GB2286663A - Heat sink block - Google Patents

Heat sink block Download PDF

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Publication number
GB2286663A
GB2286663A GB9500593A GB9500593A GB2286663A GB 2286663 A GB2286663 A GB 2286663A GB 9500593 A GB9500593 A GB 9500593A GB 9500593 A GB9500593 A GB 9500593A GB 2286663 A GB2286663 A GB 2286663A
Authority
GB
United Kingdom
Prior art keywords
heat sink
corrugated
plates
bottom plates
fan
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.)
Granted
Application number
GB9500593A
Other versions
GB9500593D0 (en
GB2286663B (en
Inventor
Peter Mark Law
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Marston Ltd
Original Assignee
Denso Marston Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Marston Ltd filed Critical Denso Marston Ltd
Publication of GB9500593D0 publication Critical patent/GB9500593D0/en
Publication of GB2286663A publication Critical patent/GB2286663A/en
Application granted granted Critical
Publication of GB2286663B publication Critical patent/GB2286663B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • H—ELECTRICITY
    • 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

Landscapes

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

Abstract

A heat sink, e.g. for electrical components, is formed as a block, with top and bottom plates 2, 3 sandwiching corrugated layers 6 seperated by plates 7, which is brazed or bonded together so as to be able to mount a device, (e.g. fan 9 fixed to plates 2, 3), which plates may also mount the electrical components. The plates 2, 3 secure side walls 5 in grooves, and may be extruded, and the corrugations may be pressed or rolled. <IMAGE>

Description

Heat Sink Block The present invention relates to heat sink blocks and more particularly but not exclusively to heat sink blocks used in association with a fan.
Heat sinks are used to take and expire heat energy generated by electrical or similar components. They are normally formed of metal and tend to have a large surface area relative to their size in order that heat can be removed by convection and radiation.
There is a requirement with some high heat energy generators to provide a heat sink block in order to provide the necessary surface area and provide a structure upon which a fan can be accommodated to give forced convection.
Previously heat sink blocks have been formed of extruded components which are inter-locking to form the block. The fan is secured at one end of the block and arranged to push or draw air through the block. The heat generating component is secured to an external surface of the block.
These extruded blocks have tended to be bulky and there is a limit to the surface area that can be achieved by extruding components.
In accordance with the present invention there is provided a heat sink comprising top and bottom plates arranged to sandwich corrugated layers formed from corrugated sections separated by separator plates, the whole heat sink being bonded or brazed together to provide a substantially rigid structure capable of allowing a fan or similar device to be mounted to it.
Preferably, the heat sink has side or skirt walls to contain the corrugated layers and/or improve heat sink structural integrity and/or locate and secure the top and bottom plates. The top and bottom plates may have grooves to accommodate the side walls.
The heat sink may be brazed or bonded integrally or formed of several modular corrugated layers held between the top and bottom plates.
In accordance with the present invention there is also provided a method of manufacturing a heat sink comprising: (1) bonding or brazing corrugated sections to at least one separator plate; (2) locating said corrugated sections between a top plate and a bottom plate; (3) securing said corrugated section between said top plate and said bottom plate.
Side walls may be added to add structural strength to the heat sink.
An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawing in which a heat sink block is illustrated in schematic perspective.
A block heat sink 1 is shown in, the drawing. This heat sink 1 has a top plate 2 and a bottom plate 3 arranged to sandwich corrugated layers 4. In order to contain these layers 4 it is convenient to have side or curtain walls 5. The whole heat sink 1 makes a relatively resilient structure and heat generator components may be secured to either the top plate 2 or bottom plate 3.
Each corrugated layer 4 comprises a corrugation 6 and a separator plate 7. Typically, the corrugated layer 6 is made by crimping a thin layer of aluminium and may be simple folds or include vents to facilitate turbulence and so enhanced convection heat loss.
It is most convenient to braze each corrugated layer 6 to at least one separator plate. However, it is also possible provided reasonable precautions are taken to avoid blockage to use adhesives. Furthermore, it is possible to braze corrugated layers into modular units and then assemble each heat sink from those units.
Alternatively, the corrugated layers and separator plates 7 may be stacked in the top plate 2, bottom plate 3 and side walls 5 and brazed in-site. Typically, vacuum brazing or soft dip brazing techniques may be used.
The top plate 2 and bottom plate 3 have grooves 8 in order to locate and secure the side walls 5. These grooves 8 ensure the heat sink block 1 is substantially rigid. It will be understood in some embodiments other approaches may be taken including arranging the plates 2, 3 to be secured in slots in the side walls 5 if positioned outside the heat sink 1.
Generally, air will be drawn or forced through the heat sink 1 by a fan (9) whose housing is shown as a box defined by broken lines in the drawing. This fan 9 is fixed to the heat sink 1 normally through the plates 2, 3.
In use, a heat generating device is secured to either the top plate 2 or bottom plate 3. The heat generated is conducted and so spread through the whole heat sink 1. Thus, air passing through the corrugated layers 4 in particular is heated and so discipated to the environment.
Typically, the heat sink is formed of a metal such as aluminium although other materials including plastics material may be used. It is the materials heat conduction and bonding characteristics that are important.

Claims (7)

CLAIMS:
1. A heat sink comprising top and bottom plates arranged to sandwich corrugated layers formed from corrugated sections separated by separator plates, the whole heat sink being bonded or brazed together to provide a substantially rigid structure capable of allowing a fan or similar device to be mounted to it.
2. A heat sink as claimed in Claim 1 in which the heat sink has side or skirt walls which contain the corrugated layers, said side or skirt walls being secured to the top and bottom plates.
3. A heat sink as claimed in Claim 2 in which the top and bottom plates have grooves to accommodate the side or skirt walls.
4. A heat sink as claimed in any of the preceding claims in which the top and bottom plates are comprised of extrusions whilst the sandwich of corrugated layers is comprised of pressed or rolled sections.
5. A heat sink as claimed in any preceding claim in which each corrugated layer is brazed to at least one separate plate.
6. A heat sink as claimed in any of claims 1 to 4 in which each corrugated layer is bonded to at least one separator plate by an adhesive substance.
7. A heat sink as claimed in any preceding claim in which a fan housing is fixed to top and bottom plates.
GB9500593A 1994-01-12 1995-01-12 Heat sink block Expired - Fee Related GB2286663B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9400465A GB9400465D0 (en) 1994-01-12 1994-01-12 Heat sink block

Publications (3)

Publication Number Publication Date
GB9500593D0 GB9500593D0 (en) 1995-03-01
GB2286663A true GB2286663A (en) 1995-08-23
GB2286663B GB2286663B (en) 1997-09-10

Family

ID=10748667

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9400465A Pending GB9400465D0 (en) 1994-01-12 1994-01-12 Heat sink block
GB9500593A Expired - Fee Related GB2286663B (en) 1994-01-12 1995-01-12 Heat sink block

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9400465A Pending GB9400465D0 (en) 1994-01-12 1994-01-12 Heat sink block

Country Status (1)

Country Link
GB (2) GB9400465D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316804A (en) * 1996-08-28 1998-03-04 Hewlett Packard Co A high aspect ratio heat sink

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365665A (en) * 1978-11-17 1982-12-28 Sumitomo Precision Products Company, Ltd. Heat sink
US4926935A (en) * 1989-03-06 1990-05-22 Robinson Fin Machines, Inc. Compressed fin heat sink
GB2270862A (en) * 1992-09-24 1994-03-30 Imi Marston Ltd Heat sink manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365665A (en) * 1978-11-17 1982-12-28 Sumitomo Precision Products Company, Ltd. Heat sink
US4926935A (en) * 1989-03-06 1990-05-22 Robinson Fin Machines, Inc. Compressed fin heat sink
GB2270862A (en) * 1992-09-24 1994-03-30 Imi Marston Ltd Heat sink manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316804A (en) * 1996-08-28 1998-03-04 Hewlett Packard Co A high aspect ratio heat sink

Also Published As

Publication number Publication date
GB9400465D0 (en) 1994-03-09
GB9500593D0 (en) 1995-03-01
GB2286663B (en) 1997-09-10

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Legal Events

Date Code Title Description
711H Case decided by the comptr. ** correction allowed (sect. 117/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20130112