Cold plate

Abstract

To provide a cold plate capable of suppressing deformation of blades at the time of manufacturing.SOLUTION: A cold plate 10 includes a bottom wall 12, a top wall 13, a plurality of blades 12a, and a side wall 14. The bottom wall 12 has a lower surface in thermal contact with a heat generating component H. The top wall 13 covers an upper surface of the bottom wall 12. The blades 12a are arranged side by side on the upper surface of the bottom wall 12, and they extend linearly. The side wall 14 is located between the bottom wall 12 and the top wall 13, and defines a refrigerant flow path 11 which surrounds the blades 12a and inside of which a refrigerant flows. The bottom wall 12 has a plurality of column portions. The column portions protrude from the upper surface, and they oppose each other in the extending direction of the blades 12a across the blades 12a inside the side wall 14. Upper ends of the column portions are located at the same position as upper ends of the blades 12a or above the upper ends of the blades 12a.SELECTED DRAWING: Figure 3

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 comprises a bottom wall, a top wall, a plurality of blades, and a side wall. The bottom wall has an underside that 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 arranged between the bottom wall and the top wall and surrounds the blades to form a coolant flow path through which a coolant flows. The bottom wall has a plurality of pillars. The pillars protrude from the top surface of the bottom wall and face the blades in the extension direction inside the side wall, sandwiching the blades therebetween. The top ends of the pillars are located at the same position as the top ends of the blades or higher than the top ends of 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 a first embodiment of the present invention. [Figure 2] FIG. 2 is a top view of the cold plate according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 5] FIG. 5 is a top view of the bottom wall portion of the cold plate according to the first embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged perspective view of a portion of the cold plate according to the first embodiment of the present invention. [Figure 7] FIG. 7 is a top view showing a modified example of the bottom wall portion of the cold plate according to the first embodiment of the present invention. [Figure 8] FIG. 8 is an exploded perspective view of a cold plate according to a second embodiment of the present invention. [Figure 9] FIG. 9 is a perspective view of an intermediate lid portion of a cold plate according to a second embodiment of the present invention. [Figure 10] FIG. 10 is a top view of a cold plate according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view taken along line CC in FIG. [Figure 12] FIG. 12 is a cross-sectional view taken along line DD in FIG. 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] First Embodiment 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 a top view of the cold plate 10. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2, and Fig. 4 is a cross-sectional view taken along line BB in Fig. 2. Fig. 5 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, side walls 14, a blade 12a, and a buffer material 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 bottom surface of the bottom wall 12 is in thermal contact with a heat-generating component H to be cooled, such as a CPU (see FIG. 3). The top wall 13 covers the upper surface of the bottom wall 12. The top wall 13 also has a protrusion 13c protruding from the bottom surface. The protrusion 13c is in contact with the column portions 12b (described later) in the up-down direction (Z1-Z2). In this embodiment, the protrusion 13c extends in the arrangement direction (Y1-Y2). The protrusion 13c and the side wall 14 face each other in the extension direction (X1-X2) and the arrangement direction (Y1-Y2) via a gap. The protrusion 13c improves the strength of the top wall 13.

[0015] 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.

[0016] The side wall portion 14 has a first side wall portion 14a that protrudes upward (Z1) from the periphery of the bottom wall portion 12 and a second side wall portion 14b that protrudes downward (Z2) from the periphery 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. In this embodiment, the side wall portion 14 is composed of the first side wall portion 14a and the second side wall portion 14b, but 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 without 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 without the first side wall portion 14a.

[0017] 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.

[0018] 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.

[0019] 6 is an enlarged perspective view of a portion of cold plate 10. Cold plate 10 further includes a metal 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.

[0020] The elbow 15 may be connected to both the inlet 13a and the outlet 13b, or to only one of them. The elbow 15 is made of a metal with high thermal conductivity, such as copper or aluminum. The elbow 15 changes the flow direction of the refrigerant from the vertical direction (Z1-Z2) to the horizontal direction. The elbow 15 is fastened to the top wall 13, for example, with a plurality of screws 15a. Although not shown, it is preferable to place a sealing member, such as a rubber O-ring or rubber packing, between the elbow 15 and the top wall 13. This can prevent refrigerant leakage around the inlet 13a and the outlet 13b.

[0021] The provision of elbow 15 allows refrigerant pipe 16 to be easily connected to inlet 13a and outlet 13b. It also improves the strength of the piping around inlet 13a and outlet 13b. Arranging refrigerant pipe 16 along the upper surface of top wall 13 also allows cold plate 10 to be downsized in the vertical direction (Z1-Z2). 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.

[0022] 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.

[0023] 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.

[0024] The multiple 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. 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).

[0025] 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.

[0026] 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).

[0027] 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 coming into contact with the blades 12a, which would otherwise cause deformation of the blades 12a. The upper ends of the pillar portions 12b are located higher (Z1) than the upper ends of the blades 12a, making it easier for the top wall portion 13 to come into contact with the pillar portions 12b than with the blades 12a. This reduces contact between the top wall portion 13 and the blades 12a. This prevents deformation of the blades 12a during manufacturing. This provides a cold plate 10 that can prevent a decrease in 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.

[0028] Providing protrusions 13c that come into contact with column portions 12b on top wall portion 13 improves the strength of top wall portion 13 and suppresses deflection of top wall portion 13. This further prevents blade 12a from being deformed due to contact between top wall portion 13 and blade 12a.

[0029] 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.

[0030] The cushioning material 20 is a sheet-like cushioning material arranged between the top wall portion 13 and the blade 12a. The cushioning material 20 is, for example, a mesh member in which a plurality of metal wire members are woven, and has voids (not shown) that form refrigerant flow paths. The cushioning material 20 has through-holes 20a that penetrate 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.

[0031] By disposing the buffer material 20, it is possible to prevent the top wall portion 13 and the blades 12a from coming into contact with each other, thereby preventing deformation of the blades 112a. In addition, it is possible to allow the refrigerant to smoothly flow into the refrigerant flow path 111 through the inlet 113a and the flow holes 20a.

[0032] 7 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.

[0033] Second Embodiment Next, a second embodiment of the present invention will be described. Fig. 8 is an exploded perspective view of a cold plate 110 according to the second embodiment of the present invention. Fig. 9 is a perspective view of an intermediate lid portion 115, showing the intermediate lid portion 115 from below. Fig. 10 is a top view of the cold plate 110, and Fig. 11 is a cross section taken along line CC in Fig. 10. Fig. 12 is a cross section taken along line DD in Fig. 10. In Fig. 8, the seal member 116 is indicated by a dashed line. In Figs. 8 to 12, the elbow 15 and the refrigerant pipe 16 are omitted.

[0034] The cold plate 110 of the second embodiment further includes a plate-shaped intermediate lid 115 disposed between the top wall 13 and the side wall 115a. The top wall 13 and the intermediate lid 115 are in contact with each other via an annular sealing member 116 that surrounds the through-hole 115b and the recess 115c. The provision of the sealing member 116 improves the sealing performance of the inside of the refrigerant channel 111. An example of the sealing member is a rubber packing.

[0035] In this embodiment, the side wall 115a protrudes downward (Z2) from the lower surface of the intermediate lid portion 115, and the lower surface is joined to the upper surface of the bottom wall portion 112. The side wall 115a may also protrude from the upper surface of the bottom wall portion 112. The side wall 115a may also be divided in the vertical direction (Z1-Z2) and disposed on the intermediate lid portion 115 and the bottom wall portion 112, respectively.

[0036] As in the first embodiment, the pillars 112b of this embodiment can improve the strength of the bottom wall 112 and suppress the bending of the bottom wall 112. This can reduce the deformation of the blades 112a.

[0037] Specifically, when joining the intermediate lid part 115 to the bottom wall part 112, the pillar part 112b supports the intermediate lid part 115. This prevents the intermediate lid part 115 and the blade 112a from coming into contact with each other and causing deformation of the blade 112a. Furthermore, the upper end of the pillar part 112b is located higher (Z1) than the upper end of the blade 112a, so that the intermediate lid part 115 is more likely to come into contact with the pillar part 112b than with the blade 112a. This reduces contact between the intermediate lid part 115 and the blade 112a. The upper end of the pillar part 112b may be located at the same position as the upper end of the blade 112a.

[0038] The intermediate lid portion 115 has a through-hole 115b, a recess 115c, and intermediate protrusions 115d and 115e. The through-hole 115b is surrounded by the side wall portion 115a and penetrates in the up-down direction (Z1-Z2). In this embodiment, the through-hole 115b has a rectangular shape when viewed from above, but the present invention is not limited to this.

[0039] The refrigerant flowing in through inlet 113a flows into refrigerant channel 111 through through-hole 115b. Refrigerant channel 111 is formed in an internal space surrounded by bottom wall 112, intermediate lid 115, and side wall 115a. By providing intermediate lid 115, the shape of refrigerant channel 111 can be easily designed.

[0040] The top wall 13 has a top wall protrusion 113d that protrudes from the lower surface into the through-hole 115b and through which the inlet 113a passes. A sheet-like buffer material 120 is disposed between the top wall protrusion 113d and the blade 112a. The buffer material 120 has through-holes 120a that pass through in the vertical direction (Z1-Z2). In this embodiment, the through-holes 120a extend in the arrangement direction (Y1-Y2).

[0041] By providing the buffer material 120, contact between the top wall protrusion 113d and the blade 112a can be prevented, thereby preventing deformation of the blade 112a. Also, the refrigerant can smoothly flow into the refrigerant flow path 111 through the inlet 113a and the flow hole 120a.

[0042] The intermediate protrusions 115d and 115e are disposed inside the side wall 115a, protrude from the underside of the intermediate lid 115, and contact the column 112b in the up-down direction (Z1-Z2). The intermediate protrusions 115d and 115e are disposed opposite each other in the extension direction (X1-X2) with the through-hole 115b in between. The intermediate protrusion 115e is disposed on the opposite side (X2) in the extension direction from the recess 115c with the through-hole 115b in between.

[0043] Intermediate protrusions 115d and 115e are each disposed away from the periphery of through-hole 115b in the extension direction (X1-X2) (see FIG. 12). Furthermore, the end of blade 112a in the extension direction (X1-X2) overlaps with the periphery of through-hole 115b in top view. This allows blade 112a to be extended in the extension direction (X1-X2), thereby improving the cooling effect of cold plate 110.

[0044] Furthermore, the ends of the blades 112a in the extension direction (X1-X2) and the periphery of the through-holes 115b face each other in the up-down direction (Z1-Z2) with a gap between them. This allows the refrigerant flowing in the extension direction (X1-X2) along the blades 112a to flow smoothly through the ends of the blades 112a in the extension direction (X1) and head toward the column portions 112b. This makes it possible to suppress an increase in the flow resistance of the refrigerant.

[0045] In this embodiment, the intermediate protrusions 115d and 115e extend in the arrangement direction (Y1-Y2). The intermediate protrusions 115d and 115e face the side wall 115a extending in the extension direction (X1-X2) with a gap in between. The intermediate protrusions 115d and 115e face the side wall 115a extending in the arrangement direction (Y1-Y2) with a gap in between. The provision of the intermediate protrusions 115d and 115e improves the strength of the intermediate lid portion 115. This further prevents deformation of the blade 112a when joining the intermediate lid portion 115 and the bottom wall portion 112.

[0046] A portion of seal member 116 is disposed on the upper surface of intermediate lid portion 115, between intermediate protrusion 115e and the periphery of through-hole 115b (see FIG. 12). This narrows the area surrounded by seal member 116, reducing the capacity of refrigerant flow path 111 and preventing cold plate 110 from becoming large.

[0047] The seal member 116 is disposed inside a groove 113c formed in the lower surface of the top wall portion 113. This facilitates positioning of the seal member 116, and the manufacturing efficiency of the cold plate 110 can be further improved.

[0048] In this embodiment, recess 115c is disposed adjacent to through-hole 115b in the extension direction (X1), and its upper surface is recessed downward (Z2) and covered by top wall 113. Outlet 113b of top wall 113 is disposed opposite recess 115c in the up-down direction (Z1-Z2). Refrigerant flow path 111 extends from the internal space surrounded by bottom wall 112, intermediate lid 115, and side wall 115a to the internal space surrounded by recess 115c and top wall 113.

[0049] As a result, the refrigerant that flows through the refrigerant flow path 111 surrounded by the bottom wall portion 112, the intermediate lid portion 115, and the side wall portion 115a flows upward (Z1) between the outer peripheral surface of the top wall protrusion portion 113d and the inner peripheral surface of the through-hole 115b. The refrigerant also flows over the periphery of the through-hole 115b and into the recess 115c. The refrigerant that flows into the recess 115c is discharged through the outlet 113b. By expanding the intermediate lid portion 115 to provide the recess 115c, the cooling area can be expanded. This allows the heat-generating components arranged around the heat-generating component H to be cooled.

[0050] In this embodiment, the refrigerant flow path 111 in the internal space surrounded by the recess 115c and the top wall 113 has a narrower width in the arrangement direction (Y1-Y2) than the refrigerant flow path 111 in the internal space surrounded by the bottom wall 112, the intermediate lid 115, and the side wall 115a. More specifically, the refrigerant flow path 111 in the internal space surrounded by the recess 115c and the top wall 113 has a narrower width in the arrangement direction (Y1-Y2) as it moves away from the through-hole 115b in the extension direction (X1). This allows the refrigerant to flow smoothly toward the outlet 113b.

[0051] <Other> The above-described embodiments are merely examples of the present invention. The configuration of the embodiments may be modified as appropriate without departing from the technical spirit of the present invention. Furthermore, the embodiments may be combined to the extent possible. For example, in the first embodiment, the pillar portion 12b contacts the protrusion portion 13c in the vertical direction (Z1-Z2), but the protrusion portion 13c may be omitted. In this case, it is preferable that the upper surface of the pillar portion 12b contacts the lower surface of the top wall portion 13. In the second embodiment, the pillar portion 112b contacts the intermediate protrusions 115d and 115e in the vertical direction (Z1-Z2), but the intermediate protrusions 115d and 115e may be omitted. In this case, it is preferable that the upper surface of the pillar portion 112b contacts the lower surface of the intermediate lid portion 115.

[0052] <Additional Notes> As described above, a 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 upper surface of the bottom wall portion, a plurality of blades (12a) arranged in a line on the upper surface of the bottom wall portion and extending linearly, and 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, the bottom wall portion having a plurality of pillar portions (12b) protruding from its upper surface and facing the blades in the extension direction (X1-X2) inside the side wall portion, with the blades sandwiched between them, and the upper ends of the pillar portions are positioned at the same position as the upper ends of the blades or higher than the upper ends of the blades (first configuration).

[0053] In the first configuration, the pillar portion may extend in the arrangement direction (Y1-Y2) of the blades (second configuration).

[0054] In addition, in the first or second configuration, the top wall portion may have a protrusion (13c) that protrudes from the lower surface and contacts the column portion in the vertical direction (Z1-Z2) (third configuration).

[0055] Furthermore, in any of the above first to third configurations, the side wall portion may be rectangular and annular when viewed from above, and at least a portion of the column portion may be configured to face the side wall portion extending in the extension direction at a corner of the side wall portion in the arrangement direction with a gap therebetween, and to face the side wall portion extending in the arrangement direction in the extension direction with a gap therebetween (fourth configuration).

[0056] Furthermore, any of the first to fourth configurations may further include a plate-shaped intermediate lid portion (115) arranged between the top wall portion and the side wall portion, the intermediate lid portion having a through hole (115b) that is surrounded by the side wall portion and penetrates in the vertical direction, the top wall portion having an inlet (113a) through which the refrigerant flows in, and the refrigerant that flows in through the inlet flows into the refrigerant flow path through the through hole (fifth configuration).

[0057] Furthermore, in any of the above first to fifth configurations, the intermediate lid portion may further have an intermediate protrusion (115d, 115e) that is arranged inside the side wall portion, protrudes from the underside, and contacts the column portion in the vertical direction (Z1-Z2), the intermediate protrusion is arranged away from the periphery of the through hole in the extension direction, the top wall portion and the intermediate lid portion contact via an annular sealing member (116) that surrounds the through hole, and a portion of the sealing member is arranged on the upper surface of the intermediate lid portion between the intermediate protrusion and the periphery of the through hole (sixth configuration).

[0058] In any of the first to sixth configurations, an end of the blade in the extending direction may overlap the periphery of the through-hole in a top view (seventh configuration).

[0059] In any of the first to seventh configurations, the end of the blade in the extending direction and the periphery of the through-hole may be configured to face each other in the vertical direction with a gap interposed therebetween (eighth configuration).

[0060] In addition, in any of the above first to eighth configurations, the top wall portion may have a top wall protrusion (113d) that protrudes from the lower surface into the through hole and through which the inlet passes, and a sheet-like buffer material (120) may be arranged between the top wall protrusion and the blade (ninth configuration).

[0061] Furthermore, in any of the above first to ninth configurations, the intermediate lid portion may be arranged adjacent to the through hole in the extension direction, and have a recess (115c) whose upper surface is recessed downward and covered by the top wall portion, the top wall portion is arranged opposite the recess in the vertical direction, and has an outlet (113b) through which the refrigerant flows out, the refrigerant flow path extends from an internal space surrounded by the bottom wall portion, the intermediate lid portion, and the side wall portion to an internal space surrounded by the recess and the top wall portion, the sealing member surrounds the through hole and the recess, and a portion of the sealing member is arranged between the intermediate protrusion portion, which is arranged on the opposite side of the through hole from the recess in the extension direction, and the periphery of the through hole (tenth configuration).

[0062] In addition, in any of the above first to tenth configurations, the refrigerant flow path in the internal space surrounded by the recess and the top wall portion may be configured to have a narrower width in the arrangement direction than the refrigerant flow path in the internal space surrounded by the bottom wall portion, the intermediate lid portion, and the side wall portion (eleventh configuration).

[0063] In addition, in any of the above first to eleventh configurations, the refrigerant flow path in the internal space surrounded by the recess and the ceiling wall portion may be configured so that its width in the arrangement direction narrows as it moves away from the through hole in the extension direction (twelfth configuration).

[0064] Furthermore, any of the first to twelfth configurations may further include a metal 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 a refrigerant pipe (16) connected to the elbow by welding or brazing and extending along the upper surface of the ceiling wall portion (a thirteenth configuration). [Explanation of symbols]

[0065] 10, 110 Cold plate 11, 111 Refrigerant flow path 12, 112 Bottom wall 12a, 112a blades 12b, 112b pillar part 13, 113 Ceiling wall 13a, 113a inlet 13b, 113b outlet 13c Protrusion 14, 115a Side wall part 14a First side wall part 14b Second side wall part 15 Elbow 15a screw 16 Refrigerant pipe 20, 120 buffer material 20a, 120a circulation hole 113c Groove 113d Ceiling wall protrusion 115 Intermediate lid part 115b Through hole 115c recess 115d, 115e intermediate protrusion 116 Sealing material 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; Equipped with The bottom wall portion is a plurality of pillars protruding from the upper surface and facing each other in the extending direction of the blade on the inside of the side wall portion with the blade therebetween; A cold plate, 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.

2. The cold plate according to claim 1 , wherein the pillars extend in an arrangement direction of the blades.

3. 3. The cold plate according to claim 1, wherein the top wall portion has a protrusion protruding from a lower surface thereof and coming into contact with the column portion in the vertical direction.

4. The side wall portion has a rectangular ring shape in a top view, 4. The cold plate according to claim 3, wherein at least a portion of the column portion faces the side wall portion extending in the extension direction across a gap at a corner of the side wall portion, and faces the side wall portion extending in the arrangement direction across a gap.

5. a plate-shaped intermediate cover portion disposed between the top wall portion and the side wall portion; the intermediate cover portion has a through-hole that is surrounded by the side wall portion and penetrates in the up-down direction, the ceiling wall portion has an inlet through which the refrigerant flows, 3. The cold plate according to claim 1, wherein the coolant flowing in through the inlet flows into the coolant flow path through the through-hole.

6. The intermediate lid portion is an intermediate protrusion disposed inside the side wall portion, protruding from a lower surface and contacting the column portion in the up-down direction; the intermediate protrusion is disposed away from the periphery of the through hole in the extension direction, the top wall portion and the intermediate lid portion are in contact with each other via an annular seal member that surrounds the through hole, The cold plate according to claim 5 , wherein a portion of the sealing member is disposed on the upper surface of the intermediate lid portion between the intermediate protrusion and a periphery of the through-hole.

7. The cold plate according to claim 6 , wherein ends of the blades in the extending direction overlap with peripheries of the through holes in a top view.

8. The cold plate according to claim 7 , wherein the end of the blade in the extending direction and a periphery of the through hole face each other in the up-down direction with a gap therebetween.

9. The ceiling wall portion is a top wall protrusion that protrudes from a lower surface into the through hole and through which the inlet passes; The cold plate according to claim 5 , wherein a sheet-like buffer material is disposed between the top wall protrusion and the blade.

10. The intermediate lid portion is a recessed portion disposed adjacent to the through hole in the extension direction, the upper surface of which is recessed downward and covered by the ceiling wall portion; The ceiling wall portion is an outlet through which the refrigerant flows out, the outlet being disposed opposite the recess in the up-down direction; the refrigerant flow path extends from an internal space surrounded by the bottom wall portion, the intermediate lid portion, and the side wall portion to an internal space surrounded by the recess portion and the top wall portion, the sealing member surrounds the through hole and the recess; The cold plate according to claim 6 , wherein a portion of the sealing member is disposed between the intermediate protrusion, which is disposed on the opposite side of the through hole from the recess in the extension direction, and a periphery of the through hole.

11. 11. The cold plate according to claim 10, wherein the refrigerant flow path in the internal space surrounded by the recess and the top wall portion has a narrower width in the arrangement direction than the refrigerant flow path in the internal space surrounded by the bottom wall portion, the intermediate lid portion, and the side wall portion.

12. The cold plate according to claim 11 , wherein the refrigerant flow paths in the internal space surrounded by the recess and the top wall portion have widths in the arrangement direction that become narrower with increasing distance from the through holes in the extension direction.

13. a metal 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; The cold plate according to claim 1 , further comprising: a refrigerant pipe connected to the elbow by welding or brazing and extending along an upper surface of the top wall portion.

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