member refers to the spacer member (112) and a second portion (1112) of the flow path member (111).

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

5. The heat exchanger according to claim 2 , wherein a hole (111da) is formed in the flow path member (111).

6. The heat exchanger according to claim 2 , wherein one portion of the protrusion (111d) is thinner than the other portion.

7. The heat exchanger according to claim 2 , wherein a cross-sectional area of ​​the protruding portion (111d) perpendicular to the stacking direction (V1) changes.

8. 4. The heat exchanger of claim 1, 2 or 3, wherein the material of the flow path members (111) is different from the material of the spacer members (112).

9. A plurality of the protrusions (111d) protrude from the floor portion (111e) toward one side (V11) of the stacking direction (V1), The floor portion (111e) is joined to the adjacent partition member (120) on the other side (V12) of the stacking direction (V1), the plurality of protrusions (111d) are aligned at intervals along the vertical direction and joined to the adjacent partition members (120) on one side (V11) of the stacking direction (V1); a refrigerant flow path (R) is formed between adjacent ones of the protrusions (111d), the floor portion (111e), and adjacent ones of the partition members (120) on one side (V11) of the stacking direction (V1); 3. The heat exchanger of claim 2.

10. A plurality of layer members (110) to be stacked; a partition member (120) disposed between adjacent layer members (110); Equipped with Each of the plurality of layer members (110) comprises: a flow path member (111) for forming a flow path for a refrigerant; a spacer member (112) arranged on the flow path member (111) in a direction perpendicular to the stacking direction (V1) of the layer members (110); A method for manufacturing a heat exchanger comprising the steps of: 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; The method for manufacturing a heat exchanger, wherein the flow path member (111) is made of a foamed material.

11. A plurality of layer members (110) to be stacked; a partition member (120) disposed between adjacent layer members (110); Equipped with Each of the plurality of layer members (110) comprises: a flow path member (111) for forming a flow path for a refrigerant; a spacer member (112) arranged on the flow path member (111) in a direction perpendicular to the stacking direction (V1) of the layer members (110); A method for manufacturing a heat exchanger comprising the steps of: 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; The flow path member (111) includes a floor portion (111e) and a protrusion (111d) protruding from the floor portion (111e), A method for manufacturing a heat exchanger, wherein a dimension of the protrusion (111d) is smaller than a dimension of the floor portion (111e) in the vertical direction.

12. The method for manufacturing a heat exchanger according to claim 10 or 11, wherein in the joining step, the flow path member (111), the spacer member (112), and the partition member (120) are diffusion-bonded together.

13. Before the diffusion bonding, a dimension of the flow path member (111) is larger than a dimension of the spacer member (112) in the stacking direction (V1), 13. The method for manufacturing a heat exchanger according to claim 12, wherein the flow path member (111) is deformed by performing the diffusion bonding so that a dimension of the flow path member (111) is reduced in the stacking direction (V1).

14. The method for manufacturing a heat exchanger according to claim 12, wherein a surface pressure at a contact point between the partition member (120) and the flow path member (111) immediately after the diffusion bonding is 1 MPa or more.

15. The method for manufacturing a heat exchanger according to claim 12 , wherein the flow path member (111) includes a triangular shape, a trapezoidal shape, a circular shape, or a sinusoidal shape in a cross-sectional view, and is deformed by being pressurized during the diffusion bonding.

16. the flow path member (111) is joined to one of the partition members (120) at a plurality of joining points (YA) by the diffusion bonding, the plurality of joining points (YA) are arranged at intervals along the vertical direction, 13. The method for manufacturing a heat exchanger according to claim 12, wherein after the diffusion bonding, a dimension of adjacent joint locations (YA) in the perpendicular direction is P and a dimension of the flow path member (111) in the stacking direction (V1) is h, whereby a relationship of (2 / 5)P<h<(2 / 3)P or (2 / 5)h<P<(2 / 3)h is satisfied.

17. The flow path member (111) is formed such that certain unit shapes are repeatedly arranged along the vertical direction, the flow path member (111) is joined to one of the partition members (120) at a plurality of joining points (YA) by the diffusion bonding, the plurality of joining points (YA) are arranged at intervals along the vertical direction, Before the diffusion bonding, a half length of the unit shape in a cross-sectional view of the flow path (R) formed by the flow path member (111) is defined as L, and a 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 denoted by h, the dimension of one of the joint locations (YA) in the perpendicular direction is denoted by a, and the dimension of an adjacent joint location (YA) in the perpendicular direction is denoted by P, where 0<a≦P / 2, 13. The method for manufacturing a heat exchanger according to claim 12, wherein a difference Δ(H−h) between a dimension H of the flow path member (111) in the stacking direction (V1) before the diffusion bonding and a dimension h of the flow path member (111) in the stacking direction (V1) after the diffusion bonding satisfies the relationship of the following formula 1: (Equation 1) Δ(H-h)>L-(P / 2)-√{(L-2a+P / 2)(L-P / 2)}

18. The method for manufacturing a heat exchanger according to claim 10 or 11, wherein the refrigerant includes propane.

19. 13. The method for manufacturing a heat exchanger according to claim 12, wherein a dimension of the flow path member (111) in the stacking direction (V1) before the diffusion bonding is 2 mm or less.

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