Cold Plate

Abstract

A cold plate capable of reducing pressure loss of a refrigerant is provided. [Solution] The cold plate includes a bottom wall portion (12), a top wall portion (13), a side wall portion (14), an inlet (13a), an outlet (13b), and a blade group (15). The bottom wall portion has an underside that is in thermal contact with a heat-generating component. The top wall portion covers the upper surface of the bottom wall portion. The side wall portion connects the bottom wall portion and the top wall portion, forming a refrigerant flow path (11) through which a refrigerant flows. The inlet allows the refrigerant to flow from a refrigerant supply path (131) into the refrigerant flow path. The outlet allows the refrigerant to flow from the refrigerant flow path to a refrigerant discharge path (132). The blade group is arranged in the refrigerant flow path and is composed of multiple linearly extending blades arranged in a direction intersecting the extension direction of the blades, with multiple blades arranged side by side with gaps in between in the blade extension direction, and multiple inlets are arranged corresponding to each blade group.

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, side walls, an inlet, an outlet, and a blade group. The bottom wall has a lower surface that is in thermal contact with a heat-generating component. The top wall covers the upper surface of the bottom wall. The side wall connects the bottom wall and the top wall, forming a refrigerant flow path through which a refrigerant flows. The refrigerant flows into the refrigerant flow path through the inlet. The refrigerant flows out of the refrigerant flow path through the outlet. The blade group is arranged in the refrigerant flow path and is composed of multiple linearly extending blades arranged in a direction intersecting the extension direction. The inlet and outlet are arranged opposite each other across the blade group (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-79836 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a conventional cold plate, if the blade group is formed long in the blade extension direction, there is a possibility that the pressure loss when the coolant flows through the blade group will increase.

[0005] An object of the present invention is to provide a cold plate that can reduce the pressure loss of the refrigerant. [Means for solving the problem]

[0006] An exemplary cold plate of the present invention comprises a bottom wall, a top wall, a side wall, an inlet, an outlet, and a blade group. The bottom wall has an underside that is in thermal contact with a heat-generating component. The top wall covers an upper surface of the bottom wall. The side wall connects the bottom wall and the top wall, forming a refrigerant flow path through which a refrigerant flows. The refrigerant flows into the refrigerant flow path through the inlet. The refrigerant flows out of the refrigerant flow path through the outlet. The blade group is arranged in the refrigerant flow path and is composed of multiple linearly extending blades arranged in a direction intersecting the extension direction. Multiple blade groups are arranged side by side with gaps in the extension direction of the blades, and multiple inlet ports are arranged corresponding to each blade group. [Effects of the Invention]

[0007] According to an exemplary embodiment of the present invention, a cold plate capable of reducing pressure loss of a refrigerant 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 perspective view of a vertical cross section of a cold plate according to an embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view of a canopy portion of a cold plate according to an embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional perspective view of a canopy portion of a cold plate according to an embodiment of the present invention. [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. 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 151 of the cold plate 10 extend is referred to as the extension direction (X1-X2), and the direction in which the blades 151 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] <Overall structure of the cold plate> 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 a first embodiment of the present invention, and Fig. 2 is an exploded perspective view of the cold plate 10. Fig. 3 is a vertical cross-sectional perspective view of the cold plate 10. Fig. 4 is a perspective view of the top wall 13 as viewed from below Z2. Fig. 5 is a horizontal cross-sectional perspective view of the top wall 13. Fig. 6 is a top view of the bottom wall 12, in which the flow direction of the refrigerant is indicated by arrows, and the inlet 13a and outlet 13b are indicated by dashed lines.

[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 blade group 15, and an intermediate member 16. In this embodiment, the cold plate 10 is substantially rectangular in top view. More specifically, the bottom wall 12 and the top wall 13 are rectangular plates extending horizontally in top view, and the top wall 13 has two notched corners. Note that, although the bottom wall 12 and the top wall 13 in this embodiment are rectangular in top view, they are not limited to this and may be, for example, polygonal with multiple corners or circular in top view.

[0014] The bottom surface of the bottom wall 12 is in thermal contact with a heat-generating component (not shown) to be cooled, such as a CPU. The top wall 13 covers the top surface of the bottom wall 12. The bottom surface of the top wall 13 has a recess 13c recessed upward Z1 (see FIG. 4). The intermediate member 16 is disposed inside the recess 13c. This makes it easy to position the intermediate member 16.

[0015] The side wall 14 connects the bottom wall 12 and the top wall 13 to form a refrigerant flow path 11 through which a refrigerant flows. The refrigerant flow path 11 is formed in an internal space surrounded by the bottom wall 12, the top wall 13, and the side wall 14. 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.

[0016] In this embodiment, the side wall portion 14 has a first side wall portion 14a that protrudes upward Z1 from the upper surface of the bottom wall portion 12 and a second side wall portion 14b that protrudes downward Z2 from the lower surface of the top wall portion 13. The upper surface of the first side wall portion 14a and the lower surface of the second side wall portion 14b are joined. Note that, although the side wall portion 14 is composed of the first side wall portion 14a and the second side wall portion 14b in this embodiment, it may be composed of only one of them. That is, the upper surface of the first side wall portion 14a may be joined to the lower surface of the top wall portion 13 omitting the second side wall portion 14b, or the lower surface of the second side wall portion 14b may be joined to the upper surface of the bottom wall portion 12 omitting the first side wall portion 14a.

[0017] In addition, in this embodiment, the first side wall portion 14a is disposed on the periphery of the bottom wall portion 12, but may be disposed more inward than the periphery of the bottom wall portion 12 (on the side closer to the blade group 15). In addition, in this embodiment, the second side wall portion 14b is disposed on the periphery of the top wall portion 13, but may be disposed more inward than the periphery of the top wall portion 13 (on the side closer to the blade group 15).

[0018] The first side wall portion 14a has a first screw hole 21 that penetrates in the vertical direction (Z1-Z2), and the second side wall portion 14b has a second screw hole 22 that is recessed upward Z1 (see FIG. 4). A plurality of the first screw holes 21 and second screw holes 22 are arranged surrounding the refrigerant flow path 11. The bottom wall portion 12 and the top wall portion 13 are fixed together by aligning the first screw hole 21 and the second screw hole 22 and fastening them with screws 23.

[0019] The blade group 15 is arranged in the refrigerant flow path 11 and is configured by arranging a plurality of linearly extending blades 151 in a direction (Y1-Y2) intersecting the extension direction (X1-X2). The blade group 15 is arranged side by side with gaps between them in the extension direction (X1-X2) of the blades 151. In this embodiment, two blade groups 15 are arranged side by side, but three or more blade groups 15 may be arranged side by side with gaps between them in the extension direction (X1-X2) of the blades 151.

[0020] The blades 151 are arranged side by side on the upper surface of the bottom wall 12, and in this embodiment, the blades 151 are made of the same material as the bottom wall 12. The blades 151 are formed, for example, by cutting the upper surface of the bottom wall 12. This improves the thermal conductivity from the bottom wall 12 to the refrigerant flowing through the refrigerant flow path 11 via the blades 151. The blades 151 may be made of a different material from the bottom wall 12. For example, the blades 151 may be formed on a plate-shaped base member, and the bottom wall 12 and the base member may be welded to each other.

[0021] The intermediate member 16 is disposed between the top wall portion 13 and each blade group 15. The intermediate member 16 is made of, for example, a sheet-like rubber. The intermediate member 16 has through-holes 16a penetrating in the up-down direction (Z1-Z2). In this embodiment, the through-holes 16a extend in the arrangement direction (Y1-Y2). The through-holes 16a face the inlets 13a (described later) in the up-down direction (Z1-Z2). The width of the through-holes 16a in the arrangement direction (Y1-Y2) is the same as the width of the inlets 13a in the arrangement direction (Y1-Y2), and the width of the blade group 15 in the arrangement direction (Y1-Y2) is greater than the width of the inlets 13a in the arrangement direction (Y1-Y2). This allows the refrigerant to smoothly flow into each blade group 15 through the inlets 13a and the through-holes 16a.

[0022] The upper surface of the intermediate member 16 contacts the top wall portion 13, and the lower surface of the intermediate member 16 contacts each blade group 15. By disposing the intermediate member 16, the gap between the top wall portion 13 and the blades 151 in the vertical direction (Z1-Z2) is blocked. This prevents the refrigerant flowing between adjacent blades 151 in each blade group 15 from flowing into the gap between the top wall portion 13 and the blades 151 in the vertical direction (Z1-Z2). This further improves the thermal conductivity from the bottom wall portion 12 to the refrigerant flowing through the refrigerant flow path 11 via the blades 151. Note that the intermediate member 16 may be made of a resin sheet instead of rubber.

[0023] When the pump is driven, the refrigerant circulates through the refrigerant flow path 11. Heat from heat-generating components (not shown) 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). In this way, the heat-generating components can be cooled.

[0024] <Detailed explanation of the ceiling wall> The cold plate 10 further includes an inlet 13a through which the refrigerant flows into the refrigerant flow path 11, an outlet 13b through which the refrigerant flows out of the refrigerant flow path 11, a refrigerant supply path 131, and a refrigerant discharge path 132 (see FIG. 3).

[0025] In this embodiment, the inlet 13a, the outlet 13b, the refrigerant supply passage 131, and the refrigerant discharge passage 132 are formed in the top wall portion 13. The refrigerant discharge passage 132 extends linearly on an extension of the linearly extending refrigerant supply passage 131. The inlet 13a and the outlet 13b open on the lower surface of the top wall portion 13, and multiple inlets 13a are arranged corresponding to each blade group 15.

[0026] The refrigerant that flows into the refrigerant flow path 11 from each inlet 13a flows through each blade group 15 toward the outlet 13b. In this embodiment, the gap between adjacent blade groups 15 in the extension direction (X1-X2) and the gap between the blade groups 15 and the side wall portion 14 in the arrangement direction (Y1-Y2) are larger than the gap between adjacent blades 151 in the arrangement direction (Y1-Y2) (see FIG. 6). In addition, the gap between adjacent blade groups 15 in the extension direction (X1-X2) is larger than the width of the inlet 13a in the extension direction (X1-X2).

[0027] Therefore, the flow resistance between adjacent blades 151 in the arrangement direction (Y1-Y2) is higher than the flow resistance on the outside of each blade group 15. As a result, the refrigerant that passes through each blade group 15 from each inlet 13a flows through the gaps between adjacent blade groups 15 and flows outside the blade group 15 with lower flow resistance toward the outlet 13b. The refrigerant also flows through the gaps between adjacent blade groups 15.

[0028] As a result, by arranging the blade group 15 in multiple sections in the extension direction (X1-X2) and providing multiple inlets 13a corresponding to each blade group 15, the circulation distance of the coolant flowing through the blade group 15 can be shortened compared to when one long blade group 15 is arranged in the extension direction (X1-X2) and one corresponding inlet 13a is provided. This reduces the pressure loss of the coolant throughout the entire coolant flow path 11. This also reduces the power consumption of the pump that circulates the coolant through the coolant flow path 11.

[0029] Furthermore, heat from the heat-generating components is transferred to the lower surface of the bottom wall portion 12 and then transferred to the coolant flowing through the coolant flow path 11 via each blade group 15. At this time, coolant of the same temperature is supplied from each inlet 13a to each blade group 15. Therefore, the cooling effect in each blade group 15 can be made uniform.

[0030] Furthermore, inlet 13a is disposed opposite in the up-down direction (Z1-Z2) to the center of blade 151 in the extension direction (X1-X2) (see FIG. 6). The refrigerant that flows into refrigerant flow path 11 from inlet 13a branches and flows to both sides in the extension direction (X1-X2) of blade 151 (see FIG. 6). At this time, in each blade group 15, the distance that the refrigerant flowing in one extension direction X1 passes through blade 151 is the same as the distance that the refrigerant flowing in the other extension direction X2 passes through blade 151.

[0031] As a result, the flow resistance of the coolant flowing in one direction X1 of the extension direction is the same as the flow resistance of the coolant flowing in the other direction X2 of the extension direction. Therefore, the amount of coolant branching and flowing on both sides of the extension direction (X1-X2) is equal. This makes it possible to uniformize the cooling effect of each blade group 15 in the extension direction (X1-X2).

[0032] Furthermore, for example, when inlet 13a is disposed opposite the other X2 end of blade 151 in the up-down direction (Z1-Z2), the refrigerant flows from the other X2 end to the one X1 end of blade 151. At this time, the flow distance of the refrigerant flowing through blade group 15 becomes longer, and the temperature difference between the upstream side and the downstream side in the flow direction of the refrigerant becomes larger. Therefore, by disposing inlet 13a opposite the center of blade 151 in the extension direction (X1-X2) in the up-down direction (Z1-Z2), the cooling effect of each blade group 15 in the extension direction (X1-X2) can be made more uniform.

[0033] The inlet 13a extends in the arrangement direction (Y1-Y2) of the blades 151 (see FIGS. 5 and 6). The inlet 13a is connected to the refrigerant supply channel 131 at an end on one side Y1 of the arrangement direction of the blades 151. The refrigerant flows from the end on one side Y1 of the arrangement direction of the inlet 13a to the other side Y2 of the arrangement direction, and then flows between the blades 151 aligned in the arrangement direction (Y1-Y2). This allows the refrigerant supply channel 131 and the inlet 13a to be simplified in shape and arranged compactly inside the top wall portion 13, compared to when the refrigerant is branched from the inlet 13a to both sides in the arrangement direction (Y1-Y2), thereby enabling the cold plate 10 to be made smaller.

[0034] Outlet 13b is disposed at one location in refrigerant flow path 11, at an end in the extension direction (X1-X2) of blade 151. Outlet 13b is connected to refrigerant discharge path 132. By locating outlet 13b at the end of refrigerant flow path 11 in the extension direction (X1-X2) of blade 151, collision of refrigerant passing through blade group 15 toward outlet 13b around outlet 13b can be reduced. This further reduces refrigerant pressure loss throughout refrigerant flow path 11. Furthermore, by locating outlet 13b at one location, the refrigerant pipe connected to outlet 13b can be simplified, thereby further reducing the overall size of cold plate 10 and the manufacturing costs of cold plate 10.

[0035] The refrigerant supply path 131 supplies the refrigerant to the refrigerant flow path 11 via the inlet 13a. The refrigerant discharge path 132 is connected to the outlet 13b and discharges the refrigerant from the refrigerant flow path 11. In this embodiment, the refrigerant supply path 131 and the refrigerant discharge path 132 are formed by cutting the interior of the top wall portion 13 into a cylindrical shape and are formed integrally with the top wall portion 13. The upstream end of the refrigerant supply path 131 in the flow direction of the refrigerant opens to the side wall portion 14. The downstream end of the refrigerant discharge path 132 in the flow direction of the refrigerant opens to the side wall portion 14. In this embodiment, the ends of the refrigerant supply path 131 and the refrigerant discharge path 132 open to the second side wall portion 14b.

[0036] Forming the refrigerant supply path 131 and the refrigerant discharge path 132 integrally with the top wall 13 reduces the manufacturing cost of the cold plate 10. Furthermore, by arranging the refrigerant supply path 131 and the refrigerant discharge path 132 inside the top wall 13, the upper surface of the top wall 13 can be flattened, thereby reducing the size of the cold plate 10 in the vertical direction (Z1-Z2). This allows the cold plate 10 to be easily attached to an actual device having heat-generating components.

[0037] The upstream ends of the refrigerant supply path 131 and the refrigerant discharge path 132 in the refrigerant flow direction open to the side wall 14, and are connected to a pump (not shown) via a refrigerant pipe (not shown) connected to an elbow 17 (see FIG. 1). This allows the cold plate 10 to be more compact in the vertical direction (Z1-Z2).

[0038] Additionally, the refrigerant supply passage 131 extends in a direction away from the outlet 13b along the blade extension direction (X1-X2). This allows the refrigerant that flows from the refrigerant supply passage 131 into the refrigerant flow path 11 to pass through each blade group 15 and flow smoothly toward the outlet 13b. This further reduces the pressure loss of the refrigerant throughout the refrigerant flow path 11.

[0039] Furthermore, the refrigerant discharge path 132 extends in a direction away from the inlet 13a along the extending direction (X1-X2) of the blades. This allows the refrigerant flowing along the extending direction (X1-X2) of the blades to be smoothly discharged through the outlet 13b to the refrigerant discharge path 132. This further reduces the pressure loss of the refrigerant throughout the entire refrigerant flow path 11.

[0040] Furthermore, the refrigerant supply passage 131 branches inside the top wall 13 and is connected to each inlet 13a. By branching from the refrigerant supply passage 131 and supplying the refrigerant to each inlet 13a, it is possible to suppress variations in the temperature of the refrigerant flowing into each inlet 13a, thereby more uniformly cooling each blade group 15. Furthermore, by branching the refrigerant supply passage 131 inside the top wall 13, components such as refrigerant pipes connected to the cold plate 10 can be simplified, thereby making the entire cold plate 10 more compact and reducing the manufacturing cost of the cold plate 10.

[0041] In this embodiment, the refrigerant supply path 131 and the refrigerant discharge path 132 are formed integrally with the top wall portion 13, but they may also be formed as separate members from the top wall portion 13. For example, an inlet 13a and an outlet 13b may be formed to penetrate the top wall portion 13 in the vertical direction (Z1-Z2), and the inlet 13a and the outlet 13b may be connected to a refrigerant pipe (not shown) via an elbow. In this case, the refrigerant pipe is disposed on the upper surface of the top wall portion 13, and the refrigerant supply path 131 and the refrigerant discharge path 132 are formed inside the refrigerant pipe. Alternatively, the refrigerant pipe may be incorporated inside the top wall portion 13 to form the refrigerant supply path 131 and the refrigerant discharge path 132.

[0042] <Other> The above-described embodiment is merely an example of the present invention. The configuration of the embodiment may be modified as appropriate without departing from the technical spirit of the present invention. Furthermore, the embodiments may be combined as much as possible. For example, in this embodiment, the inlet 13a is connected to the refrigerant supply channel 131 at the end of one side Y1 in the arrangement direction of the blades 151, but it may also be connected to the refrigerant supply channel 131 at the center of the arrangement direction (Y1-Y2) of the blades 151.

[0043] <Additional Notes> As described above, a cold plate (10) according to one embodiment of the present disclosure includes a bottom wall portion (12) whose underside is in thermal contact with a heat-generating component, a top wall portion (13) that covers the upper surface of the bottom wall portion, a side wall portion (14) that connects the bottom wall portion and the top wall portion and forms a refrigerant flow path (11) through which a refrigerant flows, an inlet (13a) through which the refrigerant flows into the refrigerant flow path, an outlet (13b) through which the refrigerant flows out of the refrigerant flow path, and a blade group (15) arranged in the refrigerant flow path and configured by a plurality of linearly extending blades (151) arranged in a direction intersecting the extension direction (X1-X2), wherein the blade group is arranged in a row with gaps between them in the blade extension direction (X1-X2), and a plurality of the inlet ports are arranged corresponding to each of the blade groups (first configuration).

[0044] In the first configuration, the outlet may be disposed at one location on the coolant channel at an end in the extending direction (X1-X2) of the blade (second configuration).

[0045] In addition, the first or second configuration may further include a refrigerant supply path (131) that supplies the refrigerant to the refrigerant flow path, and the refrigerant supply path may be branched and connected to each of the inlets (third configuration).

[0046] In addition, in any of the above first to third configurations, the refrigerant supply path may be formed integrally with the ceiling wall portion, and the upstream end of the refrigerant supply path in the flow direction of the refrigerant may open to the side wall portion (fourth configuration).

[0047] In any one of the first to fourth configurations, the coolant supply passage may extend in a direction away from the outlet along the extending direction of the blade (fifth configuration).

[0048] In addition, in any of the above first to fifth configurations, the inlet may extend in the arrangement direction (Y1-Y2) of the blades and be connected to the refrigerant supply path at one end in the arrangement direction of the blades (sixth configuration).

[0049] Furthermore, any of the first to sixth configurations may further include a refrigerant discharge path (132) that discharges the refrigerant from the refrigerant flow path, and the refrigerant discharge path may be connected to the outlet and extend in a direction away from the inlet along the extension direction of the blade (seventh configuration).

[0050] In any of the first to seventh configurations, the inlet may be arranged opposite the center of the blade in the extending direction in the up-down direction (Z1-Z2) (eighth configuration). [Explanation of symbols]

[0051] 10 Cold Plate 11 refrigerant flow path 12 Bottom wall 13 Ceiling wall 13a Inlet 13b Outlet 13c Recess 14 Side wall 14a First side wall part 14b Second side wall part 15 blades 16 Intermediate parts 16a Flow hole 17 Elbow 21 First screw hole 22 Second screw hole 23 screws 131 Refrigerant supply path 132 Refrigerant discharge path 151 Blade X1―X2 Extending direction Y1-Y2 array direction Z1-Z2 Vertical direction

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 side wall portion connecting the bottom wall portion and the top wall portion and forming a refrigerant flow path through which a refrigerant flows; an inlet through which the refrigerant flows into the refrigerant flow path; an outlet through which the refrigerant flows out of the refrigerant flow path; a blade group arranged in the refrigerant flow path and including a plurality of linearly extending blades arranged in a direction intersecting the extending direction of the blades; The blade group includes a plurality of blades arranged side by side with gaps in the extending direction of the blades, The cold plate has a plurality of inlets arranged corresponding to the respective blade groups.

2. The cold plate according to claim 1 , wherein the outlet is disposed at one end of the coolant flow path in the extending direction of the blade.

3. a coolant supply passage for supplying the coolant to the coolant flow passage; 3. The cold plate according to claim 1, wherein the coolant supply path branches and is connected to each of the inlets.

4. the refrigerant supply passage is formed integrally with the ceiling wall portion, The cold plate according to claim 3 , wherein an upstream end of the coolant supply passage in a flow direction of the coolant opens into the side wall portion.

5. The cold plate of claim 3 , wherein the coolant supply passage extends in a direction away from the outlet along an extension direction of the blade.

6. The cold plate according to claim 3 , wherein the inlet extends in an arrangement direction of the blades and is connected to the coolant supply passage at one end in the arrangement direction of the blades.

7. a coolant discharge path for discharging the coolant from the coolant flow path; 3. The cold plate according to claim 1, wherein the coolant discharge passage is connected to the outlet and extends in a direction away from the inlet along the extension direction of the blade.

8. a coolant discharge path for discharging the coolant from the coolant flow path; The cold plate according to claim 3 , wherein the coolant discharge passage is connected to the outlet and extends in a direction away from the inlet along the extension direction of the blade.

9. The cold plate according to claim 1 or 2, wherein the inlet is disposed opposite to a center portion of the blade in an extending direction of the blade in the up-down direction.

Images