US20120305221A1 - Heat pipe-attached heat sink - Google Patents
Heat pipe-attached heat sinkDownload PDFInfo
- Publication number
- US20120305221A1 US20120305221A1US13/152,234US201113152234AUS2012305221A1US 20120305221 A1US20120305221 A1US 20120305221A1US 201113152234 AUS201113152234 AUS 201113152234AUS 2012305221 A1US2012305221 A1US 2012305221A1
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- Prior art keywords
- flat
- bottom block
- heat
- radiation
- heat pipe
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- 230000002093peripheral effectEffects0.000claimsabstractdescription26
- 125000006850spacer groupChemical group0.000claimsabstractdescription19
- 238000009434installationMethods0.000description9
- 238000012546transferMethods0.000description8
- 238000013461designMethods0.000description6
- 239000002918waste heatSubstances0.000description5
- 230000002708enhancing effectEffects0.000description2
- 230000017525heat dissipationEffects0.000description2
- 239000002184metalSubstances0.000description2
- 238000000034methodMethods0.000description2
- 238000003780insertionMethods0.000description1
- 230000037431insertionEffects0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 239000000758substrateSubstances0.000description1
- 239000002699waste materialSubstances0.000description1
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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
- 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
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present inventionrelates to heat sink technology and more particularly, to a heat pipe-attached heat sink, which keeps the attached heat pipes in flush with a flat bottom abutment edge of an extension abutment strip of each radiation fin for direct contact with a heat source for quick transfer of waste head.
- a conventional heat pipe attached heat sinkcomprising: a radiation fin module, one of a number of heat pipes and a metal bottom block.
- the bottom blockis kept in direct contact with the heat source, enabling waste heat to be transferred by the bottom block to the radiation fins of the radiation fin module through the heat pipe(s) for quick dissipation.
- This design of heat sinkutilizes the bottom block, the heat pipe(s) and the radiation fin module to transfer heat in proper order.
- this heat transfer methodhas a low heat dissipation speed and performance.
- Another prior art heat sink designwhich eliminates the use of a metal bottom block and has the heat-absorbing end of each heat pipe be directly press-fitted into a respective mounting groove on each of a number of radiation fins.
- heat pipesAfter connection between heat pipes and radiation fins, heat pipes are kept flattened and kept in parallel for direct contact with the heat source for quick transfer of waste heat from the heat source to the radiation fins for quick dissipation.
- the radiation finsare not directly kept in contact with the surface of the heat source for direct dissipation of waste heat.
- the present inventionhas been accomplished under the circumstances in view. It is the main object of the present invention to provide a heat pipe-attached heat sink, which eliminates the drawbacks of the aforesaid various prior art designs.
- a heat pipe-attached heat sinkcomprises a bottom block, a radiation fin module and one or a number of heat pipes.
- the bottom blockcomprises an opening cut through opposing flat top and bottom walls thereof and a plurality of locating grooves arranged on the flat bottom wall and extended to the opening.
- the radiation fin moduleis fastened to the bottom block, comprising a plurality of first radiation fins and second radiation fins arranged in a stack. Each first radiation fin comprises an extension abutment strip.
- the extension abutment stripcomprises a flat bottom abutment edge, and a plurality of locating grooves located on the flat bottom abutment edge and dividing the flat bottom abutment edge into a plurality of spacer ribs, Further, the extension abutment strips of the first radiation fins form a protruding block that is tightly plugged into the opening of the bottom block.
- the heat pipesare respectively press-fitted into the locating grooves of the bottom block and the locating grooves of the extension abutment strips of the first radiation fins of the radiation fin module.
- Each heat pipecomprises a planar peripheral side exposed outside the radiation fin module and the bottom block for direct contact with an external heat source.
- the flat bottom abutment edge of the extension abutment strip of each first radiation fin, the flat bottom wall of the bottom block and the planar peripheral side of each heat pipeform a coplane for direct contact with the external heat source for quick dissipation of waste heat from the external heat source.
- each first radiation fincomprises at least one locating rib formed in each locating groove at the flat bottom abutment edge thereof for engagement with the periphery of the heat pipes.
- the bottom blockcomprises at least one locating rib formed in each locating groove at the flat bottom wall thereof for engagement with the periphery of the heat pipes.
- the bottom blockfurther comprises a plurality of spacer ribs formed of the flat bottom wall thereof and respectively disposed between each two adjacent ones of the locating grooves of the bottom block corresponding to the spacer ribs of the extension abutment strips of the first radiation fins of the radiation fin module.
- the spacer ribs of the first radiation finshave a height smaller than the depth of the locating grooves of the first radiation fins. Further, the spacer ribs of said bottom block have a height smaller than the depth of the locating grooves of said bottom block.
- each heat pipecomprises a flat protruding peripheral portion protruding over the flat bottom wall of said bottom block; the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module protrude over the flat bottom wall of said bottom block and are kept in flush with the flat protruding peripheral portions of said heat pipes.
- the bottom blockcomprises a plurality of mounting holes for mounting.
- the bottom blockcan be made having a plurality of retaining holes for receiving the first radiation fins and second radiation fins of the radiation fin module tightly.
- the heat pipe-attached heat sinkfurther comprises a second radiation fin module.
- the heat pipeseach have one end thereof respectively extended out of the bottom block and fastened to the second radiation fin module.
- first radiation fins and second radiation fins of the radiation fin modulecan be made having a plurality of through holes.
- the heat pipesare U-shaped pipes each having one end thereof fastened to the locating grooves of the first radiation fins and the locating grooves of the bottom block and an opposite end thereof respectively and tightly press-fitted into the through holes of the first radiation fins and second radiation fins of the radiation fin module.
- the heat pipeseach have a heat-receiving end press-fitted into the locating grooves of the first radiation fins and the locating grooves of the bottom block and a flat protruding peripheral portion located on the heat-receiving end and protruding over the flat bottom wall of the bottom block at a predetermined distance.
- the bottom blockcomprises a flat protrusion protruded from the flat bottom wall thereof and abutted to the opening. Further, the locating grooves of the bottom block are located on the flat protrusion. In this case, the locating grooves of the first radiation fins of the radiation fin module and the locating grooves of the bottom block are disposed at different elevations.
- the flat protrusion of the bottom blockdefines a flat contact surface corresponding to the flat bottom abutment edges of the extension abutment strips of the first radiation fins of the radiation fin module. Further, the flat contact surface of the flat protrusion of the bottom block and the flat bottom abutment edges of the extension abutment strips of the first radiation fins of the radiation fin module are disposed at different elevations.
- FIG. 1is an exploded view of a heat pipe-attached heat sink in accordance with a first embodiment of the present invention.
- FIG. 2is an elevational assembly view of the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.
- FIG. 3is a top view of the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.
- FIG. 4is a sectional view taken along line A-A of FIG. 1 .
- FIG. 5is an elevational view of one radiation fin for the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.
- FIG. 6is a top view of a heat pipe-attached heat sink in accordance with a second embodiment of the present invention.
- FIG. 7is a sectional view taken along line A-A of FIG. 6 .
- FIG. 8is an elevational assembly view of a heat pipe-attached heat sink in accordance with a third embodiment of the present invention.
- FIG. 9is a side view of the heat pipe-attached heat sink in accordance with the third embodiment of the present invention.
- FIG. 10is an elevational view of a heat pipe-attached heat sink in accordance with a fourth embodiment of the present invention.
- FIG. 11is a side view of the heat pipe-attached heat sink in accordance with the fourth embodiment of the present invention.
- FIG. 12is an elevational view of a heat pipe-attached heat sink in accordance with a fifth embodiment of the present invention.
- FIG. 13is a side view of the heat pipe-attached heat sink in accordance with the fifth embodiment of the present invention.
- FIG. 14is an elevational view of a heat pipe-attached heat sink in accordance with a sixth embodiment of the present invention.
- FIG. 15is a side view of the heat pipe-attached heat sink in accordance with the sixth embodiment of the present invention.
- FIG. 16is an elevational view of a heat pipe-attached heat sink in accordance with a seventh embodiment of the present invention.
- FIG. 17is a side view of the heat pipe-attached heat sink in accordance with the seventh embodiment of the present invention.
- FIG. 18is an elevational view of a heat pipe-attached heat sink in accordance with an eighth embodiment of the present invention before installation of heat pipes.
- FIG. 19is a side view of FIG. 18 .
- FIG. 20is a top view of the heat pipe-attached heat sink in accordance with the eighth embodiment of the present invention after installation of heat pipes.
- FIG. 21is a sectional view taken along line A-A of FIG. 29 .
- FIG. 22is an elevational view of the heat pipe-attached heat sink in accordance with the eighth embodiment of the present invention after installation of heat pipes.
- a heat pipe-attached heat sinkin accordance with a first embodiment of the present invention is shown comprising a radiation fin module 10 , at least one heat pipes 20 and a bottom block 30 .
- the radiation fin module 10consists of a plurality of first and second radiation fins 1 ; 1 a arranged in a stack.
- Each first radiation fin 1comprises an extension abutment strip 11 , as shown in FIG. 5 .
- the extension abutment strip 11comprises a flat bottom abutment edge 111 and a plurality of locating grooves 112 located on the flat bottom abutment edge 111 .
- the flat bottom abutment edge 111is divided by the locating grooves 112 into a plurality of spacer ribs 113 .
- the extension abutment strips 11 of the first radiation fins 1form a protruding block 101 , and the locating grooves 112 of each first radiation fin 1 are respectively kept in alignment with that of the other first radiation fins 1 .
- the heat pipes 20each have a planar peripheral side respectively kept in a flush manner.
- the bottom block 30comprises an opening 31 cut through opposing flat top and bottom walls thereof, a plurality of locating grooves 32 arranged on the flat bottom wall at one or two opposite sides relative to the opening 31 , and a plurality of mounting holes 33 cut through the flat top and bottom walls and spaced around the opening 31 .
- the first and second radiation fins 1 ; 1 aare stacked up to form the designed radiation fin module 10 , and then press-fit the protruding block 101 of the radiation fin module 10 into the opening 31 of the bottom block 30 to keep the locating grooves 32 in alignment with the locating grooves 112 of the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10 , and then attach the heat pipes 20 to the flat bottom wall of the bottom block 30 and the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10 to force the heat pipes 20 into tight engagement with the locating grooves 32 of the bottom block 30 and the locating grooves 112 of the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10 , keeping the planar peripheral wall of each of heat pipes 20 and the flat bottom abutment edges 111 of the extension abutment strips 11 in flush with the flat bottom wall of the bottom block 30 for direct contact with the heat source to minimize impedance during heat transfer, eliminating the draw
- the protruding block 101 of the radiation fin module 10has a cross section approximately equal to the cross dimension of the opening 31 of the bottom block 30 .
- the protruding block 101fills up the opening 31 , and the flat bottom abutment edges 111 of the extension abutment strips 11 of the radiation fin module 10 form with the planar peripheral side of each of the heat pipes 20 and the flat bottom wall of the bottom block 30 a co-plane for direct contact with the heat source for quick transfer of waste heat from the heat source.
- each first radiation fin 1further comprises at least one locating rib 114 formed in each locating groove 112 at the flat bottom abutment edge 111 by stamping technology (see FIG. 5 ).
- the locating ribs 114are deformed and forced into engagement with the periphery of the respective heat pipes 20 , enhancing connection tightness between the heat pipes 20 and the radiation fins 1 .
- Locating ribs 321can be formed in the locating grooves 32 of the bottom block 30 corresponding to the locating ribs 114 by stamping technology for engagement with the heat pipes 20 to enhance connection tightness between the heat pipes 20 and the bottom block 30 .
- the flat bottom abutment edge 111 of the extension abutment strip 11 of each first radiation fin 1is divided by the locating grooves 112 into multiple spacer ribs 113 .
- the heat pipes 20are press-fitted into the locating grooves 32 of the bottom block 30 and the locating grooves 112 of the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10 , the heat pipes 20 are kept in parallel in a flush manner and spaced from one another by the spacer ribs 113 , and therefore a gap D is left between each two adjacent heat pipes 20 in the area beyond the protruding block 101 of the radiation fin module 10 (see FIG. 3 ).
- spacer ribs 322are formed of the flat bottom wall of the bottom block 30 and respectively disposed between each two adjacent ones of the locating grooves 32 corresponding to the spacer ribs 113 of the extension abutment strips 11 of the first radiation fins 1 .
- FIGS. 6 and 7illustrate a heat pipe-attached heat sink in accordance with a second embodiment of the present invention.
- the height of the spacer ribs 113 a between each two adjacent ones of the locating grooves 112 of the extension abutment strips 11 of the first radiation fins 1is shorter than the depth of the locating grooves 112 .
- the heat pipes 20are kept in close contact with one another in a parallel and flush manner.
- the height of the spacer ribs 322 of the bottom block 30is smaller than the locating grooves 32 so that the heat pipes 20 can be completely kept in close contact with one another in a parallel and flush manner.
- FIGS. 8 and 9illustrate a heat pipe-attached heat sink in accordance with a third embodiment of the present invention.
- This third embodimentis substantially similar to the aforesaid first embodiment with the exception that each heat pipe 20 has a flat protruding peripheral portion 201 protruding over the flat bottom wall of the bottom block 30 at a height H; the flat bottom abutment edges 111 of the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10 protrude over the flat bottom wall of the bottom block 30 at the same height H and kept in flush with the flat protruding peripheral portions 201 of the heat pipes 20 (see FIG. 9 ).
- the flat protruding peripheral portions 201 of the heat pipes 20 and the flat bottom abutment edges 111 of the extension abutment strips 11 of the first radiation fins 1 of the radiation fin module 10constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.
- the design of the mounting holes 33 of the bottom block 30facilitates installation of a fan bracket or connection of the heat sink to a circuit substrate or selected member during application.
- the bottom block 30can be made having retaining holes for receiving the radiation fins 1 ; 1 a of the radiation fin module 10 .
- the radiation fins 1 ; 1 a of the radiation fin module 10are firmly secured to the bottom block 30 .
- FIGS. 10 and 11illustrate a heat pipe-attached heat sink in accordance with a fourth embodiment of the present invention.
- the heat pipe-attached heat sinkcomprises a bottom block 30 , a first radiation fin module 10 fastened to the bottom block 30 , a second radiation fin module 10 a spaced from the first radiation fin module 10 and the bottom block 30 at a distance, and a plurality of heat pipes 20 ; 20 a fastened with the respective heat-receiving ends thereof to the first radiation fin module 10 and the bottom block 30 and with the respective cold ends 21 a thereof to the second radiation fin module 10 a.
- FIGS. 12 and 13illustrate a heat pipe-attached heat sink in accordance with a fifth embodiment of the present invention.
- This fifth embodimentis substantially similar to the aforesaid fourth embodiment with the exception that each heat pipe 20 b has a flat protruding peripheral portion 201 b protruding over the flat bottom wall of the bottom block 30 at a height H; the flat bottom abutment edges 111 of the extension abutment strips 11 of the first radiation fins 1 of the first radiation fin module 10 protrude over the flat bottom wall of the bottom block 30 at the same height H and kept in flush with the flat protruding peripheral portions 201 b of the heat pipes 20 b .
- the flat protruding middle peripheral portions 201 b of the heat pipes 20 b and the flat bottom abutment edges 111 of the extension abutment strips 11 of the first radiation fins 1 of the first radiation fin module 10constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.
- FIGS. 14 and 15illustrate a heat pipe-attached heat sink in accordance with a sixth embodiment of the present invention.
- the heat pipe-attached heat sinkcomprises a bottom block 30 , a first radiation fin module 10 fastened to the bottom block 30 , a second radiation fin modules 10 b and a third radiation fin modules 10 c arranged at two opposite lateral sides relative to the first radiation fin module 10 and the bottom block 30 , and a plurality of heat pipes 20 c installed in the first radiation fin module 10 and the bottom block 30 and connected with the respective two opposite ends 21 c to the second radiation fin modules 10 b and the third radiation fin modules 10 c.
- FIGS. 16 and 17illustrate a heat pipe-attached heat sink in accordance with a seventh embodiment of the present invention.
- This seventh embodimentis substantially similar to the aforesaid sixth embodiment with the exception that each heat pipe 20 c has a flat protruding peripheral portion 201 c protruding over the flat bottom wall of the bottom block 30 at a height H; the flat bottom abutment edges 111 of the extension abutment strips of the radiation fins 1 of the first radiation fin module 10 protrude over the flat bottom wall of the bottom block 30 at the same height H and kept in flush with the flat protruding peripheral portions 201 c of the heat pipes 20 c .
- the flat protruding middle peripheral portions 201 c of the heat pipes 20 c and the flat bottom abutment edges 111 of the extension abutment strips 11 of the radiation fins 1 of the first radiation fin module 10constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.
- FIGS. 18 ⁇ 22illustrate a heat pipe-attached heat sink in accordance with an eighth embodiment of the present invention.
- the heat pipe-attached heat sinkcomprises a radiation fin module 10 e , a plurality of heat pipes 20 e and a bottom block 30 e.
- the radiation fin module 10 econsists of a plurality of radiation fins 1 e arranged in a stack.
- Each radiation fin 1 ecomprises an extension abutment strip 11 e .
- the extension abutment strip 11 ehas a flat bottom abutment edge 111 e and a plurality of locating grooves 112 e located on the flat bottom abutment edge 111 e .
- the flat bottom abutment edge 111 eis divided by the locating grooves 112 e into a plurality of spacer ribs 113 e .
- each radiation fin 1 eWhen the radiation fins 1 e are arranged together in a stack, the extension abutment strips 11 e of the radiation fins 1 e form a protruding block 101 e , and the locating grooves 112 e of each radiation fin 1 e are respectively kept in alignment with that of the other radiation fins 1 e .
- Each radiation fin 1 efurther comprises a plurality of through holes 115 e for the insertion of the heat pipes 20 e.
- the heat pipes 20 eare U-shaped pipes, each having its one end, namely, the heat-receiving end respectively press-fitted into the locating grooves 112 e of the radiation fin 1 e of the radiation fin module 10 e and its other end, namely, the heat-releasing end respectively and tightly inserted into the through holes 115 e of the radiation fins 1 e of the radiation fin module 10 e . Further, each heat pipe 20 e has a flat protruding peripheral portion 201 e.
- the bottom block 30 ecomprises an opening 31 e cut through opposing flat top and bottom walls thereof, a flat protrusion 301 e protruded from the flat bottom wall thereof at one or two opposite sides relative to the opening 31 e , and a plurality of locating grooves 32 e located on the flat protrusion 301 e corresponding to the locating grooves 112 e of the radiation fin 1 e of the radiation fin module 10 e .
- the flat protrusion 301 edefines a flat contact surface 302 e .
- the flat bottom abutment edge 111 e of the extension abutment strips 11 e of the radiation fin 1 e of the radiation fin module 10 e and the flat protruding peripheral portion 201 e of the heat pipes 20 eform a coplane at a relatively higher elevation than the other part of the flat peripheral surface area of each of the heat pipes 20 e.
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Abstract
Description
- (a) Field of the Invention
- The present invention relates to heat sink technology and more particularly, to a heat pipe-attached heat sink, which keeps the attached heat pipes in flush with a flat bottom abutment edge of an extension abutment strip of each radiation fin for direct contact with a heat source for quick transfer of waste head.
- (b) Description of the Prior Art
- A conventional heat pipe attached heat sink is known comprising: a radiation fin module, one of a number of heat pipes and a metal bottom block. During application, the bottom block is kept in direct contact with the heat source, enabling waste heat to be transferred by the bottom block to the radiation fins of the radiation fin module through the heat pipe(s) for quick dissipation. This design of heat sink utilizes the bottom block, the heat pipe(s) and the radiation fin module to transfer heat in proper order. However, this heat transfer method has a low heat dissipation speed and performance. There is known another prior art heat sink design, which eliminates the use of a metal bottom block and has the heat-absorbing end of each heat pipe be directly press-fitted into a respective mounting groove on each of a number of radiation fins. After connection between heat pipes and radiation fins, heat pipes are kept flattened and kept in parallel for direct contact with the heat source for quick transfer of waste heat from the heat source to the radiation fins for quick dissipation. According to this design, the radiation fins are not directly kept in contact with the surface of the heat source for direct dissipation of waste heat.
- The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a heat pipe-attached heat sink, which eliminates the drawbacks of the aforesaid various prior art designs.
- To achieve this and other objects of the present invention, a heat pipe-attached heat sink comprises a bottom block, a radiation fin module and one or a number of heat pipes. The bottom block comprises an opening cut through opposing flat top and bottom walls thereof and a plurality of locating grooves arranged on the flat bottom wall and extended to the opening. The radiation fin module is fastened to the bottom block, comprising a plurality of first radiation fins and second radiation fins arranged in a stack. Each first radiation fin comprises an extension abutment strip. The extension abutment strip comprises a flat bottom abutment edge, and a plurality of locating grooves located on the flat bottom abutment edge and dividing the flat bottom abutment edge into a plurality of spacer ribs, Further, the extension abutment strips of the first radiation fins form a protruding block that is tightly plugged into the opening of the bottom block. The heat pipes are respectively press-fitted into the locating grooves of the bottom block and the locating grooves of the extension abutment strips of the first radiation fins of the radiation fin module. Each heat pipe comprises a planar peripheral side exposed outside the radiation fin module and the bottom block for direct contact with an external heat source. Thus, the flat bottom abutment edge of the extension abutment strip of each first radiation fin, the flat bottom wall of the bottom block and the planar peripheral side of each heat pipe form a coplane for direct contact with the external heat source for quick dissipation of waste heat from the external heat source.
- Further, the extension abutment strip of each first radiation fin comprises at least one locating rib formed in each locating groove at the flat bottom abutment edge thereof for engagement with the periphery of the heat pipes. Further, the bottom block comprises at least one locating rib formed in each locating groove at the flat bottom wall thereof for engagement with the periphery of the heat pipes.
- Further, the bottom block further comprises a plurality of spacer ribs formed of the flat bottom wall thereof and respectively disposed between each two adjacent ones of the locating grooves of the bottom block corresponding to the spacer ribs of the extension abutment strips of the first radiation fins of the radiation fin module.
- Further, the spacer ribs of the first radiation fins have a height smaller than the depth of the locating grooves of the first radiation fins. Further, the spacer ribs of said bottom block have a height smaller than the depth of the locating grooves of said bottom block.
- Further, each heat pipe comprises a flat protruding peripheral portion protruding over the flat bottom wall of said bottom block; the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module protrude over the flat bottom wall of said bottom block and are kept in flush with the flat protruding peripheral portions of said heat pipes.
- Further, the bottom block comprises a plurality of mounting holes for mounting.
- Further, the bottom block can be made having a plurality of retaining holes for receiving the first radiation fins and second radiation fins of the radiation fin module tightly.
- In an alternate form of the present invention, the heat pipe-attached heat sink further comprises a second radiation fin module. In this case, the heat pipes each have one end thereof respectively extended out of the bottom block and fastened to the second radiation fin module.
- Further, the first radiation fins and second radiation fins of the radiation fin module can be made having a plurality of through holes. In this case, the heat pipes are U-shaped pipes each having one end thereof fastened to the locating grooves of the first radiation fins and the locating grooves of the bottom block and an opposite end thereof respectively and tightly press-fitted into the through holes of the first radiation fins and second radiation fins of the radiation fin module.
- In still another alternate form of the present invention, the heat pipes each have a heat-receiving end press-fitted into the locating grooves of the first radiation fins and the locating grooves of the bottom block and a flat protruding peripheral portion located on the heat-receiving end and protruding over the flat bottom wall of the bottom block at a predetermined distance.
- In still another alternate form of the present invention, the bottom block comprises a flat protrusion protruded from the flat bottom wall thereof and abutted to the opening. Further, the locating grooves of the bottom block are located on the flat protrusion. In this case, the locating grooves of the first radiation fins of the radiation fin module and the locating grooves of the bottom block are disposed at different elevations.
- Further, the flat protrusion of the bottom block defines a flat contact surface corresponding to the flat bottom abutment edges of the extension abutment strips of the first radiation fins of the radiation fin module. Further, the flat contact surface of the flat protrusion of the bottom block and the flat bottom abutment edges of the extension abutment strips of the first radiation fins of the radiation fin module are disposed at different elevations.
FIG. 1 is an exploded view of a heat pipe-attached heat sink in accordance with a first embodiment of the present invention.FIG. 2 is an elevational assembly view of the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.FIG. 3 is a top view of the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.FIG. 4 is a sectional view taken along line A-A ofFIG. 1 .FIG. 5 is an elevational view of one radiation fin for the heat pipe-attached heat sink in accordance with the first embodiment of the present invention.FIG. 6 is a top view of a heat pipe-attached heat sink in accordance with a second embodiment of the present invention.FIG. 7 is a sectional view taken along line A-A ofFIG. 6 .FIG. 8 is an elevational assembly view of a heat pipe-attached heat sink in accordance with a third embodiment of the present invention.FIG. 9 is a side view of the heat pipe-attached heat sink in accordance with the third embodiment of the present invention.FIG. 10 is an elevational view of a heat pipe-attached heat sink in accordance with a fourth embodiment of the present invention.FIG. 11 is a side view of the heat pipe-attached heat sink in accordance with the fourth embodiment of the present invention.FIG. 12 is an elevational view of a heat pipe-attached heat sink in accordance with a fifth embodiment of the present invention.FIG. 13 is a side view of the heat pipe-attached heat sink in accordance with the fifth embodiment of the present invention.FIG. 14 is an elevational view of a heat pipe-attached heat sink in accordance with a sixth embodiment of the present invention.FIG. 15 is a side view of the heat pipe-attached heat sink in accordance with the sixth embodiment of the present invention.FIG. 16 is an elevational view of a heat pipe-attached heat sink in accordance with a seventh embodiment of the present invention.FIG. 17 is a side view of the heat pipe-attached heat sink in accordance with the seventh embodiment of the present invention.FIG. 18 is an elevational view of a heat pipe-attached heat sink in accordance with an eighth embodiment of the present invention before installation of heat pipes.FIG. 19 is a side view ofFIG. 18 .FIG. 20 is a top view of the heat pipe-attached heat sink in accordance with the eighth embodiment of the present invention after installation of heat pipes.FIG. 21 is a sectional view taken along line A-A ofFIG. 29 .FIG. 22 is an elevational view of the heat pipe-attached heat sink in accordance with the eighth embodiment of the present invention after installation of heat pipes.- Referring to
FIGS. 1-4 , a heat pipe-attached heat sink in accordance with a first embodiment of the present invention is shown comprising aradiation fin module 10, at least oneheat pipes 20 and abottom block 30. - The
radiation fin module 10 consists of a plurality of first andsecond radiation fins 1;1aarranged in a stack. Eachfirst radiation fin 1 comprises anextension abutment strip 11, as shown inFIG. 5 . Theextension abutment strip 11 comprises a flatbottom abutment edge 111 and a plurality of locatinggrooves 112 located on the flatbottom abutment edge 111. The flatbottom abutment edge 111 is divided by the locatinggrooves 112 into a plurality ofspacer ribs 113. When the first andsecond radiation fins 1;1aare arranged together in a stack, the extension abutment strips11 of thefirst radiation fins 1 form aprotruding block 101, and the locatinggrooves 112 of eachfirst radiation fin 1 are respectively kept in alignment with that of the otherfirst radiation fins 1. - The
heat pipes 20 each have a planar peripheral side respectively kept in a flush manner. - The
bottom block 30 comprises anopening 31 cut through opposing flat top and bottom walls thereof, a plurality of locatinggrooves 32 arranged on the flat bottom wall at one or two opposite sides relative to theopening 31, and a plurality of mountingholes 33 cut through the flat top and bottom walls and spaced around theopening 31. - During installation, the first and
second radiation fins 1;1aare stacked up to form the designedradiation fin module 10, and then press-fit the protrudingblock 101 of theradiation fin module 10 into theopening 31 of thebottom block 30 to keep the locatinggrooves 32 in alignment with the locatinggrooves 112 of the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10, and then attach theheat pipes 20 to the flat bottom wall of thebottom block 30 and the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10 to force theheat pipes 20 into tight engagement with the locatinggrooves 32 of thebottom block 30 and the locatinggrooves 112 of the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10, keeping the planar peripheral wall of each ofheat pipes 20 and the flat bottom abutment edges111 of the extension abutment strips11 in flush with the flat bottom wall of thebottom block 30 for direct contact with the heat source to minimize impedance during heat transfer, eliminating the drawback of indirect heat transfer arrangement of the prior art design and enhancing heat transfer speed and heat dissipation performance. - As shown in
FIG. 5 , the protrudingblock 101 of theradiation fin module 10 has a cross section approximately equal to the cross dimension of theopening 31 of thebottom block 30. When press-fitting theprotruding block 101 into theopening 31 of thebottom block 30, the protrudingblock 101 fills up theopening 31, and the flat bottom abutment edges111 of the extension abutment strips11 of theradiation fin module 10 form with the planar peripheral side of each of theheat pipes 20 and the flat bottom wall of the bottom block30 a co-plane for direct contact with the heat source for quick transfer of waste heat from the heat source. - The
extension abutment strip 11 of eachfirst radiation fin 1 further comprises at least one locatingrib 114 formed in each locatinggroove 112 at the flatbottom abutment edge 111 by stamping technology (seeFIG. 5 ). When press-fitting theheat pipes 20 into the locatinggrooves 112, the locatingribs 114 are deformed and forced into engagement with the periphery of therespective heat pipes 20, enhancing connection tightness between theheat pipes 20 and theradiation fins 1. Locatingribs 321 can be formed in the locatinggrooves 32 of thebottom block 30 corresponding to the locatingribs 114 by stamping technology for engagement with theheat pipes 20 to enhance connection tightness between theheat pipes 20 and thebottom block 30. - As stated above, the flat
bottom abutment edge 111 of theextension abutment strip 11 of eachfirst radiation fin 1 is divided by the locatinggrooves 112 intomultiple spacer ribs 113. After theheat pipes 20 are press-fitted into the locatinggrooves 32 of thebottom block 30 and the locatinggrooves 112 of the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10, theheat pipes 20 are kept in parallel in a flush manner and spaced from one another by thespacer ribs 113, and therefore a gap D is left between each twoadjacent heat pipes 20 in the area beyond the protrudingblock 101 of the radiation fin module10 (seeFIG. 3 ). - Further, when making the locating
grooves 32 on the flat bottom wall of thebottom block 30,spacer ribs 322 are formed of the flat bottom wall of thebottom block 30 and respectively disposed between each two adjacent ones of the locatinggrooves 32 corresponding to thespacer ribs 113 of the extension abutment strips11 of thefirst radiation fins 1. FIGS. 6 and 7 illustrate a heat pipe-attached heat sink in accordance with a second embodiment of the present invention. According to this second embodiment, the height of thespacer ribs 113abetween each two adjacent ones of the locatinggrooves 112 of the extension abutment strips11 of thefirst radiation fins 1 is shorter than the depth of the locatinggrooves 112. After installation of theheat pipes 20 in thebottom block 30 and theradiation fin module 10, theheat pipes 20 are kept in close contact with one another in a parallel and flush manner. Further, the height of thespacer ribs 322 of thebottom block 30 is smaller than the locatinggrooves 32 so that theheat pipes 20 can be completely kept in close contact with one another in a parallel and flush manner.FIGS. 8 and 9 illustrate a heat pipe-attached heat sink in accordance with a third embodiment of the present invention. This third embodiment is substantially similar to the aforesaid first embodiment with the exception that eachheat pipe 20 has a flat protrudingperipheral portion 201 protruding over the flat bottom wall of thebottom block 30 at a height H; the flat bottom abutment edges111 of the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10 protrude over the flat bottom wall of thebottom block 30 at the same height H and kept in flush with the flat protrudingperipheral portions 201 of the heat pipes20 (seeFIG. 9 ). Thus, the flat protrudingperipheral portions 201 of theheat pipes 20 and the flat bottom abutment edges111 of the extension abutment strips11 of thefirst radiation fins 1 of theradiation fin module 10 constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.- Further, the design of the mounting
holes 33 of thebottom block 30 facilitates installation of a fan bracket or connection of the heat sink to a circuit substrate or selected member during application. - Except the aforesaid press-fit connection method to join the
radiation fins 1;1aof theradiation fin module 10 and thebottom block 30, thebottom block 30 can be made having retaining holes for receiving theradiation fins 1;1aof theradiation fin module 10. By means of plugging theradiation fins 1;1ainto the retaining holes on thebottom block 30, theradiation fins 1;1aof theradiation fin module 10 are firmly secured to thebottom block 30. FIGS. 10 and 11 illustrate a heat pipe-attached heat sink in accordance with a fourth embodiment of the present invention. According to this embodiment, the heat pipe-attached heat sink comprises abottom block 30, a firstradiation fin module 10 fastened to thebottom block 30, a secondradiation fin module 10aspaced from the firstradiation fin module 10 and thebottom block 30 at a distance, and a plurality ofheat pipes 20;20afastened with the respective heat-receiving ends thereof to the firstradiation fin module 10 and thebottom block 30 and with the respective cold ends21athereof to the secondradiation fin module 10a.FIGS. 12 and 13 illustrate a heat pipe-attached heat sink in accordance with a fifth embodiment of the present invention. This fifth embodiment is substantially similar to the aforesaid fourth embodiment with the exception that eachheat pipe 20bhas a flat protrudingperipheral portion 201bprotruding over the flat bottom wall of thebottom block 30 at a height H; the flat bottom abutment edges111 of the extension abutment strips11 of thefirst radiation fins 1 of the firstradiation fin module 10 protrude over the flat bottom wall of thebottom block 30 at the same height H and kept in flush with the flat protrudingperipheral portions 201bof theheat pipes 20b. Thus, the flat protruding middleperipheral portions 201bof theheat pipes 20band the flat bottom abutment edges111 of the extension abutment strips11 of thefirst radiation fins 1 of the firstradiation fin module 10 constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.FIGS. 14 and 15 illustrate a heat pipe-attached heat sink in accordance with a sixth embodiment of the present invention. According to this embodiment, the heat pipe-attached heat sink comprises abottom block 30, a firstradiation fin module 10 fastened to thebottom block 30, a secondradiation fin modules 10band a thirdradiation fin modules 10carranged at two opposite lateral sides relative to the firstradiation fin module 10 and thebottom block 30, and a plurality ofheat pipes 20cinstalled in the firstradiation fin module 10 and thebottom block 30 and connected with the respective two opposite ends21cto the secondradiation fin modules 10band the thirdradiation fin modules 10c.FIGS. 16 and 17 illustrate a heat pipe-attached heat sink in accordance with a seventh embodiment of the present invention. This seventh embodiment is substantially similar to the aforesaid sixth embodiment with the exception that eachheat pipe 20chas a flat protruding peripheral portion201cprotruding over the flat bottom wall of thebottom block 30 at a height H; the flat bottom abutment edges111 of the extension abutment strips of theradiation fins 1 of the firstradiation fin module 10 protrude over the flat bottom wall of thebottom block 30 at the same height H and kept in flush with the flat protruding peripheral portions201cof theheat pipes 20c. Thus, the flat protruding middle peripheral portions201cof theheat pipes 20cand the flat bottom abutment edges111 of the extension abutment strips11 of theradiation fins 1 of the firstradiation fin module 10 constitute a protruding platform for direct contact with a heat source during application, avoiding installation interference of surrounding electronic component parts.FIGS. 18˜22 illustrate a heat pipe-attached heat sink in accordance with an eighth embodiment of the present invention. According to this embodiment, the heat pipe-attached heat sink comprises aradiation fin module 10e, a plurality ofheat pipes 20eand abottom block 30e.- The
radiation fin module 10econsists of a plurality of radiation fins1earranged in a stack. Each radiation fin1ecomprises anextension abutment strip 11e. Theextension abutment strip 11ehas a flatbottom abutment edge 111eand a plurality of locatinggrooves 112elocated on the flatbottom abutment edge 111e. The flatbottom abutment edge 111eis divided by the locatinggrooves 112einto a plurality ofspacer ribs 113e. When the radiation fins1eare arranged together in a stack, the extension abutment strips11eof the radiation fins1eform a protruding block101e, and the locatinggrooves 112eof each radiation fin1eare respectively kept in alignment with that of the other radiation fins1e. Each radiation fin1efurther comprises a plurality of throughholes 115efor the insertion of theheat pipes 20e. - The
heat pipes 20eare U-shaped pipes, each having its one end, namely, the heat-receiving end respectively press-fitted into the locatinggrooves 112eof the radiation fin1eof theradiation fin module 10eand its other end, namely, the heat-releasing end respectively and tightly inserted into the throughholes 115eof the radiation fins1eof theradiation fin module 10e. Further, eachheat pipe 20ehas a flat protrudingperipheral portion 201e. - The
bottom block 30ecomprises anopening 31ecut through opposing flat top and bottom walls thereof, aflat protrusion 301eprotruded from the flat bottom wall thereof at one or two opposite sides relative to theopening 31e, and a plurality of locatinggrooves 32elocated on theflat protrusion 301ecorresponding to the locatinggrooves 112eof the radiation fin1eof theradiation fin module 10e. Theflat protrusion 301edefines aflat contact surface 302e. There is an elevation difference H1 between the locatinggrooves 32eof thebottom block 30 and the elevation of the locatinggrooves 112eof the radiation fin1eof theradiation fin module 10e, and an elevation difference H2 between theflat contact surface 302eof theflat protrusion 301eand the flatbottom abutment edge 111eof the extension abutment strips11eof the radiation fin1eof theradiation fin module 10e. Thus, the flatbottom abutment edge 111eof the extension abutment strips11eof the radiation fin1eof theradiation fin module 10eand the flat protrudingperipheral portion 201eof theheat pipes 20eform a coplane at a relatively higher elevation than the other part of the flat peripheral surface area of each of theheat pipes 20e. - Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Claims (17)
1. A heat pipe-attached heat sink, comprising:
a bottom block comprising an opening cut through opposing flat top and bottom walls thereof and a plurality of locating grooves arranged on the flat bottom wall and extended to said opening;
a radiation fin module fastened to said bottom block, said radiation fin module comprising a plurality of first radiation fins and second radiation fins arranged in a stack, each said first radiation fin comprising an extension abutment strip, said extension abutment strip comprising a flat bottom abutment edge and a plurality of locating grooves located on said flat bottom abutment edge and dividing said flat bottom abutment edge into a plurality of spacer ribs, the extension abutment strips of said first radiation fins forming a protruding block and being tightly plugged into the opening of said bottom block; and
a plurality of heat pipes respectively press-fitted into the locating grooves of said bottom block and the locating grooves of the extension abutment strips of said first radiation fins of said radiation fin module, each said heat pipe comprising a planar peripheral side exposed outside said radiation fin module and said bottom block for direct contact with an external heat source.
2. The heat pipe-attached heat sink as claimed inclaim 1 , wherein the flat bottom abutment edge of the extension abutment strip of each said first radiation fin, the flat bottom wall of said bottom block and the planar peripheral side of each said heat pipe form a coplane.
3. The heat pipe-attached heat sink as claimed inclaim 1 , wherein the extension abutment strip of each said first radiation fin further comprises at least one locating rib formed in each locating groove at the flat bottom abutment edge thereof for engagement with the periphery of said heat pipes.
4. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said bottom block further comprises at least one locating rib formed in each locating groove at the flat bottom wall thereof for engagement with the periphery of said heat pipes.
5. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said bottom block further comprises a plurality of spacer ribs formed of the flat bottom wall thereof and respectively disposed between each two adjacent ones of the locating grooves of said bottom block corresponding to the spacer ribs of the extension abutment strips of said first radiation fins of said radiation fin module.
6. The heat pipe-attached heat sink as claimed inclaim 1 , wherein the spacer ribs of said first radiation fins have a height smaller than the depth of the locating grooves of said first radiation fins.
7. The heat pipe-attached heat sink as claimed inclaim 5 , wherein the spacer ribs of said bottom block have a height smaller than the depth of the locating grooves of said bottom block.
8. The heat pipe-attached heat sink as claimed inclaim 1 , wherein each said heat pipe comprises a flat protruding peripheral portion protruding over the flat bottom wall of said bottom block; the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module protrude over the flat bottom wall of said bottom block and are kept in flush with the flat protruding peripheral portions of said heat pipes.
9. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said bottom block further comprises a plurality of mounting holes for mounting.
10. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said bottom block further comprises a plurality of retaining holes for receiving said first radiation fins and second radiation fins of said radiation fin module tightly.
11. The heat pipe-attached heat sink as claimed inclaim 1 , further comprising a second radiation fin module, wherein said heat pipes each have one end thereof respectively extended out of said bottom block and fastened to said second radiation fin module.
12. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said first radiation fins and second radiation fins of said radiation fin module each comprise a plurality of through holes; said heat pipes are U-shaped pipes each having one end thereof fastened to the locating grooves of said first radiation fins and the locating grooves of said bottom block and an opposite end thereof respectively and tightly press-fitted into the through holes of said first radiation fins and second radiation fins of said radiation fin module.
13. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said heat pipes each have a heat-receiving end press-fitted into the locating grooves of said first radiation fins and the locating grooves of said bottom block and a flat protruding peripheral portion located on said heat-receiving end and protruding over the flat bottom wall of said bottom block at a predetermined distance.
14. The heat pipe-attached heat sink as claimed inclaim 1 , wherein said bottom block comprises a flat protrusion protruded from the flat bottom wall thereof and abutted to said opening; the locating grooves of said bottom block are located on said flat protrusion.
15. The heat pipe-attached heat sink as claimed inclaim 14 , wherein the locating grooves of said first radiation fins of said radiation fin module and the locating grooves of said bottom block are disposed at different elevations.
16. The heat pipe-attached heat sink as claimed inclaim 14 , wherein said flat protrusion of said bottom block defines a flat contact surface corresponding to the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module.
17. The heat pipe-attached heat sink as claimed inclaim 16 , wherein the flat contact surface of said flat protrusion of said bottom block and the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module are disposed at different elevations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/152,234US20120305221A1 (en) | 2011-06-02 | 2011-06-02 | Heat pipe-attached heat sink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/152,234US20120305221A1 (en) | 2011-06-02 | 2011-06-02 | Heat pipe-attached heat sink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20120305221A1true US20120305221A1 (en) | 2012-12-06 |
Family
ID=47260772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/152,234AbandonedUS20120305221A1 (en) | 2011-06-02 | 2011-06-02 | Heat pipe-attached heat sink |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US20120305221A1 (en) |
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| WO2018214096A1 (en)* | 2017-05-25 | 2018-11-29 | 罗伯特·博世有限公司 | Cooling device |
| US20190254190A1 (en)* | 2018-02-13 | 2019-08-15 | Sy-Thermal Inc. | Handheld communication device and thin heat dissipating structure thereof |
| US20210392787A1 (en)* | 2018-11-01 | 2021-12-16 | Samsung Electronics Co., Ltd. | Heat dissipation structure and electronic device including same |
| US11266040B2 (en)* | 2019-05-09 | 2022-03-01 | Lenovo (Singapore) Pte Ltd | Heat transport device |
| US20230102571A1 (en)* | 2020-03-27 | 2023-03-30 | Sony Interactive Entertainment Inc. | Heat radiating device and electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |