Cooling device and cooling unit including the same

Abstract

To provide a cooling device capable of improving assembling workability and improving a cooling effect by cooling air, and a cooling unit including the same.SOLUTION: The cooling device includes a first cold plate 11, a pair of manifolds 21 and 22, an inflow pipe 31, and an outflow pipe 32. The first cold plate has a lower surface thermally in contact with the heat-generating component, and includes a refrigerant flow path through which a refrigerant flows, and first refrigerant pipes 21a and 22a through which the refrigerant flows. At least one of the inflow pipe and the outflow pipe is connected to the first refrigerant pipe via an elbow 81, 82, 83, 84 disposed on an upper surface or a lower surface of the manifold.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cooling device and a cooling unit including the same. [Background technology]

[0002] A conventional cooling device includes a cold plate, a pair of manifolds, an inlet pipe, and an outlet pipe. The cold plate has a bottom surface that is in thermal contact with a heat-generating component and has a refrigerant flow path through which a refrigerant flows. The pair of manifolds are arranged opposite each other with the cold plate in between. The inlet pipe extends from one manifold to the inlet of the cold plate and directs the refrigerant toward the cold plate. The outlet pipe directs the refrigerant that has flowed out from the outlet of the cold plate toward the other manifold. The refrigerant pipe extends in a direction that intersects with the direction in which the pair of manifolds face each other (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Taiwan Patent Application Publication No. 202304283 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional cooling devices, assembly workability can be reduced when connecting the inlet pipe and the manifold or when connecting the outlet pipe and the manifold. Furthermore, when cooling air is circulated along the inlet and outlet pipes, heat can be dissipated from the heat-generating components and components disposed around the heat-generating components. However, the cooling air can collide with the manifold, reducing the cooling effect of the cooling air.

[0005] An object of the present invention is to provide a cooling device that can improve assembly workability and the cooling effect of cooling air, and a cooling unit including the same. [Means for solving the problem]

[0006] An exemplary cooling device of the present invention includes a first cold plate, a pair of manifolds, an inlet pipe, and an outlet pipe. The first cold plate is in thermal contact with a heat-generating component on its underside and has a refrigerant flow path through which a refrigerant flows. The pair of manifolds are arranged opposite each other across the cold plate and have a first refrigerant pipe through which the refrigerant flows. The inlet pipe extends from one manifold to an inlet of the first cold plate and allows the refrigerant to flow toward the first cold plate. The outlet pipe extends from an outlet of the first cold plate to the other manifold and allows the refrigerant to flow toward the other manifold. The first refrigerant pipe extends in a direction intersecting the direction in which the pair of manifolds face each other. At least one of the inlet pipe and the outlet pipe is connected to the first refrigerant pipe via an elbow arranged on the upper or lower surface of the manifold. [Effects of the Invention]

[0007] According to the exemplary embodiment of the present invention, it is possible to provide a cooling device that can improve the assembly workability and the cooling effect of the cooling air. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a cooling device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the cooling device according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view of the cooling device according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a side view of the cooling device according to the first embodiment of the present invention. [Figure 5] FIG. 5 is a perspective view of a cooling unit according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a top view of a cooling device according to a third embodiment of the present invention. [Figure 7]FIG. 7 is a top view of a cooling device according to a third embodiment of the present invention. [Figure 8] FIG. 8 is an enlarged vertical cross-sectional view schematically showing an elbow of a cooling device according to a third embodiment of the present invention. [Figure 9] FIG. 9 is an enlarged vertical cross-sectional view schematically showing an elbow of a cooling device according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a side view of a cooling device according to a third embodiment of the present invention. [Figure 11] FIG. 11 is an enlarged vertical cross-sectional view schematically showing a manifold of a cooling device according to a third embodiment of the present invention. [Figure 12] FIG. 12 is an enlarged perspective view of a part of a cooling device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In this application, the direction in which the bracket 50 is arranged relative to the cold plate 11 will be referred to as "upper," and the opposite side of the direction in which the bracket 50 is arranged will be referred to as "lower." In addition, in this application, the direction in which the bracket 50 is arranged relative to the cold plate 11 will be referred to as the "vertical direction," and the direction perpendicular to the "vertical direction" will be referred to as the "horizontal direction," and the shape and positional relationship of each part will be described.

[0010] The direction in which the pair of manifolds 21, 22 of the cooling device 1 face each other is referred to as the facing direction (X1-X2), and the direction intersecting the facing direction (X1-X2) is referred to as the intersecting direction (Y1-Y2). In this embodiment, the vertical direction (Z1-Z2) is perpendicular to the facing direction (X1-X2) and the intersecting direction (Y1-Y2). However, this definition of the vertical direction and the horizontal direction is given merely for the sake of convenience of explanation, and does not limit the orientation of the cooling device 1 according to the present invention during manufacture or use.

[0011] In the present application, the term "parallel direction" includes a direction that is substantially parallel to the other, and the term "perpendicular direction" includes a direction that is substantially perpendicular to the other.

[0012] First Embodiment (1. Cooling device configuration) A cooling device according to an exemplary embodiment of the present invention will now be described. Figures 1, 2, and 3 are perspective views of a cooling device 1 according to an embodiment of the present invention. Figure 2 shows the cooling device from below, and Figure 3 shows the state in which the top wall portion 51 of the bracket 50 is omitted.

[0013] The cooling device 1 includes a plurality of cold plates (first cold plates) 11, a pair of manifolds 21 and 22, an inlet pipe 31, an outlet pipe 32, a supply pipe 41, an outlet pipe 42, and a bracket 50.

[0014] A plurality of cold plates 11 are connected in parallel to a pair of manifolds 21, 22 via inlet pipes 31 and outlet pipes 32. The manifold 21 is connected to a supply pipe 41, and the manifold 22 is connected to a discharge pipe 42. The supply pipe 41 and the discharge pipe 42 are connected to a pump (not shown).

[0015] When the pump is driven, the refrigerant is supplied from the supply pipe 41 to the manifold 21. The refrigerant supplied to the manifold 21 branches into each of the inlet pipes 31.

[0016] The branched refrigerant flows into each cold plate 11. The refrigerant that flows into each cold plate 11 flows out into the manifold 22 via the outlet pipe 32. The refrigerant that flows out into the manifold 22 returns to the pump via the discharge pipe 42. This causes the refrigerant to circulate within the cooling device 1, and the lower surface of the cold plate 11 is cooled by the refrigerant.

[0017] (1-1. Detailed structure of the cold plate) The cold plate 11 has a lower surface that is in thermal contact with a heat-generating component (not shown), and has a refrigerant flow path (first refrigerant flow path) 11a therein through which a refrigerant flows (see FIG. 2).

[0018] In this embodiment, a plurality of cold plates 11 are arranged side by side in the intersecting direction (Y1-Y2) and connected in parallel via a pair of manifolds 21, 22. This allows for efficient cooling of a plurality of heat-generating components by arranging cold plates 11 corresponding to the respective components. Note that, in this embodiment, two cold plates 11 are arranged side by side in the intersecting direction (Y1-Y2), but one or three or more cold plates may be arranged.

[0019] The cold plate 11 is made of a metal with high thermal conductivity, such as copper or aluminum. The cold plate 11 has a bottom wall 111 and a lid 110. The bottom wall 111 has a recess 111a recessed downward (Z2) and a flange 111b extending horizontally from the upper periphery of the recess 111a (see FIG. 2). The lid 110 covers the opening of the recess 111a and is joined to the flange 111b. A heat-generating component comes into contact with the underside of the recess 111a.

[0020] A refrigerant flow path (first refrigerant flow path) 11a is formed in a space surrounded by the recess 111a of the bottom wall 111 and the lid 110, and a plurality of blades (not shown) are arranged in the refrigerant flow path (first refrigerant flow path) 11a. The blades are formed, for example, by cutting the upper surface of the bottom wall 111. This improves thermal conductivity from the bottom wall 111 to the blades.

[0021] The cover 110 is formed with an inlet 110a and an outlet 110b that penetrate in the vertical direction (Z1-Z2). The inlet 110a and the outlet 110b face the recess 111a in the vertical direction (Z1-Z2). A refrigerant flow path (first refrigerant flow path) 11a is formed inside the recess 111a.

[0022] In this embodiment, the cold plate 11 has a rectangular shape when viewed from above, but this is not limiting. For example, the cold plate 11 may have a polygonal shape having multiple corners or a circular shape when viewed from above.

[0023] (1-2. Detailed configuration of the manifold) The pair of manifolds 21, 22 are arranged opposite each other with the cold plate 11 in between, and each have refrigerant pipes (first refrigerant pipes) 21a, 22a through which a refrigerant flows. In this embodiment, the manifolds 21, 22 are formed in a rectangular parallelepiped shape, and the refrigerant pipes 21a, 22a extend in the intersecting direction (Y1-Y2). The refrigerant pipes 21a, 22a extend parallel to each other, and the opposing direction (X1-X2) and the intersecting direction (Y1-Y2) are perpendicular to each other. This prevents the cooling device 1 from becoming too large.

[0024] The inlet pipe 31 extends from one manifold 21 to the inlet 110a of the cold plate 11, and allows the refrigerant to flow into the cold plate 11. The outlet pipe 32 extends from the outlet 110b of the cold plate 11 to the other manifold 22, and allows the refrigerant to flow out toward the other manifold 22.

[0025] In this embodiment, the inlet pipe 31 and the outlet pipe 32 extend parallel to each other in the opposing direction (X1-X2), and are perpendicular to the extending direction of the refrigerant pipes 21a and 22a. The inlet pipe 31 and the outflow pipe 32 do not have to extend linearly over the entire length in the opposing direction (X1-X2). For example, the inlet pipe 31 and the outflow pipe 32 may extend parallel to each other in the opposing direction (X1-X2) while being partially bent.

[0026] The inlet pipe 31 is connected at its end on one side (X1) in the opposing direction to the refrigerant pipe 21a via an elbow 81 arranged on the upper surface of the manifold 21. The inlet pipe 31 is connected at its end on the other side (X2) in the opposing direction to the refrigerant flow path 11a via an elbow 83 arranged on the upper surface of the lid 110 of the cold plate 11.

[0027] The outlet pipe 32, at its end on the other side (X2) in the opposing direction, is connected to the refrigerant pipe 22a via an elbow 82 arranged on the upper surface of the manifold 22. The outlet pipe 32, at its end on one side (X1) in the opposing direction, is connected to the refrigerant flow path 11a via an elbow 84 arranged on the upper surface of the lid 110 of the cold plate 11.

[0028] Elbow 81 changes the flow direction of the refrigerant to connect inlet pipe 31 and refrigerant pipe 21a. Elbow 82 changes the flow direction of the refrigerant to connect outlet pipe 32 and refrigerant pipe 22a. Elbow 81 changes the flow direction of the refrigerant flowing in the intersecting direction (Y1-Y2) to the opposing direction (X1-X2). Elbow 82 changes the flow direction of the refrigerant flowing in the opposing direction (X1-X2) to the intersecting direction (Y1-Y2).

[0029] By arranging the elbows 81 and 82 on the upper surfaces of the manifolds 21 and 22, the working space is increased, and the inlet pipe 31 and the refrigerant pipe 21a can be easily connected. Also, the outlet pipe 32 and the refrigerant pipe 22a can be easily connected. This improves the workability of assembling the cooling device 1.

[0030] Furthermore, when cooling air is circulated in the opposing direction (X1-X2) along the inlet pipe 31 and the outlet pipe 32, heat can be dissipated from the heat-generating components and components arranged around the heat-generating components. At this time, the cooling air circulating in the opposing direction (X1-X2) can easily pass over the upper surfaces of the manifolds 21, 22 without colliding with the manifolds 21, 22. This improves the cooling effect of the cooling air. Furthermore, the cooling air that has passed over the upper surfaces of the manifolds 21, 22 can also improve the cooling effect on the components arranged around the cooling device 1.

[0031] Elbow 83 connects inlet pipe 31 and refrigerant flow path 11a. Elbow 84 connects outlet pipe 32 and refrigerant flow path 11a.

[0032] By arranging elbows 83 and 84 on the upper surface of lid portion 110 of cold plate 11, the working space is increased, and refrigerant flow path 11a can be easily connected to inlet pipe 31. Also, refrigerant flow path 11a can be easily connected to outlet pipe 32. This further improves the workability of assembling cooling device 1.

[0033] The supply pipe 41 supplies the refrigerant to one of the manifolds 21. The discharge pipe 42 discharges the refrigerant from the other of the manifolds 22. In this embodiment, the supply pipe 41 is connected to the refrigerant pipe 21a via an elbow 85 arranged on the upper surface of the manifold 21. On the other hand, the discharge pipe 42 is connected to the side surface of the manifold 22 on the other side (X2) in the opposing direction. The discharge pipe 42 may also be connected to the upper surface of the manifold 22 via an elbow. In other words, it is preferable that at least one of the supply pipe 41 and the discharge pipe 42 is connected to the refrigerant pipes 21a, 22a via an elbow 85 arranged on the upper surfaces of the manifolds 21, 22.

[0034] By arranging the elbow 85 on the upper surface of the manifold 21, the working space is increased and the supply pipe 41 and the refrigerant pipe 21a can be easily connected, thereby further improving the workability of assembling the cooling device 1.

[0035] In this embodiment, the supply pipe 41 and the discharge pipe 42 are drawn out to the other side in the opposing direction (the same side X2 in the opposing direction), and the supply pipe 41 is connected to the refrigerant pipe 21a at an end on one side (Y1) in the intersecting direction of the manifold 21. Here, the manifold 21 is disposed on the opposite side to the drawing direction (X2) of the supply pipe 41 and the discharge pipe 42.

[0036] When the supply pipe 41 and the discharge pipe 42 are drawn out to one side (X1) in the opposing direction, the discharge pipe 42 is connected to the refrigerant pipe 22a at an end on the other side (Y2) in the intersecting direction of the manifold 22. That is, the supply pipe 41 and the discharge pipe 42 are drawn out to the same side in the opposing direction (X1-X2), and one of the supply pipe 41 and the discharge pipe 42 is connected to the refrigerant pipes 21a, 22a at an end of the manifolds 21, 22 in the intersecting direction (Y1-Y2) that is arranged on the opposite side from the drawing direction of the supply pipe 41 and the discharge pipe 42.

[0037] As a result, even if the inlet pipe 31 and the outlet pipe 32 are first connected to the manifolds 21 and 22, respectively, the supply pipe 41 or the discharge pipe 42, which is connected later, can be easily connected to the refrigerant pipe 21a or the refrigerant pipe 22a. On the other hand, even if the supply pipe 41 or the discharge pipe 42 is first connected to the manifolds 21 and 22, respectively, the inlet pipe 31 and the outlet pipe 32, which is connected later, can be easily connected to the refrigerant pipe 21a or the refrigerant pipe 22a. Therefore, the assembly workability of the cooling device 1 is further improved.

[0038] In this embodiment, the end of the manifold 21 arranged on the opposite side (X1) from the drawing direction in the intersecting direction (Y1) protrudes further in the intersecting direction (Y1) than the end of the manifold 22 arranged on the drawing direction side (X2) in the intersecting direction (Y1). This allows the supply pipe 41 to be drawn out in the opposing direction (X1-X2) without coming into contact with the end of the manifold 22 arranged on the drawing direction side (X2) in the intersecting direction (Y1). This further prevents the cooling device 1 from becoming larger.

[0039] When the supply pipe 41 and the discharge pipe 42 are drawn out to one side (X1) in the opposing direction, it is preferable that the end in the intersecting direction (Y2) of the manifold 22 arranged on the side opposite to the drawing direction (X2) protrudes in the intersecting direction (Y2) further than the end in the intersecting direction (Y2) of the manifold 21 arranged on the drawing direction side (X1). This allows the discharge pipe 42 to be drawn out in the opposing direction (X1-X2) without coming into contact with the end in the intersecting direction (Y1) of the manifold 21 arranged on the drawing direction side (X1).

[0040] (1-3. Detailed structure of the bracket) 4 is a side view of the cooling device 1. The bracket 50 protects the cold plate 11. The bracket 50 has a top wall portion 51 and legs 52. The top wall portion 51 is a plate-shaped metal member that covers the cold plate 11 from above (Z1). The legs 52 extend downward (Z2) from the outer periphery of the top wall portion 51 and are positioned outward in the intersecting direction (Y1-Y2) than the manifolds 21 and 22. The manifolds 21 and 22 are fixed to the legs 52.

[0041] In this embodiment, the top wall portion 51 is formed in a rectangular shape when viewed from above, and the leg portions 52 are provided at four corners of the top wall portion 51. The leg portions 52 are fixed to the outer surfaces of the manifolds 21, 22 in the intersecting direction (Y1-Y2).

[0042] Furthermore, in a top view, the ceiling wall portion 51 at least partially overlaps the elbows 81, 82 arranged on the upper surfaces of the manifolds 21, 22. As a result, the elbows 81, 82 are covered and protected by the ceiling wall portion 51.

[0043] Fixing the bracket 50 to the manifolds 21 and 22 allows the cooling device 1 to be easily integrated. At this time, the positioning of the manifolds 21 and 22 becomes easy, further improving the assembly efficiency of the cooling device 1. Furthermore, by providing the legs 52, a gap is formed between the top wall portion 51 and the manifolds 21 and 22. This makes it easier for the cooling air flowing through the gap between the top wall portion 51 and the cold plate 11 in the opposing direction (X1-X2) to pass through the gap between the top wall portion 51 and the manifolds 21 and 22. This further improves the cooling effect of the cooling air.

[0044] Furthermore, the gap between the top wall portion 51 and the manifolds 21, 22 in the vertical direction (Z1-Z2) is preferably larger than the gap between the manifolds 21, 22 and the cover portion 110 of the cold plate 11 in the vertical direction (Z1-Z2). This increases the amount of cooling air passing through the gap between the top wall portion 51 and the manifolds 21, 22. This further improves the cooling effect of the cooling air. Furthermore, by providing a large gap between the top wall portion 51 and the manifolds 21, 22, sufficient installation space can be secured for elbows disposed on the upper surfaces of the manifolds. This further improves the ease of assembly of the cooling device 1.

[0045] In this embodiment, the lower ends of the manifolds 21 and 22 are located below (Z2) the upper end of the cold plate 11 and above (Z1) the lower end of the cold plate 11. Note that the lower ends of the manifolds 21 and 22 may also be located above (Z1) the upper end of the cold plate 11.

[0046] This allows the cooling airflow flowing through the gap between the top wall portion 51 and the cold plate 11 in the opposing direction (X1-X2) to easily pass under the manifolds 21 and 22. This further improves the cooling effect of the cooling airflow.

[0047] Second Embodiment Next, a second embodiment of the present invention will be described. Fig. 5 is a perspective view of a cooling unit 200 of the second embodiment, showing the state in which the top wall portion 51 of the bracket 50 is omitted. For ease of explanation, the same parts as those of the cooling device 1 of the first embodiment shown in Figs. 1 to 4 described above are given the same reference numerals. The cooling unit 200 of the second embodiment is configured by arranging the cooling device 1 and the cooling device 201 in the intersecting direction (Y1-Y2). The other parts are the same as those of the first embodiment.

[0048] The cooling device 201 includes a plurality of cold plates 211, a pair of manifolds 221, 222, an inlet pipe 231, an outlet pipe 232, a supply pipe 241, an outlet pipe 242, and a bracket 50.

[0049] The plurality of cold plates 211 are connected in parallel to a pair of manifolds 221, 222 via inlet pipes 231 and outlet pipes 232. The manifold 221 is connected to a supply pipe 241, and the manifold 222 is connected to a discharge pipe 242.

[0050] When the pump is driven, the refrigerant is supplied from the supply pipe 241 to the manifold 221. The refrigerant supplied to the manifold 221 branches into each of the inlet pipes 231.

[0051] The branched refrigerant flows into each cold plate 211. The refrigerant that flows into each cold plate 211 flows out into the manifold 222 via the outlet pipe 232. The refrigerant that flows out into the manifold 222 returns to the pump via the discharge pipe 242.

[0052] The manifold 21 connected to the inlet pipe 231 and the manifold 222 connected to the outlet pipe 232 are adjacent to each other in the intersecting direction (Y1-Y2). Also, the manifold 221 connected to the inlet pipe 231 and the manifold 22 connected to the outlet pipe 32 are adjacent to each other in the intersecting direction (Y1-Y2).

[0053] Heat exchange occurs between the manifold 21 and the manifold 222 that are adjacent in the intersecting direction (Y1-Y2). Heat exchange also occurs between the manifold 22 and the manifold 221 that are adjacent in the intersecting direction (Y1-Y2). This reduces the cooling effect of the entire cooling unit 200 from being biased in one of the opposing directions (X1-X2).

[0054] In this embodiment, the bracket 50 is omitted, but it is preferable that the top wall portion 51 covers the cold plate 11 and the cold plate 211 from above (Z1) to integrate the cooling device 1 and the cooling device 201.

[0055] Third Embodiment Next, a third embodiment of the present invention will be described. FIGS. 6 and 7 are top views of a cooling device 301 according to the third embodiment, with FIG. 7 showing the cooling device 301 without the top wall 51 of the bracket 50. For ease of explanation, the same components as those in the cooling device 1 according to the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals. In the cooling device 301 according to the third embodiment, a plurality of cold plates (first cold plates) 311 are arranged side by side between a pair of manifolds 21 and 22. An inlet pipe 331 extends from one manifold 21, branches off, and is connected to each of the inlets 110a of the plurality of cold plates 311. An outlet pipe 332 extends from the other manifold 22, branches off, and is connected to each of the outlets 110b of the plurality of cold plates 311.

[0056] In this embodiment, two cold plates (first cold plates) 311 are arranged side by side in the opposing direction (X1-X2) to form a cold plate group 311A. In the cold plate group 311A, the cold plates (first cold plates) 311 are connected in parallel. In addition, two cold plates in the cold plate group 311A ​​are arranged side by side in the intersecting direction (Y1-Y2) and connected in parallel via a pair of manifolds 21 and 22.

[0057] This allows the cold plates 311 to be arranged corresponding to the plurality of heat generating components aligned in the opposing direction (X1-X2), thereby allowing the plurality of heat generating components to be cooled more efficiently.

[0058] In this embodiment, two cold plates (first cold plates) 311 are connected in parallel in the cold plate group 311A, but three or more may be connected in parallel. Also, in this embodiment, two cold plates are connected in parallel in the cold plate group 311A, but three or more may be connected in parallel. Also, only one cold plate group 311A ​​may be disposed between the pair of manifolds 21, 22.

[0059] In this embodiment, the inlet pipe 331 branches off at an elbow 384B located on the upper surface of the lid 110 of the cold plate (first cold plate) 311 located on the upstream side X1. The outlet pipe 332 branches off at an elbow 383A located on the upper surface of the lid 110 of the cold plate (first cold plate) 311 located on the downstream side X2. That is, the inlet pipe 331 or the outlet pipe 332 branches off at the elbows 383A, 384B located on the upper surface of one cold plate (first cold plate) 311.

[0060] By arranging elbows 383A and 384B on the upper surface of lid 110 of cold plate 311, the working space is increased, and refrigerant flow path (first refrigerant flow path) 11a can be easily connected to inlet pipe 331. Also, refrigerant flow path (first refrigerant flow path) 11a can be easily connected to outlet pipe 332. This further improves the workability of assembling cooling device 301.

[0061] Figure 8 is an enlarged schematic longitudinal cross-sectional view of elbow 384B. In Figure 8, arrows indicate the flow of refrigerant. Elbow 384B connects inlet pipe 331 and refrigerant flow path 11a. More specifically, elbow 384B is a T-pipe, and both ends of elbow 384B in the opposing direction (X1-X2) are connected to inlet pipe 331. In addition, the lower end of elbow 384B is connected to inlet 110a of cold plate 311 located on the upstream side X1.

[0062] Elbow 384A is an L-shaped pipe, and its end on the upstream side X1 is connected to inlet pipe 331 (see FIG. 7). The lower end of elbow 384A is connected to inlet 110a of cold plate 311 arranged on the downstream side X2. As a result, part of the refrigerant flowing from refrigerant pipe 21a of manifold 21 toward cold plate 311 arranged on the downstream side X2 branches off at elbow 384B and flows into refrigerant flow path 11a from inlet 110a.

[0063] Figure 9 is an enlarged schematic longitudinal cross-sectional view of elbow 383A. In Figure 9, arrows indicate the flow of refrigerant. Elbow 383A connects outflow pipe 332 and refrigerant flow path 11a. More specifically, elbow 383A is a T-pipe, and both ends of elbow 383A in the opposing direction (X1-X2) are connected to outflow pipe 332. In addition, the lower end of elbow 383A is connected to outlet 110b of cold plate 311 located on the downstream side X2.

[0064] Elbow 383B is an L-shaped pipe, and its end on the downstream side X2 is connected to outflow pipe 332 (see FIG. 7). In addition, the lower end of elbow 383B is connected to outlet 110b of cold plate 311 arranged on the upstream side X1. As a result, the refrigerant flowing out from outlet 110b of cold plate 311 arranged on the upstream side X1 merges with the refrigerant flowing out from outlet 110b of cold plate 311 arranged on the downstream side X2 and flows toward refrigerant pipe 22a of manifold 22.

[0065] In this embodiment, the inlet pipe 331 and the outlet pipe 332 are made of the same piping material and are composed of an inner diameter portion 33a and an outer diameter portion 33b. The inner diameter portion 33a is cylindrical and forms a refrigerant flow path. The outer diameter portion 33b is cylindrical and covers and protects the inner diameter portion 33a. The inner diameter portion 33a is made of a resin with a lower water content than the outer diameter portion 33b. Furthermore, the outer diameter portion 33b is made of a resin with a higher bending stress than the inner diameter portion 33a.

[0066] For example, polypropylene resin with low water absorption is preferably used for the inner diameter portion 33a. By using a resin with low water absorption for the inner diameter portion 33a, refrigerant leakage can be prevented. Furthermore, for example, nylon (nylon 66) with high bending stress is preferably used for the outer diameter portion 33b. By using a resin with high bending stress for the outer diameter portion 33b, damage to the inlet pipe 331 and the outlet pipe 332 can be reduced even when the inlet pipe 331 and the outlet pipe 332 are bent and arranged inside the cooling device 301. This makes it easier to route the inlet pipe 331 and the outlet pipe 332, further improving the assembly workability of the cooling device 301.

[0067] Furthermore, it is preferable that the linear expansion coefficient of the resin constituting the inner diameter portion 33a is substantially the same as that of the resin constituting the outer diameter portion 33b. This prevents the inlet pipe 331 and the outlet pipe 332 from being deformed by the heat of the refrigerant flowing through them when the cooling device 301 is operating. This allows the refrigerant to flow smoothly, reducing the driving power of the cooling device 301.

[0068] Furthermore, the cross-sectional area S1a of the flow path of inlet pipe 331 arranged upstream of elbow (branch point) 384B is preferably larger than the cross-sectional area S1b of the flow path of inlet pipe 331 arranged downstream of elbow (branch point) 384B (see FIG. 8). This increases the amount of refrigerant flowing through inlet pipe 331 before branching, allowing the refrigerant to flow smoothly. Furthermore, the cross-sectional area S2b of the flow path of outlet pipe 332 arranged downstream of elbow (branch point) 383A is preferably larger than the cross-sectional area S2a of the flow path of outlet pipe 332 arranged upstream of elbow (branch point) 383A. This increases the amount of refrigerant flowing through outlet pipe 332 after merging, allowing the refrigerant to flow smoothly.

[0069] Further, inlet pipe 331 and outlet pipe 332 are provided with bands 34 that fasten and fix their outer peripheral surfaces to elbows 81, 383A, 383B, 384A, 384B, 386, and connector 382. By providing bands 34, inlet pipe 331 and outlet pipe 332 are prevented from coming loose from elbows 81, 383A, 383B, 384A, 384B, 386, and connector 382, ​​and refrigerant leakage can be suppressed. Note that bands 34 may be provided on only one of inlet pipe 331 and outflow pipe 332.

[0070] Additionally, the top wall 51 has an opening 51a that opens facing the band 34 in the up-down direction (Z1-Z2). This prevents contact between the band 34 and the top wall 51, and prevents poor connection between the inlet pipe 331 and the elbows 384A, 384B or between the outlet pipe 332 and the elbows 383A, 383B.

[0071] In addition, in this embodiment, the inlet pipe 331 is connected to the refrigerant pipe (first refrigerant pipe) 21a via elbows 81, 386 arranged on the upper surface of the manifold 21, and the outlet pipe 332 is connected to the refrigerant pipe (first refrigerant pipe) 22a via a connector 382 arranged on the side of the manifold 22.

[0072] Connector 382 changes the flow direction of the refrigerant flowing in the opposing direction (X1-X2) to the intersecting direction (Y1-Y2). By connecting outflow pipe 332 via connector 382 arranged on the side surface of manifold 22, the cooling air flowing in the opposing direction (X1-X2) passes smoothly over the upper surface of manifold 22. This can further improve the cooling effect on components arranged around cooling device 301.

[0073] Alternatively, the outflow pipe 332 may be connected to the refrigerant pipe (first refrigerant pipe) 22a via an elbow arranged on the upper surface of the manifold 22, and the inflow pipe 331 may be connected to the refrigerant pipe (first refrigerant pipe) 21a via a connector arranged on the side surface of the manifold 21. Alternatively, elbows 81, 386 may be arranged on the lower surface of the manifold 21 to connect the inflow pipe 331 and the refrigerant pipe 21a.

[0074] In this embodiment, elbow 386 disposed on the upper surface of manifold 21 has protruding portion 386b and extending portion 386a (see FIG. 7). Protruding portion 386b protrudes in direction X2 closer to the opposing cold plate (first cold plate) 311 than the periphery of manifold 21. This ensures that the space adjacent to protruding portion 386b in the intersecting direction (Y1-Y2) can be used as a screw fastening space. This allows screws 385a to be easily fastened without being obstructed by inlet pipe 331, further improving the workability of assembling cooling device 301.

[0075] Further, the extending portion 386a extends in the direction X1 away from the cold plate (first cold plate) 311 from the center of the opposing direction (X1-X2) of the manifold 21. This improves the cantilever support strength of the elbow 386.

[0076] When an elbow is disposed on the upper or lower surface of the manifold 22, the elbow disposed on the manifold 22 may be provided with a protruding portion 386b and an extending portion 386a.

[0077] Fig. 10 is a side view of cooling device 301, and Fig. 11 is an enlarged vertical cross-sectional view schematically showing manifold 21. In this embodiment, cooling device 301 further includes a cold plate (second cold plate) 312 arranged below manifold 21. The cold plate (second cold plate) 312 has a lower surface that is in thermal contact with the heat-generating component. Cold plate (second cold plate) 312 also has second refrigerant flow path 312a that communicates with refrigerant pipe (first refrigerant pipe) 21a and through which refrigerant flows.

[0078] A cold plate (second cold plate) 313 is disposed below the manifold 22. The cold plate 313 has a second refrigerant flow path 313a that communicates with the refrigerant pipe (first refrigerant pipe) 22a and through which the refrigerant flows.

[0079] By providing the cold plates (second cold plates) 312 and 313, the heat-generating components disposed below the manifolds 21 and 22 can be cooled efficiently.

[0080] More specifically, the cold plate 312 is made of a metal with high thermal conductivity, such as copper or aluminum. The cold plate 312 has a bottom wall 3111 and a lid 3110. The bottom wall 3111 has a recess 3111a recessed downward (Z2) and a flange 3111b extending horizontally from the upper periphery of the recess 3111a. The lid 3110 covers the opening of the recess 3111a and is joined to the flange 3111b. A heat-generating component comes into contact with the underside of the recess 3111a.

[0081] A second refrigerant flow path 312a is formed in a space surrounded by the recess 3111a of the bottom wall 3111 and the lid 3110, and a plurality of blades (not shown) are arranged in the second refrigerant flow path 312a. The blades are formed, for example, by cutting the upper surface of the bottom wall 3111. This improves thermal conductivity from the bottom wall 3111 to the blades.

[0082] A through-hole 3110a that penetrates in the vertical direction (Z1-Z2) is formed in the cover 3110. In this embodiment, the refrigerant pipe (first refrigerant pipe) 21a and the second refrigerant flow path 312a communicate with each other via the through-hole 3110a. This allows the refrigerant to flow through the second refrigerant flow path 312a in the cross direction (Y1-Y2).

[0083] In this embodiment, cold plate 312 has a rectangular shape when viewed from above, but this is not limiting. For example, cold plate 312 may have a polygonal shape with multiple corners or a circular shape when viewed from above. Cold plate 313 also has a structure similar to that of cold plate 312, and the refrigerant flows through second refrigerant flow passage 313a in the intersecting direction (Y1-Y2).

[0084] 12 is an enlarged perspective view of a portion of the cold plate 311. The cold plate (first cold plate) 311 has an inclined surface 311a. The upper end of the inclined surface 311a, which faces the manifold 21 in the facing direction (X1-X2), is inclined in the direction X2 away from the manifold 21 in the facing direction (X1-X2) as it extends upward Z1.

[0085] Furthermore, the cold plate (first cold plate) 311 facing the manifold 22 has an inclined surface 311a that inclines in a direction X1 away from the manifold 22 in the facing direction (X1-X2) as it moves upward Z1.

[0086] This prevents the inflow pipe 331 or the outflow pipe 332 from coming into contact with the cold plate (first cold plate) 311 and being damaged when connecting the inflow pipe 331 or the outflow pipe 332 to the manifolds 21, 22.

[0087] Furthermore, it is preferable that cooling device 301 further includes a buffer member (not shown) sandwiched in the opposing direction (X1-X2) between cold plate (first cold plate) 311 and manifolds 21 and 22. This prevents damage to manifolds 21 and 22 due to contact between cold plate (first cold plate) 311 and manifolds 21 and 22 caused by vibrations during transportation, for example.

[0088] Furthermore, it is preferable that the cooling device 301 further includes a buffer member (not shown) that is sandwiched in the vertical direction (Z1-Z2) between the top wall portion 51 and the manifolds 21, 22. This prevents the top wall portion 51 and the manifolds 21, 22 from coming into contact with each other due to vibrations during transportation, for example, and thus prevents the manifolds 21, 22 from being damaged.

[0089] (others) The above-described embodiment is merely an example of the present invention. The configuration of the embodiment may be appropriately modified without departing from the technical spirit of the present invention. Furthermore, the embodiments may be combined as far as possible. For example, in the above-described embodiment, the elbows 81 and 82 are disposed on the upper surfaces of the manifolds 21 and 22, but the elbows 81 and 82 may be disposed on the lower surfaces of the manifolds 21 and 22.

[0090] That is, the inlet pipe 31 is connected to the refrigerant pipe 21a at its end on one side (X1) in the opposing direction via an elbow 81 arranged on the underside of the manifold 21. The outlet pipe 32 is connected to the refrigerant pipe 22a at its end on the other side (X2) in the opposing direction via an elbow 82 arranged on the underside of the manifold 22. In this case, it is preferable to arrange the lower ends of the manifolds 21 and 22 above (Z1) the upper end of the cold plate 11. This increases the working space, making it easier to connect the inlet pipe 31 and the refrigerant pipe 21a. Also, the outlet pipe 32 is easier to connect to the refrigerant pipe 22a.

[0091] (Addendum) As described above, the cooling device (1) according to one aspect of the present disclosure includes a first cold plate (11) whose underside is in thermal contact with a heat-generating component and which has a first refrigerant flow path (11a) through which a refrigerant flows, a pair of manifolds (21, 22) arranged opposite each other across the first cold plate and having a first refrigerant pipe through which the refrigerant flows, and a flow inlet (110a) extending from one of the manifolds to an inlet (110a) of the first cold plate and causing the refrigerant to flow toward the first cold plate. The first configuration comprises an inlet pipe (31) and an outlet pipe (32) extending from an outlet (110b) of the first cold plate to the other manifold and causing the refrigerant to flow out toward the other manifold, the first refrigerant pipe extending in a cross direction (Y1-Y2) that crosses the opposing direction (X1-X2) of the pair of manifolds, and at least one of the inlet pipe and the outlet pipe is connected to the first refrigerant pipe via elbows (81, 82) arranged on the upper surface or the lower surface of the manifold.

[0092] In addition, in the above first configuration, the inlet pipe and the outlet pipe may be configured to be connected to the first refrigerant flow path via elbows (83, 84) arranged on the upper surface of the first cold plate (second configuration).

[0093] In addition, the first or second configuration may further include a supply pipe (41) that supplies the refrigerant to one of the manifolds and a discharge pipe (42) that discharges the refrigerant from the other manifold, and at least one of the supply pipe and the discharge pipe may be connected to the first refrigerant pipe via an elbow (85) arranged on the upper surface or the lower surface of the manifold (third configuration).

[0094] Furthermore, in any of the first to third configurations, the supply pipe and the discharge pipe may be pulled out in the same direction (X2) in the opposing direction, and one of the supply pipe and the discharge pipe may be connected to the first refrigerant pipe at the end of the manifold in the crossing direction that is arranged on the opposite side (X2) from the pulling-out direction of the supply pipe and the discharge pipe (fourth configuration).

[0095] Furthermore, in any of the first to fourth configurations, the end of the manifold arranged on the opposite side to the drawing-out direction in the cross direction may be configured to protrude in the cross direction more than the end of the manifold arranged on the drawing-out direction side in the cross direction (fifth configuration).

[0096] In addition, any of the first to fifth configurations may further include a bracket (50) having a plate-shaped top wall portion (51) covering the first cold plate from above and leg portions (52) extending downward from the outer periphery of the top wall portion and positioned outside the manifold in the opposing direction or the intersecting direction, and the manifold may be configured to be fixed to the leg portions (sixth configuration).

[0097] In any of the first to sixth configurations, the lower end of the manifold may be positioned higher than the upper end of the first cold plate (seventh configuration).

[0098] In addition, in any of the above first to seventh configurations, the vertical gap between the ceiling wall portion and the manifold may be larger than the vertical gap between the manifold and the first cold plate (eighth configuration).

[0099] In any of the first to eighth configurations, the ceiling wall portion may be configured to at least partially overlap the elbow disposed on the upper surface of the manifold in a top view (ninth configuration).

[0100] In any of the first to ninth configurations, the opposing direction and the intersecting direction may be perpendicular to each other (tenth configuration).

[0101] In any of the first to tenth configurations, a plurality of the first cold plates may be arranged in the intersecting direction and connected in parallel via a pair of the manifolds (eleventh configuration).

[0102] Furthermore, in any of the above first to eleventh configurations, the first cold plates may be arranged in a row between a pair of manifolds, the inlet pipe extends from one of the manifolds, branches off and is connected to each of the inlets of the first cold plates, and the outlet pipe extends from the other manifold, branches off and is connected to each of the outlets of the first cold plates (twelfth configuration).

[0103] In the twelfth configuration, two first cold plates may be arranged side by side in the opposing direction (thirteenth configuration).

[0104] In the twelfth configuration, the inlet pipe or the outlet pipe may be branched on an elbow disposed on the upper surface of one of the first cold plates (fourteenth configuration).

[0105] In the twelfth configuration, the cross-sectional area of ​​the flow path of the inlet pipe arranged upstream of the branch point is larger than the cross-sectional area of ​​the flow path of the inlet pipe arranged downstream of the branch point, The cross-sectional area of ​​the flow path of the outflow pipe arranged downstream of the branch point may be larger than the cross-sectional area of ​​the flow path of the outflow pipe arranged upstream of the branch point (15th configuration).

[0106] In any one of the first to fifteenth configurations, the inlet pipe and the outlet pipe are The refrigerant passage may be configured to include a cylindrical inner diameter portion that forms a flow path for the refrigerant, and a cylindrical outer diameter portion that covers and protects the inner diameter portion, wherein the inner diameter portion is made of a resin having a lower water absorption rate than the outer diameter portion, and the outer diameter portion is made of a resin having a higher bending stress than the inner diameter portion (16th configuration).

[0107] Furthermore, in any of the above configurations 1 to 16, one of the inlet pipe and the outlet pipe may be connected to the first refrigerant pipe via an elbow arranged on the upper or lower surface of the manifold, and the other of the inlet pipe and the outlet pipe may be connected to the first refrigerant pipe via a connector (382) arranged on the side surface of the manifold (configuration 17).

[0108] Furthermore, any of the first to seventeenth configurations may further include a second cold plate (312) whose underside is in thermal contact with the heat-generating component and which is arranged below the manifold, and the second cold plate may have a second refrigerant flow path (312a) that communicates with the first refrigerant pipe and through which the refrigerant flows (18th configuration).

[0109] In any one of the first to eighteenth configurations, at least one of the inlet pipe and the outlet pipe is provided with a band portion (34) that fastens and fixes an outer circumferential surface of the inlet pipe to the elbow, The top wall may have an opening (51a) that opens opposite the band in the vertical direction (19th configuration).

[0110] Furthermore, in any of the above first to nineteenth configurations, the first cold plate may have an inclined surface (311a) at the upper end of the surface facing the manifold in the opposing direction, which inclines in a direction away from the opposing manifold as it extends upward (twentieth configuration).

[0111] In addition, in any of the above first to twentieth configurations, the elbow arranged on the upper or lower surface of the manifold may have a protruding portion that protrudes in a direction closer to the first cold plate in the opposing direction than the periphery of the manifold (21st configuration).

[0112] In addition, in the above-mentioned 21st configuration, the elbow arranged on the upper or lower surface of the manifold may be configured to have an extension portion that extends in a direction away from the first cold plate than the center of the manifold in the opposing direction (22nd configuration).

[0113] Furthermore, in any one of the first to twenty-second configurations, a buffer member may be further provided that is sandwiched between the first cold plate and the manifold in the opposing direction (twenty-third configuration).

[0114] Furthermore, in any one of the first to twenty-third configurations, a buffer member may be further provided that is sandwiched between the ceiling wall portion and the manifold in the vertical direction (twenty-fourth configuration).

[0115] In addition, in a cooling unit (200) in which a plurality of cooling devices of any one of the first to twenty-fourth configurations are arranged in the intersecting direction, the manifold connected to the inlet pipe and the manifold connected to the outlet pipe may be configured to be adjacent to each other in the intersecting direction (twenty-fifth configuration). [Explanation of symbols]

[0116] 1, 201, 301 Cooling device 11, 211, 311 Cold plate (first cold plate) 11a refrigerant flow path (first refrigerant flow path) 21, 22, 221, 222 manifold 21a, 22a Refrigerant pipe (first refrigerant pipe) 31, 231, 331 Inflow pipe 32, 232, 332 Outflow pipe 33a Inner diameter part 33b Outer diameter part 34 Band Club 41, 241 Supply pipe 42, 242 discharge pipe 50 bracket 51 Ceiling wall 51a opening 52 Legs 81-85, 383A, 383B, 384A, 384b, 386 Elbow 110, 3110 Lid 110a, inlet 110b Outlet 111, 3111 bottom wall 111a, 3111a recess 111b, 3111b flange part 200 Cooling Unit 311A Cold Plate Group 311a Slope 312 Cold Plate (Second Cold Plate) 312a, 313a Second refrigerant flow path 385a Bis 386a extension 386b Protrusion 3110a Through hole

Claims

1. a first cold plate whose underside is in thermal contact with the heat-generating component and has a first refrigerant flow path through which a refrigerant flows; a pair of manifolds disposed opposite each other across the first cold plate and having first refrigerant pipes through which the refrigerant flows; an inlet pipe extending from one of the manifolds to an inlet of the first cold plate and allowing the refrigerant to flow toward the first cold plate; an outlet pipe extending from the outlet of the first cold plate to the other manifold and causing the refrigerant to flow out toward the other manifold; the first refrigerant pipe extends in a direction intersecting a direction in which the pair of manifolds face each other, At least one of the inlet pipe and the outlet pipe is connected to the first refrigerant pipe via an elbow arranged on an upper surface or a lower surface of the manifold.

2. The cooling device of claim 1 , wherein the inlet pipe and the outlet pipe are connected to the first refrigerant flow path via elbows disposed on the upper surface of the first cold plate.

3. a supply pipe for supplying the refrigerant to one of the manifolds; a discharge pipe for discharging the refrigerant from the other manifold, 3. The cooling device according to claim 1, wherein at least one of the supply pipe and the discharge pipe is connected to the first refrigerant pipe via an elbow disposed on an upper surface or a lower surface of the manifold.

4. the supply pipe and the discharge pipe are drawn out in the same direction of the opposing direction, 4. The cooling device according to claim 3, wherein one of the supply pipe and the discharge pipe is connected to the first refrigerant pipe at an end of the manifold in the intersecting direction that is arranged on the opposite side to the drawing direction of the supply pipe and the discharge pipe.

5. 5. The cooling device according to claim 4, wherein an end portion in the intersecting direction of the manifold arranged on the opposite side to the drawing-out direction protrudes in the intersecting direction more than an end portion in the intersecting direction of the manifold arranged on the drawing-out direction side.

6. a plate-shaped ceiling wall portion covering the first cold plate from above; a bracket having a leg portion extending downward from an outer periphery of the top wall portion and disposed outside the manifold in the opposing direction or the intersecting direction, The cooling device according to claim 1 or 2, wherein the manifold is fixed to the legs.

7. The cooling device of claim 6 , wherein a lower end of the manifold is located above an upper end of the first cold plate.

8. The cooling device according to claim 7 , wherein a vertical gap between the ceiling wall and the manifold is larger than a vertical gap between the manifold and the first cold plate.

9. The cooling device according to claim 6 , wherein the ceiling wall portion at least partially overlaps with the elbow disposed on the upper surface of the manifold when viewed from above.

10. The cooling device according to claim 1 or 2, wherein the opposing direction and the intersecting direction are orthogonal to each other.

11. 3. The cooling device according to claim 1, wherein a plurality of the first cold plates are arranged in the intersecting direction and connected in parallel via a pair of the manifolds.

12. a plurality of the first cold plates are arranged side by side between a pair of manifolds; the inlet pipe extends from one of the manifolds, branches, and is connected to each of the inlets of the plurality of first cold plates; 3 . The cooling device according to claim 1 , wherein the outlet pipe extends from the other manifold, branches, and is connected to each of the outlets of the plurality of first cold plates.

13. The cooling device according to claim 12 , wherein two of the first cold plates are arranged side by side in the opposing direction.

14. The cooling device according to claim 12 , wherein the inlet pipe or the outlet pipe branches off on an elbow disposed on an upper surface of one of the first cold plates.

15. a cross-sectional area of ​​a flow path of the inlet pipe arranged upstream of the branch point is larger than a cross-sectional area of ​​a flow path of the inlet pipe arranged downstream of the branch point; The cooling device according to claim 12 , wherein a cross-sectional area of ​​the flow path of the outflow pipe arranged downstream of the branch point is larger than a cross-sectional area of ​​the flow path of the outflow pipe arranged upstream of the branch point.

16. The inlet pipe and the outlet pipe are a cylindrical inner diameter portion that forms a flow path for the refrigerant; a cylindrical outer diameter portion that covers and protects the inner diameter portion, the inner diameter portion is made of a resin having a lower water absorption rate than the outer diameter portion, 3. The cooling device according to claim 1, wherein the outer diameter portion is made of a resin having a bending stress greater than that of the inner diameter portion.

17. one of the inlet pipe and the outlet pipe is connected to the first refrigerant pipe via an elbow disposed on an upper surface or a lower surface of the manifold; 3. The cooling device according to claim 1, wherein the other of the inlet pipe and the outlet pipe is connected to the first refrigerant pipe via a connector disposed on a side surface of the manifold.

18. a second cold plate whose underside is in thermal contact with the heat-generating component and which is disposed below the manifold; 3. The cooling device according to claim 1, wherein the second cold plate has a second refrigerant flow path communicating with the first refrigerant pipe and through which the refrigerant flows.

19. At least one of the inlet pipe and the outlet pipe is provided with a band portion that fastens and fixes an outer circumferential surface of the inlet pipe to the elbow, The cooling device according to claim 6 , wherein the top wall portion has an opening that opens opposite the band portion in the vertical direction.

20. 3. The cooling device according to claim 1, wherein the first cold plate has an upper end portion of a surface facing the manifold in the facing direction, the upper end portion having an inclined surface that slopes upward in a direction away from the opposing manifold.

21. 3. The cooling device according to claim 1, wherein the elbow disposed on the upper surface or the lower surface of the manifold has a protruding portion that protrudes in a direction closer to the first cold plate in the opposing direction than the periphery of the manifold.

22. The cooling device according to claim 21 , wherein the elbow disposed on the upper surface or the lower surface of the manifold has an extension portion that extends in a direction away from the first cold plate than the center of the manifold in the opposing direction.

23. The cooling device according to claim 1 or 2, further comprising a buffer member sandwiched between the first cold plate and the manifold in the opposing direction.

24. The cooling device according to claim 6 , further comprising a buffer member sandwiched between the ceiling wall portion and the manifold in the vertical direction.

25. 3. A cooling unit in which a plurality of cooling devices according to claim 1 or claim 2 are arranged in the cross direction, The cooling unit, wherein the manifold connected to the inlet pipe and the manifold connected to the outlet pipe are adjacent to each other in the intersecting direction.

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