Cold plate

Abstract

To provide a cold plate capable of suppressing deformation of blades at the time of manufacturing.SOLUTION: A cold plate includes a bottom wall 12, a top wall, a plurality of blades 12a, a side wall 14, and a mesh member 20. The bottom wall has a lower surface in thermal contact with a heat generating component. The top wall covers an upper surface of the bottom wall. The blades are arranged side by side on the upper surface of the bottom wall, and they extend linearly. The side wall is located between the bottom wall and the top wall, and defines a refrigerant flow path which surrounds the blades and inside of which a refrigerant flows. The mesh member is located between the top wall and the blades, and it is a sheet-shaped mesh member made of a metal member.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cold plate. [Background technology]

[0002] A conventional cold plate includes a bottom wall, a top wall, multiple blades, and a side wall. The bottom surface of the bottom wall is in thermal contact with the heat-generating component. The top wall covers the top surface of the bottom wall. The blades are arranged alongside the top surface of the bottom wall and extend linearly. The side wall connects the bottom wall and the top wall, surrounding the blades to form a refrigerant flow path through which a refrigerant flows. The cold plate is manufactured by joining the bottom wall and the top wall (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Patent Application Publication No. 110600444 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional cold plates, there is a possibility that the blades may be deformed when joining the top wall to the bottom wall, resulting in a decrease in the cooling effect.

[0005] An object of the present invention is to provide a cold plate that can suppress deformation of the blades during manufacturing. [Means for solving the problem]

[0006] An exemplary cold plate of the present invention includes a bottom wall, a top wall, a plurality of blades, a side wall, and a mesh member. The bottom surface of the bottom wall is in thermal contact with a heat-generating component. The top wall covers the top surface of the bottom wall. The blades are arranged alongside the top surface of the bottom wall and extend linearly. The side wall is disposed between the bottom wall and the top wall, surrounding the blades to form a coolant flow path through which a coolant flows. The mesh member is a sheet-like mesh member made of a metal material and disposed between the top wall and the blades. [Effects of the Invention]

[0007] According to an exemplary embodiment of the present invention, a cold plate capable of suppressing deformation of blades during manufacturing can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a cold plate according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of a cold plate according to an embodiment of the present invention. [Figure 3] FIG. 3 is a top view of a cold plate according to an embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 6 is a top view of a bottom wall portion of a cold plate according to an embodiment of the present invention. [Figure 7] FIG. 7 is an enlarged perspective view of a portion of the cold plate according to the embodiment of the present invention. [Figure 8] FIG. 8 is a top view showing a modified example of the bottom wall portion of the cold plate according to the 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 bottom wall 12 and the top wall 13 face each other will be referred to as the "vertical direction." Furthermore, the direction in which the top wall 13 is disposed relative to the bottom wall 12 will be referred to as the "upward direction," and the direction opposite to the direction in which the top wall 13 is disposed will be referred to as the "downward direction." In this application, the direction perpendicular to the "vertical direction" will be referred to as the "horizontal direction," and the shapes and positional relationships of the various parts will be described.

[0010] The direction in which the blades 12a of the cold plate 10 extend is referred to as the extension direction (X1-X2), and the direction in which the blades 12a are arranged is referred to as the arrangement direction (Y1-Y2). In this embodiment, the vertical direction (Z1-Z2) is perpendicular to the extension direction (X1-X2) and the arrangement direction (Y1-Y2). However, these definitions of the vertical direction and horizontal direction are provided merely for the sake of convenience and do not limit the orientation of the cold plate 10 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] <Cold plate explanation> A cold plate according to an exemplary embodiment of the present invention will now be described. Fig. 1 is a perspective view of a cold plate 10 according to an embodiment of the present invention, and Fig. 2 is an exploded perspective view of the cold plate 10. Fig. 3 is a top view of the cold plate 10, Fig. 4 is a cross-section taken along line AA in Fig. 3, and Fig. 5 is a cross-section taken along line BB in Fig. 2. Fig. 6 is a top view of the bottom wall portion 12 of the cold plate 10. Note that elbows 15 and refrigerant pipes 16 are omitted from Figs. 1 to 5.

[0013] The cold plate 10 is made of a metal with high thermal conductivity, such as copper or aluminum, and includes a bottom wall 12, a top wall 13, a side wall 14, a plurality of blades 12a, a plurality of columns 12b, and a mesh member 20. In this embodiment, the cold plate 10 is rectangular when viewed from above. That is, the bottom wall 12 and the top wall 13 are rectangular plates that extend horizontally when viewed from above. Note that, although the bottom wall 12 and the top wall 13 in this embodiment are square when viewed from above, they are not limited to this and may be polygonal with multiple corners or circular when viewed from above.

[0014] The cold plate 10 is made of a copper alloy, which improves its strength. An example of a copper alloy is chromium copper. The cold plate 10 is made of chromium copper, which further improves its strength. A suitable chromium copper alloy is, for example, an alloy in which 0.3 to 1.7 wt% of chromium is added to copper. If the amount of chromium added to copper is less than 0.3 wt%, the strength of the cold plate 10 decreases. If the amount of chromium added to copper is more than 1.7 wt%, the hardness increases, which reduces the workability of the metal.

[0015] From the viewpoint of workability and processing accuracy, the bottom wall portion 12, the plurality of blades 12a, and the plurality of column portions 12b (described later) are preferably made of chromium copper. On the other hand, copper has higher thermal conductivity than chromium copper. Therefore, the cold plate 10 may be made of a combination of chromium copper and copper. For example, some of the blades 12a that require workability and processing accuracy are made of chromium copper, and the other blades 12a are made of copper. The entire cold plate 10 may be made of only either copper or chromium copper. When the entire cold plate 10 is made of only copper, the thermal conductivity of the cold plate 10 is improved.

[0016] The bottom wall 12 has a lower surface that is in thermal contact with a heat-generating component H to be cooled, such as a CPU or GPU (see FIG. 4).

[0017] The entire top wall 13 may be made of a metal material, or may be made of a resin material with the outer surface being made of a metal material by plating. If plating is used, it is more preferable to make it of the same metal material as the bottom wall 12. By making at least a portion of the top wall 13 of a metal material, strength is improved. Furthermore, by making it of the same metal material as the bottom wall 12, it is possible to reduce the potential difference that occurs between the bottom wall 12 and the top wall 13 when a refrigerant is circulated through the cold plate 10. Therefore, corrosion of the top wall 13 can be suppressed.

[0018] The top wall 13 also has a protrusion 13e protruding from the bottom surface (see FIG. 5). The protrusion 13e contacts the column 12b (described later) in the vertical direction (Z1-Z2). In this embodiment, the protrusion 13e extends in the arrangement direction (Y1-Y2). The protrusion 13e and the side wall 14 face each other across a gap in the extension direction (X1-X2) and the arrangement direction (Y1-Y2). The provision of the protrusion 13e further improves the strength of the top wall 13.

[0019] The side wall 14 is disposed between the bottom wall 12 and the top wall 13 and surrounds the blades 12a to form a refrigerant flow path 11 through which the refrigerant flows. In this embodiment, the side wall 14 has a rectangular ring shape when viewed from above. The side wall 14 connects the peripheries of the bottom wall 12 and the top wall 13.

[0020] The side wall 14 has a first side wall 14a that protrudes upward (Z1) from the periphery of the bottom wall 12, and a second side wall 14b that protrudes downward (Z2) from the periphery of the top wall 13. The upper surface of the first side wall 14a and the lower surface of the second side wall 14b are joined via a seal member 30. The seal member 30 is formed in an annular shape surrounding the refrigerant flow path 11. For example, a rubber O-ring or rubber packing is preferably used as the seal member 30. This makes it possible to prevent refrigerant leakage around the refrigerant flow path 11.

[0021] In this embodiment, the side wall 14 is composed of the first side wall 14a and the second side wall 14b, but may be composed of only one of them. That is, the upper surface of the first side wall 14a may be joined to the lower surface of the top wall 13 omitting the second side wall 14b, or the lower surface of the second side wall 14b may be joined to the upper surface of the bottom wall 12 omitting the first side wall 14a.

[0022] The first side wall portion 14a has first screw holes 12c and second screw holes 12d that penetrate in the up-down direction (Z1-Z2). The first screw holes 12c are arranged in four locations at the corners of the bottom wall portion 12. A plurality of second screw holes 12d are arranged surrounding the refrigerant flow path 11.

[0023] The second side wall portion 14b has third screw holes 13c penetrating in the vertical direction (Z1-Z2) and fourth screw holes (not shown) recessed upward Z1. The third screw holes 13c are arranged in four locations at the corners of the top wall portion 13. A plurality of fourth screw holes are arranged surrounding the refrigerant flow path 11.

[0024] The second screw hole 12d and the fourth screw hole (not shown) are aligned and screwed in place with the screw 44. This fixes the bottom wall 12 and the top wall 13 together. The screw 44 may be, for example, a tapping screw. If the top wall 13 and the second side wall 14b are made of metal, the fourth screw hole (not shown) may be threaded in advance. An adhesive may also be applied between the screw 44 and the fourth screw hole. This improves the fixing strength between the bottom wall 12 and the top wall 13.

[0025] The first screw hole 12c and the third screw hole 13c are aligned, and the cold plate 10 is screwed to the actual device having the heat-generating component H by the screw 41 and the stopper 43 via the spring 42. This allows the elastic force of the spring 42 to bring the cold plate 10 into contact with the heat-generating component H with a predetermined pressing force.

[0026] The refrigerant flow path 11 is formed in an internal space surrounded by a bottom wall portion 12, a top wall portion 13, and a side wall portion 14. The cold plate 10 has an inlet 13a through which the refrigerant flows into the refrigerant flow path 11, and an outlet 13b through which the refrigerant flows out of the refrigerant flow path 11.

[0027] The inlet 13a is disposed on one end side of the refrigerant flow path 11. The outlet 13b is disposed on the other end side of the refrigerant flow path 11. The refrigerant that flows into the refrigerant flow path 11 via the inlet 13a flows out of the refrigerant flow path 11 via the outlet 13b. In this embodiment, the inlet 13a and the outlet 13b are circular and are formed by vertically penetrating the top wall portion 13. The refrigerant is a liquid, and for example, an antifreeze solution such as an ethylene glycol aqueous solution or a propylene glycol aqueous solution, pure water, or the like is used.

[0028] The blades 12a are arranged side by side on the upper surface of the bottom wall 12 and extend linearly in the extension direction (X1-X2). In this embodiment, the blades 12a are made of the same material as the bottom wall 12. The blades 12a are formed, for example, by cutting multiple linear grooves extending in the extension direction (X1-X2) on the upper surface of the bottom wall 12. This improves thermal conductivity from the bottom wall 12 to the refrigerant flowing through the refrigerant flow path 11 via the blades 12a. The blades 12a may be made of a material different from that of the bottom wall 12. For example, the blades 12a may be formed on a plate-shaped base member, and the bottom wall 12 and the base member may be welded to each other.

[0029] The plurality of pillar portions 12b protrude from the upper surface of the bottom wall portion 12 and face the extending direction (X1-X2) of the blades 12a on the inside of the side wall portion 14, sandwiching the blades 12a therebetween. In this embodiment, the upper ends of the pillar portions 12b are located higher (Z1) than the upper ends of the blades 12a. The width of the pillar portions 12b in the extending direction (X1-X2) and the width of the pillar portions 12b in the arrangement direction (Y1-Y2) are greater than the width of the blades 12a in the arrangement direction (Y1-Y2).

[0030] In this embodiment, the column portions 12b extend in the arrangement direction (Y1-Y2) of the blades 12a. The column portions 12b face the blades 12a in the extension direction (X1-X2) via a gap. The ends of the column portions 12b in the arrangement direction (Y1-Y2) face the sidewall portions 14 extending in the extension direction (X1-X2) via a gap at the corners of the sidewall portions 14. The ends of the column portions 12b in the arrangement direction (Y1-Y2) face the sidewall portions 14 extending in the arrangement direction (Y1-Y2) via a gap in the extension direction (X1-X2). The refrigerant flows through the gaps around the column portions 12b.

[0031] The provision of the pillars 12b improves the strength of the bottom wall 12 and suppresses bending of the bottom wall 12. This reduces deformation of the blades 12a. Furthermore, the pillars 12b extend in the arrangement direction (Y1-Y2) of the blades 12a, which further suppresses bending of the bottom wall 12 in the arrangement direction (Y1-Y2).

[0032] Furthermore, when joining the top wall portion 13 to the bottom wall portion 12, the pillar portions 12b support the top wall portion 13. This prevents the top wall portion 13 from pressing the blades 12a via the mesh member 20, which would otherwise cause the blades 12a to deform. The upper ends of the pillar portions 12b are located higher (Z1) than the upper ends of the blades 12a, which reduces the force applied from the top wall portion 13 to the blades 12a via the mesh member 20. This prevents deformation of the blades 12a during manufacturing. This prevents a decrease in the cooling effect due to deformation of the blades 12a. The upper ends of the pillar portions 12b may be located at the same position as the upper ends of the blades 12a.

[0033] Furthermore, by providing protrusions 13e that come into contact with pillars 12b on top wall 13, the strength of top wall 13 is improved and deflection of top wall 13 can be suppressed. This further reduces the force applied from top wall 13 to blade 12a via mesh member 20. Furthermore, by providing pillars 12b and protrusions 13e, it becomes easier to position mesh member 20 relative to bottom wall 12 and to top wall 13.

[0034] The pillars 12b are arranged opposite the blades 12a in the extension direction (X1-X2) of the blades 12a, sandwiching the blades 12a therebetween. When the blades 12a are formed by cutting, the cutting blade is inserted in the arrangement direction (Y1-Y2). This makes it difficult for the cutting blade to come into contact with the pillars 12b. Therefore, the blades 12a aligned in the arrangement direction (Y1-Y2) can be precisely formed, improving the manufacturing efficiency of the cold plate 10.

[0035] The mesh member 20 is in a sheet shape and is disposed between the top wall portion 13 and the blade 12a. The mesh member 20 is also disposed between the pair of pillar portions 12b.

[0036] The mesh member 20 is made of a metal material and is formed, for example, by weaving metal wire members. The mesh member 20 is preferably made of the same material as the metal material constituting the top wall portion 13 or the bottom wall portion 12. By disposing the mesh member 20 made of a metal material, the strength of the top wall portion 13 is improved, and deformation of the top wall portion 13 can be suppressed. Furthermore, the thermal conductivity from the refrigerant flowing through the refrigerant flow path 11 to the top wall portion 13 is improved via the mesh member 20. This makes it possible to further suppress temperature increases in the heat-generating components H. Furthermore, the mesh member 20 made of a metal material is less likely to deform due to heat, and can suppress clogging of the refrigerant flow path 11 and a decrease in the cooling effect.

[0037] In this embodiment, mesh member 20 is sandwiched between top wall 13 and blades 12a in the vertical direction (Z1-Z2) and is in contact with top wall 20 and blades 12a. This integrates top wall 13, mesh member 20, and blades 12a, further improving the strength of cold plate 10.

[0038] The mesh member 20 is fixed to the top wall 13 via a welded or brazed joint. This further improves the strength of the top wall 13. Specifically, the mesh member 20 is fixed by placing brazing material between the top wall 13 and the mesh member 20, and then firing the cold plate 10 in a heating furnace with the top wall 13 and bottom wall 12 joined together. This makes it easy to fix the mesh member 20 to the top wall 13.

[0039] At this time, some of the brazing material melted during heating flows into the mesh member 20. The brazing material tends to remain in the mesh member 20 due to capillary action and is less likely to flow into the gaps between the blades 12a. This reduces clogging of the flow paths between the blades 12a by the brazing material. This prevents a reduction in the cooling effect of the cold plate 10.

[0040] The mesh opening of the mesh member 20 is preferably smaller than the gap between adjacent blades 12a in the arrangement direction (Y1-Y2). By making the mesh opening of the mesh member 20 smaller than the gap between the blades 12a, the brazing material melted by heat is more likely to remain in the mesh member due to capillary action. This further prevents the brazing material from flowing into the flow paths between the blades 12a. Note that the "mesh opening" refers to the size of the gap between the mesh and refers to the shortest distance between two adjacent metal wire members extending parallel to a predetermined direction in the mesh member 20.

[0041] It is preferable that multiple mesh members 20 are arranged in a stacked manner in the vertical direction (Z1-Z2 direction). By stacking multiple mesh members 20, the mesh members 20 act as a buffer material and protect the blade 12a. This reduces deformation of the blade 12a when joining the bottom wall portion 12 and the top wall portion 13. Furthermore, by stacking multiple mesh members 20, the brazing material melted by heat is more likely to remain in the mesh members due to capillary action.

[0042] Furthermore, it is preferable that at least the area of ​​the top wall 13 that faces the blades in the vertical direction (Z1-Z2) is made of a metal material. This allows the mesh member 20 and the top wall 13 to be more firmly fixed together. This also improves the thermal conductivity from the refrigerant flowing through the refrigerant flow path 11 to the top wall 13.

[0043] The mesh member 20 has through-holes 20a penetrating in the vertical direction (Z1-Z2). In this embodiment, the through-holes 20a extend in the arrangement direction (Y1-Y2). The through-holes 20a face the inlet 13a in the vertical direction (Z1-Z2). This allows the refrigerant to smoothly flow into the refrigerant flow path 11 through the inlet 13a and the through-holes 20a.

[0044] 7 is an enlarged perspective view of a portion of cold plate 10. Cold plate 10 further includes an elbow 15 and a refrigerant pipe 16. Elbow 15 is disposed on the upper surface of top wall 13 and is connected to refrigerant inlet 13a or outlet 13b of refrigerant flow path 11. Refrigerant pipe 16 is connected horizontally to elbow 15 by welding or brazing and extends along the upper surface of top wall 13.

[0045] The elbow 15 may be connected to both the inlet 13a and the outlet 13b, or to only one of them. At least the surface of the elbow 15 is made of a metal material with high thermal conductivity, such as copper or aluminum. That is, the elbow 15 may be made entirely of a metal material, or may be made of a resin material with the surface plated with a metal material. Plating the elbow 15 can improve its strength compared to a case where it is made of only a resin material. This improves the strength of the piping material around the inlet 13a and the outlet 13b, and can suppress refrigerant leakage around the inlet 13a and the outlet 13b.

[0046] The strength of the elbow 15 is improved by being made of a copper alloy. The elbow 15 may be made entirely of a copper alloy, or may be made of a resin member with the surface plated with a copper alloy. An example of a copper alloy is chromium copper. The strength of the elbow 15 is further improved by being made of chromium copper. For example, a chromium copper alloy in which 0.3 to 1.7 wt% of chromium is added to copper is preferably used. If the amount of chromium added to copper is less than 0.3 wt%, the strength of the elbow 15 decreases. If the amount of chromium added to copper is more than 1.7 wt%, the hardness increases and the workability of the metal decreases.

[0047] Plating processes for resin members include, for example, a degreasing process, an etching process, a neutralization process, a catalyst accelerator process, and an electroless plating process.

[0048] Furthermore, it is preferable that the metal member constituting elbow 15 is made of the same material as the metal member constituting top wall 13 or bottom wall 12. This reduces the potential difference that occurs between elbow 15 and top wall 13 or between elbow 15 and bottom wall 12 when refrigerant is circulated through cold plate 10. This therefore reduces corrosion of elbow 15, top wall 13, and bottom wall 12.

[0049] Furthermore, by using resin materials for the portions of elbow 15 that come into contact with the refrigerant, including the interior portion through which the refrigerant flows, it is possible to reduce the weight of elbow 15 and to suppress corrosion, thereby further suppressing refrigerant leakage around inlet 13a and outlet 13b.

[0050] The elbow 15 changes the flow direction of the refrigerant from the vertical direction (Z1-Z2) to the horizontal direction. The elbow 15 is fixed to the top wall 13 with, for example, a plurality of screws 15a. Although not shown, it is preferable to dispose a sealing member such as a rubber O-ring or rubber packing between the elbow 15 and the top wall 13. This can further prevent refrigerant leakage around the inlet 13a and the outlet 13b.

[0051] Furthermore, by providing elbow 15, refrigerant pipe 16 can be easily connected to inlet 13a and outlet 13b. Furthermore, by arranging refrigerant pipe 16 along the upper surface of top wall 13, cold plate 10 can be made smaller in the vertical direction (Z1-Z2). Note that by rotating elbow 15 about an axis in the vertical direction (Z1-Z2) and fixing it to top wall 13, the extension direction of refrigerant pipe 16 can be freely changed within the horizontal direction.

[0052] The refrigerant pipe 16 is connected to a pump (not shown) that circulates the refrigerant. When the pump is driven, the refrigerant circulates through the refrigerant flow path 11. The heat from the heat-generating component H is transferred to the bottom wall portion 12 of the cold plate 10. The heat transferred to the bottom wall portion 12 is then transferred to the refrigerant flowing through the refrigerant flow path 11. The refrigerant dissipates heat via a radiator (not shown). As a result, the temperature rise of the heat-generating component H can be suppressed.

[0053] 8 is a top view showing a modified example of the bottom wall 12 of the cold plate 10. The pillars 12b may be divided into multiple sections in the extension direction (X1-X2). In this case, it is preferable that at least a portion of the pillars 12b faces the sidewalls 14 extending in the extension direction (X1-X2) at the corners of the sidewalls 14 in the arrangement direction (Y1-Y2) with a gap therebetween, and also faces the sidewalls 14 extending in the arrangement direction (Y1-Y2) with a gap therebetween. This makes it possible to particularly prevent deformation of the blades 12a around the corners of the sidewalls 14.

[0054] <Other> 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, although the column portion 12b is in contact with the protrusion 13e in the vertical direction (Z1-Z2), the protrusion 13e may be omitted.

[0055] <Additional Notes> As described above, the cold plate (10) according to one embodiment of the present disclosure comprises a bottom wall portion (12) whose underside is in thermal contact with a heat-generating component (H), a top wall portion (13) covering the top surface of the bottom wall portion, a plurality of blades (12a) arranged in a line on the top surface of the bottom wall portion and extending linearly, a side wall portion (14) arranged between the bottom wall portion and the top wall portion and surrounding the blades to form a refrigerant flow path (11) through which a refrigerant flows, and a sheet-like mesh member (20) made of a metal member arranged between the top wall portion and the blades (first configuration).

[0056] In the first configuration, at least a region of the top wall portion that faces the blade in the up-down direction (Z1-Z2) may be made of a metal member (second configuration).

[0057] In the first or second configuration, the mesh member may be fixed to the ceiling wall portion via a welded portion or a brazed portion (third configuration).

[0058] In any of the first to third configurations, the mesh member may have an opening smaller than the gap between adjacent blades (fourth configuration).

[0059] In any of the first to fourth configurations, the mesh members may be arranged in a stacked manner in the vertical direction (fifth configuration).

[0060] In any of the first to fifth configurations, the mesh member may be in contact with the top wall portion and the blades (sixth configuration).

[0061] Furthermore, in any of the above first to sixth configurations, the device may further have a plurality of pillar portions (12b) protruding from the upper surface of the bottom wall portion and facing the blade in the extension direction on the inside of the side wall portion, with the upper ends of the pillar portions positioned at the same position as the upper ends of the blades or higher than the upper ends of the blades (seventh configuration).

[0062] In the seventh configuration, the column portion and the blade may face each other in the extending direction with a gap therebetween (eighth configuration).

[0063] Furthermore, any of the first to eighth configurations may further include an elbow (15) disposed on the upper surface of the ceiling wall portion and connected to the refrigerant inlet (13a) or outlet (13b) of the refrigerant flow path, and at least the surface of the elbow may be made of a metal member (ninth configuration).

[0064] 10 Cold Plate 11 refrigerant flow path 12 Bottom wall 12a blade 12b Column 13 Ceiling wall 13a Inlet 13b Outlet 13e Protrusion 14 Side wall 14a First side wall part 14b Second side wall part 15 Elbow 15a screw 16 Refrigerant pipe 20 Mesh material 20a Flow hole H Heat-generating parts

Claims

1. a bottom wall portion whose underside is in thermal contact with the heat-generating component; a top wall portion covering an upper surface of the bottom wall portion; a plurality of blades arranged side by side on an upper surface of the bottom wall portion and extending linearly; a side wall portion disposed between the bottom wall portion and the top wall portion, surrounding the blade to form a coolant flow path through which a coolant flows; a sheet-like mesh member made of a metal material, disposed between the top wall portion and the blades.

2. The cold plate according to claim 1 , wherein at least a region of the top wall portion that faces the blade in the vertical direction is made of a metal member.

3. 3. The cold plate according to claim 1, wherein the mesh member is fixed to the top wall portion via a welded portion or a brazed portion.

4. The cold plate according to claim 3 , wherein the mesh member has an opening smaller than a gap between adjacent blades.

5. The cold plate according to claim 4 , wherein a plurality of the mesh members are arranged in a stack in the vertical direction.

6. The cold plate of claim 5 , wherein the mesh member is in contact with the top wall portion and the blade.

7. the blade is further provided with a plurality of pillars projecting from an upper surface of the bottom wall portion and facing each other in an extending direction of the blade on the inside of the side wall portion, with the blade being sandwiched therebetween; 3. The cold plate according to claim 1, wherein the upper ends of the columns are located at the same position as the upper ends of the blades or higher than the upper ends of the blades.

8. The cold plate according to claim 7 , wherein the column portion and the blade face each other in the extending direction with a gap therebetween.

9. an elbow disposed on an upper surface of the top wall portion and connected to an inlet or an outlet of the refrigerant of the refrigerant flow path; 3. The cold plate according to claim 1, wherein at least a surface of the elbow is made of a metal member.

Images