Radiator

Abstract

The present invention provides a heat sink in which the heat uniformization of a base part is excellent, the degree of freedom of arrangement of a heat conduction member is excellent, and the fins can be designed to have an optimal thickness. The heat sink includes: a base portion having a first surface and a second surface opposite to the first surface, a heating element thermally connected to the second surface; and a heat sink vertically provided on the first surface of the base portion, the base portion and the heat sink being independent members, respectively, and at least a portion of a heat conduction member being embedded in the heat sink.

Description

Technical Field

[0001] The present invention relates to a radiator, comprising a base portion thermally connected to a heating element and a radiating fin, and in particular to a radiator with a heat conducting component buried therein. Background Art

[0002] As a means of cooling a heat generating body such as an electronic component installed in a specified space, a heat sink having a heat sink provided on a base portion thermally connected to the heat generating body is sometimes used. In addition, with the high functionality of various devices, the heat generated by the heat generating body such as the electronic components mounted on the devices increases, making it increasingly important to improve the cooling performance of the heat sink.

[0003] In order to improve the cooling performance of the radiator, it is necessary to improve the efficiency of the fins provided in the radiator. Therefore, a heat pipe is provided along the plane direction of the base of the radiator, and the heat from the heating element is transferred to the entire area of ​​the base where the fins are provided through the heat transfer function of the heat pipe. By using the heat pipe to transfer the heat from the heating element to the entire area of ​​the base where the fins are provided, the base becomes thermally balanced, and the heat load of the entire fin becomes uniform, so that the efficiency of the fins is improved.

[0004] When a heat pipe is provided at the base of the heat sink, it is necessary to improve the thermal connection between the heat pipe and the heat sink. Therefore, a heat sink is proposed (Patent Document 1), in which the base and the heat sink are integrally formed, the heat pipe is embedded in the base, the heat-generating electronic component is mounted on the base, the heat transfer capacity of the heat pipe is utilized to diffuse the heat to the base, and the heat of the base is released from the heat sink integrally formed with the base.

[0005] In Patent Document 1, a heat pipe is embedded in a base portion integrally formed with a heat sink, and a heat-generating electronic component is mounted on the base portion, thereby promoting diffusion of heat from the heat-generating electronic component to the entire base portion, preventing local heat concentration in the base portion, and enabling effective heat dissipation through the heat sink integrally formed with the base portion.

[0006] On the other hand, in order to improve the heat dissipation characteristics of the radiator, it is sometimes necessary to reduce the fin pitch of the radiator by thinning the fins, while ensuring the gap between the fins to prevent the increase in the pressure loss of the cooling air supplied to the fins. However, in Patent Document 1, since the radiator and the base are integrally formed, the radiator cannot be designed to an optimal thickness, and the thickness of the radiator is thicker than required, so it is impossible to reduce the fin pitch of the radiator while ensuring the gap between the radiator. From the perspective of improving the heat dissipation characteristics of the radiator, there is a need for improvement. In addition, in Patent Document 1, the thickness of the radiator becomes thicker than required, so there is also a need for improvement from the perspective of reducing the weight.

[0007] In addition, for example, in mobile phone base stations, due to the continuous increase in the amount of wireless communications in recent years, a substrate is used on which a large number of electronic components are arranged in a complex manner, and the electronic components include relatively low-heat-generating electronic components such as antennas and amplifiers and high-heat-generating electronic components such as FPGAs (Field Programmable Gate Arrays). When a large number of electronic components with various heat-generating amounts mounted on the substrate are thermally connected to a heat sink, it is difficult to maintain uniform heat distribution at the base of the heat sink, and therefore it is also difficult to evenly transfer heat to the heat sink, which may reduce the efficiency of the heat sink.

[0008] In addition, in order to prevent interference between electronic components, a shielding portion is sometimes formed on the heat receiving surface of the base portion of the heat sink. The shielding portion is a recessed portion corresponding to the position and shape of the electronic component, and the electronic component is accommodated in the shielding portion, thereby shielding the electronic component mounted on the substrate. If a shielding portion is provided on the heat receiving surface of the base portion of the heat sink, when a heat conducting member such as a heat pipe is provided on the base member, the heat conducting member needs to be arranged in a manner avoiding the shielding portion. Therefore, if a shielding portion is provided on the heat receiving surface of the base portion, the degree of freedom of arrangement of heat conducting members such as heat pipes is reduced, and thus there is a problem in terms of improving the efficiency of the heat sink by making the heat load on the entire base portion and the entire heat sink uniform. (Prior art literature) (Patent Document)

[0009] Patent Document 1: Japanese Patent Publication No. 2000-269676 Summary of the invention Problems to be solved by the invention

[0010] In view of the above circumstances, an object of the present invention is to provide a heat sink in which a base portion is excellent in heat uniformity, a heat conduction member is excellent in arrangement freedom, and a heat sink can be designed to have an optimum thickness. Means for solving problems

[0011] The gist of the configuration of the present invention is as follows. [1] A heat sink comprising: a base having a first surface and a second surface opposite to the first surface, a heating element being thermally connected to the second surface; and a heat sink, which is vertically arranged on the first surface of the base portion, The base portion and the heat sink are independent components. At least a portion of the heat conduction member is buried in the heat sink. [2] The heat sink according to [1], wherein the heat sink has a block portion extending in the extending direction of the base portion, and at least a portion of the heat conduction member is embedded in the block portion. [3] The heat sink according to [1], wherein the thermally conductive member is embedded in the base portion. [4] The heat sink according to [2], wherein the block portion is a convex portion of the first surface of the base portion that protrudes from the first surface of the base portion in a thickness direction of the base portion. [5] The heat sink according to [4], wherein the heat sink fins are erected on the block portion and are lower than the heat sink fins erected on the first surface other than the block portion. [6] The heat sink according to [5], wherein the heat sink fins provided upright on the block portion are flush with the heat sink fins provided upright on the first surface other than the block portion. [7] The heat sink according to [2], wherein the block portion is a convex portion of the second surface of the base portion that protrudes from the second surface of the base portion in a thickness direction of the base portion. [8] The heat sink according to [2], wherein the heat sink has a front end portion in the height direction of the heat sink and a base portion as a rising start portion starting from the base portion, and the block portion is arranged in an intermediate portion between the front end portion and the base portion of the heat sink. [9] The heat sink according to any one of [1] to [8], wherein the heat conduction member has a heat receiving portion that is thermally connected to the heat generating element.

[10] The heat sink according to any one of [1] to [8], wherein the entire heat conduction member is buried in the heat sink.

[11] The heat sink according to [1], wherein at least a partial region of the heat conductive member has an exposed portion exposed from the second surface of the base portion, and the exposed portion is in direct contact with the heat generating element.

[12] The heat sink according to [7], wherein at least a portion of the heat conductive member has an exposed portion exposed from the convex portion of the second surface, and the exposed portion is in direct contact with the heat generating element.

[13] The heat sink according to any one of [1] to [8], wherein the heat conduction member extends along an extending direction of the base portion.

[14] The heat sink according to

[11] or

[12] , wherein the heat conduction member has a step portion bent in a thickness direction of the base portion, and the exposed portion is formed by the step portion.

[15] The heat sink according to

[11] or

[12] , wherein the heat conduction member has a protruding portion that protrudes in the thickness direction of the base portion, and the exposed portion is formed by the protruding portion.

[16] The heat sink according to any one of [1] to [8], wherein the heat conduction member is a heat pipe or a vapor chamber.

[17] The heat sink according to any one of [1] to [8], wherein a portion of the heat sink is a cast member, and the heat conductive member is embedded in the cast member by insert casting.

[18] The heat sink according to

[16] , wherein a sealed injection pipe used for injecting a working fluid into the heat pipe or the vapor chamber is disposed inwardly of a peripheral portion of the heat sink.

[19] The heat sink according to

[16] , wherein the heat pipe is a flat heat pipe that has been flattened.

[0012] In the heat sink of the present invention, the heat sink includes a base portion thermally connected to the heat source, a heat sink as a heat exchange member, and a heat conduction member. In addition, in the heat sink of the present invention, since the base portion and the heat sink are independent members, the base portion and the heat sink are different members, and a boundary portion is formed between the base portion and the heat sink.

[0013] In addition, in the heat sink of the present invention, since at least a portion of the heat conduction member is embedded in the heat sink, the outer peripheral surface of at least a portion of the heat conduction member is not exposed from the surface of the base portion. As can be seen from the above, at least a portion of the heat conduction member is embedded in the heat sink so as not to be exposed from the first surface, and at least a portion of the heat conduction member is embedded in the heat sink so as not to be exposed from the second surface. Effects of the Invention

[0014] In the heat sink mode of the present invention, the heat sink includes: a base portion having a first surface, a second surface opposite to the first surface, and a heating element being thermally connected to the second surface; and a heat sink disposed upright on the first surface of the base portion, wherein the base portion and the heat sink are independent components, respectively. Therefore, compared with the case where the base portion and the heat sink are integrally formed, the heat sink can be made thinner, and thus the heat sink thickness can be designed to meet the performance requirements. Therefore, according to the heat sink mode of the present invention, since the heat sink spacing can be reduced, the ventilation efficiency can be improved by increasing the number of heat sinks or expanding the space between the heat sinks, thereby improving the heat dissipation characteristics of the heat sink. In addition, according to the heat sink mode of the present invention, since the base portion and the heat sink are independent components, compared with the case where the base portion and the heat sink are integrally formed, the heat sink can be designed to an optimal thickness by making the thickness of the heat sink thinner, and thus the weight of the heat sink can be reduced. In addition, according to the heat sink of the present invention, since the base and the heat sink are independent components, the thickness of the heat sink can be optimized, so that the gap between the heat sinks can be reliably ensured, and the pressure loss of the cooling air supplied between the heat sinks can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink. In addition, according to the heat sink of the present invention, since at least a part of the heat conduction member is buried in the heat sink, the heat conduction member in the heat sink has excellent arrangement freedom and excellent thermal connectivity. Therefore, according to the heat sink of the present invention, even if a plurality of electronic components having various heat generation amounts are thermally connected to the heat sink, it is possible to ensure that the base of the heat sink is heat-homogenized, and the heat transfer from the base becomes uniform throughout the heat sink, so that the heat transfer from the base to the heat sink becomes smooth, and the heat load on the entire heat sink becomes uniform. Therefore, in the heat sink of the present invention, since the efficiency of the heat sink is improved, the heat dissipation characteristics of the heat sink are improved.

[0015] According to the aspect of the heat sink of the present invention, by providing the block portion extending in the extending direction of the base portion, at least a part of the heat conduction member is buried in the block portion, so that the buried position of the heat conduction member can be reliably ensured.

[0016] According to the heat sink of the present invention, the heat conduction member is buried in the base portion, so that the entire base portion is thermally balanced smoothly through the heat conduction function of the heat conduction member, and the heat transfer from the base portion is made equal throughout the heat sink, so that the heat load on the entire heat sink can be made more uniform, further improving the efficiency of the heat sink.

[0017] According to the heat sink of the present invention, the block portion is a convex portion of the first surface protruding from the first surface of the base portion in the thickness direction of the base portion, so that the entire base portion can be reliably made thermally balanced through the heat conduction function of the heat conduction member, and the heat transfer from the base portion can be reliably made uniform throughout the heat sink. Therefore, the heat load on the entire heat sink can be made more uniform, the efficiency of the heat sink can be further improved, and the heat exchange function of the heat sink can be reliably improved.

[0018] According to the heat sink of the present invention, the heat sink is provided on the block portion at a lower level than the heat sink provided on the first surface outside the block portion, thereby saving space for the heat sink. In addition, when a large amount of heat is transferred to a portion of the base portion where the heat conduction member is located, even if the heat sink in the portion where the heat conduction member is located is low and has a small heat sink area, the heat that is not completely dissipated from the heat sink in the portion where the heat conduction member is located is transferred to the high heat sink (i.e., the heat sink with a large area) provided at the portion where the heat conduction member is not located, thereby improving the efficiency of the heat sink, and as a result, improving the heat dissipation characteristics of the heat sink.

[0019] According to the heat sink of the present invention, the heat sink fins erected on the block are flush with the heat sink fins erected on the first surface outside the block, thereby reliably saving heat sink space and reliably improving the heat dissipation characteristics of the heat sink.

[0020] According to the heat sink of the present invention, the block is provided at the middle portion between the front end portion and the base portion of the heat sink, so that the heat conduction function of the heat conduction member can reliably balance the heat of the entire heat sink, thereby reliably improving the efficiency of the heat sink.

[0021] According to the aspect of the heat sink of the present invention, the entire heat conduction member is buried in the heat sink, thereby further improving the thermal connectivity of the heat conduction member in the heat sink.

[0022] According to the heat sink of the present invention, at least a portion of the heat conduction member has an exposed portion exposed from the second surface of the base portion, and the exposed portion is in direct contact with the heat generating element, thereby further improving the thermal connectivity between the heat generating element and the heat conduction member, thereby further improving the heat dissipation characteristics of the heat sink.

[0023] According to the heat sink of the present invention, the heat conduction member is a heat pipe or a heat spreader, so that the heat conduction member has heat transport characteristics, thereby making the heat load on the entire heat sink more uniform, and further improving the efficiency of the heat sink.

[0024] According to the aspect of the heat sink of the present invention, a part of the heat sink is a cast member, and the heat conductive member is embedded in the cast member by insert casting, so that the thermal connectivity of the heat conductive member in the heat sink is further improved.

[0025] According to the radiator of the present invention, the sealed injection pipe of the heat pipe or the heat spreader is arranged on the inner side of the peripheral portion of the radiator, so that even if the radiator is set in an external environment exposed to wind and rain, the heat pipe or the heat spreader can be prevented from being corroded, thereby improving the durability of the radiator.

[0026] According to the aspect of the heat sink of the present invention, the heat pipe is a flat heat pipe, which contributes to miniaturization of the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a perspective view for explaining a heat sink according to a first embodiment of the present invention. Figure 2 It is a schematic diagram for explaining the structure of the heat sink according to the first embodiment of the present invention. Figure 3 This is a schematic diagram for explaining the arrangement of the heat conduction members of the heat sink according to the first embodiment of the present invention, as seen from above. Figure 4 The heat sink according to the first embodiment of the present invention is Figure 3 Side cross-sectional view along line AA. Figure 5 This is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to the first embodiment of the present invention. Figure 6 It is a side cross-sectional view for explaining an injection pipe used for a heat pipe provided in a heat sink according to a first embodiment of the present invention. Figure 7 This is a schematic diagram showing an example of how to use the heat sink according to the first embodiment of the present invention. Figure 8 It is a side cross-sectional view of a heat sink according to a second embodiment of the present invention. Fig. 9 It is a side cross-sectional view of a heat sink according to a third embodiment of the present invention. Fig.10 It is a side cross-sectional view of a heat sink according to a fourth embodiment of the present invention. Fig.11 It is a bottom perspective view for explaining a heat sink according to a fourth embodiment of the present invention. Fig.12 It is a side cross-sectional view of a heat sink according to a fifth embodiment of the present invention. Fig.13 It is a schematic diagram of a heat pipe used in a heat sink according to a fifth embodiment of the present invention. Fig.14 It is a side cross-sectional view of a heat sink according to a sixth embodiment of the present invention. Fig.15 It is a side cross-sectional view of a heat sink according to a seventh embodiment of the present invention. Fig.16 It is a bottom perspective view for explaining a heat sink according to a seventh embodiment of the present invention. Fig.17 This is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to an eighth embodiment of the present invention. Fig.18 It is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to a ninth embodiment of the present invention. Fig.19 It is a side cross-sectional view for explaining an injection pipe used in a heat pipe provided in a heat sink according to a ninth embodiment of the present invention. Fig. 20 It is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to a tenth embodiment of the present invention. Fig.21 It is a side view for explaining an injection pipe used for a heat pipe provided in a heat sink according to a tenth embodiment of the present invention. Fig. 22 It is a schematic plan view for explaining the arrangement of heat conduction members of a heat sink according to an eleventh embodiment of the present invention. Fig.23 It is a schematic plan view for explaining the arrangement of heat conduction members of a heat sink according to a twelfth embodiment of the present invention. Fig.24 It is a schematic plan view for explaining the arrangement of fins of a heat sink according to a thirteenth embodiment of the present invention. Fig.25 It is a schematic plan view for explaining the arrangement of fins of a heat sink according to a fourteenth embodiment of the present invention. Fig.26 It is a schematic plan view for explaining the arrangement of fins of a heat sink according to a fifteenth embodiment of the present invention. Fig. 27 It is a side cross-sectional view of a heat sink according to a sixteenth embodiment of the present invention. DETAILED DESCRIPTION

[0028] Hereinafter, a heat sink according to a first embodiment of the present invention will be described using the accompanying drawings. Figure 1 It is a perspective view for explaining a heat sink according to a first embodiment of the present invention. Figure 2 It is a schematic diagram for explaining the structure of the heat sink according to the first embodiment of the present invention. Figure 3 This is a schematic diagram for explaining the arrangement of the heat conduction members of the heat sink according to the first embodiment of the present invention, as seen from above. Figure 4 The heat sink according to the first embodiment of the present invention is Figure 3 Side cross-sectional view along line AA.

[0029] like Figure 1 , 2 As shown, the heat sink 1 involved in the first embodiment includes a flat base portion 20 and a plurality of heat sinks 10, 10, 10, ... provided on the surface of the base portion 20. The base portion 20 has a first surface 21 and a second surface 22 opposite to the first surface 21. The second surface 22 of the base portion 20 is thermally connected to a heating element 100. A plurality of heat sinks 10, 10, 10, ... are vertically provided on the first surface 21 of the base portion 20.

[0030] The base portion 20 is a plate-shaped portion having a first direction L1 and a second direction L2 orthogonal to the first direction L1. The shape of the base portion 20 is not particularly limited. For ease of description, the heat sink 1 is quadrilateral in a plan view (a state viewed from a position opposite to the heat sink 10). The base portion 20 is thermally connected to the heat source 100 by the heat source 100 abutting against the second surface 22 of the base portion 20. Therefore, the second surface 22 of the base portion 20 functions as a heat receiving surface.

[0031] A plurality of plate-shaped heat sinks 10, 10, 10, ... are erected on the base portion 20. The heat sink 10 is erected on the first surface 21 of the base portion 20 at a predetermined angle relative to the extension direction of the first surface 21. In the heat sink 1, the heat sink 10 is erected in a direction substantially perpendicular to the extension direction of the first surface 21. In addition, each heat sink 10 extends from one end of the second direction L2 of the base portion 20 to the other end. In the heat sink 1, for ease of explanation, the heat sink 10 extends substantially linearly from one end of the second direction L2 of the base portion 20 to the other end. Each heat sink 10 extends in a direction substantially parallel to the second direction L2 of the base portion 20 and in a direction substantially orthogonal to the first direction L1. In addition, the heat sink 10 has substantially the same height from one end to the other end of the second direction L2 of the base portion 20.

[0032] A plurality of heat sinks 10, 10, 10, ... are arranged in parallel at predetermined intervals on the first surface 21 of the base portion 20 to form a heat sink group 11. In the heat sink 1, a plurality of heat sinks 10, 10, 10, ... are arranged in parallel from one end to the other end of the base portion 20 in the first direction L1 to form a heat sink group 11. There is no particular limitation on the heat sink spacing of the plurality of heat sinks 10, 10, 10, ..., and in the heat sink 1, a plurality of heat sinks 10, 10, 10, ... are arranged in parallel at substantially equal intervals throughout the entire heat sink group 11.

[0033] In the radiator 1, the base portion 20 and the plurality of heat sinks 10, 10, 10... are independent of each other. That is, the base portion 20 and the plurality of heat sinks 10, 10, 10... are independent components. In addition, the plurality of heat sinks 10, 10, 10... are independent components. As can be seen from the above, in the radiator 1, by compounding the base portion 20 and the plurality of heat sinks 10, 10, 10..., the plurality of heat sinks 10, 10, 10... are vertically arranged on the base portion 20. Therefore, a boundary portion 14 such as a joint portion, an adhesive portion, and a seam is formed between the base portion 20 and the plurality of heat sinks 10, 10, 10...

[0034] The method for fixing the heat sink 10 in a state where it is upright on the first surface 21 of the base portion 20, i.e., the method for forming the boundary portion 14, can be exemplified by: a method for soldering the base of the heat sink 10 to the first surface 21 of the base portion 20; a method for welding the base of the heat sink 10 to the first surface 21 of the base portion 20 by laser welding or the like; a method for inserting the base of the heat sink 10 into a groove formed on the first surface 21 of the base portion 20 to plastically deform the base portion 20 near the groove, thereby fixing the heat sink 10 in the groove of the base portion 20; etc.

[0035] like Figure 1 , 2 As shown, the heat sink 10 is not provided on the second surface 22 of the base portion 20. Therefore, the heat sink 10 is provided on a single surface of the base portion 20. The heat sink 10 is a thin flat plate-shaped member having a main surface 12 and a side surface 13. In the heat sink 10, mainly the main surface 12 contributes to the heat dissipation of the heat sink 10. The width of the side surface 13 constitutes the thickness of the heat sink 10. In addition, there is no particular limitation on the shape of the heat sink 10. In the heat sink 1, the main surface 12 of the heat sink 10 is rectangular.

[0036] Since the base portion 20 and the plurality of heat sinks 10, 10, 10, ... are independent components, the material of the heat sink 10 and the material of the base portion 20 may be the same or different. The material of the heat sink 10 is not particularly limited, and examples thereof include copper, copper alloy, aluminum, and aluminum alloy. The material of the base portion 20 is not particularly limited, and examples thereof include copper, copper alloy, aluminum, and aluminum alloy.

[0037] like Figure 2 , 3 4, at least a portion of the heat conduction member 31 is embedded in the heat sink 1. The heat sink 1 includes a block portion 40 extending in the extension direction of the base portion 20 and being a block-shaped portion, and the heat conduction member 31 is embedded in the block portion 40. In the heat sink 1, the block portion 40 extends from one end to the other end of the second direction L2 of the base portion 20. In addition, for the sake of convenience of explanation, the block portion 40 extends approximately linearly from one end to the other end of the second direction L2 of the base portion 20. Therefore, the block portion 40 extends along the extension direction of the heat sink 10.

[0038] In the heat sink 1, the block 40 is a convex portion of the first surface 21 protruding from the first surface 21 of the base 20 in the thickness direction of the base 20. The heat sink 10 constituting the heat sink group 11 is also vertically arranged on the block 40. The block 40 is integrally formed with the base 20. Therefore, the block 40 is formed continuously with the first surface 21, and no boundary portion such as a joint portion, an adhesive portion, or a seam is formed between the block 40 and the first surface 21.

[0039] On the other hand, the block 40 and the plurality of heat sinks 10, 10, 10, ... are independent of each other, and the block 40 is a component independent of the plurality of heat sinks 10, 10, 10, ... Therefore, a boundary portion 14 such as a joint portion, an adhesive portion, or a seam is formed between the block 40 and the plurality of heat sinks 10, 10, 10, ... The method of fixing the heat sink 10 in a state where it is vertically arranged on the block 40, that is, the method of forming the boundary portion 14, for example, can include the following methods: a method of joining the base of the heat sink 10 to the block 40 by solder; a method of welding the base of the heat sink 10 to the block 40 by laser welding or the like; a method of inserting the base of the heat sink 10 into a groove formed on the block 40, and plastically deforming the block 40 near the groove, thereby fixing the heat sink 10 to the groove of the block 40.

[0040] like Figure 2 , 4 As shown, in the heat sink 1, a heat sink 10 is vertically arranged on the block 40, which is lower than the heat sink 10 vertically arranged on the first surface 21 outside the block 40. The heat sink 10-1 is vertically arranged on the first surface 21 outside the block 40, and the heat sink 10-2 is vertically arranged on the block 40, and the heat sink 10-1 has a size higher than the heat sink 10-2. As can be seen from the above, the area of ​​the heat sink 10-1 vertically arranged on the first surface 21 outside the block 40 is larger than the area of ​​the heat sink 10-2 vertically arranged on the block 40.

[0041] In addition, the heat sink 10-2 erected on the block 40 is flush with the heat sink 10-1 erected on the first surface 21 outside the block 40. As can be seen from the above, the front end of the heat sink 10-1 and the front end of the heat sink 10-2 are located on substantially the same plane. Therefore, the heat sink 10-1 has a dimension that is higher than the height of the heat sink 10-2 by the thickness of the block 40.

[0042] In the heat sink 1, since a plurality of heat generating bodies 100, 100, 100, ... are thermally connected to the second surface 22 of the base 20, a plurality of blocks 40 as convex portions of the first surface 21 are provided from one end to the other end of the base 20 in the first direction L1. The plurality of blocks 40, 40, 40, ... are arranged in parallel at predetermined intervals.

[0043] The heat conduction member 31 extends from one end to the other end of the second direction L2 of the base 20, corresponding to the block 40 extending from one end to the other end of the second direction L2 of the base 20. In addition, the heat conduction member 31 extends from one end to the other end of the second direction L2 of the base 20, corresponding to the block 40 extending approximately linearly from one end to the other end of the second direction L2 of the base 20. Therefore, the heat conduction member 31 extends along the extension direction of the base 20. In addition, the heat conduction member 31 extends along the extension direction of the heat sink 10. That is, the heat conduction member 31 extends in a direction approximately parallel to the extension direction of the heat sink 10. In addition, the heat conduction member 31 is provided on each of the plurality of blocks 40, 40, 40, ..., which are convex portions of the first surface 21. Therefore, corresponding to the plurality of blocks 40, 40, 40, ... being arranged in parallel at a predetermined interval from one end to the other end of the base 20 in the first direction L1, the plurality of heat conduction members 31, 31, 31, ... are arranged in parallel at a predetermined interval from one end to the other end of the base 20 in the first direction L1. As can be seen from the above, the plurality of heat conduction members 31, 31, 31, ... are arranged in parallel in the first direction L1 of the base 20 in a state of facing the outer peripheral surface of the heat conduction member 31.

[0044] like Figure 3 , 4 As shown in FIG. 1 , in the heat sink 1, the entire heat conduction member 31 is buried in the heat sink 1. Specifically, the entire heat conduction member 31 is buried in the block 40. Therefore, the outer surface of the heat conduction member 31 is not exposed from the block 40. That is, the outer surface of the heat conduction member 31 is not exposed from the outer surface of the base 20. As can be seen from the above, the heat conduction member 31 is buried in the heat sink 1 without being exposed from the first surface 21, and the heat conduction member 31 is buried in the heat sink 1 without being exposed from the second surface 22.

[0045] The heat conducting member 31 has a heat receiving portion 32 thermally connected to the heat generating element 100. In addition, the heat conducting member 31 has a portion 34 other than the heat receiving portion 32. When the heat conducting member 31 is heated by the heat generating element 100 at the heat receiving portion 32, the heat from the heat generating element 100 is conducted from the heat receiving portion 32 to the portion 34 other than the heat receiving portion 32 along the extending direction of the heat conducting member 31. It should be noted that, when the heat conducting member 31 is thermally connected to a plurality of heat generating elements 100, 100, 100, ..., the portion thermally connected to the heat generating element 100 having a larger heat generation among the plurality of heat generating elements 100, 100, 100, ... functions as the heat receiving portion 32.

[0046] In the radiator 1, a heat pipe 30 as a heat transfer member is provided as a heat conduction member 31. The heat pipe 30 includes a tubular container 33 with one end and the other end sealed, a wick structure (not shown) having a capillary force accommodated in the container 33, and a working fluid (not shown) such as water sealed in the inner space of the container 33. The container 33 is a pipe material whose inner space is sealed. In addition, the sealed inner space of the container 33 is depressurized by degassing. In the heat pipe 30, the heat receiving portion 32 functions as an evaporation portion, and the portion 34 other than the heat receiving portion 32 functions as a condensation portion.

[0047] The shape of the container 33 in the direction (radial direction) perpendicular to the longitudinal direction may be circular, elliptical, flat, rectangular, etc., but is not particularly limited. However, the heat sink 1 has a circular shape.

[0048] The base portion 20 having the block portion 40 in the heat sink 1 is a cast member, and the heat conducting member 31 (heat pipe 30) is embedded in the block portion 40 of the base portion 20 by insert casting. The heat pipe 30 is integrally insert-cast with the block portion 40 of the base portion 20, so that the heat pipe 30 is embedded and fixed in the block portion 40 which is the convex portion of the first surface 21. As can be seen from the above, the heat pipe 30 does not need to be fixed to the base portion 20 by soldering. Therefore, it is not necessary to form a plating layer required for soldering separately on the outer surface of the container 33 of the heat pipe 30.

[0049] The material of the container 33 of the heat pipe 30 may be the same as or different from that of the base 20. Examples of the material of the container 33 of the heat pipe 30 include copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy, and stainless steel.

[0050] Next, an injection pipe used to inject the working fluid into the heat pipe 30 will be described. Figure 5 This is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to the first embodiment of the present invention. Figure 6 It is a side cross-sectional view for explaining an injection pipe used for a heat pipe provided in a heat sink according to a first embodiment of the present invention.

[0051] The heat pipe 30 is manufactured by the following method: after the internal space of the container 33 is depressurized, a working fluid is injected into the internal space of the container 33 from an injection pipe that is connected to the internal space of the container 33 and extends from the container 33, and after the working fluid is injected, a predetermined portion of the injection pipe is sealed, thereby sealing the working fluid in the internal space of the container 33. Figure 5 , 6 As shown, the sealed injection pipe 35 used to inject the working fluid into the heat pipe 30 is provided inside the peripheral portion 23 of the radiator 1. Therefore, the sealed injection pipe 35 does not protrude outward from the peripheral portion 23 of the radiator 1.

[0052] In the heat sink 1, the sealed injection pipe 35 is extended in a direction perpendicular to the extension direction of the heat pipe 30, and is thus arranged in the inner direction of the peripheral portion 23 of the heat sink 1. In the heat sink 1, the sealed injection pipe 35 extends from the container 33 of the heat pipe 30 toward the second surface 22. It should be noted that in the heat sink 1, the vertical dimension of the sealed injection pipe 35 is smaller than the thickness of the base portion 20. Therefore, when the heat sink 1 is connected to a substrate on which a heating element 100 as a cooling object is mounted, the sealed injection pipe 35 is located inside a structure formed by connecting the substrate on which the heating element 100 is mounted and the heat sink 1, and is not exposed to the external environment of the structure. It should be noted that, although there is no particular limitation on the installation position of the injection pipe 35, in the heat sink 1, the sealed injection pipe 35 is arranged at one end of the container 33. In addition, the shape of the sealed injection pipe 35 arranged at one end of the container 33 is L-shaped.

[0053] Next, an example of how to use the heat sink 1 will be described. Figure 7 This is a schematic diagram showing an example of how to use the heat sink according to the first embodiment of the present invention.

[0054] like Figure 7 As shown, the substrate 101 is housed in the housing 102, and the radiator 1 can cool the radiator 1 by thermally connecting the radiator 1 to the base 20 of the radiator 1. Figure 7In the embodiment, the heat sink 1 is provided in such a manner that the base portion 20 of the heat sink 1 extends in the direction of gravity, and the heat sink 10 extends in the direction of gravity, corresponding to the extension of the substrate 101 in the direction of gravity. A shielding portion is formed on the heating surface of the base portion 20, and the shielding portion is a recessed portion corresponding to the position and shape of the plurality of heating elements 100, 100, 100, ..., and the heating element 100 mounted on the substrate 101 is electromagnetically shielded by accommodating the heating element 100 in the shielding portion, and the heating element 100 is thermally connected to the heating surface of the base portion 20.

[0055] When the plurality of heating elements 100, 100, 100, ... are thermally connected to the heat receiving surface of the base portion 20, the heat from the plurality of heating elements 100, 100, 100, ... is transferred to the base portion 20. At this time, since the plurality of heating elements 100, 100, 100, ... have different heat generation amounts according to their functions, and the plurality of heating elements 100, 100, 100, ... are arranged at predetermined positions of the substrate 101 according to their functions, when the heat from the plurality of heating elements 100, 100, 100, ... is transferred to the base portion 20, the heat received amount differs depending on the position of the base portion 20. On the other hand, the heat pipe 30 embedded in the block portion 40 as the convex portion of the first surface 21 has a heat receiving portion 32 thermally connected to the heating element 100 via the base portion 20. Therefore, the heat pipe 30 transfers the heat from the heating element 100 from the heat receiving portion 32, i.e., the evaporation portion, to a portion 34 outside the heat receiving portion 32, i.e., the condensation portion, through its heat transfer function, so that the heat transferred from the heating element 100 to the base portion 20 is diffused throughout the entire base portion 20. The heat diffused through the base portion 20 is transferred from the base portion 20 to the heat sink 10, and the heat transferred to the heat sink 10 is released to the outside of the radiator 1 through the heat exchange effect of the heat sink 10. It should be noted that the cooling wind that promotes the heat exchange effect of the heat sink 10 is generated from bottom to top in the direction of gravity, for example, by natural convection, without using a forced cooling device such as a blower fan. In addition, as needed, a forced cooling device can also be used to promote the heat exchange effect of the heat sink 10.

[0056] The substrate 101 on which the plurality of heat generating elements 100, 100, 100, ... having various heat generating amounts are mounted is, for example, a substrate provided in a base station for mobile phones. In addition, a base station installed at the front end of a tower is an example of a base station for mobile phones.

[0057] Next, an example of a method for manufacturing the heat sink 1 is described. First, a metal mold corresponding to the shape of the base portion 20 having the block portion 40 is prepared. Next, a container 33 having an injection pipe 35, which will become the heat pipe 30, is arranged at a position corresponding to the block portion 40 of the metal mold. At this time, the internal space of the container 33 is preliminarily degassed and set to a reduced pressure state. Next, molten metal is pressed into the metal mold so that the base portion 20 having the block portion 40 and the container 33 having the injection pipe 35 become one, so that the container 33 having the injection pipe 35 is buried in the base portion 20 having the block portion 40 by insert casting. Next, after a working fluid such as water is injected into the internal space of the container 33 through the injection pipe 35, the injection pipe 35 is sealed, thereby obtaining the base portion 20 in which the heat pipe 30 is buried in the block portion 40. Thereafter, a plurality of heat sinks 10, 10, 10, ... are installed on the first surface 21 of the base portion 20 including the block portion 40, and the heat sink 1 can be obtained. Thereafter, a desired shielding portion is formed on the second surface 22 of the base portion 20 as required.

[0058] In the heat sink 1, since it includes: a base portion 20 having a first surface 21 and a second surface 22 facing the first surface 21, and the heat generating body 100 is thermally connected to the second surface 22; and a heat sink 10 erected on the first surface 21 of the base portion 20, the base portion 20 and the heat sink 10 are independent components, so compared with the case where the base portion 20 and the heat sink 10 are integrally formed, the heat sink 10 can be made thinner, and thus the thickness of the heat sink 10 can be designed to meet the performance requirements. Therefore, in the heat sink 1, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 1. In addition, in the heat sink 1, since the base portion 20 and the heat sink 10 are independent components, compared with the case where the base portion 20 and the heat sink 10 are integrally formed, the heat sink 10 can be designed to have an optimal thickness by making the thickness of the heat sink 10 thinner, so the weight of the heat sink 1 can be reduced. In addition, in the heat sink 1, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 1. Therefore, in the heat sink 1, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 1, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 1, since at least a part of the heat conduction member 31 (heat pipe 30) is buried in the block 40 which is the convex portion of the first surface 21, even if the shielding portion is formed on the second surface 22 of the base 20, the degree of freedom of arranging the heat conduction member 31 (heat pipe 30) is excellent, and the thermal connection of the heat conduction member 31 (heat pipe 30) in the heat sink 1 is also excellent. Therefore, in the heat sink 1, even if a plurality of heat generating bodies (e.g., electronic components) 100 having various heat generating amounts are thermally connected to the base portion 20 of the heat sink 1, the base portion 20 of the heat sink 1 can be ensured to be heat-homogenized, and the heat transfer from the base portion 20 can be made uniform throughout the heat sink 10, because the heat is diffused throughout the base portion 20 through the heat conducting member 31 (heat pipe 30), and the base portion 20 is heat-homogenized throughout the entirety. Therefore, in the heat sink 1, the heat load of the entirety of the heat sink 10 becomes uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 1, even if a plurality of heat generating bodies 100 having various heat generating amounts are thermally connected, the heat dissipation characteristics can be improved.

[0059] In particular, in the heat sink 1 , since the block portion 40 extends in the extending direction of the base portion 20 , the heat conduction member 31 (heat pipe 30 ) is buried in the block portion 40 , and the buried position of the heat conduction member 31 (heat pipe 30 ) can be reliably ensured.

[0060] In particular, in the heat sink 1, the block portion 40 is a convex portion of the first surface 21 protruding from the first surface 21 of the base portion 20 in the thickness direction of the base portion 20, so that the entire base portion 20 can be reliably heat-homogenized by the heat conduction function of the heat conduction member 31 (the heat transfer function of the heat pipe 30), and the heat transfer from the base portion 20 can be reliably made uniform in the entire heat sink 10. Therefore, in the heat sink 1, the heat load on the entire heat sink 10 can be made more uniform, the efficiency of the heat sink 10 can be further improved, and the heat exchange function of the heat sink 10 can be reliably improved.

[0061] In particular, in the heat sink 1, since the heat sink 10-2 is erected on the block 40 and is lower than the heat sink 10-1 erected on the first surface 21 outside the block 40, it is possible to save space in the heat sink 1. In addition, when a large amount of heat needs to be transferred in the portion where the heat conducting member 31 (heat pipe 30) is located in the base 20, even if the heat sink 10-2 in the portion where the heat conducting member 31 (heat pipe 30) is located (i.e., the block 40) is low and has a small heat sink area, the heat that is not completely dissipated from the heat sink 10-2 in the portion where the heat conducting member 31 (heat pipe 30) is located is transferred to the tall heat sink 10-1 (i.e., a heat sink with a large area) erected in the portion where the heat conducting member 31 (heat pipe 30) is not located (i.e., the portion where the block 40 is not located) through the base 20, the heat sink efficiency of the heat sink group 11 is improved, and as a result, the heat dissipation characteristics of the heat sink 1 are improved.

[0062] In particular, in the radiator 1, since the heat sink 10-2 erected on the block 40 is flush with the heat sink 10-1 erected on the first surface 21 outside the block 40, the heat dissipation characteristics of the radiator 1 are reliably improved while reliably saving the space of the radiator 1.

[0063] In particular, in the heat sink 1 , since the heat conduction member 31 (heat pipe 30 ) is entirely buried in the heat sink 1 , the thermal connectivity of the heat conduction member 31 (heat pipe 30 ) in the heat sink 1 is further improved.

[0064] In particular, in the heat sink 1 , by using the heat pipe 30 as the heat conduction member 31 , the heat conduction member 31 has excellent heat transfer characteristics, so that the heat load of the entire heat sink 10 is made more uniform, and the efficiency of the heat sink 10 can be further improved.

[0065] In particular, in the heat sink 1, the base portion 20 having the block portion 40 is a cast member, and the heat conduction member 31 (heat pipe 30) is embedded in the block portion 40 by insert casting, thereby further improving the thermal connectivity of the heat conduction member 31 (heat pipe 30) in the heat sink 1.

[0066] In particular, in the radiator 1, the sealed injection pipe 35 of the heat pipe 30 is arranged on the inner side of the peripheral portion 23 of the radiator 1, so that even if the radiator 1 is set in an external environment such as wind and rain, the heat pipe 30 can be prevented from being corroded, thereby improving the durability of the radiator 1.

[0067] Next, the heat sink according to the second embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the second embodiment has the same main components as the heat sink according to the first embodiment, the same components as those of the heat sink according to the first embodiment are described using the same reference numerals. Figure 8 It is a side cross-sectional view of a heat sink according to a second embodiment of the present invention.

[0068] In the heat sink 1 according to the first embodiment, the shape of the container 33 of the heat pipe 30 in the direction (radial direction) perpendicular to the longitudinal direction is circular, but instead, Figure 8 As shown, in the heat sink 2 according to the second embodiment, the shape of the container 33 of the heat pipe 30 in the direction perpendicular to the longitudinal direction (radial direction) is flat. In the heat sink 2, the heat pipe 30 is a flat heat pipe in which the container 33 is flattened.

[0069] As described above, in the heat sink of the present invention, the radial shape of the container 33 of the heat pipe 30 is not particularly limited and can be appropriately selected according to the use conditions of the heat sink and the like.

[0070] In the heat sink 2 , since the heat pipe 30 is a flat heat pipe, it is possible to contribute to the miniaturization of the heat sink 2 .

[0071] In the heat sink 2, since the base 20 and the heat sink 10 are independent of each other, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 2, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 2. In addition, in the heat sink 2, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 2 can be reduced. In addition, in the heat sink 2, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 2. Therefore, in the heat sink 2, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 2, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 2, since at least a portion of the heat pipe 30 is buried in the block 40 which is the convex portion of the first surface 21, even if a shielding portion is formed on the second surface 22 of the base 20, the heat pipe 30 has excellent arrangement freedom, and the heat pipe 30 in the heat sink 2 also has excellent thermal connectivity. Therefore, in the heat sink 2, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 2, the heat is diffused throughout the entire base portion 20 through the heat pipe 30, so that the entire base portion 20 becomes thermally balanced, and the heat transfer from the base portion 20 becomes uniform throughout the heat sink 10. Therefore, in the heat sink 2, the heat load of the entire heat sink 10 becomes uniform, and the efficiency of the heat sink 10 is improved. As can be seen from the above, in the heat sink 2, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0072] Next, the heat sink according to the third embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the third embodiment has the same main components as the heat sinks according to the first and second embodiments, the same components as those of the heat sinks according to the first and second embodiments are described using the same reference numerals. Fig. 9 It is a side cross-sectional view of a heat sink according to a third embodiment of the present invention.

[0073] In the heat sinks 1 and 2 according to the first and second embodiments, the block 40 in which the heat pipe 30 is embedded is a convex portion of the first surface 21. Fig. 9 As shown, in the heat sink 3 according to the third embodiment, the heat sink 10 has a front end portion 15 and a base portion 16 in the height direction of the heat sink 10, the base portion 16 is a rising start portion rising from the base portion 20 and forming a boundary portion 14, and a block portion 40 in which the heat pipe 30 is buried is provided in an intermediate portion 17 between the front end portion 15 and the base portion 16 of the heat sink 10. In the heat sink 3, each block portion 40 is formed to span a plurality of heat sinks 10, 10, 10, ...

[0074] In the heat sink 3, the block 40 in which the heat pipe 30 is buried is provided in the middle portion 17 between the front end portion 15 and the base portion 16 of the heat sink 10, so that the heat sink 10 as a whole can be reliably thermally balanced by the heat transfer function of the heat pipe 30. In the heat sink 3, among the plurality of heat sinks 10, 10, 10, ..., there are heat sinks 10 provided with the block 40 and heat sinks 10 not provided with the block 40. Among the plurality of heat sinks 10, 10, 10, ..., the block 40 is provided on the heat sink 10 where it is difficult to achieve uniform heat of the entire heat sink 10, depending on the arrangement of the heat generating body 100 and the heat generated by the heat generating body 100.

[0075] In the heat sink 3, the heat sink 10 with the block 40 is flush with the heat sink 10 without the block 40. As can be seen from the above, the front end 15 of the heat sink 10 with the block 40 and the front end 15 of the heat sink 10 without the block 40 are located on substantially the same plane.

[0076] In the heat sink 3, the heat sink 10 having the block 40 is a casting component, and the heat pipe 30 is embedded in the block 40 of the heat sink 10 by insert casting. The heat pipe 30 is integrally insert-cast with the block 40 of the heat sink 10, and the heat pipe 30 is embedded and fixed in the block 40 of the heat sink 10. Including the heat sink 10 having the block 40, a plurality of heat sinks 10, 10, 10, ... are vertically arranged on the first surface 21 of the base 20, and the heat sink 3 is obtained by installing in this state.

[0077] In the heat sink 3, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 3, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 3. In addition, in the heat sink 3, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 3 can be reduced. In addition, in the heat sink 3, since the base 20 and the heat sink 10 are separate components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the plurality of heat sinks 10, 10, 10, ... can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 3. In addition, since the block 40 in which the heat pipe 30 is embedded is provided in the middle portion 17 of the heat sink 10, even if a shielding portion is formed on the second surface 22 of the base 20, the arrangement freedom of the heat pipe 30 is excellent, and the heat connection of the heat pipe 30 in the heat sink 3 is also excellent. Therefore, in the heat sink 3, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 3, the heat sink 10 can be reliably uniformly heated by the heat pipe 30, so that the heat load of the entire heat sink 10 can be uniform, and the efficiency of the heat sink 10 can be improved. As can be seen from the above, in the heat sink 3 as well, even if a plurality of heat generating elements 100 having various heat generation amounts are thermally connected, the heat dissipation characteristics are improved.

[0078] Next, the heat sink according to the fourth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the fourth embodiment has the same main components as the heat sinks according to the first to third embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to third embodiments. Fig.10 It is a side cross-sectional view of a heat sink according to a fourth embodiment of the present invention. Fig.11 It is a bottom perspective view for explaining a heat sink according to a fourth embodiment of the present invention.

[0079] In the heat sinks 1, 2, and 3 according to the first to third embodiments, the heat pipe 30 is used as the heat conducting member. Fig.10 , 11As shown, in the heat sink 4 according to the fourth embodiment, the heat spreader 50 as the heat transfer member is used as the heat conduction member.

[0080] The heat spreader 50 includes: a flat container 53 formed by sealing the peripheral portion of a laminate having a plate-like body and another plate-like body, a wick structure (not shown) having a capillary force contained in the container 53, and a working fluid (not shown) such as water sealed in the internal space of the container 53. The thin plate-shaped container 53 is a member whose internal space is sealed. In addition, the sealed internal space of the container 53 is depressurized by degassing. In the heat spreader 50, the heat receiving portion functions as an evaporation portion, and the portion other than the heat receiving portion functions as a condensation portion.

[0081] The material of the container 53 of the heat spreader 50 may be the same as or different from that of the base 20. Examples of the material of the container 53 of the heat spreader 50 include copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy, and stainless steel.

[0082] In addition, in the radiator 4, a sealed injection pipe (not shown) used for injecting the working fluid into the interior of the heat spreader 50 is provided in the inner direction of the peripheral portion of the radiator 4. In addition, in the radiator 4, the sealed injection pipe is provided in the inner direction of the peripheral portion of the radiator 4 by extending in a direction perpendicular to the extending direction of the heat spreader 50.

[0083] In addition, in the heat sinks 1, 2, and 3 according to the first to third embodiments, the block 40 in which the heat pipe 30 is buried is provided, but instead, Fig.10 , 11 As shown, in the heat sink 4 according to the fourth embodiment, the heat spreader 50 as the heat conducting member is embedded in the base 20. Therefore, in the heat sink 4, no block for embedding the heat conducting member is formed. The base 20 of the heat sink 4 is a casting member, and the heat spreader 50 is embedded in the base 20 by insert casting. The heat spreader 50 is integrally insert-cast with the base 20, so that the heat spreader 50 is embedded and fixed in the base 20.

[0084] In the heat sinks 1, 2, and 3 according to the first to third embodiments, the heat pipe 30 as the heat transport member is entirely buried in the block 40. Fig.10 , 11 As shown, in the heat sink 4 according to the fourth embodiment, at least a portion of the heat spreader 50 has an exposed portion 51 exposed from the second surface 22 of the base 20 , and the exposed portion 51 is in direct contact with the heat generating element 100 .

[0085] In the heat sink 4, the heat spreader 50 has a protrusion 52 protruding in the thickness direction of the base portion 20, and the exposed portion 51 is formed by the protrusion 52. Specifically, the front end of the protrusion 52 that becomes a flat surface is the exposed portion 51. In the heat sink 4, the protrusion 52 as a convex portion is formed in a part of the container 53, and a part of the container 53 is exposed from the second surface 22 of the base portion 20. The inside of the protrusion 52 is a space, which is connected to the internal space of the container 53. The number of protrusions 52 formed in the heat spreader 50 can be one or more, and a plurality of (2) are provided in the heat sink 4.

[0086] In the heat sink 4, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 4, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 4. In addition, in the heat sink 4, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 4 can be reduced. In addition, in the heat sink 4, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 4. Therefore, in the heat sink 4, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 4, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 4, since the thin plate-shaped heat spreader 50 is embedded in the base 20, even if the shielding portion is formed on the second surface 22 of the base 20, the arrangement freedom of the heat spreader 50 is excellent, and the heat spreader 50 in the heat sink 4 is also excellent in thermal connectivity. Therefore, in the heat sink 4, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 4, the heat is diffused throughout the base portion 20 by the heat transfer characteristics of the heat spreader 50, so that the entire base portion 20 is heat-equalized, and the heat transfer from the base portion 20 is uniform throughout the heat sink 10. Therefore, in the heat sink 4, the heat load of the entire heat sink 10 is uniform, and the efficiency of the heat sink 10 is improved. As can be seen from the above, in the heat sink 4, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0087] In particular, in the radiator 4, the heat spreader 50 as a heat conducting member is buried in the base portion 20, and the heat transfer function of the heat spreader 50 is utilized to smoothly equalize the heat of the entire base portion 20, so that the heat transfer from the base portion 20 becomes uniform in the entire heat sink 10, thereby making the heat load on the entire heat sink 10 more uniform, and the efficiency of the heat sink 10 can be further improved.

[0088] In particular, in the radiator 4, a portion of the heat spreader 50 has an exposed portion 51 exposed from the second surface 22 of the base portion 20, and the exposed portion 51 can be in direct contact with the heating element 100, thereby further improving the thermal connectivity between the heating element 100 and the heat spreader 50, thereby further improving the heat dissipation characteristics of the radiator 4.

[0089] Next, the heat sink according to the fifth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the fifth embodiment has the same main components as the heat sinks according to the first to fourth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to fourth embodiments. Fig.12 It is a side cross-sectional view of a heat sink according to a fifth embodiment of the present invention. Fig.13 It is a schematic diagram of a heat pipe used in a heat sink according to a fifth embodiment of the present invention.

[0090] In the heat sinks 1 and 2 according to the first and second embodiments, the block portion 40 corresponding to the convex portion of the first surface 21 extends approximately linearly from one end of the base portion 20 in the second direction L2 to the other end, and the heat pipe 30 extends approximately linearly from one end of the base portion 20 in the second direction L2 to the other end. Fig.12 , 13 As shown in FIG. 1 , in the heat sink 5 according to the fifth embodiment, the heat pipe 70 as the heat conducting member has a step portion 62 bent in the thickness direction of the base portion 20, and the step portion 62 forms an exposed portion 61 of the heat pipe 70 exposed from the second surface 22 of the base portion 20. In the heat sink 5, the step portion 62 is formed at a central portion 73 in the longitudinal direction of the heat pipe 70. No step portion is formed at one end portion 71 and the other end portion 72 of the heat pipe 70, and the one end portion 71 and the other end portion 72 of the heat pipe 70 extend substantially linearly.

[0091] In addition, in the heat sink 5, in addition to the block 40 as the convex portion of the first surface 21, a block 60 as the convex portion of the second surface 22 is further provided, which protrudes from the second surface 22 of the base 20 in the thickness direction of the base 20. In the heat pipe 70, one end 71 and the other end 72 of the heat pipe 70 are buried in the block 40 as the convex portion of the first surface 21, and the step portion 62 located in the center portion 73 in the length direction of the heat pipe 70 is buried in the block 60 as the convex portion of the second surface 22. Following the movement from the one end 71 of the heat pipe 70 to the center portion 73, the heat pipe 70 extends from the block 40 as the convex portion of the first surface 21 to the block 60 as the convex portion of the second surface 22. In addition, following the movement from the center portion 73 to the other end 72 of the heat pipe 70, the heat pipe 70 extends from the block 60 as the convex portion of the second surface 22 to the block 40 as the convex portion of the first surface 21. Therefore, the region of the central portion 73 of the heat pipe 70 has the exposed portion 61 exposed from the convex portion (block portion 60 ) of the second surface 22 , and the exposed portion 61 is in direct contact with the heat generating element 100 .

[0092] The step degree of the step portion 62 can be appropriately selected according to the height of the buried portion of the one end 71 and the other end 72 of the heat pipe 70 relative to the second surface 22. Therefore, the central portion 73 of the heat pipe 70 may have an exposed portion 61 exposed from the second surface 22, and the exposed portion 61 may be in direct contact with the heating element 100 without providing the block portion 60.

[0093] In the heat sink 5, a heat pipe 70 and a heat pipe 30 are provided. The heat pipe 70 forms an exposed portion 61 through a step portion 62, and the heat pipe 30 is buried in the block portion 40 as a convex portion of the first surface 21 and does not form an exposed portion, and extends substantially linearly. In the heat sink 5, the shape of the heat pipe 70 in the direction (radial direction) perpendicular to the longitudinal direction is circular. In addition, the shape of the heat pipe 30 in the direction (radial direction) perpendicular to the longitudinal direction is also circular.

[0094] In the heat sink 5, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 5, since the heat sink pitch of the heat sink 10 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 5. In addition, in the heat sink 5, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 5 can be reduced. In the heat sink 5, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied between the plurality of heat sinks 10, 10, 10, ... can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 5. In the heat sink 5, since the one end 71 and the other end 72 of the heat pipe 70 are buried in the block 40 as the convex portion of the first surface 21, even if the shielding portion is formed on the second surface 22 of the base 20, the heat pipe 70 has excellent arrangement freedom, and the heat pipes 30 and 70 in the heat sink 5 also have excellent thermal connectivity. Therefore, in the heat sink 5, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 5, the heat is diffused throughout the entire base 20 by the heat pipes 30 and 70, so that the entire base 20 is heat-homogenized, and the heat transfer from the base 20 becomes uniform in the entire heat sink 10. Therefore, in the heat sink 5 as well, the heat load on the entire heat sink 10 is made uniform, thereby improving the efficiency of the heat sink 10 .

[0095] In particular, in the radiator 5, since a part of the heat pipe 70 has an exposed portion 61 exposed from the second surface 22 of the base portion 20, the exposed portion 61 can be in direct contact with the heating element 100, thereby further improving the thermal connectivity between the heating element 100 and the heat pipe 70, thereby further improving the heat dissipation characteristics of the radiator 5.

[0096] Next, the heat sink according to the sixth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the sixth embodiment has the same main components as the heat sinks according to the first to fifth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to fifth embodiments. Fig.14 It is a side cross-sectional view of a heat sink according to a sixth embodiment of the present invention.

[0097] In the heat sink 5 according to the fifth embodiment, the shape of the heat pipes 30, 70 in the direction (radial direction) perpendicular to the longitudinal direction is circular, but instead, Fig.14 As shown, in the heat sink 6 according to the sixth embodiment, the heat pipe 70 having the step portion 62 in the central portion 73 in the longitudinal direction has a flat radial shape, and the heat pipe 30 having no step portion and extending substantially linearly has a flat radial shape. Therefore, both the heat pipes 30 and 70 are flat heat pipes whose containers are flattened.

[0098] As described above, in the heat sink of the present invention, the radial shape of the heat pipe 70 having the step portion 62 is not particularly limited and can be appropriately selected according to the use conditions of the heat sink and the like.

[0099] In the heat sink 6, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 6, since the heat sink pitch of the heat sink 10 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 6. In addition, in the heat sink 6, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 6 can be reduced. In the heat sink 6, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied between the plurality of heat sinks 10, 10, 10, ... can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 6. In the heat sink 6, since the one end 71 and the other end 72 of the heat pipe 70 are embedded in the block 40 as the convex portion of the first surface 21, even if the shielding portion is formed on the second surface 22 of the base 20, the heat pipe 70 has excellent arrangement freedom, and the heat pipes 30 and 70 in the heat sink 6 also have excellent thermal connectivity. Therefore, in the heat sink 6, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 6, the heat is diffused throughout the entire base 20 by the heat pipes 30 and 70, so that the entire base 20 is heat-homogenized, and the heat transfer from the base 20 becomes uniform in the entire heat sink 10. Therefore, in the heat sink 6 as well, the heat load on the entire heat sink 10 is made uniform, thereby improving the efficiency of the heat sink 10 .

[0100] Next, the heat sink according to the seventh embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the seventh embodiment has the same main components as the heat sinks according to the first to sixth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to sixth embodiments. Fig.15 It is a side cross-sectional view of a heat sink according to a seventh embodiment of the present invention. Fig.16 It is a bottom perspective view for explaining a heat sink according to a seventh embodiment of the present invention.

[0101] In the heat sink 4 according to the fourth embodiment, a portion of the heat spreader 50 has a protruding portion 52 protruding in the thickness direction of the base portion 20, and the protruding portion 52 forms the exposed portion 51. Fig.15 , 16 As shown, in the heat sink 7 according to the seventh embodiment, the heat spreader 50 has no protruding portion, and the heat spreader 50 is flat as a whole. Therefore, in the heat sink 7, no exposed portion is formed in the heat spreader 50.

[0102] In the heat sink 7 , the heat spreader 50 is entirely embedded in the base 20 . Therefore, no block for embedding a heat conducting member is formed in the heat sink 7 . As can be seen from the above, in the heat sink 7 , the heat spreader 50 does not directly contact the heat generating element 100 .

[0103] In the heat sink 7, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 7, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 7. In addition, in the heat sink 7, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 7 can be reduced. In the heat sink 7, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 7. In the heat sink 7, since the thin plate-shaped heat spreader 50 is embedded in the base 20, even if a shielding portion is formed on the second surface 22 of the base 20, the heat spreader 50 has excellent arrangement freedom, and the heat spreader 50 in the heat sink 7 also has excellent thermal connectivity. Therefore, in the heat sink 7, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 7, the heat spreader 50 spreads throughout the entire base 20, so that the entire base 20 is heat-equalized, and the heat transfer from the base 20 becomes uniform in the entire heat sink 10. Therefore, in the heat sink 7 as well, the heat load on the entire heat sink 10 is made uniform, thereby improving the efficiency of the heat sink 10 .

[0104] Next, the heat sink according to the eighth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the eighth embodiment has the same main components as the heat sinks according to the first to seventh embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to seventh embodiments. Fig.17 This is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to an eighth embodiment of the present invention.

[0105] In the heat sink 1 according to the first embodiment, the sealed injection pipe 35 used to inject the working fluid into the heat pipe 30 is provided in the inner side direction of the peripheral portion 23 of the heat sink 1. Fig.17As shown, in the heat sink 8 according to the eighth embodiment, the sealed injection pipe 35 extends outward from the peripheral portion 23 of the heat sink 8. Therefore, the sealed injection pipe 35 protrudes outward from the peripheral portion 23 of the heat sink 8.

[0106] In the heat sink 1 according to the first embodiment, the vertical dimension of the sealed injection pipe 35 is smaller than the thickness of the base portion 20. Fig.17 As shown, in the heat sink 8 according to the eighth embodiment, the dimension of the sealed injection pipe 35 in the vertical direction is larger than the thickness of the base 20. In the heat sink 8, the sealed injection pipe 35 extends from the container 33 of the heat pipe 30 toward the second surface 22 of the base 20, and protrudes from the second surface 22 in the thickness direction of the base 20.

[0107] In the radiator 8, since the front end of the sealed injection pipe 35 may be exposed to the external environment, the outer surface of the injection pipe 35 may be provided with corrosion resistance as needed. As a method for providing the outer surface of the injection pipe 35 with corrosion resistance, for example, an organic solvent having corrosion resistance may be applied to the outer surface of the injection pipe 35. As described above, the sealed injection pipe 35 may be provided in a form exposed from the radiator to the external environment, or may be provided in a form not exposed to the external environment.

[0108] Next, the heat sink according to the ninth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the ninth embodiment has the same main components as the heat sinks according to the first to eighth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to eighth embodiments. Fig.18 It is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to a ninth embodiment of the present invention. Fig.19 It is a side cross-sectional view for explaining an injection pipe used in a heat pipe provided in a heat sink according to a ninth embodiment of the present invention.

[0109] In the heat sink 1 according to the first embodiment, the sealed injection pipe 35 extends from one end of the container 33 of the heat pipe 30 extending substantially linearly toward the second surface 22. Fig.18 , 19As shown, in the heat sink 9 according to the ninth embodiment, the container 33 of the heat pipe 30 has a central portion and the other end portion extending substantially linearly in the extending direction of the base portion 20, and one end portion extending in the thickness direction of the base portion 20, and the end surface of the one end portion of the container 33 is exposed from the second surface 22. The sealed injection pipe 35 extends from the end surface of the one end portion of the container 33 in a direction perpendicular to the extending direction of the second surface 22, and the sealed injection pipe 35 protrudes from the second surface 22 as a whole.

[0110] As described above, the sealed injection pipe 35 may be arranged in the inner direction of the peripheral portion 23 of the heat sink 9 , and the sealed injection pipe 35 may be entirely located outside the base portion 20 .

[0111] In the heat sink 9, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 9, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be expanded to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 9. In addition, in the heat sink 9, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 9 can be reduced. In addition, in the heat sink 9, since the base portion 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 is prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 9. Therefore, in the heat sink 9, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base portion 20 of the heat sink 9, the heat transfer from the base portion 20 to the heat sink 10 can be smooth. In addition, in the heat sink 9, since at least a portion of the heat pipe 30 is buried, even if a shielding portion is formed on the second surface 22 of the base portion 20, the heat pipe 30 has excellent arrangement freedom, and the heat pipe 30 in the heat sink 9 also has excellent thermal connectivity. Therefore, in the heat sink 9, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 9, the heat is diffused throughout the entire base portion 20 through the heat pipe 30, so that the entire base portion 20 is thermally uniformed, and the heat transfer from the base portion 20 is uniform throughout the heat sink 10. Therefore, in the heat sink 9, the heat load of the entire heat sink 10 is uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 9, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0112] In addition, in the radiator 9, the sealed injection pipe 35 of the heat pipe 30 is also arranged in the inner direction of the peripheral portion 23 of the radiator 9, so that the sealed injection pipe 35 is located inside the structure, and the substrate on which the heating element 100 is mounted is connected to the radiator 9. Therefore, the sealed injection pipe 35 is in a form that is not exposed to the external environment of the structure. As can be seen from the above, even if the radiator 9 is set in an external environment exposed to wind and rain, the corrosion of the container 33 of the heat pipe 30 and the sealed injection pipe 35 can be prevented, thereby improving the durability of the radiator 9.

[0113] Next, the heat sink according to the tenth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the tenth embodiment has the same main components as the heat sinks according to the first to ninth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to ninth embodiments. Fig. 20 It is a schematic diagram of an injection pipe used in a heat pipe provided in a heat sink according to a tenth embodiment of the present invention. Fig.21 It is a side view for explaining an injection pipe used for a heat pipe provided in a heat sink according to a tenth embodiment of the present invention.

[0114] In the heat sink 9 according to the ninth embodiment, the container 33 of the heat pipe 30 has one end portion extending in the thickness direction of the base portion 20, and the end surface of the one end portion of the container 33 is exposed from the second surface 22. Fig. 20 , 21 As shown, in the heat sink 80 according to the tenth embodiment, the container 33 of the heat pipe 30 extends substantially linearly along the extension direction of the base portion 20, and the end surface of one end of the container 33 is exposed from the peripheral portion 23 of the heat sink 80. The sealed injection pipe 35 extends from the end surface of one end of the container 33 in a direction parallel to the extension direction of the second surface 22, and the sealed injection pipe 35 protrudes from the peripheral portion 23 of the heat sink 80 as a whole.

[0115] As described above, the sealed injection pipe 35 may be arranged outside the peripheral portion 23 of the radiator 80, and the sealed injection pipe 35 may be located outside the peripheral portion 23 as a whole. In the radiator 80, since the sealed injection pipe 35 may be exposed to the external environment, the outer surface of the injection pipe 35 may be provided with corrosion resistance as required. As a method for providing the outer surface of the injection pipe 35 with corrosion resistance, for example, a corrosion-resistant organic solvent or the like may be applied to the outer surface of the injection pipe 35.

[0116] In the heat sink 80, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 80, since the heat sink spacing of the heat sink group 11 can be reduced, the heat dissipation characteristics of the heat sink 80 can be improved by increasing the number of heat sinks 10 or increasing the space between the heat sinks 10 to improve the ventilation efficiency. In addition, in the heat sink 80, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 80 can be reduced. In addition, in the heat sink 80, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 is prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 80. Therefore, in the heat sink 80, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 80, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 80, since at least a portion of the heat pipe 30 is buried, even if a shielding portion is formed on the second surface 22 of the base 20, the heat pipe 30 has excellent arrangement freedom, and the heat pipe 30 in the heat sink 80 also has excellent thermal connectivity. Therefore, in the heat sink 80 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 80, the heat is diffused throughout the entire base portion 20 through the heat pipe 30, so that the entire base portion 20 is thermally uniformed, and the heat transfer from the base portion 20 is uniform throughout the entire heat sink 10. Therefore, in the heat sink 80 as well, the heat load of the entire heat sink 10 is uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 80 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0117] Next, the heat sink according to the 11th embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the 11th embodiment has the same main components as the heat sinks according to the 1st to 10th embodiments, the same components as the heat sinks according to the 1st to 10th embodiments are described using the same reference numerals. Fig. 22 This is a schematic diagram for explaining the arrangement of heat conduction members of a heat sink according to an eleventh embodiment of the present invention, as seen from a planar direction.

[0118] In the heat sink 1 according to the first embodiment, the heat conducting member 31 extends along the extending direction of the heat sink 10. Fig. 22 As shown, in the heat sink 81 according to the eleventh embodiment, the heat conduction member 31 having a substantially linear shape in the longitudinal direction extends at a predetermined angle relative to the extending direction of the heat sink 10. Therefore, in the heat sink 81, the heat conduction member 31 does not extend in a direction parallel to the extending direction of the heat sink 10.

[0119] Although there is no particular limitation on the angle of the heat conducting member 31 with respect to the extending direction of the heat sink 10, in the heat sink 81, the heat conducting member 31 extends in a direction substantially perpendicular to the extending direction of the heat sink 10. Similarly in the heat sink 81, the heat conducting member 31 may be, for example, a heat pipe 30. In the heat sink 81, a plurality of heat pipes 30, 30, 30, ... are arranged in parallel along the extending direction of the heat sink 10.

[0120] As described above, in the heat sink of the present invention, the arrangement of the heat conduction member 31 for uniformly heating the entire base portion 20 can be appropriately selected according to the position of the heat generating element 100 and the like.

[0121] In the heat sink 81, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 81, since the heat sink spacing of the heat sink group 11 can be reduced, the heat dissipation characteristics of the heat sink 81 can be improved by increasing the number of heat sinks 10 or increasing the space between the heat sinks 10 to improve the ventilation efficiency. In addition, in the heat sink 81, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 81 can be reduced. In addition, in the heat sink 81, since the base portion 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 is prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 81. Therefore, in the heat sink 81, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base portion 20 of the heat sink 81, the heat transfer from the base portion 20 to the heat sink 10 can be smooth. In addition, in the heat sink 81, since at least a portion of the heat pipe 30 is buried, even if a shielding portion is formed on the second surface 22 of the base portion 20, the arrangement freedom of the heat pipe 30 is excellent, and the heat pipe 30 in the heat sink 81 is also excellent in thermal connectivity. Therefore, in the heat sink 81 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 81, the heat is diffused throughout the entire base portion 20 through the heat pipe 30, so that the entire base portion 20 is thermally uniformed, and the heat transfer from the base portion 20 is uniform throughout the heat sink 10. Therefore, in the heat sink 81 as well, the heat load of the entire heat sink 10 is uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 81 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0122] Next, the heat sink according to the twelfth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the twelfth embodiment has the same main components as the heat sinks according to the first to eleventh embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to eleventh embodiments. Fig.23 This is a schematic diagram for explaining the arrangement of heat conduction members of a heat sink according to a twelfth embodiment of the present invention, as seen from a planar direction.

[0123] In the heat sink 1 according to the first embodiment, the heat conducting member 31 is substantially linear in shape in the longitudinal direction and extends in the extending direction of the heat sink 10. Fig.23 As shown, in the heat sink 82 according to the twelfth embodiment, the shape of the heat conducting member 31 in the longitudinal direction is a shape having a curved portion. The shape having a curved portion may be a U-shape, an L-shape, a U-shape, etc. in a plan view, but is not particularly limited. In the heat sink 82, a U-shape is used for convenience of description.

[0124] In the heat sink 82, the heat conduction member 31 has a central portion 93 extending substantially linearly in the extension direction of the heat sink 10, and one end portion 91 and the other end portion 92 extending substantially linearly at a predetermined angle relative to the extension direction of the heat sink 10. It should be noted that in the heat sink 82, the one end portion 91 and the other end portion 92 of the heat conduction member 31 extend in a direction substantially orthogonal to the extension direction of the heat sink 10. Similarly in the heat sink 82, as the heat conduction member 31, for example, a heat pipe 30 can be cited. In addition, in the heat sink 82, a plurality of heat pipes 30, 30, 30, ... are arranged so that the central portions 93 face each other.

[0125] As described above, in the heat sink of the present invention, the shape of the heat conduction member 31 for uniformly heating the entire base portion 20 can be appropriately selected according to the position of the heat generating element 100 and the like.

[0126] In the heat sink 82, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 82, since the heat sink spacing of the heat sink group 11 can be reduced, the heat dissipation characteristics of the heat sink 82 can be improved by increasing the number of heat sinks 10 or increasing the space between the heat sinks 10 to improve the ventilation efficiency. In addition, in the heat sink 82, since the base 20 and the heat sink 10 are independent components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 82 can be reduced. In addition, in the heat sink 82, since the base 20 and the heat sink 10 are independent components, the thickness of the heat sink 10 can be optimized, so that the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 is prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 82. Therefore, in the heat sink 82, even if a plurality of heat generating bodies 100 having various heat generation amounts are thermally connected to the base 20 of the heat sink 82, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 82, since at least a portion of the heat pipe 30 is buried, even if a shielding portion is formed on the second surface 22 of the base 20, the heat pipe 30 has excellent arrangement freedom, and the heat sink 82 also has excellent thermal connectivity. Therefore, in the heat sink 82 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 82, the heat is diffused throughout the entire base portion 20 through the heat pipe 30, so that the entire base portion 20 is thermally uniformed, and the heat transfer from the base portion 20 is uniform throughout the entire heat sink 10. Therefore, in the heat sink 82 as well, the heat load of the entire heat sink 10 is uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 82 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0127] Next, the heat sink according to the 13th embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the 13th embodiment has the same main components as the heat sinks according to the 1st to 12th embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the 1st to 12th embodiments. Fig.24 This is a schematic diagram illustrating the arrangement of the radiator fins of the radiator according to the 13th embodiment of the present invention from a top view. Fig.24 In order to facilitate the description of the arrangement of the heat sink, the description of the heat conduction member is omitted.

[0128] In the heat sink 1 according to the first embodiment, each heat sink 10 extends in a direction substantially parallel to the second direction L2 of the base portion 20 and in a direction substantially orthogonal to the first direction L1. Fig.24 As shown, in the heat sink 83 involved in the 13th embodiment, each heat sink 10 extends in a direction inclined relative to the second direction L2 of the base portion 20 and in a direction inclined relative to the first direction L1. In the heat sink 83, each heat sink 10 extends substantially linearly. In the heat sink 83, a plurality of heat sinks 10, 10, 10, ... are arranged in parallel on the first surface 21 of the base portion 20 at predetermined intervals. In addition, a plurality of heat sinks 10, 10, 10, ... are arranged in parallel at substantially equal intervals along the second direction L2. In addition, a plurality of heat sinks 10, 10, 10, ... are arranged in parallel along the first direction L1.

[0129] like Fig.24 As shown in FIG. 8 , in the heat sink 83 , each heat sink 10 is arranged to extend upward in the figure (eg, extend from bottom to top in the direction of gravity) as it moves toward the outside of the base portion 20 . Fig.24 In the embodiment, the heat sink 10 arranged on the left side of the base portion 20 is arranged to follow the outer direction of the base portion 20 ( Fig.24 In addition, the heat sink 10 arranged on the right side of the base portion 20 is arranged to follow the outer direction of the base portion 20 ( Fig.24 The device moves to the right side of the figure) and extends upward in the figure (for example, extends from bottom to top in the direction of gravity).

[0130] The angle of the extending direction of the heat sink 10 with respect to the first direction L1 of the base portion 20 is not particularly limited, but is, for example, in the range of 40° to 70°.

[0131] In the heat sink 83 , for example, when cooling air is supplied from bottom to top in the gravity direction along the second direction L2 , the cooling air flows on the first surface 21 of the base 20 toward the outside of the base 20 in the first direction L1 .

[0132] As described above, in the heat sink of the present invention, the extending direction of the heat sink 10 erected on the first surface 21 can be appropriately selected to adjust the flow direction of the cooling air on the first surface 21 of the base 20 .

[0133] Next, the radiator according to the 14th embodiment of the present invention will be described using the accompanying drawings. Since the radiator according to the 14th embodiment has the same main components as the radiators according to the 1st to 13th embodiments, the same components as the radiators according to the 1st to 13th embodiments are described using the same reference numerals. Fig.25 This is a schematic diagram illustrating the arrangement of the heat sink fins of the heat sink according to the fourteenth embodiment of the present invention from a top view. Fig.25 In order to facilitate the description of the arrangement of the heat sink, the description of the heat conduction member is omitted.

[0134] In the heat sink 83 according to the thirteenth embodiment, each heat sink 10 is arranged to extend upward in the figure (for example, from bottom to top in the direction of gravity) in accordance with the outer direction of the base portion 20, but instead, Fig.25 As shown, in the heat sink 84 according to the 14th embodiment of the present invention, each heat sink 10 is arranged to extend downward in the figure (for example, extend from top to bottom in the gravity direction) as it moves toward the outside direction of the base portion 20. As can be seen from the above, in the heat sink 84, similarly to the heat sink 83 according to the 13th embodiment, each heat sink 10 extends in a direction inclined relative to the second direction L2 of the base portion 20 and in a direction inclined relative to the first direction L1.

[0135] Specifically, in Fig.25 In the embodiment, the heat sink 10 arranged on the left side of the base portion 20 is arranged to follow the outer direction of the base portion 20 ( Fig.25 In addition, the heat sink 10 arranged on the right side of the base portion 20 is arranged to follow the outer direction of the base portion 20 ( Fig.25 The device moves to the right side of the figure) and extends downward in the figure (for example, extends from top to bottom in the direction of gravity).

[0136] The angle of the extending direction of the heat sink 10 with respect to the first direction L1 of the base portion 20 is not particularly limited, but is, for example, in the range of 40° to 70°.

[0137] In the heat sink 84 , for example, when cooling air is supplied from bottom to top in the gravity direction along the second direction L2 , the cooling air flows inward in the first direction L1 of the base 20 on the first surface 21 of the base 20 .

[0138] Next, the heat sink according to the fifteenth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the fifteenth embodiment has the same main components as the heat sinks according to the first to fourteenth embodiments, the same reference numerals are used to describe the same components as those of the heat sinks according to the first to fourteenth embodiments. Fig.26 This is a schematic diagram illustrating the arrangement of the heat sink fins of the heat sink according to the fifteenth embodiment of the present invention from a top view. Fig.26 In order to facilitate the description of the arrangement of the heat sink, the description of the heat conduction member is omitted.

[0139] In the heat sink 1 according to the first embodiment, each heat sink 10 extends in a direction substantially parallel to the second direction L2 of the base portion 20 and in a direction substantially orthogonal to the first direction L1. Fig.26 As shown, in the heat sink 85 according to the fifteenth embodiment, the inclined heat sink 10 extending in a direction inclined with respect to the second direction L2 of the base portion 20 and the parallel heat sink 10 extending in a direction substantially parallel to the second direction L2 of the base portion 20 are provided. In addition, in the heat sink 85, the composite heat sink 10 has a parallel portion extending in a direction substantially parallel to the second direction L2 of the base portion 20 and an inclined portion extending in a direction inclined with respect to the second direction L2 of the base portion 20.

[0140] In the heat sink 85, Fig.26 In the embodiment, the heat sink 10 arranged on the upper side of the base portion 20 (e.g., above the direction of gravity) is a parallel heat sink 10, and the heat sink 10 arranged on the lower side of the base portion 20 (e.g., below the direction of gravity) is an inclined heat sink 10. In addition, the parallel portion of the composite heat sink 10 is located on the upper side of the base portion 20 (e.g., above the direction of gravity), and the inclined portion is located on the lower side of the base portion 20 (e.g., below the direction of gravity). The parallel portions of the plurality of parallel heat sinks 10, 10, 10, ... and the plurality of composite heat sinks 10, 10, 10, ... are arranged in parallel at a prescribed interval. In addition, the inclined portions of the plurality of inclined heat sinks 10, 10, 10, ... and the plurality of composite heat sinks 10, 10, 10, ... are arranged in parallel at a prescribed interval.

[0141] In the heat sink 85, the inclined fins 10 and the inclined portions of the composite fins 10 arranged on the left side of the base portion 20 are arranged to follow the outer direction of the base portion 20 ( Fig.26 In addition, the inclined heat sink 10 and the inclined portion of the composite heat sink 10 arranged on the right side of the base portion 20 are arranged to follow the outer direction of the base portion 20 ( Fig.26The device moves to the right side of the figure) and extends downward in the figure (for example, extends from top to bottom in the direction of gravity).

[0142] The angle of the inclined heat sink 10 and the extending direction of the inclined portion of the composite heat sink 10 with respect to the first direction L1 of the base portion 20 is not particularly limited, but is, for example, in the range of 40° to 70°.

[0143] In the radiator 85, for example, when cooling air is supplied from bottom to top along the second direction L2 in the direction of gravity, the cooling air flows on the first surface 21 of the base portion 20 toward the inner side of the first direction L1 of the base portion 20 on the lower side (below the direction of gravity) of the base portion 20, and the cooling air flows on the first surface 21 of the base portion 20 along the second direction L2 on the upper side (above the direction of gravity) of the base portion 20.

[0144] In the heat sinks 83, 84, and 85, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sinks 83, 84, and 85, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sinks 83, 84, and 85. In addition, in the heat sinks 83, 84, and 85, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be designed to be optimal by reducing the thickness of the heat sink 10 compared to when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sinks 83, 84, and 85 can be reduced. In addition, in the heat sinks 83, 84, and 85, since the base 20 and the fins 10 are independent components, the thickness of the fins 10 can be optimized, and thus the gaps between the plurality of fins 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the fin group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sinks 83, 84, and 85. Therefore, in the heat sinks 83, 84, and 85, even if a plurality of heat generating bodies 100 having various heat generating amounts are thermally connected to the base 20 of the heat sinks 83, 84, and 85, the heat transfer from the base 20 to the fins 10 can be smooth. In addition, in the heat sinks 83, 84, and 85, since at least a part of the heat conduction member is buried, even if the shielding portion is formed on the second surface 22 of the base 20, the degree of freedom of arrangement of the heat conduction member is excellent, and the heat conduction member in the heat sinks 83, 84, and 85 also has excellent thermal connectivity. Therefore, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base 20 of the heat sinks 83, 84, and 85, the heat is diffused throughout the base 20 through the heat conduction member, so that the base 20 is uniformly heated, and the heat transfer from the base 20 is uniform throughout the heat sink 10. Therefore, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the heat sink 83, 84, and 85, the heat dissipation characteristics are improved.

[0145] Next, the heat sink according to the sixteenth embodiment of the present invention will be described using the accompanying drawings. Since the heat sink according to the sixteenth embodiment has the same main components as the heat sinks according to the first to fifteenth embodiments, the same components as those of the heat sinks according to the first to fifteenth embodiments are described using the same reference numerals. Fig. 27 It is a side cross-sectional view of a heat sink according to a sixteenth embodiment of the present invention.

[0146] In the heat sink 1 according to the first embodiment, the entire heat conduction member 31 is embedded in the heat sink 1, and the heat conduction member 31 is thermally connected to the heat generating element 100 via the base portion 20. Fig. 27 As shown, in the heat sink 86 according to the sixteenth embodiment, the heat conduction member 31 is thermally connected to the heat generating element 100 via the block member 95 which is a member different from the base portion 20. In the heat sink 86, the block member 95 is connected to the portion of the heat conduction member 31 facing the heat generating element 100, and the block member 95 is also thermally connected to the heat generating element 100. As can be seen from the above, in the heat sink 86, the heat of the heat generating element 100 is transferred from the heat generating element 100 to the block member 95, and the heat transferred from the heat generating element 100 to the block member 95 is transferred from the block member 95 to the heat conduction member 31.

[0147] Similarly, in the heat sink 86, the portion of the heat conduction member 31 to which the block member 95 is not connected is embedded in the heat sink 86 (the block portion 40 of the base portion 20 in the heat sink 86) by casting. Therefore, in the portion of the heat conduction member 31 to which the block member 95 is not connected, the entire outer peripheral surface of the heat conduction member 31 is embedded in the block portion 40 of the base portion 20 by casting. In addition, by connecting the block member 95 to the portion of the heat conduction member 31 that is opposite to the heating element 100, the heat conduction member 31 is entirely embedded in the heat sink 86. The block member 95 is thermally connected to the heat conduction member 31 by being embedded in the recess 96 provided on the second surface 22 of the base portion 20. In addition, the block member 95 can be joined to the heat conduction member 31 as needed. Examples of joining methods include brazing and soldering.

[0148] The portion of the block-shaped component 95 that is opposite to the heating element 100 is located on the same plane as the second surface 22 of the base portion 20. Therefore, the portion 97 that is the portion of the block-shaped component 95 that is opposite to the heating element 100 and that extends from the surface of the base portion 20 becomes a planar portion that is located on the same plane as the second surface 22. The surface extension portion 97 of the block-shaped component 95 is in contact with the heating element 100, so that the block-shaped component 95 is thermally connected to the heating element 100. It should be noted that the block-shaped component 95 may also have a convex portion that protrudes from the second surface 22 of the base portion 20 in the thickness direction of the base portion 20. That is, the portion of the block-shaped component 95 that is opposite to the heating element 100 may protrude from the second surface 22 of the base portion 20, and the convex portion of the block-shaped component 95 may be in contact with the heating element 100, so that the block-shaped component 95 is thermally connected to the heating element 100.

[0149] As the block member 95, a solid member having thermal conductivity can be cited. In addition, as the material of the block member 95, for example, metals such as copper and copper alloy can be cited. In the heat sink 86, as the heat conduction member 31, as in the above-mentioned embodiments, a heat pipe 30 can be cited.

[0150] In the heat sink 86, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be made thinner than when the base 20 and the heat sink 10 are integrally formed, and the thickness of the heat sink 10 can be designed to be optimal to meet the performance requirements. Therefore, in the heat sink 86, since the heat sink spacing of the heat sink group 11 can be reduced, the number of heat sinks 10 can be increased, or the space between the heat sinks 10 can be enlarged to improve the ventilation efficiency, thereby improving the heat dissipation characteristics of the heat sink 86. In addition, in the heat sink 86, since the base 20 and the heat sink 10 are separate components, the heat sink 10 can be designed to be optimal by making the thickness of the heat sink 10 thinner than when the base 20 and the heat sink 10 are integrally formed, and the weight of the heat sink 86 can be reduced. In the heat sink 86, since the base 20 and the heat sink 10 are separate components, the thickness of the heat sink 10 can be optimized, and thus the gaps between the plurality of heat sinks 10, 10, 10, ... can be reliably ensured, and the pressure loss of the cooling air supplied to the heat sink group 11 can be prevented from increasing, thereby improving the heat dissipation characteristics of the heat sink 86. Therefore, in the heat sink 86, even if a plurality of heat generating bodies 100 having various heat generating amounts are thermally connected to the base 20 of the heat sink 86, the heat transfer from the base 20 to the heat sink 10 can be smooth. In addition, in the heat sink 86, since at least a portion of the heat conduction member 31 (heat pipe 30) is buried, even if a shielding portion is formed on the second surface 22 of the base 20, the degree of freedom of arrangement of the heat conduction member 31 (heat pipe 30) is excellent, and the heat conduction member 31 (heat pipe 30) in the heat sink 86 is also excellent in thermal connectivity. Therefore, in the heat sink 86 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected to the base portion 20 of the heat sink 86, the heat is diffused throughout the base portion 20 through the heat conduction member 31 (heat pipe 30), so that the entire base portion 20 is thermally uniformed, and the heat transfer from the base portion 20 is uniform throughout the heat sink 10. Therefore, in the heat sink 86 as well, the heat load of the entire heat sink 10 is uniform, thereby improving the efficiency of the heat sink 10. As can be seen from the above, in the heat sink 86 as well, even if a plurality of heating elements 100 having various heat outputs are thermally connected, the heat dissipation characteristics are improved.

[0151] Next, other embodiments of the heat sink of the present invention are described. In the heat sinks of the above-mentioned embodiments, as heat-conducting members, heat pipes or heat spreaders as heat transport members are used, but as long as they are members with thermal conductivity, there is no particular limitation, and instead of heat transport members, solid rod-shaped members or plate-shaped members made of metal (for example, copper), solid rod-shaped members or plate-shaped members made of graphite may be used. In addition, in the heat sinks of the above-mentioned embodiments, the heat pipes are buried in the block, but instead, the heat pipes may be buried in the base as a whole.

[0152] In addition, in the heat sinks of the above-mentioned embodiments, the shape of the base portion is a quadrilateral in a plan view (a state when viewed from a position opposite to the heat sink), but the shape of the base portion can be appropriately selected according to the use conditions of the heat sink, etc., and can be a shape with a curved portion, a shape with a cutout portion, etc. in a plan view. In addition, in the heat sinks of the above-mentioned embodiments, the heat sink extends approximately linearly from one end to the other end of the second direction of the base portion, but the shape of the heat sink in the second direction of the base portion is not particularly limited, and instead, it can be set to a shape with a curved portion.

[0153] In addition, in the radiator of the first embodiment, the vertical dimension of the sealed injection pipe has a dimension smaller than the thickness of the base portion, but alternatively, it can be set to have a dimension larger than the thickness of the base portion and the front end of the sealed injection pipe protrudes from the second surface of the base portion. Industrial Applicability

[0154] The heat sink of the present invention has excellent heat equalization of the base portion and freedom of arrangement of the heat conduction components, and can design the heat sink to an optimal thickness. Therefore, it has high utilization value in the field of cooling heat generating elements mounted on a substrate used in, for example, a mobile phone base station, on which a large number of electronic components with relatively low heat generation and electronic components with relatively high heat generation are complexly arranged. Explanation of symbols

[0155] 1, 2, 3, 4, 5, 6, 7, 8, 9: heat sink; 80, 81, 82, 83, 84, 85, 86: heat sink; 10: heat sink; 14: boundary portion; 20: base portion; 21: first surface; 22: second surface; 30, 70: heat pipe; 50: heat spreader.

Claims

1. A radiator, characterized in that: include: A base portion having a first surface and a second surface opposite to the first surface, wherein the heating element is thermally connected to the second surface; and a heat sink, which is vertically arranged on the first surface of the base portion, The base portion and the heat sink are independent components. At least a portion of the heat conduction member is buried in the heat sink so as not to be exposed from the second surface.

2. The heat sink according to claim 1, wherein: A block portion is provided which extends in the extending direction of the base portion, and at least a part of the heat conduction member is buried in the block portion.

3. The heat sink according to claim 1, wherein: The heat conduction member is buried in the base portion.

4. The heat sink according to claim 2, wherein: The block portion is a convex portion of the first surface of the base portion that protrudes from the first surface in the thickness direction of the base portion.

5. The heat sink according to claim 4, wherein: The heat sink fins are erected on the block portion and are lower than the heat sink fins erected on the first surface other than the block portion.

6. The heat sink according to claim 5, wherein: The heat sinks vertically arranged on the block portion are flush with the heat sinks vertically arranged on the first surface outside the block portion.

7. The heat sink according to claim 2, wherein: The block portion is a convex portion of the second surface of the base portion that protrudes from the second surface of the base portion in a thickness direction of the base portion.

8. The heat sink according to claim 2, wherein: The heat sink has a front end portion in a height direction of the heat sink and a base portion as a rising start portion rising from the base portion, and the block portion is provided in a middle portion between the front end portion and the base portion of the heat sink.

9. The heat sink according to any one of claims 1 to 8, wherein: The heat conduction member includes a heat receiving portion thermally connected to the heat generating element.

10. The heat sink according to any one of claims 1 to 8, wherein: The heat conduction member is entirely buried in the heat sink.

11. The heat sink according to claim 1, wherein: At least a partial region of the heat conduction member has an exposed portion exposed from the second surface of the base portion, and the exposed portion is in direct contact with the heat generating element.

12. The heat sink according to claim 7, wherein: At least a partial region of the heat conduction member has an exposed portion exposed from the convex portion of the second surface, and the exposed portion is in direct contact with the heat generating element.

13. The heat sink according to any one of claims 1 to 8, wherein: The heat conduction member extends along an extending direction of the base portion.

14. The heat sink according to claim 11 or 12, wherein: The heat conduction member has a stepped portion bent in a thickness direction of the base portion, and the exposed portion is formed by the stepped portion.

15. The heat sink according to claim 11 or 12, wherein: The heat conduction member has a protruding portion protruding in a thickness direction of the base portion, and the exposed portion is formed by the protruding portion.

16. The heat sink according to any one of claims 1 to 8, wherein: The heat conduction component is a heat pipe or a heat sink.

17. The heat sink according to any one of claims 1 to 8, wherein: A portion of the heat sink is a casting member, and the heat conducting member is embedded in the casting member by insert casting.

18. The heat sink according to claim 16, wherein: A sealed injection pipe used to inject a working fluid into the heat pipe or the vapor chamber is provided in an inner direction with respect to a peripheral portion of the heat sink.

19. The heat sink according to claim 16, wherein: The heat pipe is a flat heat pipe that has been flattened.

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