Cooling device and cooling unit

Abstract

The invention relates to a cooling device and a cooling unit. A cooling device according to one embodiment of the present disclosure is provided with a cover, a first elbow, a second elbow, a first flow path pipe, and a second flow path pipe. The cover has a first opening and a second opening through which a refrigerant flows on the first surface. The first bend is located on the first face and connected with the first opening. The second bend is located on the first face and connected with the second opening. The first flow path pipe is located on the first face and connected with the first elbow. The second flow path pipe is located on the first face and connected with the second elbow. When viewed from a direction orthogonal to the first surface, the first flow path pipe linearly extends in a direction inclined with respect to the flow path direction of the second elbow at a position adjacent to the second elbow, or the second flow path pipe bends in a direction away from the first elbow at a position adjacent to the first elbow.

Description

Technical Field

[0001] This disclosure relates to a cooling device and a cooling unit. Background Technology

[0002] Cooling devices that use refrigerant flowing through an internal flow path to cool a heat source are known. Patent Document 1 discloses a cooling unit that uses flow path pipes to connect multiple cooling devices.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: U.S. Patent Application Publication No. 2022 / 0261019. Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In cooling systems, constraints such as the installation location sometimes limit the access points for flow lines connecting to or from the cooling system. Furthermore, it is sometimes desirable for refrigerant to flow from areas with high heating temperatures within the cooling system. Moreover, from a piping workability perspective, it is sometimes necessary to allow for slack in the winding of the flow lines. Due to these factors, the winding of the flow lines relative to the cooling system can become complex.

[0008] As the routing of the flow path relative to the cooling unit becomes more complex, bends that change the direction of refrigerant flow are sometimes located adjacent to the flow path. For example, a flow path that supplies refrigerant from the outside to the cooling unit is sometimes located near a bend that is positioned on the flow path that carries refrigerant discharged from the cooling unit to the outside.

[0009] During the manufacturing process, the elbow is joined to the cooling device by heat treatment such as brazing. However, if a flow path pipe is placed near the elbow, the flow path pipe may deform due to the heat when the elbow is joined to the cooling device.

[0010] Solution for solving the problem

[0011] This disclosure provides a technique for suppressing deformation of the flow path pipe caused by heat during the connection of elbows.

[0012] A cooling device according to one embodiment of this disclosure includes a cover, a first elbow, a second elbow, a first flow path pipe, and a second flow path pipe. The cover has a first opening and a second opening on a first surface for refrigerant flow. The first elbow is located on the first surface and connected to the first opening. The second elbow is located on the first surface and connected to the second opening. The first flow path pipe is located on the first surface and connected to the first elbow. The second flow path pipe is located on the first surface and connected to the second elbow. When viewed from a direction orthogonal to the first surface, the first flow path pipe extends in a straight line in a direction inclined relative to the flow direction of the second elbow near the second elbow, or the second flow path pipe bends away from the first elbow near the first elbow.

[0013] Invention Effects

[0014] According to this disclosure, deformation of the flow path pipe caused by heat during the connection of elbows can be suppressed. Attached Figure Description

[0015] Figure 1 This is a schematic top view of the cooling device according to the embodiment.

[0016] Figure 2 This is an enlarged top view showing the distance between the second elbow and the first flow path pipe in the embodiment.

[0017] Figure 3 This is a schematic perspective view of the cooling unit in the embodiment. Detailed Implementation

[0018] Hereinafter, the methods for implementing the cooling device and cooling system of this disclosure (hereinafter referred to as "Embodiments") will be described in detail with reference to the accompanying drawings. It should be noted that this disclosure is not limited to this embodiment. Furthermore, the various embodiments can be appropriately combined without causing contradictions in the processing content. In addition, in the following embodiments, the same reference numerals are used to label the same parts, and repeated descriptions are omitted.

[0019] Furthermore, for ease of explanation, the accompanying figures illustrate an orthogonal coordinate system, in which the X-axis, Y-axis, and Z-axis directions are defined as mutually orthogonal, with the Z-axis pointing vertically upwards. Additionally, the negative Y-axis direction is sometimes referred to as one side of the first direction, and the positive Y-axis direction as the other side of the first direction. Similarly, the negative X-axis direction is sometimes referred to as one side of the second direction, and the positive X-axis direction as the other side of the second direction.

[0020] (Implementation Method)

[0021] <Composition of the Cooling System>

[0022] First, refer to Figures 1 to 3 The configuration of the cooling device 100 in the embodiment will be described. Figure 1This is a schematic top view of the cooling device 100 according to the embodiment. Figure 2 This is an enlarged top view showing the distance between the second bend 30 and the first flow path pipe 40 in the embodiment. Figure 3 This is a schematic perspective view of the cooling unit 200 according to the embodiment.

[0023] like Figure 1 As shown, the cooling device 100 includes a cover 10, a first elbow 20, a second elbow 30, a first flow path pipe 40, and a second flow path pipe 50.

[0024] The cover 10 forms an internal space for the refrigerant to circulate. The refrigerant is, for example, a coolant. As a coolant, antifreeze such as an aqueous solution of ethylene glycol or propylene glycol, or pure water, can be used.

[0025] Cover 10 has a first surface 11 and a second surface 12 located on the opposite side of the first surface 11 (see reference). Figure 3 The first face 11 and the second face 12 can also be rectangular when viewed from above. Figure 1 In the example shown, the long sides of the first surface 11 and the second surface 12 extend along the Y-axis, and the short sides extend along the X-axis. The first surface 11 and the second surface 12 can also be flat surfaces, for example. A first opening 13 and a second opening 14 for refrigerant flow are located on the first surface 11. For example, the first opening 13 is an inlet for refrigerant to flow into the cover 10, and the second opening 14 is an outlet for refrigerant to flow out of the cover 10. In this case, the refrigerant flows from the first flow path 40 into the interior of the cover 10 via the first opening 13, flows through the interior of the cover 10, and then flows out through the second opening 14 to the second flow path 50.

[0026] The cover 10 can contact the heat-generating component on its second surface 12. In this case, the heat generated in the heat-generating component is transferred to the refrigerant via the second surface 12. The cover 10 can be formed of a material with relatively high thermal conductivity, such as copper or chromium copper. By using such a high thermal conductivity material to form the cover 10, the heat from the heat-generating component can be efficiently transferred to the refrigerant.

[0027] The first bend 20 is located on the first surface 11 and connected to the first opening 13. The first bend 20 changes the flow direction of the refrigerant flowing inside the first bend 20. Specifically, the first bend 20 changes the flow direction (XY plane direction) of the refrigerant flowing from the first flow pipe 40 to a direction toward the interior of the cover 10, more specifically toward the first opening 13 (negative Z-axis direction). The first bend 20 is, for example, formed in a cuboid shape, and is rectangular when viewed from a direction orthogonal to the first surface 11 (Z-axis direction). The first bend 20 has a first corner 21 located adjacent to the second flow pipe 50. The first corner 21 is the portion of the first bend 20 located closest to the second flow pipe 50. In other words, the portion of the first bend 20 other than the first corner 21 is farther away from the second flow pipe 50 than the first corner 21.

[0028] The second bend 30 is located on the first surface 11 and connected to the second opening 14. The second bend 30 changes the flow direction of the refrigerant flowing inside the second bend 30. Specifically, the second bend 30 changes the flow direction (positive Z-axis direction) of the refrigerant flowing out of the internal space of the cover 10 through the second opening 14 to the flow direction (XY plane direction) of the second flow pipe 50. The second bend 30 is, for example, formed in a cuboid shape, and is rectangular when viewed from a direction orthogonal to the first surface 11. The second bend 30 has a second corner 31 located adjacent to the first flow pipe 40. The second corner 31 is the portion of the second bend 30 located closest to the first flow pipe 40. In other words, the portion of the second bend 30 other than the second corner 31 is farther away from the first flow pipe 40 than the second corner 31.

[0029] The first elbow 20 and the second elbow 30 can be formed, for example, using stainless steel or chrome copper.

[0030] The first flow path 40 connects, for example, the second connector 82 and the first elbow 20. The first flow path 40 is formed, for example, using copper. The first flow path 40 is located on the first surface 11 and connected to the first elbow 20. When viewed from a direction orthogonal to the first surface 11, the first flow path 40 has a first straight portion 41 extending linearly in a direction inclined relative to the flow path direction A of the second elbow 30, near the position of the second elbow 30. In other words, the flow path direction A of the second elbow 30, i.e., the extension direction of the second elbow 30, is inclined relative to the extension direction of the first straight portion 41 of the first flow path 40. The angle B formed by the first straight portion 41 and the flow path direction A of the second elbow 30 in the first flow path 40 can, for example, be an acute angle of 15 degrees or more.

[0031] Specifically, the first flow path 40 has a first straight section 41, a third curved section 42, a second straight section 43, and a fourth curved section 44. The first straight section 41 extends along a second direction (X-axis direction) orthogonal to the first direction (Y-axis direction) on the other side of the first surface 11 in the first direction (positive Y-axis direction side). The third curved section 42 connects to the second side of the first straight section 41 in the second direction (positive X-axis direction side) and bends towards the first direction (negative Y-axis direction side). The second straight section 43 connects to the third curved section 42 in the first direction (negative Y-axis direction side) and extends in a straight line towards the first direction (negative Y-axis direction side). The fourth curved section 44 connects to the second straight section 43 in the first direction (negative Y-axis direction side) and bends towards the second direction (negative X-axis direction side).

[0032] The second flow path 50 is located on the first surface 11 and connects the second bend 30 and the third bend 83 (see reference). Figure 3 The second flow path 50 is formed, for example, using copper. The second flow path 50 has a second bend 53 that bends away from the first bend 20 at a position adjacent to the first bend 20.

[0033] Specifically, the second flow path 50 has a third straight portion 51 that extends in a straight line from a position adjacent to the first straight portion 41 of the first flow path 40 toward a first direction side (the negative Y-axis side) and a second direction side (the negative X-axis side). It should be noted that "extending toward the first and second directions" means "extending obliquely relative to the long and short sides of the first surface 11".

[0034] The second flow path 50 also has a first bend 52 and a second bend 53. The first bend 52 bends away from the first bend 20 at a position adjacent to the first bend 20. Specifically, the first bend 52 extends in a curved shape that bulges inward when viewed from the first bend 20, from a position adjacent to the first corner 21 of the first bend 20, toward one side of the first direction (the negative Y-axis side) and the other side of the second direction (the positive X-axis side).

[0035] The second curved portion 53 is connected to the third straight portion 51 on one side of the first direction (negative Y-axis direction), and has a curved shape that surrounds the first elbow 20 while approaching the first elbow 20 on the other side of the second direction (positive X-axis direction). Specifically, the second curved portion 53 extends from the end of the third straight portion 51, which is located on the other side of the first direction (positive Y-axis direction) and on one side of the second direction (negative X-axis direction) relative to the first elbow 20, toward the end of the first curved portion 52, which is located on one side of the first direction (negative Y-axis direction) and on one side of the second direction (negative X-axis direction) relative to the first elbow 20, in a curved shape that bulges outward when viewed from the first elbow 20. The second curved portion 53 is connected to the first curved portion 52 at a position adjacent to the first elbow 20.

[0036] By configuring it as described above, a piping configuration can be obtained where piping is connected from the side opposite to the first direction (positive Y-axis side) and the second direction side (negative X-axis side) relative to the cover 10, and refrigerant flows into the interior of the cover 10 from the side opposite to the first direction (negative Y-axis side) relative to the cover 10. This improves the piping operability of the flow path when it is desired that the region on the side opposite to the first direction (negative Y-axis side) of the interior space of the cover 10 be cooled more than the region on the side opposite to the first direction (positive Y-axis side).

[0037] Furthermore, by configuring it as described above, the piping workability of the flow path pipe when it is desired to discharge the refrigerant to the other side of the second direction (the positive X-axis direction side) can be improved.

[0038] When viewed from a direction orthogonal to the first surface 11, the first flow path 40 and the second flow path 50 may also have the aforementioned bends at positions coinciding with the cover 10. Specifically, they have a first bend 52, a second bend 53, a third bend 42, and a fourth bend 44.

[0039] Therefore, it is easy to implement piping that bends away from bends and piping that extends in a straight line at an angle relative to the flow direction of bends. Furthermore, piping can be easily implemented even when there are constraints on the piping outside the cooling device 100. In addition, the design freedom of the external parts of the cooling device 100 can be increased.

[0040] Furthermore, as described above, the second flow path 50 has a first bend 52 and a second bend 53. The first bend 52 bends away from the first bend 20 at a position adjacent to the first bend 20. The second bend 53 has a bend shape that surrounds the first bend 20 while being close to the first bend 20, and is connected to the first bend 52 at a position adjacent to the first bend 20.

[0041] Furthermore, it facilitates the avoidance of bends in the second flow path 50. In addition, since the first bend 52 and the second bend 53 loosen the flow path, the piping workability of the flow path is improved.

[0042] This embodiment shows an example where the second flow path 50 has multiple bends, but it is not limited to this; the first flow path 40 may also have multiple bends. Furthermore, both the first flow path 40 and the second flow path 50 may have multiple bends. That is, at least one of the first flow path 40 and the second flow path 50 may have multiple bends.

[0043] Therefore, it is easy to implement piping that bends away from bends and piping that extends in a straight line at an angle relative to the flow direction of bends. Furthermore, piping can be easily implemented even when there are constraints on the piping outside the cooling device 100. In addition, the design freedom of the external parts of the cooling device 100 can be increased.

[0044] The proximity distance between the first bend 20 and the second flow path pipe 50, and the proximity distance between the second bend 30 and the first flow path pipe 40, can also be less than the diameters of the first flow path pipe 40 and the second flow path pipe 50. Specifically, the distance L1 between the first bend 20 and the second flow path pipe 50 at the adjacent positions can also be less than the width L3 of the first flow path pipe 40 (refer to...). Figure 2 The width L4 of the second flow path 50. Furthermore, the distance L2 between the second bend 30 and the first flow path 40 at a location adjacent to the second bend 30 (refer to...). Figure 2 It can also be smaller than the width L3 of the first flow path tube 40 and the width L4 of the second flow path tube 50.

[0045] With this configuration, the closest distance between the first elbow 20 and the second flow path 50, and the closest distance between the second elbow 30 and the first flow path 40, is less than the width L3 of the first flow path 40 and the width L4 of the second flow path 50. This increases the flexibility in the configuration of the first elbow 20 and the second elbow 30. Furthermore, it increases the flexibility in the flow path design within the cooling device 100.

[0046] According to the cooling device 100 configured as described above, the area adjacent to the first flow path pipe 40 and the second elbow 30, and the area adjacent to the second flow path pipe 50 and the first elbow 20, can be reduced. Thus, for example, deformation of the second flow path pipe 50 adjacent to the first elbow 20 and deformation of the first flow path pipe 40 adjacent to the second elbow 30 caused by heat generated when the first elbow 20 and the second elbow 30 are joined by brazing or the like can be suppressed.

[0047] Furthermore, as described above, the first elbow 20 and the second elbow 30 are rectangular when viewed from a direction orthogonal to the first surface 11. In the cooling device 100, the first elbow 20 is not parallel to the second flow path pipe 50, and the second elbow 30 is not parallel to the first flow path pipe 40. Therefore, the areas adjacent to the first elbow 20 and the second flow path pipe 50, as well as the areas adjacent to the second elbow 30 and the first flow path pipe 40, can be reduced. As a result, for example, deformation of the second flow path pipe 50 adjacent to the first elbow 20 and deformation of the first flow path pipe 40 adjacent to the second elbow 30 caused by heat generated when the first elbow 20 and the second elbow 30 are joined by brazing or the like can be suppressed.

[0048] Furthermore, as described above, in the first elbow 20, the first corner portion 21 is disposed closest to the second flow path pipe 50, and in the second elbow 30, the second corner portion 31 is disposed closest to the first flow path pipe 40. This arrangement reduces the proximity of the first flow path pipe 40 to the second elbow 30, and the proximity of the second flow path pipe 50 to the first elbow 20. Therefore, for example, deformation of the second flow path pipe 50 adjacent to the first elbow 20 and deformation of the first flow path pipe 40 adjacent to the second elbow 30 caused by heat generated when joining the first elbow 20 and the second elbow 30 by brazing or the like can be suppressed.

[0049] Furthermore, as described above, the angle B formed by the first straight portion 41 of the first flow path pipe 40 and the flow path direction A of the second bend 30 is an acute angle of 15 degrees or more. By configuring it in this way, the area adjacent to the first flow path pipe 40 and the second bend 30 can be reduced. As a result, for example, deformation of the first flow path pipe 40 adjacent to the second bend 30 due to heat generated when joining the second bend 30 by brazing or the like can be suppressed.

[0050] <Composition of the cooling unit>

[0051] Next, refer to Figure 3 An example of the configuration of the cooling unit 200 in the embodiment will be described. For example... Figure 3 As shown, the cooling unit 200 includes the aforementioned cooling device 100, a first manifold 61, a second manifold 62, a third flow path pipe 71, and a fourth flow path pipe 72.

[0052] The cooling unit 200 includes multiple cooling devices 100. In this embodiment, the cooling unit 200 includes two cooling devices 100, but it is not particularly limited to this, and may include three or more cooling devices 100. The multiple cooling devices 100 are respectively connected to the heat-generating parts that serve as heat sources, and absorb heat from the heat-generating parts. In the cooling devices 100, the piping of the first flow path pipe 40 and the second flow path pipe 50 is symmetrical to each other in the second direction. For example, the cooling device 100 on the other side of the second direction (positive X-axis direction side) and the cooling device 100A on one side of the second direction (negative X-axis direction side) are symmetrically arranged in the second direction. When viewed from a direction orthogonal to the first surface 11, the other side of the second direction (positive X-axis direction side) of the third flow path pipe 71 may also be located between the cooling device 100 and the cooling device 100A. The first flow path pipe 40 and the second flow path pipe 50 of the cooling device 100 on the other side of the second direction (positive X-axis direction side) are symmetrical in the second direction to the first flow path pipe 40A and the second flow path pipe 50A of the cooling device 100A on the other side of the second direction (negative X-axis direction side).

[0053] Therefore, in the presence of multiple heat sources, the piping workability of the flow path pipe can be improved.

[0054] The first manifold 61, for example, connects the first connector 81 to the second connector 82 and the second connector 82A. Figure 3 As shown, the first manifold 61 can also be located on the other side (positive Y-axis direction) of the cooling device 100 and cooling device 100A in the first direction. In this configuration, the first direction side (negative Y-axis direction) of the first manifold 61 is connected to the first connector 81. Furthermore, the first direction side (negative Y-axis direction) of the first manifold 61 is connected to the second connector 82 and the second connector 82A on both sides (X-axis direction) of the first connector 81 in the second direction. When viewed from a direction orthogonal to the first surface 11, the first manifold 61 extends in a straight line along the second direction (X-axis direction).

[0055] Alternatively, the first manifold 61 may be located between the cooling device 100 and the cooling device 100A (not shown). In this configuration, one side of the first manifold 61 in the first direction (the negative Y-axis side) is connected to the first connector 81. Furthermore, the other side of the first manifold 61 in the first direction (the positive Y-axis side) is connected to the second connector 82 and the second connector 82A, respectively. When viewed from a direction orthogonal to the first surface 11, the first manifold 61 extends in a straight line along the first direction.

[0056] The second manifold 62, for example, connects the third elbow 83 and the third elbow 83A to the fourth elbow 84. The second manifold 62 is located on the first direction side (negative Y-axis side) of the cooling device 100 and the cooling device 100A. The first direction side (negative Y-axis side) of the upper surface of the second manifold 62 is connected to the fourth elbow 84. Furthermore, regarding the second manifold 62, on the upper surface of this second manifold 62, the third elbow 83A is connected to the other side of the first direction (positive Y-axis side) of the fourth elbow 84, and the third elbow 83 is connected to the other side of the first direction (positive Y-axis side) and the other side of the second direction (positive X-axis side) of the fourth elbow 84.

[0057] The first manifold 61 and the second manifold 62 can be formed, for example, by using copper or chromium copper.

[0058] The third flow path 71, for example, allows refrigerant supplied from a pump (not shown) to flow through the first manifold 61. The other side of the third flow path 71 in the first direction (positive Y-axis direction) is connected to the first connector 81. One side of the third flow path 71 in the first direction (negative Y-axis direction) is connected to the third connector 85. The inner diameter of the third flow path 71 may also be larger than the inner diameters of the first flow path 40 and the second flow path 50. The outer diameter of the third flow path 71 may also be larger than the outer diameters of the first flow path 40 and the second flow path 50.

[0059] The fourth flow path 72, for example, allows refrigerant supplied from the second manifold 62 to flow through. The other side of the fourth flow path 72 in the first direction (positive Y-axis direction) connects to the fourth elbow 84. One side of the fourth flow path 72 in the first direction (negative Y-axis direction) connects to the fourth connector 86. The inner diameter of the fourth flow path 72 may also be larger than the inner diameters of the first flow path 40 and the second flow path 50. The outer diameter of the fourth flow path 72 may also be larger than the outer diameters of the first flow path 40 and the second flow path 50.

[0060] The third flow path tube 71 and the fourth flow path tube 72 can also be formed, for example, using stainless steel.

[0061] The brazing process in the manufacturing of the cooling unit 200 is performed in three stages. The heating temperature in each stage is set to decrease in the order of the first stage, the second stage, and the third stage. This prevents the solder from melting in the previous stage in the subsequent stages.

[0062] In the first stage, the third flow path pipe 71 and the first connector 81 are brazed, and the fourth elbow 84 and the fourth flow path pipe 72 are brazed.

[0063] In the second stage, brazing is performed between the first connector 81 and the first manifold 61, and between the first manifold 61 and the second connector 82 and the second connector 82A. Furthermore, in the second stage, brazing is performed between the first elbow 20 and the cover 10, between the first elbow 20A and the cover 10A, between the cover 10 and the second elbow 30, and between the cover 10A and the second elbow 30A. Additionally, in the second stage, brazing is performed between the third elbow 83 and the third elbow 83A and the second manifold 62, and between the second manifold 62 and the fourth elbow 84.

[0064] In the third stage, the third connector 85 and the third flow path tube 71 are brazed. Additionally, in the third stage, the second connector 82 and the first flow path tube 40, the second connector 82A and the first flow path tube 40A, the first flow path tube 40 and the first elbow 20, and the first flow path tube 40A and the first elbow 20A are brazed. Furthermore, in the third stage, the second elbow 30 and the second flow path tube 50, the second elbow 30A and the second flow path tube 50A, the second flow path tube 50 and the third elbow 83, and the second flow path tube 50A and the third elbow 83A are brazed. Finally, in the third stage, the fourth flow path tube 72 and the fourth connector 86 are brazed.

[0065] As a heating method for the brazing process, vacuum brazing, diffusion bonding, continuous furnace heating, and IH (Induction Heating) heaters can be used.

[0066] It should be noted that this technology can also be configured in the following ways. (1)

[0068] A cooling device comprising:

[0069] The cover has a first opening and a second opening on its first side for refrigerant to flow through;

[0070] The first bend is located on the first face and is connected to the first opening;

[0071] The second bend is located on the first face and is connected to the second opening;

[0072] The first flow path pipe is located on the first face and connected to the first elbow; and

[0073] The second flow path pipe is located on the first surface and is connected to the second elbow.

[0074] When viewed from a direction orthogonal to the first surface, the first flow path extends in a straight line in a direction inclined relative to the flow path direction of the second bend near the second bend, or the second flow path bends away from the first bend near the first bend. (2)

[0076] According to the cooling device described in (1), the first bend and the second bend are rectangular when viewed from a direction orthogonal to the first surface. (3)

[0078] According to the cooling device described in (1) or (2), when viewed from a direction orthogonal to the first surface, the first flow path and the second flow path have bends at positions coinciding with the cover. (4)

[0080] According to the cooling device described in (3), at least one of the first flow path pipe and the second flow path pipe has a plurality of said bends. (5)

[0082] The cooling device according to any one of (1) to (4), wherein the second flow path pipe has:

[0083] The first bend, located near the first bend, bends away from the first bend; and

[0084] The second bend has a curved shape that surrounds the first bend while being close to the first bend, and is continuous with the first bend at a position adjacent to the first bend. (6)

[0086] The cooling device according to any one of (1) to (5) wherein the distance between the first elbow and the second flow pipe at the position adjacent to the first elbow and the second flow pipe, and the distance between the second elbow and the first flow pipe at the position adjacent to the second elbow and the first flow pipe are less than the width of the first flow pipe and the second flow pipe. (7)

[0088] According to any one of (2) to (6) of the cooling device, wherein the first elbow has a first corner located adjacent to the second flow path pipe,

[0089] The second elbow has a second corner located adjacent to the first flow path pipe.

[0090] In the first bend, the first corner is located closest to the second flow path pipe.

[0091] In the second bend, the second corner is located closest to the first flow path pipe. (8)

[0093] According to any one of (1) to (7) of the cooling device, wherein in the first flow path pipe, the portion of which extends in a straight line in a direction inclined relative to the flow path direction of the second bend at a position adjacent to the second bend forms an acute angle of 15 degrees or more with the flow path direction of the second bend. (9)

[0095] The cooling device according to any one of (1) to (8), wherein the first flow path pipe has:

[0096] The first straight section extends along a second direction orthogonal to the first direction on the other side of the first surface in the first direction;

[0097] The third curved portion is connected to the other side of the first straight portion in the second direction and bends toward one side in the first direction;

[0098] The second straight portion connects to one side of the third curved portion in the first direction and extends in a straight line along one side of the first direction; and

[0099] The fourth curved portion connects to the second straight portion on one side in the first direction and bends towards the second direction.

[0100] The second flow path has a third straight section that extends in a straight line from a position adjacent to the first straight section toward a first direction side and a second direction side. (10)

[0102] According to the cooling device described in (9), the second flow path pipe has:

[0103] The first bend, located near the first bend, bends away from the first bend; and

[0104] The second curved portion is connected to one side of the third straight portion in the first direction, and has a curved shape that surrounds the first bend while moving toward the other side in the second direction close to the first bend, and is continuous with the first curved portion at a position adjacent to the first bend. (11)

[0106] A cooling unit comprising a plurality of cooling devices according to any one of (1) to (10),

[0107] In the cooling device, the piping of the first flow path pipe and the second flow path pipe are symmetrical to each other in the second direction.

[0108] The embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. In fact, the above embodiments can be embodied in many forms. Furthermore, the above embodiments can be omitted, substituted, or modified in various ways without departing from the appended claims and their spirit.

[0109] Explanation of reference numerals in the attached figures:

[0110] 10: Cover

[0111] 11: First Page

[0112] 13: First Opening

[0113] 14: Second opening

[0114] 20: First bend

[0115] 21: First corner

[0116] 30: Second bend

[0117] 31: Second corner

[0118] 40: First flow tube

[0119] 41: First straight section

[0120] 42: Third bend

[0121] 43: Second straight section

[0122] 44: Fourth bend

[0123] 50: Second flow path pipe

[0124] 51: Third straight section

[0125] 52: First bend

[0126] 53: Second bend

[0127] 100: Cooling device

[0128] 200: Cooling unit

[0129] A: Flow path direction

[0130] B: Angle

[0131] L1: Distance

[0132] L2: Distance

[0133] L3: Width

[0134] L4: Width.

Claims

1. A cooling device, the cooling device comprising: The cover has a first opening and a second opening on its first side for refrigerant to flow through; The first bend is located on the first face and is connected to the first opening; The second bend is located on the first face and is connected to the second opening; The first flow path pipe is located on the first surface and is connected to the first elbow; and The second flow path pipe is located on the first surface and is connected to the second elbow. When viewed from a direction orthogonal to the first surface, the first flow path extends in a straight line in a direction inclined relative to the flow path direction of the second bend near the second bend, or the second flow path bends away from the first bend near the first bend.

2. The cooling device according to claim 1, wherein, The first elbow and the second elbow are rectangular when viewed from a direction orthogonal to the first surface.

3. The cooling device according to claim 1, wherein, When viewed from a direction orthogonal to the first surface, the first flow path and the second flow path have bends at positions coinciding with the cover.

4. The cooling device according to claim 3, wherein, At least one of the first flow path tube and the second flow path tube has a plurality of said bends.

5. The cooling device according to claim 1, wherein, The second flow path tube has: The first bend bends away from the first bend at a position adjacent to the first bend. and The second bend has a curved shape that surrounds the first bend while being close to the first bend, and is continuous with the first bend at a position adjacent to the first bend.

6. The cooling device according to claim 1, wherein, The distance between the first elbow and the second flow path at the position adjacent to the first elbow and the second flow path, and the distance between the second elbow and the first flow path at the position adjacent to the second elbow and the first flow path are less than the width of the first flow path and the second flow path.

7. The cooling device according to claim 2, wherein, The first elbow has a first corner located adjacent to the second flow path pipe. The second elbow has a second corner located adjacent to the first flow path pipe. In the first bend, the first corner is located closest to the second flow path pipe. In the second bend, the second corner is located closest to the first flow path pipe.

8. The cooling device according to claim 1, wherein, In the first flow path pipe, the portion extending in a straight line in a direction inclined relative to the flow path direction of the second bend at a position adjacent to the second bend forms an acute angle of 15 degrees or more with the flow path direction of the second bend.

9. The cooling device according to claim 1, wherein, The first flow path tube has: The first straight section extends along a second direction orthogonal to the first direction on the other side of the first surface in the first direction; The third curved portion is connected to the other side of the first straight portion in the second direction and bends toward one side in the first direction; The second straight portion is connected to one side of the third curved portion in the first direction and extends in a straight line along one side of the first direction. and The fourth curved portion connects to the second straight portion on one side in the first direction and bends towards the second direction. The second flow path has a third straight section that extends in a straight line from a position adjacent to the first straight section toward a first direction side and a second direction side.

10. The cooling device according to claim 9, wherein, The second flow path tube has: The first bend, located near the first bend, bends away from the first bend; and The second curved portion is connected to one side of the third straight portion in the first direction, and has a curved shape that surrounds the first bend while moving toward the other side in the second direction close to the first bend, and is continuous with the first curved portion at a position adjacent to the first bend.

11. A cooling unit comprising a plurality of cooling devices as described in claim 9 or 10. In the cooling device, the piping of the first flow path pipe and the second flow path pipe are symmetrical to each other in the second direction.

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