CN1928484A - Heat pipe and method for manufacturing same - Google Patents

Heat pipe and method for manufacturing same Download PDF

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Publication number
CN1928484A
CN1928484A CN 200510037132 CN200510037132A CN1928484A CN 1928484 A CN1928484 A CN 1928484A CN 200510037132 CN200510037132 CN 200510037132 CN 200510037132 A CN200510037132 A CN 200510037132A CN 1928484 A CN1928484 A CN 1928484A
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China
Prior art keywords
cavity
heat pipe
shell
working fluid
capillary wick
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Granted
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CN 200510037132
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Chinese (zh)
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CN100529636C (en
Inventor
张俊毅
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CNB2005100371322A priority Critical patent/CN100529636C/en
Publication of CN1928484A publication Critical patent/CN1928484A/en
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Publication of CN100529636C publication Critical patent/CN100529636C/en
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Abstract

The invention relates to a heat pipe, comprising tube shell with a first cavity and a second cavity, wherein the first and second cavities are set along the axis of heat pipe in parallel; working fluid in the first cavity; and working fluid in the second cavity. Because there is different working temperature range in the first and second cavities the whole temperature range is increased so that the heat pipe is applied in the heat dissipation circumstance with larger variation range.

Description

Heat pipe and preparation method thereof
[technical field]
The present invention relates to the heat conduction field, relate in particular to a kind of heat pipe and preparation method thereof.
[background technology]
Heat pipe is the heat conducting element 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.
See also Fig. 1, gravity type heat pipe 10 is made up of shell 11 and the working fluids 13 that are sealed in the shell 11.Heat pipe 10 1 ends are evaporator section 10a (bringing-up section), and the other end is condensation segment 10b (cooling section).Heat pipe 10 is vertical usually or from the horizontal by the certain angle placement, evaporator section 10a is following, and condensation segment 10b is last.Heat at evaporator section 10a, working fluid 13 absorbs heat 15 gasifications and is steam 14, under small pressure reduction, rise to condensation segment 10b, and emit heat 15 to the external world, be condensed into liquid, under the gravity effect, turn back to evaporator section 10a and the gasification of being heated once more, so move in circles, continuously heat 15 is passed to condensation segment 10b by evaporator section 10a.
See also Fig. 2, the heat pipe 20 with capillary wick is made up of shell 21, capillary wick 22 and the working fluids 23 that are sealed in the shell 21.One end of heat pipe 20 is evaporator section 20a (bringing-up section), and the other end is condensation segment 20b (cooling section), can arrange the adiabatic section between evaporator section 20a and condensation segment 20b according to application need.Working fluid 23 evaporations form steam 24 in the capillary wick 22 when heat pipe 20 evaporator section 20a are heated, steam 24 is at the dirty condensation segment 20b to heat pipe 20 of slight pressure effect, condense into working fluid 23 and emit heat 25, working fluid 23 flows back to evaporator section 20a by capillarity along capillary wick 22 again.So circulation, heat 25 constantly reaches condensation segment 20b by the evaporator section 20a of heat pipe 20, and the low-temperature receiver of the section of being condensed 20b one end absorbs.
The operating temperature of general heat pipe is to control in the mode of control valve internal pressure.With water is example, and the boiling point of water is 100 degrees centigrade (100 ℃) during 1 atmospheric pressure (1atm), and along with air pressure reduces, the boiling point of water also can reduce.General is that the operating temperature of heat pipe of working fluid is all below 100 ℃, so the pressure in the heat pipe pipe all will be extracted into less than 1atm with water.When temperature was higher than the temperature of heat pipe setting when work, the working fluid in the heat pipe just can all flash to gas and can't be with heat; Otherwise, when operating temperature is lower than the design temperature of heat pipe, then can causes working fluid to evaporate, thereby can't take away heat.If be easy to cause heat pipe failure so the operating temperature range of heat pipe is urinated very much.
Therefore, be necessary to provide a kind of heat pipe and manufacture method thereof that can realize big operating temperature range.
[summary of the invention]
Below, will a kind of heat pipe that can realize big operating temperature range be described with some embodiment.
And the preparation method that a kind of heat pipe is described by these embodiment.
For realizing foregoing, present embodiment provides a kind of heat pipe, comprises that one has the shell of first cavity and second cavity, and this second cavity and above-mentioned first cavity are along the axially parallel setting of heat pipe; Be sealed with first working fluid in first cavity, be sealed with second working fluid in second cavity.
Described heat pipe also can further comprise first capillary wick of being close to first cavity inner wall and second capillary wick of being close to second cavity inner wall.
For realizing foregoing, present embodiment also provides a kind of preparation method of heat pipe, may further comprise the steps:
Formation one has the shell of first cavity and second cavity;
With shell one end closure, and first cavity and second cavity taken out low pressure respectively;
Fill first working fluid and second working fluid to first cavity and second cavity respectively;
The shell other end is sealed.
Described formation shell step and shell one end closure are also taken out respectively first cavity and second cavity and to be comprised the following steps: also between the low pressure steps that the inwall of being close to first cavity forms first capillary wick, and the inwall of being close to second cavity forms second capillary wick.
With respect to the heat pipe of prior art, the working fluid in first cavity of the heat pipe that present embodiment provides and second cavity is separate, and air pressure is also separate, so only need a heat pipe just can reach the function of two heat pipes, makes the range of application of heat pipe wider.In addition,, the operating temperature range of whole heat pipe is increased, make heat pipe can be used in the bigger heat dissipation environment of range of temperature because above-mentioned first cavity is different with the operating temperature range of second cavity.
[description of drawings]
Fig. 1 is the gravity type heat pipe operation principle schematic diagram of prior art.
Fig. 2 is the heat pipe operation principle schematic diagram of the tool capillary wick of prior art.
Fig. 3 is a first embodiment of the invention heat pipe operation principle schematic diagram.
Fig. 4 is a first embodiment of the invention inside heat pipe structure radial section schematic diagram.
Fig. 5 is a second embodiment of the invention heat pipe operation principle schematic diagram.
Fig. 6 is a second embodiment of the invention inside heat pipe structure radial section schematic diagram.
Fig. 7 is preparation method's flow chart of first embodiment of the invention heat pipe.
[specific embodiment]
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 3, the heat pipe 30 that first embodiment of the invention provided comprises shell 31, first working fluid 33, second working fluid 33 '.
Shell 31 is generally copper pipe, also can adopt different materials according to different needs, as aluminium, carbon steel, stainless steel, iron, nickel, titanium etc. and alloy thereof.Shell 31 has the hollow structure of first cavity 37 and second cavity 37 ', and this first cavity 37 and second cavity 37 ' are along the axially parallel setting of heat pipe 30.
First working fluid 33 is sealed in first cavity 37, and second working fluid 33 ' is sealed in second cavity 37 '.First working fluid 33 and second working fluid 33 ' comprise water, acetone or heptane etc.According to actual needs, the material of first working fluid 33 and second working fluid 33 ' can be identical, also can be different.
The operation principle of the operation principle of heat pipe 30 and prior art heat pipe 10 is basic identical, and wherein the evaporator section of heat pipe 30 is 30a, and condensation segment is 30b; Heat pipe 30 absorbs and emits heat is 35; First working fluid 33 and second working fluid 33 ' are subjected to thermal evaporation to form steam 34 and 34 '.
First cavity 37 is different with the operating temperature range of second cavity 37 ', and when heat source temperature was in first cavity, 37 operating temperature ranges, first cavity 37 worked in heat pipe 30; When heat source temperature was in second cavity, 37 ' operating temperature range, second cavity 37 ' worked in heat pipe 30; When having, the operating temperature range of first cavity 37 and second cavity 37 ' intersects, and when heat source temperature was in the operating temperature range cross section of first cavity 37 and second cavity 37 ', first cavity 37 and second cavity 37 ' will concur in heat pipe 30.
Seeing also Fig. 4, is present embodiment heat pipe 30 internal structure radial section schematic diagrames.
Shell 31 peripheral radial sections are shaped as ellipse, rectangle or triangle, can be other shapes according to actual needs also, are not limited to the shape that the embodiment of the invention provides, and present embodiment shell 31 peripheral radial sections are shaped as ellipse.
The radial section of first cavity 37 and second cavity 37 ' is shaped as standard circular, ellipse, rectangle or triangle etc., can be other shapes according to actual needs also, is not limited to the shape that the embodiment of the invention provides.According to actual needs, the radial section shape of first cavity 37 and second cavity 37 ' can be identical, also can be different.The radial section shape of present embodiment first cavity 37 and second cavity 37 ' is all standard circular.
Gravity type heat pipe with respect to prior art, the heat pipe 30 that present embodiment provided has the hollow structure of first cavity 37 and 37 ' two cavitys of second cavity, two cavity internal gas pressures can separately be controlled, working fluid is also separate, so the operating temperature range of two cavitys just can be different, two operating temperature ranges can be intersected, can not intersect yet, make the operating temperature range of whole heat pipe 30 increase, the range of application of heat pipe 30 is wider, and can be used for the bigger heat dissipation environment of range of temperature.
In addition, because first cavity 37 and second cavity 37 ' of heat pipe 30 are separate, intersect when the operating temperature range of first cavity 37 and second cavity 37 ' has, and the thermal source operating temperature range is when being within this crossover range again, a heat pipe 30 just can reach the function of two heat pipes.
See also Fig. 5, the heat pipe 40 that second embodiment of the invention provided comprises shell 41, first capillary wick 42, second capillary wick 42 ', first working fluid 43, second working fluid 43 '.
Shell 41 is structure as a whole, and it has the hollow structure of first cavity 47 and second cavity 47 '.Shell 31 among shell 41, first cavity 47, second cavity 47 ', first working fluid 43, second working fluid 43 ' and first embodiment, first cavity 37, second cavity 37 ', first working fluid 33, second working fluid 33 ' are corresponding identical.
First capillary wick 42 and second capillary wick 42 ' are close to first cavity, 47 inwalls and second cavity, 47 ' inwall respectively, and both can be groove-shaped, silk screen type or slug type etc.First capillary wick 42 and second capillary wick 42 ' can be same type according to actual needs, also can be dissimilar.
The operation principle of the heat pipe 20 of the tool capillary wick of the operation principle of heat pipe 40 and prior art is basic identical, and wherein the evaporator section of heat pipe 40 is 40a, and condensation segment is 40b; Heat pipe 40 absorbs and emits heat is 45; First working fluid 43 and second working fluid 43 ' are subjected to thermal evaporation to form steam 44 and 44 '.
First cavity 47 is different with the operating temperature range of second cavity 47 ', and when heat source temperature was in first cavity, 47 operating temperature ranges, first cavity 47 worked in heat pipe 40; When heat source temperature was in second cavity, 47 ' operating temperature range, second cavity 47 ' worked in heat pipe 40; When having, the operating temperature range of first cavity 47 and second cavity 47 ' intersects, and when heat source temperature was in the operating temperature range cross section of first cavity 47 and second cavity 47 ', first cavity 47 and second cavity 47 ' will concur in heat pipe 40.
Seeing also Fig. 6, is present embodiment heat pipe 40 internal structure radial section schematic diagrames.The radial section shape of peripheral shape, first cavity 37 and second cavity 37 ' of shell 31 is corresponding identical respectively among the radial section shape of the peripheral shape of shell 41, first cavity 47 and second cavity 47 ' and first embodiment.Difference is, first capillary wick 42 and second capillary wick 42 ' are close to the inwall of first cavity 47 and second cavity 47 ' respectively, and first capillary wick 42 that present embodiment provided and the radial section shape of second capillary wick 42 ' are all circular.
Heat pipe with respect to prior art tool capillary wick, the heat pipe 40 that present embodiment provided has the hollow structure of first cavity 47 and 47 ' two cavitys of second cavity, two cavity internal gas pressures can separately be controlled, working fluid is also separate, so the operating temperature range of two cavitys just can be different, two operating temperature ranges can be intersected, can not intersect yet, make the operating temperature range of whole heat pipe 40 increase, the range of application of heat pipe 40 is wider, and can be used for the bigger heat dissipation environment of range of temperature.
In addition, because first cavity 47 and second cavity 47 ' of heat pipe 40 are separate, intersect when the operating temperature range of first cavity 47 and second cavity 47 ' has, and the thermal source operating temperature range is when being within this crossover range again, a heat pipe 40 just can reach the function of two heat pipes.
Seeing also Fig. 7, is preparation method's flow chart of the heat pipe 30 that provides of first embodiment of the invention.Below in conjunction with Fig. 3 this method is described.
Step 1, formation one has the shell 31 of two cavitys.Two cavitys are respectively first cavity 37 and second cavity 37 ', along heat pipe 30 axially parallel settings.Shell 31 comprises copper pipe, aluminum pipe, steel pipe, stainless steel tube, iron pipe, nickel pipe, titanium pipe or its compo pipe etc.First cavity 37 and second cavity, 37 ' radial section all can be standard circular, also can ellipse, rectangle, triangle etc., and the radial section of first cavity 37 and second cavity 37 ' can be the same or different, and present embodiment both adopts standard circular; Shell 31 peripheral radial sections can be ellipse, rectangle or triangle etc., and present embodiment adopts oval.Preferably, shell 31 adopts extruding-out process to form.
Step 2 with shell 31 1 end closures, and is taken out low pressure respectively to first cavity 37 and second cavity 37 '.First cavity 37 and second cavity 37 ' have the control of independently bleeding respectively, use so that two cavitys reach two different operating temperature ranges.
Step 3 is filled working fluid to first cavity 37 and second cavity 37 ' respectively.This working fluid comprises water, acetone or heptane etc.Fill first working fluid 33 in first cavity 37; Fill second working fluid 33 ' in second cavity 37 '.First working fluid 33 and second working fluid 33 ' can be the same or different, and present embodiment both adopts water.
Step 4 is sealed shell 31 other ends, thereby forms Fig. 3 and heat pipe 30 shown in Figure 4.
Should point out that above-mentioned preparation method can change sequence of steps according to actual needs, in step 2 and step 3, can fill working fluid to first cavity 37 and second cavity 37 ' respectively then earlier with shell 31 1 end closures, again first cavity 37 and second cavity 37 ' be taken out low pressure respectively.
The present invention also provides the preparation method of the second embodiment heat pipe 40, the preparation method of itself and heat pipe 30 is basic identical, shell 41, first working fluid 43, second working fluid 43 ' are identical respectively with the preparation method of shell 31, first working fluid 33, second working fluid 33 ', the sealing two ends of the sealing two ends of heat pipe 40 and the method for taking out low pressure and heat pipe 30 and to take out the method for low pressure identical.Difference is to increase between step 1 and the step 2 the following step.
Form first capillary wick 42 and second capillary wick 42 '.First capillary wick 42 and second capillary wick 42 ' all can be silk screen type, groove-shaped or slug type, and first capillary wick 42 and second capillary wick 42 ' all adopt sintering method to form in the present embodiment.
Formation method with first capillary wick 42 is an example; sintering method is roughly as follows: 47 central authorities insert a plug (available stainless steel plug) at first cavity; the decision of plug thickness is steam cavity internal diameter size in the future; in plug and the formed ring-like space of tube wall, insert metallic copper powder to be sintered then; plug is sent into heating furnace with support after fixing; sintering is made an appointment with half an hour under hydrogen shield, and sintering temperature is 810 ℃～880 ℃.Pipe is taken out from stove, extract plug after cooling out, and put into the stove sintering once more about one hour, can obtain a sinter layer at first cavity, 47 inwalls, this sinter layer has capillary structure, can be used as first capillary wick 42.The formation method of second capillary wick 42 ' is identical with the formation method of first capillary wick 42.
Should point out that above-mentioned preparation method can change sequence of steps according to actual needs, can form first capillary wick 42 and second capillary wick 42 ' then earlier with shell 31 1 end closures, again first cavity 47 and second cavity 47 ' is taken out low pressure respectively.
Except that the heat pipe 40 of gravity type heat pipe 30 and tool capillary wick, also have rotating heat pipe and separate heat pipe etc.Above-mentioned rotating heat pipe and separate heat pipe etc. are similar to gravity type heat pipe 30, the imbibition core of no capillary structure in the heat pipe, and working fluid relies on gravity or centrifugal force to reflux during work.Above-mentioned rotating heat pipe and separate heat pipe etc. also can be made the structure of two cavitys, to increase its operating temperature range.
Be appreciated that the present invention can also expand to and has three or three heat pipes with upper cavity, makes the working range of heat pipe further increase, to satisfy actual needs.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims (10)

1. a heat pipe comprises that one has the shell of first cavity, is sealed with first working fluid in this first cavity, it is characterized in that this shell further comprises one second cavity, and this second cavity and this first cavity are along the axially parallel setting of heat pipe; Be sealed with second working fluid in this second cavity.
2. heat pipe as claimed in claim 1 is characterized in that, described heat pipe also comprises first capillary wick of being close to first cavity inner wall and second capillary wick of being close to second cavity inner wall.
3. heat pipe as claimed in claim 1 is characterized in that, described shell material is selected from metal or its alloys such as copper, aluminium, iron, nickel, titanium, carbon steel, stainless steel.
4. heat pipe as claimed in claim 1 is characterized in that, the radial section of described first cavity is standard circular, ellipse, rectangle or triangle, and the radial section of described second cavity is standard circular, ellipse, rectangle or triangle.
5. heat pipe as claimed in claim 1 is characterized in that, the peripheral radial section of described shell is ellipse, rectangle or triangle.
6. heat pipe as claimed in claim 2 is characterized in that, described first capillary wick is groove-shaped, silk screen type or slug type, and described second capillary wick is groove-shaped, silk screen type or slug type.
7. heat pipe as claimed in claim 1 is characterized in that, described first working fluid is selected from a kind of of water, acetone or heptane, and described second working fluid is selected from a kind of of water, acetone or heptane.
8. heat control Preparation Method, it comprises step:
Formation one has the shell of first cavity and second cavity;
With shell one end closure, and first cavity and second cavity taken out low pressure respectively;
Fill first working fluid and second working fluid to first cavity and second cavity respectively;
The shell other end is sealed.
9. heat control Preparation Method as claimed in claim 8, it is characterized in that, described formation shell step and take out respectively with shell one end closure and to first cavity and second cavity and to comprise the following steps: also between the low pressure steps that the inwall of being close to first cavity forms first capillary wick, the inwall of being close to second cavity forms second capillary wick.
10. heat control Preparation Method as claimed in claim 8 is characterized in that, the method that described formation one has the shell of first cavity and second cavity is an extruding-out process.
CNB2005100371322A 2005-09-05 2005-09-05 Heat pipe and method for manufacturing same Expired - Fee Related CN100529636C (en)

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Application Number Priority Date Filing Date Title
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CN1928484A true CN1928484A (en) 2007-03-14
CN100529636C CN100529636C (en) 2009-08-19

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102713787A (en) * 2010-01-26 2012-10-03 惠普发展公司，有限责任合伙企业 Heat sink with multiple vapor chambers
US20130233520A1 (en) * 2012-03-07 2013-09-12 Foxconn Technology Co., Ltd. Flat heat pipe
CN103547113A (en) * 2012-07-10 2014-01-29 宏碁股份有限公司 Heat radiation unit
CN104488371A (en) * 2014-06-04 2015-04-01 华为技术有限公司 Electronic device
CN106403672A (en) * 2016-11-23 2017-02-15 广东合新材料研究院有限公司 Segmented ultra-thin phase-change heat tube and preparation method thereof
CN106705721A (en) * 2017-02-06 2017-05-24 中国航天空气动力技术研究院 Environmental suitability high-temperature heat pipe
CN109900145A (en) * 2019-03-14 2019-06-18 深圳兴奇宏科技有限公司 Equalizing plate structure
CN109945704A (en) * 2019-04-24 2019-06-28 常州恒创热管理有限公司 Multistage plate-type heat-pipe and radiator
TWI681162B (en) * 2019-03-14 2020-01-01 大陸商深圳興奇宏科技有限公司 Vapor chamber structure
WO2024021722A1 (en) * 2022-07-27 2024-02-01 广州力及热管理科技有限公司 Vapor chamber having two-phase flow circulation of different working fluids

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CN106052436A (en) * 2016-06-13 2016-10-26 深圳市华普新能源科技有限公司 Multi-dimensional vacuum degree heat pipe and manufacturing method thereof

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CN1621772A (en) * 2003-11-27 2005-06-01 鸿富锦精密工业（深圳）有限公司 Heat pipe and manufacturing method thereof

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102713787A (en) * 2010-01-26 2012-10-03 惠普发展公司，有限责任合伙企业 Heat sink with multiple vapor chambers
TWI585356B (en) * 2012-03-07 2017-06-01 鴻準精密工業股份有限公司 Plate-type heat pipe
US20130233520A1 (en) * 2012-03-07 2013-09-12 Foxconn Technology Co., Ltd. Flat heat pipe
CN103547113A (en) * 2012-07-10 2014-01-29 宏碁股份有限公司 Heat radiation unit
CN103547113B (en) * 2012-07-10 2017-01-18 宏碁股份有限公司 Heat radiation unit
CN104488371B (en) * 2014-06-04 2017-11-17 华为技术有限公司 A kind of electronic equipment
US10409340B2 (en) 2014-06-04 2019-09-10 Huawei Technologies Co., Ltd. Electronic device
US11789504B2 (en) 2014-06-04 2023-10-17 Huawei Technologies Co., Ltd. Electronic device
CN104488371A (en) * 2014-06-04 2015-04-01 华为技术有限公司 Electronic device
CN107613724A (en) * 2014-06-04 2018-01-19 华为技术有限公司 A kind of electronic equipment
US11144101B2 (en) 2014-06-04 2021-10-12 Huawei Technologies Co., Ltd. Electronic device
CN107613724B (en) * 2014-06-04 2020-04-28 华为技术有限公司 Electronic equipment
CN106403672A (en) * 2016-11-23 2017-02-15 广东合新材料研究院有限公司 Segmented ultra-thin phase-change heat tube and preparation method thereof
CN106705721A (en) * 2017-02-06 2017-05-24 中国航天空气动力技术研究院 Environmental suitability high-temperature heat pipe
TWI681162B (en) * 2019-03-14 2020-01-01 大陸商深圳興奇宏科技有限公司 Vapor chamber structure
CN109900145A (en) * 2019-03-14 2019-06-18 深圳兴奇宏科技有限公司 Equalizing plate structure
US11397056B2 (en) 2019-03-14 2022-07-26 Asia Vital Components (China) Co., Ltd. Vapor chamber structure
CN109945704A (en) * 2019-04-24 2019-06-28 常州恒创热管理有限公司 Multistage plate-type heat-pipe and radiator
WO2024021722A1 (en) * 2022-07-27 2024-02-01 广州力及热管理科技有限公司 Vapor chamber having two-phase flow circulation of different working fluids

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