WO2018003958A1 - Heat sink structure - Google Patents

Heat sink structure Download PDF

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Publication number
WO2018003958A1
WO2018003958A1 PCT/JP2017/024069 JP2017024069W WO2018003958A1 WO 2018003958 A1 WO2018003958 A1 WO 2018003958A1 JP 2017024069 W JP2017024069 W JP 2017024069W WO 2018003958 A1 WO2018003958 A1 WO 2018003958A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
heat pipe
heating element
planar
tubular
Prior art date
Application number
PCT/JP2017/024069
Other languages
French (fr)
Japanese (ja)
Inventor
義勝 稲垣
川畑　賢也
博史 青木
大輝 竹村
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
Priority claimed from JP2016131803A external-priority patent/JP6266044B2/en
Priority claimed from JP2016131802A external-priority patent/JP6574404B2/en
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
Priority to CN201790000986.XU priority Critical patent/CN209524789U/en
Publication of WO2018003958A1 publication Critical patent/WO2018003958A1/en
Priority to US16/237,283 priority patent/US20190137187A1/en

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Classifications

    • 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
    • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • 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
    • F28D15/0233—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 the conduits having a particular shape, e.g. non-circular cross-section, annular
    • 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
    • F28D15/04—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 with tubes having a capillary structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • 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
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367—Cooling facilitated by shape of device
    • H01L23/3672—Foil-like cooling fins or heat sinks
    • 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
    • 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
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • 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
    • H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
    • H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0029—Heat sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/08—Fluid driving means, e.g. pumps, fans

Definitions

  • the present invention relates to a heat sink structure excellent in cooling performance for a plurality of heating elements installed in a narrow internal space, for example, an internal space having a small dimension in the thickness direction.
  • the present invention also relates to a heat sink structure excellent in cooling performance for a heating element installed in a narrow internal space.
  • a planar heat pipe may be used as a cooling means for electronic components installed in a narrowed internal space.
  • Patent Document 1 since the flat heat pipe is bent by the pressing of the pressing member, that is, deformed in the vertical direction with respect to the flat surface, in the flat heat pipe with a thin container, the internal space In particular, the space in the thickness direction is blocked or narrowed, and there is a problem that the heat transport characteristic which is a function as a heat pipe is impaired.
  • Patent Document 1 when cooling a plurality of heating elements, flat heat pipes that are separate from each other are connected to the respective heating elements, and the flat heat pipes are respectively tubular. It needs to be connected to a second heat pipe, which is a main heat pipe, having a container. Therefore, the dimensions of the flat heat pipe must be adjusted according to the position of the heating element, and there is a problem that the number of parts increases and the structure becomes complicated.
  • the present invention reliably prevents the internal space of the planar heat pipe from being blocked or narrowed, and has an excellent heat transport characteristic, and a narrow internal space with a simple configuration. It is an object of the present invention to provide a heat sink structure that can uniformly cool a plurality of heating elements installed in a heat sink. In addition, the present invention exhibits excellent cooling performance by having an excellent heat transport property and a function as a heat equalizing plate for a heating element installed in a narrowed internal space with a simple configuration. An object is to provide a heat sink structure.
  • aspects of the present invention include a planar heat pipe that is mounted on a plurality of heating elements and thermally connected to the plurality of heating elements, and heat is generated by a heat radiating unit and a heat receiving unit of the planar heat pipe. And a heat sink structure having a tubular heat pipe connected thereto.
  • the planar heat pipe is mounted on the plurality of heating elements, so that it is thermally connected to the plurality of heating elements, and is fixed to the heating element.
  • part to which the heat generating body was thermally connected among planar heat pipes functions as a heat receiving part.
  • part to which the tubular heat pipe was thermally connected among planar heat pipes functions as a thermal radiation part.
  • a portion where the planar heat pipe is thermally connected functions as a heat receiving portion.
  • the plurality of heating elements are thermally connected to the planar heat pipe, the plurality of heating elements are thermally connected to one planar heat pipe, that is, the same planar heat pipe.
  • An aspect of the present invention is a heat sink structure in which a heat exchange means is provided in a heat radiating portion of the tubular heat pipe.
  • An aspect of the present invention is a heat sink structure in which the heat exchanging means has heat radiating fins.
  • An aspect of the present invention is a heat sink structure in which the heat exchange means and / or the heat radiating portion of the tubular heat pipe is cooled by cooling air from a blower fan.
  • An aspect of the present invention is a heat sink structure in which a biasing member is provided on the planar heat pipe, and the biasing member is fixed to a support member of the heating element.
  • An aspect of the present invention is a heat sink structure including a planar heat pipe and a tubular heat pipe thermally connected to the planar heat pipe, and the planar heat pipe and the tubular in a plan view.
  • This is a heat sink structure in which a heating element is thermally connected at a position where heat pipes overlap.
  • the heating element is connected to the flat heat pipe or the tubular heat pipe.
  • plan view means the aspect visually recognized from the perpendicular direction with respect to the plane part of a planar heat pipe.
  • An aspect of the present invention is a heat sink structure in which the tubular heat pipe is arranged in the direction of the heating element rather than the planar heat pipe.
  • the heating element is connected to the tubular heat pipe.
  • An aspect of the present invention is a heat sink structure in which the planar heat pipe is arranged in the direction of the heating element rather than the tubular heat pipe.
  • a heat generating body is connected to a planar heat pipe.
  • An aspect of the present invention is a heat sink structure in which a heat exchange means is provided in a heat radiating portion of the tubular heat pipe.
  • An aspect of the present invention is a heat sink structure in which the heat exchanging means has a heat radiation fin.
  • An aspect of the present invention is a heat sink structure in which the heat exchange means and / or the heat radiating portion of the tubular heat pipe is cooled by cooling air from a blower fan.
  • the planar heat pipe is placed on the plurality of heating elements and thermally connected to the plurality of heating elements, the internal space of the planar heat pipe is blocked. And narrowing can be reliably prevented, and as a result, excellent heat transport characteristics can be exhibited.
  • the plurality of heating elements are thermally connected to one planar heat pipe, the number of parts of the planar heat pipe can be reduced and the structure can be simplified.
  • a plurality of heating elements are thermally connected to one flat heat pipe, and the flat heat pipe heats a tubular heat pipe having excellent heat transport characteristics in a predetermined direction. Therefore, even if the heat generation amounts of the plurality of heat generating elements are different, the flat heat pipe can equalize the heat generating elements, and thus the cooling of the heat generating elements can be made uniform.
  • the heating element is thermally connected to the planar heat pipe, even in a narrow inner space, for example, a heating element installed in an inner space having a small dimension in the thickness direction, Can be cooled reliably.
  • the heat exchange means is provided in the heat radiating portion of the tubular heat pipe, so that the heat radiating characteristic of the tubular heat pipe is improved, and even a heating element installed in a narrow internal space is reliably cooled. it can.
  • the heat sink structure of the present invention can exhibit excellent cooling performance with respect to the heating element by having excellent heat transport characteristics and a function as a soaking plate.
  • the heating elements having a relatively small heating value are Since it can cool with the planar heat pipe which has a function, the heat transport amount of a tubular heat pipe can be reduced by that much.
  • the number of heating elements that use a planar heat pipe and are thermally connected is not particularly limited, heat generated in a narrowed internal space with a simple configuration. Excellent cooling performance for the body.
  • the tubular heat pipe is disposed in the direction of the heating element rather than the planar heat pipe, so that the heat of the heating element is smoothly transferred to the tubular heat pipe, and the The heat from the heating element transmitted to the flat heat pipe is diffused on the surface by the function of the flat plate heat pipe as a soaking plate, thereby increasing the heat radiation area. Therefore, in the said aspect, the amount of heat transport of a tubular heat pipe can be reduced, and by extension, a tubular heat pipe can be flattened (thinned) and thinned. Thus, since the tubular heat pipe can be flattened and thinned, the heat sink structure can be further downsized.
  • the planar heat pipe is arranged in the direction of the heating element rather than the tubular heat pipe, so that the heat of the heating element is first brought about by the function as the soaking plate of the planar heat pipe. Since it is transmitted to the tubular heat pipe after being diffused upward, it is possible to prevent hot spots from occurring in the planar heat pipe. Thus, since a hot spot can be prevented from occurring in the planar heat pipe, excellent cooling performance can be exhibited for the heating element.
  • the heat exchange means is provided in the heat radiating portion of the tubular heat pipe, so that the heat radiating characteristic of the tubular heat pipe is improved, and even a heating element installed in a narrow internal space is reliably cooled. it can.
  • the heat sink structure 1 according to the first embodiment includes a planar heat pipe 10 and a tubular heat pipe 12 thermally connected to the planar heat pipe 10. .
  • the planar container 11 of the planar heat pipe 10 and the tubular container 13 of the tubular heat pipe 12 are in direct contact with each other so that the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected. Yes.
  • a plurality of heating elements mounted on the substrate 102 are thermally connected to the planar heat pipe 10.
  • the first heating element 100 and the second heating element 101 are thermally connected to the same planar heat pipe 10.
  • the first heating element 100 and the second heating element 101 are thermally connected via the planar heat pipe 10.
  • a portion of the flat heat pipe 10 where the first heat generating body 100 and the second heat generating body 101 are thermally connected functions as a heat receiving portion of the flat heat pipe 10.
  • the planar heat pipe 10 is thermally connected to the first heating element 100 and the second heating element 101 by being placed on the first heating element 100 and the second heating element 101, and It has been fixed.
  • the flat heat pipe 10 may be placed so as to be in direct contact with the first heat generating body 100 and the second heat generating body 101. 10 may be inserted between the first heating element 100 and the second heating element 101.
  • the peripheral edge of the planar heat pipe 10 that is a predetermined distance away from the portion of the planar heat pipe 10 where the first heating element 100 and the second heating element 101 are thermally connected.
  • One end portion 14 of the tubular heat pipe 12 is thermally connected to the portion.
  • one tubular heat pipe 12 is thermally connected to the peripheral portion of the planar heat pipe 10.
  • a portion where one end 14 of the tubular heat pipe 12 is thermally connected functions as a heat radiating portion of the flat heat pipe 10.
  • the method of thermally connecting the planar heat pipe 10 and the tubular heat pipe 12 is not particularly limited.
  • the tubular container 13 of the tubular heat pipe 12 is soldered to the planar container 11 of the planar heat pipe 10.
  • the flat heat pipe 10 and the tubular heat pipe 12 can be thermally connected by fixing by attaching, caulking, or the like.
  • the one end portion 14 of the tubular heat pipe 12 thermally connected to the planar heat pipe 10 functions as a heat receiving portion of the tubular heat pipe 12.
  • portions of the tubular heat pipe 12 other than the one end portion 14, that is, the center portion 15 and the other end portion 16 are not in contact with the planar heat pipe 10.
  • the other end portion 16 of the tubular heat pipe 12 functions as a heat radiating portion of the tubular heat pipe 12.
  • the tubular heat pipe 12 may be bent as shown in FIGS. 1 and 2 or may be used in a linear shape.
  • the tubular heat pipe 12 may be partially or entirely flattened.
  • the entire tubular heat pipe 12 including the heat receiving portion is flattened.
  • one end portion 14 (heat receiving portion) of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10. That is, one end 14 of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10 in plan view.
  • the central portion 15 and the other end portion 16 of the tubular heat pipe 12 also extend along the planar direction of the planar heat pipe 10, similarly to the one end portion 14. Therefore, the heat transport direction of the tubular heat pipe 12 is substantially parallel to the planar direction of the planar heat pipe 10.
  • a heat radiating fin 17 is attached to the other end portion 16 of the tubular heat pipe 12 (that is, a heat radiating portion of the tubular heat pipe 12) as heat exchange means.
  • a blower fan 103 is disposed between the heat radiating fins 17 and the planar heat pipe 10. Cooling air from the blower fan 103 is supplied to the radiation fins 17.
  • heat is smoothly released from the heat radiating portion of the tubular heat pipe 12 to the external environment by attaching the plurality of heat radiating fins 17 to the other end portion 16 of the tubular heat pipe 12. Further, since the blower fan 103 is disposed between the heat radiation fins 17 and the planar heat pipe 10, the blower fan 103 is operated, so that not only cooling air is supplied to the heat radiation fins 17, but also a flat surface. An air flow is generated from the mold heat pipe 10 toward the radiation fins 17, and this air flow also functions as cooling air for cooling the planar heat pipe 10.
  • the flat heat pipe 10 includes a flat container 11, a working fluid (not shown) sealed in the internal space of the flat container 11, and a wick structure (not shown) provided in the internal space of the flat container 11.
  • the tubular heat pipe 12 includes a tubular container 13, a working fluid (not shown) sealed in the inner space of the tubular container 13, and a wick structure (not shown) provided in the inner space of the tubular container 13. And have.
  • Examples of the material of the flat container 11 and the tubular container 13 include copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, stainless steel, titanium, and the like. Further, the working fluid can be appropriately selected according to the compatibility with the material of the planar container 11 and the tubular container 13, and examples thereof include water, fluorocarbons such as chlorofluorocarbons and fluorinate, and cyclopentane. Can do.
  • Examples of the wick structure include a sintered body of metal powder such as copper powder, a metal mesh, a wire, a groove formed on the inner surface of the planar container 11 and the tubular container 13.
  • the heating element to be cooled is not particularly limited, but a central processing unit, graphic chip (GPU, VGA), memory, capacitor, power supply mounted on the substrate 102 (for example, a circuit board built in an electronic device). Etc.
  • the heat receiving part of the flat heat pipe 10 receives heat from the first heat generating element 100 and the second heat generating element 101
  • the heat receiving part of the flat heat pipe 10 is connected to one end 14 of the tubular heat pipe 12.
  • the heat from the first heating element 100 and the second heating element 101 is transported to the heat radiating part of the flat heat pipe 10.
  • a flat surface portion other than the heat receiving portion of the flat heat pipe 10 functions as a heat radiating portion of the flat heat pipe 10.
  • Part of the heat transported from the heat receiving portion of the planar heat pipe 10 to the heat radiating portion is from the heat radiating portion of the flat heat pipe 10 to one end 14 of the tubular heat pipe 12, that is, the heat receiving portion of the tubular heat pipe 12. Is transmitted to.
  • the heat transferred to the heat receiving portion of the tubular heat pipe 12 is transported to the other end portion 16 of the tubular heat pipe 12, that is, the heat radiating portion of the tubular heat pipe 12. To the outside environment.
  • the heat of the first heating element 100 and the second heating element 101 received by the flat heat pipe 10 is transported to the site of the radiation fin 17 by the tubular heat pipe 12, so that it can be smoothly transferred to the external environment. Can be released.
  • the heat sink structure 1 is thermally connected to the first heating element 100 and the second heating element 101 while being placed on the first heating element 100 and the second heating element 101, it is flat. It is possible to reliably prevent the internal space of the mold heat pipe from being blocked and narrowed, and thus exhibit excellent heat transport characteristics, and to reliably cool a plurality of heating elements.
  • a plurality of heating elements (the first heating element 100 and the second heating element 101) are thermally connected to one planar heat pipe 10. The number of points can be reduced and the heat sink structure 1 can be simplified. Further, in the heat sink structure 1, a plurality of heating elements are thermally connected to one flat heat pipe 10, and the flat heat pipe 10 is heated to the tubular heat pipe 12 that transports heat to the installation site of the radiation fins 17. Therefore, even if the heat generation amounts of the plurality of heat generating elements are different, the flat heat pipe 10 can equalize the heat generating elements, and thus can uniformly cool the heat generating elements.
  • each heating element is thermally connected to the planar heat pipe, even in the case of a heating element installed in a narrow internal space, for example, an internal space having a small dimension in the thickness direction, it is ensured. Can be cooled.
  • one tubular heat pipe 12 is thermally connected to the peripheral portion of the planar heat pipe 10, but instead of this, the second embodiment is used.
  • the heat sink structure 2 as shown in FIG. 3, two tubular heat pipes 12 and 12 ′ are thermally connected to the peripheral portion of the planar heat pipe 10.
  • the tubular heat pipe 12 is not only thermally connected to a predetermined portion of the peripheral portion of the planar heat pipe 10, but also the planar heat pipe 10 facing the tubular heat pipe 12.
  • Another tubular heat pipe 12 ' is thermally connected to the position of the peripheral edge. Note that, similarly to the heat radiating portion of the tubular heat pipe 12, heat radiating fins 17 are also provided in the heat radiating portions of the other tubular heat pipes 12 '.
  • the number of the tubular heat pipes 12 that are thermally connected to the planar heat pipe 10 is not particularly limited, and may be one or more, depending on use conditions such as the amount of heat generated by the heating element and the number of heating elements. Can be appropriately selected.
  • the planar heat pipe 10 is thermally contacted directly with each heating element (the first heating element 100 and the second heating element 101) or through heat conductive grease.
  • a heat conductive member 18 is inserted between the planar heat pipe 10 and the heating element. ing.
  • the third heating element 104 that is, three heating elements are mounted on the substrate 102 in addition to the first heating element 100 and the second heating element 101.
  • the above aspect is particularly effective when the first heating element 100, the second heating element 101, and the third heating element 104 have mutually different height dimensions. That is, the heat conductive member 18 is inserted between the heating element (the second heating element 101 and the third heating element 104 in FIG. 4) and the flat heat pipe 10 having a small dimension in the height direction, The heating element has the same height as that of the heating element having the largest dimension in the height direction (first heating element 100 in FIG. 4). As a result, a plurality of heating elements (first heating element 100, second heating element 101, and third heating element 104) and the planar heat pipe 10 can be obtained without deforming the planar heat pipe 10 such as bending. Can be connected thermally.
  • Examples of the heat conductive member 18 include a heat conductive sheet.
  • thermal conductive grease 19 is applied to the contact surface between the first heating element 100 and the flat heat pipe 10 in order to improve thermal conductivity.
  • a biasing member 20 is further provided on the surface (back surface) of the flat heat pipe 10 on the heating element side.
  • the biasing member 20 is provided on the back surface of the planar heat pipe 10
  • the planar heat pipe 10 is prevented from being deformed such as bending, and the planar heat pipe 10 is connected to the first heating element 100 and the second heating element 100.
  • the heating element 101 can be biased. Therefore, the thermal connectivity between the planar heat pipe 10 and the first and second heating elements 100 and 101 is improved, and the planar heat pipe 10 can be securely fixed to the substrate 102.
  • the tubular heat pipe 12 is attached to a surface (surface) that is not the heating element side of the flat heat pipe 10.
  • two urging members 20 are provided on the back surface of the planar heat pipe 10.
  • the respective urging members 20 are arranged at the peripheral edge of the planar heat pipe 10 so as to face each other.
  • each heating element (the first heating element 100 and the second heating element 101) is disposed between the two biasing members 20. Accordingly, the planar heat pipe 10 in a state of being urged toward the substrate 102 is thermally connected to all the heating elements.
  • the biasing member 20 is fixed to the substrate 102 on which the first heating element 100 and the second heating element 101 are mounted.
  • the urging member 20 includes a first flat portion 20-1 attached in a surface contact with the back surface of the planar heat pipe 10, and a second flat portion 20-2 attached in a surface contact with the substrate 102. And a connecting portion 20-3 that connects the first flat portion 20-1 and the second flat portion 20-2.
  • the connecting portion 20-3 exhibits a biasing action.
  • the means for attaching the first flat portion 20-1 to the back surface of the planar heat pipe 10 is not particularly limited, and examples thereof include soldering.
  • the means for fixing the second flat portion 20-2 to the substrate 102 is not particularly limited, and in the heat sink structure 4, the second flat portion 20-2 is fixed to the substrate 102 with screws 21. That is, the second flat portion 20-2 is provided with a through hole (not shown) through which the screw 21 is inserted, the substrate 102 is provided with a screw hole (not shown), and the screw 21 is used as a through hole.
  • the biasing member 20 is fixed to the substrate 102 by being inserted and screwed into the screw hole.
  • Examples of the urging member 20 include spring members such as metal leaf springs and coils.
  • the planar heat pipe 10 in a state of being urged toward the substrate 102 is thermally connected to all the heating elements.
  • a plurality of heating elements in FIG. 6, the first heating element 100 and the second heating element 101 are formed. Of the two heating elements), only a part of the heating elements (in FIG. 6, the first heating element 100), the planar heat pipe 10 that is biased toward the substrate 102 is thermally It is connected.
  • the planar heat pipe 10 is provided with a through hole 22 through which the screw 21 is inserted, and the biasing member 20 is also provided with a through hole (not shown) through which the screw 21 is inserted.
  • the substrate 102 is provided with a screw hole (not shown).
  • the planar heat pipe 10 and the urging member 20 are inserted into the through hole 22 of the planar heat pipe 10 and the through hole of the urging member 20 and screwed into the threaded holes of the substrate 102, respectively. It is fixed to the substrate 102.
  • the first heating element 100 is disposed between the two biasing members 20, but the second heating element 101 is not disposed. .
  • a portion of the flat heat pipe 10 that is not biased toward the substrate 102 is thermally connected to the second heating element 101.
  • a thermal conductive member 18 such as a thermal conductive sheet is inserted between the second heat generating body 101 and the planar heat pipe 10, and the planar heat pipe is provided by a buffering function of the thermal conductive member 18. 10 is also biased toward the first heating element 100.
  • the thermal connectivity between the planar heat pipe 10 and the first heating element 100 is improved while preventing deformation such as bending of the planar heat pipe 10, and the planar heat pipe 10 is reliably secured. It can be fixed to the substrate 102.
  • the heat radiating fins are provided as the heat exchanging means in the heat radiating portion of the tubular heat pipe.
  • the heat exchanging means may not be provided depending on the use situation.
  • the blower fan is installed in the vicinity of the heat radiating fins. However, the blower fan may not be installed depending on the use situation.
  • the planar heat pipe is placed in direct contact with each heating element or via thermal conductive grease.
  • the heating element and the planar heat pipe are You may arrange
  • the heat sink structure of the present invention described above has excellent heat transport characteristics, and with a simple configuration, can uniformly cool a plurality of heating elements installed in a narrowed internal space.
  • the utility value is high in the field of cooling a plurality of heating elements installed in a space with small dimensions.
  • the heat sink structure 6 includes a planar heat pipe 10 and a tubular heat pipe 12 thermally connected to the planar heat pipe 10. .
  • the planar container 11 of the planar heat pipe 10 and the tubular container 13 of the tubular heat pipe 12 are in direct contact, so that the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected. Yes.
  • the tubular heat pipe 12 is arranged in the direction of the heating element rather than the planar heat pipe 10.
  • the tubular heat pipe 12 is thermally connected to the first heating element 100 mounted on the substrate 102
  • the planar heat pipe 10 is thermally connected to the second heating element 101 mounted on the substrate 102. It is connected. Accordingly, the first heating element 100 is thermally connected to the planar heat pipe 10 via the tubular heat pipe 12, and the second heating element 101 is connected to the tubular heat pipe 12 via the planar heat pipe 10. Thermally connected.
  • the planar heat pipe 10 has a function as a soaking plate.
  • the tubular heat pipe 12 is in direct contact with the first heating element 100 to be thermally connected to the first heating element 100, and the planar heat pipe 10 is connected to the second heating element 101.
  • the heat generating grease (not shown) may be thermally connected to the second heating element 101 by direct contact, and the tubular heat pipe 12 and the first heating element 100, the planar heat pipe 10 and the second heating pipe 101 are connected to each other. It may be inserted between the heating element 101 and thermally connected.
  • one end 14 of the tubular heat pipe 12 is thermally connected to the planar heat pipe 10, and the first heating element 100 is connected to the one end 14 of the tubular heat pipe 12. Thermally connected. That is, as shown in FIG. 8, the first heating element 100 is thermally connected at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap in a plan view.
  • the second heating element 101 is thermally connected to the planar heat pipe 10 at a position that does not overlap the tubular heat pipe 12 in plan view.
  • one tubular heat pipe 12 is thermally connected to the planar heat pipe 10.
  • the method of thermally connecting the planar heat pipe 10 and the tubular heat pipe 12 is not particularly limited.
  • the tubular container 13 of the tubular heat pipe 12 is soldered to the planar container 11 of the planar heat pipe 10.
  • the flat heat pipe 10 and the tubular heat pipe 12 can be thermally connected by fixing by attaching, caulking, or the like.
  • portions of the tubular heat pipe 12 other than the one end portion 14, that is, the center portion 15 and the other end portion 16 are not in contact with the planar heat pipe 10.
  • the other end portion 16 of the tubular heat pipe 12 functions as a heat radiating portion of the tubular heat pipe 12.
  • the tubular heat pipe 12 may be bent as shown in FIGS. 7 and 8 or may be used in a linear shape.
  • the tubular heat pipe 12 may be partially or entirely flattened.
  • the entire tubular heat pipe 12 including the heat receiving portion is flattened.
  • one end portion 14 (heat receiving portion) of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10. That is, one end 14 of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10 in plan view.
  • the central portion 15 and the other end portion 16 of the tubular heat pipe 12 also extend along the planar direction of the planar heat pipe 10, similarly to the one end portion 14. Therefore, the heat transport direction of the tubular heat pipe 12 is substantially parallel to the planar direction of the planar heat pipe 10.
  • heat radiating fins 17 are attached to the other end portion 16 of the tubular heat pipe 12 (that is, the heat radiating portion of the tubular heat pipe 12) as heat exchange means.
  • a blower fan 103 is disposed between the heat radiating fins 17 and the planar heat pipe 10. Cooling air from the blower fan 103 is supplied to the radiation fins 17.
  • the plurality of radiating fins 17 are attached to the other end 16 of the tubular heat pipe 12, so that heat is smoothly released from the radiating portion of the tubular heat pipe 12 to the external environment.
  • the installation position of the blower fan 103 is not particularly limited, but when the blower fan 103 is disposed between the heat radiation fin 17 and the planar heat pipe 10, the blower fan 103 is operated to cool the heat radiation fin 17. Not only the wind is supplied, but also an air flow is generated from the planar heat pipe 10 toward the radiating fins 17, and this air flow also functions as cooling air for cooling the planar heat pipe 10.
  • the flat heat pipe 10 includes a flat container 11, a working fluid (not shown) sealed in the internal space of the flat container 11, and a wick structure (not shown) provided in the internal space of the flat container 11.
  • the tubular heat pipe 12 includes a tubular container 13, a working fluid (not shown) sealed in the inner space of the tubular container 13, and a wick structure (not shown) provided in the inner space of the tubular container 13. And have.
  • Examples of the material of the flat container 11 and the tubular container 13 include copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, stainless steel, titanium, and the like. Further, the working fluid can be appropriately selected according to the compatibility with the material of the planar container 11 and the tubular container 13, and examples thereof include water, fluorocarbons such as chlorofluorocarbons and fluorinate, and cyclopentane. Can do.
  • Examples of the wick structure include a sintered body of metal powder such as copper powder, a metal mesh, a wire, a groove formed on the inner surface of the planar container 11 and the tubular container 13.
  • the heating element to be cooled is not particularly limited, but a central processing unit, graphic chip (GPU, VGA), memory, capacitor, power supply mounted on the substrate 102 (for example, a circuit board built in an electronic device). Etc.
  • the cooling mechanism of the heat sink structure 6 will be described.
  • one end portion 14 (heat receiving portion) of the tubular heat pipe 12 receives heat from the first heating element 100
  • the heat transferred from the first heating element 100 to the heat receiving portion of the tubular heat pipe 12 is the tubular heat pipe. 12 is transported to the heat radiating portion of the tubular heat pipe 12, and is discharged from the heat radiating portion of the tubular heat pipe 12 to the external environment via the heat radiating fins 17.
  • the heat transferred from the second heating element 101 to the flat heat pipe 10 is diffused along the plane of the flat heat pipe 10, and a part thereof. Is transported to one end 14 of the tubular heat pipe 12 and discharged from the heat radiating portion of the tubular heat pipe 12 to the external environment via the heat radiating fins 17. Accordingly, the planar heat pipe 10 has a function as a soaking plate.
  • the heat of the first heating element 100 and the second heating element 101 received by the heat sink structure 6 is smoothly released to the external environment by being transported to the site of the radiation fin 17 by the tubular heat pipe 12, It diffuses along the plane of the planar heat pipe 10 and is also released from the planar heat pipe 10.
  • the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected, so that the heat from the first heating element 100 and the second heat pipe 10 are heated by the planar heat pipe 10.
  • the tubular heat pipe 12 exhibits a heat transport function.
  • at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap each other at least a part of the plurality of heating elements (first heating element 100 and second heating element 101) (first heating element). Since the body 100) is thermally connected, heat is smoothly transferred from the first heating element 100 to the tubular heat pipe 12. Therefore, the heat sink structure 6 can exhibit excellent cooling performance with respect to the heating element by having an excellent heat transport characteristic and a function as a soaking plate.
  • the heat sink structure 6 when a plurality of heating elements (the first heating element 100 and the second heating element 101) are cooled and the amount of heat generated by each heating element is different, heat generation is relatively performed.
  • a small amount of the heating element (for example, the second heating element 101) can be cooled by the flat heat pipe 10 having a function as a soaking plate, so that the heat transport amount of the tubular heat pipe 12 can be reduced accordingly. .
  • the flat heat pipe 10 is used, and the number of heat generating elements to be thermally connected is not particularly limited, so that heat generated in a narrowed internal space with a simple configuration. Excellent cooling performance for the body.
  • the tubular heat pipe 12 is arranged in the direction of the heating element (the first heating element 100 and the second heating element 101) (the direction of the substrate 102) rather than the planar heat pipe 10, thereby generating heat.
  • the heat of the body (the first heating element 100 in FIGS. 7 and 8) is smoothly transferred to the tubular heat pipe 12.
  • the heat transmitted from each heating element (the first heating element 100 and the second heating element 101) is transmitted on the surface of the planar heat pipe 10 by the function as a soaking plate of the planar heat pipe 10.
  • the heat dissipation area increases. Therefore, the amount of heat transport of the tubular heat pipe 12 can be reduced, and as a result, the tubular heat pipe 12 can be flattened and thinned.
  • the heat sink structure 6 can be further downsized.
  • the tubular heat pipe 12 is connected to the first heating element 100 mounted on the substrate 102, and the planar heat pipe 10 is mounted on the substrate 102.
  • the flat heat pipe 10 instead of this, as shown in FIGS. 9A and 9B, the flat heat pipe 10 includes The heating element is not connected.
  • the first heating element 100 is thermally connected at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap in a plan view.
  • the heating element is not connected to a position where the tubular heat pipe 12 and the planar heat pipe 10 do not overlap in plan view.
  • the heat from the first heating element 100 is caused by the planar heat pipe 10 to be generated in the planar heat pipe 10.
  • the tubular heat pipe 12 exhibits a heat transport function in a state where the heat radiating area increases while diffusing along the plane.
  • the heating element first heating element 100
  • the heat sink structure 7 can exhibit excellent cooling performance with respect to the heating element by having excellent heat transport characteristics and a function as a soaking plate.
  • the tubular heat pipe 12 is arranged in the direction of the heating element rather than the planar heat pipe 10, but instead, the heat sink structure according to the eighth embodiment.
  • the planar heat pipe 10 is arranged in the direction of the heating element rather than the tubular heat pipe 12.
  • the planar heat pipe 10 is connected to a heating element mounted on the substrate 102 (in FIG. 10, a plurality of heating elements, that is, the first heating element 100 and the second heating element 101).
  • a heating element is not connected to the tubular heat pipe 12. Accordingly, both of the heating elements, that is, the first heating element 100 and the second heating element 101 are thermally connected to the tubular heat pipe 12 via the planar heat pipe 10. Accordingly, the planar heat pipe 10 has a function as a soaking plate.
  • FIG. 10 (b) some of the plurality of heating elements (in FIG. 10 (b), the first heat pipe 10 and the tubular heat pipe 12 overlap each other in plan view).
  • the heating element 100) is thermally connected to the planar heat pipe 10.
  • the other part of the heating elements in FIG. 10B, the second heating element 101 is heated with the planar heat pipe 10 at a position that does not overlap with the tubular heat pipe 12 in plan view. Connected.
  • the 1st heat generating body 100 touches the flat type heat pipe 10 directly, or contacts through thermal conductive grease (not shown), and is plane.
  • the mold heat pipe 10 is thermally connected.
  • a heat conductive member 18 such as a heat conductive sheet is inserted between the planar heat pipe 10 and the second heat generating element 101, and the second heat generating element 101 is a heat conductive member 18. It is thermally connected to the planar heat pipe 10 via
  • the heating elements having different dimensions in the height direction are thermally connected to the heat sink structure 8, the heating elements having a small dimension in the height direction (in FIG. 10A, the second heating element 101). ) And the planar heat pipe 10, it is possible to adjust the height between the heating elements having different dimensions in the height direction while preventing an increase in thermal resistance. Therefore, deformation such as bending of the planar heat pipe 10 can be prevented, so that the internal space of the planar heat pipe 10 can be maintained, and as a result, a decrease in cooling performance of the heat sink structure 8 can be prevented.
  • both the heat from the first heating element 100 and the heat from the second heating element 101 are planar heat. It is discharged from the planar heat pipe 10 while diffusing on the planar heat pipe 10 along the plane of the pipe 10.
  • the tubular heat pipe 12 is provided at a position overlapping the first heating element 100 in plan view, and one end portion 14 (heat receiving portion) of the tubular heat pipe 12 is in direct contact with the planar heat pipe 10. . Therefore, the heat that has not been released from the planar heat pipe 10 is transmitted to the heat receiving portion of the tubular heat pipe 12.
  • the heat transferred to the heat receiving portion of the tubular heat pipe 12 is transported from the heat receiving portion of the tubular heat pipe 12 to the other end 16 (heat radiating portion) of the tubular heat pipe 12 and from the heat radiating fins 17 provided in the heat radiating portion. Released to the outside environment. Therefore, the tubular heat pipe 12 has a function of transporting heat that has not been released from the planar heat pipe 10 to the portion of the radiation fin.
  • the heat of the heating element is changed to that of the planar heat pipe 10. Due to the function as a heat equalizing plate, the heat is first diffused along the plane of the flat heat pipe 10 and then transmitted to the tubular heat pipe 12. Accordingly, hot spots can be prevented from occurring in the planar heat pipe 10.
  • the heat sink structure 8 can prevent a hot spot from being generated in the planar heat pipe 10, it can exhibit excellent cooling performance for the heating element.
  • the planar heat pipe 10 can cover the entirety of the heating elements (the first heating element 100 and the second heating element 101) connected to the planar heat pipe 10 in plan view. The heat transfer from the body to the heat sink structure 8 is improved.
  • the number of tubular heat pipes is one.
  • the number is not particularly limited, and a plurality of tubular heat pipes may be installed according to the use state of the heat sink structure.
  • one tubular heat pipe 12 is thermally connected to the first heating element 100 mounted on the substrate 102, but instead, As shown in FIG. 11, in the heat sink structure 9 according to the ninth embodiment, a plurality of (two in FIG. 11) tubular heat pipes 12, 12 ′ are provided on the first heating element 100 mounted on the substrate 102. May be thermally connected.
  • two tubular heat pipes 12 and 12 ′ are thermally connected to a position overlapping the first heating element 100 in a plan view.
  • the portions that overlap the first heating element 100 in plan view are arranged in parallel and overlap with the planar heat pipe 10 in plan view.
  • one tubular heat pipe 12 and the other tubular heat pipe 12 ′ are arranged so as to be substantially symmetrical with respect to the center line of the planar heat pipe 10.
  • the plurality of tubular heat pipes 12 and 12 ′ are thermally connected to the first heating element 100, so that the first heating element 100 can be securely connected even when the first heating element 100 generates a large amount of heat. Can be cooled.
  • the number of heating elements that are thermally connected to the position where the planar heat pipe and the tubular heat pipe overlap in plan view is not particularly limited.
  • the position is Although one heating element is thermally connected, a plurality of heating elements may be thermally connected.
  • the heat radiating fins are provided as the heat exchanging means in the heat radiating portion of the tubular heat pipe.
  • the heat exchanging means may not be provided depending on the use situation.
  • the blower fan is installed in the vicinity of the heat radiating fins.
  • the blower fan may not be installed depending on the use situation.
  • the above-described heat sink structure of the present invention has an excellent cooling performance by having an excellent heat transport characteristic and a function as a heat equalizing plate for a heating element installed in a narrowed internal space with a simple configuration. Therefore, for example, in the field of cooling a heating element mounted on a substrate, the utility value is high.

Abstract

A heat sink structure is provided which, while achieving excellent heat transport characteristics by reliably preventing blockage and narrowing of the internal space of a flat heat pipe, can, with a simple structure, enable uniform cooling of multiple heat-generating bodies arranged in the narrowed internal space. This heat sink structure is provided with: a flat heat pipe which is thermally connected to multiple heat emitting bodies by being arranged on said heat emitting bodies; and a tubular heat pipe which is thermally connected at a heat receiving part to a heat dissipating part of said flat heat pipe.

Description

ヒートシンク構造Heat sink structure
　本発明は、狭小な内部空間、例えば、厚さ方向の寸法が小さい内部空間に設置された複数の発熱体に対する冷却性能に優れたヒートシンク構造に関するものである。また、本発明は、狭小な内部空間に設置された発熱体に対する冷却性能に優れたヒートシンク構造に関するものである。 The present invention relates to a heat sink structure excellent in cooling performance for a plurality of heating elements installed in a narrow internal space, for example, an internal space having a small dimension in the thickness direction. The present invention also relates to a heat sink structure excellent in cooling performance for a heating element installed in a narrow internal space.
　電気・電子機器に搭載されている半導体素子等の電子部品は、高機能化に伴う高密度搭載等により、発熱量が増大し、近年、その冷却がより重要となっている。また、電気・電子機器の小型化、薄型化等により、電気・電子機器の筐体の内部空間が、ますます、狭小化している。狭小化した内部空間に設置された電子部品の冷却手段として、平面型ヒートパイプが使用されることがある。 Electronic parts such as semiconductor elements mounted on electric / electronic devices have increased heat generation due to high-density mounting associated with higher functionality, and in recent years, cooling has become more important. In addition, due to the downsizing and thinning of electrical and electronic equipment, the internal space of the housing of electrical and electronic equipment is becoming increasingly narrow. A planar heat pipe may be used as a cooling means for electronic components installed in a narrowed internal space.
　厚さ方向の寸法が小さい内部空間に設置された電子部品の冷却構造として、筐体内に設けられた第１の発熱体と、筐体内に設けられたヒートシンクと、第１の押圧部材と、第１の発熱体に対向した第１の部分と第１の発熱体から外れた第２の部分とを有し、第１の押圧部材の押圧で撓む平板状の第１のヒートパイプと、第１のヒートパイプの第２の部分と、ヒートシンクとに接続された管状のコンテナを有する第２のヒートパイプを備えた冷却構造が提案されている（特許文献１）。 As a cooling structure for an electronic component installed in an internal space having a small dimension in the thickness direction, a first heating element provided in the housing, a heat sink provided in the housing, a first pressing member, A flat plate-like first heat pipe having a first portion facing the first heating element and a second portion deviating from the first heating element and being bent by the pressing of the first pressing member; A cooling structure having a second heat pipe having a tubular container connected to a second portion of one heat pipe and a heat sink has been proposed (Patent Document 1).
　また、特許文献１では、筐体内に第２の発熱体が設けられている場合、平板状の第１のヒートパイプに加えて、さらに、第２の発熱体に対向した第１の部分と、第２の発熱体から外れて第２のヒートパイプに接続された第２の部分とを有した平板状の第３のヒートパイプを備えるものである。 Moreover, in patent document 1, when the 2nd heat generating body is provided in the housing | casing, in addition to the flat plate-shaped 1st heat pipe, Furthermore, the 1st part facing the 2nd heat generating body, A flat plate-shaped third heat pipe having a second portion connected to the second heat pipe and deviating from the second heating element is provided.
　しかし、特許文献１では、押圧部材の押圧で平板状のヒートパイプを撓ませる、つまり、平面に対して鉛直方向に変形させるので、コンテナの厚さの薄い平板状のヒートパイプでは、その内部空間、特に、厚さ方向の空間が閉塞または狭小化して、ヒートパイプとしての機能である熱輸送特性が損なわれるという問題があった。 However, in Patent Document 1, since the flat heat pipe is bent by the pressing of the pressing member, that is, deformed in the vertical direction with respect to the flat surface, in the flat heat pipe with a thin container, the internal space In particular, the space in the thickness direction is blocked or narrowed, and there is a problem that the heat transport characteristic which is a function as a heat pipe is impaired.
　また、特許文献１では、複数の発熱体を冷却する場合に、それぞれの発熱体に、相互に別体である平板状のヒートパイプが接続され、該平板状のヒートパイプを、それぞれ、管状のコンテナを有する、メインのヒートパイプである第２のヒートパイプに接続される必要がある。よって、発熱体の位置に応じて、平板状のヒートパイプの寸法を調整しなければならず、部品点数が増大すると共に、構造が複雑化するという問題があった。 Further, in Patent Document 1, when cooling a plurality of heating elements, flat heat pipes that are separate from each other are connected to the respective heating elements, and the flat heat pipes are respectively tubular. It needs to be connected to a second heat pipe, which is a main heat pipe, having a container. Therefore, the dimensions of the flat heat pipe must be adjusted according to the position of the heating element, and there is a problem that the number of parts increases and the structure becomes complicated.
　また、特許文献１では、それぞれの発熱体に、相互に別体である平板状のヒートパイプが接続されているので、複数の発熱体の発熱量が異なると、特に、大きな発熱量を有する発熱体が十分に冷却されない場合がある、という問題があった。 Moreover, in patent document 1, since the flat heat pipe which is a mutually separate body is connected to each heat generating body, if the heat generating amount of several heat generating bodies differs, especially heat_generation | fever which has a big heat generating amount. There was a problem that the body might not be cooled sufficiently.
特開２０１１－１０６７９３号公報JP 2011-106793 A
　上記事情に鑑み、本発明は、平面型ヒートパイプの内部空間の閉塞や狭小化を確実に防止することで、優れた熱輸送特性を有しつつ、簡易な構成にて、狭小化した内部空間に設置された複数の発熱体の冷却を均一化できるヒートシンク構造を提供することを目的とする。また、本発明は、簡易な構成にて、狭小化した内部空間に設置された発熱体に対し、優れた熱輸送特性や均熱板としての機能を有することで、優れた冷却性能を発揮するヒートシンク構造を提供することを目的とする。 In view of the above circumstances, the present invention reliably prevents the internal space of the planar heat pipe from being blocked or narrowed, and has an excellent heat transport characteristic, and a narrow internal space with a simple configuration. It is an object of the present invention to provide a heat sink structure that can uniformly cool a plurality of heating elements installed in a heat sink. In addition, the present invention exhibits excellent cooling performance by having an excellent heat transport property and a function as a heat equalizing plate for a heating element installed in a narrowed internal space with a simple configuration. An object is to provide a heat sink structure.
　本発明の態様は、複数の発熱体上に載置されることで該複数の発熱体と熱的に接続される平面型ヒートパイプと、該平面型ヒートパイプの放熱部と受熱部にて熱的に接続された管状ヒートパイプと、を備えたヒートシンク構造である。 Aspects of the present invention include a planar heat pipe that is mounted on a plurality of heating elements and thermally connected to the plurality of heating elements, and heat is generated by a heat radiating unit and a heat receiving unit of the planar heat pipe. And a heat sink structure having a tubular heat pipe connected thereto.
　上記態様では、平面型ヒートパイプは、複数の発熱体上に載置されることで、該複数の発熱体と熱的に接続され、また、発熱体に固定されている。上記態様では、平面型ヒートパイプのうち、発熱体が熱的に接続された部位が、受熱部として機能する。また、平面型ヒートパイプのうち、管状ヒートパイプが熱的に接続された部位は、放熱部として機能する。管状ヒートパイプのうち、平面型ヒートパイプが熱的に接続された部位は、受熱部として機能する。また、上記態様では、平面型ヒートパイプに複数の発熱体が熱的に接続されるので、複数の発熱体は、１つの平面型ヒートパイプ、すなわち、同じ平面型ヒートパイプに熱的に接続される。 In the above aspect, the planar heat pipe is mounted on the plurality of heating elements, so that it is thermally connected to the plurality of heating elements, and is fixed to the heating element. In the said aspect, the site | part to which the heat generating body was thermally connected among planar heat pipes functions as a heat receiving part. Moreover, the site | part to which the tubular heat pipe was thermally connected among planar heat pipes functions as a thermal radiation part. Of the tubular heat pipe, a portion where the planar heat pipe is thermally connected functions as a heat receiving portion. In the above aspect, since the plurality of heating elements are thermally connected to the planar heat pipe, the plurality of heating elements are thermally connected to one planar heat pipe, that is, the same planar heat pipe. The
　本発明の態様は、前記管状ヒートパイプの放熱部に、熱交換手段が設けられているヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which a heat exchange means is provided in a heat radiating portion of the tubular heat pipe.
　本発明の態様は、前記熱交換手段が、放熱フィンを有するヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which the heat exchanging means has heat radiating fins.
　本発明の態様は、前記熱交換手段及び／または管状ヒートパイプの放熱部が、送風ファンの冷却風により冷却されるヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which the heat exchange means and / or the heat radiating portion of the tubular heat pipe is cooled by cooling air from a blower fan.
　本発明の態様は、前記平面型ヒートパイプに付勢部材が設けられ、該付勢部材が、前記発熱体の支持部材に固定されるヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which a biasing member is provided on the planar heat pipe, and the biasing member is fixed to a support member of the heating element.
　本発明の態様は、平面型ヒートパイプと、該平面型ヒートパイプと熱的に接続された管状ヒートパイプと、を備えたヒートシンク構造であって、平面視において、前記平面型ヒートパイプと前記管状ヒートパイプが重なり合う位置に、発熱体が熱的に接続されるヒートシンク構造である。 An aspect of the present invention is a heat sink structure including a planar heat pipe and a tubular heat pipe thermally connected to the planar heat pipe, and the planar heat pipe and the tubular in a plan view. This is a heat sink structure in which a heating element is thermally connected at a position where heat pipes overlap.
　上記態様では、平面型ヒートパイプまたは管状ヒートパイプに、発熱体が接続される。なお、本明細書中、「平面視」とは、平面型ヒートパイプの平面部に対して鉛直方向から視認した態様を意味する。 In the above aspect, the heating element is connected to the flat heat pipe or the tubular heat pipe. In addition, in this specification, "plan view" means the aspect visually recognized from the perpendicular direction with respect to the plane part of a planar heat pipe.
　本発明の態様は、前記管状ヒートパイプが、前記平面型ヒートパイプよりも前記発熱体の方向に配置されるヒートシンク構造である。上記態様では、管状ヒートパイプに、発熱体が接続される。 An aspect of the present invention is a heat sink structure in which the tubular heat pipe is arranged in the direction of the heating element rather than the planar heat pipe. In the above aspect, the heating element is connected to the tubular heat pipe.
　本発明の態様は、前記平面型ヒートパイプが、前記管状ヒートパイプよりも前記発熱体の方向に配置されるヒートシンク構造である。上記態様では、平面型ヒートパイプに、発熱体が接続される。 An aspect of the present invention is a heat sink structure in which the planar heat pipe is arranged in the direction of the heating element rather than the tubular heat pipe. In the said aspect, a heat generating body is connected to a planar heat pipe.
　本発明の態様は、前記管状ヒートパイプの放熱部に、熱交換手段が設けられているヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which a heat exchange means is provided in a heat radiating portion of the tubular heat pipe.
　本発明の態様は、前記熱交換手段が、放熱フィンを有するヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which the heat exchanging means has a heat radiation fin.
　本発明の態様は、前記熱交換手段及び／または管状ヒートパイプの放熱部が、送風ファンの冷却風により冷却されるヒートシンク構造である。 An aspect of the present invention is a heat sink structure in which the heat exchange means and / or the heat radiating portion of the tubular heat pipe is cooled by cooling air from a blower fan.
　本発明の態様によれば、平面型ヒートパイプは、複数の発熱体上に載置されることで、該複数の発熱体と熱的に接続されるので、平面型ヒートパイプの内部空間の閉塞や狭小化を確実に防止でき、結果、優れた熱輸送特性を発揮することができる。 According to the aspect of the present invention, since the planar heat pipe is placed on the plurality of heating elements and thermally connected to the plurality of heating elements, the internal space of the planar heat pipe is blocked. And narrowing can be reliably prevented, and as a result, excellent heat transport characteristics can be exhibited.
　また、本発明の態様によれば、複数の発熱体が１つの平面型ヒートパイプに熱的に接続されるので、平面型ヒートパイプの部品点数を低減できると共に、構造を簡素化できる。また、本発明の態様によれば、複数の発熱体が１つの平面型ヒートパイプに熱的に接続され、該平面型ヒートパイプが、所定方向に優れた熱輸送特性を有する管状ヒートパイプに熱的に接続されているので、複数の発熱体の発熱量が異なっても、平面型ヒートパイプが各発熱体を均熱化でき、ひいては、各発熱体の冷却を均一化できる。さらに、本発明の態様によれば、発熱体は平面型ヒートパイプに熱的に接続されるので、狭小な内部空間、例えば、厚さ方向の寸法が小さい内部空間に設置された発熱体でも、確実に冷却できる。 Further, according to the aspect of the present invention, since the plurality of heating elements are thermally connected to one planar heat pipe, the number of parts of the planar heat pipe can be reduced and the structure can be simplified. Further, according to the aspect of the present invention, a plurality of heating elements are thermally connected to one flat heat pipe, and the flat heat pipe heats a tubular heat pipe having excellent heat transport characteristics in a predetermined direction. Therefore, even if the heat generation amounts of the plurality of heat generating elements are different, the flat heat pipe can equalize the heat generating elements, and thus the cooling of the heat generating elements can be made uniform. Furthermore, according to the aspect of the present invention, since the heating element is thermally connected to the planar heat pipe, even in a narrow inner space, for example, a heating element installed in an inner space having a small dimension in the thickness direction, Can be cooled reliably.
　本発明の態様によれば、管状ヒートパイプの放熱部に熱交換手段が設けられていることにより、管状ヒートパイプの放熱特性が向上し、狭小な内部空間に設置された発熱体でも確実に冷却できる。 According to the aspect of the present invention, the heat exchange means is provided in the heat radiating portion of the tubular heat pipe, so that the heat radiating characteristic of the tubular heat pipe is improved, and even a heating element installed in a narrow internal space is reliably cooled. it can.
　本発明の態様によれば、平面型ヒートパイプと管状ヒートパイプとが熱的に接続されているので、平面型ヒートパイプにより、発熱体からの熱が面上に拡散し、放熱面積が増大した状態にて、管状ヒートパイプが稼働する。また、平面型ヒートパイプと管状ヒートパイプが重なり合う位置に発熱体が熱的に接続されるので、発熱体から管状ヒートパイプへ円滑に熱伝達される。従って、本発明のヒートシンク構造は、優れた熱輸送特性や均熱板としての機能を有することで、発熱体に対して優れた冷却性能を発揮できる。 According to the aspect of the present invention, since the planar heat pipe and the tubular heat pipe are thermally connected, the heat from the heating element is diffused on the surface by the planar heat pipe, and the heat radiation area is increased. In the state, the tubular heat pipe operates. Further, since the heating element is thermally connected to the position where the planar heat pipe and the tubular heat pipe overlap, heat is smoothly transferred from the heating element to the tubular heat pipe. Therefore, the heat sink structure of the present invention can exhibit excellent cooling performance with respect to the heating element by having excellent heat transport characteristics and a function as a soaking plate.
　また、本発明の態様によれば、複数の発熱体を冷却する場合であって、各発熱体の発熱量が相違する場合に、相対的に発熱量の少ない発熱体は、均熱板としての機能を有する平面型ヒートパイプにて冷却できるので、その分、管状ヒートパイプの熱輸送量を低減できる。 Further, according to the aspect of the present invention, when a plurality of heating elements are cooled and the heating values of the respective heating elements are different, the heating elements having a relatively small heating value are Since it can cool with the planar heat pipe which has a function, the heat transport amount of a tubular heat pipe can be reduced by that much.
　本発明の態様によれば、平面型ヒートパイプを用い、また、熱的に接続される発熱体の数量は、特に制限されないので、簡易な構成にて、狭小化した内部空間に設置された発熱体に対して優れた冷却性能を発揮できる。 According to the aspect of the present invention, since the number of heating elements that use a planar heat pipe and are thermally connected is not particularly limited, heat generated in a narrowed internal space with a simple configuration. Excellent cooling performance for the body.
　本発明の態様によれば、管状ヒートパイプが平面型ヒートパイプよりも発熱体の方向に配置されることにより、発熱体の熱が管状ヒートパイプに円滑に伝達されつつ、管状ヒートパイプを介して平面型ヒートパイプに伝達された発熱体からの熱が、平面型ヒートパイプの均熱板としての機能により面上に拡散することで放熱面積が増大する。従って、上記態様では、管状ヒートパイプの熱輸送量を低減でき、ひいては、管状ヒートパイプを扁平化（薄型化）、細管化できる。このように、管状ヒートパイプを扁平化、細管化できるので、ヒートシンク構造をより小型化できる。 According to the aspect of the present invention, the tubular heat pipe is disposed in the direction of the heating element rather than the planar heat pipe, so that the heat of the heating element is smoothly transferred to the tubular heat pipe, and the The heat from the heating element transmitted to the flat heat pipe is diffused on the surface by the function of the flat plate heat pipe as a soaking plate, thereby increasing the heat radiation area. Therefore, in the said aspect, the amount of heat transport of a tubular heat pipe can be reduced, and by extension, a tubular heat pipe can be flattened (thinned) and thinned. Thus, since the tubular heat pipe can be flattened and thinned, the heat sink structure can be further downsized.
　本発明の態様によれば、平面型ヒートパイプが管状ヒートパイプよりも発熱体の方向に配置されることにより、発熱体の熱が、まず、平面型ヒートパイプの均熱板としての機能により面上に拡散してから、管状ヒートパイプに伝達されるので、平面型ヒートパイプにホットスポットが生じるのを防止できる。このように、平面型ヒートパイプにホットスポットが生じるのを防止できるので、発熱体に対して優れた冷却性能を発揮できる。 According to the aspect of the present invention, the planar heat pipe is arranged in the direction of the heating element rather than the tubular heat pipe, so that the heat of the heating element is first brought about by the function as the soaking plate of the planar heat pipe. Since it is transmitted to the tubular heat pipe after being diffused upward, it is possible to prevent hot spots from occurring in the planar heat pipe. Thus, since a hot spot can be prevented from occurring in the planar heat pipe, excellent cooling performance can be exhibited for the heating element.
　本発明の態様によれば、管状ヒートパイプの放熱部に熱交換手段が設けられていることにより、管状ヒートパイプの放熱特性が向上し、狭小な内部空間に設置された発熱体でも確実に冷却できる。 According to the aspect of the present invention, the heat exchange means is provided in the heat radiating portion of the tubular heat pipe, so that the heat radiating characteristic of the tubular heat pipe is improved, and even a heating element installed in a narrow internal space is reliably cooled. it can.
本発明の第１実施形態例に係るヒートシンク構造の側面視の説明図である。It is explanatory drawing of the side view of the heat sink structure which concerns on the example of 1st Embodiment of this invention. 本発明の第１実施形態例に係るヒートシンク構造の平面視の説明図である。It is explanatory drawing of planar view of the heat sink structure which concerns on the example of 1st Embodiment of this invention. 本発明の第２実施形態例に係るヒートシンク構造の平面視の説明図である。It is explanatory drawing of planar view of the heat sink structure which concerns on the 2nd Example of this invention. 本発明の第３実施形態例に係るヒートシンク構造の側面視の説明図である。It is explanatory drawing of the side view of the heat sink structure which concerns on the example of 3rd Embodiment of this invention. （a）図は、本発明の第４実施形態例に係るヒートシンク構造の側面視の説明図、（b）図は、本発明の第４実施形態例に係るヒートシンク構造の平面視の説明図である。(A) is a side view of the heat sink structure according to the fourth embodiment of the present invention, and (b) is a plan view of the heat sink structure according to the fourth embodiment of the present invention. is there. （a）図は、本発明の第５実施形態例に係るヒートシンク構造の側面視の説明図、（b）図は、本発明の第５実施形態例に係るヒートシンク構造の平面視の説明図である。(A) The figure is explanatory drawing of the side view of the heat sink structure which concerns on 5th Example of this invention, (b) Drawing is explanatory drawing of the planar view of the heat sink structure which concerns on 5th Embodiment of this invention. is there. 本発明の第６実施形態例に係るヒートシンク構造の側面視の説明図である。It is explanatory drawing of the side view of the heat sink structure which concerns on the 6th Example of this invention. 本発明の第６実施形態例に係るヒートシンク構造の平面視の説明図である。It is explanatory drawing of planar view of the heat sink structure which concerns on the 6th Example of this invention. （a）図は、本発明の第７実施形態例に係るヒートシンク構造の側面視の説明図、（b）図は、本発明の第７実施形態例に係るヒートシンク構造の平面視の説明図である。(A) The figure is explanatory drawing of the side view of the heat sink structure concerning 7th Embodiment of this invention, (b) The figure is explanatory drawing of the planar view of the heat sink structure concerning 7th Embodiment of this invention is there. （a）図は、本発明の第８実施形態例に係るヒートシンク構造の側面視の説明図、（b）図は、本発明の第８実施形態例に係るヒートシンク構造の平面視の説明図である。(A) The figure is explanatory drawing of the side view of the heat sink structure which concerns on 8th Embodiment of this invention, (b) The figure is explanatory drawing of the planar view of the heat sink structure which concerns on 8th Embodiment of this invention. is there. 本発明の第９実施形態例に係るヒートシンク構造の平面視の説明図である。It is explanatory drawing of planar view of the heat sink structure which concerns on the 9th Example of this invention.
　以下に、本発明の第１実施形態例に係るヒートシンク構造について、図面を用いながら説明する。図１、２に示すように、第１実施形態例に係るヒートシンク構造１は、平面型ヒートパイプ１０と、平面型ヒートパイプ１０と熱的に接続された管状ヒートパイプ１２と、を備えている。ヒートシンク構造１では、平面型ヒートパイプ１０の平面型コンテナ１１と管状ヒートパイプ１２の管状コンテナ１３とが直接接することで、平面型ヒートパイプ１０と管状ヒートパイプ１２とが、熱的に接続されている。 The heat sink structure according to the first embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the heat sink structure 1 according to the first embodiment includes a planar heat pipe 10 and a tubular heat pipe 12 thermally connected to the planar heat pipe 10. . In the heat sink structure 1, the planar container 11 of the planar heat pipe 10 and the tubular container 13 of the tubular heat pipe 12 are in direct contact with each other so that the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected. Yes.
　また、平面型ヒートパイプ１０には、基板１０２に実装された複数の発熱体（図１では、２つの発熱体、第１の発熱体１００と第２の発熱体１０１）が、熱的に接続されている。すなわち、第１の発熱体１００、第２の発熱体１０１が、同じ平面型ヒートパイプ１０に熱的に接続されている。従って、第１の発熱体１００、第２の発熱体１０１が、平面型ヒートパイプ１０を介して熱的に接続されている。平面型ヒートパイプ１０のうち、第１の発熱体１００、第２の発熱体１０１が熱的に接続された部位が、平面型ヒートパイプ１０の受熱部として機能する。 In addition, a plurality of heating elements mounted on the substrate 102 (two heating elements, the first heating element 100 and the second heating element 101 in FIG. 1) are thermally connected to the planar heat pipe 10. Has been. That is, the first heating element 100 and the second heating element 101 are thermally connected to the same planar heat pipe 10. Accordingly, the first heating element 100 and the second heating element 101 are thermally connected via the planar heat pipe 10. A portion of the flat heat pipe 10 where the first heat generating body 100 and the second heat generating body 101 are thermally connected functions as a heat receiving portion of the flat heat pipe 10.
　また、平面型ヒートパイプ１０は、第１の発熱体１００、第２の発熱体１０１に載置されることで第１の発熱体１００、第２の発熱体１０１と熱的に接続され、また、固定されている。 The planar heat pipe 10 is thermally connected to the first heating element 100 and the second heating element 101 by being placed on the first heating element 100 and the second heating element 101, and It has been fixed.
　なお、ヒートシンク構造１では、第１の発熱体１００、第２の発熱体１０１に直接接するように、平面型ヒートパイプ１０が載置されていてもよく、図示しない熱伝導グリースを平面型ヒートパイプ１０と第１の発熱体１００、第２の発熱体１０１との間に挿入してもよい。 In the heat sink structure 1, the flat heat pipe 10 may be placed so as to be in direct contact with the first heat generating body 100 and the second heat generating body 101. 10 may be inserted between the first heating element 100 and the second heating element 101.
　図１、２に示すように、平面型ヒートパイプ１０のうち、第１の発熱体１００、第２の発熱体１０１が熱的に接続された部位から所定距離離れた平面型ヒートパイプ１０の周縁部に、管状ヒートパイプ１２の一方の端部１４が熱的に接続されている。ヒートシンク構造１では、１つの管状ヒートパイプ１２が、平面型ヒートパイプ１０の周縁部に熱的に接続されている。平面型ヒートパイプ１０のうち、管状ヒートパイプ１２の一方の端部１４が熱的に接続された部位が、平面型ヒートパイプ１０の放熱部として機能する。 As shown in FIGS. 1 and 2, the peripheral edge of the planar heat pipe 10 that is a predetermined distance away from the portion of the planar heat pipe 10 where the first heating element 100 and the second heating element 101 are thermally connected. One end portion 14 of the tubular heat pipe 12 is thermally connected to the portion. In the heat sink structure 1, one tubular heat pipe 12 is thermally connected to the peripheral portion of the planar heat pipe 10. Of the flat heat pipe 10, a portion where one end 14 of the tubular heat pipe 12 is thermally connected functions as a heat radiating portion of the flat heat pipe 10.
　平面型ヒートパイプ１０と管状ヒートパイプ１２とを熱的に接続する方法は、特に限定されず、例えば、平面型ヒートパイプ１０の平面型コンテナ１１に、管状ヒートパイプ１２の管状コンテナ１３を、はんだ付け、かしめ等により固定することで、平面型ヒートパイプ１０と管状ヒートパイプ１２とを熱的に接続することができる。 The method of thermally connecting the planar heat pipe 10 and the tubular heat pipe 12 is not particularly limited. For example, the tubular container 13 of the tubular heat pipe 12 is soldered to the planar container 11 of the planar heat pipe 10. The flat heat pipe 10 and the tubular heat pipe 12 can be thermally connected by fixing by attaching, caulking, or the like.
　平面型ヒートパイプ１０に熱的に接続された管状ヒートパイプ１２の一方の端部１４が、管状ヒートパイプ１２の受熱部として機能する。一方で、管状ヒートパイプ１２のうち、一方の端部１４以外の部位、すなわち、中央部１５と他方の端部１６は、平面型ヒートパイプ１０と接していない。このうち、管状ヒートパイプ１２の他方の端部１６が、管状ヒートパイプ１２の放熱部として機能する。なお、管状ヒートパイプ１２には、平面型ヒートパイプ１０と異なり、発熱体は接続されない。なお、管状ヒートパイプ１２は、図１、２に示すように、曲げ加工してもよく、直線状の形状にて使用してもよい。また、管状ヒートパイプ１２は、熱的接続性を向上させるために、一部または全体を扁平加工してもよい。 The one end portion 14 of the tubular heat pipe 12 thermally connected to the planar heat pipe 10 functions as a heat receiving portion of the tubular heat pipe 12. On the other hand, portions of the tubular heat pipe 12 other than the one end portion 14, that is, the center portion 15 and the other end portion 16 are not in contact with the planar heat pipe 10. Among these, the other end portion 16 of the tubular heat pipe 12 functions as a heat radiating portion of the tubular heat pipe 12. Note that, unlike the planar heat pipe 10, no heating element is connected to the tubular heat pipe 12. The tubular heat pipe 12 may be bent as shown in FIGS. 1 and 2 or may be used in a linear shape. Moreover, in order to improve thermal connectivity, the tubular heat pipe 12 may be partially or entirely flattened.
　ヒートシンク構造１では、管状ヒートパイプ１２は、受熱部も含めて全体が扁平加工されている。また、管状ヒートパイプ１２の一方の端部１４（受熱部）は、平面型ヒートパイプ１０の平面方向に沿って延在している。すなわち、管状ヒートパイプ１２の一方の端部１４は、平面視において平面型ヒートパイプ１０の平面方向に沿って延在している。管状ヒートパイプ１２の中央部１５と他方の端部１６も、一方の端部１４と同様に、平面型ヒートパイプ１０の平面方向に沿って延在している。従って、管状ヒートパイプ１２の熱輸送方向は、平面型ヒートパイプ１０の平面方向に対して略平行方向となっている。 In the heat sink structure 1, the entire tubular heat pipe 12 including the heat receiving portion is flattened. In addition, one end portion 14 (heat receiving portion) of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10. That is, one end 14 of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10 in plan view. The central portion 15 and the other end portion 16 of the tubular heat pipe 12 also extend along the planar direction of the planar heat pipe 10, similarly to the one end portion 14. Therefore, the heat transport direction of the tubular heat pipe 12 is substantially parallel to the planar direction of the planar heat pipe 10.
　ヒートシンク構造１では、管状ヒートパイプ１２の他方の端部１６（すなわち、管状ヒートパイプ１２の放熱部）に、熱交換手段として、放熱フィン１７が取り付けられている。また、放熱フィン１７と平面型ヒートパイプ１０との間には、送風ファン１０３が配置されている。送風ファン１０３からの冷却風が放熱フィン１７へ供給される。 In the heat sink structure 1, a heat radiating fin 17 is attached to the other end portion 16 of the tubular heat pipe 12 (that is, a heat radiating portion of the tubular heat pipe 12) as heat exchange means. A blower fan 103 is disposed between the heat radiating fins 17 and the planar heat pipe 10. Cooling air from the blower fan 103 is supplied to the radiation fins 17.
　ヒートシンク構造１では、複数の放熱フィン１７が管状ヒートパイプ１２の他方の端部１６に取り付けられることで、管状ヒートパイプ１２の放熱部から外部環境へ、円滑に熱が放出される。また、放熱フィン１７と平面型ヒートパイプ１０との間に送風ファン１０３が配置されていることにより、送風ファン１０３が稼働することで、放熱フィン１７へ冷却風が供給されるだけでなく、平面型ヒートパイプ１０から放熱フィン１７の方向へ気流が生じて、この気流が、平面型ヒートパイプ１０を冷却する冷却風としても機能する。 In the heat sink structure 1, heat is smoothly released from the heat radiating portion of the tubular heat pipe 12 to the external environment by attaching the plurality of heat radiating fins 17 to the other end portion 16 of the tubular heat pipe 12. Further, since the blower fan 103 is disposed between the heat radiation fins 17 and the planar heat pipe 10, the blower fan 103 is operated, so that not only cooling air is supplied to the heat radiation fins 17, but also a flat surface. An air flow is generated from the mold heat pipe 10 toward the radiation fins 17, and this air flow also functions as cooling air for cooling the planar heat pipe 10.
　平面型ヒートパイプ１０は、平面型コンテナ１１と、平面型コンテナ１１の内部空間に封入された作動流体（図示せず）と、平面型コンテナ１１の内部空間に設けられたウィック構造体（図示せず）とを有している。また、管状ヒートパイプ１２は、管状コンテナ１３と、管状コンテナ１３の内部空間に封入された作動流体（図示せず）と、管状コンテナ１３の内部空間に設けられたウィック構造体（図示せず）とを有している。 The flat heat pipe 10 includes a flat container 11, a working fluid (not shown) sealed in the internal space of the flat container 11, and a wick structure (not shown) provided in the internal space of the flat container 11. Z). The tubular heat pipe 12 includes a tubular container 13, a working fluid (not shown) sealed in the inner space of the tubular container 13, and a wick structure (not shown) provided in the inner space of the tubular container 13. And have.
　平面型コンテナ１１及び管状コンテナ１３の材料としては、例えば、銅、銅合金、アルミニウム、アルミニウム合金、ニッケル、ニッケル合金、ステンレス、チタン等を挙げることができる。また、作動流体としては、平面型コンテナ１１及び管状コンテナ１３の材料との適合性に応じて、適宜選択可能であり、例えば、水、代替フロン、フロリナート等のフルオロカーボン類、シクロペンタン等を挙げることができる。 Examples of the material of the flat container 11 and the tubular container 13 include copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, stainless steel, titanium, and the like. Further, the working fluid can be appropriately selected according to the compatibility with the material of the planar container 11 and the tubular container 13, and examples thereof include water, fluorocarbons such as chlorofluorocarbons and fluorinate, and cyclopentane. Can do.
　ウィック構造体としては、銅粉等の金属粉の焼結体、金属メッシュ、ワイヤ、平面型コンテナ１１及び管状コンテナ１３の内面に形成されたグルーブ等を挙げることができる。 Examples of the wick structure include a sintered body of metal powder such as copper powder, a metal mesh, a wire, a groove formed on the inner surface of the planar container 11 and the tubular container 13.
　冷却対象である発熱体としては、特に限定されないが、基板１０２（例えば、電子機器に内蔵された回路基板）に実装された中央演算処理装置、グラフィックチップ（ＧＰＵ、ＶＧＡ）、メモリー、コンデンサ、電源等を挙げることができる。 The heating element to be cooled is not particularly limited, but a central processing unit, graphic chip (GPU, VGA), memory, capacitor, power supply mounted on the substrate 102 (for example, a circuit board built in an electronic device). Etc.
　次に、ヒートシンク構造１の冷却作用の仕組みについて説明する。平面型ヒートパイプ１０の受熱部が、第１の発熱体１００、第２の発熱体１０１から受熱すると、平面型ヒートパイプ１０の受熱部から、管状ヒートパイプ１２の一方の端部１４と接続された平面型ヒートパイプ１０の放熱部へ、第１の発熱体１００、第２の発熱体１０１からの熱が輸送される。平面型ヒートパイプ１０の受熱部以外の平面部が、平面型ヒートパイプ１０の放熱部として機能する。平面型ヒートパイプ１０の受熱部から放熱部へ輸送された熱の一部は、平面型ヒートパイプ１０の放熱部から管状ヒートパイプ１２の一方の端部１４、すなわち、管状ヒートパイプ１２の受熱部へ伝達される。管状ヒートパイプ１２の受熱部へ伝達された熱は、管状ヒートパイプ１２の他方の端部１６、すなわち、管状ヒートパイプ１２の放熱部へ輸送され、管状ヒートパイプ１２の放熱部から放熱フィン１７を介して外部環境へ放出される。 Next, the cooling mechanism of the heat sink structure 1 will be described. When the heat receiving part of the flat heat pipe 10 receives heat from the first heat generating element 100 and the second heat generating element 101, the heat receiving part of the flat heat pipe 10 is connected to one end 14 of the tubular heat pipe 12. The heat from the first heating element 100 and the second heating element 101 is transported to the heat radiating part of the flat heat pipe 10. A flat surface portion other than the heat receiving portion of the flat heat pipe 10 functions as a heat radiating portion of the flat heat pipe 10. Part of the heat transported from the heat receiving portion of the planar heat pipe 10 to the heat radiating portion is from the heat radiating portion of the flat heat pipe 10 to one end 14 of the tubular heat pipe 12, that is, the heat receiving portion of the tubular heat pipe 12. Is transmitted to. The heat transferred to the heat receiving portion of the tubular heat pipe 12 is transported to the other end portion 16 of the tubular heat pipe 12, that is, the heat radiating portion of the tubular heat pipe 12. To the outside environment.
　つまり、平面型ヒートパイプ１０が受熱した第１の発熱体１００と第２の発熱体１０１の熱は、管状ヒートパイプ１２によって、放熱フィン１７の部位まで輸送されることで、外部環境へ円滑に放出できる。 That is, the heat of the first heating element 100 and the second heating element 101 received by the flat heat pipe 10 is transported to the site of the radiation fin 17 by the tubular heat pipe 12, so that it can be smoothly transferred to the external environment. Can be released.
　ヒートシンク構造１では、第１の発熱体１００及び第２の発熱体１０１上に載置される状態で、第１の発熱体１００及び第２の発熱体１０１と熱的に接続されるので、平面型ヒートパイプの内部空間の閉塞や狭小化を確実に防止でき、ひいては、優れた熱輸送特性を発揮して、複数の発熱体を確実に冷却することができる。 Since the heat sink structure 1 is thermally connected to the first heating element 100 and the second heating element 101 while being placed on the first heating element 100 and the second heating element 101, it is flat. It is possible to reliably prevent the internal space of the mold heat pipe from being blocked and narrowed, and thus exhibit excellent heat transport characteristics, and to reliably cool a plurality of heating elements.
　また、ヒートシンク構造１では、複数の発熱体（第１の発熱体１００及び第２の発熱体１０１）が１つの平面型ヒートパイプ１０に熱的に接続されるので、平面型ヒートパイプ１０の部品点数を低減できるとともに、ヒートシンク構造１を簡素化できる。また、ヒートシンク構造１では、複数の発熱体が１つの平面型ヒートパイプ１０に熱的に接続され、平面型ヒートパイプ１０が、放熱フィン１７の設置部位へ熱を輸送する管状ヒートパイプ１２に熱的に接続されているので、複数の発熱体の発熱量が異なっても、平面型ヒートパイプ１０が各発熱体を均熱化でき、ひいては、各発熱体の冷却を均一化できる。さらに、ヒートシンク構造１では、各発熱体は平面型ヒートパイプに熱的に接続されるので、狭小な内部空間、例えば、厚さ方向の寸法が小さい内部空間に設置された発熱体でも、確実に冷却できる。 Further, in the heat sink structure 1, a plurality of heating elements (the first heating element 100 and the second heating element 101) are thermally connected to one planar heat pipe 10. The number of points can be reduced and the heat sink structure 1 can be simplified. Further, in the heat sink structure 1, a plurality of heating elements are thermally connected to one flat heat pipe 10, and the flat heat pipe 10 is heated to the tubular heat pipe 12 that transports heat to the installation site of the radiation fins 17. Therefore, even if the heat generation amounts of the plurality of heat generating elements are different, the flat heat pipe 10 can equalize the heat generating elements, and thus can uniformly cool the heat generating elements. Further, in the heat sink structure 1, since each heating element is thermally connected to the planar heat pipe, even in the case of a heating element installed in a narrow internal space, for example, an internal space having a small dimension in the thickness direction, it is ensured. Can be cooled.
　次に、本発明の第２実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第１実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to a second embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the first embodiment of the present invention will be described using the same reference numerals.
　第１実施形態例に係るヒートシンク構造１では、平面型ヒートパイプ１０の周縁部に、管状ヒートパイプ１２が１つ、熱的に接続されていたが、これに代えて、第２実施形態例に係るヒートシンク構造２では、図３に示すように、平面型ヒートパイプ１０の周縁部に、２つの管状ヒートパイプ１２、１２’が熱的に接続されている。 In the heat sink structure 1 according to the first embodiment, one tubular heat pipe 12 is thermally connected to the peripheral portion of the planar heat pipe 10, but instead of this, the second embodiment is used. In the heat sink structure 2, as shown in FIG. 3, two tubular heat pipes 12 and 12 ′ are thermally connected to the peripheral portion of the planar heat pipe 10.
　ヒートシンク構造２では、平面型ヒートパイプ１０の周縁部のうち、所定の１箇所に管状ヒートパイプ１２が熱的に接続されているだけでなく、管状ヒートパイプ１２に対向する平面型ヒートパイプ１０の周縁部の位置に、他の管状ヒートパイプ１２’が熱的に接続されている。なお、他の管状ヒートパイプ１２’の放熱部にも、管状ヒートパイプ１２の放熱部と同様に、放熱フィン１７が設けられている。 In the heat sink structure 2, the tubular heat pipe 12 is not only thermally connected to a predetermined portion of the peripheral portion of the planar heat pipe 10, but also the planar heat pipe 10 facing the tubular heat pipe 12. Another tubular heat pipe 12 'is thermally connected to the position of the peripheral edge. Note that, similarly to the heat radiating portion of the tubular heat pipe 12, heat radiating fins 17 are also provided in the heat radiating portions of the other tubular heat pipes 12 '.
　平面型ヒートパイプ１０の周縁部に、２つの管状ヒートパイプ１２が熱的に接続されていても、ヒートシンク構造１と同様に、複数の発熱体を確実に冷却することができる。すなわち、平面型ヒートパイプ１０に熱的に接続される管状ヒートパイプ１２の数量は、１つでも複数でも、特に限定されず、発熱体の発熱量や発熱体の数量等、使用状況に応じて、適宜選択可能である。 Even if the two tubular heat pipes 12 are thermally connected to the peripheral edge of the planar heat pipe 10, a plurality of heating elements can be reliably cooled as in the heat sink structure 1. That is, the number of the tubular heat pipes 12 that are thermally connected to the planar heat pipe 10 is not particularly limited, and may be one or more, depending on use conditions such as the amount of heat generated by the heating element and the number of heating elements. Can be appropriately selected.
　次に、本発明の第３実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第１、第２実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to a third embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the first and second embodiments of the present invention will be described using the same reference numerals.
　第１実施形態例に係るヒートシンク構造１では、各発熱体（第１の発熱体１００、第２の発熱体１０１）に直接接するまたは熱伝導グリースを介して、平面型ヒートパイプ１０が熱的に接続されていたが、これに代えて、第３実施形態例に係るヒートシンク構造３では、図４に示すように、平面型ヒートパイプ１０と発熱体との間に熱伝導性部材１８が挿入されている。なお、ヒートシンク構造３では、第１の発熱体１００、第２の発熱体１０１に加えて、第３の発熱体１０４が、すなわち、３つの発熱体が、基板１０２に実装されている。 In the heat sink structure 1 according to the first embodiment, the planar heat pipe 10 is thermally contacted directly with each heating element (the first heating element 100 and the second heating element 101) or through heat conductive grease. However, instead of this, in the heat sink structure 3 according to the third embodiment, as shown in FIG. 4, a heat conductive member 18 is inserted between the planar heat pipe 10 and the heating element. ing. In the heat sink structure 3, the third heating element 104, that is, three heating elements are mounted on the substrate 102 in addition to the first heating element 100 and the second heating element 101.
　上記態様は、第１の発熱体１００、第２の発熱体１０１及び第３の発熱体１０４の高さ方向の寸法が、相互に異なる場合に、特に、有効である。すなわち、高さ方向の寸法が小さい発熱体（図４では、第２の発熱体１０１及び第３の発熱体１０４）と平面型ヒートパイプ１０との間に熱伝導性部材１８を挿入して、高さ方向の寸法が最も大きい発熱体（図４では、第１の発熱体１００）と略同じ高さとする。これにより、平面型ヒートパイプ１０に撓み等の変形を施すことなく、複数の発熱体（第１の発熱体１００、第２の発熱体１０１、第３の発熱体１０４）と平面型ヒートパイプ１０とを熱的に接続できる。 The above aspect is particularly effective when the first heating element 100, the second heating element 101, and the third heating element 104 have mutually different height dimensions. That is, the heat conductive member 18 is inserted between the heating element (the second heating element 101 and the third heating element 104 in FIG. 4) and the flat heat pipe 10 having a small dimension in the height direction, The heating element has the same height as that of the heating element having the largest dimension in the height direction (first heating element 100 in FIG. 4). As a result, a plurality of heating elements (first heating element 100, second heating element 101, and third heating element 104) and the planar heat pipe 10 can be obtained without deforming the planar heat pipe 10 such as bending. Can be connected thermally.
　熱伝導性部材１８としては、例えば、熱伝導シート等を挙げることができる。なお、図４では、第１の発熱体１００と平面型ヒートパイプ１０の接触面に、熱伝導性を向上させるために熱伝導グリース１９が塗布されている。 Examples of the heat conductive member 18 include a heat conductive sheet. In FIG. 4, thermal conductive grease 19 is applied to the contact surface between the first heating element 100 and the flat heat pipe 10 in order to improve thermal conductivity.
　次に、本発明の第４実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第１、第２、第３実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to a fourth embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the first, second, and third embodiments of the present invention will be described using the same reference numerals.
　図５（a）、（b）に示すように、第４実施形態例に係るヒートシンク構造４では、平面型ヒートパイプ１０の発熱体側の面（裏面）に、さらに付勢部材２０が設けられている。平面型ヒートパイプ１０の裏面に付勢部材２０が設けられていることにより、平面型ヒートパイプ１０の撓み等の変形を防止しつつ、平面型ヒートパイプ１０を第１の発熱体１００及び第２の発熱体１０１方向へ付勢させることができる。よって、平面型ヒートパイプ１０と第１の発熱体１００及び第２の発熱体１０１との熱的接続性が向上し、また、平面型ヒートパイプ１０を確実に基板１０２に固定することができる。なお、管状ヒートパイプ１２は、平面型ヒートパイプ１０の発熱体側ではない面（表面）に取り付けられている。 As shown in FIGS. 5A and 5B, in the heat sink structure 4 according to the fourth embodiment, a biasing member 20 is further provided on the surface (back surface) of the flat heat pipe 10 on the heating element side. Yes. Since the biasing member 20 is provided on the back surface of the planar heat pipe 10, the planar heat pipe 10 is prevented from being deformed such as bending, and the planar heat pipe 10 is connected to the first heating element 100 and the second heating element 100. The heating element 101 can be biased. Therefore, the thermal connectivity between the planar heat pipe 10 and the first and second heating elements 100 and 101 is improved, and the planar heat pipe 10 can be securely fixed to the substrate 102. The tubular heat pipe 12 is attached to a surface (surface) that is not the heating element side of the flat heat pipe 10.
　ヒートシンク構造４では、平面型ヒートパイプ１０の裏面に２つの付勢部材２０が設けられている。それぞれの付勢部材２０は、相互に対向するように、平面型ヒートパイプ１０の周縁部に配置されている。また、２つの付勢部材２０間に、各発熱体（第１の発熱体１００及び第２の発熱体１０１）が配置されている。従って、全ての発熱体に対して、基板１０２側へ付勢された状態の平面型ヒートパイプ１０が、熱的に接続されている。付勢部材２０は、第１の発熱体１００及び第２の発熱体１０１が実装された基板１０２に固定される。 In the heat sink structure 4, two urging members 20 are provided on the back surface of the planar heat pipe 10. The respective urging members 20 are arranged at the peripheral edge of the planar heat pipe 10 so as to face each other. In addition, each heating element (the first heating element 100 and the second heating element 101) is disposed between the two biasing members 20. Accordingly, the planar heat pipe 10 in a state of being urged toward the substrate 102 is thermally connected to all the heating elements. The biasing member 20 is fixed to the substrate 102 on which the first heating element 100 and the second heating element 101 are mounted.
　付勢部材２０は、平面型ヒートパイプ１０の裏面と面接触した状態で取り付けられる第１の平坦部２０－１と、基板１０２に面接触した状態で取り付けられる第２の平坦部２０－２と、第１の平坦部２０－１と第２の平坦部２０－２とを繋ぐ連結部２０－３と、を有している。連結部２０－３が、付勢作用を発揮する。 The urging member 20 includes a first flat portion 20-1 attached in a surface contact with the back surface of the planar heat pipe 10, and a second flat portion 20-2 attached in a surface contact with the substrate 102. And a connecting portion 20-3 that connects the first flat portion 20-1 and the second flat portion 20-2. The connecting portion 20-3 exhibits a biasing action.
　第１の平坦部２０－１の平面型ヒートパイプ１０裏面への取り付け手段は、特に限定されず、例えば、はんだ付け等を挙げることができる。第２の平坦部２０－２の基板１０２への固定手段は、特に限定されず、ヒートシンク構造４では、第２の平坦部２０－２は、ねじ２１によって基板１０２に固定されている。すなわち、第２の平坦部２０－２には、ねじ２１を挿通する貫通孔（図示せず）が設けられ、基板１０２にはねじ穴（図示せず）が設けられ、ねじ２１を貫通孔に挿通してねじ穴に螺合することで、付勢部材２０は基板１０２に固定される。 The means for attaching the first flat portion 20-1 to the back surface of the planar heat pipe 10 is not particularly limited, and examples thereof include soldering. The means for fixing the second flat portion 20-2 to the substrate 102 is not particularly limited, and in the heat sink structure 4, the second flat portion 20-2 is fixed to the substrate 102 with screws 21. That is, the second flat portion 20-2 is provided with a through hole (not shown) through which the screw 21 is inserted, the substrate 102 is provided with a screw hole (not shown), and the screw 21 is used as a through hole. The biasing member 20 is fixed to the substrate 102 by being inserted and screwed into the screw hole.
　付勢部材２０としては、例えば、金属製の板バネやコイル等のバネ部材が挙げられる。 Examples of the urging member 20 include spring members such as metal leaf springs and coils.
　次に、本発明の第５実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第１、第２、第３、第４実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to a fifth embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the first, second, third, and fourth embodiments of the present invention will be described using the same reference numerals.
　第４実施形態例に係るヒートシンク構造４では、全ての発熱体に対して、基板１０２側へ付勢された状態の平面型ヒートパイプ１０が、熱的に接続されていたが、これに代えて、第５実施形態例に係るヒートシンク構造５では、図６（a）、（b）に示すように、複数の発熱体（図６では、第１の発熱体１００と第２の発熱体１０１の２つの発熱体）のうち、一部の発熱体（図６では、第１の発熱体１００）に対してのみ、基板１０２側へ付勢された状態の平面型ヒートパイプ１０が、熱的に接続されている。また、平面型ヒートパイプ１０には、ねじ２１を挿通する貫通孔２２が設けられ、付勢部材２０にも、ねじ２１を挿通する貫通孔（図示せず）が設けられている。基板１０２には、ねじ穴（図示せず）が設けられている。ねじ２１を、平面型ヒートパイプ１０の貫通孔２２と付勢部材２０の貫通孔にそれぞれ挿通して、基板１０２のねじ穴に螺合することで、平面型ヒートパイプ１０と付勢部材２０は基板１０２に固定されている。 In the heat sink structure 4 according to the fourth embodiment, the planar heat pipe 10 in a state of being urged toward the substrate 102 is thermally connected to all the heating elements. In the heat sink structure 5 according to the fifth embodiment, as shown in FIGS. 6A and 6B, a plurality of heating elements (in FIG. 6, the first heating element 100 and the second heating element 101 are formed. Of the two heating elements), only a part of the heating elements (in FIG. 6, the first heating element 100), the planar heat pipe 10 that is biased toward the substrate 102 is thermally It is connected. Further, the planar heat pipe 10 is provided with a through hole 22 through which the screw 21 is inserted, and the biasing member 20 is also provided with a through hole (not shown) through which the screw 21 is inserted. The substrate 102 is provided with a screw hole (not shown). The planar heat pipe 10 and the urging member 20 are inserted into the through hole 22 of the planar heat pipe 10 and the through hole of the urging member 20 and screwed into the threaded holes of the substrate 102, respectively. It is fixed to the substrate 102.
　また、図６（b）に示すように、ヒートシンク構造５では、２つの付勢部材２０間に、第１の発熱体１００は配置されているが、第２の発熱体１０１は配置されていない。第２の発熱体１０１に対しては、平面型ヒートパイプ１０のうち、基板１０２方向へ付勢されていない部位が、熱的に接続されている。また、第２の発熱体１０１には、平面型ヒートパイプ１０との間に、熱伝導シート等の熱伝導性部材１８が挿入され、熱伝導性部材１８の有する緩衝機能によって、平面型ヒートパイプ１０が第１の発熱体１００の方向へ付勢されてもいる。 Further, as shown in FIG. 6B, in the heat sink structure 5, the first heating element 100 is disposed between the two biasing members 20, but the second heating element 101 is not disposed. . A portion of the flat heat pipe 10 that is not biased toward the substrate 102 is thermally connected to the second heating element 101. Further, a thermal conductive member 18 such as a thermal conductive sheet is inserted between the second heat generating body 101 and the planar heat pipe 10, and the planar heat pipe is provided by a buffering function of the thermal conductive member 18. 10 is also biased toward the first heating element 100.
　上記態様でも、平面型ヒートパイプ１０の撓み等の変形を防止しつつ、平面型ヒートパイプ１０と第１の発熱体１００との熱的接続性が向上し、また、平面型ヒートパイプ１０を確実に基板１０２に固定できる。 Even in the above aspect, the thermal connectivity between the planar heat pipe 10 and the first heating element 100 is improved while preventing deformation such as bending of the planar heat pipe 10, and the planar heat pipe 10 is reliably secured. It can be fixed to the substrate 102.
　次に、本発明の他の実施形態例について説明する。上記第１～第５実施形態例では、管状ヒートパイプの放熱部に熱交換手段として放熱フィンが設けられていたが、使用状況に応じて、熱交換手段を設けなくてもよい。また、上記第１～第５実施形態例では、放熱フィン近傍に送風ファンが設置されていたが、使用状況に応じて、送風ファンを設置しなくてもよい。 Next, another embodiment of the present invention will be described. In the first to fifth embodiments, the heat radiating fins are provided as the heat exchanging means in the heat radiating portion of the tubular heat pipe. However, the heat exchanging means may not be provided depending on the use situation. In the first to fifth embodiments, the blower fan is installed in the vicinity of the heat radiating fins. However, the blower fan may not be installed depending on the use situation.
　第１、第４実施形態例に係るヒートシンク構造では、各発熱体に直接接して、または熱伝導グリースを介して、平面型ヒートパイプが載置されていたが、発熱体と平面型ヒートパイプとの間に熱伝導性部材を配置してもよい。 In the heat sink structure according to the first and fourth embodiments, the planar heat pipe is placed in direct contact with each heating element or via thermal conductive grease. However, the heating element and the planar heat pipe are You may arrange | position a heat conductive member between these.
　上記した本発明のヒートシンク構造は、優れた熱輸送特性を有しつつ、簡易な構成にて、狭小化した内部空間に設置された複数の発熱体の冷却を均一化できるので、例えば、厚さ方向の寸法の小さい空間に、複数設置された発熱体を冷却する分野で、利用価値が高い。 The heat sink structure of the present invention described above has excellent heat transport characteristics, and with a simple configuration, can uniformly cool a plurality of heating elements installed in a narrowed internal space. The utility value is high in the field of cooling a plurality of heating elements installed in a space with small dimensions.
　以下に、本発明の第６実施形態例に係るヒートシンク構造について、図面を用いながら説明する。図７、８に示すように、第６実施形態例に係るヒートシンク構造６は、平面型ヒートパイプ１０と、平面型ヒートパイプ１０と熱的に接続された管状ヒートパイプ１２と、を備えている。ヒートシンク構造６では、平面型ヒートパイプ１０の平面型コンテナ１１と管状ヒートパイプ１２の管状コンテナ１３とが直接接することで、平面型ヒートパイプ１０と管状ヒートパイプ１２とが、熱的に接続されている。 Hereinafter, a heat sink structure according to a sixth embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 7 and 8, the heat sink structure 6 according to the sixth embodiment includes a planar heat pipe 10 and a tubular heat pipe 12 thermally connected to the planar heat pipe 10. . In the heat sink structure 6, the planar container 11 of the planar heat pipe 10 and the tubular container 13 of the tubular heat pipe 12 are in direct contact, so that the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected. Yes.
　ヒートシンク構造６では、管状ヒートパイプ１２が、平面型ヒートパイプ１０よりも発熱体の方向に配置されている。管状ヒートパイプ１２には、基板１０２に実装された第１の発熱体１００が熱的に接続され、平面型ヒートパイプ１０には、基板１０２に実装された第２の発熱体１０１が熱的に接続されている。従って、第１の発熱体１００は、管状ヒートパイプ１２を介して平面型ヒートパイプ１０と熱的に接続され、第２の発熱体１０１は、平面型ヒートパイプ１０を介して管状ヒートパイプ１２と熱的に接続されている。従って、平面型ヒートパイプ１０は、均熱板としての機能を有する。 In the heat sink structure 6, the tubular heat pipe 12 is arranged in the direction of the heating element rather than the planar heat pipe 10. The tubular heat pipe 12 is thermally connected to the first heating element 100 mounted on the substrate 102, and the planar heat pipe 10 is thermally connected to the second heating element 101 mounted on the substrate 102. It is connected. Accordingly, the first heating element 100 is thermally connected to the planar heat pipe 10 via the tubular heat pipe 12, and the second heating element 101 is connected to the tubular heat pipe 12 via the planar heat pipe 10. Thermally connected. Accordingly, the planar heat pipe 10 has a function as a soaking plate.
　なお、ヒートシンク構造６では、管状ヒートパイプ１２は第１の発熱体１００と直接接することで、第１の発熱体１００と熱的に接続され、平面型ヒートパイプ１０は第２の発熱体１０１と直接接することで、第２の発熱体１０１と熱的に接続されていてもよく、図示しない熱伝導グリースを、管状ヒートパイプ１２と第１の発熱体１００、平面型ヒートパイプ１０と第２の発熱体１０１との間に挿入して、熱的に接続してもよい。 In the heat sink structure 6, the tubular heat pipe 12 is in direct contact with the first heating element 100 to be thermally connected to the first heating element 100, and the planar heat pipe 10 is connected to the second heating element 101. The heat generating grease (not shown) may be thermally connected to the second heating element 101 by direct contact, and the tubular heat pipe 12 and the first heating element 100, the planar heat pipe 10 and the second heating pipe 101 are connected to each other. It may be inserted between the heating element 101 and thermally connected.
　図７、８に示すように、平面型ヒートパイプ１０に管状ヒートパイプ１２の一方の端部１４が熱的に接続され、管状ヒートパイプ１２の一方の端部１４に第１の発熱体１００が熱的に接続されている。つまり、図８に示すように、平面型ヒートパイプ１０と管状ヒートパイプ１２が平面視において重なり合う位置に、第１の発熱体１００が熱的に接続される。一方で、第２の発熱体１０１は、管状ヒートパイプ１２とは平面視において重なり合わない位置にて、平面型ヒートパイプ１０と熱的に接続される。ヒートシンク構造６では、１つの管状ヒートパイプ１２が、平面型ヒートパイプ１０に熱的に接続されている。 As shown in FIGS. 7 and 8, one end 14 of the tubular heat pipe 12 is thermally connected to the planar heat pipe 10, and the first heating element 100 is connected to the one end 14 of the tubular heat pipe 12. Thermally connected. That is, as shown in FIG. 8, the first heating element 100 is thermally connected at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap in a plan view. On the other hand, the second heating element 101 is thermally connected to the planar heat pipe 10 at a position that does not overlap the tubular heat pipe 12 in plan view. In the heat sink structure 6, one tubular heat pipe 12 is thermally connected to the planar heat pipe 10.
　平面型ヒートパイプ１０と管状ヒートパイプ１２とを熱的に接続する方法は、特に限定されず、例えば、平面型ヒートパイプ１０の平面型コンテナ１１に、管状ヒートパイプ１２の管状コンテナ１３を、はんだ付け、かしめ等により固定することで、平面型ヒートパイプ１０と管状ヒートパイプ１２とを熱的に接続することができる。 The method of thermally connecting the planar heat pipe 10 and the tubular heat pipe 12 is not particularly limited. For example, the tubular container 13 of the tubular heat pipe 12 is soldered to the planar container 11 of the planar heat pipe 10. The flat heat pipe 10 and the tubular heat pipe 12 can be thermally connected by fixing by attaching, caulking, or the like.
　平面型ヒートパイプ１０及び第１の発熱体１００と熱的に接続された管状ヒートパイプ１２の一方の端部１４が、管状ヒートパイプ１２の受熱部として機能する。一方で、管状ヒートパイプ１２のうち、一方の端部１４以外の部位、すなわち、中央部１５と他方の端部１６は、平面型ヒートパイプ１０と接していない。このうち、管状ヒートパイプ１２の他方の端部１６が、管状ヒートパイプ１２の放熱部として機能する。なお、管状ヒートパイプ１２は、図７、８に示すように、曲げ加工してもよく、直線状の形状にて使用してもよい。また、管状ヒートパイプ１２は、熱的接続性を向上させるために、一部または全体を扁平加工してもよい。 One end portion 14 of the tubular heat pipe 12 thermally connected to the planar heat pipe 10 and the first heating element 100 functions as a heat receiving portion of the tubular heat pipe 12. On the other hand, portions of the tubular heat pipe 12 other than the one end portion 14, that is, the center portion 15 and the other end portion 16 are not in contact with the planar heat pipe 10. Among these, the other end portion 16 of the tubular heat pipe 12 functions as a heat radiating portion of the tubular heat pipe 12. The tubular heat pipe 12 may be bent as shown in FIGS. 7 and 8 or may be used in a linear shape. Moreover, in order to improve thermal connectivity, the tubular heat pipe 12 may be partially or entirely flattened.
　ヒートシンク構造６では、管状ヒートパイプ１２は、受熱部も含めて全体が扁平加工されている。また、管状ヒートパイプ１２の一方の端部１４（受熱部）は、平面型ヒートパイプ１０の平面方向に沿って延在している。すなわち、管状ヒートパイプ１２の一方の端部１４は、平面視において平面型ヒートパイプ１０の平面方向に沿って延在している。管状ヒートパイプ１２の中央部１５と他方の端部１６も、一方の端部１４と同様に、平面型ヒートパイプ１０の平面方向に沿って延在している。従って、管状ヒートパイプ１２の熱輸送方向は、平面型ヒートパイプ１０の平面方向に対して略平行方向となっている。 In the heat sink structure 6, the entire tubular heat pipe 12 including the heat receiving portion is flattened. In addition, one end portion 14 (heat receiving portion) of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10. That is, one end 14 of the tubular heat pipe 12 extends along the planar direction of the planar heat pipe 10 in plan view. The central portion 15 and the other end portion 16 of the tubular heat pipe 12 also extend along the planar direction of the planar heat pipe 10, similarly to the one end portion 14. Therefore, the heat transport direction of the tubular heat pipe 12 is substantially parallel to the planar direction of the planar heat pipe 10.
　ヒートシンク構造６では、管状ヒートパイプ１２の他方の端部１６（すなわち、管状ヒートパイプ１２の放熱部）に、熱交換手段として、放熱フィン１７が取り付けられている。また、放熱フィン１７と平面型ヒートパイプ１０との間には、送風ファン１０３が配置されている。送風ファン１０３からの冷却風が放熱フィン１７へ供給される。 In the heat sink structure 6, heat radiating fins 17 are attached to the other end portion 16 of the tubular heat pipe 12 (that is, the heat radiating portion of the tubular heat pipe 12) as heat exchange means. A blower fan 103 is disposed between the heat radiating fins 17 and the planar heat pipe 10. Cooling air from the blower fan 103 is supplied to the radiation fins 17.
　ヒートシンク構造６では、複数の放熱フィン１７が管状ヒートパイプ１２の他方の端部１６に取り付けられることで、管状ヒートパイプ１２の放熱部から外部環境へ、円滑に熱が放出される。また、送風ファン１０３の設置位置は特に限定されないが、放熱フィン１７と平面型ヒートパイプ１０との間に送風ファン１０３が配置されると、送風ファン１０３が稼働することで、放熱フィン１７へ冷却風が供給されるだけでなく、平面型ヒートパイプ１０から放熱フィン１７の方向へ気流が生じて、この気流が、平面型ヒートパイプ１０を冷却する冷却風としても機能する。 In the heat sink structure 6, the plurality of radiating fins 17 are attached to the other end 16 of the tubular heat pipe 12, so that heat is smoothly released from the radiating portion of the tubular heat pipe 12 to the external environment. The installation position of the blower fan 103 is not particularly limited, but when the blower fan 103 is disposed between the heat radiation fin 17 and the planar heat pipe 10, the blower fan 103 is operated to cool the heat radiation fin 17. Not only the wind is supplied, but also an air flow is generated from the planar heat pipe 10 toward the radiating fins 17, and this air flow also functions as cooling air for cooling the planar heat pipe 10.
　平面型ヒートパイプ１０は、平面型コンテナ１１と、平面型コンテナ１１の内部空間に封入された作動流体（図示せず）と、平面型コンテナ１１の内部空間に設けられたウィック構造体（図示せず）とを有している。また、管状ヒートパイプ１２は、管状コンテナ１３と、管状コンテナ１３の内部空間に封入された作動流体（図示せず）と、管状コンテナ１３の内部空間に設けられたウィック構造体（図示せず）とを有している。 The flat heat pipe 10 includes a flat container 11, a working fluid (not shown) sealed in the internal space of the flat container 11, and a wick structure (not shown) provided in the internal space of the flat container 11. Z). The tubular heat pipe 12 includes a tubular container 13, a working fluid (not shown) sealed in the inner space of the tubular container 13, and a wick structure (not shown) provided in the inner space of the tubular container 13. And have.
　平面型コンテナ１１及び管状コンテナ１３の材料としては、例えば、銅、銅合金、アルミニウム、アルミニウム合金、ニッケル、ニッケル合金、ステンレス、チタン等を挙げることができる。また、作動流体としては、平面型コンテナ１１及び管状コンテナ１３の材料との適合性に応じて、適宜選択可能であり、例えば、水、代替フロン、フロリナート等のフルオロカーボン類、シクロペンタン等を挙げることができる。 Examples of the material of the flat container 11 and the tubular container 13 include copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, stainless steel, titanium, and the like. Further, the working fluid can be appropriately selected according to the compatibility with the material of the planar container 11 and the tubular container 13, and examples thereof include water, fluorocarbons such as chlorofluorocarbons and fluorinate, and cyclopentane. Can do.
　ウィック構造体としては、銅粉等の金属粉の焼結体、金属メッシュ、ワイヤ、平面型コンテナ１１及び管状コンテナ１３の内面に形成されたグルーブ等を挙げることができる。 Examples of the wick structure include a sintered body of metal powder such as copper powder, a metal mesh, a wire, a groove formed on the inner surface of the planar container 11 and the tubular container 13.
　冷却対象である発熱体としては、特に限定されないが、基板１０２（例えば、電子機器に内蔵された回路基板）に実装された中央演算処理装置、グラフィックチップ（ＧＰＵ、ＶＧＡ）、メモリー、コンデンサ、電源等を挙げることができる。 The heating element to be cooled is not particularly limited, but a central processing unit, graphic chip (GPU, VGA), memory, capacitor, power supply mounted on the substrate 102 (for example, a circuit board built in an electronic device). Etc.
　次に、ヒートシンク構造６の冷却作用の仕組みについて説明する。管状ヒートパイプ１２の一方の端部１４（受熱部）が、第１の発熱体１００から受熱すると、第１の発熱体１００から管状ヒートパイプ１２の受熱部へ伝達された熱は、管状ヒートパイプ１２の他方の端部１６、すなわち、管状ヒートパイプ１２の放熱部へ輸送され、管状ヒートパイプ１２の放熱部から放熱フィン１７を介して外部環境へ放出される。 Next, the cooling mechanism of the heat sink structure 6 will be described. When one end portion 14 (heat receiving portion) of the tubular heat pipe 12 receives heat from the first heating element 100, the heat transferred from the first heating element 100 to the heat receiving portion of the tubular heat pipe 12 is the tubular heat pipe. 12 is transported to the heat radiating portion of the tubular heat pipe 12, and is discharged from the heat radiating portion of the tubular heat pipe 12 to the external environment via the heat radiating fins 17.
　また、管状ヒートパイプ１２の受熱部へ伝達された熱の一部は、管状ヒートパイプ１２の放熱部へは輸送されずに、管状ヒートパイプ１２の一方の端部１４と熱的に接続された平面型ヒートパイプ１０へ伝達される。管状ヒートパイプ１２の受熱部から平面型ヒートパイプ１０へ伝達された熱は、平面型ヒートパイプ１０の平面に沿って拡散しつつ、平面型ヒートパイプ１０から放出される。一方で、平面型ヒートパイプ１０が第２の発熱体１０１から受熱すると、第２の発熱体１０１から平面型ヒートパイプ１０へ伝達された熱は、第１の発熱体１００から伝達された熱と同様、平面型ヒートパイプ１０の平面に沿って拡散しつつ、平面型ヒートパイプ１０から放出される。 Further, a part of the heat transmitted to the heat receiving portion of the tubular heat pipe 12 was thermally connected to one end portion 14 of the tubular heat pipe 12 without being transported to the heat radiating portion of the tubular heat pipe 12. It is transmitted to the planar heat pipe 10. The heat transferred from the heat receiving portion of the tubular heat pipe 12 to the planar heat pipe 10 is released from the planar heat pipe 10 while diffusing along the plane of the planar heat pipe 10. On the other hand, when the planar heat pipe 10 receives heat from the second heating element 101, the heat transmitted from the second heating element 101 to the planar heat pipe 10 is the heat transmitted from the first heating element 100. Similarly, it is discharged from the planar heat pipe 10 while diffusing along the plane of the planar heat pipe 10.
　また、第２の発熱体１０１の発熱量によっては、第２の発熱体１０１から平面型ヒートパイプ１０へ伝達された熱は、平面型ヒートパイプ１０の平面に沿って拡散しつつ、その一部は管状ヒートパイプ１２の一方の端部１４へ輸送され、管状ヒートパイプ１２の放熱部から放熱フィン１７を介して外部環境へ放出される。従って、平面型ヒートパイプ１０は、均熱板としての機能を有する。 Depending on the amount of heat generated by the second heating element 101, the heat transferred from the second heating element 101 to the flat heat pipe 10 is diffused along the plane of the flat heat pipe 10, and a part thereof. Is transported to one end 14 of the tubular heat pipe 12 and discharged from the heat radiating portion of the tubular heat pipe 12 to the external environment via the heat radiating fins 17. Accordingly, the planar heat pipe 10 has a function as a soaking plate.
　つまり、ヒートシンク構造６が受熱した第１の発熱体１００と第２の発熱体１０１の熱は、管状ヒートパイプ１２によって放熱フィン１７の部位まで輸送されることで外部環境へ円滑に放出されつつ、平面型ヒートパイプ１０の平面に沿って拡散して、平面型ヒートパイプ１０からも放出される。 That is, the heat of the first heating element 100 and the second heating element 101 received by the heat sink structure 6 is smoothly released to the external environment by being transported to the site of the radiation fin 17 by the tubular heat pipe 12, It diffuses along the plane of the planar heat pipe 10 and is also released from the planar heat pipe 10.
　このように、ヒートシンク構造６では、平面型ヒートパイプ１０と管状ヒートパイプ１２とが熱的に接続されているので、平面型ヒートパイプ１０により、第１の発熱体１００からの熱と第２の発熱体１０１からの熱が、面上に拡散し、放熱面積が増大した状態にて、管状ヒートパイプ１２が熱輸送機能を発揮する。また、平面型ヒートパイプ１０と管状ヒートパイプ１２が重なり合う位置に、複数の発熱体（第１の発熱体１００と第２の発熱体１０１）のうちの少なくとも一部の発熱体（第１の発熱体１００）が熱的に接続されるので、第１の発熱体１００から管状ヒートパイプ１２へ円滑に熱伝達される。従って、ヒートシンク構造６は、優れた熱輸送特性と均熱板としての機能を有することで、発熱体に対して優れた冷却性能を発揮できる。 Thus, in the heat sink structure 6, the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected, so that the heat from the first heating element 100 and the second heat pipe 10 are heated by the planar heat pipe 10. In the state where the heat from the heating element 101 diffuses on the surface and the heat radiation area increases, the tubular heat pipe 12 exhibits a heat transport function. In addition, at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap each other, at least a part of the plurality of heating elements (first heating element 100 and second heating element 101) (first heating element). Since the body 100) is thermally connected, heat is smoothly transferred from the first heating element 100 to the tubular heat pipe 12. Therefore, the heat sink structure 6 can exhibit excellent cooling performance with respect to the heating element by having an excellent heat transport characteristic and a function as a soaking plate.
　また、ヒートシンク構造６では、複数の発熱体（第１の発熱体１００と第２の発熱体１０１）を冷却する場合であって、各発熱体の発熱量が相違する場合に、相対的に発熱量の小さい発熱体（例えば、第２の発熱体１０１）は、均熱板としての機能を有する平面型ヒートパイプ１０にて冷却できるので、その分、管状ヒートパイプ１２の熱輸送量を低減できる。 Further, in the heat sink structure 6, when a plurality of heating elements (the first heating element 100 and the second heating element 101) are cooled and the amount of heat generated by each heating element is different, heat generation is relatively performed. A small amount of the heating element (for example, the second heating element 101) can be cooled by the flat heat pipe 10 having a function as a soaking plate, so that the heat transport amount of the tubular heat pipe 12 can be reduced accordingly. .
　さらに、ヒートシンク構造６では、平面型ヒートパイプ１０を用い、また、熱的に接続される発熱体の数量は、特に制限されないので、簡易な構成にて、狭小化した内部空間に設置された発熱体に対して優れた冷却性能を発揮できる。 Furthermore, in the heat sink structure 6, the flat heat pipe 10 is used, and the number of heat generating elements to be thermally connected is not particularly limited, so that heat generated in a narrowed internal space with a simple configuration. Excellent cooling performance for the body.
　ヒートシンク構造６では、管状ヒートパイプ１２が平面型ヒートパイプ１０よりも発熱体（第１の発熱体１００と第２の発熱体１０１）の方向（基板１０２の方向）に配置されることにより、発熱体（図７、８では、第１の発熱体１００）の熱が管状ヒートパイプ１２に円滑に伝達される。また、各発熱体（第１の発熱体１００と第２の発熱体１０１）から伝達された熱は、平面型ヒートパイプ１０の均熱板としての機能により、平面型ヒートパイプ１０の面上を拡散していくことで、放熱面積が増大する。従って、管状ヒートパイプ１２の熱輸送量を低減でき、ひいては、管状ヒートパイプ１２を扁平化、細管化できる。このように、管状ヒートパイプ１２を扁平化、細管化できるので、ヒートシンク構造６をより小型化できる。 In the heat sink structure 6, the tubular heat pipe 12 is arranged in the direction of the heating element (the first heating element 100 and the second heating element 101) (the direction of the substrate 102) rather than the planar heat pipe 10, thereby generating heat. The heat of the body (the first heating element 100 in FIGS. 7 and 8) is smoothly transferred to the tubular heat pipe 12. In addition, the heat transmitted from each heating element (the first heating element 100 and the second heating element 101) is transmitted on the surface of the planar heat pipe 10 by the function as a soaking plate of the planar heat pipe 10. By diffusing, the heat dissipation area increases. Therefore, the amount of heat transport of the tubular heat pipe 12 can be reduced, and as a result, the tubular heat pipe 12 can be flattened and thinned. Thus, since the tubular heat pipe 12 can be flattened and thinned, the heat sink structure 6 can be further downsized.
　次に、本発明の第７実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第６実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to a seventh embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the sixth embodiment of the present invention will be described using the same reference numerals.
　第６実施形態例に係るヒートシンク構造６では、管状ヒートパイプ１２には、基板１０２に実装された第１の発熱体１００が接続され、平面型ヒートパイプ１０には、基板１０２に実装された第２の発熱体１０１が接続されていたが、これに代えて、第７実施形態例に係るヒートシンク構造７では、図９（a）、（b）に示すように、平面型ヒートパイプ１０には、発熱体が接続されていない。 In the heat sink structure 6 according to the sixth embodiment, the tubular heat pipe 12 is connected to the first heating element 100 mounted on the substrate 102, and the planar heat pipe 10 is mounted on the substrate 102. In the heat sink structure 7 according to the seventh embodiment, instead of this, as shown in FIGS. 9A and 9B, the flat heat pipe 10 includes The heating element is not connected.
　つまり、図９に示すように、平面型ヒートパイプ１０と管状ヒートパイプ１２が平面視において重なり合う位置に、第１の発熱体１００が熱的に接続される。一方で、管状ヒートパイプ１２及び平面型ヒートパイプ１０とは平面視において重なり合わない位置には、発熱体は接続されていない。 That is, as shown in FIG. 9, the first heating element 100 is thermally connected at a position where the planar heat pipe 10 and the tubular heat pipe 12 overlap in a plan view. On the other hand, the heating element is not connected to a position where the tubular heat pipe 12 and the planar heat pipe 10 do not overlap in plan view.
　ヒートシンク構造７でも、平面型ヒートパイプ１０と管状ヒートパイプ１２とが熱的に接続されているので、平面型ヒートパイプ１０により、第１の発熱体１００からの熱が、平面型ヒートパイプ１０の平面に沿って拡散していき、放熱面積が増大した状態にて、管状ヒートパイプ１２が熱輸送機能を発揮する。また、平面型ヒートパイプ１０と管状ヒートパイプ１２が重なり合う位置に、発熱体（第１の発熱体１００）が熱的に接続されるので、第１の発熱体１００から管状ヒートパイプ１２へ円滑に熱伝達される。従って、ヒートシンク構造７でも、ヒートシンク構造６と同様、優れた熱輸送特性と均熱板としての機能を有することで、発熱体に対して優れた冷却性能を発揮できる。 Also in the heat sink structure 7, since the planar heat pipe 10 and the tubular heat pipe 12 are thermally connected, the heat from the first heating element 100 is caused by the planar heat pipe 10 to be generated in the planar heat pipe 10. The tubular heat pipe 12 exhibits a heat transport function in a state where the heat radiating area increases while diffusing along the plane. In addition, since the heating element (first heating element 100) is thermally connected to the position where the planar heat pipe 10 and the tubular heat pipe 12 overlap each other, the first heating element 100 is smoothly connected to the tubular heat pipe 12. Heat transferred. Therefore, like the heat sink structure 6, the heat sink structure 7 can exhibit excellent cooling performance with respect to the heating element by having excellent heat transport characteristics and a function as a soaking plate.
　次に、本発明の第８実施形態例に係るヒートシンク構造について、図面を用いながら説明する。本発明の第６、第７実施形態例に係るヒートシンク構造と同じ構成要素については同じ符号を用いて説明する。 Next, a heat sink structure according to an eighth embodiment of the present invention will be described with reference to the drawings. The same components as those of the heat sink structure according to the sixth and seventh embodiments of the present invention will be described using the same reference numerals.
　第６実施形態例に係るヒートシンク構造６では、管状ヒートパイプ１２が、平面型ヒートパイプ１０よりも発熱体の方向に配置されていたが、これに代えて、第８実施形態例に係るヒートシンク構造８では、図１０（a）、（b）に示すように、平面型ヒートパイプ１０が、管状ヒートパイプ１２よりも発熱体の方向に配置されている。 In the heat sink structure 6 according to the sixth embodiment, the tubular heat pipe 12 is arranged in the direction of the heating element rather than the planar heat pipe 10, but instead, the heat sink structure according to the eighth embodiment. In FIG. 8, as shown in FIGS. 10A and 10B, the planar heat pipe 10 is arranged in the direction of the heating element rather than the tubular heat pipe 12.
　平面型ヒートパイプ１０には、基板１０２に実装された発熱体（図１０では、複数の発熱体、すなわち、第１の発熱体１００と第２の発熱体１０１）が接続されている。一方で、管状ヒートパイプ１２には、発熱体が接続されていない。従って、いずれの発熱体も、すなわち、第１の発熱体１００も第２の発熱体１０１も、平面型ヒートパイプ１０を介して管状ヒートパイプ１２と熱的に接続されている。従って、平面型ヒートパイプ１０は、均熱板としての機能を有する。 The planar heat pipe 10 is connected to a heating element mounted on the substrate 102 (in FIG. 10, a plurality of heating elements, that is, the first heating element 100 and the second heating element 101). On the other hand, a heating element is not connected to the tubular heat pipe 12. Accordingly, both of the heating elements, that is, the first heating element 100 and the second heating element 101 are thermally connected to the tubular heat pipe 12 via the planar heat pipe 10. Accordingly, the planar heat pipe 10 has a function as a soaking plate.
　図１０（b）に示すように、平面型ヒートパイプ１０と管状ヒートパイプ１２が平面視において重なり合う位置に、複数の発熱体のうちの一部の発熱体（図１０（b）では、第１の発熱体１００）が、平面型ヒートパイプ１０と熱的に接続される。一方で、他の一部の発熱体（図１０（b）では、第２の発熱体１０１）は、管状ヒートパイプ１２とは平面視において重なり合わない位置にて、平面型ヒートパイプ１０と熱的に接続される。 As shown in FIG. 10 (b), some of the plurality of heating elements (in FIG. 10 (b), the first heat pipe 10 and the tubular heat pipe 12 overlap each other in plan view). The heating element 100) is thermally connected to the planar heat pipe 10. On the other hand, the other part of the heating elements (in FIG. 10B, the second heating element 101) is heated with the planar heat pipe 10 at a position that does not overlap with the tubular heat pipe 12 in plan view. Connected.
　なお、図１０（a）に示すように、ヒートシンク構造８では、第１の発熱体１００は平面型ヒートパイプ１０と直接接する、または熱伝導グリース（図示せず）を介して接することで、平面型ヒートパイプ１０と熱的に接続されている。一方で、平面型ヒートパイプ１０と第２の発熱体１０１との間には、熱伝導シート等の熱伝導性部材１８が挿入されており、第２の発熱体１０１は、熱伝導性部材１８を介して、平面型ヒートパイプ１０と熱的に接続されている。 In addition, as shown to Fig.10 (a), in the heat sink structure 8, the 1st heat generating body 100 touches the flat type heat pipe 10 directly, or contacts through thermal conductive grease (not shown), and is plane. The mold heat pipe 10 is thermally connected. On the other hand, a heat conductive member 18 such as a heat conductive sheet is inserted between the planar heat pipe 10 and the second heat generating element 101, and the second heat generating element 101 is a heat conductive member 18. It is thermally connected to the planar heat pipe 10 via
　このように、高さ方向の寸法が異なる発熱体が、ヒートシンク構造８と熱的に接続される場合、高さ方向の寸法が小さい発熱体（図１０（a）では、第２の発熱体１０１）と平面型ヒートパイプ１０との間に熱伝導性部材１８を挿入することで、熱抵抗の増大を防止しつつ、高さ方向の寸法が異なる発熱体間の高さ調整ができる。従って、平面型ヒートパイプ１０の撓み等の変形を防止できるので、平面型ヒートパイプ１０の内部空間を維持でき、結果、ヒートシンク構造８の冷却性能の低下を防止できる。 As described above, when the heating elements having different dimensions in the height direction are thermally connected to the heat sink structure 8, the heating elements having a small dimension in the height direction (in FIG. 10A, the second heating element 101). ) And the planar heat pipe 10, it is possible to adjust the height between the heating elements having different dimensions in the height direction while preventing an increase in thermal resistance. Therefore, deformation such as bending of the planar heat pipe 10 can be prevented, so that the internal space of the planar heat pipe 10 can be maintained, and as a result, a decrease in cooling performance of the heat sink structure 8 can be prevented.
　次に、ヒートシンク構造８の冷却作用の仕組みについて説明する。平面型ヒートパイプ１０が、第１の発熱体１００と第２の発熱体１０１から受熱すると、第１の発熱体１００からの熱と第２の発熱体１０１からの熱は、ともに、平面型ヒートパイプ１０の平面に沿って平面型ヒートパイプ１０上を拡散しながら、平面型ヒートパイプ１０から放出される。また、管状ヒートパイプ１２は、第１の発熱体１００と平面視において重なり合う位置に設けられ、管状ヒートパイプ１２の一方の端部１４（受熱部）が、平面型ヒートパイプ１０と直接接している。従って、平面型ヒートパイプ１０から放出されなかった熱は、管状ヒートパイプ１２の受熱部へ伝達される。管状ヒートパイプ１２の受熱部へ伝達された熱は、管状ヒートパイプ１２の受熱部から管状ヒートパイプ１２の他方の端部１６（放熱部）へ輸送され、放熱部に設けられた放熱フィン１７から外部環境へ放出される。従って、管状ヒートパイプ１２は、平面型ヒートパイプ１０から放出されなかった熱を放熱フィンの部位へ輸送する機能を有する。 Next, the mechanism of the cooling action of the heat sink structure 8 will be described. When the planar heat pipe 10 receives heat from the first heating element 100 and the second heating element 101, both the heat from the first heating element 100 and the heat from the second heating element 101 are planar heat. It is discharged from the planar heat pipe 10 while diffusing on the planar heat pipe 10 along the plane of the pipe 10. The tubular heat pipe 12 is provided at a position overlapping the first heating element 100 in plan view, and one end portion 14 (heat receiving portion) of the tubular heat pipe 12 is in direct contact with the planar heat pipe 10. . Therefore, the heat that has not been released from the planar heat pipe 10 is transmitted to the heat receiving portion of the tubular heat pipe 12. The heat transferred to the heat receiving portion of the tubular heat pipe 12 is transported from the heat receiving portion of the tubular heat pipe 12 to the other end 16 (heat radiating portion) of the tubular heat pipe 12 and from the heat radiating fins 17 provided in the heat radiating portion. Released to the outside environment. Therefore, the tubular heat pipe 12 has a function of transporting heat that has not been released from the planar heat pipe 10 to the portion of the radiation fin.
　平面型ヒートパイプ１０が管状ヒートパイプ１２よりも発熱体（第１の発熱体１００、第２の発熱体１０１）の方向に配置されることにより、発熱体の熱が、平面型ヒートパイプ１０の均熱板としての機能により、まず、平面型ヒートパイプ１０の平面に沿って拡散してから、管状ヒートパイプ１２に伝達される。従って、平面型ヒートパイプ１０にホットスポットが生じるのを防止できる。このように、ヒートシンク構造８は、平面型ヒートパイプ１０にホットスポットが生じるのを防止できるので、発熱体に対して優れた冷却性能を発揮できる。また、平面型ヒートパイプ１０は、平面視において、平面型ヒートパイプ１０と接続されている発熱体（第１の発熱体１００、第２の発熱体１０１）の全体を覆うことができるので、発熱体からヒートシンク構造８への熱伝達性が向上する。 By arranging the planar heat pipe 10 in the direction of the heating element (the first heating element 100 and the second heating element 101) rather than the tubular heat pipe 12, the heat of the heating element is changed to that of the planar heat pipe 10. Due to the function as a heat equalizing plate, the heat is first diffused along the plane of the flat heat pipe 10 and then transmitted to the tubular heat pipe 12. Accordingly, hot spots can be prevented from occurring in the planar heat pipe 10. Thus, since the heat sink structure 8 can prevent a hot spot from being generated in the planar heat pipe 10, it can exhibit excellent cooling performance for the heating element. Further, the planar heat pipe 10 can cover the entirety of the heating elements (the first heating element 100 and the second heating element 101) connected to the planar heat pipe 10 in plan view. The heat transfer from the body to the heat sink structure 8 is improved.
　次に、本発明の他の実施形態例について説明する。上記第６～第８実施形態例では、管状ヒートパイプの設置数は１本であったが、その数は特に限定されず、ヒートシンク構造の使用状況に応じて、複数設置してもよい。 Next, another embodiment of the present invention will be described. In the sixth to eighth embodiments, the number of tubular heat pipes is one. However, the number is not particularly limited, and a plurality of tubular heat pipes may be installed according to the use state of the heat sink structure.
　例えば、第６実施形態例に係るヒートシンク構造６では、基板１０２に実装された第１の発熱体１００に、１本の管状ヒートパイプ１２が熱的に接続されていたが、これに代えて、図１１に示すように、第９実施形態例に係るヒートシンク構造９では、基板１０２に実装された第１の発熱体１００に、複数（図１１では、２本）の管状ヒートパイプ１２、１２’が熱的に接続されてもよい。 For example, in the heat sink structure 6 according to the sixth embodiment, one tubular heat pipe 12 is thermally connected to the first heating element 100 mounted on the substrate 102, but instead, As shown in FIG. 11, in the heat sink structure 9 according to the ninth embodiment, a plurality of (two in FIG. 11) tubular heat pipes 12, 12 ′ are provided on the first heating element 100 mounted on the substrate 102. May be thermally connected.
　ヒートシンク構造９では、平面視において、第１の発熱体１００と重なり合う位置に、２本の管状ヒートパイプ１２、１２’が熱的に接続されている。なお、ヒートシンク構造９では、２本の管状ヒートパイプ１２、１２’のうち、平面視において第１の発熱体１００と重なり合う部位では、並列に配置され、平面視において平面型ヒートパイプ１０と重なり合わない部位では、一方の管状ヒートパイプ１２と他方の管状ヒートパイプ１２’が、平面型ヒートパイプ１０の中心線を境に略対称となるように配置されている。 In the heat sink structure 9, two tubular heat pipes 12 and 12 ′ are thermally connected to a position overlapping the first heating element 100 in a plan view. Note that, in the heat sink structure 9, of the two tubular heat pipes 12 and 12 ′, the portions that overlap the first heating element 100 in plan view are arranged in parallel and overlap with the planar heat pipe 10 in plan view. In the part which is not present, one tubular heat pipe 12 and the other tubular heat pipe 12 ′ are arranged so as to be substantially symmetrical with respect to the center line of the planar heat pipe 10.
　第１の発熱体１００に、複数の管状ヒートパイプ１２、１２’が熱的に接続されることで、第１の発熱体１００の発熱量が大きくても、第１の発熱体１００を確実に冷却できる。 The plurality of tubular heat pipes 12 and 12 ′ are thermally connected to the first heating element 100, so that the first heating element 100 can be securely connected even when the first heating element 100 generates a large amount of heat. Can be cooled.
　また、平面型ヒートパイプと管状ヒートパイプが平面視において重なり合う位置に、熱的に接続される発熱体の数は、特に限定されず、上記第６～第８実施形態例では、該位置に、１つの発熱体が熱的に接続されていたが、複数の発熱体を熱的に接続してもよい。 In addition, the number of heating elements that are thermally connected to the position where the planar heat pipe and the tubular heat pipe overlap in plan view is not particularly limited. In the sixth to eighth embodiments, the position is Although one heating element is thermally connected, a plurality of heating elements may be thermally connected.
　上記第６～第８実施形態例では、管状ヒートパイプの放熱部に熱交換手段として放熱フィンが設けられていたが、使用状況に応じて、熱交換手段を設けなくてもよい。また、上記第６～第８実施形態例では、放熱フィン近傍に送風ファンが設置されていたが、使用状況に応じて、送風ファンを設置しなくてもよい。また、必要に応じて、発熱体と平面型ヒートパイプまたは管状ヒートパイプとの間に、熱的接続性を向上させるために、熱伝導グリースを塗布してもよい。 In the sixth to eighth embodiments, the heat radiating fins are provided as the heat exchanging means in the heat radiating portion of the tubular heat pipe. However, the heat exchanging means may not be provided depending on the use situation. In the sixth to eighth embodiments, the blower fan is installed in the vicinity of the heat radiating fins. However, the blower fan may not be installed depending on the use situation. Moreover, you may apply | coat heat conductive grease between a heat generating body and a planar heat pipe or a tubular heat pipe as needed in order to improve thermal connectivity.
　上記した本発明のヒートシンク構造は、簡易な構成にて、狭小化した内部空間に設置された発熱体に対し、優れた熱輸送特性や均熱板としての機能を有することで、優れた冷却性能を発揮するので、例えば、基板に実装された発熱体を冷却する分野で、利用価値が高い。 The above-described heat sink structure of the present invention has an excellent cooling performance by having an excellent heat transport characteristic and a function as a heat equalizing plate for a heating element installed in a narrowed internal space with a simple configuration. Therefore, for example, in the field of cooling a heating element mounted on a substrate, the utility value is high.
１、２、３、４、５　　　　　　　　　　ヒートシンク構造
６、７、８、９　　　　　　　　　　　　ヒートシンク構造
１０　　　　　　　　　　　　　　　　　平面型ヒートパイプ
１２　　　　　　　　　　　　　　　　　管状ヒートパイプ
１７　　　　　　　　　　　　　　　　　放熱フィン
２０　　　　　　　　　　　　　　　　　付勢部材 1, 2, 3, 4, 5 Heat sink structure 6, 7, 8, 9 Heat sink structure 10 Planar heat pipe 12 Tubular heat pipe 17 Radiating fin 20 Biasing member

Claims (5)

  1. 　複数の発熱体上に載置されることで該複数の発熱体と熱的に接続される平面型ヒートパイプと、該平面型ヒートパイプの放熱部と受熱部にて熱的に接続された管状ヒートパイプと、を備えたヒートシンク構造。 A planar heat pipe that is placed on a plurality of heating elements to be thermally connected to the plurality of heating elements, and a tube that is thermally connected to the heat radiating portion and the heat receiving portion of the planar heat pipe. A heat sink structure including a heat pipe.
  2. 　前記管状ヒートパイプの放熱部に、熱交換手段が設けられている請求項１に記載のヒートシンク構造。 The heat sink structure according to claim 1, wherein a heat exchanging means is provided in a heat radiating portion of the tubular heat pipe.
  3. 　前記熱交換手段が、放熱フィンを有する請求項２に記載のヒートシンク構造。 The heat sink structure according to claim 2, wherein the heat exchanging means has a radiation fin.
  4. 　前記熱交換手段及び／または管状ヒートパイプの放熱部が、送風ファンの冷却風により冷却される請求項２または３に記載のヒートシンク構造。 The heat sink structure according to claim 2 or 3, wherein the heat exchange means and / or the heat radiating portion of the tubular heat pipe is cooled by cooling air from a blower fan.
  5. 　前記平面型ヒートパイプに付勢部材が設けられ、該付勢部材が、前記発熱体の支持部材に固定される請求項１乃至４のいずれか１項に記載のヒートシンク構造。 The heat sink structure according to any one of claims 1 to 4, wherein a biasing member is provided on the planar heat pipe, and the biasing member is fixed to a support member of the heating element.
PCT/JP2017/024069 2016-07-01 2017-06-30 Heat sink structure WO2018003958A1 (en)

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