CN1318818C - Heat-pipe and preparation method - Google Patents
Heat-pipe and preparation method Download PDFInfo
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- CN1318818C CN1318818C CNB2003101174604A CN200310117460A CN1318818C CN 1318818 C CN1318818 C CN 1318818C CN B2003101174604 A CNB2003101174604 A CN B2003101174604A CN 200310117460 A CN200310117460 A CN 200310117460A CN 1318818 C CN1318818 C CN 1318818C
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- heat pipe
- copper
- hollow tube
- heat
- pipe
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Abstract
The present invention relates to a heat pipe and a making method. The heat pipe comprises a hollow pipe shell, a capillary liquid absorbing core stuck to the inner wall of the pipe shell and working liquid filled in the capillary liquid absorbing core and sealed in the pipe shell, wherein the capillary liquid absorbing core is a nanometer copper fiber web. The present invention also comprises the making method of the heat pipe. The capillarity of the liquid absorbing core of the heat pipe of the present invention is improved; the present invention ensures that the liquid absorbing core is stuck to the inner wall of the heat pipe; consequently, the heat transferring efficiency of the heat pipe is high; the heat pipe is suitable for a radiating device of an electronic device.
Description
[technical field]
The present invention relates to conductive structure, particularly a kind of heat pipe and preparation method thereof.
[background technology]
Heat pipe is the heat-conductive assembly that dependence self internal work fluid phase transformation realizes heat conduction, and it has good characteristics such as high-termal conductivity, good isothermal, and good heat conduction effect is widely used.
Electronic technology develops rapidly in recent years, the high frequency of electronic device, high speed and integrated circuit intensive and microminiaturized, make unit volume electronic device caloric value increase severely, characteristics such as hot pipe technique is efficient with it, compactness and flexibility and reliability are fit to solve the heat dissipation problem that present electronic device is derived because of performance boost.
As shown in Figure 1, typical heat pipe 10 by shell 11, imbibition core 12 (capillary structure) and be sealed in the pipe in working fluid 13 form.The making of heat pipe 10 is sealed after being full of working fluid 13 in the imbibition core 12 of being close to shell 11 inwalls filling after being evacuated in the pipe with suitable working fluid 13, making earlier usually.One end of heat pipe 10 is evaporator section 10a (bringing-up section), and the other end is condensation segment 10b (cooling section), can arrange the adiabatic section between evaporator section 10a and condensation segment 10b according to application need.Working fluid 13 evaporation gasifications form steam 14 in the imbibition core 12 when heat pipe 10 evaporator section 10a are heated, steam 14 is at the dirty condensation segment 10b to heat pipe 10 of slight pressure difference effect, condense into working fluid 13 and emit heat 15, working fluid 13 flows back to evaporator section 10a by capillarity along imbibition core 12 again.So circulation, heat 15 constantly reaches condensation segment 10b by the evaporator section 10a of heat pipe 10, and the low-temperature receiver of the section of being condensed 10b one end absorbs.
(1) heat 15 passes to working fluid 13 by heat pipe 10 shells 11 with the imbibition core 12 that is full of working fluid 13 from thermal source;
(2) hydraulic fluid 13 liquid-gas in evaporator section 10a divides on the interface and evaporates;
(3) steam 14 flows to condensation segment 10b from evaporator section 10a;
(4) steam 14 solution-air in condensation segment 10b is divided on the interface and is condensed;
(5) heat 15 divides interface to pass to low-temperature receiver by imbibition core 12, hydraulic fluid 13 and shell 11 from solution-air;
(6) in imbibition core 12 since capillarity make condensation after working fluid 13 be back to evaporator section 10a.
Find out from above-mentioned six processes, imbibition core 12 plays important conductive force in process (1) and process (5), in process (6) condensed working fluid 13 rapid backflows are played a decisive role, therefore, imbibition core 12 is extremely important for normally working effectively of heat pipe 10.
Silk screen type imbibition core ratio is easier to make, and purchases the silk screen of typing mesh number in market, and its material is generally copper, stainless steel, wire netting, can select according to the compatibility of heat pipe work fluid.Get final product through rolling into needed shape insertion heat pipe after cleaning and the necessary processing after silk screen is bought, therefore in heat pipe, use more.
But, directly the silk screen type imbibition core that inserts in the heat pipe package relies on its elasticity tension to be affixed on the heat pipe package inwall, when elasticity is not enough, be prone to not tight, the uneven phenomenon of imbibition core applying inner wall of tube shell, cause heat pipe for thermal conductivity efficient to reduce, even heat pipe hot-spot and damage heat pipe even electronic device; In addition, general silk screen is thicker, and its capillary performance haves much room for improvement.
Therefore, the heat pipe that provides a kind of silk screen type imbibition core to be close to heat pipe package inwall, the enhancing of capillary performance is very necessary.
[summary of the invention]
The technical problem to be solved in the present invention is a heat pipe silk screen type imbibition core applying heat pipe package inwall defective tightness in the prior art, even, and the capillary performance is not ideal enough, is unfavorable for the heat pipe for thermal conductivity improved efficiency; The objective of the invention is to solve the problems of the technologies described above, provide a kind of imbibition core can be close to heat pipe that heat pipe package inwall, capillary performance improve and preparation method thereof.
The technical scheme that the present invention solves the problems of the technologies described above provides a heat pipe, this heat pipe comprises a hollow bulb, is close to the capillary wick of inner wall of tube shell and is full of capillary wick and is sealed in working fluid in the shell, wherein capillary wick is a nanometer copper fleece, and (electrospinning) is formed at the heat pipe package inwall by the electrospinning organization method.
The present invention also provides the preparation method of above-mentioned heat pipe, and this heat control Preparation Method comprises the following steps: to provide one to comprise the two ends and the hollow tube of an end closure wherein; Form a nanometer copper fleece as the imbibition core at the hollow tube inwall; To be evacuated in the hollow tube, in pipe, pour into appropriate amount of fluid as working fluid; The hollow tube other end is sealed, working fluid is sealed in the pipe; Wherein forming a nanometer copper fleece in hollow tube may further comprise the steps: preparation copper ions gel also injects gel in the hollow tube; Electricity consumption weaving method (electrospinning) generates the copper compound network structure of being close to inner wall of tube shell; The calcining hollow tube is reduced into nanometer copper fleece with the copper compound network structure on its inwall.
Compared with prior art, heat pipe provided by the present invention has following advantage: the capillary wick of heat pipe directly is formed at the heat pipe package inwall by the electrospinning organization method, tight and be close to inner wall of tube shell equably, make heat pipe for thermal conductivity evenly, rapidly, avoid the heat pipe hot-spot and damage heat pipe itself or electronic device; The imbibition core is a nanometer copper fleece in addition, and the capillary performance strengthens, and helps heat pipe for thermal conductivity efficient and improves.
[description of drawings]
Fig. 1 is a known techniques heat pipe operation principle schematic diagram.
Fig. 2 is an inside heat pipe structure radial section schematic diagram of the present invention.
Fig. 3 is the method flow diagram that forms the imbibition core at inner wall of tube shell.
Fig. 4 is with the schematic diagram in the copper ions gel injection hollow tube.
Fig. 5 is that the electrospinning weave generates the cancellated schematic diagram of copper compound.
[specific embodiment]
Below in conjunction with illustrating the specific embodiment that heat pipe provided by the present invention is described:
As shown in Figure 2, heat pipe 20 provided by the present invention comprises shell 21, capillary wick 22 and working fluid (not indicating), and wherein capillary wick 22 is a nanometer copper fleece.
Shell 21 is generally hollow copper pipe, also can adopt different materials according to different needs, as metals such as aluminium, iron.Shell 21 radial sections can be standard circular, also can be abnormal shape, as ellipse, square, rectangle, triangle etc.Shell 21 can also can be the flexure type pipe of any other shape for straight type pipe.Caliber is 2 millimeters～200 millimeters, and pipe range can be from several millimeters to tens of centimetres.
It is circular copper pipe that present embodiment adopts radial section, and caliber is 10 millimeters, long 80 millimeters.
Working fluid comprises liquid such as pure water, ammoniacal liquor, methyl alcohol, acetone, heptane, also can add the particulate of Heat Conduction Material in liquid, is filled with the nano carbon microsphere of nanoscale copper powder etc. as copper powder, nano carbon microsphere, inside, to increase the heat conductivility of working fluid.
Heat pipe preparation method of the present invention is: provide one comprise two ends and wherein the hollow tube of an end closure as shell 21; Form a nanometer copper fleece as imbibition core 22 at shell 21 inwalls; To be evacuated in the shell 21, in pipe, pour into appropriate amount of fluid as working fluid; At last shell 21 other ends are sealed, working fluid is sealed in the shell 21.
Wherein forming a nanometer copper fleece at shell 21 inwalls is described in detail as follows in conjunction with diagram as the step of imbibition core 22:
As shown in Figure 3, forming a nanometer copper fleece on shell 21 inwalls may further comprise the steps: preparation copper ions gel also is injected in the hollow tube of an end closure; Electricity consumption weaving method (electrospinning) generates the copper compound network structure of being close to inner wall of tube shell; The calcining hollow tube is reduced into nanometer copper fleece with the copper compound network structure on the hollow tube inwall.
As shown in Figure 4, configuration copper ions gel 31 and gel 31 injected in the hollow tubes 21.This copper ions gel 31 is to make dissolving in an amount of Kocide SD or the mantoquita adding macromolecule polymer solution, and wherein this high molecular polymer comprises polyvinyl alcohol, and mantoquita comprises Schweinfurt green, and present embodiment adopts polyvinyl alcohol and Kocide SD.This hollow tube 21 comprises copper pipe, aluminum pipe, iron pipe etc., and the amount of required gel 31 is advisable so that this hollow tube 21 is filled.
As shown in Figure 5, electricity consumption weaving method (electrospinning) generates the copper compound network structure of being close to shell 21 inwalls.One high pressure (for example 20kV) power supply 42 at first is provided, connect a metal electrode film first electrode slice 40 at power supply 42 positive poles then, this first electrode slice 40 is inserted in the hollow tube 21 interior colloidal sols 31, another metal electrode film second electrode slice 41 is provided, it is connected with hollow tube 21, again power supply 42 negative poles is received on second electrode slice 41, start power supply 42, pass to high-tension electricity for gel 31, the network structure of copper compound promptly generates on hollow tube 21 inwalls.This copper compound comprises cupric oxide, contains polyvinyl alcohol in the network structure.
The copper compound network structure is cut off the electricity supply after generating, and hollow tube is taken off dry back calcine under reducing atmosphere, and the copper compound network structure is reduced into nanometer copper fleece.The copper fibre diameter of this method gained is generally less than 200 nanometers.Calcining heat is 600～900 ℃, and reducing atmosphere is hydrogen, nitrogen or inert gas argon.Because polyvinyl alcohol decomposes and carbonization under the high temperature, carbon has reproducibility, so when only passing to protective gas such as nitrogen or argon gas in the calcination process, carbon still can be reduced into copper compound the copper metal.
Provided by the present invention directly in heat pipe on electricity consumption weaving (electrospinning) method heat pipe of generating the imbibition core have the following advantages: the copper fleece that electrospinning (electrospinning) method of knitting generates adhere well to the heat pipe inwall, guarantee that promptly heat pipe capillary imbibition core is close to the heat pipe package inwall, avoid heat pipe for thermal conductivity inhomogeneous, prevent that heat pipe from the hot-spot phenomenon occurring and cause the damage of heat pipe even electronic device; The copper fleece that electrospinning (electrospinning) method of knitting generates, its fibre diameter in the nano-grade size scope, the capillary function admirable, promptly the capillarity of heat pipe capillary wick can be improved, thereby heat pipe for thermal conductivity efficient improves.
Claims (10)
1. heat pipe, it comprises:
One hollow bulb;
One is close to the capillary wick of inner wall of tube shell; And
Be sealed in the working fluid in the shell;
It is characterized in that this capillary wick is a nanometer copper fleece.
2. heat pipe as claimed in claim 1 is characterized in that the fibroreticulate copper fibre diameter of this copper is less than 200 nanometers.
3. a heat control Preparation Method comprises the following steps:
Provide one to comprise the two ends and the hollow tube of an end closure wherein;
Form one at the hollow tube inwall and be close to the nanometer copper fleece of this inwall as the imbibition core;
To be evacuated in the hollow tube, in pipe, pour into appropriate amount of fluid as working fluid;
The hollow tube other end is sealed;
It is characterized in that the hollow tube inwall forms a nanometer copper fleece of being close to this inwall and may further comprise the steps:
Preparation copper ions gel also injects gel in the hollow tube;
Electricity consumption weaving method generates the copper compound network structure of being close to inner wall of tube shell;
The calcining hollow tube is reduced into nanometer copper fleece with the copper compound network structure on its inwall.
4. heat control Preparation Method as claimed in claim 3 is characterized in that this copper ions gel can make by an amount of Kocide SD or mantoquita are dissolved in the macromolecule polymer solution.
5. heat control Preparation Method as claimed in claim 4 is characterized in that this high molecular polymer comprises polyvinyl alcohol.
6. heat control Preparation Method as claimed in claim 4 is characterized in that this mantoquita comprises Schweinfurt green.
7. heat control Preparation Method as claimed in claim 3, heat pipe connects power cathode when it is characterized in that electrospinning weave generation copper compound network structure.
8. heat control Preparation Method as claimed in claim 3, the positive source electrode slice inserts in the hollow tube inner gel when it is characterized in that electrospinning weave generation copper compound network structure.
9. heat control Preparation Method as claimed in claim 3 is characterized in that calcination temperature range is 600～900 degrees centigrade.
10. heat control Preparation Method as claimed in claim 3 is characterized in that calcining reduction atmosphere comprises hydrogen, nitrogen, argon gas or its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101174604A CN1318818C (en) | 2003-12-13 | 2003-12-13 | Heat-pipe and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101174604A CN1318818C (en) | 2003-12-13 | 2003-12-13 | Heat-pipe and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1627031A CN1627031A (en) | 2005-06-15 |
| CN1318818C true CN1318818C (en) | 2007-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101174604A Expired - Fee Related CN1318818C (en) | 2003-12-13 | 2003-12-13 | Heat-pipe and preparation method |
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| Country | Link |
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| CN (1) | CN1318818C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100582636C (en) * | 2005-09-28 | 2010-01-20 | 鸿富锦精密工业（深圳）有限公司 | Preparation method of hot pipes |
| FR2938323B1 (en) * | 2008-11-12 | 2010-12-24 | Astrium Sas | THERMAL REGULATION DEVICE WITH A NETWORK OF INTERCONNECTED CAPILLARY CALODUCES |
| CN102573424B (en) * | 2012-01-17 | 2015-05-20 | 长沙力元新材料有限责任公司 | Wick material for heat sink device for electronic component, heat sink device and preparation method of heat sink device |
| CN104759627B (en) * | 2014-01-03 | 2017-08-29 | 江苏格业新材料科技有限公司 | A kind of method that micro heat pipe is manufactured by reduction-oxidation copper powder |
| CN104374221B (en) * | 2014-11-05 | 2016-10-19 | 上海交通大学 | The heat pipe compound based on metal material and polymeric material or the manufacture method of soaking plate |
| CN105633037A (en) * | 2016-01-08 | 2016-06-01 | 西安交通大学 | Pulsation heat pipe radiating apparatus for cooling chips |
| CN105689717B (en) * | 2016-02-25 | 2018-10-30 | 重庆大学 | A kind of method for manufacturing parts being embedded with capillary structure pipeline |
| CN105841529A (en) * | 2016-03-31 | 2016-08-10 | 苏州德川环保科技有限公司 | Manufacturing method for nano heat pipe |
| WO2018161462A1 (en) * | 2017-03-08 | 2018-09-13 | 华为技术有限公司 | Flat plate heat pipe, micro-channel heat dissipation system and terminal |
| WO2019131790A1 (en) * | 2017-12-28 | 2019-07-04 | 古河電気工業株式会社 | Heat pipe |
| CN111906312B (en) * | 2020-07-08 | 2022-06-14 | 广东工业大学 | Method for preparing flexible liquid absorption core by laser-induced reduction sintering of copper oxide ink |
| CN112267047B (en) * | 2020-10-26 | 2022-04-12 | 北京酷捷科技有限公司 | Copper alloy with capillary core structure on surface and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1506202A (en) * | 1976-03-16 | 1978-04-05 | Secr Defence | Heat pipes |
| CN2354102Y (en) * | 1998-12-29 | 1999-12-15 | 中国科学院低温技术实验中心 | Filler-type integrated heat-conductive heat-exchanger |
| JP2001336890A (en) * | 2000-05-26 | 2001-12-07 | Natl Inst Of Advanced Industrial Science & Technology Meti | Heat transfer device |
| CN1435669A (en) * | 2002-01-30 | 2003-08-13 | 三星电机株式会社 | Heat pipe and mfg. method thereof |
-
2003
- 2003-12-13 CN CNB2003101174604A patent/CN1318818C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1506202A (en) * | 1976-03-16 | 1978-04-05 | Secr Defence | Heat pipes |
| CN2354102Y (en) * | 1998-12-29 | 1999-12-15 | 中国科学院低温技术实验中心 | Filler-type integrated heat-conductive heat-exchanger |
| JP2001336890A (en) * | 2000-05-26 | 2001-12-07 | Natl Inst Of Advanced Industrial Science & Technology Meti | Heat transfer device |
| CN1435669A (en) * | 2002-01-30 | 2003-08-13 | 三星电机株式会社 | Heat pipe and mfg. method thereof |
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| CN1627031A (en) | 2005-06-15 |
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Granted publication date: 20070530 Termination date: 20161213 |