Heat exchanger, method for manufacturing heat exchanger

Abstract

To provide a heat exchanger or the like that can be produced simply and easily.SOLUTION: A heat exchanger includes a plurality of channel forming members 10 each of which is molded by extrusion to have a plurality of channels 11 for a circulating heat medium formed inside it; and an inflow member 20 that is disposed at an end of each channel forming member 10 in the channel 11 circulation direction, allows the circulation of each channel 11 formed in each channel forming member 10, and is connected to each channel forming member 10 by laser welding.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] For example, the heat exchanger described in Patent Document 1 is composed of three plates having a substantially rectangular parallelepiped shape as a whole and headers provided at both ends of the plates. The plate includes a plate body and a lid member disposed on the upper part of the plate body. These are formed by extrusion molding of aluminum or an aluminum alloy and performing T5 treatment or the like. The plate body includes a bottom wall having a substantially rectangular plate shape in plan view and side walls erected from a pair of opposite end portions of the bottom wall, and a plurality of wall members are formed upright on the upper surface of the bottom wall at predetermined intervals. The lid member includes a lid body having a substantially rectangular plate shape in plan view and a plurality of recesses formed at positions facing the wall members on the lower surface of the lid body. The joining of the plate body and the lid member can be performed by fusion welding, friction stir welding, by an adhesive, mechanical caulking, brazing, or the like. The header has a substantially U-shaped cross-sectional shape including a bottom plate, an upper plate having the same shape as the bottom plate and disposed opposite to the bottom plate, and a side plate connecting one end portion of the bottom plate and one end portion of the upper plate facing this. The header is composed of an extruded material of aluminum or an aluminum alloy. The header is formed in a continuous manner or in a shape adapted to the size of the connected plates according to the number of plates. The joining of the plate and the header can be performed by welding, brazing, friction stir welding, or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the heat exchanger described in Patent Document 1, a plate is manufactured by joining a plate body and a lid member by, for example, brazing, and a heat exchanger is manufactured by joining the plate and a header by, for example, brazing. Therefore, since there are many joining portions and the labor and time required for manufacturing increase, there is room for further improvement in manufacturing the heat exchanger. An object of the present invention is to provide a heat exchanger and the like that can be easily manufactured.

Means for Solving the Problems

[0005] The present invention completed for such an object includes a plurality of flow path forming members in which a plurality of flow paths through which a heat medium flows are formed inside by being formed by extrusion molding, and are arranged at ends in the flow direction of the flow paths in the plurality of flow path forming members, and communicate the plurality of flow paths formed in each of the plurality of flow path forming members, and a header connected to the plurality of flow path forming members using laser welding. Here, the header has a protruding portion that protrudes outward by being subjected to burring, and in a state where an end portion in the flow direction in the flow path forming member is inserted into the protruding portion, the flow path forming member and the header may be joined by irradiating the protruding portion with laser light. Further, after the burring process is performed on the workpiece, the two end portions that are bent and brought into contact with each other so as to form a space inside the workpiece are irradiated with laser light, and the two end portions may be joined. Further, it may have an intervening member interposed between the flow path forming member and the header, the header and the intervening member are joined using laser welding, and the flow path forming member and the intervening member are joined using laser welding. Further, the intervening member has a protruding portion that protrudes outward by being subjected to burring, and the end portion of the flow path forming member in the flow direction is inserted into the protruding portion, and the flow path forming member and the intervening member may be joined by irradiating the protruding portion with laser light. From another perspective, the present invention is a method for manufacturing a heat exchanger in which a flow path forming member and a header are connected, the method including a step of manufacturing the flow path forming member having a plurality of flow paths by extrusion, a step of manufacturing the header, and a step of connecting the flow path forming member and the header by laser welding. Here, the step of manufacturing the header may include a step of forming a protruding portion that protrudes outward by subjecting a workpiece to burring, and the connecting step may include a step of inserting an end portion of the flow path in the flow path forming member into the protruding portion, and a step of joining the flow path forming member and the header by irradiating the protruding portion with laser light. Further, the step of manufacturing the header may include a step of joining both end portions by irradiating laser light to both end portions that are bent and brought into contact with each other so as to form a space inside after the burring is performed. Further, after the inserting step, the protruding portion and the flow path forming member may be brought into close contact with each other by pressing the protruding portion from the outside of the protruding portion. The method may also include a step of manufacturing an intervening member interposed between the flow path forming member and the header, and the connecting step may include a step of joining the intervening member and the header using laser welding, and a step of joining the intervening member and the flow path forming member using laser welding. Further, the step of manufacturing the intervening member may include a step of forming a protruding portion that protrudes outward by subjecting a workpiece to burring, and the step of joining the intervening member and the flow path forming member may include a step of inserting an end portion of the flow path in the flow path forming member into the protruding portion, and a step of joining the flow path forming member and the header by irradiating the protruding portion with laser light.

Advantages of the Invention

[0006] According to the present invention, it is possible to provide a heat exchanger or the like that can be easily manufactured.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Modes for Carrying Out the Invention

[0008] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. <First Embodiment> FIG. 1 is a diagram showing an example of the appearance of a heat exchanger 1 according to the first embodiment. FIG. 2 is a diagram showing an example of a cross section taken along line II-II of FIG. 1. FIG. 3(a) is an enlarged view of part III of FIG. 1, and FIG. 3(b) is a perspective view of part III as seen from below.

[0009] The heat exchanger 1 includes a plurality of flow path forming members 10 in which a plurality of flow paths 11 through which a heat medium flows are formed. The flow path forming member 10 is a member having a substantially rectangular parallelepiped shape and a flat shape. In the following description of the heat exchanger 1, the longitudinal direction and the short-side direction of the flow path forming member 10 may be referred to as the "longitudinal direction" and the "short-side direction", respectively. Also, the direction orthogonal to the longitudinal direction and the short-side direction may be referred to as the "vertical direction".

[0010] The heat exchanger 1 further includes an inflow member 20 for allowing a heat medium to flow into the plurality of flow path forming members 10, and an outflow member 30 for allowing the heat medium that has flowed through the flow paths 11 of the plurality of flow path forming members 10 to flow out to the outside. In the example shown in FIG. 1, the inflow member 20 is disposed at one end in the longitudinal direction of the flow path forming member 10, and the outflow member 30 is disposed at the other end in the longitudinal direction of the flow path forming member 10.

[0011] (Flow Path Forming Member 10) The flow path forming member 10 is formed by extrusion using an aluminum material such as aluminum or an aluminum alloy, and is formed such that the extrusion direction is the longitudinal direction. The flow path forming member 10 is a flat rectangular parallelepiped member having lengths in the longitudinal direction and the short-side direction that are larger than the length in the vertical direction. The flow path forming member 10 has corner portions 12 at both ends in the short-side direction.

[0012] The flow path 11 is a through hole formed to extend in the longitudinal direction, and a plurality of flow paths 11 are formed side by side in the short-side direction. The corner portion 12 has a central portion in the vertical direction that protrudes the most, and inclined surfaces that are inclined with respect to the vertical direction are formed from the central portion toward each of the vertical ends. As shown in FIG. 2, it can be exemplified that the angle α formed by these inclined surfaces when cut by a plane orthogonal to the longitudinal direction is 60 degrees. The corner portion 12 can be exemplified as being formed by being pressed or by being cut.

[0013] (Inflow member 20, outflow member 30) The inflow member 20 is formed by subjecting a workpiece that is a single plate to press working and then laser welding. It can be exemplified that the material of the inflow member 20 is steel, aluminum, or copper. More specifically, the inflow member 20 has a cylindrical portion 21 formed by rounding the workpiece into a cylindrical shape. The first end portion 22, which is one end of the workpiece before being rounded, and the second end portion 23, which is the other end, are flat after being rounded and are overlapped at positions protruding from the outer peripheral surface of the cylindrical portion 21.

[0014] Also, before the workpiece is rounded, the workpiece is subjected to burring to form a protruding portion 24 into which the longitudinal end portion of the flow path forming member 10 is fitted. The number of protruding portions 24 formed is the same as the number of flow path forming members 10, and the plurality of protruding portions 24 are formed so as to be arranged in the short direction.

[0015] The protruding portion 24 follows the shape of the end portion of the flow path forming member 10 so as to cover the outer peripheral surface of the end portion of the flow path forming member 10. That is, the protruding portion 24 has a bent portion 25 that follows the shape of the corner portion 12 of the flow path forming member 10 at each of the both end portions in the short direction. The bent portion 25 has a central portion 26 in the vertical direction that protrudes the most, and inclined portions 27 that are inclined with respect to the vertical direction are formed from the central portion 26 toward each of the vertical ends. As shown in FIG. 2, it can be exemplified that the angle formed by these inclined portions 27 when cut by a plane orthogonal to the longitudinal direction is 60 degrees, similar to the corner portion 12 of the flow path forming member 10.

[0016] The inflow member 20 has a flat portion 28 formed flat around the protruding portion 24. In the cylindrical portion 21, the flat portion 28 remains flat, and portions other than the flat portion 28 are bent so that the first end portion 22 and the second end portion 23 overlap each other. Note that the cylindrical portion 21 may be a cylindrical shape without the flat portion 28 or a square cylindrical shape.

[0017] Note that the opening at one end in the short direction of the cylindrical portion 21 of the inflow member 20 is closed by a cap (not shown). A joint 29 is connected to the opening at the other end in the short direction of the cylindrical portion 21, and a heat medium flows into the inside of the cylindrical portion 21 through the joint 29.

[0018] Next, a method for manufacturing the inflow member 20 will be described. As described above, the method for manufacturing the inflow member 20 includes a step of performing a burring process on a workpiece that is a single plate to form the protruding portion 24, a step of rounding the workpiece, and a step of overlapping the first end portion 22 and the second end portion 23. Further, the method for manufacturing the inflow member 20 includes a step of joining, by laser welding, the first end portion 22 and the second end portion 23, which are examples of both end portions that are bent (for example, rounded) so as to form a space inside after the burring process.

[0019] FIG. 4 is a perspective view for explaining a method of joining the first end portion 22 and the second end portion 23. When joining the first end portion 22 and the second end portion 23, with the first end portion 22 and the second end portion 23 in contact, laser light L is irradiated from the laser head 151 of the laser device 150 to one end of either the first end portion 22 or the second end portion 23 from the outside. Then, the laser head 151 is moved along the shape of one end portion, in other words, in the short direction, so that the laser light L is continuously irradiated.

[0020] The laser source of the laser device 150 is not particularly limited. YAG laser, CO 2Examples thereof include a laser, a fiber laser, a disk laser, and a semiconductor laser. Further, the irradiation direction of the laser beam L may be a direction perpendicular to the flat surface of either one of the first end portion 22 and the second end portion 23, or may be a direction inclined with respect to the perpendicular direction.

[0021] Since the outflow member 30 has a symmetrical shape with the inflow member 20 with respect to the plane perpendicular to the longitudinal direction, a detailed description of the outflow member 30 will be omitted. The outflow member 30 has a cylindrical portion 31, a first end portion (not shown), a second end portion (not shown), a protruding portion 34, and a flat portion 38 corresponding to the cylindrical portion 21, the first end portion 22, the second end portion 23, the protruding portion 24, and the flat portion 28 of the inflow member 20, respectively. Further, the opening at one end in the short direction of the cylindrical portion 31 of the outflow member 30 is closed with a cap (not shown). A joint 39 is connected to the opening at the other end in the short direction of the cylindrical portion 31, and the heat medium flows out from the inside of the cylindrical portion 31 through the joint 39. Note that the inflow member 20 and the outflow member 30 may be formed by cutting.

[0022] The flow path forming member 10, the inflow member 20, and the outflow member 30 configured as described above are joined by laser welding. The method of joining the flow path forming member 10 and the inflow member 20 is the same as the method of joining the flow path forming member 10 and the outflow member 30. Hereinafter, the method of joining the flow path forming member 10 and the inflow member 20 will be described, and the method of joining the flow path forming member 10 and the outflow member 30 will be omitted.

[0023] FIG. 5 is a perspective view for explaining a method of joining the flow path forming member 10 and the inflow member 20. FIG. 5(a) is a perspective view seen from above, and FIG. 5(b) is a perspective view seen from below. When joining the flow path forming member 10 and the inflow member 20, with one end in the longitudinal direction of the flow path forming member 10 inserted into the protruding portion 24 of the inflow member 20, laser light L is irradiated from the outside of the protruding portion 24 onto the outer peripheral surface of the protruding portion 24 by the laser head 151 of the laser device 150.

[0024] The laser device 150 irradiates the laser light L continuously by moving the laser head 151 in the short side direction. First, as shown in FIG. 5(a), the laser head 151 is moved from one end in the short side direction to the other end on the upper surface of the protruding portion 24 of the inflow member 20 to irradiate the laser light L continuously. After that, the flow path forming member 10 and the inflow member 20 are rotated 180 degrees, and as shown in FIG. 5(b), the laser head 151 is moved from one end in the short side direction to the other end on the lower surface of the protruding portion 24 of the inflow member 20 to irradiate the laser light L continuously. Instead of rotating the flow path forming member 10 and the inflow member 20 by 180 degrees, the laser head 151 may be rotated by 180 degrees.

[0025] FIG. 6 is a diagram showing an example of the schematic configuration of the melted portion 152 where the flow path forming member 10 and the inflow member 20 are melted. By irradiating the laser light L from the outside of the protruding portion 24 by the method described above, a melted portion 152 where the flow path forming member 10 and the inflow member 20 are melted is formed. When irradiating the laser light L on the protruding portion 24 of the inflow member 20, the laser output and the moving speed of the laser head 151 are set to an energy density such that the melted portion 152 where the flow path forming member 10 and the inflow member 20 are melted does not reach the flow path 11 of the flow path forming member 10. Thereby, it is suppressed that the melted portion 152 inhibits the flow of the heat medium.

[0026] Also, when irradiating the protruding portion 24 of the inflow member 20 with the laser beam L, it can be exemplified that the laser beam L is irradiated in a direction orthogonal to the upper surface of the central portion in the short side direction of the protruding portion 24, in other words, in the vertical direction. That is, while irradiating the laser beam L in the vertical direction, the laser head 151 is moved from one end in the short side direction to the other end, so that the laser beam L is continuously irradiated. As a result, the laser beam L is irradiated from a direction inclined 60 degrees with respect to the outer surface of the inclined portion 27.

[0027] In other words, since the flow path forming member 10 has the corner portion 12 and the inflow member 20 has the bent portion 25, by moving the laser head 151 in the short side direction while irradiating the laser beam L in the vertical direction, a melting portion 152 can be formed between the inflow member 20 and the entire circumference of the flow path forming member 10. Thereby, it is possible to suppress the occurrence of a gap between the flow path forming member 10 and the inflow member 20. As a result, it is possible to suppress the entry and exit of the heat medium between the flow path forming member 10 and the inflow member 20. Further, it is possible to suppress the entry of muddy water or the like between the flow path forming member 10 and the inflow member 20.

[0028] Note that 60 degrees is exemplified as the angle α formed by the inclined surfaces of the corner portion 12 of the flow path forming member 10 and the angle formed by the inclined portion 27 of the protruding portion 24 of the inflow member 20. However, as long as the melting portion 152 is formed over the entire circumference of the contact portion between the flow path forming member 10 and the protruding portion 24 by moving the laser head 151 in the short side direction while irradiating the laser beam L in the vertical direction, it is not particularly limited to 60 degrees. For example, it is preferably 30 degrees to 90 degrees.

[0029] The manufacturing method of the heat exchanger 1 described above includes a step of manufacturing a flow path forming member 10 having a plurality of flow paths 11 by extrusion, a step of manufacturing an inflow member 20, and a step of joining and connecting the flow path forming member 10 and the inflow member 20 by laser welding. According to this manufacturing method, since the flow path forming member 10 in which the flow paths 11 composed of a plurality of through holes are formed by extrusion is used, and the flow path forming member 10 and the inflow member 20 are joined by laser welding, it can be manufactured more simply compared to, for example, a method of joining by brazing.

[0030] The step of manufacturing the inflow member 20 includes a step of performing a burring process on a plate-shaped workpiece. And the step of connecting the flow path forming member 10 and the inflow member 20 includes a step of inserting an end portion of the flow path 11 in the flow path forming member 10 in the flow direction of the flow path 11 into the inside of a protruding portion 24 that protrudes outward due to the burring process, and a step of joining the flow path forming member 10 and the inflow member 20 by irradiating the protruding portion 24 with a laser beam L.

[0031] And the heat exchanger 1 manufactured as described above includes a plurality of flow path forming members 10 in which a plurality of flow paths 11 through which a heat medium flows are formed inside by being formed by extrusion. Further, the heat exchanger 1 is disposed at an end portion of the flow path 11 in the flow direction in the plurality of flow path forming members 10, communicates the plurality of flow paths 11 formed in each of the plurality of flow path forming members 10, and includes an inflow member 20 as an example of a header connected to the plurality of flow path forming members 10 using laser welding.

[0032] In the heat exchanger 1 configured as described above, as shown in FIG. 1, an object to be cooled that is cooled by heat exchange by this heat exchanger 1 is placed on the upper surface of the flow path forming member 10. The object to be cooled can be exemplified as a battery pack 100 composed of a plurality of rectangular parallelepiped-shaped single cells 101.

[0033] FIG. 7 is a diagram showing the flow of the heat medium in the heat exchanger 1. In the heat exchanger 1, the heat medium flowing into the cylindrical portion 21 of the inflow member 20 reaches the flow path 11 (see FIG. 2) of each flow path forming member 10. The heat medium that has reached the flow path 11 then flows out through the cylindrical portion 31 of the outflow member 30. In this way, while the heat medium flows through the flow path 11 of the flow path forming member 10, for example, the assembled battery 100 placed on the upper surface of the flow path forming member 10 is cooled.

[0034] <Second Embodiment> The heat exchanger according to the second embodiment is different from the heat exchanger 1 according to the first embodiment in the shape of the protruding portion 240 corresponding to the protruding portion 24 of the inflow member 20 and the method of connecting the protruding portion 240 and the flow path forming member 10. Hereinafter, the differences from the first embodiment will be described. For those having the same shape and function in the first embodiment and the second embodiment, the same reference numerals are used, and the detailed description thereof is omitted.

[0035] FIG. 8 is an example of a view of the protruding portion 240 according to the second embodiment in the longitudinal direction before being connected to the flow path forming member 10. The shape of the protruding portion 240 before being connected to the flow path forming member 10 is rectangular, with the short side direction shown in FIG. 1 being the longitudinal direction and the vertical direction shown in FIG. 1 being the short side direction. As shown in FIG. 8, the protruding portion 240 has an upper portion 241 provided on the upper side in the vertical direction, a lower portion 242 provided on the lower side in the vertical direction, a left portion 243 provided on the left side in the short side direction, and a right portion 244 provided on the right side in the short side direction.

[0036] The inside of the protruding portion 240 is formed larger than the flow path forming member 10. That is, the size between the opposing upper portion 241 and lower portion 242 is larger than the size in the vertical direction of the flow path forming member 10. Also, the size between the opposing left portion 243 and right portion 244 is larger than the size in the short side direction of the flow path forming member 10.

[0037] FIG. 9 is a view showing a method of connecting the protruding portion 240 and the flow path forming member 10. FIG. 9(a) is a view of the protruding portion 240 and the flow path forming member 10 in the longitudinal direction, and FIG. 9(b) is a view of the protruding portion 240 and the flow path forming member 10 from above. After inserting one end of the longitudinal direction of the flow path forming member 10 into the protruding portion 240 (the state shown in FIG. 8), as shown in FIG. 9(a), the protruding portion 240 and the flow path forming member 10 are pressed from above and below. By pressing the protruding portion 240 and the flow path forming member 10, the upper surface of the flow path forming member 10 is brought into contact with the upper portion 241 of the protruding portion 240, and the lower surface of the flow path forming member 10 is brought into contact with the lower portion 242 of the protruding portion 240. Further, by pressing the protruding portion 240 and the flow path forming member 10, the protruding portion 240 is made to conform to the shape of the corner portion 12 of the flow path forming member 10. In this way, by pressing the protruding portion 240 and the flow path forming member 10, the protruding portion 240 and the flow path forming member 10 are brought into close contact. Also, the portions of the protruding portion 240 on the left side and the right side of the flow path forming member 10 are crushed to bring the upper portion 241 and the lower portion 242 closer together.

[0038] Thereafter, as shown in FIG. 9(b), the laser head 151 is moved from one end in the short direction to the other end on the upper surface of the protruding portion 240, so that the laser light L is continuously irradiated. Also, although not shown, the laser head 151 is moved from one end in the short direction to the other end on the lower surface of the protruding portion 240, so that the laser light L is continuously irradiated.

[0039] As a result, the protruding portion 240 and the flow path forming member 10 are joined. That is, a melted portion (not shown) can be formed between the protruding portion 240 and the entire circumference of the flow path forming member 10. Thereby, it is possible to suppress the entry and exit of the heat medium between the flow path forming member 10 and the inflow member 20.

[0040] Note that the portions of the protruding portion 240 on the left side and the right side of the flow path forming member 10 may be crushed to bring the upper portion 241 and the lower portion 242 into contact. Then, the upper portion 241 and the lower portion 242 may be joined by irradiating the portion where the upper portion 241 and the lower portion 242 are in contact with the laser light L. Thereby, it is possible to more accurately suppress the entry and exit of the heat medium between the flow path forming member 10 and the inflow member 20. Further, the outflow member 30 may also have a protruding portion (not shown) similar to the protruding portion 240 and may be joined to the flow path forming member 10. Also, in the heat exchanger 1 according to the first embodiment, after inserting one end in the longitudinal direction of the flow path forming member 10 into the protruding portion 24, the protruding portion 24 and the flow path forming member 10 may be brought into close contact with each other by pressurizing the protruding portion 24 and the flow path forming member 10.

[0041] <Third Embodiment> The heat exchanger according to the third embodiment is different from the heat exchanger 1 according to the first embodiment in that an inflow member 320 corresponding to the inflow member 20 and the inflow member 320 and the flow path forming member 10 are connected via an intervening member 340. Hereinafter, the differences from the first embodiment will be described. For those having the same shape and function in the first embodiment and the third embodiment, the same reference numerals are used, and the detailed description thereof is omitted.

[0042] FIG. 10 is a diagram showing an example of the schematic configuration of the inflow member 320 and the intervening member 340 according to the third embodiment. The inflow member 320 has a cylindrical portion 321, a first end portion 322, a second end portion 323, and a flat portion 328 corresponding to the cylindrical portion 21, the first end portion 22, the second end portion 23, and the flat portion 28 of the inflow member 20 according to the first embodiment, respectively, and does not have a portion corresponding to the protruding portion 24. A through hole 329 that communicates the inside and the outside of the cylindrical portion 321 is formed in the flat portion 328.

[0043] The intervening member 340 is formed by performing press working on a workpiece that is a single plate. Examples of the material of the intervening member 340 can be steel, aluminum, and copper. The intervening member 340 has a flat portion 341 formed flat and a protruding portion 342 protruding from the flat portion 341. The protruding portion 342 has the same shape as the protruding portion 24 according to the first embodiment, and can be exemplified as being formed by performing burring on the workpiece. The flat portion 341 is formed around the protruding portion 342.

[0044] The heat exchanger according to the third embodiment configured as described above has an intervening member 340 interposed between the flow path forming member 10 and the inflow member 320 as an example of the header. The inflow member 320 and the intervening member 340 are joined using laser welding, and the flow path forming member 10 and the intervening member 340 are joined using laser welding.

[0045] FIG. 11(a) is a perspective view for explaining a method of joining the inflow member 320 and the intervening member 340. FIG. 11(b) is a perspective view for explaining a method of joining the intervening member 340 and the flow path forming member 10. When joining the inflow member 320 and the intervening member 340, with the flat portion 328 around the through hole 329 and the flat portion 341 of the intervening member 340 in contact with each other so that the through hole 329 (see FIG. 10) and the inside of the protrusion 342 correspond, laser light L is irradiated from the laser head 151 of the laser device 150 to the flat portion 341 from the outside of the intervening member 340. Then, the laser head 151 is moved around the protrusion 342, and the laser light L is continuously irradiated to the flat portion 341 around the protrusion 342.

[0046] The method of joining the intervening member 340 and the flow path forming member 10 is the same as the method of joining the flow path forming member 10 and the inflow member 20 described with reference to FIG. 5. That is, with one end in the longitudinal direction of the flow path forming member 10 inserted into the protrusion 342 of the intervening member 340, laser light L is irradiated from the laser head 151 of the laser device 150 to the upper and lower surfaces of the protrusion 342 from the outside of the protrusion 342.

[0047] The manufacturing method of the heat exchanger according to the third embodiment described above includes a step of manufacturing the flow path forming member 10, a step of manufacturing the inflow member 320, a step of manufacturing the intervening member 340, and a step of connecting the flow path forming member 10 and the inflow member 320 by laser welding. And the step of connecting the flow path forming member 10 and the inflow member 320 includes a step of joining the intervening member 340 and the inflow member 320 using laser welding, and a step of joining the intervening member 340 and the flow path forming member 10 using laser welding. According to this manufacturing method, it can be manufactured simply, for example, compared with the method of joining by brazing.

[0048] And the heat exchanger manufactured as described above has a plurality of flow path forming members 10, an inflow member 320, and an intervening member 340 intervening between the flow path forming member 10 and the inflow member 320. The inflow member 320 and the intervening member 340 are joined using laser welding, and the flow path forming member 10 and the intervening member 340 are joined using laser welding.

[0049] Further, the intervening member 340 has a protruding portion 342 that protrudes outward by being subjected to burring. With the end portion in the flow direction in the flow path forming member 10 inserted inside the protruding portion 342, the flow path forming member 10 and the intervening member 340 are joined by irradiating the protruding portion 342 with laser light.

[0050] Also in the heat exchanger configured in this way, for example, the assembled battery 100 (see FIG. 1) is placed on the upper surface of the flow path forming member 10, and the assembled battery 100 is cooled. Note that the protruding portion 342 of the intervening member 340 may have the same shape as the protruding portion 240 according to the second embodiment. Further, after pressing the protruding portion 342 and the flow path forming member 10 to bring them into close contact with each other, the intervening member 340 and the flow path forming member 10 may be joined by laser welding.

Explanation of Reference Numerals

[0051] 1…Heat exchanger, 10…Flow path forming member, 11…Flow path, 12…Corner portion, 20…Inflow member, 21, 321…Cylindrical portion, 22…First end portion, 23…Second end portion, 24, 240, 342…Protrusion, 25…Bending portion, 26…Central portion, 27…Inclined portion, 28…Flat portion, 30…Outflow member, 100…Battery pack, 150…Laser device, 151…Laser head, 152…Melting portion

Claims

1. A plurality of flow path forming members having a plurality of flow paths through which a heat medium flows formed therein by extrusion molding; A header disposed at an end in the flow direction of the flow paths in the plurality of flow path forming members, communicating the plurality of flow paths formed in each of the plurality of flow path forming members, and connected to the plurality of flow path forming members using laser welding; Comprising: The header has a protruding portion protruding outward by being subjected to burring; With the end portion in the flow direction in the flow path forming member inserted into the protruding portion, the flow path forming member and the header are joined by irradiating the protruding portion with laser light. A heat exchanger.

2. After the burring process is performed on the workpiece, the header is formed by bending and contacting the workpiece so as to form a space therein, and both end portions are joined by irradiating laser light thereto. The heat exchanger according to claim 1.

3. A plurality of flow path forming members having a plurality of flow paths through which a heat medium flows formed therein by extrusion molding; A header disposed at an end in the flow direction of the flow paths in the plurality of flow path forming members, communicating the plurality of flow paths formed in each of the plurality of flow path forming members, and connected to the plurality of flow path forming members using laser welding; Comprising: Having an intervening member interposed between the flow path forming member and the header; The header and the intervening member are joined using laser welding; The flow path forming member and the intervening member are joined using laser welding. A heat exchanger.

4. The intervening member has a protruding portion protruding outward by being subjected to burring; With the end portion in the flow direction in the flow path forming member inserted into the protruding portion, the flow path forming member and the intervening member are joined by irradiating the protruding portion with laser light. The heat exchanger according to claim 3.

5. A method for manufacturing a heat exchanger in which a flow path forming member and a header are connected, comprising: A step of manufacturing the flow path forming member having a plurality of flow paths by extrusion molding; A step of manufacturing the header; A step of connecting the flow path forming member and the header by laser welding; Comprising: The step of manufacturing the header includes a step of forming a protruding portion protruding outward by subjecting a workpiece to burring. The step of connecting includes: inserting, inside the protruding portion, an end portion of the flow path in the flow path forming member in the flow direction of the flow path; and joining the flow path forming member and the header by irradiating the protruding portion with laser light. A method for manufacturing a heat exchanger.

6. The step of manufacturing the header includes, after performing the flanging process, joining both end portions that are bent and brought into contact with each other so as to form a space inside by irradiating laser light to the both end portions. The method for manufacturing a heat exchanger according to claim 5.

7. After the inserting step, the protruding portion and the flow path forming member are brought into close contact with each other by pressing the protruding portion from the outside of the protruding portion. The method for manufacturing a heat exchanger according to claim 5 or 6.

8. A method for manufacturing a heat exchanger in which a flow path forming member and a header are connected, a step of manufacturing the flow path forming member having a plurality of flow paths by extrusion molding; a step of manufacturing the header; a step of connecting the flow path forming member and the header by laser welding; a step of manufacturing an intervening member interposed between the flow path forming member and the header; comprising The connecting step includes a step of joining the intervening member and the header using laser welding, and a step of joining the intervening member and the flow path forming member using laser welding. A method for manufacturing a heat exchanger.

9. The step of manufacturing the intervening member includes a step of forming a protruding portion protruding outward by performing flanging on a workpiece. The step of joining the intervening member and the flow path forming member includes: inserting, inside the protruding portion, an end portion of the flow path in the flow path forming member in the flow direction of the flow path; and joining the flow path forming member and the header by irradiating the protruding portion with laser light. The method for manufacturing a heat exchanger according to claim 8.

Images