CN100395504C - Porous structure layer for heat pipe and its making process - Google Patents
Porous structure layer for heat pipe and its making process Download PDFInfo
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- CN100395504C CN100395504C CNB2005100330178A CN200510033017A CN100395504C CN 100395504 C CN100395504 C CN 100395504C CN B2005100330178 A CNB2005100330178 A CN B2005100330178A CN 200510033017 A CN200510033017 A CN 200510033017A CN 100395504 C CN100395504 C CN 100395504C
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Abstract
The present invention relates to a porous structure layer of a heat pipe, which comprises a plurality of layers of silk screens arranged along the radial direction of the heat pipe, wherein a multi-segment type structure is formed by at least one layer of silk screen along the axial direction of the heat pipe, and pore sizes of at least two segments of silk screens in the multi-segment type structure are different. The manufacture method of the porous structure layer of a heat pipe comprises the following steps: step 1, a needed flaky silk screen is provided, and the flaky silk screen comprises a plurality of kinds of different pore spaces; step 2, the flaky silk screen is coiled into a cylindrical silk screen; step 3, the cylindrical silk screen is arranged into the pipe body of the heat pipe; step 4, the silk screens are fixed into the pipe body. The present invention is made into a multi-layer and multi-segment type silk screen structure, and thus, stereoscopic gradient pore change is formed, and simultaneously higher capillary force and lower reflowing resistance are obtained further to enhance the performance of the heat pipe.
Description
[technical field]
The present invention is relevant with heat pipe, refers to a kind of porous structure layer for heat pipe and manufacture method thereof especially.
[background technology]
Along with large scale integrated circuit continuous advancement in technology and extensive use, the development of information industry is advanced by leaps and bounds, and the high-frequency high-speed processor is constantly released.Because making, high-frequency high-speed operation produces a large amount of heats in the processor unit interval, to cause the rising of processor self temperature as these heats of untimely eliminating, to being that the safety and the performance of system makes a big impact, the essential problem that solves when at present heat dissipation problem has become high speed processor of new generation and releases.
Because radiating requirements is improved constantly, new-type heat abstractor constantly occurs.It is exactly wherein a kind of that heat pipe is applied to the electronic building brick heat radiation, temperature remained unchanged and can absorb or emit the principle work of a large amount of heats when it utilized liquid to change between gas, liquid binary states, changed the traditional heat-dissipating device limited situation of efficient with the heat radiation of metal fever conduction pattern merely.Heat pipe is the liquid that an amount of heat of vaporization height of splendid attire, good fluidity, chemical property are stable in a sealing low pressure tubular shell, boiling point is lower, as water, ethanol, acetone etc., utilize this liquid to be heated and cool off and when between gas, liquid binary states, changing, absorb or emit a large amount of heats and make heat pass to the other end rapidly by body one end.
Generally on the heat pipe internal face, porous structure layer is set, produces capillary force by this porous structure layer and drive condensed liquid backflow.And because capillary force and porous structure layer pore size are inversely proportional to, promptly the more little capillary force of the diameter of hole is big more, and therefore for to reach bigger capillary force, the aperture of employed porous material layer hole is the smaller the better.Yet because fluid aperture by runner in flow process is more little, frictional resistance that fluid is suffered and viscous force are big more, and the resistance that therefore makes liquid reflux increases, flow velocity diminishes.When the heat pipe heat absorbing end absorbed heat and increases, evaporation was accelerated, and liquid is because backflow resistance and speed reduces can't replenish the evaporating liquid of heat absorbing end rapidly.Cause dry combustion method easily, damage heat pipe.Therefore the pore size of porous structure layer for heat pipe and the performance that distribution of pores directly influences heat pipe have the porous structure layer that changes hole so hope can provide, and utilize hole to change and promote properties of hot pipe.
[summary of the invention]
Technical problem to be solved by this invention provides a kind of porous structure layer for heat pipe that three-dimensional gradient-porosity changes that has.
A kind of porous structure layer for heat pipe, this porous structure layer is made of silk screen, this porous structure layer radially forms the internal layer silk screen from inside to outside successively along heat pipe, middle level silk screen and outer silk screen, one deck is different with the pore-size distribution of other two-layer hole arbitrarily in this three layers structure, this middle level silk screen is along the axial evaporation ends corresponding to heat pipe of heat pipe, adiabatic section and condensation end form three stage structure, in this three stage structure any one section different with other hole of two sections, this internal layer silk screen and outer silk screen are the one-part form structure, the aperture minimum of internal layer silk screen, the aperture maximum of outer silk screen.
A kind of porous structure layer for heat pipe, this porous structure layer is made of silk screen, this porous structure layer radially forms internal layer silk screen, middle level silk screen and outer silk screen from inside to outside successively along heat pipe, one deck is different with the pore-size distribution of other two-layer hole arbitrarily in this three layers structure, this internal layer silk screen forms three stage structure corresponding to evaporation ends, adiabatic section and the condensation end of heat pipe, in this three stage structure any one section different with other hole of two sections, the hole maximum of wherein corresponding heat pipe evaporation ends, the hole minimum of corresponding heat pipe condensation end.
The present invention changes thereby form three-dimensional gradient-porosity by multilayer multisection type screen net structure, reaches higher capillary force and low backflow resistance simultaneously, and then promotes properties of hot pipe.
[description of drawings]
Fig. 1 is a heat pipe schematic cross-section vertically.
Fig. 2 is another embodiment of heat pipe schematic cross-section vertically.
Fig. 3 is the another embodiment of a heat pipe schematic cross-section vertically.
Fig. 4 is a heat pipe embodiment schematic cross-section vertically again.
Fig. 5 is a porous structure layer for heat pipe manufacture method flow chart of the present invention.
Fig. 6 inserts the preceding porous structure layer schematic diagram of body.
Fig. 7 is that the porous structure layer volume is located at the pull bar schematic diagram.
Fig. 8 is the schematic diagram that porous structure layer and pull bar are inserted body.
Fig. 9 adopts fixedly porous structure layer schematic diagram of elastic support.
[specific embodiment]
With reference to the accompanying drawings, the invention will be further described in conjunction with the embodiments.
As shown in Figure 1, heat pipe 10 of the present invention comprises a body 20, the porous structure layer 30 that closely contacts with these body 20 internal faces and be filled in hydraulic fluid in the body 20.
One end of heat pipe 10 is the evaporation ends 70 of heat pipe 10, the other end is the condensation end 90 of heat pipe 10, establish between this condensation end 90 and the evaporation ends 70 one with the extraneous adiabatic section 80 that does not have heat exchange substantially, the length of the evaporation ends 70 of this heat pipe 10, adiabatic section 80, condensation end 90 can be set according to actual needs, and the length of the evaporation ends 70 of heat pipe, adiabatic section 80, condensation end 90 about equally in the present embodiment.
Every layer of silk screen forms three stage structures, the mesh difference of every layer of each section of silk screen, i.e. the pore size difference of every layer of each section of silk screen corresponding to evaporation ends 70, adiabatic section 80, the condensation end 90 of heat pipe 10.
Internal layer silk screen 40 forms an internal layer evaporator section 47, an internal layer adiabatic section 48, an internal layer condensation segment 49 respectively corresponding to evaporation ends 70, adiabatic section 80, condensation end 90 positions of heat pipe 10, the hole maximum of internal layer evaporator section 47, the hole minimum of internal layer condensation segment 49, the pore size of internal layer adiabatic section 48 is between internal layer evaporator section 47 and internal layer condensation segment 49.
Middle level silk screen 50 forms a middle level evaporator section 57, adiabatic section, a middle level 58, a middle level condensation segment 59 respectively corresponding to evaporation ends 70, adiabatic section 80, condensation end 90 positions of heat pipe 10, the hole maximum of middle level condensation segment 59, the hole minimum of adiabatic section, middle level 58, the pore size of middle level evaporator section 57 is between adiabatic section, middle level 58 and middle level condensation segment 59.
Its hole difference of corresponding heat pipe 10 each sections of above-mentioned each silk screen layer, thus each layer silk screen is along the pore structure of the axial formation graded of heat pipe.
Simultaneously, evaporation ends 70 positions of corresponding heat pipe 10 form internal layer evaporator section 47, an aperture of aperture maximum middle level evaporator section 57 placed in the middle, the outer evaporator section 67 of an aperture minimum along the porous structure layer radially outward 30 of heat pipe 10.
80 positions, adiabatic section of corresponding heat pipe 10 form secondary insulation section 68, the adiabatic section, middle level 58 of an aperture minimum, the internal layer adiabatic section 48 placed in the middle, an aperture of an aperture maximum along the porous structure layer radially outward 30 of heat pipe 10.
Thereby corresponding each section of each layer silk screen forms different holes, promptly forms the distribution of pores of graded along radially each layer silk screen of heat pipe 10.Because this porous structure layer 30 forms and radially reaches the hole that axially is three-dimensional graded along heat pipe, during heat pipe 10 work, utilize the three-dimensional graded of porous structure layer 30 holes to adjust heat pipe character, reach the effect of capillary high pressure difference and low flow resistance, promote the performance of heat pipe 10.
Be appreciated that ground, porous structure layer 30 is not limited to above-mentioned embodiment, as shown in Figure 2, the porous structure layer 230 of heat pipe 210 comprises the internal layer silk screen 240 that is provided with along the layering radially outward of heat pipe 210, middle level silk screen 250 and outer silk screen 260, wherein internal layer silk screen 240 constitutes by the less silk screen of hole, outer silk screen 260 constitutes by the bigger silk screen of hole, only in the evaporation ends 270 of middle level silk screen 250 corresponding heat pipes 210, adiabatic section 280, condensation end 290 forms the different three stage structure of pore size, thereby at the axial pore structure that all constitutes graded of radially reaching of heat pipe 210.Can set the number of plies of silk screen and the size distribution of hole as required during practical application, as long as porous structure layer comprises two-layer above screen net structure, wherein one deck silk screen has the distribution of pores that varies in size can form three-dimensional graded in heat pipe pore structure.
In addition, thickness of the above each layer of porous structure layer and length are all about equally, in fact can design the thickness and the length of each layer of porous structure layer as required, as shown in Figures 3 and 4, in the porous structure layer 330 of heat pipe 310 shown in Figure 3, internal layer silk screen 340 thickness minimums, middle level silk screen 350 thickness maximums, outer silk screen 360 thickness occupy between internal layer silk screen 340 and the outer silk screen 350, the evaporation ends 470 of the porous structure layer 430 corresponding heat pipes 410 of heat pipe 410 shown in Figure 4, adiabatic section 480, condensation end 490 forms the three stage structure that is uneven in length, evaporation ends 470, the length of condensation end 490 is greater than the length of adiabatic section 480.
Fig. 5 is the porous structure layer 30 manufacture method flow charts of heat pipe 10 of the present invention, this manufacture method may further comprise the steps: required sheet silk screen at first is provided, secondly the sheet silk screen is rolled into tubular silk screen 30 "; then with tubular silk screen 30 " insert in the body 20 of heat pipe 10, at last with tubular silk screen 30 " be fixed in and form porous structure layers 30 in the body 20.Introduce the manufacture method of porous structure layer for heat pipe of the present invention in detail below in conjunction with Fig. 6 to Fig. 8.
At first, volume is established and is formed tubular silk screen 30 ".
The sheet silk screen of nine single holes at first is provided in this process, and wherein three pull spring netting gears have less pore structure, and three pull spring netting gears have bigger pore structure, and it is aforementioned between the two that other three pore sizes occupy.Choosing the silk screen of three different aperture arranges by order from big to small, and by being combined as a whole that spot welding or wiring or binding agent make, the silk screen of choosing three different aperture then in addition is little by hole, greatly, in order arrange, what make equally is combined as a whole, residue three is thrown the net order by in the hole, little, big order is arranged and is combined as a whole, with said fixing is that the mesh of one is successively arranged, last by spot welding or wiring or binding agent described nine pull spring anastomoses are integrated once more promptly to form sheet silk screen 30 ', as shown in Figure 6 with three-dimensional gradient-porosity.
As shown in Figure 7, one pull bar 100 is provided then, this pull bar 100 is the rounded solid hard barred body of a cross section, as the stainless steel barred body, be appreciated that ground, the shape of cross section of pull bar 100 also can be other shapes such as ellipse, square, triangle, and its concrete shape can be decided according to the shape of cross section of body 20.Then sheet silk screen 30 ' is established along the outer surface volume of pull bar 100 and formed tubular silk screen 30 ".
Aforesaid way is the silk screen that many differences have a single mesh to be combined as a whole establish along pull bar 100 volumes then, is appreciated that ground, the silk screen that also described many differences can be had a single mesh one by one gradation successively roll up along pull bar 100 establish formation tubular silk screen 30 ".
In addition, also can directly form the required whole pull spring net that three-dimensional gradient-porosity changes that has by the mode of braiding, volume is located on the pull bar 100 then, in like manner can form individual layer silk screen by modes such as braidings with graded hole, then successively volume be located at pull bar 100 or with different individual layer silk screens folded mutually establish form one after volume be located at pull bar 100, also can form and have the multi-layer silk screen section that changes pore structure by modes such as braidings, volume is located at pull bar 100 or different silk screen sections is spliced into after the one volume mutually and is located at pull bar 100 piecemeal then, forms tubular silk screen 30 ".
Then, as shown in Figure 8, with tubular silk screen 30 " insert in the lump in the body 10 with pull bar 100.
At last, with above-mentioned tubular silk screen 30 " be fixed in the body 20.
By to inserting tubular silk screen 30 " body 20 heat, make tubular silk screen 30 " produce partial melting, partial melting makes tubular silk screen 30 by this " combine with tube wall, thereby form as shown in Figure 1 porous structure layer 30.Can be in this process with pull bar 100 in the preceding taking-up of heating, also can waiting heats finish after again pull bar 100 is taken out.
In addition, also can utilize an elastic support 300 with tubular silk screen 30 " fixing.As shown in Figure 9, to inserting tubular silk screen 30 " body 20; pull bar 100 is taken out; provide an elastic support 300 as helical spring etc. then; this elastic support 300 is placed in the heat pipe 10; make tubular silk screen 30 " place between body 20 and the elastic support 300, thereby provide elastic acting force to make tubular silk screen 30 by the distortion of elastic support 300 " thereby more closely contact formation porous structure layer 30 as shown in Figure 1 with the internal face of body 20.
Establish in the process at above-mentioned volume, variant silk screen is carried out different arrangements can obtain the different distributions porous structure layer, if adopt the silk screen of different-thickness or length can obtain as Fig. 3 or porous structure layer 330 and 430 shown in Figure 4, in addition, by weaving the porous structure layer that also can directly obtain different distributions, the length of its each hole section, thickness and arrangement all can be decided as required.
After the making of finishing above-mentioned porous structure layer 30, vacuumize and seal to body 20 filling hydraulic fluids and to body 20, can obtain heat pipe 10.
Claims (6)
1. porous structure layer for heat pipe, this porous structure layer is made of silk screen, this porous structure layer radially forms internal layer silk screen, middle level silk screen and outer silk screen from inside to outside successively along heat pipe, it is characterized in that: this middle level silk screen forms three stage structure along axial evaporation ends corresponding to heat pipe, adiabatic section and the condensation end of heat pipe, in this three stage structure any one section different with other hole of two sections, this internal layer silk screen and outer silk screen are the one-part form structure, the aperture minimum of internal layer silk screen, the aperture maximum of outer silk screen.
2. porous structure layer for heat pipe as claimed in claim 1, it is characterized in that: the hole maximum of the corresponding heat pipe of this middle level silk screen adiabatic section, between the hole that the hole minimum of corresponding condensation end, the pore size of corresponding evaporation ends occupy corresponding adiabatic section and the hole of corresponding condensation end.
3. porous structure layer for heat pipe, this porous structure layer is made of silk screen, this porous structure layer radially forms internal layer silk screen, middle level silk screen and outer silk screen from inside to outside successively along heat pipe, it is characterized in that: this internal layer silk screen forms three stage structure along axial evaporation ends corresponding to heat pipe, adiabatic section and the condensation end of heat pipe, in this three stage structure any one section different with other hole of two sections, the hole maximum of wherein corresponding heat pipe evaporation ends, the hole minimum of corresponding heat pipe condensation end.
4. porous structure layer for heat pipe as claimed in claim 3, it is characterized in that: this middle level silk screen and outer silk screen are corresponding to the evaporation ends of heat pipe, the adiabatic section all forms the different three stage structure of pore size with condensation end, the hole maximum of the corresponding heat pipe condensation end of middle level silk screen wherein, the hole minimum of corresponding heat pipe adiabatic section, the hole of corresponding evaporation ends is placed in the middle, the hole maximum of the corresponding heat pipe of outer silk screen adiabatic section, the hole minimum of corresponding heat pipe evaporation ends, the hole of corresponding condensation end is placed in the middle, thereby axial each layer silk screen along heat pipe all forms the different three stage structure of pore size, along heat pipe radially corresponding to the evaporation ends of heat pipe, the adiabatic section all forms the different three layers structure of pore size with each section silk screen of condensation end.
5. porous structure layer for heat pipe as claimed in claim 4, it is characterized in that: this internal layer silk screen, middle level silk screen are different with the thickness of outer silk screen, this internal layer screen thickness minimum wherein, middle level screen thickness maximum, outer screen thickness occupy between internal layer silk screen and the middle level silk screen.
6. porous structure layer for heat pipe as claimed in claim 4 is characterized in that: the length difference of this internal layer silk screen three stage structure, the length of corresponding heat pipe adiabatic section is less than the length of corresponding evaporation ends, condensation end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100330178A CN100395504C (en) | 2005-01-24 | 2005-01-24 | Porous structure layer for heat pipe and its making process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100330178A CN100395504C (en) | 2005-01-24 | 2005-01-24 | Porous structure layer for heat pipe and its making process |
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| Publication Number | Publication Date |
|---|---|
| CN1811327A CN1811327A (en) | 2006-08-02 |
| CN100395504C true CN100395504C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100330178A Expired - Fee Related CN100395504C (en) | 2005-01-24 | 2005-01-24 | Porous structure layer for heat pipe and its making process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090562A (en) * | 2013-02-06 | 2013-05-08 | 济南道生一新能源科技有限公司 | Flat-plate heat pipe solar collector |
| CN103925819A (en) * | 2013-02-17 | 2014-07-16 | 上海交通大学 | Through-hole metal foam heat pipe heat exchanger with gradually-changed appearance characteristics |
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|---|---|---|---|---|
| CN104215110B (en) * | 2014-09-03 | 2016-07-27 | 华北电力大学 | A kind of dropwise condensation intensified condenser tube with gradient capillary wick |
| CN108507384A (en) * | 2018-04-02 | 2018-09-07 | 南京航空航天大学 | A kind of two-dimensional gradient hole composite wick and preparation method thereof |
| CN109489461B (en) * | 2018-12-06 | 2023-10-13 | 重庆大学 | Dust removal and heat exchange integrated device and method based on gradient honeycomb body and three-dimensional ribbed tube |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3754594A (en) * | 1972-01-24 | 1973-08-28 | Sanders Associates Inc | Unilateral heat transfer apparatus |
| US3786861A (en) * | 1971-04-12 | 1974-01-22 | Battelle Memorial Institute | Heat pipes |
| SU1038790A1 (en) * | 1981-09-07 | 1983-08-30 | Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им.Акад.С.П.Королева | Capillary structure of heat pipe |
| SU1495627A1 (en) * | 1987-07-06 | 1989-07-23 | Белорусское республиканское научно-производственное объединение порошковой металлургии | Method of manufacturing capillary porous structure of heat pipe |
| US6460612B1 (en) * | 2002-02-12 | 2002-10-08 | Motorola, Inc. | Heat transfer device with a self adjusting wick and method of manufacturing same |
| CN1401967A (en) * | 2001-08-28 | 2003-03-12 | 财团法人工业技术研究院 | Method for installing copper net for capillarity making in mfg. heat pipe |
| CN1435669A (en) * | 2002-01-30 | 2003-08-13 | 三星电机株式会社 | Heat pipe and mfg. method thereof |
-
2005
- 2005-01-24 CN CNB2005100330178A patent/CN100395504C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3786861A (en) * | 1971-04-12 | 1974-01-22 | Battelle Memorial Institute | Heat pipes |
| US3754594A (en) * | 1972-01-24 | 1973-08-28 | Sanders Associates Inc | Unilateral heat transfer apparatus |
| SU1038790A1 (en) * | 1981-09-07 | 1983-08-30 | Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им.Акад.С.П.Королева | Capillary structure of heat pipe |
| SU1495627A1 (en) * | 1987-07-06 | 1989-07-23 | Белорусское республиканское научно-производственное объединение порошковой металлургии | Method of manufacturing capillary porous structure of heat pipe |
| CN1401967A (en) * | 2001-08-28 | 2003-03-12 | 财团法人工业技术研究院 | Method for installing copper net for capillarity making in mfg. heat pipe |
| CN1435669A (en) * | 2002-01-30 | 2003-08-13 | 三星电机株式会社 | Heat pipe and mfg. method thereof |
| US6460612B1 (en) * | 2002-02-12 | 2002-10-08 | Motorola, Inc. | Heat transfer device with a self adjusting wick and method of manufacturing same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090562A (en) * | 2013-02-06 | 2013-05-08 | 济南道生一新能源科技有限公司 | Flat-plate heat pipe solar collector |
| CN103925819A (en) * | 2013-02-17 | 2014-07-16 | 上海交通大学 | Through-hole metal foam heat pipe heat exchanger with gradually-changed appearance characteristics |
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| CN1811327A (en) | 2006-08-02 |
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