Heat exchanger and heat exchange system

Abstract

To provide a heat exchanger including a metallic connection structure for connection between heat exchangers.SOLUTION: A heat exchanger includes a heat exchanger main body, a first connection structure, a second connection structure, and a seal member. The first connection structure is a structure for connecting the heat exchanger main body onto a first connection object to be arranged on a first side of the heat exchanger. The second connection structure is a structure for connecting the heat exchanger main body onto a second connection object to be arranged on the second side of the heat exchanger. The first connection object includes a second connection structure, and the second connection object includes the first connection structure. The first connection structure and the second connection structure are tubular for the purpose of circulation of heat exchange medium and are made of metal. The second connection structure is configured to be engaged with the first connection structure so as to cover an outer circumference of the first connection structure. The seal member is arranged between an outer circumferential surface of the first connection structure and an inner circumferential surface of the second connection structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to heat exchangers and heat exchange systems. [Background technology]

[0002] Conventionally, a heat exchange system mounted on an electric vehicle is known (see, for example, Patent Document 1). In the known heat exchange system, for example, battery cells and heat exchangers are arranged alternately. The heat exchangers are interconnected to allow a heat exchange medium to circulate. In this heat exchange system, the temperature of a battery including multiple battery cells is controlled using multiple heat exchangers.

[0003] The heat exchangers in this heat exchange system are connected in series by a pipe unit connected to the inlet pipe of each heat exchanger, and the pipe unit functions as a flow path for supplying a heat exchange medium to the heat exchangers.

[0004] The pipe unit is made of resin and has a T-shaped outer shape with a branch pipe branching off at a midpoint in the longitudinal direction of the main pipe so as to be perpendicular to the main pipe. The pipe unit is attached to the heat exchanger by connecting the branch pipe to the inlet pipe of the heat exchanger body.

[0005] The main pipe section has an insertion end at one end and a receiving end at the opposite end. The insertion end is connected to the receiving end of a pipe unit connected to an adjacent heat exchanger, thereby connecting the pipe units of the multiple heat exchangers in series. A heat exchange medium is supplied to each of the multiple heat exchangers through the series-connected pipe units. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-180876 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the pipe units used in conventional heat exchange systems are T-shaped, have a fixed structure, and have a complex shape. Therefore, it is difficult to manufacture a pipe unit with the same configuration as the conventional one using metal materials from at least one of technical and cost perspectives.

[0008] Therefore, according to one aspect of the present disclosure, it is desirable to provide a heat exchanger and a heat exchange system that include a metal connection structure that can be realized by relatively simple processing of metal materials as a connection structure for connecting heat exchangers. [Means for solving the problem]

[0009] According to one aspect of the present disclosure, there is provided a heat exchanger for use in an electric vehicle. The heat exchanger includes a heat exchanger body, a first connection structure, a second connection structure, and an annular sealing member. The heat exchanger body is configured to be able to exchange heat with at least one of a first battery cell arranged on a first side of the heat exchanger and a second battery cell arranged on a second side of the heat exchanger. The second side of the heat exchanger is opposite to the first side of the heat exchanger.

[0010] The first connection structure is configured as a connection structure for connecting the heat exchanger body to a first connection object arranged on a first side of the heat exchanger via a first battery cell, and the second connection structure is configured as a connection structure for connecting the heat exchanger body to a second connection object arranged on a second side of the heat exchanger via a second battery cell.

[0011] The first connection object includes a second connection structure. The second connection object includes a first connection structure. The first connection structure and the second connection structure are cylindrical and made of metal for the flow of a heat exchange medium, and are arranged in a line in the axial direction in the heat exchanger. The second connection structure is configured to engage with the first connection structure so as to cover the outer periphery of the first connection structure.

[0012] At least one of the first and second connection structures has an annular recess facing the boundary between the first and second connection structures, the annular recess being adapted to fit a seal member. The seal member is disposed between the outer peripheral surface of the first connection structure and the inner peripheral surface of the second connection structure while being fitted into the annular recess.

[0013] This heat exchanger has a relatively simple structure related to connection and sealing. The first and second connection structures of the heat exchanger are aligned in the axial direction, i.e., the connection direction. The heat exchanger is connected to the first and second connection objects while being sandwiched between the first and second connection objects. Therefore, the connection structures are prevented from coming loose.

[0014] In this heat exchanger, the first and second connection structures are fixed to each other through a sealing member fitted into the annular recess. Furthermore, the sealing member serves to prevent leakage of the heat exchange medium. For example, when the connection structures form a flow path for the heat exchange medium, the sealing member prevents leakage of the heat exchange medium from between the outer circumferential surface of the first connection structure and the inner circumferential surface of the second connection structure.

[0015] Therefore, according to one aspect of the present disclosure, it is possible to provide a heat exchanger having a highly functional metal connection structure that can be realized by relatively simple processing of metal materials as a connection structure between heat exchangers.

[0016] According to one aspect of the present disclosure, at least one of the connection structures may be a cylindrical body having a substantially constant wall thickness, and the annular recess may be a depression formed by curvature of the cylindrical body. Such an annular recess can be easily formed in a cylindrical metal material.

[0017] According to one aspect of the present disclosure, the annular recess may be provided in the first connection structure. According to one aspect of the present disclosure, the heat exchanger may include a plurality of annular recesses as the annular recess, and a plurality of sealing members fitted into the plurality of annular recesses as the sealing members. The plurality of annular recesses may be aligned in the axial direction of at least one of the connection structures.

[0018] The seal member comes into contact with the first connection structure and the second connection structure at multiple points in the axial direction, thereby making it possible to prevent these connection structures from wobbling and tilting relative to the axis.

[0019] According to one aspect of the present disclosure, the plurality of annular recesses may be spaced apart in the axial direction, and the outer circumferential surface of the first connection structure and the inner circumferential surface of the second connection structure may be configured as axially flat surfaces between the plurality of annular recesses in the axial direction.

[0020] With this configuration, the first and second connection structures can support each other at an axially flat surface corresponding to the outer circumferential surface of the first connection structure and an axially flat surface corresponding to the inner circumferential surface of the second connection structure, thereby preventing these connection structures from wobbling relative to each other.

[0021] According to one aspect of the present disclosure, a heat exchanger may include a single tubular connection part that penetrates the heat exchanger body. The first connection structure may be provided on a portion of the single tubular connection part that protrudes from the heat exchanger body on a first side. The second connection structure may be provided on a portion of the single tubular connection part that protrudes from the heat exchanger body on a second side. By providing the first connection structure and the second connection structure in this manner, it is possible to reduce the number of parts in the heat exchanger.

[0022] According to one aspect of the present disclosure, there may be provided a heat exchange system to be mounted on an electric vehicle, the heat exchange system including a plurality of heat exchangers and a plurality of battery cells, in which the plurality of heat exchangers and the plurality of battery cells are arranged alternately in a linear fashion.

[0023] Each of the plurality of heat exchangers may be configured as the heat exchanger described above. That is, each of the plurality of heat exchangers may include the first connection structure, the second connection structure, and a seal member disposed between the first connection structure and the second connection structure. Each of the plurality of heat exchangers may be connected to an adjacent heat exchanger among the plurality of heat exchangers via the first connection structure and the second connection structure.

[0024] With this configuration, it is possible to configure a heat exchange system capable of exchanging heat with multiple battery cells by interconnecting multiple heat exchangers having metal connection structures. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view illustrating a configuration of a heat exchange system according to a first embodiment. [Figure 2] FIG. 2 is a perspective view illustrating the configuration of the heat exchanger of the first embodiment. [Figure 3] FIG. 2 is an enlarged side view of a portion of the heat exchange system. [Figure 4] 3 is a partially enlarged side view of the heat exchanger, illustrating the configuration around the first connecting pipe and the second connecting pipe. FIG. [Figure 5] 10 is a diagram illustrating how the second connecting pipe engages (specifically, fits) with the first connecting pipe so as to cover the outer periphery of the first connecting pipe. FIG. [Figure 6] 3 is a cross-sectional view showing the configuration of a cross section parallel to the axial direction of a first connecting pipe and a second connecting pipe connected to each other. FIG. [Figure 7] FIG. 10 is a partially enlarged side view of a heat exchanger illustrating the configuration around a first connecting pipe and a second connecting pipe in a second embodiment. [Figure 8] FIG. 10 is a cross-sectional view along the axial direction of an integrated connecting pipe according to a third embodiment. [Figure 9] Figure 9A is a partially enlarged side view of a heat exchanger showing the configuration around the first connecting pipe and the second connecting pipe in the fourth embodiment, and Figure 9B is a partially enlarged cross-sectional view of a heat exchanger showing the configuration around the first connecting pipe and the second connecting pipe in the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0026] Exemplary embodiments of the present disclosure will now be described with reference to the drawings. [First embodiment] 1 is a heat exchange system for an electric vehicle. The heat exchange system 1 includes a battery 10 used to drive the electric vehicle and a plurality of heat exchangers 20 for exchanging heat with the battery 10.

[0027] An electric vehicle is a vehicle that runs using all or part of the electric energy stored in the battery 10 as its power source. Examples of electric vehicles include electric vehicles, plug-in hybrid vehicles, and hybrid vehicles.

[0028] The plurality of heat exchangers 20 are provided corresponding to the plurality of battery cells 11 that make up the battery 10. The heat exchange system 1 is mounted on an electric vehicle and configured to control the temperature of the battery 10 by heat exchange.

[0029] The heat exchangers 20 are arranged in a line in a predetermined arrangement direction. One or more of the battery cells 11 that make up the battery 10 are arranged between the heat exchangers 20 in the arrangement direction. In other words, the heat exchangers 20 and the battery cells 11 are arranged alternately in a straight line in the arrangement direction.

[0030] The heat exchangers 20 have the same configuration. As shown in Fig. 2, each heat exchanger 20 includes a heat exchanger body 30, a first connecting pipe 50, a second connecting pipe 60, and an annular sealing member 80.

[0031] As shown in Fig. 3, two heat exchangers 20 adjacent in the arrangement direction are connected by a first connecting pipe 50 and a second connecting pipe 60. Fig. 3 shows the configuration of the side of the heat exchange system 1 as seen from the direction of arrow R1 shown in Fig. 1. In Fig. 3, the configuration of the first connecting pipe 50, the outer periphery of which is covered by the second connecting pipe 60, is shown transparently by dashed lines.

[0032] The heat exchangers 20 are provided with a supply pipe P1 (see FIG. 1) for supplying a heat exchange medium to the heat exchanger body 30, and a discharge pipe P2 for transporting the heat exchange medium discharged from the heat exchanger body 30. A first connecting pipe 50 and a second connecting pipe 60 are provided at the inlet and outlet of the heat exchanger body 30 in each heat exchanger 20. The first connecting pipe 50 located at the outlet of the heat exchanger body 30, which is hidden in FIG. 2, is schematically represented by a dashed line.

[0033] The supply pipe P1 is formed by connecting a first connecting pipe 50 and a second connecting pipe 60 provided at the inlets of the heat exchanger bodies 30 between the plurality of heat exchangers 20. The discharge pipe P2 is formed by connecting a first connecting pipe 50 and a second connecting pipe 60 provided at the outlets of the heat exchanger bodies 30 between the plurality of heat exchangers 20.

[0034] The heat exchanger body 30 is made of metal and has a rectangular parallelepiped shape with a small thickness in the arrangement direction. The heat exchanger body 30 is manufactured by processing a metal material such as stainless steel or plated steel.

[0035] The heat exchanger body 30 has a front surface and a back surface that are perpendicular to the arrangement direction, and the front surface and the back surface of the heat exchanger body 30 function as heat exchange surfaces. The heat exchange surfaces are configured to enable heat exchange between one or more adjacent battery cells 11 and the heat exchange medium flowing inside the heat exchanger body 30.

[0036] That is, the heat exchanger body 30 is configured to be able to exchange heat with one or more battery cells 11 arranged adjacent thereto, on at least one of the front and back surfaces of the heat exchanger 20. The front surface of the heat exchanger 20 corresponds to the front surface of the heat exchanger body 30 of the corresponding heat exchanger 20, and the back surface of the heat exchanger 20 corresponds to the back surface of the heat exchanger body 30 of the corresponding heat exchanger 20.

[0037] The heat exchanger body 30 has a flow path for the heat exchange medium in its internal space. The heat exchanger body 30 has an inlet and an outlet for the flow path of the heat exchange medium as the inlet and outlet. A first connecting pipe 50 and a second connecting pipe 60 are joined to the heat exchanger body 30 so that the heat exchange medium can flow in and out of the inlet and outlet of the flow path. Examples of joining include welding. It may be understood that all examples of joining described in multiple places below include welding.

[0038] The first connecting pipe 50 and the second connecting pipe 60 are cylindrical and made of metal for the flow of the heat exchange medium. The first connecting pipe 50 and the second connecting pipe 60 are configured, for example, in a cylindrical shape. The first connecting pipe 50 and the second connecting pipe 60 function as components of the supply pipe P1 and the discharge pipe P2 for the heat exchange medium. At the inlet of the heat exchanger body 30, the first connecting pipe 50 is joined to the surface of the heat exchanger body 30 so as to communicate with the inlet.

[0039] The first connecting pipe 50 is arranged along the arrangement direction from the surface of the heat exchanger body 30 toward the back surface of the adjacent heat exchanger 20. The first connecting pipe 50 is erected at the inlet of the heat exchanger body 30 from the surface of the heat exchanger body 30 in the normal direction thereof.

[0040] At the inlet of the heat exchanger body 30, the second connecting pipe 60 is joined to the back surface opposite the front surface of the heat exchanger body 30 so as to communicate with the inlet. The second connecting pipe 60 is arranged along the arrangement direction from the back surface of the heat exchanger body 30 toward the front surface of the adjacent heat exchanger 20. At the inlet of the heat exchanger body 30, the second connecting pipe 60 is erected from the back surface of the heat exchanger body 30 in the normal direction thereof.

[0041] Thus, at the inlet of the heat exchanger body 30, the first connecting pipe 50 is located on the front side of the heat exchanger 20 as the first side of the heat exchanger 20, and the second connecting pipe 60 is located on the back side of the heat exchanger 20 as the second side of the heat exchanger 20. The first connecting pipe 50 and the second connecting pipe 60 are arranged in a line in the axial direction. The first connecting pipe 50 and the second connecting pipe 60 are arranged coaxially.

[0042] On the other hand, at the outlet of the heat exchanger body 30, the second connecting pipe 60 is joined to the surface of the heat exchanger body 30 so as to communicate with the outlet. The second connecting pipe 60 is arranged along the arrangement direction from the surface of the heat exchanger body 30 toward the back surface of the adjacent heat exchanger 20. At the outlet of the heat exchanger body 30, the second connecting pipe 60 is erected from the surface of the heat exchanger body 30 in the normal direction thereof.

[0043] At the outlet of the heat exchanger body 30, the first connecting pipe 50 is joined to the back surface of the heat exchanger body 30 so as to communicate with the outlet. The first connecting pipe 50 is arranged along the arrangement direction from the back surface of the heat exchanger body 30 toward the front surface of the adjacent heat exchanger 20. At the outlet of the heat exchanger body 30, the first connecting pipe 50 is erected from the back surface of the heat exchanger body 30 in the normal direction thereof.

[0044] Thus, at the outlet of the heat exchanger body 30, the first connecting pipe 50 is located on the back side of the heat exchanger 20 as the first side of the heat exchanger 20, and the second connecting pipe 60 is located on the front side of the heat exchanger 20 as the second side of the heat exchanger 20. Here too, the first connecting pipe 50 and the second connecting pipe 60 are arranged in a line in the axial direction. That is, the first connecting pipe 50 and the second connecting pipe 60 are arranged coaxially.

[0045] The second connecting pipe 60 is configured to engage, specifically, fit, with the first connecting pipe 50 so as to cover the outer periphery of the first connecting pipe 50. Each heat exchanger 20 is connected to an adjacent heat exchanger 20 as a connection target via one or more battery cells 11 on at least one of the front and back sides through the fit between the first connecting pipe 50 and the second connecting pipe 60.

[0046] The supply piping P1 is constructed by fitting a first connecting pipe 50 on the front side of each of the multiple heat exchangers 20 with a second connecting pipe 60 on the back side of an adjacent heat exchanger 20, and fitting a second connecting pipe 60 on the back side of each of the multiple heat exchangers 20 with a first connecting pipe 50 on the front side of an adjacent heat exchanger 20.

[0047] Similarly, the exhaust piping P2 is constructed by fitting the second connecting pipe 60 on the front side of each of the multiple heat exchangers 20 with the first connecting pipe 50 on the back side of the adjacent heat exchanger 20, and by fitting the first connecting pipe 50 on the back side of each of the multiple heat exchangers 20 with the second connecting pipe 60 on the front side of the adjacent heat exchanger 20.

[0048] In the supply pipe P1, the heat exchange medium flows from the front side to the back side of the heat exchanger body 30, sequentially passing through the first connecting pipe 50 and the second connecting pipe 60 of each heat exchanger 20. The heat exchange medium branches off from the supply pipe P1 and flows into the inlet of the heat exchanger body 30.

[0049] The heat exchange medium flowing into the heat exchanger body 30 moves through a flow path within the heat exchanger body 30 and passes through the outlet of the heat exchanger body 30 to the discharge pipe P2. In the discharge pipe P2, the heat exchange medium moves through the first connecting pipe 50 and the second connecting pipe 60 of each heat exchanger body 30 in order so as to flow from the back side to the front side of the heat exchanger body 30.

[0050] Additionally, the heat exchanger 20E connected to the adjacent heat exchanger 20 at the most downstream of the supply pipe P1 is configured similarly to the other heat exchangers 20, but the back side of the heat exchanger 20E that is not adjacent to the other heat exchangers 20 does not include the first connecting pipe 50 and the second connecting pipe 60. That is, the heat exchanger 20 has holes communicating with the first connecting pipe 50 and the second connecting pipe 60 on both the front and back sides of the heat exchanger body 30 at the inlet and outlet of the heat exchanger 20, but the heat exchanger 20E does not have holes communicating with the first connecting pipe 50 and the second connecting pipe 60 on the back side. As a result, the supply pipe P1 and the discharge pipe P2 are closed on the back side of the heat exchanger 20E. Tubes for the heat exchange medium are attached to the first connecting pipe 50 and the second connecting pipe 60 on the front side of the heat exchanger 20 located at the frontmost side of the multiple heat exchangers 20 shown in FIG. 1 . At the tip of the tube, a connector having the same structure as one of the first connecting pipe 50 and the second connecting pipe 60 is provided, which fits into the connecting pipe to which it is attached.

[0051] Next, the detailed configurations of the first connecting pipe 50 and the second connecting pipe 60 will be described with reference to Figures 3, 4, 5, and 6. Figures 3, 4, 5, and 6 are all explanatory diagrams relating to the first connecting pipe 50 and the second connecting pipe 60 arranged at the inlet of the heat exchanger body 30.

[0052] Fig. 4 shows a side view of the configuration of the first connecting pipe 50 and the second connecting pipe 60 provided in the heat exchanger body 30. Fig. 5 explains that the second connecting pipe 60 engages (specifically, fits) with the first connecting pipe 50 so as to cover the outer periphery of the first connecting pipe 50. Fig. 6 shows the configuration of a cross section parallel to the axial direction of the first connecting pipe 50 and the second connecting pipe 60.

[0053] The first connecting pipe 50 and the second connecting pipe 60 are formed by processing a cylindrical metal material. As shown in Figures 3 and 4, the first connecting pipe 50 has a plurality of annular recesses 55, specifically two annular recesses 55, for mounting an annular seal member 80 on the outer circumferential surface that faces the boundary with the second connecting pipe 60 when the first connecting pipe 50 is fitted to the second connecting pipe 60, in other words, on the outer circumferential surface that faces the inner circumferential surface of the second connecting pipe 60. The two annular recesses 55 are aligned in the axial direction of the first connecting pipe 50.

[0054] The annular recess 55 is a portion recessed from the surrounding area on the outer circumferential surface of the first connecting pipe 50, and has a groove-like structure (in other words, a recess) extending in the circumferential direction. The annular recess 55 is formed by plastic working the cylindrical metal material that constitutes the first connecting pipe 50.

[0055] 6, the first connecting pipe 50 and the second connecting pipe 60 are formed using a cylindrical metal material having a substantially constant wall thickness. The two annular recesses 55 in the first connecting pipe 50 are formed by subjecting a cylindrical body (cylindrical metal material) having a substantially constant wall thickness to a diameter reduction process so as to deform the cylindrical body in the radial direction, in other words, to a curved shape in the radial direction.

[0056] The first connecting pipe 50 has a tapered portion 51 at the tip in the direction of insertion into the second connecting pipe 60. The tapered portion 51 is formed by plastic processing of a cylindrical metal material to facilitate fitting of the second connecting pipe 60 and the first connecting pipe 50. The tapered portion 51 is configured so that the diameter becomes smaller as it approaches the tip.

[0057] A flange portion 59 that functions as a joint with the heat exchanger body 30 is provided at the end of the first connecting pipe 50 opposite to the tapered portion 51. The flange portion 59 extends radially outward from the first connecting pipe 50. The flange portion 59 is joined to the heat exchanger body 30 by welding or the like.

[0058] The second connecting pipe 60 has an expanded diameter portion 61 at the rear end into which the first connecting pipe 50 is inserted (see FIG. 5). The expanded diameter portion 61 is provided to facilitate fitting of the second connecting pipe 60 and the first connecting pipe 50 together. The expanded diameter portion 61 is configured to have a larger diameter as it approaches the rear end. The second connecting pipe 60 is formed by plastic processing a cylindrical metal material so that the diameter of the rear end is expanded.

[0059] The second connecting pipe 60 is formed using a metal member having a larger diameter than the cylindrical metal member constituting the first connecting pipe 50, in order to fit with the first connecting pipe 50. The inner diameter of the second connecting pipe 60 is slightly larger than the outer diameter of the first connecting pipe 50.

[0060] A flange portion 69 that functions as a joint with the heat exchanger body 30 is provided at the end of the second connecting pipe 60 opposite to the expanded diameter portion 61. The flange portion 69 extends radially outward from the second connecting pipe 60. The flange portion 69 is joined to the heat exchanger body 30 by welding or the like.

[0061] The annular sealing member 80 is specifically a rubber O-ring, and has an inner diameter that is the same as or slightly smaller than the diameter of the annular recess 55. The sealing member 80 is attached so as to be fitted into each of the two annular recesses 55 provided on the outer circumferential surface of the first connecting pipe 50. When fitted into the corresponding annular recess 55 and when the first connecting pipe 50 is not engaged with the second connecting pipe 60, the sealing member 80 is positioned so as to protrude slightly radially from the outer circumferential surface of the first connecting pipe 50.

[0062] When the first connecting pipe 50 and the second connecting pipe 60 are fitted together and the inner surface of the second connecting pipe 60 covers the outer surface of the first connecting pipe 50, the sealing member 80 is positioned between the outer surface of the first connecting pipe 50 and the inner surface of the second connecting pipe 60, and deforms under the force from the inner surface of the second connecting pipe 60, and comes into close contact with the inner surface of the second connecting pipe 60 due to its elastic force.

[0063] When the sealing member 80 is deformed and fitted into the annular recess 55, it comes into close contact with the inner surface of the second connecting pipe 60 and also with the outer surface of the first connecting pipe 50, thereby sealing the gap between the outer surface of the first connecting pipe 50 and the inner surface of the second connecting pipe 60 to prevent leakage of the heat exchange medium.

[0064] According to this embodiment, two annular recesses 55 are arranged on the outer peripheral surface of the first connecting pipe 50 at a predetermined interval in the axial direction of the first connecting pipe 50. When the first connecting pipe 50 and the second connecting pipe 60 are fitted together, a portion of the outer peripheral surface of the first connecting pipe 50 located between the two annular recesses 55 and the inner peripheral surface of the second connecting pipe 60 facing this portion are flat and parallel to each other in the axial direction, and are in surface contact with each other. This surface contact allows the second connecting pipe 60 and the first connecting pipe 50 to be connected together without wobbling relative to each other in the axial direction.

[0065] According to the heat exchange system 1 of the present embodiment described above, the first connecting pipes 50 and the second connecting pipes 60 provided for each heat exchanger 20 to connect the heat exchangers 20 are arranged in a row in the axial direction on the front and back sides of the heat exchanger body 30. This axial direction is the arrangement direction of the heat exchangers 20. The multiple heat exchangers 20 constituting the heat exchange system 1 are connected via the first connecting pipes 50 and the second connecting pipes 60 with the first connecting pipes 50 and the second connecting pipes 60 lined up in the arrangement direction.

[0066] According to this embodiment, the first and second connecting pipes 60 are made of metal in consideration of durability, etc. However, metal processing has a lower degree of freedom than resin processing, and metal processing involves a large load, such as cutting. Therefore, providing a fastening structure to prevent disconnection to a metal connecting pipe is not preferable from the viewpoint of manufacturing cost and technology.

[0067] According to this embodiment, the heat exchangers 20 are connected by linearly connecting the first connecting pipe 50 and the second connecting pipe 60 along the arrangement direction of the heat exchangers 20, without providing a fixing structure to prevent them from coming off. As shown in Fig. 1, a plurality of heat exchangers 20 are connected together for use. Therefore, by arranging the first connecting pipe 50 and the second connecting pipe 60 in a row in the arrangement direction and connecting the heat exchangers 20 by fitting them together, it is possible to prevent the first connecting pipe 50 and the second connecting pipe 60 from coming off without a structure to prevent them from coming off.

[0068] The connecting pipes that are fitted together will not basically come loose unless the adjacent heat exchangers 20 are spaced apart in the arrangement direction. If the heat exchangers 20 at both ends in the arrangement direction of the heat exchange system 1 are installed so that they do not move in the arrangement direction or so that their movement is restricted, the possibility of the connecting pipes coming loose can be reduced.

[0069] Therefore, according to this embodiment, it is possible to provide the heat exchanger 20 and the heat exchange system 1 that can maintain a stable connection state with a simple connection structure.

[0070] Regarding the simple connection structure, the first connecting pipe 50 and the second connecting pipe 60 of this embodiment can be easily formed by plastic processing of a cylindrical metal member without cutting, as shown in Fig. 6. Therefore, according to this embodiment, it is possible to provide the connection structure of the heat exchanger 20 using a highly durable metal material.

[0071] According to this embodiment, the sealing member 80 is disposed in the annular recess 55, and therefore the sealing member 80 can be stably disposed between the first connecting pipe 50 and the second connecting pipe 60, which is advantageous in that good sealing can be maintained between the first connecting pipe 50 and the second connecting pipe 60. In other words, the sealing member 80 acts to suppress unwanted leakage of the heat exchange medium between the first connecting pipe 50 and the second connecting pipe 60.

[0072] According to this embodiment, the first connecting pipe 50 and the second connecting pipe 60 are fixed to each other through the seal member 80 fitted into the annular recess 55. The seal member 80 has elasticity, and generates a resistance (frictional force) against the direction in which the second connecting pipe 60 is pulled out while remaining in a fixed position (annular recess 55) relative to the first connecting pipe 50. Therefore, according to this embodiment, the seal member 80 also serves to prevent the connecting pipes from being pulled out.

[0073] Furthermore, according to this embodiment, the axially flat portion of the outer surface of the first connecting pipe 50 and the axially flat portion of the inner surface of the second connecting pipe 60, which are located between the two annular recesses 55, come into contact with each other, thereby suppressing axial wobble (in other words, oscillation) between them.

[0074] Therefore, according to this embodiment, it is possible to provide a heat exchanger 20 having a highly functional metal connection structure that can be realized by relatively simple processing of metal materials as the connection structure between the heat exchangers 20, and a heat exchange system 1 that uses this heat exchanger 20.

[0075] [Second embodiment] Next, the configuration of a heat exchanger 120 of the second embodiment will be described with reference to Fig. 7. The heat exchanger 120 of the second embodiment is configured similarly to the heat exchanger 20 of the first embodiment, except that the shapes of the first connecting pipe 150 and the second connecting pipe 160 are different from those of the first embodiment. The heat exchange system 1 described above can be equipped with the heat exchanger 120 of the second embodiment instead of the heat exchanger 20 of the first embodiment.

[0076] The following selectively describes the configuration of the heat exchanger 120 of the second embodiment that is different from that of the first embodiment. In the heat exchanger 120 of the second embodiment, the configurations that are assigned the same reference numerals as those of the heat exchanger 20 of the first embodiment may be understood to be the same configurations as those of the heat exchanger 20 of the first embodiment unless additional explanation is provided.

[0077] The heat exchanger 120 of the second embodiment includes a first connecting pipe 150 having only one annular recess 155. This first connecting pipe 150 is provided in place of the first connecting pipe 50 of the first embodiment.

[0078] As in the first embodiment, the first connecting pipe 150 is manufactured by reducing the diameter of a portion of a cylindrical metal material. By forming a radial curve in a metal material with a substantially constant thickness, the first connecting pipe 150 is provided with an annular recess 155 extending circumferentially on its outer circumferential surface. The annular seal member 80 is fitted into the annular recess 155.

[0079] As in the first embodiment, the first connecting pipe 150 has a tapered portion 151 at its tip to facilitate fitting to the second connecting pipe 160. The first connecting pipe 150 has a flange portion 159 at the end opposite to the tapered portion 151 to be joined to the heat exchanger body 30.

[0080] The second connecting pipe 160 has substantially the same shape as the second connecting pipe 60 in the first embodiment, except for its axial length. The second connecting pipe 160 has an expanded diameter portion 161 at its rear end. The second connecting pipe 160 has a flange portion 169 at its end opposite to the expanded diameter portion 161, which is joined to the heat exchanger body 30.

[0081] This second connecting pipe 160 is provided in place of the second connecting pipe 60 in the first embodiment. The second connecting pipe 160 engages (specifically, fits) with the first connecting pipe 150 so as to cover the outer periphery of the first connecting pipe 150 provided in the adjacent heat exchanger 120.

[0082] The first connecting pipe 150 is fitted into the second connecting pipe 160 provided in the adjacent heat exchanger 120 so as to be inserted inside the second connecting pipe 160. The gap between the outer circumferential surface of the first connecting pipe 150 and the inner circumferential surface of the second connecting pipe 160 is closed by the seal member 80 fitted into the annular recess 155, thereby suppressing leakage of the heat exchange medium from between the first connecting pipe 150 and the second connecting pipe 160.

[0083] In this embodiment as well, the heat exchangers 120 can be provided with a highly functional metal connection structure that can be realized by relatively simple processing of metal materials as the connection structure between the heat exchangers 120 .

[0084] [Third embodiment] Next, the configuration of a heat exchanger 220 of a third embodiment will be described with reference to Fig. 8. The heat exchanger 220 of the third embodiment has the same configuration as the heat exchanger 20 of the first embodiment, except that an integrated connecting pipe 240 having a connecting structure corresponding to the first connecting pipe 50 and the second connecting pipe 60 is provided in the heat exchanger body 230 instead of the first connecting pipe 50 and the second connecting pipe 60. The heat exchange system 1 described above can be equipped with the heat exchanger 220 of the third embodiment instead of the heat exchanger 20 of the first embodiment.

[0085] The following selectively describes configurations of the heat exchanger 220 of the third embodiment that are different from those of the first embodiment. In the heat exchanger 220 of the third embodiment, components that are assigned the same reference numerals as those of the heat exchanger 20 of the first embodiment may be understood to be the same configurations as those of the heat exchanger 20 of the first embodiment unless additional explanation is provided.

[0086] 8, an integrated connecting pipe 240, which is a single cylindrical connecting part, is provided at the inlet and outlet of the heat exchanger body 230 so as to penetrate the heat exchanger body 230 from the back side to the front side or from the front side to the back side. The integrated connecting pipe 240 is formed by processing a single cylindrical metal material, in particular, a cylindrical metal material having a substantially constant wall thickness.

[0087] The integrated connecting pipe 240 has a first connecting structure 250 at its front end, which has substantially the same shape as the first connecting pipe 50 (except for the flange portion 59), and a second connecting structure 260 at its rear end, which has substantially the same shape as the second connecting pipe 60 (except for the flange portion 69). The integrated connecting pipe 240 has a through-hole 270 between the first connecting structure 250 and the second connecting structure 260, which communicates with the internal space of the heat exchanger body 230.

[0088] When the integrated connecting pipe 240 is provided in the heat exchanger body 230 so as to penetrate the heat exchanger body 230, the integrated connecting pipe 240 protrudes from the first surface and the second surface of the heat exchanger body 230. The portion of the outer circumferential surface of the integrated connecting pipe 240 that comes into contact with the heat exchanger body 230 is joined to the heat exchanger body 230 by welding or the like. The heat exchanger body 230 has a joint portion 231 with the integrated connecting pipe 240 at a penetration portion through which the integrated connecting pipe 240 penetrates.

[0089] The first connecting structure 250 is provided on the integrated connecting pipe 240 at a portion protruding from a first surface of the heat exchanger body 230 located on the first side of the heat exchanger 220. The second connecting structure 260 is provided on the integrated connecting pipe 240 at a portion protruding from a second surface of the heat exchanger body 230 located on the second side of the heat exchanger 220.

[0090] That is, the first connecting structure 250 is arranged to protrude from a first surface of the heat exchanger body 230, and the second connecting structure 260 is arranged to protrude from a second surface of the heat exchanger body 230.

[0091] With respect to the integrated connecting pipe 240 provided at the inlet of the heat exchanger body 230, the first side of the heat exchanger 220 is the front side of the heat exchanger 220, the first surface of the heat exchanger body 230 is the front surface of the heat exchanger body 230, the second side of the heat exchanger 220 is the back side of the heat exchanger 220, and the second surface of the heat exchanger body 230 is the back surface of the heat exchanger body 230. A through-hole 270 of this integrated connecting pipe 240, which communicates with the inlet of the heat exchanger body 230, is used to supply a heat exchange medium to the heat exchanger body 230.

[0092] With respect to the integrated connecting pipe 240 provided at the outlet of the heat exchanger body 230, the first side of the heat exchanger 220 is the back side of the heat exchanger 220, the first surface of the heat exchanger body 230 is the back surface of the heat exchanger body 230, the second side of the heat exchanger 220 is the front side of the heat exchanger 220, and the second surface of the heat exchanger body 230 is the front surface of the heat exchanger body 230. A through-hole 270 of this integrated connecting pipe 240, which communicates with the outlet of the heat exchanger body 230, is used for discharging the heat exchange medium from the heat exchanger body 230.

[0093] The first connecting structure 250 has two annular recesses 255 spaced apart in the axial direction, similar to the first connecting pipe 50. The first connecting structure 250 has a tapered portion 251 at its tip to facilitate fitting with the second connecting structure 260 in the integrated connecting pipe 240 of the adjacent heat exchanger 220.

[0094] That is, the integrated connecting pipe 240 has a tapered portion 251 at the tip in the region protruding from the first surface of the heat exchanger body 230, and has two annular recesses 255 at a position closer to the heat exchanger body 230 than that.

[0095] Similar to the second connecting pipe 60, the second connecting structure 260 has an expanded diameter portion 261 at its rear end to facilitate fitting with the first connecting structure 250 in the integrated connecting pipe 240 of the adjacent heat exchanger 220. That is, the integrated connecting pipe 240 has the expanded diameter portion 261 at its rear end corresponding to the area protruding from the second surface of the heat exchanger body 230. The second connecting structure 260 engages with, or more specifically fits to, the first connecting structure 250 so as to cover the outer periphery of the first connecting structure 250.

[0096] According to this embodiment, the integrated connecting pipes 240 provided at the inlet and outlet of each heat exchanger 220 as described above are connected between the integrated connecting pipes 240 of adjacent heat exchangers 220 so that the first connecting structure 250 and the second connecting structure 260 fit together, thereby forming a supply pipe P1 and a discharge pipe P2.

[0097] According to this embodiment, in addition to obtaining the same effects as those of the first embodiment, it is possible to reduce the number of parts required when manufacturing the heat exchanger 220.

[0098] [Fourth embodiment] Next, the configuration of a heat exchanger 320 of the fourth embodiment will be described with reference to Figures 9A and 9B. The heat exchanger 320 of the fourth embodiment has the same configuration as the heat exchanger 20 of the first embodiment, except that an annular recess 365 is provided on the inner circumferential surface of the second connecting pipe 360. The heat exchange system 1 described above can be equipped with the heat exchanger 320 of the fourth embodiment instead of the heat exchanger 20 of the first embodiment.

[0099] The following selectively describes the configuration of the heat exchanger 320 of the fourth embodiment that is different from that of the first embodiment. In the heat exchanger 320 of the fourth embodiment, the configurations that are assigned the same reference numerals as those of the heat exchanger 20 of the first embodiment may be understood to be the same configurations as those of the heat exchanger 20 of the first embodiment unless additional explanation is provided.

[0100] The heat exchanger 320 of the fourth embodiment includes a first connecting pipe 350 that does not have an annular recess 55. This first connecting pipe 350 is provided in place of the first connecting pipe 50 of the first embodiment. As can be seen from FIG. 9B , the first connecting pipe 350 is a connecting pipe with a simple configuration that has a tapered portion 351 at the tip of a cylindrical metal member. The shape of the tapered portion 351 is the same as the tapered portion 51 of the first embodiment.

[0101] A flange portion 359 that functions as a joint with the heat exchanger body 30 is provided at the end of the first connecting pipe 350 opposite to the end where the tapered portion 351 is provided. The flange portion 359 extends radially outward from the first connecting pipe 350. The flange portion 359 is joined to the heat exchanger body 30 by welding or the like. The outer and inner peripheral surfaces of the first connecting pipe 350 are flat in the axial direction except for the tapered portion 351 and the flange portion 359.

[0102] On the other hand, the second connecting pipe 360 has a plurality of annular recesses 365, specifically two annular recesses 365, recessed radially outward on its inner circumferential surface facing the outer circumferential surface of the first connecting pipe 350. This second connecting pipe 360 is provided in place of the second connecting pipe 60 in the first embodiment.

[0103] The annular recess 365 is a portion recessed radially outward from the periphery on the inner circumferential surface of the second connecting pipe 360, and has a groove-like structure (in other words, a recess) extending in the circumferential direction. The annular recess 365 can be formed by plastic working the cylindrical metal material that constitutes the second connecting pipe 360.

[0104] The second connecting pipe 360 further has an expanded diameter portion 361 at its rear end, into which the first connecting pipe 350 is inserted. A flange portion 369, which functions as a joint with the heat exchanger body 30, is provided at the end of the second connecting pipe 360 opposite to the expanded diameter portion 361. The expanded diameter portion 361 and the flange portion 369 are configured in the same manner as the expanded diameter portion 61 and the flange portion 69 of the first embodiment. The flange portion 369 is joined to the heat exchanger body 30 by welding or the like.

[0105] 9B, the first connecting pipe 350 and the second connecting pipe 360 are formed using a cylindrical metal material having a substantially uniform wall thickness. However, the second connecting pipe 360 is formed using a metal member having a larger diameter than the cylindrical metal member constituting the first connecting pipe 350. The inner diameter of the second connecting pipe 360 is slightly larger than the outer diameter of the first connecting pipe 350.

[0106] The two annular recesses 365 in the second connecting pipe 360 are formed by processing a cylindrical body (a cylindrical metal material) of substantially constant thickness so as to deform it radially, in other words, to curve it radially.

[0107] An annular seal member 380 is fitted into each of the two annular recesses 365 before the second connecting pipe 360 engages with the first connecting pipe 350. The annular seal member 380 is specifically a rubber O-ring, and has an inner diameter that is the same as or slightly smaller than the diameter of the outer circumferential surface of the first connecting pipe 350 at the portion facing the annular recess 365. Furthermore, the seal member 380 can have an outer diameter that is approximately the same as the diameter of the annular recess 365.

[0108] The seal member 380 is attached so as to be fitted into each of two annular recesses 365 provided on the inner circumferential surface of the second connecting pipe 360. When fitted into the corresponding annular recesses 365 and when the second connecting pipe 360 is not engaged with the first connecting pipe 350, the seal member 380 is positioned so as to protrude slightly radially inward from the inner circumferential surface of the second connecting pipe 360.

[0109] The second connecting pipe 360 engages (specifically, fits) with the first connecting pipe 350 so that the inner peripheral surface of the second connecting pipe 360 covers the outer peripheral surface of the first connecting pipe 350, as in the first embodiment.

[0110] When the first connecting pipe 350 and the second connecting pipe 360 are engaged and the inner surface of the second connecting pipe 360 covers the outer surface of the first connecting pipe 350, the sealing member 380 is positioned between the outer surface of the first connecting pipe 350 and the inner surface of the second connecting pipe 360, and is deformed by the force from the outer surface of the first connecting pipe 350.

[0111] When the sealing member 380 is deformed and fitted into the annular recess 365, it comes into close contact with the inner surface of the second connecting pipe 360 and also with the outer surface of the first connecting pipe 350, thereby blocking the gap between the outer surface of the first connecting pipe 350 and the inner surface of the second connecting pipe 360 to prevent leakage of the heat exchange medium.

[0112] The heat exchanger 320 of this embodiment described above also provides the same effects as those of the first embodiment.

[0113] [Other embodiments] Although exemplary embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0114] For example, in the fourth embodiment, only one annular recess 365 may be provided on the inner circumferential surface of the second connecting pipe 360. The same concept as that of the integrated connecting pipe 240 of the third embodiment may be applied to the fourth embodiment.

[0115] That is, a single cylindrical connection part that integrates the first connecting pipe 350 and the second connecting pipe 360 in the fourth embodiment may be provided in the heat exchanger 320 instead of the first connecting pipe 350 and the second connecting pipe 360. In other words, in the third embodiment, the first connecting structure 250 of the integrated connecting pipe 240 may be replaced with a connecting structure similar to the first connecting pipe 350 of the fourth embodiment. The second connecting structure 260 of the integrated connecting pipe 240 may be replaced with a connecting structure similar to the second connecting pipe 360 of the fourth embodiment.

[0116] In the above-described embodiment, the first connecting pipe 50, 150, 350 and the integrated connecting pipe 240 may not have the tapered portion 51, 151, 251, 351. Similarly, the second connecting pipe 60, 160, 360 and the integrated connecting pipe 240 may not have the enlarged diameter portion 61, 161, 261, 361. The first connecting pipe 50, 150, 350, the second connecting pipe 60, 160, 360 and the integrated connecting pipe 240 may not have a cylindrical shape as long as they are tubular.

[0117] The function of one component in the above embodiments may be distributed among multiple components. The functions of multiple components may be integrated into one component. Part of the configuration of the above embodiments may be omitted. At least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified from the wording of the claims are embodiments of the present disclosure.

[0118] [Technical idea disclosed in this specification] It can be understood that the present specification discloses the following technical idea. [Item 1] A heat exchanger mounted on an electric vehicle, a heat exchanger body configured to be able to exchange heat with at least one of a first battery cell arranged on a first side of the heat exchanger and a second battery cell arranged on a second side of the heat exchanger opposite to the first side; a first connection structure for connecting the heat exchanger body to a first connection object disposed on the first side of the heat exchanger via the first battery cell; a second connection structure for connecting the heat exchanger body to a second connection object disposed on the second side of the heat exchanger via the second battery cell; an annular sealing member; Equipped with the first connection object has the second connection structure, the second connection object has the first connection structure, the first connection structure and the second connection structure are cylindrical and made of metal for allowing a heat exchange medium to flow therethrough, and are arranged in a line in the axial direction in the heat exchanger; the second connection structure is configured to engage with the first connection structure so as to cover an outer periphery of the first connection structure; at least one of the first connection structure and the second connection structure is provided with an annular recess facing a boundary between the first connection structure and the second connection structure, the annular recess being fitted with the seal member; The sealing member is disposed between the outer peripheral surface of the first connecting structure and the inner peripheral surface of the second connecting structure in a state where the sealing member is fitted into the annular recess. heat exchanger. [Item 2] Item 1. The heat exchanger according to item 1, the at least one connecting structure is a cylindrical body having a substantially constant wall thickness, The annular recess is a depression formed by curvature of the cylindrical body. heat exchanger. [Item 3] The heat exchanger according to item 1 or 2, The annular recess is provided in the first connection structure. heat exchanger. [Item 4] The heat exchanger according to any one of items 1 to 3, The annular recessed portion includes a plurality of annular recessed portions, The sealing member includes a plurality of sealing members fitted into the plurality of annular recesses, The plurality of annular recesses are aligned in the axial direction of the at least one connection structure. heat exchanger. [Item 5] Item 4. The heat exchanger according to item 4, The plurality of annular recesses are spaced apart in the axial direction, Between the plurality of annular recesses in the axial direction, the outer peripheral surface of the first connection structure and the inner peripheral surface of the second connection structure are configured as flat surfaces in the axial direction. heat exchanger. [Item 6] The heat exchanger according to any one of items 1 to 5, a cylindrical connecting part that penetrates the heat exchanger body; the first connection structure is provided at a portion of the one tubular connection part that protrudes from the heat exchanger body on the first side, The second connection structure is provided at a portion of the one cylindrical connection part that protrudes from the heat exchanger body on the second side. heat exchanger. [Item 7] A heat exchange system mounted on an electric vehicle, a plurality of heat exchangers; A plurality of battery cells; Equipped with the plurality of heat exchangers and the plurality of battery cells are arranged alternately in a linear manner, Each of the plurality of heat exchangers is configured as the heat exchanger according to any one of items 1 to 6, and includes the first connection structure, the second connection structure, and the sealing member disposed between the first connection structure and the second connection structure, Each of the plurality of heat exchangers is connected to an adjacent heat exchanger among the plurality of heat exchangers via the first connection structure and the second connection structure. Heat exchange system. [Explanation of symbols]

[0119] 1...heat exchange system, 10...battery, 11...battery cell, 20,20E,120,220,320...heat exchanger, 30,230...heat exchanger body, 50,150,350...first connecting pipe, 51,151,251,351...tapered portion, 55,155,255...annular recess, 59,159,359...flange portion, 60,160,360...second connecting pipe, 61,161,261,361...expanded portion, 69,169,369...flange portion, 80,380...sealing member, 240...integrated connecting pipe, 250...first connecting structure, 260...second connecting structure, 270...through hole, 365...annular recess, P1...supply pipe, P2...discharge pipe.

Claims

1. A heat exchanger mounted on an electric vehicle, a heat exchanger body configured to be able to exchange heat with at least one of a first battery cell arranged on a first side of the heat exchanger and a second battery cell arranged on a second side of the heat exchanger opposite to the first side; a first connection structure for connecting the heat exchanger body to a first connection object disposed on the first side of the heat exchanger via the first battery cell; a second connection structure for connecting the heat exchanger body to a second connection object disposed on the second side of the heat exchanger via the second battery cell; an annular sealing member; Equipped with the first connection object has the second connection structure, the second connection object has the first connection structure, the first connection structure and the second connection structure are cylindrical and made of metal for allowing a heat exchange medium to flow therethrough, and are arranged in a line in the axial direction in the heat exchanger; the second connection structure is configured to engage with the first connection structure so as to cover an outer periphery of the first connection structure; at least one of the first connection structure and the second connection structure is provided with an annular recess facing a boundary between the first connection structure and the second connection structure, the annular recess being fitted with the seal member; The sealing member is disposed between the outer peripheral surface of the first connecting structure and the inner peripheral surface of the second connecting structure in a state where the sealing member is fitted into the annular recess. heat exchanger.

2. 2. The heat exchanger of claim 1, the at least one connecting structure is a cylindrical body having a substantially constant wall thickness, The annular recess is a depression formed by curvature of the cylindrical body. heat exchanger.

3. 2. The heat exchanger of claim 1, The annular recess is provided in the first connection structure. heat exchanger.

4. 2. The heat exchanger of claim 1, The annular recessed portion includes a plurality of annular recessed portions, The sealing member includes a plurality of sealing members fitted into the plurality of annular recesses, The plurality of annular recesses are aligned in the axial direction of the at least one connection structure. heat exchanger.

5. 5. The heat exchanger according to claim 4, The plurality of annular recesses are spaced apart in the axial direction, Between the plurality of annular recesses in the axial direction, the outer peripheral surface of the first connection structure and the inner peripheral surface of the second connection structure are configured as flat surfaces in the axial direction. heat exchanger.

6. 2. The heat exchanger of claim 1, a cylindrical connecting part that penetrates the heat exchanger body; the first connection structure is provided at a portion of the one tubular connection part that protrudes from the heat exchanger body on the first side, The second connection structure is provided at a portion of the one cylindrical connection part that protrudes from the heat exchanger body on the second side. heat exchanger.

7. A heat exchange system mounted on an electric vehicle, a plurality of heat exchangers; A plurality of battery cells; Equipped with the plurality of heat exchangers and the plurality of battery cells are arranged alternately in a linear manner, Each of the plurality of heat exchangers is configured as the heat exchanger according to any one of claims 1 to 6, and includes the first connection structure, the second connection structure, and the seal member disposed between the first connection structure and the second connection structure, Each of the plurality of heat exchangers is connected to an adjacent heat exchanger among the plurality of heat exchangers via the first connection structure and the second connection structure. Heat exchange system.

Images