WO2019168145A1 - Dissipateur thermique - Google Patents

Dissipateur thermique Download PDF

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Publication number
WO2019168145A1
WO2019168145A1 PCT/JP2019/008029 JP2019008029W WO2019168145A1 WO 2019168145 A1 WO2019168145 A1 WO 2019168145A1 JP 2019008029 W JP2019008029 W JP 2019008029W WO 2019168145 A1 WO2019168145 A1 WO 2019168145A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat pipe
heating element
pipe
predetermined
Prior art date
Application number
PCT/JP2019/008029
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English (en)
Japanese (ja)
Inventor
川畑　賢也
義勝 稲垣
Original Assignee
古河電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 古河電気工業株式会社 filed Critical 古河電気工業株式会社
Publication of WO2019168145A1 publication Critical patent/WO2019168145A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427—Cooling by change of state, e.g. use of heat pipes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present invention relates to a heat sink for cooling a heating element, and more particularly to a heat pipe heat sink.
  • heating elements such as electronic components are mounted with high density inside the electronic device.
  • a heat sink provided with a heat pipe heat pipe type heat sink
  • the heat sink for example, there has been proposed a heat pipe heat sink that protrudes in the radial direction on the outer peripheral surface of a heat pipe provided with a plurality of flat plate-like heat radiating fins (Patent Document 1).
  • Patent Document 1 a plurality of heat pipes are arranged in parallel along the flow direction of cooling air supplied from a fan for forced air cooling. That is, the plurality of heat pipes are provided with a heat pipe in which the condensing part is disposed on the leeward side of the cooling air and a heat pipe in which the condensing part is disposed on the leeward side of the cooling air.
  • the heat pipe in which the evaporation unit is attached at a position near the heating element to be cooled has a larger amount of heat input from the heating element than the heat pipe in which the evaporation part is attached at a position far from the heating element. Therefore, a better maximum heat transport amount is required.
  • the maximum heat transport amount of the heat pipe is improved when the operating temperature of the heat pipe is high. This is because the higher the operating temperature of the heat pipe, the lower the viscosity of the working fluid sealed in the heat pipe and the lower the flow resistance of the working fluid.
  • Patent Document 1 the plurality of heat pipes are arranged in parallel so that their longitudinal directions are substantially parallel, and one end of each heat pipe is thermally connected to the heating unit and the other end is It is only thermally connected to the radiating fins. Therefore, since there may be a case where a more excellent maximum heat transport amount cannot be given to a heat pipe having a large amount of heat input from the heating element, there is room for improvement in the heat dissipation characteristics of the heat sink.
  • the present invention provides cooling heat by providing a higher maximum heat transport amount to a heat pipe having a relatively large amount of heat input from a heating element to be cooled among a plurality of heat pipes. It aims at providing the heat sink which can exhibit the outstanding cooling performance with respect to object.
  • aspects of the present invention include a heat receiving portion thermally connected to a heating element, a plurality of heat pipes thermally connected to the heat receiving portion at predetermined portions, and the predetermined portions of the plurality of heat pipes.
  • a heat dissipating part thermally connected to another part different from the above, and among the plurality of heat pipes, the predetermined part extends from at least a part of the predetermined part or an end of the predetermined part.
  • the other part of the first heat pipe in which a virtual straight line extending along the direction overlaps a part having a high heat generation density of the heating element in a plan view is from the predetermined part or an end of the predetermined part.
  • the imaginary straight line extended along the extending direction of the predetermined part has a cooling air leeward than the other part of the second heat pipe in which the imaginary straight line does not overlap with the part having a high heat generation density of the heating element in plan view.
  • Heat provided on the side It is a link.
  • the predetermined part is the evaporation part, and the heat from the heating element is released to the heat radiation part at the other part. It is a condensing part.
  • the “plan view” means a state viewed from the direction orthogonal to the heat transport direction of the heat pipe and from the direction orthogonal to the arrangement direction of predetermined portions of the heat pipe.
  • An aspect of the present invention is a heat sink having an intersecting portion where the first heat pipe and the second heat pipe intersect in a plan view.
  • An aspect of the present invention includes an intermediate portion of the first heat pipe between the predetermined portion and the other portion, and the predetermined portion and the other portion of the second heat pipe.
  • the intermediate part located between them is a heat sink having an intersecting part intersecting in plan view.
  • An aspect of the present invention is a heat sink in which the first heat pipe and / or the second heat pipe are flattened at the intersection.
  • An aspect of the present invention is a heat sink in which the predetermined portion is one end portion in the longitudinal direction of the heat pipe and the other portion is the other end portion in the longitudinal direction of the heat pipe.
  • An aspect of the present invention is a heat sink in which the predetermined part is a central part in the longitudinal direction of the heat pipe, and the other part is one end and the other end in the longitudinal direction of the heat pipe. is there.
  • the imaginary straight line extending along the extending direction of the evaporation unit from at least a part of the evaporation unit or the end of the evaporation unit has a high heat generation density of the heating element.
  • the imaginary straight line in which the condensing part of the first heat pipe that overlaps with the part in plan view extends along the extending direction of the evaporating part from the evaporating part or the end of the evaporating part is flat with the part having a high heat generation density of the heating element
  • the operating temperature of the first heat pipe is higher than the operating temperature of the second heat pipe by being provided on the leeward side of the cooling air from the condensing part of the second heat pipe that does not overlap in view.
  • the maximum heat transport amount of the first heat pipe is improved more than the maximum heat transport amount of the second heat pipe.
  • the first heat pipe having a relatively large amount of heat input from the heating element is given a more excellent maximum heat transport amount, and as a result, excellent for the object to be cooled.
  • a heat sink capable of exhibiting cooling performance can be obtained.
  • the heating element to be cooled is thermally connected to the central portion of the heat receiving portion by including the intersecting portion where the first heat pipe and the second heat pipe intersect in plan view. Even if it is, the condensation part of the 1st heat pipe can be arranged in the leeward side of cooling air rather than the condensation part of the 2nd heat pipe.
  • the first heat pipe and / or the second heat pipe is flattened at the intersection, the thickness of the intersection can be reduced and the heat sink can be made compact. . Therefore, a heat sink can be installed even in a narrow space.
  • the heat sink 1 includes a heat receiving plate 31 that is thermally connected to a heating element 100 that is a cooling target, and a plurality of heat receiving plates 31 that are thermally connected to the heat receiving plate 31. (In FIG. 1, three) heat pipes 11 are provided. The plurality of heat pipes 11 are all thermally connected to the common heat radiating portion 20 of the heat sink 1.
  • the heat pipe 11 is a heat transport member in which a working fluid is sealed inside a container made of a long tube material.
  • the container is a sealed container, and the inside of the container is in a decompressed state.
  • the longitudinal direction of the heat pipe 11 is the heat transport direction of the heat pipe 11.
  • the plurality of heat pipes 11 are arranged in parallel in a direction substantially orthogonal to the longitudinal direction of the heat pipes 11 to form a heat pipe group 12. Each of the plurality of heat pipes 11 is opposed to another adjacent heat pipe 11 at the side portion. Each of the plurality of heat pipes 11 has one end 13 thermally connected to the heating element 100, so that one end of the heat pipe group 12 is thermally connected to the heating element 100. Has been. In the heat sink 1, one end 13 of the heat pipe 11 indirectly contacts the surface of the heating element 100 via the flat heat receiving plate 31, so that the one end 13 of the heat pipe 11 and the heating element 100 are Are thermally connected.
  • one end 13 of the heat pipe 11 is thermally connected to the heat receiving plate 31 and functions as an evaporation unit by being thermally connected to the heat receiving plate 31.
  • the longitudinal direction of one end 13 of the heat pipe 11 extends along the planar direction of the heat receiving plate 31.
  • the first heat pipe 11-1 located at the center of the parallel arrangement has one end 13 connected to the heating element 100. It is provided in the position which overlaps in planar view. Therefore, one end 13 of the first heat pipe 11-1 is provided at a position overlapping with a portion having a high heat generation density, which is a hot spot of the heating element 100, in a plan view. In FIG. 1, for the sake of convenience, the entire heating element 100 is a portion having a high heat generation density.
  • the number of the first heat pipes 11-1 provided at the position where one end 13 overlaps the heating element 100 in plan view is not particularly limited, and the number of the first heat pipes 11-1 is one.
  • the second arranged at both sides of the first heat pipe 11-1 (that is, positions at both ends of the parallel arrangement at one end of the heat pipe group 12).
  • the heat pipe 11-2 is provided at a position where one end 13 of the heat pipe 11-2 does not overlap the heating element 100 in plan view. Therefore, one end 13 of the second heat pipe 11-2 is provided at a position where it does not overlap with the high heat generation density portion of the heating element 100 in plan view.
  • the number of the second heat pipes 11-2 provided at a position where one end portion 13 does not overlap the heating element 100 in a plan view is not particularly limited.
  • the number of the first heat pipes 11-1 is not limited. One is provided on each side.
  • the first heat pipe 11-1 is the heat pipe 11 in which the amount of heat input from the heating element 100 is larger than that of the second heat pipe 11-2.
  • all of the plurality of heat pipes 11 have the other end portion 14 thermally connected to the heat radiating portion 20, so that the other end portion of the heat pipe group 12 radiates heat.
  • the unit 20 is thermally connected. Therefore, the other end 14 of the heat pipe 11 functions as a condensing part.
  • the heat radiating portion 20 has a substantially rectangular parallelepiped shape.
  • the other end portions 14 of the plurality of heat pipes 11 are arranged in parallel in the heat radiating portion 20 in a direction substantially orthogonal to the longitudinal direction of the heat pipe 11.
  • Each of the other end portions 14 of the plurality of heat pipes 11 faces the other end portion 14 of another adjacent heat pipe 11 at the side portion.
  • a bent portion 15 is formed in front of a portion of the first heat pipe 11-1 and the second heat pipe 11-2 that are thermally connected to the heat radiating portion 20. Accordingly, the first heat pipe 11-1 and the second heat pipe 11-2 are both substantially L-shaped in plan view.
  • the bent portion 15 of the first heat pipe 11-1 and the bent portion of the second heat pipe 11-2 are corresponding to the fact that the heat pipe 11 is introduced into the heat radiating portion 20 from the left end portion of the heat radiating portion 20. All of the portions 15 are bent in the right direction.
  • the first heat pipe 11-1 and the second heat pipe 11-2 have the other end portion 14 in a direction substantially parallel to the longitudinal direction of the heat radiating portion 20 whose outer shape is a substantially rectangular parallelepiped due to the bent portion 15. It has become the mode which is distracted.
  • the heat dissipating unit 20 includes a plurality of heat dissipating fins 21.
  • the heat radiation fin 21 is a thin flat plate-like member.
  • the radiating fins 21 are arranged in parallel at predetermined intervals in a direction substantially parallel to the longitudinal direction of the radiating portion 20.
  • the main surface of the radiation fin 21 is a surface that mainly exhibits the heat radiation function of the radiation fin 21.
  • the main surface of each radiating fin 21 is disposed so as to be substantially orthogonal to the other end portion 14 of the heat pipe 11 that is linear in plan view. Therefore, the main surface of the radiating fin 21 forms the short direction of the radiating portion 20.
  • the heat sink 1 is forcibly cooled by a blower fan (not shown). Cooling air F derived from the blower fan is supplied to the heat radiating unit 20 along the short direction of the heat radiating unit 20.
  • the first heat pipe 11-1 and the second heat pipe 11-2 are provided with an intersecting portion 16 that intersects in plan view.
  • the first heat pipe 11-1 forms an intersection 16 with one of a plurality (two in FIG. 1) of second heat pipes 11-2.
  • the first heat pipe 11-1 forms an intersection 16 with the second heat pipe 11-2 whose one end 13 is located on the outer surface of the heat pipe group 12 arranged in parallel.
  • the first heat pipe 11-1 whose one end 13 is located in the center of the parallel arrangement of the heat pipe group 12 is the second heat pipe whose one end 13 is located on the outer surface of the parallel arrangement of the heat pipe group 12.
  • the other end portion 14 of the first heat pipe 11-1 is located on the outer surface of the parallel arrangement of the heat pipe group 12, and the second end portion 13 is located on the outer side.
  • the cooling air F is located below the other end 14 of the pipe 11-2.
  • the second heat pipe 11-2 whose one end 13 is located on the inner surface of the heat pipe group 12 arranged in parallel is the first heat pipe 11-1. Even if the intersection is not formed, the other end 14 is located on the most upstream side of the cooling air F. Therefore, the second heat pipe 11-2 whose one end 13 is located on the inner surface of the parallel arrangement of the heat pipe group 12 does not form the intersection 16 with the first heat pipe 11-1.
  • the first heat pipe 11-1 has a plurality of second heat pipes 11-2 extending from the center of the parallel arrangement of the heat pipe groups 12 toward the end of the outer surface in the direction from the one end 13 to the other end 14. One of them intersects at the intersection 16 from the end of the outer surface of the parallel arrangement of the heat pipe group 12 to the center in the direction from the one end 13 to the other end 14 so that the first heat
  • the other end portion 14 of the pipe 11-1 is located further down the cooling air F than the other end portion 14 of the second heat pipe 11-2. Accordingly, the other end portion 14 of the first heat pipe 11-1 is located more downstream of the cooling air F than the other end portion 14 of any second heat pipe 11-2.
  • the first heat pipe 11-1 and / or the second heat pipe 11-2 may be flattened. Since the first heat pipe 11-1 and / or the second heat pipe 11-2 is flattened at the intersecting portion 16, the thickness of the intersecting portion 16 can be reduced and the heat sink 1 can be made compact. As a result, the heat sink 1 can be installed even in a narrow space, particularly a space where the thickness direction is narrow.
  • the material of the heat radiation fin 21 is not particularly limited, and examples thereof include metals such as copper, copper alloy, aluminum, and aluminum alloy.
  • the material of the container of the heat pipe 11 is not particularly limited, and examples thereof include metals such as copper, copper alloy, aluminum, aluminum alloy, and stainless steel.
  • the working fluid sealed in the heat pipe 11 can be appropriately selected according to the material of the container, and examples thereof include water, alternative chlorofluorocarbon, perfluorocarbon, and cyclopentane.
  • heat is transmitted from the heating element 100 to one end 13 of the heat pipe 11 through the heat receiving plate 31.
  • the transmitted heat is transferred along the longitudinal direction of the heat pipe 11 by the heat transporting action of the heat pipe 11. It is transported from one end 13 to the other end 14 which is a condensing part.
  • the first heat pipe 11-1 having a larger amount of heat input from the heating element 100 than the second heat pipe 11-2 contributes to more heat transport.
  • the heat transported to the other end portion 14 of the heat pipe 11 is transmitted from the other end portion 14 of the heat pipe 11 to the heat radiating portion 20, and the heat transmitted to the heat radiating portion 20 is released from the heat radiating portion 20 to the outside. Is done.
  • the heat generating body 100 is cooled by releasing the heat of the heat generating body 100 from the heat radiating unit 20 to the outside.
  • the condensing part (the other end part 14) of the first heat pipe 11-1 having a larger amount of heat input from the heating element 100 than the second heat pipe 11-2 is condensing by the second heat pipe 11-2.
  • the operating temperature of the first heat pipe 11-1 is higher than the operating temperature of the second heat pipe 11-2.
  • the flow of the working fluid inside the heat pipe 11 is facilitated.
  • the maximum heat transport amount is improved more than the maximum heat transport amount of the second heat pipe 11-2.
  • the first heat pipe 11-1 having a relatively large amount of heat input from the heating element is given a superior maximum heat transport amount, and as a result, the heat sink 1 Then, it is possible to exhibit excellent cooling performance for the object to be cooled.
  • one end portion 13 of the heat pipe 11 functions as an evaporation portion
  • the other end portion 14 functions as a condensation portion
  • the one end portion 13 functions as a heat receiving plate 31.
  • the central portion 17 of the heat pipe 11 functions as an evaporation portion
  • one end portion 13 and the other end portion 14 are condensed.
  • the heat receiving plate 31 extends from one end 13 to the other end 14 of the heat pipe 11.
  • the heating element 100 is thermally connected to the approximate center of the heat receiving plate 31.
  • a plurality of (three in FIG. 2) heat pipes 11 are arranged in parallel in a direction substantially orthogonal to the longitudinal direction of the heat pipes 11 to form a heat pipe group 12.
  • the heating element 100 is thermally connected to the central portion 17 of the heat pipe 11 in response to the heating element 100 being thermally connected to the approximate center of the heat receiving plate 31. Therefore, the center part 17 of the heat pipe 11 functions as an evaporation part.
  • the first heat pipe 11-1 located at the center of the parallel arrangement at the center in the longitudinal direction of the heat pipe group 12 has a central portion 17 that is connected to the heating element 100. It is provided in the position which overlaps in planar view.
  • the second heat pipe 11-2 arranged on both sides of the heat pipe group 12 (that is, the positions of both ends of the parallel arrangement in the central portion in the longitudinal direction of the heat pipe group 12) has a central portion 17 having a heating element. It is provided at a position that does not overlap with 100 in plan view.
  • the cooling air F is supplied to one end 13 and the other end 14 of the heat pipe 11. Therefore, one end 13 and the other end 14 of the heat pipe 11 function as a condensing part.
  • a plurality of heat radiation fins 21 are erected on the heat receiving plate 31 to form the heat radiation portion 20.
  • the heat radiating fins 21 are arranged in parallel on the heat receiving plate 31 at predetermined intervals.
  • the heat radiating fins 21 are arranged in parallel from a portion corresponding to one end 13 of the heat pipe 11 to a portion corresponding to the other end 14.
  • the central portion 17 of the heat pipe 11 functions as an evaporation portion, and the one end portion 13 and the other end portion 14 function as a condensing portion.
  • the second heat sink 11-2 forming the intersecting portion 16-1 also intersects with the second heat sink 11-2 forming the intersecting portion 16-1 between the central portion 17 and the other end portion 14 of the first heat pipe 11-1.
  • An intersection 16-2 is provided.
  • the first heat pipe 11-1 forms intersections 16-1 and 16-2 with the second heat pipe 11-2 that is located at the most leeward side of the cooling air F among the plurality of second heat pipes 11-2. ing.
  • the first heat pipe 11-1 extends from the center of the parallel arrangement of the heat pipe group 12 in the direction of the one end 13 from the center 17 to the end of the leeward surface. One crosses in the direction of one end 13 from the central portion 17 from the end of the leeward surface of the heat pipe group 12 arranged in parallel to the central direction at the intersecting portion 16-1, so that the first heat pipe 11
  • the one end 13 of -1 is located further down the cooling air F than the one end 13 of the second heat pipe 11-2. Accordingly, one end 13 of the first heat pipe 11-1 is located further down the cooling air F than one end 13 of any second heat pipe 11-2.
  • the first heat pipe 11-1 has a plurality of second heat pipes 11-2 extending from the center of the parallel arrangement of the heat pipe groups 12 to the end direction of the leeward surface in the direction of the other end portion 14 from the center portion 17. One of them crosses at the intersection 16-2 from the end of the leeward surface of the parallel arrangement of the heat pipe group 12 in the direction of the other end 14 from the center 17 at the intersection 16-2.
  • the other end portion 14 of the pipe 11-1 is located further down the cooling air F than the other end portion 14 of the second heat pipe 11-2. Accordingly, the other end portion 14 of the first heat pipe 11-1 is located more downstream of the cooling air F than the other end portion 14 of any second heat pipe 11-2.
  • the maximum heat transport amount of the first heat pipe 11-1 is the second heat pipe 11-1.
  • the maximum heat transport amount of the pipe 11-2 is improved. From the above, among the plurality of heat pipes 11, the first heat pipe 11-1 having a relatively large amount of heat input from the heating element is given a superior maximum heat transport amount, and as a result, the heat sink 2 However, it is possible to exhibit excellent cooling performance for the heating element 100 that is a cooling target.
  • the longitudinal direction of the heat pipe 11 extends along the planar direction of the heat receiving plate 31, but instead of this, as shown in FIG.
  • a plurality of heat pipes 11 are erected on the heat receiving plate 31. That is, the heat sink 3 is a tower type heat sink.
  • the heat pipe 11 extends in the vertical direction with respect to the flat portion of the heat receiving plate 31.
  • the heating element 100 is thermally connected to the approximate center of the heat receiving plate 31.
  • a plurality (three in FIG. 3) of heat pipes 11 are arranged in parallel in a direction substantially orthogonal to the longitudinal direction (the standing direction) of the heat pipes 11 to form a heat pipe group 12.
  • the heating element 100 is thermally connected to the heat receiving plate 31
  • the heating element 100 is thermally connected to the heat receiving part side base 33 of the heat pipe 11. Therefore, the heat receiving part side base 33 of the heat pipe 11 functions as an evaporation part.
  • the first heat pipe 11-1 located at the center of the parallel arrangement in the heat receiving part side base of the heat pipe group 12 is the end of the heat receiving part side base 33.
  • the virtual straight line L extended along the extending direction of the heat receiving part side base 33 is provided at a position overlapping the heating element 100 in plan view. Accordingly, the heat receiving portion side base 33 of the first heat pipe 11-1 is provided at a position where the virtual straight line L overlaps with the portion of the heat generating element 100 where the heat generation density is high in plan view.
  • the entire heating element 100 is a portion having a high heat generation density.
  • the second heat pipe 11-2 arranged on both sides of the heat pipe group 12 (that is, the positions of both ends of the parallel arrangement in the heat receiving part side base of the heat pipe group 12) is connected to the heat receiving part side base 33.
  • An imaginary straight line L that extends from the end portion along the extending direction of the heat receiving portion side base portion 33 is provided at a position that does not overlap the heating element 100 in plan view. Therefore, the heat receiving portion side base portion 33 of the second heat pipe 11-2 is provided at a position where the virtual straight line L does not overlap the portion of the heating element 100 where the heat generation density is high in plan view.
  • the heat radiating portion 20 is formed by attaching the heat radiating fins 21 to the heat pipe 11. Moreover, the site
  • the attachment position of the radiation fin 21 is not particularly limited, in the heat sink 3, the plurality of radiation fins 21 are attached from the front end portion 34 to the longitudinal center portion 37 of the heat pipe 11. The heat radiating fins 21 are arranged in parallel at a predetermined interval substantially parallel to the extending direction of the heat pipe 11. Further, the cooling air F is mainly supplied from the front end portion 34 of the heat pipe 11 to the central portion 37 in the longitudinal direction.
  • the heat receiving part side base 33 of the heat pipe 11 functions as an evaporating part, and functions as a condensing part from the tip part 34 to the longitudinal center part 37. Between the direction center portion 37 and the heat receiving portion side base portion 33 (intermediate portion), it intersects with one of a plurality (two in FIG. 3) of the second heat pipes 11-2 in a plan view. An intersection 16 is provided.
  • the first heat pipe 11-1 forms an intersecting portion 16 with the second heat pipe 11-2 located at the leemost side of the cooling air F among the plurality of second heat pipes 11-2.
  • the first heat pipe 11-1 includes a plurality of second heat pipes 11-2 from the center of the parallel arrangement of the heat pipe groups 12 toward the end of the leeward surface in the direction from the heat receiving part side base 33 to the tip 34.
  • One of the first heat pipes 11-1 intersects from the end of the leeward surface of the heat pipe group 12 arranged in parallel to the center in the direction from the heat receiving part side base 33 to the tip part 34 at the crossing part 16.
  • the front end portion 34 and the longitudinal center portion 37 of the second heat pipe 11-2 are located further down the cooling air F than the front end portion 34 and the longitudinal center portion 37 of the second heat pipe 11-2. Therefore, the front end portion 34 and the longitudinal center portion 37 of the first heat pipe 11-1 are positioned more downstream of the cooling air F than the front end portion 34 and the longitudinal center portion 37 of any second heat pipe 11-2. doing.
  • the operating temperature of the first heat pipe 11-1 is higher than the operating temperature of the second heat pipe 11-2.
  • the amount is higher than the maximum heat transport amount of the second heat pipe 11-2.
  • the number of heat pipes constituting the heat pipe group was three. However, if the number of heat pipes in the heat pipe group is plural, depending on the amount of heat generated by the heating element, etc. It can be selected as appropriate, and may be two or four or more. Moreover, in each said embodiment, although the 1st heat pipe was one, the number of the 1st heat pipe is not specifically limited, Two or more may be sufficient. Moreover, in each said embodiment, although the 2nd heat pipe was two, the number of the 2nd heat pipe is not specifically limited, One may be sufficient and three or more may be sufficient.
  • the central portion of the first heat pipe and the central portion of the second heat pipe intersect in a plan view to form an intersecting portion.
  • the one end of the first heat pipe and the one end of the second heat pipe may intersect in a plan view to form an intersection, and the other end of the first heat pipe, The other end of the second heat pipe may intersect with each other in plan view to form an intersection.
  • the imaginary line extended from the evaporation portion or the evaporation portion of the first heat pipe corresponding to the heat generation density of the center portion of the heating element is flat with the center portion of the heating element.
  • the first heat pipes were arranged so as to overlap in view.
  • the imaginary line extended from the evaporating part or the evaporating part of the first heat pipe is arranged at a position overlapping with a part having a high heat generation density in a plan view in the heating element. Therefore, when the high heat generation density portion of the heating element is other than the central portion, the imaginary line extending from the evaporation portion or the evaporation portion of the first heat pipe overlaps at least the portion other than the central portion in plan view.
  • the first heat pipe is arranged.
  • the heat sink of the present invention can be used in a wide range of fields, it can provide a superior maximum heat transport amount to a heat pipe that has a relatively large amount of heat input from a heating element. It is highly useful in the field of cooling electronic components mounted on computers and the like.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

L'invention concerne un dissipateur thermique qui est équipé d'une partie de réception de chaleur reliée thermiquement à un élément chauffant, d'une pluralité de caloducs chacun thermiquement connectés à la partie de réception de chaleur sur un site prescrit sur celui-ci, et d'une partie de dissipation de chaleur reliée thermiquement à un autre site sur la pluralité de caloducs différant du site prescrit susmentionné. Parmi la pluralité de caloducs, ledit autre site sur un premier caloduc, dans laquelle une ligne droite virtuelle s'étendant le long de la direction d'extension du site prescrit sur celui-ci à partir d'au moins une partie du site prescrit ou de l'extrémité du site prescrit chevauchant dans une vue en plan une partie à haute densité de chaleur de l'élément chauffant, est situé en outre plus sous le vent de l'air de refroidissement que ledit autre site sur un second caloduc, une ligne droite virtuelle s'étendant le long de la direction d'extension du site prescrit sur celui-ci à partir du site prescrit ou de l'extrémité du site prescrit ne chevauchant pas dans une vue en plan la partie à haute densité de chaleur de l'élément chauffant.
PCT/JP2019/008029 2018-03-01 2019-03-01 Dissipateur thermique WO2019168145A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-036147 2018-03-01
JP2018036147A JP2019152351A (ja) 2018-03-01 2018-03-01 ヒートシンク

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WO2019168145A1 true WO2019168145A1 (fr) 2019-09-06

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117352A (ja) * 1985-11-18 1987-05-28 Toshiba Corp 電力用半導体素子冷却器
JP2003336976A (ja) * 2002-05-17 2003-11-28 Furukawa Electric Co Ltd:The ヒートシンクおよびその実装構造
US20070234741A1 (en) * 2006-04-11 2007-10-11 Tsung-Chu Lee Heat radiator having a thermo-electric cooler and multiple heat radiation modules and the method of the same
JP2009150561A (ja) * 2007-12-18 2009-07-09 Furukawa Electric Co Ltd:The ヒートシンク
JP3168433U (ja) * 2011-04-01 2011-06-09 崇賢 ▲黄▼ 放熱器
JP2017059768A (ja) * 2015-09-18 2017-03-23 古河電気工業株式会社 ヒートシンク

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117352A (ja) * 1985-11-18 1987-05-28 Toshiba Corp 電力用半導体素子冷却器
JP2003336976A (ja) * 2002-05-17 2003-11-28 Furukawa Electric Co Ltd:The ヒートシンクおよびその実装構造
US20070234741A1 (en) * 2006-04-11 2007-10-11 Tsung-Chu Lee Heat radiator having a thermo-electric cooler and multiple heat radiation modules and the method of the same
JP2009150561A (ja) * 2007-12-18 2009-07-09 Furukawa Electric Co Ltd:The ヒートシンク
JP3168433U (ja) * 2011-04-01 2011-06-09 崇賢 ▲黄▼ 放熱器
JP2017059768A (ja) * 2015-09-18 2017-03-23 古河電気工業株式会社 ヒートシンク

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