US20140311712A1 - Corrugated radiation fin and heat sink using same - Google Patents
Corrugated radiation fin and heat sink using same Download PDFInfo
- Publication number
- US20140311712A1 US20140311712A1 US13/945,179 US201313945179A US2014311712A1 US 20140311712 A1 US20140311712 A1 US 20140311712A1 US 201313945179 A US201313945179 A US 201313945179A US 2014311712 A1 US2014311712 A1 US 2014311712A1
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- US
- United States
- Prior art keywords
- radiation fin
- corrugated
- corrugated radiation
- heat
- heat transfer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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- 230000005855 radiation Effects 0.000 title claims abstract description 123
- 230000007704 transition Effects 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 16
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- F28F1/32—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 the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
- F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/06—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4871—Bases, plates or heatsinks
- H01L21/4882—Assembly of heatsink parts
-
- 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
- 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 invention relates to heat sink technology, and more particularly to a corrugated radiation fin for heat sink, which has a large area corrugated radiation fin body that provides an extended heat dissipation surface area to enhance heat dissipation efficiency.
- the invention relates also to a heat sink using this design of corrugated radiation fins.
- Conventional heat sinks generally comprise a heat transfer block and a plurality of radiation fins. Some heat sinks have one or more heat pipes fastened to the heat transfer block thereof.
- Conventional radiation fins for heat sink are commonly made in the form of a flat sheet for dissipating heat transferred from the heat transfer block of heat pipes. The mount and total surface area of the radiation fins directly affect the overall heat dissipation efficiency of the heat sink. The larger the number of the radiation fins is, the higher the heat dissipation efficiency of the heat sink will be.
- U.S. Pat. No. 5,014,776 discloses a heat sink design, entitled “Heat emitting unit in form of a heater or cooler”.
- U.S. Pat. No. 6,758,262 discloses another heat sink design, entitled “Heat sink, method for manufacturing same, and pressing jig”.
- ribs radiatation fins
- U.S. Pat. No. 5,014,776 discloses a heat sink design, entitled “Heat emitting unit in form of a heater or cooler”.
- U.S. Pat. No. 6,758,262 discloses another heat sink design, entitled “Heat sink, method for manufacturing same, and pressing jig”.
- ribs radiatation fins
- these ribs are planar sheet members, their heat dissipation surface area is limited.
- the present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide a corrugated radiation fin for heat sink, which comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body for mounting.
- the total radiation surface area is increased and the overall heat dissipation efficiency of the radiation fin is enhanced.
- corrugated radiation fin body of the corrugated radiation fin defines a corrugated pattern that is distributed in a direction perpendicular to the plug portion.
- each corrugated radiation fin has a part formed to provide a partially deformed transition surface area between the corrugated radiation fin body and the plug portion.
- each corrugated radiation fin is configured to provide at least one heat pipe groove on the middle for accommodating at least one heat pipe, two low-level mounting edges at two opposite lateral sides relative to the at least one heat pipe groove for fastening to two bar-shaped heat transfer blocks respectively, and two angled flanges respectively disposed between the at least one heat pipe groove and the low-level mounting edges and kept in flush with the loaded at least one heat pipe and bar-shaped heat transfer blocks.
- An embodiment of the heat sink of the present invention comprises a one-piece heat transfer block defining a plurality of mounting grooves at one side thereof, and a plurality of corrugated radiation fins respectively fastened to the mounting grooves of the one-piece heat transfer block.
- Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one mounting groove of the one-piece heat transfer block.
- Another embodiment of the heat sink of the present invention comprises two bar-shaped heat transfer blocks each defining a plurality of mounting grooves at one side thereof, and a plurality of corrugated radiation fins respectively fastened to the mounting grooves of the bar-shaped heat transfer blocks.
- Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one respective mounting groove of each of the two bar-shaped heat transfer blocks.
- Still another embodiment of the heat sink of the present invention comprises a one-piece heat transfer block or two bar-shaped heat transfer blocks, a plurality of corrugated radiation fins respectively fastened to the one-piece heat transfer block or bar-shaped heat transfer blocks, and a plurality of heat pipes fastened to the corrugated radiation fins.
- Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one respective mounting groove of the one-piece heat transfer block or each bar-shaped heat transfer block, and a plurality of heat pipe grooves located at the plug portion and a plurality of through holes cut through the large area corrugated radiation fin body for securing the heat pipes.
- FIG. 1 is an elevational view of a corrugated radiation fin in accordance with the present invention.
- FIG. 2 is a top view of the corrugated radiation fin shown in FIG. 1 .
- FIG. 3 is an exploded view of a heat sink in accordance with a first embodiment of the present invention.
- FIG. 4 is a schematic sectional assembly view of the heat sink in accordance with the first embodiment of the present invention.
- FIG. 5 illustrates through holes formed on the corrugated radiation fin in accordance with the present invention.
- FIG. 6 is an oblique top elevational view of a heat sink in accordance with a second embodiment of the present invention.
- FIG. 7 is a top view of the heat sink shown in FIG. 6 .
- FIG. 8 illustrates an alternate form of the corrugated radiation fin in accordance with the present invention.
- FIG. 9 is an oblique top elevational view of a heat sink in accordance with a third embodiment of the present invention.
- FIG. 10 is a top view of the heat sink shown in FIG. 9 .
- FIG. 11 is an exploded view of a heat sink in accordance with a fourth embodiment of the present invention.
- FIG. 12 is an oblique top elevational view of the heat sink in accordance with the fourth embodiment of the present invention.
- the corrugated radiation fin 1 in accordance with the present invention for use in a head sink is shown in FIGS. 1 and 2 .
- the corrugated radiation fin 1 is a corrugated sheet member comprising a large area corrugated radiation fin body 12 formed, e.g. by stamping, a plug portion 11 located at a bottom side of the corrugated radiation fin body 12 for press-fitting into a one-piece heat transfer block 2 (see FIG. 3 ) or two bar-shaped heat transfer blocks 2 ′ (see FIG. 11 ).
- the large area of corrugated radiation fin body 12 the total radiation surface area is increased and the overall heat dissipation efficiency of the radiation fin or heat sink that uses the radiation fin is enhanced.
- the corrugated pattern of the corrugated radiation fin body 12 is distributed in a direction perpendicular to the plug portion 11 . Namely, the ridges and furrows (or grooves) of the corrugated radiation fin body 12 extend transversely to the plug portion 11 . Further, the corrugated radiation fin 1 is partially deformed by stamping to provide a partially deformed transition surface area 13 between the plug portion 11 and the corrugated radiation fin body 12 . Because corrugated pattern of the corrugated radiation fin body 12 is distributed in a direction perpendicular to the plug portion 11 , the structural strength of the corrugated radiation fin body 12 is enhanced.
- the aforesaid plug portion 11 can be variously configured for press-fitting into corresponding mounting grooves 21 .
- the bottom edge of the radiation fin is folded back and stacked up to form the plug portion 11 .
- the distal end of the plug portion can be tooled or otherwise formed to provide an L-shaped configuration.
- the heat sink comprises a plurality of corrugated radiation fins 1 and a one-piece heat transfer block 2 .
- the one-piece heat transfer block 2 comprises a plurality of mounting grooves 21 arranged in parallel on a top wall thereof.
- Each corrugated radiation fin 1 comprises a plug portion 11 disposed at a bottom side thereof, a corrugated radiation fin body 12 disposed at a top side thereof, and a transition surface area 13 between the plug portion 11 and the corrugated radiation fin body 12 .
- the plug portions 11 of the corrugated radiation fins 1 are respectively press-fitted into the mounting grooves 21 of the one-piece heat transfer block 2 . Further, these corrugated radiation fins 1 have the same size.
- the corrugated configuration of the corrugated radiation fins 1 provide extended heat dissipation surface area to enhance the overall heat dissipation efficiency of the heat sink.
- the heat sink comprises a plurality of corrugated radiation fins 1 a, a one-piece heat transfer block 2 a, and a plurality of heat pipes 3 .
- Each corrugated radiation fin 1 a comprises a plug portion 11 a disposed at a bottom side thereof, a corrugated radiation fin body 12 a disposed at a top side thereof, a transition surface area 13 a between the plug portion 11 a and the corrugated radiation fin body 12 a, and a plurality of through holes 121 a cut through the corrugated radiation fin body 12 a at selected locations.
- the one-piece heat transfer block 2 a comprises a plurality of mounting grooves 21 a arranged in parallel on a top wall thereof, and a plurality of heat pipe grooves 22 a located at a bottom wall thereof.
- the plug portions 11 a of the corrugated radiation fins 1 a are respectively press-fitted into the mounting grooves 21 a of the one-piece heat transfer block 2 a.
- the heat pipes 3 are curved pipes each having one end thereof respectively mounted in one respective mounting groove 21 a of the one-piece heat transfer block 2 a, and another end thereof respectively and tightly mounted in one respective through hole 121 a of each corrugated radiation fin 1 a.
- the aforesaid first and second embodiments are practical for use in a computer for CPU heat dissipation.
- the latter is equipped with the added heat pipes 3 .
- a heat sink in accordance with a third embodiment is shown for use in a computer for graphics card heat dissipation.
- This third embodiment is substantially similar to the aforesaid second embodiment with the exception of the configuration of the corrugated radiation fins.
- the corrugated radiation fins 1 b are wide flat shaped, each comprising a plug portion 11 b disposed at a bottom side thereof, a corrugated radiation fin body 12 b disposed at a top side thereof, a transition surface area 13 b between the plug portion 11 b and the corrugated radiation fin body 12 b, and a plurality of through holes 121 b cut through the corrugated radiation fin body 12 b at selected locations.
- the one-piece heat transfer block 2 b comprises a plurality of mounting grooves 21 b arranged in parallel on a top wall thereof, and a plurality of heat pipe grooves 22 b located at a bottom wall thereof.
- the plug portions 11 b of the corrugated radiation fins 1 b are respectively press-fitted into the mounting grooves 21 b of the one-piece heat transfer block 2 b.
- the heat pipes 3 are curved pipes each having one end thereof respectively mounted in one respective mounting groove 21 b of the one-piece heat transfer block 2 b, and another end thereof respectively and tightly mounted in one respective through hole 121 b of each corrugated radiation fin 1 b.
- the heat sink comprises a plurality of corrugated radiation fins 1 c, two bar-shaped heat transfer blocks 2 ′, and a plurality of heat pipes 3 .
- Each corrugated radiation fin 1 c comprises a plug portion 11 c disposed at one side thereof, a corrugated radiation fin body 12 c disposed at an opposite side thereof, a transition surface area 13 c between the plug portion 11 c and the corrugated radiation fin body 12 c, and a plurality of through holes 121 c cut through the corrugated radiation fin body 12 c at selected locations.
- the plug portion 11 c has its one side connected to the transition surface area 12 c, and its other side shaped to provide a plurality of heat pipe grooves 111 c located in the middle for accommodating the heat pipes 3 , two low-level mounting edges 112 c disposed at two opposite lateral sides relative to the heat pipe grooves 11 c and respectively press-fitted into one respective mounting groove 21 ′ of one respective bar-shaped heat transfer block 2 ′, and two angled flanges 113 c spaced between the heat pipe grooves 111 c and the low-level mounting edges 112 c and kept in flush with the loaded heat pipes 3 and the bar-shaped heat transfer block 2 ′ (see FIG. 12 ).
- the bar-shaped heat transfer blocks 2 ′ are kept in flush with the angled flanges 113 c of the corrugated radiation fins 1 c and the heat pipes 3 for direct contact with the surface of an external heat surface.
- the heat sink can be configured without the heat pipes 3 .
- each corrugated radiation fin 1 c can be continuously arranged together.
- the heat pipe grooves 111 c of each corrugated radiation fin 1 c can be spaced from one another at a predetermined gap.
- two heat pipe grooves 111 c are continuously arranged together.
- the two bar-shaped heat transfer blocks 2 ′, the heat pipes 3 and angled flanges 113 c of the corrugated radiation fins 1 c are kept in flush, forming a coplane.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
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- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
A heat sink includes one or two heat transfer blocks, and corrugated radiation fins fastened to the heat transfer block(s). Each corrugated radiation fin has a large area corrugated radiation fin body to provide an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one respective mounting groove of the heat transfer block(s).
Description
- (a) Field of the Invention
- The present invention relates to heat sink technology, and more particularly to a corrugated radiation fin for heat sink, which has a large area corrugated radiation fin body that provides an extended heat dissipation surface area to enhance heat dissipation efficiency. The invention relates also to a heat sink using this design of corrugated radiation fins.
- (b) Description of the Prior Art
- Conventional heat sinks generally comprise a heat transfer block and a plurality of radiation fins. Some heat sinks have one or more heat pipes fastened to the heat transfer block thereof. Conventional radiation fins for heat sink are commonly made in the form of a flat sheet for dissipating heat transferred from the heat transfer block of heat pipes. The mount and total surface area of the radiation fins directly affect the overall heat dissipation efficiency of the heat sink. The larger the number of the radiation fins is, the higher the heat dissipation efficiency of the heat sink will be.
- U.S. Pat. No. 5,014,776 discloses a heat sink design, entitled “Heat emitting unit in form of a heater or cooler”. U.S. Pat. No. 6,758,262 discloses another heat sink design, entitled “Heat sink, method for manufacturing same, and pressing jig”. According to these prior art designs, ribs (radiation fins) are inserted into channels of a heat transfer block and are pressed into place through deformation of intermediary ridges. However, because these ribs (radiation fins) are planar sheet members, their heat dissipation surface area is limited.
- The present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide a corrugated radiation fin for heat sink, which comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body for mounting.
- By using the large area of corrugated radiation fin body the total radiation surface area is increased and the overall heat dissipation efficiency of the radiation fin is enhanced.
- Further, the corrugated radiation fin body of the corrugated radiation fin defines a corrugated pattern that is distributed in a direction perpendicular to the plug portion.
- Further, each corrugated radiation fin has a part formed to provide a partially deformed transition surface area between the corrugated radiation fin body and the plug portion.
- Further, the plug portion of each corrugated radiation fin is configured to provide at least one heat pipe groove on the middle for accommodating at least one heat pipe, two low-level mounting edges at two opposite lateral sides relative to the at least one heat pipe groove for fastening to two bar-shaped heat transfer blocks respectively, and two angled flanges respectively disposed between the at least one heat pipe groove and the low-level mounting edges and kept in flush with the loaded at least one heat pipe and bar-shaped heat transfer blocks.
- An embodiment of the heat sink of the present invention comprises a one-piece heat transfer block defining a plurality of mounting grooves at one side thereof, and a plurality of corrugated radiation fins respectively fastened to the mounting grooves of the one-piece heat transfer block. Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one mounting groove of the one-piece heat transfer block.
- Another embodiment of the heat sink of the present invention comprises two bar-shaped heat transfer blocks each defining a plurality of mounting grooves at one side thereof, and a plurality of corrugated radiation fins respectively fastened to the mounting grooves of the bar-shaped heat transfer blocks. Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, and a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one respective mounting groove of each of the two bar-shaped heat transfer blocks.
- Still another embodiment of the heat sink of the present invention comprises a one-piece heat transfer block or two bar-shaped heat transfer blocks, a plurality of corrugated radiation fins respectively fastened to the one-piece heat transfer block or bar-shaped heat transfer blocks, and a plurality of heat pipes fastened to the corrugated radiation fins. Each corrugated radiation fin comprises a large area corrugated radiation fin body that provides an extended heat dissipation surface area, a plug portion located at the bottom side of the large area corrugated radiation fin body and press-fitted into one respective mounting groove of the one-piece heat transfer block or each bar-shaped heat transfer block, and a plurality of heat pipe grooves located at the plug portion and a plurality of through holes cut through the large area corrugated radiation fin body for securing the heat pipes.
-
FIG. 1 is an elevational view of a corrugated radiation fin in accordance with the present invention. -
FIG. 2 is a top view of the corrugated radiation fin shown inFIG. 1 . -
FIG. 3 is an exploded view of a heat sink in accordance with a first embodiment of the present invention. -
FIG. 4 is a schematic sectional assembly view of the heat sink in accordance with the first embodiment of the present invention. -
FIG. 5 illustrates through holes formed on the corrugated radiation fin in accordance with the present invention. -
FIG. 6 is an oblique top elevational view of a heat sink in accordance with a second embodiment of the present invention. -
FIG. 7 is a top view of the heat sink shown inFIG. 6 . -
FIG. 8 illustrates an alternate form of the corrugated radiation fin in accordance with the present invention. -
FIG. 9 is an oblique top elevational view of a heat sink in accordance with a third embodiment of the present invention. -
FIG. 10 is a top view of the heat sink shown inFIG. 9 . -
FIG. 11 is an exploded view of a heat sink in accordance with a fourth embodiment of the present invention. -
FIG. 12 is an oblique top elevational view of the heat sink in accordance with the fourth embodiment of the present invention. - The
corrugated radiation fin 1 in accordance with the present invention for use in a head sink is shown inFIGS. 1 and 2 . Thecorrugated radiation fin 1 is a corrugated sheet member comprising a large area corrugatedradiation fin body 12 formed, e.g. by stamping, aplug portion 11 located at a bottom side of the corrugatedradiation fin body 12 for press-fitting into a one-piece heat transfer block 2 (seeFIG. 3 ) or two bar-shapedheat transfer blocks 2′ (seeFIG. 11 ). By using the large area of corrugatedradiation fin body 12, the total radiation surface area is increased and the overall heat dissipation efficiency of the radiation fin or heat sink that uses the radiation fin is enhanced. - The corrugated pattern of the corrugated
radiation fin body 12 is distributed in a direction perpendicular to theplug portion 11. Namely, the ridges and furrows (or grooves) of the corrugatedradiation fin body 12 extend transversely to theplug portion 11. Further, thecorrugated radiation fin 1 is partially deformed by stamping to provide a partially deformedtransition surface area 13 between theplug portion 11 and the corrugatedradiation fin body 12. Because corrugated pattern of the corrugatedradiation fin body 12 is distributed in a direction perpendicular to theplug portion 11, the structural strength of the corrugatedradiation fin body 12 is enhanced. - Further, the
aforesaid plug portion 11 can be variously configured for press-fitting intocorresponding mounting grooves 21. In the embodiment shown inFIG. 1 , the bottom edge of the radiation fin is folded back and stacked up to form theplug portion 11. Alternatively, the distal end of the plug portion can be tooled or otherwise formed to provide an L-shaped configuration. - Referring to
FIGS. 3 and 4 , a heat sink in accordance with a first embodiment of the present invention is shown. As illustrated, the heat sink comprises a plurality ofcorrugated radiation fins 1 and a one-pieceheat transfer block 2. The one-pieceheat transfer block 2 comprises a plurality ofmounting grooves 21 arranged in parallel on a top wall thereof. Eachcorrugated radiation fin 1 comprises aplug portion 11 disposed at a bottom side thereof, a corrugatedradiation fin body 12 disposed at a top side thereof, and atransition surface area 13 between theplug portion 11 and the corrugatedradiation fin body 12. Theplug portions 11 of thecorrugated radiation fins 1 are respectively press-fitted into themounting grooves 21 of the one-pieceheat transfer block 2. Further, thesecorrugated radiation fins 1 have the same size. The corrugated configuration of thecorrugated radiation fins 1 provide extended heat dissipation surface area to enhance the overall heat dissipation efficiency of the heat sink. - Referring to
FIGS. 5-7 , a heat sink in accordance with a second embodiment of the present invention is shown. As illustrated, the heat sink comprises a plurality of corrugated radiation fins 1 a, a one-pieceheat transfer block 2 a, and a plurality ofheat pipes 3. Each corrugated radiation fin 1 a comprises aplug portion 11 a disposed at a bottom side thereof, a corrugatedradiation fin body 12 a disposed at a top side thereof, atransition surface area 13 a between theplug portion 11 a and the corrugatedradiation fin body 12 a, and a plurality of throughholes 121 a cut through the corrugatedradiation fin body 12 a at selected locations. The one-pieceheat transfer block 2 a comprises a plurality ofmounting grooves 21 a arranged in parallel on a top wall thereof, and a plurality ofheat pipe grooves 22 a located at a bottom wall thereof. Theplug portions 11 a of the corrugated radiation fins 1 a are respectively press-fitted into themounting grooves 21 a of the one-pieceheat transfer block 2 a. Theheat pipes 3 are curved pipes each having one end thereof respectively mounted in one respective mountinggroove 21 a of the one-pieceheat transfer block 2 a, and another end thereof respectively and tightly mounted in one respective throughhole 121 a of each corrugated radiation fin 1 a. - The aforesaid first and second embodiments are practical for use in a computer for CPU heat dissipation. The latter is equipped with the added
heat pipes 3. - Referring to
FIGS. 8-10 , a heat sink in accordance with a third embodiment is shown for use in a computer for graphics card heat dissipation. This third embodiment is substantially similar to the aforesaid second embodiment with the exception of the configuration of the corrugated radiation fins. As illustrated, thecorrugated radiation fins 1 b are wide flat shaped, each comprising aplug portion 11 b disposed at a bottom side thereof, a corrugatedradiation fin body 12 b disposed at a top side thereof, atransition surface area 13 b between theplug portion 11 b and the corrugatedradiation fin body 12 b, and a plurality of throughholes 121 b cut through the corrugatedradiation fin body 12 b at selected locations. The one-pieceheat transfer block 2 b comprises a plurality of mountinggrooves 21 b arranged in parallel on a top wall thereof, and a plurality ofheat pipe grooves 22 b located at a bottom wall thereof. Theplug portions 11 b of thecorrugated radiation fins 1 b are respectively press-fitted into the mountinggrooves 21 b of the one-pieceheat transfer block 2 b. Theheat pipes 3 are curved pipes each having one end thereof respectively mounted in one respective mountinggroove 21 b of the one-pieceheat transfer block 2 b, and another end thereof respectively and tightly mounted in one respective throughhole 121 b of eachcorrugated radiation fin 1 b. - Referring to
FIGS. 11 and 12 , a heat sink in accordance with a fourth embodiment of the present invention is shown. As illustrated, the heat sink comprises a plurality ofcorrugated radiation fins 1 c, two bar-shaped heat transfer blocks 2′, and a plurality ofheat pipes 3. Eachcorrugated radiation fin 1 c comprises aplug portion 11 c disposed at one side thereof, a corrugatedradiation fin body 12 c disposed at an opposite side thereof, atransition surface area 13 c between theplug portion 11 c and the corrugatedradiation fin body 12 c, and a plurality of throughholes 121 c cut through the corrugatedradiation fin body 12 c at selected locations. Further, theplug portion 11 c has its one side connected to thetransition surface area 12 c, and its other side shaped to provide a plurality ofheat pipe grooves 111 c located in the middle for accommodating theheat pipes 3, two low-level mounting edges 112 c disposed at two opposite lateral sides relative to theheat pipe grooves 11 c and respectively press-fitted into one respective mountinggroove 21′ of one respective bar-shapedheat transfer block 2′, and twoangled flanges 113 c spaced between theheat pipe grooves 111 c and the low-level mounting edges 112 c and kept in flush with the loadedheat pipes 3 and the bar-shapedheat transfer block 2′ (seeFIG. 12 ). After installation of theheat pipes 3 in the throughholes 121 c andheat pipe grooves 111 c of thecorrugated radiation fins 1 c, the bar-shaped heat transfer blocks 2′ are kept in flush with theangled flanges 113 c of thecorrugated radiation fins 1 c and theheat pipes 3 for direct contact with the surface of an external heat surface. Further, the heat sink can be configured without theheat pipes 3. - Further, the
heat pipe grooves 111 c of eachcorrugated radiation fin 1 c can be continuously arranged together. Alternatively, theheat pipe grooves 111 c of eachcorrugated radiation fin 1 c can be spaced from one another at a predetermined gap. In the example shown inFIG. 4 , twoheat pipe grooves 111 c are continuously arranged together. Thus, after installation of the twomating heat pipes 3, the twoheat pipes 3 are kept abutted against each other without any gap therebetween (seeFIG. 12 ). If the twoheat pipe grooves 111 c are kept apart, a plane will be formed between the twoheat pipes 3. - After the heat sink is assembled, the two bar-shaped heat transfer blocks 2′, the
heat pipes 3 andangled flanges 113 c of thecorrugated radiation fins 1 c are kept in flush, forming a coplane. - 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 (11)
1. A corrugated radiation fin, comprising a corrugated radiation fin body with a shape of corrugated sheet, and a plug portion located at a bottom side of said corrugated radiation fin body for mounting, said corrugated radiation fin body defining a corrugated pattern distributed in a direction perpendicular to said plug portion.
2. The corrugated radiation fin as claimed in claim 1 , further comprising a transition surface area connected between said corrugated radiation fin body and said plug portion.
3. The corrugated radiation fin as claimed in claim 1 , wherein said plug portion has a bottom edge that is folded back and stacked up.
4. The corrugated radiation fin as claimed in claim 1 , wherein said plug portion is formed to provide at least one heat pipe groove for accommodating at least one heat pipe, two low-level mounting edges at two opposite lateral sides relative to said at least one heat pipe groove, and an angled flange disposed between said at least one heat pipe groove and each said low-level mounting edge.
5. A heat sink, comprising:
a one-piece heat transfer block comprising a plurality of mounting grooves located at one side thereof; and
a plurality of corrugated radiation fins respectively fastened to said mounting grooves of said one-piece heat transfer block, each said corrugated radiation fin comprising a corrugated radiation fin body with a shape of corrugated sheet and a plug portion located at a bottom side of said corrugated radiation fin body and press-fitted into one said mounting groove of said one-piece heat transfer block, said corrugated radiation fin body defining a corrugated pattern distributed in a direction perpendicular to said plug portion.
6. A heat sink, comprising:
a one-piece heat transfer block comprising a plurality of mounting grooves located at one side thereof and a plurality of heat pipe grooves located at an opposite side thereof;
a plurality of corrugated radiation fins respectively fastened to said mounting grooves of said one-piece heat transfer block, each said corrugated radiation fin comprising a corrugated radiation fin body with a shape of corrugated sheet, a plug portion located at a bottom side of said corrugated radiation fin body and press-fitted into one said mounting groove of said one-piece heat transfer block and a plurality of through holes cut through said corrugated radiation fin body, said corrugated radiation fin body defining a corrugated pattern distributed in a direction perpendicular to said plug portion; and
a plurality of heat pipes, each said heat pipe having one end mounted in one respective said heat pipe groove of said one-piece heat transfer block and another end tightly fastened to one respective said through hole of said corrugated radiation fin.
7. A heat sink, comprising:
two bar-shaped heat transfer blocks, each said bar-shaped heat transfer block comprising a plurality of mounting grooves located at one side thereof;
a plurality of corrugated radiation fins respectively fastened to said mounting grooves of said bar-shaped heat transfer blocks, each said corrugated radiation fin comprising a corrugated radiation fin body with a shape of corrugated sheet, a plug portion located at a bottom side of said corrugated radiation fin body and press-fitted into one said mounting groove of each said bar-shaped heat transfer block and a plurality of through holes cut through said corrugated radiation fin body, said corrugated radiation fin body defining a corrugated pattern distributed in a direction perpendicular to said plug portion, said plug portion defining a plurality of heat pipe grooves in a middle part thereof and two low-level mounting edges disposed at two opposite lateral sides relative to said heat pipe grooves and respectively press-fitted into one respective mounting groove of each said bar-shaped heat transfer block; and
a plurality of heat pipes respectively mounted in said heat pipe grooves of said corrugated radiation fins and kept in flush with said bar-shaped heat transfer blocks.
8. The heat sink as claimed in claim 7 , wherein each said corrugated radiation fin comprises a plurality of through holes cut through said radiation fin body; each said heat pipe has one end mounted in one respective said heat pipe groove of said corrugated radiation fin and another end tightly fastened to one respective said through hole of said corrugated radiation fin.
9. The heat sink as claimed in claim 7 , wherein each said corrugated radiation fin further comprises two angled flanges respectively extending from said plug portion between said heat pipe grooves and said low-level mounting edges and kept in flush with said heat pipes and said bar-shaped heat transfer blocks.
10. The heat sink as claimed in claim 7 , wherein said heat pipe grooves of each said corrugated radiation fin abut against one another.
11. The heat sink as claimed in claim 7 , wherein said heat pipe grooves of each said corrugated radiation fin are spaced from one another at a predetermined gap.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310142333.3A CN103234378B (en) | 2013-04-23 | 2013-04-23 | Waveform radiating fin and radiator thereof |
CN201310142333.3 | 2013-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140311712A1 true US20140311712A1 (en) | 2014-10-23 |
Family
ID=48882430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/945,179 Abandoned US20140311712A1 (en) | 2013-04-23 | 2013-07-18 | Corrugated radiation fin and heat sink using same |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140311712A1 (en) |
JP (1) | JP3186624U (en) |
KR (1) | KR20140005621U (en) |
CN (1) | CN103234378B (en) |
DE (1) | DE202013103297U1 (en) |
TW (2) | TW201442611A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210114082A1 (en) * | 2019-10-21 | 2021-04-22 | Huizhou Hanxu Hardware & Plastic Technology Co., Ltd. | Double-sided expanded plate riveting structure and method |
EP3813098A1 (en) * | 2019-10-25 | 2021-04-28 | ABB Schweiz AG | Vapor chamber |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104089518B (en) * | 2014-08-01 | 2016-04-06 | 兰州交通大学 | Elliptical tube fin-tube type heat exchanger is streamlined waits wave amplitude circular arc corrugated fin |
DE102015104046A1 (en) | 2015-03-18 | 2016-09-22 | R. Stahl Schaltgeräte GmbH | Cooling device with a heat pipe and method of manufacturing the cooling device |
CN106231861B (en) * | 2016-07-27 | 2018-08-31 | 北京航空航天大学 | A kind of undaform radiating fin |
CN109341374B (en) * | 2018-11-14 | 2024-04-09 | 苏州永腾电子制品有限公司 | High-efficiency radiator |
JP1642782S (en) | 2018-12-28 | 2021-09-27 | ||
DE102019108435A1 (en) * | 2019-04-01 | 2020-10-15 | Borgwarner Ludwigsburg Gmbh | Heater with peeled-off fins and method of making a heating rod |
CN110553532A (en) * | 2019-09-27 | 2019-12-10 | 惠州汉旭五金塑胶科技有限公司 | Double-sided blown-up plate riveting structure and method |
US10998253B1 (en) * | 2019-12-23 | 2021-05-04 | Google Llc | Fluid diverting heat sink |
JP7329775B2 (en) * | 2019-12-23 | 2023-08-21 | パナソニックIpマネジメント株式会社 | LASER DEVICE MANUFACTURING METHOD AND FIN BLOCK MANUFACTURING METHOD |
CN112283794B (en) * | 2020-10-28 | 2023-12-12 | 青岛海信日立空调系统有限公司 | Indoor air conditioner and fin production method |
KR102453638B1 (en) * | 2022-01-20 | 2022-10-11 | 김정호 | Apparatus for heating of reclamation type) |
CN115468337B (en) * | 2022-09-26 | 2023-10-10 | 深圳见炬科技有限公司 | Condenser for high-dimensional heat radiation system |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020007935A1 (en) * | 2000-04-19 | 2002-01-24 | Thermal Form & Function Llc | Cold plate utilizing fin with evaporating refrigerant |
US6590770B1 (en) * | 2002-03-14 | 2003-07-08 | Modine Manufacturing Company | Serpentine, slit fin heat sink device |
US20050252639A1 (en) * | 2004-05-14 | 2005-11-17 | Hung-Yi Lin | Radiation fin having an airflow guiding front edge |
US20060145336A1 (en) * | 2005-01-03 | 2006-07-06 | Yuh-Cheng Chemical Ltd. | Heat sink |
US7077188B2 (en) * | 2004-09-27 | 2006-07-18 | Shyh-Ming Chen | Heat dissipating device with heat conductive tubes |
US20080060793A1 (en) * | 2006-09-08 | 2008-03-13 | Tsung-Hsien Huang | Cooler device |
US7394656B1 (en) * | 2006-12-09 | 2008-07-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Heat dissipation device |
US20090025909A1 (en) * | 2007-07-25 | 2009-01-29 | Tsung-Hsien Huang | Cooler module |
US20090178787A1 (en) * | 2008-01-11 | 2009-07-16 | Tsung-Hsien Huang | Cooler module without base panel |
US20090194255A1 (en) * | 2008-02-04 | 2009-08-06 | Tsung-Hsien Huang | Cooler device |
US20100000716A1 (en) * | 2008-07-04 | 2010-01-07 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Heat dissipation device having a clip |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3814145C2 (en) | 1988-04-27 | 1998-07-23 | Hess Joachim | Device for supplying or removing heat |
JP3552047B2 (en) | 2000-10-25 | 2004-08-11 | 古河電気工業株式会社 | Heat sink, manufacturing method thereof, and pressing jig |
JP2004071602A (en) * | 2002-08-01 | 2004-03-04 | Showa Denko Kk | Heat sink and its manufacturing method |
CN1492499A (en) * | 2002-10-24 | 2004-04-28 | 吴春福 | Radiator and its producing method |
US7036566B1 (en) * | 2005-10-06 | 2006-05-02 | Tsung-Hsien Huang | Heat dissipating module |
CN102538558B (en) * | 2012-02-10 | 2013-07-24 | 东莞汉旭五金塑胶科技有限公司 | Radiator of punch combined radiating fins |
CN203364644U (en) * | 2013-04-23 | 2013-12-25 | 东莞汉旭五金塑胶科技有限公司 | Waved heat radiation fins and radiator comprising same |
-
2013
- 2013-04-23 CN CN201310142333.3A patent/CN103234378B/en active Active
- 2013-07-09 TW TW102124503A patent/TW201442611A/en unknown
- 2013-07-09 TW TW102212928U patent/TWM465560U/en not_active IP Right Cessation
- 2013-07-18 US US13/945,179 patent/US20140311712A1/en not_active Abandoned
- 2013-07-23 DE DE202013103297U patent/DE202013103297U1/en not_active Expired - Lifetime
- 2013-07-30 KR KR2020130006327U patent/KR20140005621U/en not_active Application Discontinuation
- 2013-08-05 JP JP2013004510U patent/JP3186624U/en not_active Expired - Fee Related
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020007935A1 (en) * | 2000-04-19 | 2002-01-24 | Thermal Form & Function Llc | Cold plate utilizing fin with evaporating refrigerant |
US6590770B1 (en) * | 2002-03-14 | 2003-07-08 | Modine Manufacturing Company | Serpentine, slit fin heat sink device |
US20050252639A1 (en) * | 2004-05-14 | 2005-11-17 | Hung-Yi Lin | Radiation fin having an airflow guiding front edge |
US7077188B2 (en) * | 2004-09-27 | 2006-07-18 | Shyh-Ming Chen | Heat dissipating device with heat conductive tubes |
US20060145336A1 (en) * | 2005-01-03 | 2006-07-06 | Yuh-Cheng Chemical Ltd. | Heat sink |
US20080060793A1 (en) * | 2006-09-08 | 2008-03-13 | Tsung-Hsien Huang | Cooler device |
US7394656B1 (en) * | 2006-12-09 | 2008-07-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Heat dissipation device |
US20090025909A1 (en) * | 2007-07-25 | 2009-01-29 | Tsung-Hsien Huang | Cooler module |
US20090178787A1 (en) * | 2008-01-11 | 2009-07-16 | Tsung-Hsien Huang | Cooler module without base panel |
US20090194255A1 (en) * | 2008-02-04 | 2009-08-06 | Tsung-Hsien Huang | Cooler device |
US20100000716A1 (en) * | 2008-07-04 | 2010-01-07 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Heat dissipation device having a clip |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210114082A1 (en) * | 2019-10-21 | 2021-04-22 | Huizhou Hanxu Hardware & Plastic Technology Co., Ltd. | Double-sided expanded plate riveting structure and method |
US11786959B2 (en) * | 2019-10-21 | 2023-10-17 | Huizhou Hanxu Hardware & Plastic Technology Co., Ltd. | Double-sided expanded plate riveting structure and method |
EP3813098A1 (en) * | 2019-10-25 | 2021-04-28 | ABB Schweiz AG | Vapor chamber |
Also Published As
Publication number | Publication date |
---|---|
JP3186624U (en) | 2013-10-17 |
TW201442611A (en) | 2014-11-01 |
TWM465560U (en) | 2013-11-11 |
CN103234378A (en) | 2013-08-07 |
KR20140005621U (en) | 2014-10-31 |
DE202013103297U1 (en) | 2013-09-10 |
CN103234378B (en) | 2015-09-30 |
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