cold plate

Abstract

The cold plate in the exemplary embodiment includes a bottom wall, a top wall, multiple blades, side walls, and a mesh member. The lower surface of the bottom wall is in thermal contact with the heating element. The top wall covers the upper surface of the bottom wall. Multiple blades are arranged on the upper surface of the bottom wall and extend in a straight line. The side walls are disposed between the bottom wall and the top wall, surrounding the blades and forming a refrigerant flow path inside for refrigerant to flow. The mesh member is disposed between the top wall and the blades, and multiple sheet-like meshes made of metal components are stacked on top of each other. The multiple meshes are fixed to each other by spot welding.

Description

Technical Field

[0001] This invention relates to a cold plate. Background Technology

[0002] A cold plate for cooling an object may have a bottom wall, side walls, a top wall, and multiple blades. The lower surface of the bottom wall is in thermal contact with the heat-generating component. The top wall covers the upper surface of the bottom wall. The blades are arranged on the upper surface of the bottom wall and extend in a straight line. The side walls connect the bottom wall and the top wall, surround the blades, and form a refrigerant flow path inside for refrigerant to circulate. The cold plate is manufactured by joining the bottom wall and the top wall together (see, for example, Patent Document 1).

[0003] Furthermore, as a technique to improve the cooling performance of cold plates, there is a technique of creating a mesh component by stacking multiple metallic meshes between the blades and the top wall. In this way, the gap between the blades and the top wall in the cold plate is filled by the mesh component, allowing the refrigerant to flow more easily between the blades, reducing flow path losses, and thus improving cooling performance.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Chinese Patent Application Publication No. 110600444 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, for cold plates with a simple mesh structure consisting of multiple layers of mesh arranged between the blades and the top wall, there is room for improvement in terms of assemblability and cooling performance.

[0009] The exemplary embodiments were made in view of the above, and their purpose is to provide a cold plate that can improve assemblability and cooling performance.

[0010] Solution for solving the problem

[0011] The cold plate in an exemplary embodiment includes a bottom wall, a top wall, multiple blades, side walls, and a mesh member. The lower surface of the bottom wall is in thermal contact with a heating element. The top wall covers the upper surface of the bottom wall. The multiple blades are arranged on the upper surface of the bottom wall and extend in a straight line. The side walls are disposed between the bottom wall and the top wall, surrounding the blades and forming a refrigerant flow path inside for refrigerant to flow. The mesh member is disposed between the top wall and the blades, and multiple sheet-like meshes made of metal are stacked on top of each other. The multiple meshes are fixed to each other by spot welding.

[0012] Invention Effects

[0013] According to the exemplary embodiment of the cold plate, assemblability can be improved by preventing the displacement of the stacked mesh, and cooling performance can be improved by suppressing the deformation of the blades caused by the mesh components. Attached Figure Description

[0014] Figure 1 This is an exploded perspective view of the cold plate in the embodiment.

[0015] Figure 2 This is a cross-sectional diagram illustrating the flow of refrigerant in the mesh component according to the embodiment.

[0016] Figure 3 This is a top view illustration of the mesh components in the implementation method.

[0017] Figure 4 This is a cross-sectional diagram illustrating the thickness of the mesh component in the embodiment.

[0018] Figure 5 This is a cross-sectional diagram illustrating the structure of a mesh component in a modified embodiment. Detailed Implementation

[0019] Hereinafter, exemplary embodiments of the cold plate will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiments shown below. Furthermore, in the following description, the same reference numerals are used to denote the same constituent elements, thereby omitting repeated descriptions.

[0020] Figure 1 This is an exploded perspective view of the cold plate 2 in the embodiment. (See diagram below.) Figure 1 As shown, it includes a plate body 3, a top wall portion 4, and a mesh component 5. The plate body 3 has a bottom wall portion 31 in the central area when viewed from above, the lower surface of which is in thermal contact with the heating element.

[0021] The top wall portion 4 is a cover that covers the upper surface of the bottom wall portion 31. The top wall portion 4 includes: a refrigerant inlet 41 that extends through the top wall portion 4 in the thickness direction; and a refrigerant outlet 42 that extends through the top wall portion 4 in the thickness direction.

[0022] Furthermore, the plate body 3 has a plurality of blades 32. The plurality of blades 32 are arranged on the upper surface of the bottom wall portion 31 and extend in a straight line. Moreover, the plate body 3 has a side wall portion 33. The side wall portion 33 is disposed between the bottom wall portion 31 and the top wall portion 4. The side wall portion 33 surrounds the plurality of blades 32 and forms a refrigerant flow path for refrigerant to flow inside.

[0023] The mesh component 5 is disposed between the top wall portion 4 and the blade 32. The mesh component 5 is formed by stacking multiple sheet-like meshes 51 made of metal material. The multiple meshes 51 are fixed to each other by spot welding at multiple welding points 52.

[0024] The mesh component 5 has a refrigerant inlet 53 located at the center of the longitudinal direction of the plurality of blades 32, which is a refrigerant inlet to the inter-blade flow path 34. In addition, the plate body 3 has refrigerant outlets 35 formed between the two ends of the blades 32 and the sidewall portion 33 in the longitudinal direction of the blades 32, which are refrigerant outlets from the inter-blade flow path 34.

[0025] In the cold plate 2, with the mesh component 5 placed on the upper surface of the blade 32 in the plate body 3, the space surrounded by the bottom wall portion 31 and the side wall portion 33 is closed by the top wall portion 4.

[0026] Here, refer to Figure 1 and Figure 2 The flow of refrigerant in cold plate 2 is explained. Figure 2 This is a cross-sectional diagram illustrating the flow of the refrigerant in the mesh component 5 according to the embodiment. (As shown...) Figure 1 As shown, refrigerant flows into the interior of the cold plate 2 from the inlet 41 of the top wall 4. Figure 1 and Figure 2 As shown, the refrigerant flowing into the interior of the cold plate 2 flows into the inter-blade flow path 34 from the inlet 53 of the mesh component 5.

[0027] As the refrigerant flows into the inter-blade flow path 34, it absorbs heat from the heating element (not shown) that is in contact with the lower surface of the bottom wall portion 31. Afterward, the refrigerant flows out from the outlet 35 of the inter-blade flow path 34 through the outer periphery of the mesh member 5 and out from the outlet 42 of the top wall portion 4 to the outside of the cold plate 2.

[0028] It should be noted that the inlet 41 and outlet 42 of the cold plate 2 are connected to an external flow path via a flow path pipe (not shown). As an example, the external flow path is connected to a refrigerant circulation device. The refrigerant flowing into the refrigerant circulation device from the outlet 42 is cooled inside the refrigerant circulation device and then sent out again to the inlet 41 of the cold plate 2 via the external flow path.

[0029] Therefore, the cold plate 2 can cool the heat-generating components by circulating the refrigerant internally. In this cold plate 2, the mesh member 5 is located in the gap between the blade 32 and the top wall 4, thus reducing the amount of refrigerant flowing in the gap between the blade 32 and the top wall 4, and correspondingly increasing the flow rate of the refrigerant flowing in the flow path 34 between the blades, thereby improving the cooling performance.

[0030] Furthermore, in the mesh component 5, as described above, multiple meshes 51 are fixed to each other by spot welding at multiple welding points 52. Therefore, in areas other than the spot-welded welding points 52, the thickness of the mesh component 5 is uniform, thus suppressing local deformation of the blades 32 caused by the mesh component 5, thereby suppressing the increase of flow path resistance in the flow path 34 between the blades.

[0031] Furthermore, according to the mesh component 5 of this disclosure, multiple meshes 51 are spot-welded to each other before being disposed within the cold plate 2, thus the meshes 51 are less prone to positional displacement and the assemblability is improved.

[0032] In addition, such as Figure 2 As shown, the meshes 51 are spot-welded together at one point (welding portion 52) on the flow path between the refrigerant inlet 53 of the inter-blade flow path 34 and the refrigerant outlet 35 of the inter-blade flow path 34. This fixes the meshes 51 together and minimizes the increase in flow path resistance of the inter-blade flow path 34 due to the spot-welded welding portion 52.

[0033] Next, refer to Figure 3 The welding part 52 of the spot weld in the mesh component 5 will be further explained. Figure 3 This is a top view illustrating the mesh component 5 of the embodiment. (See diagram below.) Figure 3 As shown, the welding portion 52 of the mesh 51 located on the inner side of the periphery of the mesh member 5 is spot welded.

[0034] Therefore, it is easy to make the thickness of the entire mesh component 5 uniform, and it can suppress the occurrence of refrigerant flow disturbance caused by the spot welded weld portion 52 at the refrigerant inlet / outlet (e.g., outlet 35) disposed at the periphery of the mesh component 5.

[0035] Next, refer to Figure 4 The thickness of mesh component 5 is explained. Figure 4 This is a cross-sectional diagram illustrating the thickness of the mesh member 5 in the embodiment. (See diagram below.) Figure 4 As shown, the thickness D1 of the mesh component 5 when it is not positioned between the top wall portion 4 and the blade 32 is more than 0.8 times the thickness D2 of the gap between the top wall portion 4 and the blade 32 when the top wall portion 4 is assembled to the plate body 3.

[0036] Therefore, the cold plate 2 suppresses the deformation of the blade 32 by using the mesh component 5 to fill the gap between the upper end of the blade 32 and the top wall 4, and suppresses the refrigerant from flowing outside the blade flow path 34, thereby improving the cooling performance.

[0037] Furthermore, the thickness D1 of the mesh member 5 when it is not positioned between the top wall portion 4 and the blade 32 can be more than 1.0 times the thickness of the gap between the top wall portion 4 and the blade 32 when the top wall portion 4 is assembled to the plate body 3.

[0038] Thus, the cold plate 2 transfers heat from the refrigerant to the top wall 4 through the mesh member 5 by bringing the mesh member 5 into contact with the top wall 4, thereby improving heat dissipation performance.

[0039] Furthermore, the thickness D1 of the mesh member 5 when it is not positioned between the top wall portion 4 and the blade 32 can be less than 1.2 times the thickness of the gap between the top wall portion 4 and the blade 32 when the top wall portion 4 is assembled to the plate body 3.

[0040] If the thickness D1 of the cold plate 2 when it is not positioned between the top wall 4 and the blade 32 is less than 1.2 times the thickness of the gap between the top wall 4 and the blade 32, then even if the mesh member 5 comes into contact with the blade 32, the deformation of the blade 32 can be suppressed.

[0041] The thickness of the mesh component 5 is obtained by multiplying the thickness of the thinnest mesh 51, the thickest mesh 51, or the average thickness of the multiple meshes 51 by the number of meshes 51 stacked. Therefore, the appropriate number of meshes 51 stacked can be set according to their thickness.

[0042] Next, refer to Figure 5 A modified example of the construction of mesh component 5 will be explained. Figure 5 This is a cross-sectional diagram illustrating the structure of the mesh member 5A in a modified example of the embodiment. (See diagram below.) Figure 5 As shown, the modified mesh component 5A is formed by stacking multiple (three in this case) mesh assemblies 54, which are obtained by stacking multiple (three in this case) meshes 51 and spot welding them together.

[0043] According to the modified mesh member 5A, damage to the mesh 51 caused by spot welding of multiple meshes 51 in a single operation can be suppressed. Furthermore, while the flatness of the meshes 51 may deteriorate when multiple meshes 51 are spot welded in a single operation, the flatness of the mesh assembly 54 can be maintained because fewer meshes 51 are spot welded. As a result, the flatness of the mesh member 5A formed by stacking multiple mesh assemblies 54 can also be maintained.

[0044] It should be noted that when multiple mesh components 54 are stacked to form a mesh member 5A, it is preferable to stagger the welding parts 52 of each mesh component 54 so that the spot welded welding parts 52 in each mesh component 54 do not overlap when viewed from above. This further improves the flatness of the mesh member 5A.

[0045] Furthermore, when multiple meshes 51 are overlapped and spot-welded to form mesh components 5 and 5A, multiple meshes 51 with different thicknesses can also be combined. Thus, by selecting the thickness of the combined meshes 51, the thickness of the entire mesh component 5 and 5A is easily adjusted.

[0046] Alternatively, multiple meshes 51 with different mesh sizes can be stacked and spot-welded to form mesh components 5 and 5A. In this case, if the mesh 51 in contact with the tip of the blade 32 is made to have a finer mesh than the other meshes 51, the heat conduction from the blade 32 to the mesh 51 is improved because the surface area of ​​the fine mesh mesh 51 is larger than that of the other meshes 51.

[0047] Furthermore, when multiple meshes 51 of the same mesh size are stacked and spot-welded to form mesh components 5 and 5A, the finer the mesh size of the mesh 51, the more effectively it can suppress the flow of refrigerant from the inter-blade flow path 34 to the mesh 51, thus improving the cooling performance.

[0048] Conversely, the coarser mesh 51 is more prone to deformation than the finer mesh 51. Therefore, it has a greater effect on absorbing dimensional differences in the thickness direction, and can fill the gap between the blade 32 and the top wall 4 while suppressing the deformation of the blade 32.

[0049] In addition, in the cold plate 2, a porous or sponge-like component can be arranged between the blade 32 and the top wall 4 to replace the mesh component 5, 5A.

[0050] In this case, the thickness of the porous or sponge-like component is preferably the same as the thickness of the mesh components 5 and 5A. The surface area of ​​the porous or sponge-like component is larger than that of the mesh 51, thus improving its heat absorption performance and further enhancing the cooling performance of the cold plate 2.

[0051] It should be noted that this technology can be configured as described below.

[0052] (1) A cold-rolled steel plate, comprising: The bottom wall portion, its lower surface is in thermal contact with the heating element; The top wall portion covers the upper surface of the bottom wall portion; Multiple blades are arranged on the upper surface of the bottom wall and extend in a straight line. A sidewall portion, disposed between the bottom wall portion and the top wall portion, surrounds the blade and forms a refrigerant flow path internally for refrigerant circulation; and A mesh component, disposed between the top wall and the blade, comprises multiple sheet-like meshes made of metal components stacked together. Multiple meshes are fixed together by spot welding.

[0053] (2) According to the cold plate described in (1), wherein, The meshes are spot-welded together at one point on the flow path between the refrigerant inlet to the inter-blade flow path and the refrigerant outlet from the inter-blade flow path. The refrigerant inlet to the inter-blade flow path is located at the center of the plurality of blades in the longitudinal direction, and the refrigerant outlet from the inter-blade flow path is formed between the two ends of the blades in the longitudinal direction and the sidewall portion.

[0054] (3) The cold plate according to (1) or (2), wherein, The mesh is spot-welded in a region that is closer to the periphery.

[0055] (4) The cold-rolled plate according to any one of (1) to (3), wherein, The mesh component is formed by stacking multiple mesh assemblies, and the mesh assembly is obtained by stacking multiple mesh sheets and spot welding them together.

[0056] (5) The cold-rolled plate according to any one of (1) to (4), wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is more than 0.8 times the thickness of the gap between the top wall and the blade.

[0057] (6) The cold-rolled plate according to any one of (1) to (5), wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is more than 1.0 times the thickness of the gap between the top wall and the blade.

[0058] (7) The cold-rolled plate according to any one of (1) to (6), wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is less than 1.2 times the thickness of the gap between the top wall and the blade.

[0059] (8) The cold-rolled plate according to any one of (5) to (7), wherein, The thickness of the mesh component is obtained by multiplying the thickness of the thinnest mesh, the thickest mesh, or the average thickness of the multiple meshes stacked together by the number of meshes stacked together.

[0060] Those skilled in the art can readily derive further effects and variations. Therefore, the broader scope of the invention is not limited to the specific details and representative embodiments shown and described above. Thus, various modifications can be made without departing from the spirit or scope of the overall invention as defined by the appended claims and their equivalents.

[0061] Explanation of reference numerals in the attached figures: 2: Cold-rolled steel plate; 3: Main body of the board; 4: Top wall part; 5: Wire mesh components; 5A: Wire mesh components; 31: Bottom wall; 32: Leaf blade; 33: Side wall portion; 34: Flow path between blades; 35, 42: Outlet; 41, 53: Inlet / outlet; 51: Net; 52: Welded area; 54: Network components.

Claims

1. A cold-rolled steel plate, comprising: The bottom wall portion, its lower surface is in thermal contact with the heating element; The top wall portion covers the upper surface of the bottom wall portion; Multiple blades are arranged on the upper surface of the bottom wall and extend in a straight line. The side wall portion is disposed between the bottom wall portion and the top wall portion, surrounding the blade and forming a refrigerant flow path inside for refrigerant to circulate; as well as A mesh component, disposed between the top wall and the blade, comprises multiple sheet-like meshes made of metal components stacked together. Multiple meshes are fixed together by spot welding.

2. The cold-rolled plate according to claim 1, wherein, The meshes are spot-welded together at one point on the flow path between the refrigerant inlet to the inter-blade flow path and the refrigerant outlet from the inter-blade flow path. The refrigerant inlet to the inter-blade flow path is located at the center of the plurality of blades in the longitudinal direction, and the refrigerant outlet from the inter-blade flow path is formed between the two ends of the blades in the longitudinal direction and the sidewall portion.

3. The cold-rolled plate according to claim 1, wherein, The mesh is spot-welded in a region that is closer to the periphery.

4. The cold-rolled plate according to claim 1, wherein, The mesh component is formed by stacking multiple mesh assemblies, and the mesh assembly is obtained by stacking multiple mesh sheets and spot welding them together.

5. The cold-rolled plate according to claim 1, wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is more than 0.8 times the thickness of the gap between the top wall and the blade.

6. The cold-rolled plate according to claim 1, wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is more than 1.0 times the thickness of the gap between the top wall and the blade.

7. The cold-rolled plate according to claim 1, wherein, The thickness of the mesh member when it is not positioned between the top wall and the blade is less than 1.2 times the thickness of the gap between the top wall and the blade.

8. The cold-rolled steel plate according to any one of claims 5 to 7, wherein, The thickness of the mesh component is obtained by multiplying the thickness of the thinnest mesh, the thickest mesh, or the average thickness of the multiple meshes stacked together by the number of meshes stacked together.

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