CN100370208C - Sintering type heat pipe and manufacturing method thereof - Google Patents
Sintering type heat pipe and manufacturing method thereof Download PDFInfo
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- CN100370208C CN100370208C CNB2005100329842A CN200510032984A CN100370208C CN 100370208 C CN100370208 C CN 100370208C CN B2005100329842 A CNB2005100329842 A CN B2005100329842A CN 200510032984 A CN200510032984 A CN 200510032984A CN 100370208 C CN100370208 C CN 100370208C
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- heat pipe
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- capillary
- capillary structure
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Abstract
The present invention relates to a sintered heat pipe which comprises a casing and a capillary structure arranged on the inner wall of the casing, wherein the capillary structure is in an at least three-segment type structure which is formed by sintering powder with different mutual particle sizes. The manufacture method of the sintered heat pipe of the present invention comprises the following steps: step 1, the casing is provided, and a hard core rod is inserted into the casing; step 2, at least three segments of powder bodies with increasing particle diameters are orderly filled into a gap between the casing and the hard core rod; step 3, the powder bodies in the casing are sintered, and then the hard core rod is extracted; step 4, working liquid is filled into the casing which is vacuumized and sealed.
Description
[technical field]
The present invention relates to a kind of manufacture method of heat transfer unit (HTU), be meant a kind of manufacture method that is applied to the sintered heat pipe of electronic applications especially.
[background technology]
At present, because heat pipe has heat transfer rate faster, and be widely used in the electronic element radiating field.Heat pipe commonly used comprises that one has the sealing tubular shell of certain vacuum degree, and is provided with the single capillary structure of structure that sintering forms and is filled with an amount of hydraulic fluid in housing, and this heat pipe one end is an evaporation ends and the other end is a condensation end.When the heat pipe evaporation ends is heated, the hydraulic fluid carburation by evaporation, steam condenses into liquid after condensation end is emitted heat flowing under the small pressure reduction, and liquid is back to evaporation ends under the capillary force effect of capillary structure, thereby makes heat reach condensation end rapidly by the heat pipe evaporation ends.And the service behaviour of heat pipe is subjected to the influence of capillary pressure difference and backflow resistance two factors, this two factor changes along with the size of the capillary porosity of capillary structure, when the capillary porosity hour, it is poor that it has big capillary pressure, can drive coagulating liq enters in the capillary structure and refluxes to evaporation ends, but then, the frictional force and the viscous force that reduce hydraulic fluid is refluxed of capillary porosity increase, be that hydraulic fluid backflow resistance increases, cause the hydraulic fluid back-flow velocity slow, easily make heat pipe in evaporation ends generation dry combustion method phenomenon, and when the capillary porosity was big, hydraulic fluid was subjected to less backflow resistance, but, the capillary pressure difference that makes coagulating liq suck capillary structure reduces thereupon, reduces the hydraulic fluid capacity of returns, also can make heat pipe in evaporation ends generation dry combustion method phenomenon.
[summary of the invention]
Technical problem to be solved by this invention is to provide the manufacture method of the sintered heat pipe that a kind of capillary pressure difference is big, the backflow resistance is little.
Technical problem to be solved by this invention is achieved through the following technical solutions: sintered heat pipe of the present invention comprises a housing and is located at the capillary structure of this inner walls, and this capillary structure serves as reasons each other that granular size powder sintering inequality forms three stage structure at least.
The manufacture method of sintered heat pipe of the present invention may further comprise the steps: 1) housing is provided, inserts a hard core rod in it; 2) in the gap of this housing and hard core rod, fill at least three sections powders that particle diameter increases progressively successively; 3) powder in this housing of sintering is then extracted hard core rod out; 4) in housing, fill hydraulic fluid, vacuumize sealing.
Compared with prior art, the capillary structure of sintered heat pipe of the present invention is formed by the different powder sintering of particle diameter, thereby produce the different capillary structure in capillary porosity, wherein, it is poor that the capillary structure of less capillary porosity produces bigger capillary pressure, drives condensed fluid and reflux in capillary structure, simultaneously, the capillary structure of big capillary porosity produces less backflow resistance to the backflow hydraulic fluid, and hydraulic fluid refluxes rapidly.
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
[description of drawings]
Fig. 1 is that sintered heat pipe of the present invention is along its axis profile schematic diagram.
Fig. 2 is a sintered heat pipe manufacturing flow chart of the present invention.
Fig. 3 to Fig. 6 is a sintered heat pipe manufacture process schematic diagram of the present invention.
[specific embodiment]
See also Fig. 1, sintered heat pipe of the present invention has a housing 11 and is formed at capillary structure on these housing 11 inwalls, and this housing 11 is to be made by heat conductivility good material such as copper, albronze etc., and its shape can be geometries such as tubular, plate shape.This capillary structure is formed by sintering such as powder such as copper powders, and it comprises the first capillary structure section 12, the second capillary structure section 13 and the 3rd capillary structure section 14 that increases successively along housing 11 axial capillary porosities.Be filled with an amount of hydraulic fluid in this heat pipe, this hydraulic fluid is selected the stable liquid of low boiling chemical property such as ethanol, water etc. for use.
See also Fig. 2 to Fig. 6, above-mentioned sintered heat pipe can be manufactured by the following method: 1) housing 11 is provided, inserts a hard core rod 20 in it, and keep the axle center conllinear of hard core rod 20 and housing 11; 2) in the gap of this housing 11 and hard core rod 20, fill the copper powder that three sections certain altitude particle diameters increase progressively successively; 3) copper powder in this housing 11 of 1000 ℃ of left and right sides sintering is then extracted hard core rod 20 out; 4) in housing 11, fill hydraulic fluid (figure does not show), vacuumize sealing, make sintered heat pipe of the present invention.
Above-mentioned sintered heat pipe adds man-hour and since the particle diameter of copper powder along housing shaft to increasing progressively, so after the copper powder inserted can not fall into the copper powder of last time inserting and mix, be convenient to fill processing.
The above-mentioned powder that is used for sintering formation capillary structure is not limited to copper powder, can be other metal-powder such as signal bronze powder, aluminium powder or ceramic powder etc., and its sintering temperature is done corresponding the variation according to the powder that is adopted.The particle diameter of this powder can be selected according to actual needs.
Compare with conventional heat pipe, the capillary porosity of the capillary structure of sintered heat pipe of the present invention changes in gradient along housing shaft, wherein, it is poor that the capillary structure of less capillary porosity produces big capillary pressure, being convenient to condensed fluid enters in the capillary structure and refluxes in capillary structure, simultaneously, the capillary structure of big capillary porosity produces less backflow resistance to the backflow hydraulic fluid, and hydraulic fluid refluxes rapidly.As, with heat pipe the 3rd capillary structure section 14 place ends as evaporation ends, the first capillary structure section, 12 place ends are as condensation end, be that heat pipe successively decreases from evaporation ends to the capillary porosity of condensation end capillary structure, at condensation end, because the capillary porosity of the first capillary structure section 12 is less, it is poor to produce big capillary pressure, make a large amount of condensing working liquid be easy to suck in the first capillary structure section 12, thereby refluxed to evaporation ends by condensation end in capillary structure, and the capillary porosity of heat pipe increases progressively to evaporation ends by condensation end, then the backflow resistance of hydraulic fluid successively decreases, back-flow velocity increases, and is back to evaporation ends quickly and participates in vaporization cycle once more; And for example, with the heat pipe first capillary structure section 12 place ends as evaporation ends, the 3rd capillary structure section 14 place ends are as condensation end, promptly the capillary porosity from evaporation ends to the condensation end capillary structure increases progressively, at condensation end, because the capillary porosity of the 3rd capillary structure section 14 is bigger, so it is less to the resistance that condensed fluid refluxes, and the capillary porosity from condensation end to the evaporation ends capillary structure reduces successively, the capillary pressure difference of its generation increases successively, so drives condensed fluid by the capillary pressure difference produces automatic adsorption function and is back to evaporation ends more swimmingly and participates in vaporization cycle once more.In addition, the capillary porosity of the first capillary structure section 12 of sintered heat pipe of the present invention is less, so have the large surface area and the external world to carry out heat exchange.
The distribution of the capillary structure of sintered heat pipe of the present invention on heat pipe is axial is not limited to three sections, and it can be four sections or other multi-segment structure, and its manufacture method can change according to this structure.
Claims (3)
1. the manufacture method of a sintered heat pipe, this sintered heat pipe comprises a housing and is located at the capillary structure of this inner walls, this capillary structure is served as reasons each other, and granular size powder sintering inequality forms three stage structure at least, the manufacture method of this sintered heat pipe may further comprise the steps: 1) housing is provided, inserts a hard core rod in it; 2) in the gap of this housing and hard core rod, fill at least three sections powders that particle diameter increases progressively successively; 3) powder in this housing of sintering is then extracted hard core rod out; 4) in housing, fill hydraulic fluid, vacuumize sealing.
2. the manufacture method of sintered heat pipe according to claim 1, it is characterized in that: described powder is metal-powder or ceramic powder.
3. as the manufacture method of sintered heat pipe as described in the claim 2, it is characterized in that: described metal-powder is copper powder or signal bronze powder or aluminium powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100329842A CN100370208C (en) | 2005-01-22 | 2005-01-22 | Sintering type heat pipe and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100329842A CN100370208C (en) | 2005-01-22 | 2005-01-22 | Sintering type heat pipe and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808044A CN1808044A (en) | 2006-07-26 |
| CN100370208C true CN100370208C (en) | 2008-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100329842A Expired - Fee Related CN100370208C (en) | 2005-01-22 | 2005-01-22 | Sintering type heat pipe and manufacturing method thereof |
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| CN (1) | CN100370208C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI498074B (en) * | 2010-09-23 | 2015-08-21 | Foxconn Tech Co Ltd | Heat dissipation apparatus for portable consumer electronic device |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767270B (en) * | 2010-01-26 | 2011-11-02 | 中山伟强科技有限公司 | Sealing structure of vapor chamber and manufacturing method |
| CN102353291A (en) * | 2011-08-15 | 2012-02-15 | 深圳市凯强热传科技有限公司 | Manufacturing method of plate-shaped heat pipe and core rod assembly |
| CN103105084B (en) * | 2011-11-10 | 2015-08-12 | 索士亚科技股份有限公司 | The composition structure of heat pipe and capillary structure thereof |
| CN104776740A (en) * | 2014-01-14 | 2015-07-15 | 江苏格业新材料科技有限公司 | Method for preparing high-efficiency micro heat tube by combining copper powder with copper oxide powder |
| CN105509522A (en) * | 2014-09-26 | 2016-04-20 | 江苏格业新材料科技有限公司 | Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe |
| TWI654404B (en) * | 2017-05-05 | 2019-03-21 | 雙鴻科技股份有限公司 | Temperature plate |
| CN107388862A (en) * | 2017-06-12 | 2017-11-24 | 海蓝星光学科技(东莞)有限公司 | A kind of double capillary wick LED heat conducting pipes and its preparation technology |
| CN107356143A (en) * | 2017-06-26 | 2017-11-17 | 上海嘉熙科技有限公司 | Hot superconductive radiating component and the motor with hot superconductive radiating component |
| CN113000841B (en) * | 2021-02-24 | 2022-06-28 | 西北有色金属研究院 | Preparation method of porous nickel element with threaded deep hole |
| CN114916198B (en) * | 2022-05-09 | 2023-10-03 | 中国电子科技集团公司第十研究所 | Porous capillary heat dissipation structure embedded with gradient holes and manufacturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108239A (en) * | 1975-04-10 | 1978-08-22 | Siemens Aktiengesellschaft | Heat pipe |
| US4274479A (en) * | 1978-09-21 | 1981-06-23 | Thermacore, Inc. | Sintered grooved wicks |
| US4489777A (en) * | 1982-01-21 | 1984-12-25 | Del Bagno Anthony C | Heat pipe having multiple integral wick structures |
| US20030141045A1 (en) * | 2002-01-30 | 2003-07-31 | Samsung Electro-Mechanics Co., Ltd. | Heat pipe and method of manufacturing the same |
| CN2613740Y (en) * | 2003-04-17 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Heat pipe |
| CN1506650A (en) * | 2002-12-13 | 2004-06-23 | 徐惠群 | Sintered heat pipe capillary structure |
-
2005
- 2005-01-22 CN CNB2005100329842A patent/CN100370208C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4108239A (en) * | 1975-04-10 | 1978-08-22 | Siemens Aktiengesellschaft | Heat pipe |
| US4274479A (en) * | 1978-09-21 | 1981-06-23 | Thermacore, Inc. | Sintered grooved wicks |
| US4489777A (en) * | 1982-01-21 | 1984-12-25 | Del Bagno Anthony C | Heat pipe having multiple integral wick structures |
| US20030141045A1 (en) * | 2002-01-30 | 2003-07-31 | Samsung Electro-Mechanics Co., Ltd. | Heat pipe and method of manufacturing the same |
| CN1506650A (en) * | 2002-12-13 | 2004-06-23 | 徐惠群 | Sintered heat pipe capillary structure |
| CN2613740Y (en) * | 2003-04-17 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Heat pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI498074B (en) * | 2010-09-23 | 2015-08-21 | Foxconn Tech Co Ltd | Heat dissipation apparatus for portable consumer electronic device |
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| CN1808044A (en) | 2006-07-26 |
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