CN203672209U - Miniature capillary pump ring with capillary wick structure of gradient pore structure - Google Patents
Miniature capillary pump ring with capillary wick structure of gradient pore structure Download PDFInfo
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- CN203672209U CN203672209U CN201420037335.6U CN201420037335U CN203672209U CN 203672209 U CN203672209 U CN 203672209U CN 201420037335 U CN201420037335 U CN 201420037335U CN 203672209 U CN203672209 U CN 203672209U
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Abstract
The utility model discloses a miniature capillary pump ring with a capillary wick structure of a gradient pore structure. The miniature capillary pump ring comprises an evaporator, a condenser, a steam connection pipe, a liquid connection pipe and other components. The evaporator is composed of an evaporating chamber, a wick structure, a liquid compensation chamber and an evaporator shell. The evaporating chamber comprises a steam channel, an evaporator base plate and a steam chamber, wherein the steam channel and the evaporator base plate are integrated, and the steam channel is formed by wire-cutting processing. The capillary wick structure of the gradient pore structure is placed on the steam channel for providing circulating power for the capillary pump ring. Crisscross channels are arranged in the liquid compensation chamber and are tightly connected with the wick structure, and thus working medium is ensured to be uniformly distributed on the wick structure. The condenser is composed of a condenser upper cover, fins, a strengthened condensing structure and the wick structure. The whole capillary pump ring structure is compact in structure, and utilizes the capillary wick structure of the gradient pore structure to provide large capillary force, reduce flow resistance, and speed up the back-flow velocity of the working medium, and thus the heat-transfer capability of the whole structure is greatly improved, and the capillary pump ring structure has a wide application prospect in the field of heat radiation of electronic chips with high power and high heating flux.
Description
Technical field
The utility model relates to a kind of cooling technology, and the especially cooling technology of electronic chip adopts miniature capillary pump ring phase-change heat specifically, is applied to the heat radiation of microelectronic chip.
Background technology
Along with improving constantly of electronic chip integrated level, the original paper quantity of holding on ultra-large one single chip is more and more, up to more than 100,000.So high integrated level, certainly will cause the caloric value of chip sharply to increase, and the heat flow density of processor is with up to 10 at present
6w/m
2, therefore, heat radiation becomes the key problem in technology that restriction chip integration further improves.Show according to relevant investigation, 1 DEG C of the every increase on the basis of 70～80 DEG C of the operating temperature of electronic devices and components, its reliability will decline 5%, has more than 2/3rds chip all because high temperature lost efficacy.So high heat flow density, cannot meet by traditional fan cooling, and by increasing rotating speed and the blade diameter of fan, effect is not clearly, and the counter productive of bringing is as noise, oversize fairly obvious.Water-cooling effect is better, but needs external force to drive, and increases energy consumption, and reliability is also difficult to ensure simultaneously, once because water leaks, the phenomenon that will be short-circuited, causes immeasurable consequence.In recent years, hot pipe technique constantly applies to chip cooling, has obtained very large effect.But heat pipe heat radiation also has its limit, as steam and liquid flow in same pipeline, can produce working medium entrainment limit.And for example, not aspect is installed, if by heat pipe bending, radiating effect can reduce greatly.Therefore seek a kind of new chip cooling mode imperative.
Capillary pump ring, as a kind of new radiating mode, has many advantages, and as system adopts phase-change heat transfer, working medium absorbs the latent heat of vaporization in the time of evaporation, and heat dissipation capacity is large.Evaporimeter is separated with condenser, steam and liquid are flowed respectively in different pipelines, do not interfere with each other, therefore avoided the entrainment limit of heat pipe, its radiating effect can be than high 1～2 order of magnitude of heat pipe.In addition, evaporimeter is connected with PU pipe with condenser, and both positions and length can change flexibly, therefore bring great convenience to installation, can also realize remote heat radiation, and this is that heat pipe cannot be to realize.The driving force of whole capillary pump ring is provided by phase variable force and capillary force, does not need additionaling power, and therefore noise is low, energy-conservation, and reliability is high.
Although capillary pump ring has many advantages, also exist in addition some technological difficulties also not break through, such as liquid-sucking core, require porosity as far as possible little on the one hand, so that enough capillary force drive system work to be provided; Require again on the one hand in addition porosity as far as possible large, to reduce the flow resistance of working medium, the two is contradiction, is difficult to make both reach optimum state.In addition, capillary pump ring is easily to produce temperature and pressure oscillation in startup and the work of low heat flow density situation, and excessive fluctuation can make capillary pump ring be difficult to start, and even starts unsuccessfully.
2006.07.12 the Chinese invention patent description that the disclosed patent No. is CN200510101322.6 discloses a kind of capillary pump cooler with micro-groove wing structure and manufacture method thereof, this device comprises evaporimeter, condenser, steam union and liquid union, evaporimeter is connected with liquid union by steam union with condenser, form a system that liquid working substance circulates therein, in evaporimeter and condenser, be provided with the boiling enhanced plate of micro-groove wing with micro-groove wing structure by polylith alternate intercommunicating two sides.This device improves the cooling effectiveness of capillary pump by micro-groove wing structure, but fail to solve capillary pump cool cycles system, liquid-sucking core capillary porosity is had to the different problems that require.
Utility model content
Of the present utility modelly provide a kind of miniature capillary pump ring with gradient pore structured capillary wick, to solve the above-mentioned problems in the prior art.
The technical scheme that the utility model provides is as follows:
A kind of miniature capillary pump ring with gradient pore structured capillary wick, comprise evaporimeter 11, condenser 21, steam union 31 and liquid union 41, described evaporimeter 11 is divided into vaporization chamber 110 and compensating liquid chamber 120 by evaporimeter liquid-sucking core 100, described vaporization chamber 110 comprises steam conduit 111, evaporimeter base plate 112 and vaporium 113, described vaporium 113 is positioned at one end of described steam conduit 111, described steam conduit 111 is one with evaporimeter base plate 112, described steam conduit 111 is a series of rectangle deep trench that are cut into by warp, the top of described steam conduit 111 has micro-tooth 114, described evaporimeter liquid-sucking core 100 has gradient pore structured, described gradient pore structured little in the porosity near described steam conduit 111 1 sides, large near the porosity of described compensating liquid chamber 120 1 sides, described compensating liquid chamber 120 has point liquid bath 121 fitting tightly with described evaporimeter liquid-sucking core 100, the housing 115 of described evaporimeter 11 is provided with steam leadout hole 116 and working medium return port 122, and described steam leadout hole 116 is positioned at the side of described housing 115, is connected with described vaporium 113, and described working medium return port 122 is positioned at the top of described housing 115, described condenser 21 is divided into upper and lower two parts: upper part is made up of condenser upper cover 211, strengthening condensation structure 212, radiating fin 213, steam inlet 214 and working medium perfusing hole 215, bottom is made up of condenser liquid-sucking core 221, radiating fin 213, condenser lower cover 223 and sender property outlet 222, described evaporimeter 11 and described condenser 21 form a closed-loop path by described steam union 31 and described liquid union 41.
Further, described point of liquid bath 121 is crisscross structure, and the area that described point of liquid bath 121 fits tightly with described evaporimeter liquid-sucking core 100 is identical with the cross-sectional area of described evaporimeter liquid-sucking core 100, and the degree of depth of described point of liquid bath 121 is 8mm, and width is 2mm.
Further, described evaporimeter base plate 112 is copper plate.
Further, the degree of depth of described steam conduit 111 is 8～10mm, and width is 1～2mm.
Further, described evaporimeter liquid-sucking core 100 is metallic fiber sintered felt or foam metal.
Further, the equivalent diameter of the metallic fiber in described metallic fiber sintered felt is 50～100 μ m, and length is 150～250mm.
Further, described evaporimeter liquid-sucking core 100 has two gradient porosities, and the first gradient porosity is 75%～85%, and being preferably 80%, the second gradient porosity is 85%～95%, is preferably 90%.
Further, described evaporimeter liquid-sucking core 100 has three gradient porosities, and the first gradient porosity is 65%～75%, and being preferably 70%, the second gradient porosity is 75%～85%, and being preferably 80%, the three gradient porosity is 85%～95%, is preferably 90%.
Further, described condenser liquid-sucking core 221 is single pore structure.
For being further realizes the purpose of this utility model, described evaporimeter liquid-sucking core 100 gross thickness are 6mm, long and wide 70mm and the 40mm of being respectively.In two gradient porosity structures, liquid-sucking core 1001 thickness with the first gradient porosity are 2mm, and liquid-sucking core 1002 thickness with the second gradient porosity are 4mm; In three gradient porosity structures, liquid-sucking core 1003 thickness with the first gradient porosity are 1mm, and liquid-sucking core 1004 thickness with the second gradient porosity are 2mm, and liquid-sucking core 1005 thickness with the 3rd gradient porosity are 3mm.Described condenser liquid-sucking core 221 adopts 90% single porosity, and its thickness is 4mm.
The technical program is compared with background technology, and its tool has the following advantages:
1, little, the compact conformation of the utility model volume, without machine power, can realize the transmission of large heat, is particularly suitable for the occasion at small size region high heat flux.
2, the utility model proposes the evaporimeter liquid-sucking core with gradient porosity, in improving capillary force, reduce the flow resistance of system, accelerated the back-flow velocity of liquid working substance, improved greatly the heat-transfer capability of system.
3, metallic fiber sintered felt is applied to condenser by the utility model, temperature or the pressure oscillation situation that can avoid system to occur under startup or low heat flow density operating mode.
4, new each part processing technology thereof of this practicality is simple, and total easy installation and removal, is easy to maintaining.
Brief description of the drawings
Fig. 1 the utlity model has the miniature capillary pump loops front view of gradient pore structured capillary wick
Fig. 2 the utility model evaporimeter cutaway view
Fig. 3 the utility model condenser cutaway view
The two gradient porosity cutaway views of Fig. 4 the utility model
Fig. 5 the utility model three gradient porosity cutaway views
Fig. 6 the utility model divides liquid bath top view
Detailed description of the invention
The utility model is described in further detail below by way of embodiments and drawings, but the utility model is not limited only to this embodiment.
As shown in Figure 1, Figure 2 and Figure 3, the circulation route of working medium when capillary pump ring is worked.Heat passes to vaporization chamber 110 from evaporimeter base plate 112, working medium absorbs heat in the 111 the inside boiling vaporizations of steam conduit, absorb the latent heat of vaporization, the steam generating is assembled at vaporium 113 along steam conduit 111, along with the continuous increase of quantity of steam, the pressure of vaporium 113 constantly rises, and in the time that pressure exceedes system gross pressure, steam enters condenser 21 from steam leadout hole 116 along steam union 31.Steam enters after condenser 21, and because condenser 21 temperature are low, steam liquefied is emitted the latent heat of vaporization, and the working medium after liquefaction is got back to the compensating liquid chamber 120 of evaporimeter 11 through liquid union 41 from sender property outlet 222.Under 121 effects of 120 points of compensating liquid chambers liquid bath, be distributed in the surface of evaporimeter liquid-sucking core 100 uniform liquid, evaporimeter liquid-sucking core 100 produces certain capillary force, and the liquid working substance of backflow is sucked back to vaporization chamber 110, completes a working cycles.
As shown in Fig. 2 and Fig. 1, evaporimeter 11 is divided into two chambers in left and right by evaporimeter liquid-sucking core 100.Right-hand member is vaporization chamber 110, vaporization chamber 110 comprises steam conduit 111, evaporimeter base plate 112 and vaporium 113, vaporium 113 is connected with steam leadout hole 116, is provided with micro-tooth 114 at the top of steam conduit 111, can ensure the pressure balance of each steam conduit 111.Micro-tooth 114 is pressed together with the bottom of evaporimeter liquid-sucking core 100.The working medium of carrying out flash-pot liquid-sucking core 100 is distributed on steam conduit 111, and heat passes to steam conduit 111 through evaporimeter base plate 112, by liquid working substance vaporization above, after working medium vaporization, after the absorption latent heat of vaporization, heat is taken away.The steam producing constantly gathers at vaporium 113, and in the time that pressure exceedes SR, steam flows out and passes through steam union 31 from steam leadout hole 116 and arrives condenser 21.Evaporimeter liquid-sucking core 100 left ends are compensating liquid chamber 120, pass through working medium return port 122 from the liquid working substance of condenser 21, then through a point liquid bath 121 for compensating liquid chamber 120, working medium are evenly distributed in to evaporimeter liquid-sucking core 100 surfaces.Working medium arrives vaporization chamber 110 under the capillary force effect of evaporimeter liquid-sucking core 100.Evaporimeter liquid-sucking core 100 is also closely linked with a point liquid bath 121.
As shown in Fig. 3 and Fig. 1, condenser 21 is divided into condenser upper cover 211, strengthening condensation structure 212, and radiating fin 213, steam inlet 214, condenser liquid-sucking core 221, condenser lower cover 223, sender property outlet 222, and working medium perfusing hole 215 forms.The steam that carrys out flash-pot 11 enters condenser 21 through steam union by steam inlet 214, and under the effect of strengthening condensation structure 212, steam-condensation is liquid, and the heat that liquefaction discharges is dispersed in air by the radiating fin 213 of condenser upper cover 211.Working medium after the liquefaction condenser liquid-sucking core 221 of flowing through, then flows back to evaporimeter 11 by sender property outlet 222 through liquid union 41.The perfusion of liquid working substance and vacuumizing by working medium perfusing hole 215 realizes.Condenser liquid-sucking core 221 can also prevent steam pressure fluctuation, avoids the temperature fluctuation of system.
Fig. 4 and Fig. 5 are evaporimeter liquid-sucking core 100 cutaway views.Fig. 4 is two gradient porosity liquid sucting core structure schematic diagrames, whole evaporimeter liquid-sucking core 100 thickness are 6mm, porosity is respectively 80%, 90%, 80% porosity liquid-sucking core 1001 thickness are 2mm, near vaporization chamber 110 1 sides, 90% porosity liquid-sucking core 1002 thickness are 4mm, near compensating liquid chamber 120 1 sides, small porosity liquid-sucking core mainly plays a part to provide capillary force like this, and the liquid-sucking core of macroporosity mainly plays a part passage.Fig. 5 is three gradient porosity liquid sucting core structure schematic diagrames, and whole evaporimeter liquid-sucking core 100 thickness are 6mm, and porosity is respectively 70%, 80% and 90%.70% porosity liquid-sucking core 1003 thickness are 1mm, and near vaporization chamber 110 1 sides, 80% porosity liquid-sucking core 1004 thickness are 2mm, and 90% porosity liquid-sucking core 1005 thickness are 3mm, near compensating liquid chamber 120 1 sides.
Fig. 6 is point liquid bath 121 top views.Dividing liquid bath 121 wide is 2mm, and dark 8mm has a liquid inlet 1211 in the middle of point liquid bath 121 1 side surfaces, so that backflow working medium enters in conduit.Together with point liquid bath 121 opposite sides surfaces fit tightly with evaporimeter liquid-sucking core 100, so that liquid working substance can reach evaporimeter liquid-sucking core 100 surfaces smoothly.
Above are only a specific embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection domain.
Claims (13)
1. there is the miniature capillary pump ring of gradient pore structured capillary wick, comprise evaporimeter, condenser, steam union and liquid union, it is characterized in that: described evaporimeter is divided into vaporization chamber and compensating liquid chamber by evaporimeter liquid-sucking core, described vaporization chamber comprises steam conduit, evaporimeter base plate and vaporium, described vaporium is positioned at one end of described steam conduit, described steam conduit and evaporimeter base plate are one, described steam conduit is a series of rectangle deep trench that are cut into by warp, and the top of described steam conduit has micro-tooth; Described evaporimeter liquid-sucking core has gradient pore structured, described gradient pore structured little in the porosity near described steam conduit one side, large near the porosity of described compensating liquid chamber one side; Described compensating liquid chamber has point liquid bath fitting tightly with described evaporimeter liquid-sucking core; The housing of described evaporimeter is provided with steam leadout hole and working medium return port, and described steam leadout hole is positioned at the side of described housing, is connected with described vaporium, and described working medium return port is positioned at the top of described housing; Described condenser is divided into upper and lower two parts: upper part is made up of condenser upper cover, strengthening condensation structure, radiating fin, steam inlet and working medium perfusing hole; Bottom is made up of condenser lower cover, condenser liquid-sucking core, radiating fin and sender property outlet; Described evaporimeter and described condenser form a closed-loop path by described steam union and described liquid union.
2. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, described point of liquid bath is crisscross structure.
3. according to the miniature capillary pump ring described in claim 1 or 2 with gradient pore structured capillary wick, it is characterized in that, the area that described point of liquid bath fits tightly with described evaporimeter liquid-sucking core is identical with the cross-sectional area of described evaporimeter liquid-sucking core.
4. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, described evaporimeter base plate is copper plate.
5. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, the degree of depth of described steam conduit is 8～10mm, and width is 1～2mm.
6. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, the degree of depth of described point of liquid bath is 8mm, and width is 2mm.
7. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, described evaporimeter liquid-sucking core is metallic fiber sintered felt or foam metal.
8. the miniature capillary pump ring according to claim 7 with gradient pore structured capillary wick, is characterized in that, the equivalent diameter of the metallic fiber in described metallic fiber sintered felt is 50～100 μ m, and length is 150～250mm.
9. the miniature capillary pump ring according to claim 1 with gradient pore structured capillary wick, is characterized in that, described evaporimeter liquid-sucking core has two gradient porosities, and the first gradient porosity is that the 75%～85%, second gradient porosity is 85%～95%.
10. the miniature capillary pump ring according to claim 9 with gradient pore structured capillary wick, is characterized in that, described evaporimeter liquid-sucking core has two gradient porosities, and the first gradient porosity is that 80%, the second gradient porosity is 90%.
11. have the miniature capillary pump ring of gradient pore structured capillary wick according to claim 1, it is characterized in that, described evaporimeter liquid-sucking core has three gradient porosities, the first gradient porosity is 65%～75%, the second gradient porosity is that the 75%～85%, three gradient porosity is 85%～95%.
12. according to the miniature capillary pump ring described in claim 11 with gradient pore structured capillary wick, it is characterized in that, described evaporimeter liquid-sucking core has three gradient porosities, and the first gradient porosity is 70%, the second gradient porosity is that 80%, the three gradient porosity is 90%.
13. have the miniature capillary pump ring of gradient pore structured capillary wick according to claim 1, it is characterized in that, described condenser liquid-sucking core is single pore structure.
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| CN104089509A (en) * | 2014-07-21 | 2014-10-08 | 厦门大学 | Capillary pumped loop |
| CN104215110A (en) * | 2014-09-03 | 2014-12-17 | 华北电力大学 | Dropwise condensation enhancement condensation pipe with gradient capillary wick |
| CN104457357A (en) * | 2014-11-28 | 2015-03-25 | 华南理工大学 | Device and method for automatically producing vapor chamber liquid absorbing cores |
| CN106288915A (en) * | 2015-05-18 | 2017-01-04 | 华北电力大学 | The multiple dimensioned condensing tube of liquid surface engagement is hated based on parent |
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| WO2017107191A1 (en) * | 2015-12-25 | 2017-06-29 | Kechuang Lin | Heat exchange material, apparatus and system |
| CN108125547A (en) * | 2016-12-01 | 2018-06-08 | 佛山市顺德区美的电热电器制造有限公司 | A kind of samming pot of the liquid-sucking core containing different pore size |
| CN108917443A (en) * | 2018-09-05 | 2018-11-30 | 中国电子科技集团公司信息科学研究院 | A kind of flat-plate minitype loop circuit heat pipe of stacked in layers structure |
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| CN104089509A (en) * | 2014-07-21 | 2014-10-08 | 厦门大学 | Capillary pumped loop |
| CN104215110A (en) * | 2014-09-03 | 2014-12-17 | 华北电力大学 | Dropwise condensation enhancement condensation pipe with gradient capillary wick |
| 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 |
| CN104457357A (en) * | 2014-11-28 | 2015-03-25 | 华南理工大学 | Device and method for automatically producing vapor chamber liquid absorbing cores |
| CN104457357B (en) * | 2014-11-28 | 2016-10-05 | 华南理工大学 | A kind of soaking plate wick automatic production device and method |
| CN106288915A (en) * | 2015-05-18 | 2017-01-04 | 华北电力大学 | The multiple dimensioned condensing tube of liquid surface engagement is hated based on parent |
| CN106838843A (en) * | 2015-12-03 | 2017-06-13 | 广东茵坦斯能源科技有限公司 | A kind of high-powered LED lamp cooling system |
| WO2017107191A1 (en) * | 2015-12-25 | 2017-06-29 | Kechuang Lin | Heat exchange material, apparatus and system |
| CN108125547A (en) * | 2016-12-01 | 2018-06-08 | 佛山市顺德区美的电热电器制造有限公司 | A kind of samming pot of the liquid-sucking core containing different pore size |
| CN108125547B (en) * | 2016-12-01 | 2023-09-22 | 佛山市顺德区美的电热电器制造有限公司 | Samming pot containing liquid absorbing cores with different apertures |
| CN111527367A (en) * | 2017-12-28 | 2020-08-11 | 古河电气工业株式会社 | Heat pipe |
| CN111527367B (en) * | 2017-12-28 | 2021-11-05 | 古河电气工业株式会社 | Heat pipe |
| CN108917443A (en) * | 2018-09-05 | 2018-11-30 | 中国电子科技集团公司信息科学研究院 | A kind of flat-plate minitype loop circuit heat pipe of stacked in layers structure |
| CN110530185A (en) * | 2019-08-20 | 2019-12-03 | 西安交通大学 | A kind of micro-structure liquid self-propelled plates formula loop circuit heat pipe with branch |
| CN110411258A (en) * | 2019-08-27 | 2019-11-05 | 广东工业大学 | A kind of radiator of gravity loop heat pipe for CPU heat dissipation |
| CN113977025A (en) * | 2020-12-04 | 2022-01-28 | 中国电器科学研究院股份有限公司 | Method for preparing large-gap soldered joint |
| CN112815752A (en) * | 2020-12-31 | 2021-05-18 | 北京航空航天大学 | Thermal control system of two-phase fluid heat exchange loop of spacecraft |
| CN114053740A (en) * | 2021-12-06 | 2022-02-18 | 北京微焓科技有限公司 | Self-regulating evaporator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20190121 |