CN101055158A - Heat pipe - Google Patents
Heat pipe Download PDFInfo
- Publication number
- CN101055158A CN101055158A CNA2006100603269A CN200610060326A CN101055158A CN 101055158 A CN101055158 A CN 101055158A CN A2006100603269 A CNA2006100603269 A CN A2006100603269A CN 200610060326 A CN200610060326 A CN 200610060326A CN 101055158 A CN101055158 A CN 101055158A
- Authority
- CN
- China
- Prior art keywords
- capillary structure
- heat pipe
- capillary
- section
- inner walls
- 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.)
- Pending
Links
- 238000009833 condensation Methods 0.000 claims abstract description 18
- 230000005494 condensation Effects 0.000 claims abstract description 18
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 19
- 235000020610 powder formula Nutrition 0.000 claims description 4
- 230000001413 cellular effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000009835 boiling Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—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 with tubes having a capillary structure
- F28D15/046—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 with tubes having a capillary structure characterised by the material or the construction of the capillary structure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a heat pipe which includes a sealed heat transmission cavity whose inner wall is equipped with capillary structure and in which appropriate working liquid is sealed. The heat pipe includes evaporation section, condensation section, thermal insulation section, and a first capillary structure and a second capillary structure is arranged in sequence on the inner wall of the thermal insulation section shell along the direction from the shell to inner cavity center, and the pore aperture of the first capillary structure is larger than the same of the second capillary structure. Two capillary structures with different pore apertures are arranged in sequence on the inner wall of the heat pipe, in this manner, reflux resistance of the liquid can be reduced to guarantee that the evaporation section has enough working liquid, and also a lot of steam nucleating points can be provided for the evaporation section to accelerate boiling efficiency for the working medium, in the meantime, the composite capillary structure of the thermal insulation section can increase antigravity property of the heat pipe, thereby improving heat conduction efficiency for the heat pipe.
Description
[technical field]
The present invention relates to a kind of heat transfer unit (HTU), be meant a kind of heat pipe especially.
[background technology]
That heat pipe has is super-silent, flash heat transfer, high thermoconductivity, in light weight, characteristic such as size is little, no movable piece, simple in structure and multipurpose, and heat pipe can be played the part of the superconductor role of a large amount of heat energy of quick transmission and is widely used under the situation that temperature almost remains unchanged.
The essential structure of heat pipe is that its central space then is empty state, and injects the working fluid that is equivalent to capillary structure layer hole total measurement (volume) in the airtight tubing that vacuumizes in the capillary structure layer of airtight pipe material inner wall lining with easy absorption working fluid.Heat pipe can be divided into evaporator section, condensation segment and adiabatic section therebetween according to the relevant position that absorbs with the heat that sheds; Its operation principle is that the liquid by working fluid, the latent heat of vapour two phase change transmit heat: be included in evaporator section and take away a large amount of heats by evaporation latent heat from thermal source, make the working fluid evaporation and make steam fast by space in the pipe, arriving the condensation segment cooling condenses into liquid and discharges heat energy, above-mentioned hydraulic fluid then is back to evaporator section by the capillary force that capillary structure layer provided that is affixed on the heat pipe inwall, and the heat energy that reaches lasting phase change circulates and transmits heat.
The capillary force capillary effective aperture that capillary structure is had in the heat pipe (Δ P=4 * γ * cos θ/d that is inversely proportional to it
p=1.68 * γ * cos θ/d
cγ: surface tension; θ: interface contact angle; The d granular size; Capillary aperture (dc) concerns d with granular size (dp)
c=0.42d
p), and the resistance that the liquid in pipe backflow is met with and effective capillary aperture of capillary structure are inversely proportional to, and both effectively the pore footpath is more little, and capillary force is strong more, liquid backflow resistance is big more.The capillary structure of different types has the effective capillary aperture that varies in size, and wherein, the plough groove type capillary structure has bigger effective capillary aperture, and its capillary force is little and convection cell backflow resistance is also less; And sintered powder and screen type capillary structure are owing to all form vesicular structure, therefore has littler effective capillary aperture, can produce bigger capillary force to liquid, but along with hole diminishes, liquid backflow resistance is also increased, this is that frictional resistance that fluid is suffered and viscous force are also big more because effectively the capillary aperture is more little.
Fig. 1 is the axial section schematic diagram of existing heat pipe, this heat pipe comprises metal shell 10 and is located at capillary structure 20 in the housing 10, this heat pipe one end forms evaporator section 40, the other end forms condensation segment 60, and can be two sections intermediate arrangement adiabatic sections 50 according to application need, this evaporator section 40 is used to receive the heat of extraneous thermal source, and the working media in the heat transferred pipe (figure does not show), make its evaporation, adiabatic section 50 mainly is to be responsible for transmission steam, and undertaking and extraneous adiabatic effect, the effect of this condensation segment 60 is the steam condensations that make steam state, and heat is conducted to by tube wall pipe is outer to be directed in the atmosphere with cooling system again.During use, the evaporator section 40 of heat pipe places the high temperature heat source place, hydraulic fluid in the airtight metal shell 10 evaporates by heat into gaseous state, this steam flows to via steam flow channels in the housing 10 and emits heat behind the condensation segment 60 and be condensed into liquid state, this condensed fluid via adiabatic section 50 fast return evaporator sections 40 and continue working cycles next time, so is passed to the other end with heat from an end under the absorption affinity of metal shell 10 capillary structure of inner wall.
This inside heat pipe is 60 capillary structures that all adopt unimodality from evaporator section 40 to condensation segment, as single plough groove type structure, single sintered powder formula structure or single screen type structure, therefore the maximum heat current density that can bear in each part of heat pipe work almost is consistent, the capillary structure that this structure is single can't be taken into account less fluid backflow resistance and bigger capillary force simultaneously, and also can not provide effective heat conduction path between the hydraulic fluid simultaneously in extraneous thermal source and pipe.
[summary of the invention]
In view of this, be necessary to provide a kind of hot transfer efficiency high heat pipe.
A kind of heat pipe, comprise housing, be arranged at the capillary structure of inner walls and enclose the interior hydraulic fluid of housing, this heat pipe comprises condensation segment, adiabatic section and evaporator section, this adiabatic section inner walls is provided with one first capillary structure and one second capillary structure in regular turn in housing to the direction of lumen centers, and the capillary aperture of described first capillary structure is greater than the capillary aperture of second capillary structure.
Described heat pipe compared with prior art has following advantage: above-mentioned heat pipe inwall is provided with the capillary structure that two capillary apertures vary in size in regular turn, the backflow resistance that can effectively reduce fluid guarantees the enough working medias of evaporator section, provide a large amount of steam nucleating point to quicken the boiling efficient of working media for evaporator section again, the combined capillary structure of adiabatic section also plays the effect of the antigravity characteristic that increases heat pipe simultaneously, thereby promotes Heat Transfer of Heat Pipe on Heat Pipe efficient.
With reference to the accompanying drawings, the invention will be further described in conjunction with specific embodiments.
[description of drawings]
Fig. 1 is the axial section schematic diagram of prior art heat pipe.
Fig. 2 is the axial section schematic diagram of first embodiment of heat pipe of the present invention.
Fig. 3 is the cross sectional representation of the adiabatic section of heat pipe shown in Figure 2.
Fig. 4 is the axial section schematic diagram of second embodiment of heat pipe of the present invention.
Fig. 5 is the axial section schematic diagram of the 3rd embodiment of heat pipe of the present invention.
[specific embodiment]
Fig. 2 and Fig. 3 are respectively the axial section of first embodiment of heat pipe of the present invention and the schematic cross-section of adiabatic section 500 thereof.This heat pipe is to come for example with straight type heat pipe, and it mainly comprises housing 100, be arranged at the capillary structure of housing 100 inwalls and be sealing into an amount of hydraulic fluid (not shown) in the housing 100.This housing 100 can be made by thermal conductivity good metal materials such as copper, aluminium, generally is pumped into vacuum in it or near vacuum, is beneficial to the thermal evaporation that is subjected to of hydraulic fluid.Hydraulic fluid is generally the higher liquid of latent heat such as water, alcohol, ammoniacal liquor and composition thereof.
This heat pipe has been distinguished evaporator section 400, adiabatic section 500,600 3 parts of condensation segment successively by function.Housing 100 inwalls of these condensation segment 600 parts are provided with a plough groove type capillary structure 200, and the capillary aperture of this plough groove type capillary structure 200 is big, and the backflow resistance is little, help hydraulic fluid and are back to adiabatic section 500.Housing 100 inwalls of this adiabatic section 500 and evaporator section 400 parts are provided with a plough groove type capillary structure 200 respectively, and wherein, plough groove type capillary structure 200 inner rings in this adiabatic section 500 add one deck screen type capillary structure 220.The plough groove type capillary structure 200 of this adiabatic section 500 also has the characteristics that the capillary aperture is big, the backflow resistance is little, can rapidly hydraulic fluid be imported evaporator section 400 from condensation segment 600, and, then can reach the purpose of the antigravity characteristic that increases heat pipe at the screen type capillary structure 220 that the inner ring of plough groove type capillary structure 200 adds.
Fig. 4 is the axial section schematic diagram of second embodiment of heat pipe of the present invention.Than first embodiment, its main difference is in the groove of plough groove type capillary structure 200 of housing 100 inwalls of part of its evaporator section 400 the powder filler particle and carries out sintering, thereby the inner ring at this layer plough groove type capillary structure 200 forms another layer sintered type capillary structure 210, in this groove, fill powder except that the intensity that can increase capillary structure, can also form tiny capillary aperture, to increase its capillary force, guarantee in the adiabatic section 500 and the working media of condensation segment 600 coolings be attracted to evaporator section 400 fast and effectively.
Fig. 5 is the axial section schematic diagram of the 3rd embodiment of heat pipe of the present invention.Than second embodiment, the seal casinghousing 100 that its main difference is its evaporator section 400 by the surface to the cavity center, inner ring at its sintered type capillary structure 210 adds screen type capillary structure 220, and its pore size is increased progressively in regular turn by metal shell 100 surfaces to cavity center simultaneously.So both the boiling bubble can be cut apart once more to form more little gas molecule, also will in the heat pipe manufacture process, be improved the bad of its stamen rod demoulding, to increase its production.
Be appreciated that, in embodiments of the present invention, on plough groove type capillary structure 200 inner rings that heat pipe adiabatic section 500 can also be provided with by the inwall at its seal casinghousing 100, add other capillary aperture cellular capillary structure little, reach the capillary force of increase adiabatic section 500 and the purpose of antigravity characteristic thereof than the plough groove type capillary structure.The capillary structure that evaporator section 400 is provided with can be identical with adiabatic section 500, the capillary structure of capillary aperture less than adiabatic section 500 and condensation segment 600 perhaps is set, like this then reduce gradually successively from condensation segment 600, adiabatic section 500 to effective capillary aperture of evaporator section 400 set capillary structures, it is more smooth and easy that withdrawing fluid is refluxed.
Claims (9)
1. heat pipe, comprise housing, be arranged at the capillary structure of inner walls and enclose the interior hydraulic fluid of housing, this heat pipe comprises condensation segment, adiabatic section and evaporator section, it is characterized in that: described adiabatic section inner walls is provided with one first capillary structure and one second capillary structure in regular turn in housing to the direction of lumen centers, and the capillary aperture of described first capillary structure is greater than the capillary aperture of second capillary structure.
2. heat pipe as claimed in claim 1 is characterized in that: described first capillary structure is the plough groove type capillary structure, and described second capillary structure is cellular capillary structure.
3. heat pipe as claimed in claim 1 or 2 is characterized in that: described first capillary structure is the plough groove type capillary structure, and described second capillary structure is the screen type capillary structure.
4. heat pipe as claimed in claim 3, it is characterized in that: described evaporator section inner walls is provided with plough groove type capillary structure and screen type capillary structure in regular turn in housing to the direction of lumen centers, and the screen type capillary structure of this screen type capillary structure and described adiabatic section fuses.
5. heat pipe as claimed in claim 3, it is characterized in that: described evaporator section inner walls is provided with plough groove type capillary structure, sintered powder formula capillary structure and screen type capillary structure in regular turn in housing to the direction of lumen centers, and the screen type capillary structure of this screen type capillary structure and described adiabatic section fuses.
6. heat pipe as claimed in claim 5 is characterized in that: the capillary pore size of described plough groove type, sintered powder formula and screen type capillary structure is increased progressively in regular turn by the direction of housing to lumen centers.
7. heat pipe as claimed in claim 3 is characterized in that: described evaporator section inner walls is provided with plough groove type capillary structure and sintered powder formula capillary structure in regular turn in housing to the direction of lumen centers.
8 heat pipes as claimed in claim 1, it is characterized in that: the capillary aperture of the capillary structure that the capillary aperture of the capillary structure that described adiabatic section inner walls is provided with is provided with greater than described condensation segment inner walls, and be less than or equal to the capillary aperture of the capillary structure that described evaporator section inner walls is provided with.
9. heat pipe as claimed in claim 8 is characterized in that: the capillary structure of described condensation segment inner walls setting is the plough groove type capillary structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100603269A CN101055158A (en) | 2006-04-14 | 2006-04-14 | Heat pipe |
| US11/309,493 US20070240858A1 (en) | 2006-04-14 | 2006-08-11 | Heat pipe with composite capillary wick structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100603269A CN101055158A (en) | 2006-04-14 | 2006-04-14 | Heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101055158A true CN101055158A (en) | 2007-10-17 |
Family
ID=38603733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100603269A Pending CN101055158A (en) | 2006-04-14 | 2006-04-14 | Heat pipe |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20070240858A1 (en) |
| CN (1) | CN101055158A (en) |
Cited By (9)
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| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN103217038A (en) * | 2012-01-19 | 2013-07-24 | 奇鋐科技股份有限公司 | Improved heat pipe structure |
| CN107245286A (en) * | 2017-07-10 | 2017-10-13 | 广州华钻电子科技有限公司 | A kind of heat pipe of super hydrophilic nano paint and its coating containing hydrophilic |
| CN110044193A (en) * | 2019-04-29 | 2019-07-23 | 深圳市尚翼实业有限公司 | A kind of heat pipe |
| CN110160386A (en) * | 2019-06-21 | 2019-08-23 | 山东节创能源科技有限公司 | A kind of heat exchange of liquid liquid flat-plate heat pipe and its processing technology |
| US10638639B1 (en) | 2015-08-07 | 2020-04-28 | Advanced Cooling Technologies, Inc. | Double sided heat exchanger cooling unit |
| US10837712B1 (en) | 2015-04-15 | 2020-11-17 | Advanced Cooling Technologies, Inc. | Multi-bore constant conductance heat pipe for high heat flux and thermal storage |
| WO2021208730A1 (en) * | 2020-04-15 | 2021-10-21 | 华为技术有限公司 | Two-phase phase change heat dissipation device and terminal apparatus |
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| CN100480612C (en) * | 2006-04-28 | 2009-04-22 | 富准精密工业(深圳)有限公司 | Heat pipe |
| SG142174A1 (en) * | 2006-10-11 | 2008-05-28 | Iplato Pte Ltd | Method for heat transfer and device therefor |
| CN101819002A (en) * | 2009-02-26 | 2010-09-01 | 富瑞精密组件（昆山）有限公司 | Flat and thin type heat pipe |
| US20160131440A1 (en) * | 2009-04-10 | 2016-05-12 | Nexchip Technologies | Method for heat transfer and device therefor |
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| EP2527776A1 (en) * | 2011-05-24 | 2012-11-28 | Thermal Corp. | Capillary device for use in heat pipe and method of manufacturing such capillary device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN103217038A (en) * | 2012-01-19 | 2013-07-24 | 奇鋐科技股份有限公司 | Improved heat pipe structure |
| US10837712B1 (en) | 2015-04-15 | 2020-11-17 | Advanced Cooling Technologies, Inc. | Multi-bore constant conductance heat pipe for high heat flux and thermal storage |
| US10638639B1 (en) | 2015-08-07 | 2020-04-28 | Advanced Cooling Technologies, Inc. | Double sided heat exchanger cooling unit |
| CN107245286A (en) * | 2017-07-10 | 2017-10-13 | 广州华钻电子科技有限公司 | A kind of heat pipe of super hydrophilic nano paint and its coating containing hydrophilic |
| CN110044193A (en) * | 2019-04-29 | 2019-07-23 | 深圳市尚翼实业有限公司 | A kind of heat pipe |
| CN110160386A (en) * | 2019-06-21 | 2019-08-23 | 山东节创能源科技有限公司 | A kind of heat exchange of liquid liquid flat-plate heat pipe and its processing technology |
| CN110160386B (en) * | 2019-06-21 | 2024-02-09 | 山东节创能源科技有限公司 | Flat heat pipe for liquid-liquid heat exchange and processing technology thereof |
| WO2021208730A1 (en) * | 2020-04-15 | 2021-10-21 | 华为技术有限公司 | Two-phase phase change heat dissipation device and terminal apparatus |
| CN113865394A (en) * | 2021-09-29 | 2021-12-31 | 太仓市华盈电子材料有限公司 | Manufacturing method of sintered heat pipe |
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| US20070240858A1 (en) | 2007-10-18 |
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