Heat exchange component

Abstract

The present invention provides a heat exchange component that can reduce the pressure loss of the heat transfer medium at the contact portion of the heat exchange component, avoid increasing thermal resistance, and also achieve weight reduction. [Solution] The medium contact portion of the heat exchange member has a deformable gyroid structure 70. The deformable gyroid structure 70 has deformable unit cells 72 obtained by deforming a unit cell of a gyroid structure so as to extend it in one direction. The flow direction of the heat medium is defined as the X direction, the direction perpendicular to the X direction is defined as the Y direction, and the direction perpendicular to the X and Y directions and parallel to the direction from the main surface 52 toward the back surface 54 is defined as the Z direction. In the deformable unit cell 72, the dimensions in the Y direction and the Z direction are the same, and the dimensions in the X direction are larger than the dimensions in the Y direction and the Z direction.

Description

Technical Field

[0001] The present disclosure relates to a heat exchange member.

Background Art

[0002] Devices that generate heat during operation are often cooled by a cooler. The cooler includes a heat exchange member that transfers the heat received from the device to a cooling medium. Heat exchange is performed between the device and the heat medium through the heat exchange member.

[0003] The heat exchange member has a medium contact portion that contacts the cooling medium. In order to meet the requirements of improving the cooling performance of the cooler and reducing the weight of the cooler, it is required to reduce the thermal resistance of the medium contact portion, reduce the pressure loss of the cooling medium in the medium contact portion, and reduce the weight of the heat exchange member.

[0004] From the perspective of reducing the thermal resistance of the heat exchange member, it has been proposed in JP-A-2023-73183, JP-A-2023-150154, and JP-A-2023-150163 to use a heat exchange member having a gyroide structure. The gyroide structure has a network-like space. In the medium contact portion, the cooling medium flows through this network-like space.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] In gyroid structures, the flow resistance to the heat transfer medium (such as a cooling medium) is high. Therefore, it is not easy to reduce the pressure loss of the heat transfer medium at the contact point.

[0007] This disclosure aims to solve the problems described above. [Means for solving the problem]

[0008] Aspects of the present disclosure are heat exchange members for performing heat exchange between a target structure and a heat transfer medium, comprising: a main surface facing the target structure; a back surface which is the surface opposite to the main surface; and a medium contact portion located between the main surface and the back surface and at least a portion of which is in contact with the heat transfer medium, wherein the medium contact portion has a deformed gyroid structure having deformed unit cells obtained by deforming a unit cell of a gyroid structure so as to extend in one direction, and when the flow direction of the heat transfer medium is the X direction, the direction perpendicular to the X direction is the Y direction, and the direction perpendicular to the X direction and the Y direction and parallel to the direction from the main surface to the back surface is the Z direction, the deformed unit cells have the same dimensions in the Y direction and the same dimensions in the Z direction, and the dimensions in the X direction are larger than the dimensions in the Y direction and the Z direction, and the deformed gyroid structure has a curved partition wall and a mesh-like space formed around the partition wall through which the heat transfer medium can pass. [Effects of the Invention]

[0009] According to this disclosure, it is possible to reduce the pressure loss of the heat transfer medium at the medium contact portion of the heat exchange member while avoiding an increase in thermal resistance. Moreover, it is possible to reduce the weight of the heat exchange member. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic perspective view of the main part of a heat exchanger equipped with a heat exchange member according to this embodiment. [Figure 2] Figure 2 is a schematic perspective view showing the deformable gyroid structure of the heat exchange member. [Figure 3]Figure 3 is a schematic perspective view showing a deformed unit cell of a deformed gyroid structure. [Figure 4] Figure 4 is a schematic perspective view illustrating a gyroid structure. [Figure 5] Figure 5 is a schematic perspective view showing a unit cell of a gyroid structure. [Figure 6] Figure 6 is a graph showing the relationship between the X-direction dimension (magnification) in a deformed unit cell and the weight and pressure loss of the heat exchange component. [Figure 7] Figure 7 is a graph showing the relationship between the diameter of the communication hole and the pressure loss and thermal resistance of the heat exchange member. [Figure 8] Figure 8 is a graph showing the relationship between the weight of the heat exchange component and its thermal resistance. [Modes for carrying out the invention]

[0011] In the following, "up" and "down" correspond to the upper and lower directions in Figure 1, respectively. However, this is a convenient orientation for the sake of simplifying the explanation and making it easier to understand, and does not necessarily correspond to the direction in which the heat exchanger 10 is actually used.

[0012] Figure 1 is a schematic perspective view of the main parts of the heat exchanger 10. The heat exchanger 10 comprises a pipe 20 through which a heat transfer medium flows and a heat exchange member 50 according to this embodiment. In this embodiment, an example is given in which the target structure 15 is a heat donor, the heat exchanger 10 is a cooler 12, and the heat transfer medium is a cooling medium. The target structure 15 is, for example, a mechanical device (such as a generator) that generates heat during operation. Alternatively, the target structure 15 is an electrical device (such as a circuit board) that generates heat during the operation of an electronic circuit. A typical example of a cooling medium is water.

[0013] Conversely, in a configuration where the heat exchanger 10 is a heater and the heat transfer medium is a heating medium, the target structure 15 may be a heat absorber. As can be understood from this, the target structure 15 is either a cooling target or a heating target.

[0014] The pipe body 20 has a forward pipe 22, a return pipe 24, and three return pipes 26 that connect the forward pipe 22 and the return pipe 24. The three return pipes 26 are housed in the housing 30. A part of the forward pipe 22 and a part of the return pipe 24 are exposed outside the housing 30. An accommodation hole 32 is formed in the upper surface 31 of the housing 30.

[0015] The return pipe 26 is substantially box-shaped and has an insertion opening (not shown) on its upper surface. The insertion opening is blocked by the heat transfer member 40. That is, the heat transfer member 40 serves as a lid member that closes the insertion opening. The upper part of the heat transfer member 40 is located within the accommodation hole 32 of the housing 30. The upper surface 42 of the heat transfer member 40 is at substantially the same height as the upper surface 31 of the housing 30.

[0016] The main surface 52 of the heat exchange member 5 O is joined to the lower surface 44 of the heat transfer member 40. The main surface 52 of the heat exchange member 50 may be in contact with the lower surface 44 of the heat transfer member 40 in a non-joined state. The heat exchange member 50 is housed inside the return pipe 26.

[0017] The heat exchange member 50 has a main surface 52 facing the target structure 15 through the heat transfer member 40 and a back surface 54 that is the surface opposite to the main surface 52. The heat exchange member 50 further has side surfaces 56 orthogonal to the main surface 52 and the back surface 54, and a medium contact portion S8 located between the main surface 52 and the back surface 54. The main surface 52 and the back surface 54 are respectively the two end faces in the Z direction of the heat exchange member 50. The side surfaces 56 are the two end faces in the X direction of the heat exchange member 50.

[0018] In the return pipe 26, the cooling medium flows along the X direction from the forward pipe 22 toward the return pipe 24. In other words, the X direction is the flow direction of the cooling medium. A direction orthogonal to the X direction and parallel to the direction from the main surface 5 Z of the heat exchange member 50 to the back surface 54 is defined as the Z direction. A direction orthogonal to the X direction and the Z direction is defined as the Y direction.

[0019] The medium contact portion 58 has the deformed gyroide structure 70 shown in FIGS. 2 and 3. This deformed gyroide structure 70 will be described in comparison with the gyroide structure 90 shown in FIGS. 4 and 5.

[0020] As shown in Figure 5, the unit cell 92 of the gyroid structure 90 has a virtual grid 93. This grid 93 is known to be cubic in shape. Therefore, in the unit cell 92 (grid 93) of the gyroid structure 90, the dimensions in the X direction, Y direction, and Z direction are the same. The gyroid structure 90 shown in Figure 4 is formed by repeatedly connecting these unit cells 92. The gyroid structure 90 is defined as a structure having a curved surface that can be represented by the following approximate formula using trigonometric functions, when the coordinates in the orthogonal coordinate system of the X-axis extending along the X direction, the Y-axis extending along the Y direction, and the Z-axis extending along the Z direction are (x,y,z). sin(x)·cos(y)+sin(y)·cos(z)+sin(z)·cos(x)=0

[0021] As shown in Figures 4 and 5, the gyroid structure 90 has a curved partition wall 94 of constant thickness and a mesh-like space 96 formed around the partition wall 94. The cooling medium can move in the X direction by flowing through the mesh-like space 96.

[0022] In contrast, the deformable gyroid structure 70 shown in Figure 2 has a deformable unit cell 72 as shown in Figure 3. The deformable unit cell 72 (deformable grid 73) is a shape obtained by deforming the unit cell 92 (grid 93) of the gyroid structure 90 so as to stretch it in one direction. In this embodiment, the stretching direction is the X direction. Therefore, in the deformable grid 73 that forms the deformable unit cell 72, the dimension in the X direction is larger than the dimensions in the Y direction and the Z direction. Also, in the deformable unit cell 72, the dimensions in the Y direction and the Z direction are the same. Therefore, the deformable grid 73 of the deformable unit cell 72 is a rectangular parallelepiped shape.

[0023] The X-direction dimension in the deformed unit cell 72 is k times the Y-direction dimension and the Z-direction dimension, where k is a positive number greater than 1. In this case, the curved surface in the deformed gyroid structure 70 can be approximated using trigonometric functions by the following formula. sin(kx)·cos(y)+sin(y)·cos(z)+sin(z)·cos(kx)=0

[0024] As shown in Figures 2 and 3, the deformable gyroid structure 70, which uses the deformable unit cell 72 as its basic unit, has partition walls 74 and mesh-like spaces 76. The partition walls 74 and mesh-like spaces 76 correspond to the partition walls 94 and mesh-like spaces 96 formed based on the gyroid structure 90.

[0025] When heat exchange members 50 with different k values ​​but the same external dimensions (volume) are manufactured, the weight of the heat exchange member 50 decreases as the k value increases. Figure 6 is a graph showing the relationship between the k value and the weight and pressure loss of the heat exchange member 50. The vertical axis is logarithmic. From Figure 6, it can be seen that increasing the k value can reduce the weight of the heat exchange member 50 and also reduce the pressure loss of the cooling medium.

[0026] However, in the heat exchange member 50, the thermal resistance increases as the weight decreases. From this viewpoint, it is preferable to set the value of k such that the pressure loss, weight, and thermal resistance are within an acceptable range. In one embodiment, when k exceeds 2, the pressure loss decreases while the thermal resistance increases. Also, when k is less than 1.5, it is not easy to reduce the pressure loss. Therefore, in this embodiment, the preferred range for k is 1.5 to 2. In other words, it is preferable that the X-direction dimension of the deformation unit cell 72 is 1.5 to 2 times the Y-direction dimension and the Z-direction dimension. This makes it possible to obtain a heat exchange member 50 that is lightweight, has low pressure loss, and low thermal resistance, however, k is not limited to the range of 1.5 to 2.

[0027] In the embodiments shown in Figures 2 and 3, the media contact portion 58 has a plurality of communication holes 78 (see Figure 3) that penetrate the partition wall 74. By forming a plurality of communication holes 78 in the partition wall 74, the weight of the heat exchange member 50 is reduced compared to a case where a plurality of communication holes 78 are not formed in the partition wall 74.

[0028] Each of the multiple communication holes 78 connects adjacent portions of the mesh-like space 76 via the partition walls 74. Each of the multiple communication holes 78 extends along the X direction. Therefore, a portion of the cooling medium flowing through the mesh-like space 76 moves along the communication holes 78 in the X direction and flows into adjacent mesh-like spaces 76 via the partition walls 74. As a result, pressure loss is reduced compared to a configuration where multiple communication holes 78 are not formed in the partition walls 74.

[0029] Figure 7 is a graph showing the relationship between the diameter D of the communication hole 78 and the pressure loss and thermal resistance of the heat exchange member 50. "None" indicates the result in an embodiment where the communication hole 78 does not exist. From Figure 7, it can be seen that the pressure loss decreases as the diameter D of the communication hole 78 increases. On the other hand, the thermal resistance increases as the diameter D of the communication hole 78 increases. From this viewpoint, it is preferable to set the diameter D of the communication hole 78 so that the pressure loss, weight, and thermal resistance are within acceptable limits. In one embodiment, a preferred diameter D of the communication hole 78 is 0.1 mm to 0.5 mm. However, the diameter D of the communication hole 78 is not limited to the range of 0.1 mm to 0.5 mm.

[0030] As shown in Figures 2 and 3, the partition wall 74 has a curved side portion 80 that appears on the side surface 56. The curved side portion 80 extends in a curved manner from the main surface 52 toward the back surface 54. In the example shown in Figure 2, the deformation unit cell 72 is not repeated in the Z direction of the heat exchange member 50. That is, the number of repetitions of the deformation unit cell 72 in the Z direction is 0. Therefore, the number of layers of the deformation gyroid structure 70 in the heat exchange member 50 is 1 layer.

[0031] The illustrated example shows a specification in which the thickness W in the Y direction of the side curved portion 80 changes. Specifically, the thickness W in the Y direction of the side curved portion 80 decreases from the main surface 52 toward the center in the Z direction, and increases from the center in the Z direction toward the back surface 54. In other words, the side curved portion 80 has a minimum thickness portion 82 in the center in the Z direction and maximum thickness portions 84 at both ends in the Z direction. The minimum thickness portion 82 refers to the part where the thickness W in the Y direction is smallest. The maximum thickness portion 84 refers to the part where the thickness W in the Y direction is largest.

[0032] Figure 8 is a graph showing the relationship between the weight of the heat exchange member 50 and its thermal resistance. The thin solid line represents the result for a specification where the thickness W in the Y direction of the side curved portion 80 is constant (constant specification). The thick solid line represents the result for a specification where the side curved portion 80 has a minimum thickness portion 82 in the center in the Z direction and maximum thickness portions 84 at both ends in the Z direction (thin-walled center specification). The dashed line represents the result for a specification where the side curved portion 80 has minimum thickness portions 82 at both ends in the Z direction and maximum thickness portion 84 in the center in the Z direction (thick-walled center specification). In all three specifications, the thickness W1 of the minimum thickness portion 82 is 0.5 times the thickness W2 of the maximum thickness portion 84.

[0033] Figure 8 shows that, for the same weight, the thin-walled central specification has lower thermal resistance compared to the constant-walled and thick-walled central specifications. Furthermore, in the thin-walled central specification, the heat transfer medium flows more easily due to the smaller thickness W compared to the constant-walled specification, resulting in lower pressure loss. Therefore, among the three specifications described above, the thin-walled central specification is preferred. However, the specifications of the curved side section 80 are not limited to the thin-walled central specification. The curved side section 80 may be a constant-walled or thick-walled central specification.

[0034] In a centrally thin-walled specification, if the thickness W1 of the minimum wall thickness section 82 is made excessively small, the thermal resistance of the heat exchange member 50 increases, and the strength of the heat exchange member 50 decreases. From this viewpoint, it is preferable to set the thickness W1 of the minimum wall thickness section 82 so that the pressure loss, weight, and thermal resistance are within acceptable limits. In one embodiment, the preferred thickness W1 of the minimum wall thickness section 82 is 0.5 to 0.9 times the thickness W2 of the maximum wall thickness section 84. However, the thickness W1 of the minimum wall thickness section 82 is not limited to 0.5 to 0.9 times the thickness W2 of the maximum wall thickness section 84.

[0035] If the number of repetitions of the deformation unit cell 72 in the Z direction is 1 and the number of layers is 2, in other words, if the deformation gyroid structure 70 has a first layer and a second layer, the center in the Z direction is the boundary between the first layer and the second layer. Therefore, the minimum thickness portion 82 is located at the boundary between the first layer and the second layer. Thus, even in a shape in which multiple deformation gyroid structures 70 are stacked along the Z direction, the maximum thickness portion 84 of the side curved portion 80 is located at both ends in the Z direction, and the minimum thickness portion 82 of the side curved portion 80 is located in the center in the Z direction.

[0036] As shown in Figures 2 and 3, the partition wall 74 has a main surface curved portion 86 that appears on the main surface 52. The main surface curved portion 86 extends on the main surface 52, curving from one end in the Y direction to the other. The thickness T along the X direction of the main surface curved portion 86 is constant.

[0037] A deformed gyroid structure 70 having the shape described above can be manufactured, for example, by additive manufacturing using metal powder. When forming a communication hole 78 that penetrates the partition wall 74, the partition wall 74 is drilled after additive manufacturing. For drilling, for example, a laser or a drilling tool can be used.

[0038] Next, a method for cooling the target structure 15 (see Figure 1) using the heat exchange member 50 will be described.

[0039] As shown in Figure 1, a portion of the lower surface of the target structure 15 is in contact with the upper surface 31 of the housing 30 of the cooler 12. At the same time, another portion of the lower surface of the target structure 15 is in contact with the upper surface 42 of the heat transfer member 40. Furthermore, a cooling medium such as water is supplied to the pipe 20. The cooling medium flows through the forward pipe 22 and branches into three return pipes 26. The cooling medium flowing through the return pipes 26 comes into contact with the medium contact portion 58 of the heat exchange member 50.

[0040] In the medium contact portion 58, the cooling medium flows through the mesh-like space 76 of the deformed gyroid structure 70 shown in Figures 2 and 3. In the configuration in which a communication hole 78 (see Figure 3) is formed in the partition wall 74, a portion of the cooling medium flowing through the mesh-like space 76 passes through the communication hole 78 and flows into an adjacent mesh-like space 76 via the partition wall 74. In this state, the target structure 15 generates heat, for example, during operation.

[0041] The heat generated by the target structure 15 is transferred to the main surface 52 of the heat exchange member 50 via the heat transfer member 40. The heat is further transferred to the medium contact portion 58 of the heat exchange member 50. Since the medium contact portion 58 is in contact with the cooling medium, the heat is quickly transferred to the medium contact portion 58. In this way, the heat from the target structure 15 is quickly dissipated to the cooling medium via the heat exchange member 50. In other words, the target structure 15 exchanges heat with the cooling medium via the heat exchange member 50. As a result, the target structure 15 is cooled.

[0042] As described above, in this embodiment, the thermal resistance of the heat exchange member 50 is small. Therefore, the heat absorbed by the main surface 52 of the heat exchange member 50 from the target structure 15 is rapidly diffused in the medium contact portion 58. In addition, the pressure loss of the cooling medium flowing through the mesh-like space 76 of the medium contact portion 58 is small. Consequently, the cooling medium, which has become hot after absorbing heat from the medium contact portion 58, rapidly flows through the medium contact portion 58 and flows into the return pipe 24 via the folded pipe 26 shown in Figure 1.

[0043] The high-temperature cooling medium flows through the return pipe 24 and is discharged to the outside of the housing 30. At the same time, a new, low-temperature cooling medium flows into the return pipe 26 via the outbound pipe 22. This process is repeated, ensuring continuous cooling of the target structure 15.

[0044] This embodiment provides the following effects.

[0045] The medium contact portion 58 of the heat exchange member 50 shown in Figure 1 has a deformable gyroid structure 70 as shown in Figures 2 and 3. The deformable unit cell 72 (see Figure 3) of the deformable gyroid structure 70 is a shape obtained by deforming the unit cell 92 of the gyroid structure 90 shown in Figure 5 so as to extend in one direction (the X direction, which is the flow direction of the cooling medium). The deformable gyroid structure 70 has a curved partition wall 74 and a mesh-like space 76 formed around the partition wall 74.

[0046] Since the mesh-like space 76 extends along the flow direction (X direction) of the cooling medium, the cooling medium flows easily through the mesh-like space 76. As a result, the pressure loss of the cooling medium is smaller compared to the gyroid structure 90. Consequently, the cooling medium, which has become hot after receiving heat from the target structure 15, is prevented from accumulating in the medium contact portion 58. As a result, the heat exchange performance of the heat exchange member 50 is higher than when the gyroid structure 90 is used. For these reasons, it is possible to miniaturize the heat exchange member 50 while maintaining its heat exchange performance.

[0047] Furthermore, when the volume of a heat exchange member 50 composed of a deformed gyroid structure 70 is the same as the volume of a heat exchange member 50 composed of a gyroid structure 90, the former has fewer unit cells 92 (number of repetitions) than the latter. Therefore, the former is lighter than the latter. Consequently, it is possible to reduce the weight of the heat exchange member 50.

[0048] In one embodiment, the X-direction dimension of the deformable unit cell 72 shown in Figure 3 is 1.5 to 2 times the Y-direction and Z-direction dimensions. In this case, it is possible to reduce the pressure loss of the cooling medium in the heat exchange member 50 while avoiding an increase in the thermal resistance of the heat exchange member 50.

[0049] In the embodiments shown in Figures 2 and 3, the thickness W along the Y direction of the curved side portion 80 decreases from the main surface 52 toward the center in the Z direction, and increases from the center in the Z direction toward the back surface 54. In other words, in this embodiment, a thin-walled specification in the center is adopted.

[0050] At the center in the Z direction, the thickness W of the side curved portion 80 is small. This allows for a reduction in the weight of the heat exchange member 50. Furthermore, at the end adjacent to the main surface 52, the thickness W of the side curved portion 80 is large. This allows heat from the target structure 15 received by the main surface 52 to easily move in the Z direction through the side curved portion 80. Similarly, at the end adjacent to the back surface 54, the thickness W of the side curved portion 80 is large. This allows heat moved in the Z direction to easily dissipate to the cooling medium through the medium contact portion 58. Consequently, an increase in the thermal resistance of the heat exchange member 50 is avoided.

[0051] In the embodiments shown in Figures 2 and 3, the thickness T along the X direction of the main surface curved portion 86 is constant. With this configuration, the area of ​​the main surface curved portion 86 is increased, so that the main surface curved portion 86 can sufficiently absorb the heat of the target structure 15.

[0052] In the embodiments shown in Figures 2 and 3, the media contact portion 58 has a plurality of communication holes 78 that extend along the X direction so as to penetrate the partition wall 74. Each of the plurality of communication holes 78 allows adjacent portions of the mesh-like space 76 to communicate with each other through the partition wall 74.

[0053] With this configuration, a portion of the cooling medium flowing through the mesh-like space 76 moves to an adjacent mesh-like space 76 via the communication hole 78 and the partition wall 74. As a result, the pressure loss of the cooling medium at the medium contact portion 58 can be further reduced. In other words, the heat exchange performance of the heat exchange member 50 is further improved.

[0054] In one embodiment, the diameter D of the communication hole 78 is 0.1 mm to 0.5 mm. In this case, the pressure loss of the cooling medium at the medium contact portion 58 can be reduced, and an increase in the thermal resistance of the heat exchange member 50 can be avoided. Moreover, the weight of the heat exchange member 50 can be reduced.

[0055] The following additional information is disclosed regarding the above embodiments.

[0056] (Note 1) The heat exchange member (50) of the present disclosure is a heat exchange member for performing heat exchange between a target structure (15) and a heat transfer medium, comprising: a main surface (52) facing the target structure; a back surface (54) opposite to the main surface; and a medium contact portion (58) located between the main surface and the back surface, with at least a portion of it in contact with the heat transfer medium, wherein the medium contact portion has a deformed gyroid structure (70) having a deformed unit cell (72) obtained by deforming a unit cell (92) of a gyroid structure (90) so as to extend in one direction. When the flow direction of the heat transfer medium is defined as the X direction, the direction perpendicular to the X direction as the Y direction, and the direction perpendicular to the X and Y directions and parallel to the direction from the main surface toward the back surface as the Z direction, the deformed unit cell has the same dimensions in the Y direction and the same dimensions in the Z direction, and the dimensions in the X direction are larger than the dimensions in the Y direction and the Z direction, and the deformed gyroid structure has a curved partition wall (74) and a mesh-like space (76) formed around the partition wall through which the heat transfer medium can pass.

[0057] A modified gyroid structure, which has a deformed unit cell in which the unit cell of the gyroid structure is stretched along one direction, can reduce the pressure loss of the heat transfer medium flowing through the mesh-like space. Therefore, it is possible to miniaturize the auxiliary equipment for flowing the heat transfer medium and the heat exchange member while maintaining the heat exchange performance of the heat exchange member. Furthermore, it is possible to reduce the weight of the heat exchange member.

[0058] (Note 2) In the heat exchange member described in Appendix 1, the dimension in the X direction of the deformation unit cell may be 1.5 to 2 times the dimensions in the Y direction and the Z direction. In this case, the pressure loss of the heat transfer medium in the heat exchange member can be reduced, and an increase in the thermal resistance of the heat exchange member can be avoided.

[0059] (Note 3) In the heat exchange member described in Appendix 1 or 2, the partition wall has a side surface (56) located between the main surface and the back surface and perpendicular to the X direction, and the partition wall has a curved side portion (80) that appears on the side surface and extends while curving from the main surface toward the back surface, and in the curved side portion, the thickness (W) along the Y direction may decrease from the main surface toward the center in the Z direction and increase from the center in the Z direction toward the back surface.

[0060] This configuration allows for a reduction in the thickness of the curved side portion at the center in the Z direction. As a result, the thermal resistance of the heat exchange component can be reduced and its weight can be minimized.

[0061] (Note 4) In the heat exchange member described in Appendix 3, the side curved portion has a minimum thickness portion (82) in which the thickness along the Y direction is the minimum, and a maximum thickness portion (84) in which the thickness along the Y direction is the maximum, and the thickness of the minimum thickness portion may be 0.5 to 0.9 times the thickness of the maximum thickness portion.

[0062] This makes it possible to avoid an increase in the thermal resistance of the heat exchange component.

[0063] (Note 5) In the heat exchange member described in Appendix 3 or 4, the partition wall has a main surface curved portion (86) that appears on the main surface and extends while curving from one end to the other in the Y direction, and the thickness (T) along the X direction in the main surface curved portion may be constant.

[0064] On the main surface facing the target structure, heat is exchanged between the curved portion of the main surface and the target structure. With the above configuration, the area of ​​the curved portion of the main surface is increased, so that the curved portion of the main surface can exchange heat sufficiently.

[0065] (Note 6) In the heat exchange member described in any one of the appendices 1 to 5, the medium contact portion has a plurality of communication holes (78) that penetrate the partition wall, and each of the plurality of communication holes extends along the X direction and may communicate adjacent portions of the mesh-like space with each other via the partition wall.

[0066] In this case, a portion of the heat transfer medium flows through a mesh-like space via multiple connecting holes. Therefore, the pressure loss of the heat transfer medium at the contact point can be further reduced.

[0067] (Note 7) In the heat exchange member described in Appendix 6, the diameter (D) of the communication hole may be 0.1 mm to 0.5 mm.

[0068] This allows for further reduction of pressure loss in the heat transfer medium at the contact point with the heat transfer medium, while avoiding an increase in the thermal resistance of the heat exchange component. Moreover, it enables weight reduction of the heat exchange component.

[0069] While this disclosure has been described in detail, it is not limited to the individual embodiments described above. These embodiments can be added, replaced, modified, partially deleted, etc., in any way that does not depart from the gist of this disclosure or from the intent of this disclosure derived from the claims and their equivalents. These embodiments can also be implemented in combination. For example, the order of operations and processes in the embodiments described above are given as examples only and are not limited thereto. The same applies when numerical values ​​or mathematical formulas are used in the description of the embodiments described above. [Explanation of symbols]

[0070] 10…Heat exchanger 15…Target structure 50…Heat exchange component 52…Main surface 54…Back side 56…Side 58...Media contact area 70...Deformable gyroid structure 72...Deformable unit cell 74, 94...Partition 76, 96... Mesh-like space 78... Communication hole 80...Curved side section 82...Minimum thickness section 84...Thickest part 86...Curved part of the main surface 90...Gyroid structure 92...Unit cell

Claims

1. A heat exchange member for performing heat exchange between a target structure and a heat transfer medium, The structure comprises a main surface facing the target structure, a back surface which is the surface opposite to the main surface, and a medium contact portion located between the main surface and the back surface, with at least a portion of it in contact with the heat transfer medium. The media contact portion has a deformed gyroid structure having a deformed unit cell obtained by deforming a gyroid unit cell so as to extend it in one direction, When the flow direction of the heat transfer medium is defined as the X direction, the direction perpendicular to the X direction as the Y direction, and the direction perpendicular to the X and Y directions and parallel to the direction from the main surface toward the back surface as the Z direction, the deformation unit cell has the same dimensions in the Y direction and the same dimensions in the Z direction, and the dimensions in the X direction are larger than the dimensions in the Y direction and the Z direction. The deformed gyroid structure is a heat exchange member having a curved partition wall and a mesh-like space formed around the partition wall through which the heat transfer medium can pass.

2. A heat exchange member according to claim 1, wherein the dimension in the X direction of the deformation unit cell is 1.5 to 2 times the dimensions in the Y direction and the Z direction.

3. The heat exchange member according to claim 1, comprising a side surface located between the main surface and the back surface and perpendicular to the X direction, The partition wall has a curved side portion that appears on the side surface and extends while curving from the main surface toward the back surface, A heat exchange member in which, in the curved side portion, the thickness along the Y direction decreases from the main surface toward the center in the Z direction, and increases from the center in the Z direction toward the back surface.

4. In the heat exchange member according to claim 3, the side curved portion has a minimum thickness portion in which the thickness along the Y direction is the minimum, and a maximum thickness portion in which the thickness along the Y direction is the maximum, A heat exchange member in which the thickness of the minimum thickness portion is 0.5 to 0.9 times the thickness of the maximum thickness portion.

5. In the heat exchange member according to claim 3, the partition wall has a main surface curved portion that appears on the main surface and extends while curving from one end to the other in the Y direction, A heat exchange member in which the thickness along the X direction is constant in the main curved portion.

6. In the heat exchange member according to any one of claims 1 to 5, the medium contact portion has a plurality of communication holes penetrating the partition wall, A heat exchange member in which each of the plurality of communication holes extends along the X direction and connects adjacent portions of the mesh-like space to each other via the partition wall.

7. A heat exchange member according to claim 6, wherein the diameter of the communication hole is 0.1 mm to 0.5 mm.

Images