WO2004001845A1 - 回転式ヒートシンク - Google Patents
回転式ヒートシンク Download PDFInfo
- Publication number
- WO2004001845A1 WO2004001845A1 PCT/JP2002/006186 JP0206186W WO2004001845A1 WO 2004001845 A1 WO2004001845 A1 WO 2004001845A1 JP 0206186 W JP0206186 W JP 0206186W WO 2004001845 A1 WO2004001845 A1 WO 2004001845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat sink
- heat
- sink body
- heat radiating
- rotary
- Prior art date
Links
Classifications
-
- 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
Definitions
- the present invention relates to a rotary heat sink for dissipating heat generated by a heating element of an electronic device.
- the semiconductor elements that make up the CPU generate a lot of heat.
- a heat sink is attached to the semiconductor device to cool it. Fins are provided in the heat sink to promote heat dissipation from the heat sink. Furthermore, a fan is provided on the heat sink, and the heat transferred from the semiconductor device to the heat sink is radiated by forced air cooling.
- An object of the present invention is to provide a rotary heat sink that can reduce noise and has a relatively small volume.
- a heat sink according to the present invention includes a heat sink body that receives heat from a heating element, and a heat sink that is rotatably attached to the heat sink body. And a driving means for rotating the heat radiating portion with respect to the heat sink body.
- the heat sink body is disposed in contact with a heating element such as a semiconductor element, and receives heat from the heating element. Heat from the heat sink body is transferred to the heat dissipating part and dissipated to the surrounding air.
- the heat dissipating part is rotatably mounted on the heat sink body, and creates a flow of air around it while the heat dissipating part rotates. Therefore, the heat radiating portion always comes into contact with the surrounding air having a low temperature, and a high heat radiating effect can be achieved.
- This rotary heat sink can reduce the overall volume compared to a conventional cooling device including a heat sink plate provided with fins and a fan disposed thereon, High cooling efficiency can be obtained with a low rotational speed of the part.
- FIG. 1 is a sectional view showing a rotary heat sink according to one embodiment of the present invention.
- FIG. 2 is a plan view of the rotary heat sink in FIG.
- FIG. 3 is a diagram for explaining the operation of the heat radiating wings of the rotary heat sink shown in FIGS. 1 and 2.
- FIG. 4 is an exploded cross-sectional view showing a heat sink body and a heat radiating portion of the rotary heat sink shown in FIGS.
- FIG. 5 is a cross-sectional view showing the stator holding member and the stator of the rotary heat sink shown in FIGS. 1 and 2.
- FIG. 6 is a plan view showing the stator of FIG.
- FIG. 7 is a sectional view showing a conventional cooling device.
- FIG. 8 is a view for explaining the operation of the heat sink of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a cross-sectional view showing a rotary heat sink according to one embodiment of the present invention.
- the rotary heat sink 10 has a heat sink body 12, a heat radiating portion 14 rotatably attached to the heat sink body 12, and a driving unit 16 for rotating the heat radiating portion 14 with respect to the heat sink body 12.
- Arrow A indicates the rotation of the heat radiating portion 14.
- Arrow B indicates the flow of air through the heat radiating portion 14.
- a semiconductor element 18 is mounted on a printed circuit board 20, and a heat sink body 12 is in contact with and fixed to the semiconductor element 18.
- the semiconductor element 18 forms a CPU, and generates a lot of heat when used.
- the heat generated by the semiconductor element 18 is transmitted to the heat sink body 12, further transmitted to the heat radiating part 14, and radiated to the surrounding air at the heat radiating part 14.
- Consists of The shaft 22 is rotatably attached to the heat sink body 12, and the heat radiating wing 24 is fixed to the shaft 22 or formed integrally with the shaft 22.
- FIG. 2 is a plan view of the rotary heat sink 10 of FIG.
- the heat dissipating wing portion 24 has a blade 24a similar to a conventional fan blade.
- FIG. 3 is a view for explaining the operation of the heat radiating wing portion 24 of the rotary heat sink 10 shown in FIGS. 1 and 2.
- the blades 24a of the heat radiating wing 24 generate a flow of ambient air while the heat radiating wing 24 rotates.
- Arrow B indicates airflow relative to blade 24a. Air flows along blade 24a with relatively low resistance, and the temperature boundary layer around blade 24a is easily wiped away.
- FIG. 2 is an exploded cross-sectional view showing a heat sink 12 and a heat radiating portion 14. 1 and 4, the heat sink body 12 has a circular mounting recess 26 into which the shaft portion 22 of the heat radiation portion 14 is fitted.
- the lower end of the shaft portion 22 of the heat radiating portion 14 is a circular flange 22a, and the diameter of the flange 22a is slightly smaller than the diameter of the mounting recess 26.
- Mercury 28 is inserted into mounting recess 26 around flange 22a with flange 22a fitted in mounting recess 26. The mercury 28 contacts the bottom surface, the cylindrical side surface, and the upper surface of the flange 22a, and also contacts the bottom surface and the cylindrical side surface of the mounting recess 26.
- the mercury 28 helps transfer heat from the heat sink body 12 to the shaft portion 22 of the heat radiating portion 14 and forms a fluid bearing between the heat sink body 12 and the shaft portion 22.
- a ring-shaped permanent magnet 30 is arranged around the shaft 22.
- the ring-shaped permanent magnet 30 may have a structure composed of two semi-circular magnets, or may be arranged around the shaft 22 as another structure.
- the ring-shaped permanent magnet 30 is located above the flange 22a, and is fixed to the cylindrical side surface of the mounting recess 26 with an adhesive.
- a magnetic fluid 32 is disposed in a circular gap between the permanent magnet 30 and the shaft 22.
- the magnetic fluid 32 is held by the permanent magnet 30 by the magnetic force of the permanent magnet 30.
- the permanent magnet 30 and the magnetic fluid 32 form a seal against the mercury 28 and also act as a bearing for the shaft 22.
- FIG. 5 is a sectional view showing the stator holding member 34 and the stator 36 of the rotary heat sink 10 shown in FIGS. 1 and 2.
- FIG. 6 is a plan view showing the stator 36 of FIG.
- the stator holding member 34 is a cylindrical member, and the stator holding member 34 is disposed coaxially with the shaft portion 22 of the heat radiation portion 14.
- the bottom of the stator holding member 34 is fixed to the permanent magnet 30 with an adhesive. However, the bottom of the stator holding member 34 is heated It may be fixed to the sink body 12.
- the stator 36 is held in an upper portion of the stator holding member 34.
- the stator 36 of the embodiment has a winding structure like an armature of a known electric motor.
- the rotor 38 is disposed on the heat radiating wing 24.
- rotor 38 comprises a permanent magnet.
- the rotor 38 is disposed around the stator 36 at the same height as the stator 36. Therefore, the stator 36 and the rotor 38 form the same driving means 16 as the electric motor, whereby the heat radiating portion 14 is driven to rotate with respect to the heat sink body 12.
- the heat sink body 12 is arranged in contact with the semiconductor element 18 and receives heat from the semiconductor element 18.
- the heat of the heat sink body 12 is transmitted to the heat radiating portion 14 and is radiated to the surrounding air at the heat radiating portion 14.
- the heat dissipating portion 14 is rotatably mounted on the heat sink body 12, and generates a flow of ambient air while the heat dissipating portion 14 rotates. Therefore, the heat radiating portion 14 always comes into contact with the surrounding air having a low temperature, and a high heat radiating effect can be achieved.
- FIG. 7 is a cross-sectional view showing a conventional cooling device 1.
- the cooling device 1 includes a heat sink 3 having a fin 2 and a fan 4 arranged above the fin 2.
- the heat sink 3 is mounted on the printed circuit board 5 and is in contact with and fixed to the semiconductor element 6.
- the heat generated by the semiconductor element 6 is transmitted to the heat sink 3 and dissipated to the surrounding air at the fin 2.
- the semiconductor element 6 can be cooled by the cooling device 1.
- FIG. 8 is a diagram for explaining the operation of the heat sink 3 of FIG.
- Many fins 2 are provided to cope with the semiconductor element 6 that generates a lot of heat, and the height of the fins 2 is increasing. In such a case, the spacing between adjacent fins 2 is narrow, so that Air does not sufficiently pass through the space between the two, and a temperature boundary layer 7 tends to be formed. When the temperature boundary layer 7 is formed in this manner, the heat radiation efficiency from the fins 2 is reduced. Therefore, it is necessary to rotate the fan 4 at a high speed to wipe the temperature boundary layer 7.
- sufficient cooling performance can be achieved by reducing the volume of the entire cooling device and reducing the rotation speed of the rotating portion.
- the overall height H can be about 30 mm.
- the rotation speed of the fan 4 of the conventional cooling device 1 is 2300 rpm
- the rotation speed of the heat radiation portion 14 of the rotary heat sink 10 of the present invention is set to 1500 rpm. I can do it.
- the overall volume can be reduced, and high cooling efficiency can be obtained at a low rotational speed of the heat radiation portion.
- the shaft portion 22 can be formed of a material having high thermal conductivity, or can be formed by a heat pipe.
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/006186 WO2004001845A1 (ja) | 2002-06-20 | 2002-06-20 | 回転式ヒートシンク |
JP2004515446A JP4141439B2 (ja) | 2002-06-20 | 2002-06-20 | 回転式ヒートシンク |
AU2002315828A AU2002315828A1 (en) | 2002-06-20 | 2002-06-20 | Rotary heat sink |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/006186 WO2004001845A1 (ja) | 2002-06-20 | 2002-06-20 | 回転式ヒートシンク |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004001845A1 true WO2004001845A1 (ja) | 2003-12-31 |
Family
ID=29808126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/006186 WO2004001845A1 (ja) | 2002-06-20 | 2002-06-20 | 回転式ヒートシンク |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4141439B2 (ja) |
AU (1) | AU2002315828A1 (ja) |
WO (1) | WO2004001845A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011530191A (ja) * | 2008-08-04 | 2011-12-15 | サンディア ナショナル ラボラトリーズ | 熱交換装置および、熱除去または伝熱のための方法 |
US9207023B2 (en) | 2007-12-18 | 2015-12-08 | Sandia Corporation | Heat exchanger device and method for heat removal or transfer |
US9244065B1 (en) | 2012-03-16 | 2016-01-26 | Sandia Corporation | Systems, devices, and methods for agglutination assays using sedimentation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101414642B1 (ko) * | 2009-11-20 | 2014-07-03 | 엘지전자 주식회사 | 방열 장치 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH056950A (ja) * | 1991-02-28 | 1993-01-14 | Mitsubishi Electric Corp | 熱交換装置及び熱交換方法及び冷却装置 |
JPH06132434A (ja) * | 1992-10-20 | 1994-05-13 | Hitachi Ltd | ファン搭載半導体装置 |
JPH07254670A (ja) * | 1994-03-16 | 1995-10-03 | Nec Corp | 半導体装置用ヒートシンク |
JP2000009090A (ja) * | 1998-06-23 | 2000-01-11 | Matsushita Electric Ind Co Ltd | 冷却ファン及びそれを用いたヒートシンク装置 |
JP2001178075A (ja) * | 1999-12-13 | 2001-06-29 | Seiko Instruments Inc | 流体軸受モータの熱処理方法及び装置 |
-
2002
- 2002-06-20 AU AU2002315828A patent/AU2002315828A1/en not_active Abandoned
- 2002-06-20 WO PCT/JP2002/006186 patent/WO2004001845A1/ja active Application Filing
- 2002-06-20 JP JP2004515446A patent/JP4141439B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH056950A (ja) * | 1991-02-28 | 1993-01-14 | Mitsubishi Electric Corp | 熱交換装置及び熱交換方法及び冷却装置 |
JPH06132434A (ja) * | 1992-10-20 | 1994-05-13 | Hitachi Ltd | ファン搭載半導体装置 |
JPH07254670A (ja) * | 1994-03-16 | 1995-10-03 | Nec Corp | 半導体装置用ヒートシンク |
JP2000009090A (ja) * | 1998-06-23 | 2000-01-11 | Matsushita Electric Ind Co Ltd | 冷却ファン及びそれを用いたヒートシンク装置 |
JP2001178075A (ja) * | 1999-12-13 | 2001-06-29 | Seiko Instruments Inc | 流体軸受モータの熱処理方法及び装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9207023B2 (en) | 2007-12-18 | 2015-12-08 | Sandia Corporation | Heat exchanger device and method for heat removal or transfer |
JP2011530191A (ja) * | 2008-08-04 | 2011-12-15 | サンディア ナショナル ラボラトリーズ | 熱交換装置および、熱除去または伝熱のための方法 |
US9244065B1 (en) | 2012-03-16 | 2016-01-26 | Sandia Corporation | Systems, devices, and methods for agglutination assays using sedimentation |
Also Published As
Publication number | Publication date |
---|---|
JP4141439B2 (ja) | 2008-08-27 |
AU2002315828A1 (en) | 2004-01-06 |
JPWO2004001845A1 (ja) | 2005-10-27 |
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