Cold plate

Abstract

The cold plate includes a bottom wall portion, a top wall portion, a plurality of blades, and a side wall portion. The lower surface of the bottom wall portion is in thermal contact with the heating component. The top wall portion covers an upper surface of the bottom wall portion. The blades are arranged side by side on the upper surface of the bottom wall portion and extend linearly. The side wall portion is disposed between the bottom wall portion and the top wall portion, surrounds the blades, and forms a refrigerant flow path through which a refrigerant flows. The bottom wall portion has a plurality of pillar portions. The column parts protrude from the upper surface and face each other in the extension direction of the blades on the inner side of the side wall parts across the blades. The upper end of the column portion is located at the same position as the upper end of the blade or above the upper end of the blade.

Description

Technical Field

[0001] This invention relates to cold-rolled steel plates. Background Technology

[0002] A conventional cold plate includes a bottom wall, a top wall, multiple blades, and side walls. The lower surface of the bottom wall is in thermal contact with the heat-generating component. The top wall covers the upper surface of the bottom wall. The blades are arranged on the upper surface of the bottom wall and extend in a straight line. The side walls connect the bottom wall and the top wall, surrounding the blades to form a refrigerant flow path for refrigerant to circulate internally. The cold plate is manufactured by joining the bottom wall and the top wall together (see, for example, Patent Document 1). [Existing Technical Documents] [Patent Literature]

[0003] Patent Document 1: Chinese Patent Application Publication No. 110600444 Summary of the Invention

[0004] However, in conventional cold-rolled plates, when the top wall is joined to the bottom wall, there is a possibility that the blades may deform, resulting in a reduction in cooling efficiency.

[0005] The purpose of this invention is to provide a cold plate that can suppress blade deformation during manufacturing.

[0006] An exemplary cold plate of the present invention includes a bottom wall portion, a top wall portion, a plurality of blades, and sidewall portions. The lower surface of the bottom wall portion is in thermal contact with a heating element. The top wall portion covers the upper surface of the bottom wall portion. The blades are arranged on the upper surface of the bottom wall portion and extend in a straight line. The sidewall portions are disposed between the bottom wall portion and the top wall portion, surrounding the blades to form a refrigerant flow path for refrigerant to circulate internally. The bottom wall portion has a plurality of pillar portions. The pillar portions protrude from the upper surface of the bottom wall portion and are opposite to the blades in the extension direction of the blades, separated by the blades, on the inner side of the sidewall portions. The upper ends of the pillar portions are located at the same position as or above the upper ends of the blades.

[0007] According to the exemplary invention, a cold plate capable of suppressing blade deformation during manufacturing can be provided. Attached Figure Description

[0008] Figure 1 This is a perspective view of the cold plate according to the first embodiment of the present invention. Figure 2 This is a top view of the cold plate according to the first embodiment of the present invention. Figure 3 yes Figure 2 Sectional view along line AA in the diagram. Figure 4 yes Figure 2 BB line section view. Figure 5This is a top view of the bottom wall portion of the cold plate according to the first embodiment of the present invention. Figure 6 This is a perspective view showing an enlarged portion of the cold plate according to the first embodiment of the present invention. Figure 7 This 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 This is an exploded perspective view of the cold plate according to the second embodiment of the present invention. Figure 9 This is a perspective view of the middle cover portion of the cold plate according to the second embodiment of the present invention. Figure 10 This is a top view of the cold plate according to the second embodiment of the present invention. Figure 11 yes Figure 10 The CC line section view. Figure 12 yes Figure 10 DD line section view. Detailed Implementation

[0009] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In this application, the relative direction between the bottom wall portion 12 and the top wall portion 13 is referred to as the "vertical direction". Furthermore, relative to the bottom wall portion 12, the direction in which the top wall portion 13 is disposed is referred to as "above", and the opposite direction to the direction in which the top wall portion 13 is disposed is referred to as "below". In this application, the direction orthogonal to the "vertical direction" is referred to as the "horizontal direction", and the shape and positional relationship of each part will be explained.

[0010] Furthermore, the direction in which the blades 12a of the cold plate 10 extend is defined as the extending direction (X1-X2), and the direction in which the blades 12a are arranged is defined as the arranging direction (Y1-Y2). In this embodiment, the vertical direction (Z1-Z2) is orthogonal to the extending direction (X1-X2) and the arranging direction (Y1-Y2). However, the vertical and horizontal directions are defined only for ease of explanation and do not limit the orientation of the cold plate 10 during manufacturing and use.

[0011] Furthermore, in this application, "parallel direction" also includes directions that are substantially parallel. Additionally, in this application, "orthogonal direction" also includes directions that are substantially orthogonal.

[0012] <First Implementation> A cold plate, an exemplary embodiment of the present invention, will now be described. Figure 1 This is a perspective view of the cold plate 10 according to the first embodiment of the present invention. Figure 2 This is a top view of the cold plate 10. Additionally, Figure 3 yes Figure 2AA line profile in the middle, Figure 4 yes Figure 2 The BB line profile in the image. Additionally... Figure 5 This is a top view of the bottom wall portion 12 of the cold plate 10. Additionally, in Figures 1-5 In the original text, the bend 15 and the refrigerant pipe 16 are omitted.

[0013] The cold plate 10 is made of a metal with high thermal conductivity, such as copper or aluminum, and includes a bottom wall portion 12, a top wall portion 13, a side wall portion 14, blades 12a, and a buffer member 20. In this embodiment, the cold plate 10 is rectangular when viewed from above. That is, the bottom wall portion 12 and the top wall portion 13 are rectangular plates that extend horizontally when viewed from above. In addition, the bottom wall portion 12 and the top wall portion 13 in this embodiment are quadrilaterals when viewed from above, but are not limited to this; for example, they can also be polygons or circles with multiple corners when viewed from above.

[0014] The lower surface of the bottom wall 12 is in thermal contact with heat-generating components H, such as the CPU, that should be cooled (see reference). Figure 3 The top wall portion 13 covers the upper surface of the bottom wall portion 12. Furthermore, the top wall portion 13 has a protrusion 13c projecting from its lower surface. The protrusion 13c contacts the column portion 12b (described later) in the vertical direction (Z1-Z2). In this embodiment, the protrusion 13c extends in the alignment direction (Y1-Y2). Additionally, the protrusion 13c and the side wall portion 14 face each other with a gap in the extending direction (X1-X2) and the alignment direction (Y1-Y2). By providing the protrusion 13c, the strength of the top wall portion 13 is improved.

[0015] A sidewall portion 14 is disposed between the bottom wall portion 12 and the top wall portion 13, surrounding the blade 12a to form a refrigerant flow path 11 for refrigerant to circulate internally. In this embodiment, the sidewall portion 14 is rectangular annular in plan view. The sidewall portion 14 connects the peripheries of the bottom wall portion 12 and the top wall portion 13.

[0016] The sidewall portion 14 has a first sidewall portion 14a protruding upward (Z1) from the periphery of the bottom wall portion 12 and a second sidewall portion 14b protruding downward (Z2) from the periphery of the top wall portion 13. The upper surface of the first sidewall portion 14a is joined to the lower surface of the second sidewall portion 14b. In this embodiment, the sidewall portion 14 is composed of the first sidewall portion 14a and the second sidewall portion 14b, but it may also be composed of only one of them. That is, the upper surface of the first sidewall portion 14a may be joined to the lower surface of the top wall portion 13 (where the second sidewall portion 14b is omitted), or the lower surface of the second sidewall portion 14b may be joined to the upper surface of the bottom wall portion 12 (where the first sidewall portion 14a is omitted).

[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 for refrigerant to flow into the refrigerant flow path 11 and an outlet 13b for refrigerant to flow out of the refrigerant flow path 11.

[0018] An inlet 13a is disposed at one end of the refrigerant flow path 11. An outlet 13b is disposed at the other end of the refrigerant flow path 11. Refrigerant flowing 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 to extend through the top wall portion 13 in the vertical direction. The refrigerant is a liquid, such as antifreeze such as an aqueous solution of ethylene glycol or propylene glycol, or pure water.

[0019] in addition, Figure 6 This is a perspective view showing an enlarged portion of the cold plate 10. The cold plate 10 also includes a metal bend 15 and a refrigerant pipe 16. The bend 15 is disposed on the upper surface of the top wall 13 and is connected to the refrigerant inlet 13a or outlet 13b of the refrigerant flow path 11. The refrigerant pipe 16 is connected to the bend 15 in a horizontal direction by welding or brazing and extends along the upper surface of the top wall 13.

[0020] The bend 15 can be connected to both the inlet 13a and the outlet 13b, or only to one of them. The bend 15 is made of a metal with high thermal conductivity, such as copper or aluminum. The bend 15 changes the refrigerant flow direction from vertical (Z1-Z2) to horizontal. The bend 15 is threaded to the top wall 13, for example, via multiple screws 15a. Furthermore, although not shown, it is preferable to provide a sealing component such as a rubber O-ring or rubber gasket between the bend 15 and the top wall 13. This helps to suppress refrigerant leakage around the inlet 13a and the outlet 13b.

[0021] By providing the bend 15, the refrigerant pipe 16 can be easily connected to the inlet 13a and the outlet 13b. Furthermore, the strength of the piping components surrounding the inlet 13a and the outlet 13b can be improved. Additionally, by arranging the refrigerant pipe 16 along the upper surface of the top wall 13, the cold plate 10 can be miniaturized in the vertical direction (Z1-Z2). Moreover, by rotating the bend 15 around the vertical direction (Z1-Z2) and fixing it to the top wall 13, the extension direction of the refrigerant pipe 16 can be freely changed in the horizontal direction.

[0022] Refrigerant line 16 is connected to a pump (not shown) that circulates the refrigerant. When the pump is driven, the refrigerant circulates in refrigerant flow path 11. Heat from the heating element H is transferred to the bottom wall 12 of the cold plate 10. The heat transferred to the bottom wall 12 is transferred to the refrigerant flowing in refrigerant flow path 11. The refrigerant dissipates heat through a radiator (not shown). Through the above, the temperature rise of the heating element H can be suppressed.

[0023] Multiple blades 12a are arranged side-by-side on the upper surface of the bottom wall portion 12 and extend linearly in the extending direction (X1-X2). In this embodiment, the blades 12a and the bottom wall portion 12 are the same component. The blades 12a are formed, for example, by machining multiple linear grooves extending in the extending direction (X1-X2) on the upper surface of the bottom wall portion 12. As a result, the thermal conductivity of the refrigerant flowing in the refrigerant flow path 11 from the bottom wall portion 12 via the blades 12a is improved. Alternatively, the blades 12a may be formed from a different component than the bottom wall portion 12. For example, the blades 12a may be formed on a plate-shaped base component, and the bottom wall portion 12 may be welded to the base component.

[0024] Multiple column portions 12b protrude from the upper surface of the bottom wall portion 12 and are positioned opposite each other in the extending direction (X1-X2) of the blade 12a, separated from the blade 12a on the inner side of the side wall portion 14. The upper end of the column portion 12b is located above (Z1) the upper end of the blade 12a. The width of the column portion 12b in the extending direction (X1-X2) and the width of the column portion 12b in the arrangement direction (Y1-Y2) are greater than the width of the blade 12a in the arrangement direction (Y1-Y2).

[0025] In this embodiment, the column portion 12b extends along the arrangement direction (Y1-Y2) of the blades 12a. Furthermore, the column portion 12b and the blades 12a are separated by a gap in the extending direction (X1-X2). Additionally, the end portion of the column portion 12b in the arrangement direction (Y1-Y2) is separated by a gap at the corner of the sidewall portion 14, which extends in the extending direction (X1-X2). The refrigerant flows through the gap surrounding the column portion 12b.

[0026] By providing the column portion 12b, the strength of the bottom wall portion 12 can be increased, thereby suppressing the deflection of the bottom wall portion 12. As a result, the deformation of the blade 12a can be reduced. In addition, since the column portion 12b extends along the arrangement direction (Y1-Y2) of the blade 12a, it can further suppress the deflection of the bottom wall portion 12 in the arrangement direction (Y1-Y2).

[0027] Furthermore, when the top wall portion 13 is joined to the bottom wall portion 12, the column portion 12b supports the top wall portion 13. This prevents the top wall portion 13 from contacting the blade 12a and causing deformation of the blade 12a. Additionally, since the upper end of the column portion 12b is located above (Z1) the upper end of the blade 12a, the top wall portion 13 is more likely to contact the column portion 12b than the blade 12a. This reduces the likelihood of the top wall portion 13 contacting the blade 12a. Therefore, deformation of the blade 12a during manufacturing can be suppressed. Thus, a cold plate 10 can be provided that suppresses the reduction in cooling effect caused by deformation of the blade 12a. Alternatively, the upper end of the column portion 12b can also be located at the same position as the upper end of the blade 12a.

[0028] By providing a protrusion 13c on the top wall portion 13 that contacts the column portion 12b, the strength of the top wall portion 13 can be improved, and the deflection of the top wall portion 13 can be suppressed. As a result, it is possible to further prevent the top wall portion 13 from contacting the blade 12a and causing the blade 12a to deform.

[0029] Furthermore, the column portion 12b is positioned opposite the blade 12a in the extending direction (X1-X2) of the blade 12a, and when the blade 12a is formed by cutting, the cutting edge is inserted in the arrangement direction (Y1-Y2). Therefore, the cutting edge is less likely to come into contact with the column portion 12b. Thus, the blades 12a arranged in the arrangement direction (Y1-Y2) can be formed with precision, improving the manufacturing efficiency of the cold plate 10.

[0030] A sheet-like buffer member 20 is disposed between the top wall portion 13 and the blade 12a. The buffer member 20 is, for example, a mesh member woven with multiple metal wire-like components, having gaps (not shown) forming a refrigerant flow path. The buffer member 20 has a flow hole 20a extending in the vertical direction (Z1-Z2). In this embodiment, the flow hole 20a extends along the arrangement direction (Y1-Y2). The flow hole 20a is opposite to the inlet 13a in the vertical direction (Z1-Z2). Thus, the refrigerant flows smoothly into the refrigerant flow path 11 through the inlet 13a and the flow hole 20a.

[0031] By configuring the buffer 20, contact between the top wall 13 and the blade 12a can be prevented, thereby preventing deformation of the blade 112a. In addition, the refrigerant can flow smoothly into the refrigerant flow path 111 through the inlet 13a and the flow hole 20a.

[0032] Figure 7This is a top view showing a modified example of the bottom wall portion 12 of the cold plate 10. The column portion 12b can also be divided into multiple portions and arranged in the extending direction (X1-X2). In this case, it is preferable that at the corner of the side wall portion 14, at least a portion of the column portion 12b is opposite to the side wall portion 14 extending in the extending direction (X1-X2) in the arrangement direction (Y1-Y2) with a gap, and also opposite to the side wall portion 14 extending in the arrangement direction (Y1-Y2) in the extending direction (X1-X2) with a gap. As a result, it is particularly possible to prevent the blade 12a from deforming around the corner of the side wall portion 14.

[0033] <Second Implementation> Next, the second embodiment of the present invention will be described. Figure 8 This is an exploded perspective view of the cold plate 110 according to the second embodiment of the present invention. Figure 9 This is a perspective view of the middle cover 115, shown from below. Figure 10 This is a top view of the cold plate 110. Figure 11 yes Figure 10 CC line profile in the image. Figure 12 yes Figure 10 The DD line profile in the image. Additionally, in... Figure 8 In the image, the sealing component 116 is shown with a single-dotted line. Additionally, in... Figures 8-12 In the original text, the bend 15 and the refrigerant pipe 16 are omitted.

[0034] The cold plate 110 of the second embodiment also includes a plate-shaped intermediate cover portion 115 disposed between the top wall portion 13 and the side wall portion 115a. The top wall portion 13 and the intermediate cover portion 115 are in contact via an annular sealing member 116 surrounding the through hole 115b and the recess 115c. By configuring the sealing member 116, the sealing performance inside the refrigerant flow path 111 is improved. As a sealing member, a rubber gasket can be used as an example.

[0035] In this embodiment, the sidewall portion 115a protrudes downward (Z2) from the lower surface of the intermediate cover portion 115, and its lower surface engages with the upper surface of the bottom wall portion 112. Alternatively, the sidewall portion 115a may protrude from the upper surface of the bottom wall portion 112. Alternatively, the sidewall portion 115a may be divided in the vertical direction (Z1-Z2) and disposed separately in the intermediate cover portion 115 and the bottom wall portion 112.

[0036] In this embodiment, the column portion 112b, like in the first embodiment, can increase the strength of the bottom wall portion 112 and suppress the deflection of the bottom wall portion 112. This, in turn, reduces the deformation of the blade 112a.

[0037] Specifically, when the intermediate cover 115 is joined to the bottom wall 112, the pillar 112b supports the intermediate cover 115. This prevents the intermediate cover 115 from contacting the blade 112a and causing deformation of the blade 112a. Furthermore, since the upper end of the pillar 112b is located above (Z1) the upper end of the blade 112a, the intermediate cover 115 is more likely to contact the pillar 112b than the blade 112a. This reduces the likelihood of the intermediate cover 115 contacting the blade 112a. Alternatively, the upper end of the pillar 112b can also be located at the same position as the upper end of the blade 112a.

[0038] The intermediate cover 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 extends through in the vertical direction (Z1-Z2). In this embodiment, the through hole 115b is rectangular when viewed from above, but the present invention is not limited thereto.

[0039] The refrigerant flowing in through inlet 113a flows into refrigerant flow path 111 through through hole 115b. Refrigerant flow path 111 is formed in an internal space surrounded by bottom wall portion 112, intermediate cover portion 115 and side wall portion 115a. At this time, by providing intermediate cover portion 115, the shape of refrigerant flow path 111 can be easily designed.

[0040] The top wall portion 13 has a top wall protrusion 113d that protrudes from its lower surface into the interior of the through hole 115b, and the inlet 113a passes through the top wall protrusion 113d. Furthermore, a sheet-like buffer member 120 is disposed between the top wall protrusion 113d and the blade 112a. The buffer member 120 has a flow hole 120a that extends in the vertical direction (Z1-Z2). In this embodiment, the flow hole 120a extends along the arrangement direction (Y1-Y2).

[0041] By configuring the buffer 120, the top wall protrusion 113d can be prevented from contacting the blade 112a, thereby preventing deformation of the blade 112a. In addition, the refrigerant can flow smoothly 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 sidewall portion 115a, protruding from the lower surface of the intermediate cover portion 115 and contacting the pillar portion 112b in the vertical direction (Z1-Z2). The intermediate protrusions 115d and 115e are disposed opposite each other in the extending direction (X1-X2) through the through hole 115b. The intermediate protrusion 115e is disposed on the opposite side (X2) of the extending direction relative to the recess 115c, through the through hole 115b.

[0043] The intermediate protrusions 115d and 115e are respectively positioned away from the periphery of the through hole 115b in the extending direction (X1-X2) (see reference). Figure 12 Furthermore, when viewed from above, the end of the blade 112a in the extension direction (X1-X2) overlaps with the periphery of the through hole 115b. This allows the blade 112a to be extended in the extension direction (X1-X2), thereby improving the cooling effect of the cold plate 110.

[0044] Furthermore, the end of the blade 112a in the extending direction (X1-X2) is positioned opposite the periphery of the through hole 115b in the vertical direction (Z1-Z2) with a gap between them. As a result, the refrigerant flowing along the blade 112a in the extending direction (X1-X2) flows smoothly at the end of the blade 112a in the extending direction (X1) and flows towards the column portion 112b. This helps to suppress the increase in refrigerant flow resistance.

[0045] In this embodiment, the intermediate protrusions 115d and 115e extend along the arrangement direction (Y1-Y2). Furthermore, the intermediate protrusions 115d and 115e face each other in the arrangement direction (Y1-Y2) with a gap between them and the sidewall portion 115a extending in the arrangement direction (Y1-Y2). By providing the intermediate protrusions 115d and 115e, the strength of the intermediate cover portion 115 is increased. Therefore, when the intermediate cover portion 115 and the bottom wall portion 112 are joined, deformation of the blade 112a can be further prevented.

[0046] A portion of the sealing member 116 is disposed on the upper surface of the intermediate cover portion 115 between the periphery of the intermediate protrusion 115e and the through hole 115b (see reference). Figure 12 Therefore, the area surrounded by the sealing member 116 can be narrowed, thereby reducing the capacity of the refrigerant flow path 111 and suppressing the enlargement of the cold plate 110.

[0047] Furthermore, the sealing member 116 is disposed inside the groove 113c formed on the lower surface of the top wall portion 113. As a result, the positioning of the sealing member 116 becomes easier, and the manufacturing efficiency of the cold plate 110 can be further improved.

[0048] In this embodiment, the recess 115c and the through hole 115b are arranged adjacent to each other in the extending direction (X1), and the upper surface is recessed downward (Z2) and covered by the top wall portion 113. The outlet 113b of the top wall portion 113 is arranged opposite to the recess 115c in the vertical direction (Z1-Z2). The refrigerant flow path 111 extends from the internal space surrounded by the bottom wall portion 112, the intermediate cover portion 115 and the side wall portion 115a to the internal space surrounded by the recess 115c and the top wall portion 113.

[0049] Therefore, the refrigerant flowing in the refrigerant flow path 111, which is surrounded by the bottom wall portion 112, the intermediate cover portion 115, and the side wall portion 115a, flows upward (Z1) between the outer peripheral surface of the top wall protrusion 113d and the inner peripheral surface of the through hole 115b. Additionally, the refrigerant flows over the periphery of the through hole 115b into the recess 115c. The refrigerant flowing into the recess 115c is discharged through the outlet 113b. By enlarging the intermediate cover portion 115 and providing the recess 115c, the cooling area can be expanded. This allows cooling of the heat-generating component positioned around the heat-generating component H.

[0050] In this embodiment, the refrigerant flow path 111 in the internal space surrounded by the recess 115c and the top wall portion 113 has a narrower width in the arrangement direction (Y1-Y2) compared to the refrigerant flow path 111 in the internal space surrounded by the bottom wall portion 112, the middle cover portion 115, and the side wall portion 115a. More specifically, the width of the refrigerant flow path 111 in the internal space surrounded by the recess 115c and the top wall portion 113 narrows in the arrangement direction (Y1-Y2) as it exits from the through hole 115b along the extending direction (X1). This allows the refrigerant to flow smoothly toward the outlet 113b.

[0051] <Other> The above embodiments are merely examples of the present invention. Furthermore, the structure of the embodiments can be appropriately modified without departing from the technical concept of the present invention. Additionally, the embodiments can be combined and implemented within possible combinations. For example, in the first embodiment, the column portion 12b and the protrusion 13c contact each other in the vertical direction (Z1-Z2), but the protrusion 13c may be omitted. In this case, it is preferable that the upper surface of the column portion 12b contacts the lower surface of the top wall portion 13. Furthermore, in the second embodiment, the column 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 column portion 112b contacts the lower surface of the intermediate cover portion 115.

[0052] <Postscript> As described above, a cold plate 10 according to one embodiment of the present invention includes: a bottom wall portion 12 whose lower surface is in thermal contact with a heating element H; a top wall portion 13 covering the upper surface of the bottom wall portion; a plurality of blades 12a arranged on the upper surface of the bottom wall portion and extending in a straight line; and a side wall portion 14 disposed between the bottom wall portion and the top wall portion, surrounding the blades to form a refrigerant flow path 11 for refrigerant to circulate inside, the bottom wall portion having a plurality of pillar portions 12b protruding from the upper surface and facing each other in the extension direction X1-X2 of the blades on the inner side of the side wall portion, the upper ends of the pillar portions being located at the same position as the upper end of the blades or at a position above the upper end of the blades (first structure).

[0053] Alternatively, in the first structure described above, the column portion can also be configured such that it extends along the arrangement direction Y1-Y2 of the blades (second structure).

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

[0055] Alternatively, in any of the first to third structures described above, the sidewall portion may be configured such that, when viewed from above, it is a rectangular ring shape, and at least a portion of the column portion is positioned at the corner of the sidewall portion opposite to the sidewall portion extending along the extension direction in the arrangement direction, separated by a gap, and is also opposite to the sidewall portion extending along the arrangement direction in the extension direction (fourth structure).

[0056] Alternatively, in any of the first to fourth structures described above, it may also be configured to include a plate-shaped intermediate cover 115 disposed between the top wall portion and the side wall portion. The intermediate cover portion has a through hole 115b that is surrounded by the side wall portion and extends in the vertical direction. The top wall portion has an inlet 113a for the refrigerant to flow in. The refrigerant flowing in through the inlet flows into the refrigerant flow path through the through hole (fifth structure).

[0057] Alternatively, in any of the first to fifth structures described above, the intermediate cover may also have intermediate protrusions 115d and 115e disposed inside the side wall portion and protruding from the lower surface to contact the column portion in the vertical direction Z1-Z2. The intermediate protrusions are disposed away from the periphery of the through hole in the extending direction. The top wall portion contacts the intermediate cover portion via an annular sealing member 116 surrounding the through hole. A portion of the sealing member is disposed on the upper surface of the intermediate cover portion between the intermediate protrusions and the periphery of the through hole (sixth structure).

[0058] Alternatively, in any of the first to sixth structures described above, the end of the blade extending in the direction of extension may overlap with the periphery of the through hole when viewed from above (seventh structure).

[0059] Alternatively, in any of the first to seventh structures described above, the end of the blade in the extending direction may be positioned opposite the periphery of the through hole in the vertical direction with a gap between them (eighth structure).

[0060] Alternatively, in any of the first to eighth structures described above, the top wall portion may have a top wall protrusion 113d that protrudes from the lower surface into the interior of the through hole and passes through the flow inlet, and a sheet-like buffer 120 (ninth structure) is disposed between the top wall protrusion and the blade.

[0061] Alternatively, in any of the first to ninth structures described above, the intermediate cover may have a recess 115c, which is adjacent to the through hole in the extending direction, and its upper surface is recessed downward and covered by the top wall. The top wall has an outlet 113b, which is opposite to the recess in the vertical direction and is used for refrigerant outflow. The refrigerant flow path extends from the internal space surrounded by the bottom wall, the intermediate cover, and the side wall to the internal space surrounded by the recess and the top wall. The sealing member surrounds the through hole and the recess, and a portion of the sealing member is disposed between the intermediate protrusion and the periphery of the through hole. The intermediate protrusion is disposed across the through hole on the side opposite to the recess in the extending direction (tenth structure).

[0062] Alternatively, in any of the first to tenth structures described above, the width of the refrigerant flow path arrangement direction in the internal space surrounded by the recess and the top wall portion may be narrower than the width of the refrigerant flow path arrangement direction in the internal space surrounded by the bottom wall portion, the middle cover portion, and the side wall portion (eleventh structure).

[0063] Alternatively, in any of the first to eleventh structures described above, the refrigerant flow path in the internal space surrounded by the recess and the top wall portion may be configured such that the width of the arrangement direction narrows as it leaves the through hole along the extending direction (twelfth structure).

[0064] Alternatively, any of the above-mentioned first to twelfth structures may also include: a metal bend 15 disposed on the upper surface of the top wall and connected to the refrigerant inlet 13a or outlet 13b of the refrigerant flow path; and a refrigerant pipe 16 connected to the bend by welding or brazing and extending along the upper surface of the top wall (thirteenth structure). Symbol Explanation

[0065] 10, 110 cold-rolled steel plate 11, 111 Refrigerant Flow Path 12, 112 bottom wall 12a and 112a blades Columns 12b and 112b 13, 113 Top wall part 13a, 113a inlet 13b, 113b outlet 13c Protrusion 14, 115a Sidewall portion 14a First sidewall portion 14b Second sidewall portion 15 Bends 15a screw 16 Refrigerant pipe 20, 120 buffer 20a and 120a flow holes 113c groove 113d Top wall protrusion 115 Middle Cover 115b Through Hole 115c recess 115d, 115e Intermediate protrusion 116 Sealing components H. Heating component.

Claims

1. A cold-rolled steel plate, characterized in that, have: The bottom wall portion, the lower surface of which is in thermal contact with the heating element; The top wall portion covers the upper surface of the bottom wall portion; Multiple blades are arranged on the upper surface of the bottom wall and extend in a straight line; as well as A sidewall portion, disposed between the bottom wall portion and the top wall portion, surrounds the blade to form a refrigerant flow path for refrigerant to circulate internally. The bottom wall portion has multiple pillars that protrude from the upper surface of the bottom wall portion and are positioned opposite each other in the extending direction of the blades on the inner side of the side wall portion. The upper end of the column is located at the same position as the upper end of the blade or at a position slightly above the upper end of the blade.

2. The cold-rolled plate according to claim 1, characterized in that, The column extends along the direction of the blade arrangement.

3. The cold-rolled plate according to claim 1 or 2, characterized in that, The top wall portion has a protrusion that extends from the lower surface and contacts the column portion in the vertical direction.

4. The cold-rolled plate according to claim 3, characterized in that, The sidewall portion appears as a rectangular ring when viewed from above. At least a portion of the column is located at the corner of the sidewall portion and is positioned opposite the sidewall portion extending along the extension direction in the arrangement direction, separated by a gap, and is also positioned opposite the sidewall portion extending along the arrangement direction in the extension direction, separated by a gap.

5. The cold-rolled plate according to claim 1 or 2, characterized in that, It also includes a plate-shaped intermediate cover portion disposed between the top wall portion and the side wall portion. The middle cover portion has a through hole that is surrounded by the side wall portion and extends through it in the vertical direction. The top wall portion has an inlet for the refrigerant to flow into. The refrigerant flowing in through the inlet flows into the refrigerant flow path through the through hole.

6. The cold-rolled plate according to claim 5, characterized in that, The intermediate cover also has a central protrusion, which is disposed on the inner side of the side wall portion, protrudes from the lower surface of the intermediate cover, and contacts the column portion in the vertical direction. The intermediate protrusion is disposed away from the periphery of the through hole in the extending direction. The top wall portion and the middle cover portion are in contact via an annular sealing member surrounding the through hole. A portion of the sealing component is disposed on the upper surface of the intermediate cover between the intermediate protrusion and the periphery of the through hole.

7. The cold-rolled plate according to claim 6, characterized in that, The end of the blade in the extending direction overlaps with the periphery of the through hole when viewed from above.

8. The cold-rolled plate according to claim 7, characterized in that, The end of the blade in the extending direction is opposite to the periphery of the through hole in the vertical direction with a gap between them.

9. The cold-rolled plate according to claim 5, characterized in that, The top wall portion has a top wall protrusion that protrudes from the lower surface into the interior of the through hole and passes through the flow inlet. A sheet-like buffer is disposed between the top wall protrusion and the blade.

10. The cold-rolled plate according to claim 6, characterized in that, The intermediate cover has a recess that is adjacent to the through hole in the extending direction, and its upper surface is recessed downward and covered by the top wall. The top wall portion has an outlet, which is arranged opposite to the recess in the vertical direction and is used for the refrigerant to flow out. The refrigerant flow path extends from the internal space surrounded by the bottom wall, the middle cover, and the side wall to the internal space surrounded by the recess and the top wall. The sealing component surrounds the through hole and the recess. A portion of the sealing member is disposed between the intermediate protrusion and the periphery of the through hole, the intermediate protrusion being disposed across the through hole on the side opposite to the recess in the extending direction.

11. The cold plate according to claim 10, characterized in that, The width of the refrigerant flow path in the internal space surrounded by the recess and the top wall is narrower than the width of the refrigerant flow path in the internal space surrounded by the bottom wall, the middle cover and the side wall.

12. The cold-rolled plate according to claim 11, characterized in that, The refrigerant flow path in the internal space surrounded by the recess and the top wall narrows in width as it exits the through hole along the extending direction.

13. The cold-rolled plate according to claim 1, characterized in that, It also has: A metal bend, the bend being disposed on the upper surface of the top wall and connected to the refrigerant inlet or outlet of the refrigerant flow path; and A refrigerant pipe, which is connected to the bend by welding or brazing, and extends along the upper surface of the top wall portion.

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