CN104089509A - Capillary pumped loop - Google Patents
Capillary pumped loop Download PDFInfo
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- CN104089509A CN104089509A CN201410347252.1A CN201410347252A CN104089509A CN 104089509 A CN104089509 A CN 104089509A CN 201410347252 A CN201410347252 A CN 201410347252A CN 104089509 A CN104089509 A CN 104089509A
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- liquid
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- sucking core
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Abstract
The invention discloses a capillary pumped loop which comprises an evaporator, a condenser, a steam connecting pipe and a liquid connecting pipe. An air out let of the evaporator is communicated with an air inlet of the condenser through the steam connecting pipe, a liquid outlet of the condenser is communicated with a liquid inlet of the evaporator through the liquid connecting pipe, the evaporator comprises a shell, a first liquid absorption core and a second liquid absorption core are stacked in the shell from top to bottom, the upper surface of the first liquid absorption core and the inner top surface of the shell form a liquid compensation chamber, the liquid compensation chamber is communicated with a liquid inlet, the bottom of the second liquid absorption core is attached to the bottom wall of the shell and provided with staggered steam grooves, the steam grooves are communicated with an air outlet, and the porosity of the first liquid absorption core and the porosity of the second liquid absorption core are increased from top to bottom gradually. According to the capillary pumped loop, it is guaranteed that enough liquid working media for wetting are available in an evaporating area, a dry burning phenomenon can be avoided under high power conditions, generated steam can escape in time, and flow resistance of a system is reduced.
Description
Technical field
The present invention is specifically related to a kind of capillary pump ring.
Background technology
Along with the develop rapidly of electronic chip, chip volume is more and more less, and integrated level is increasing.According to relevant investigation, more than chip heating power has developed into present 200W by 100W several years ago, the heat flow density of chip has reached 10
5-10
6w/m
2, and have the trend of continuous rising.High heat flow density certainly will cause temperature sharply to rise, 1 ℃ of the every increase on the basis of 70~80 ℃ of the operating temperature of electronic devices and components, its reliability will decline 5%, surpasses 100 ℃ and can burn electronic chip, has more than 2/3rds chip all because high temperature lost efficacy.Therefore, the heat radiation of electronic chip becomes the focus of paying close attention in industry.
The major way of current chip heat radiation has wind-cooling heat dissipating, water-cooling, thermoelectric cooling and heat pipe heat radiation etc.Wind-cooling heat dissipating is because equipment is simple, and reliability is high, be widely applied, but because the thermal capacity of air is limited, the wind-cooling heat dissipating limit is 130W, cannot meet the heat radiation requirement of current electronic chip.Water-cooling ability is strong, can meet most of chip cooling, but water-cooling radiating structure is complicated, needs the driving of external pump, easily reveals simultaneously, and poor reliability, is not therefore promoted preferably.Thermoelectric cooling needs large-scale equipment, carries inconvenience, is not easy to the heat radiation of microminiature electronic chip.Heat pipe adopts phase-change heat transfer mechanism, and heat dissipation capacity is large, has good isothermal, simple in structure, and good reliability is without extra power input, comparatively general in equipment application such as notebook computers.But heat pipe is rigid straight pipe, makes troubles to installation, if heat pipe is crooked, its heat-transfer capability is had a greatly reduced quality; Steam and liquid flow in same pipe, and due to entrainment limit, its heat-sinking capability is also restricted.
Capillary pump ring (capillary pumped loop is called for short CPL) comprises evaporimeter and condenser, adopts flexible PU pipe that both are coupled together.CPL equally adopts phase-change heat transfer with conventional heat pipe, and liquid working substance absorbs the latent heat of vaporization at evaporimeter, at condenser, emits heat, and heat dispersion is large; Evaporimeter and condenser separately, can be arranged arbitrarily position between the two, easy for installation, and have certain antigravity ability; Steam and liquid flow in different pipelines, without entrainment limit; System produces capillary suction force by liquid-sucking core and drives, without additionaling power; Liquid-sucking core is only present in evaporimeter, and system flow resistance is little, so the heat dispersion of CPL often exceeds 2 more than the order of magnitude than conventional heat pipe.CPL generally adopts the good metal of thermal conductivity factor as liquid-sucking core material at present, and heat major part passes to evaporation region, and some is leaked to compensating liquid chamber through liquid-sucking core.This part heat makes in compensating liquid chamber, to produce bubble, hinders liquid and reaches evaporation region, light reduce the heat dispersion of CPL, and heavy system cannot be moved.In addition,, in order to obtain larger capillary suction force, need to reduce the porosity of liquid-sucking core, but the method can increase the flow resistance of liquid working substance.In order further to improve the heat dispersion of CPL, must reduce heat leak to compensating liquid chamber, also need to when improving capillary suction force, reduce the flow resistance of system.The liquid-sucking core of current most of CPL adopts single porosity, is difficult to reach this requirement.
Summary of the invention
The object of the invention is to overcome prior art defect, a kind of capillary pump ring is provided.
Concrete technical scheme of the present invention is as follows:
A kind of capillary pump ring, comprise evaporimeter, condenser, steam union and liquid union, evaporimeter comprises an inlet and a gas outlet, condenser comprises an air inlet and a liquid outlet, the gas outlet of evaporimeter is connected with the air inlet of condenser by steam union, the liquid outlet of condenser is connected with the inlet of evaporimeter by liquid union
Described evaporimeter comprises a housing, in this housing, fill an imbibition core body, and the upper surface of this imbibition core body and the inner top surface of housing form a compensating liquid chamber, compensating liquid chamber is communicated with described inlet, the bottom of this imbibition core body and the diapire of housing are fitted and are provided with longitudinal steam groove, this steam groove is communicated with described gas outlet, and the porosity of this imbibition core body increases from top to bottom gradually, from 50%, is increased to gradually 90%.
In a preferred embodiment of the invention, described imbibition core body comprises the first liquid-sucking core and one second liquid-sucking core that stacks from top to bottom filling, and the upper surface of the first liquid-sucking core and the inner top surface of housing form a compensating liquid chamber, compensating liquid chamber is communicated with described inlet, the bottom of the second liquid-sucking core and the diapire of housing are fitted and are provided with longitudinal steam groove, this steam groove is communicated with described gas outlet, wherein the porosity of the first liquid-sucking core and the second liquid-sucking core all increases from top to bottom gradually, from 50%, is increased to gradually 90%.
Further preferred, the steel ball by some diameter 1~2mm between described the first liquid-sucking core and the second liquid-sucking core separates.
Further preferred, between described the first liquid-sucking core and compensating liquid chamber, by a thermal insulation layer, separate, this thermal insulation layer is provided with some through holes.
Further preferred, the thermal conductivity factor of the material of described the first liquid-sucking core is less than the thermal conductivity factor of the material of the second liquid-sucking core.
In a preferred embodiment of the invention, the inner top surface of described compensating liquid chamber is provided with some interlaced grooves, and its width is 2mm, and the degree of depth is 4mm.
In a preferred embodiment of the invention, described condenser comprises the condensation cavity of a connection air inlet and liquid outlet and the radiating fin of lower surface provided thereon, in this condensation cavity, be provided with the projection that some height are 10mm, the cross section of this projection is the rhombus of length of side 3mm or square, and its arrangement mode in condensation cavity is in-line arrangement or insert row.Further preferred, described condenser also comprises the valve of the described condensation cavity of a connection.
In a preferred embodiment of the invention, the air inlet of the diameter of described steam union from the gas outlet of evaporimeter to condenser becomes greatly gradually, and its minimum diameter is greater than the diameter of liquid union.
In a preferred embodiment of the invention, the material of described steam union and liquid union is PU.
In a preferred embodiment of the invention, this capillary pump ring adopts nanometer elargol to seal.
The invention has the beneficial effects as follows:
1, the bottom of imbibition core body of capillary pump ring of the present invention and the diapire of housing are fitted and are provided with longitudinal steam groove, this steam groove itself is evaporating area and is communicated with described gas outlet, liquid working substance can directly be contacted with shell bottom wall, obviously shorten start-up time, improve radiating effect;
2, the imbibition core body of capillary pump ring of the present invention adopts non-homogeneous porosity structure, increase gradually from top to bottom, from 50%, be increased to gradually 90%, from evaporating area, one side reduces gradually to the porosity of compensating liquid chamber one side, on the one hand, little porosity can provide large capillary force, guarantee that evaporating area can have enough liquid working substances wetting, on the other hand, large porosity can be stored a large amount of liquid, avoid occurring dry combustion method phenomenon also contributing to the steam producing to overflow in time under high-power operating mode, reduce system flow resistance;
3, the first liquid-sucking core of capillary pump ring of the present invention and the second liquid-sucking core stack up and down, the thermal conductivity factor of the material of the first liquid-sucking core is less than the thermal conductivity factor of the material of the second liquid-sucking core, in evaporating area, adopt the high material of thermal conductivity factor, accelerate heat and pass to this district, enhanced water evaporation; In an other side, adopt the low material of thermal conductivity factor, avoid heat leak;
4, between the first liquid-sucking core of capillary pump ring of the present invention and the second liquid-sucking core, by some steel balls, separate, can reduce two parts liquid-sucking core contact, reduce heat transmission, can effectively reduce and expel the heat-evil;
5, between the first liquid-sucking core of capillary pump ring of the present invention and compensating liquid chamber, by a thermal insulation layer, separate, this thermal insulation layer is provided with some through holes, both can stop heat from evaporating area, to be leaked to compensating liquid chamber, also can guarantee passing through smoothly of liquid simultaneously;
6, the condenser of capillary pump ring of the present invention comprises the condensation cavity of a connection air inlet and liquid outlet and the radiating fin of lower surface provided thereon, in this condensation cavity, be provided with the projection that some height are 10mm, the cross section of this projection is the rhombus of length of side 3mm or square, and its arrangement mode in condensation cavity is in-line arrangement or insert row, disturbance, the expansion area of dissipation that can increase steam, condensation effect significantly improves;
7, the steam union of capillary pump ring of the present invention and the material of liquid union are PU, and the air inlet of the diameter of steam union from the gas outlet of evaporimeter to condenser becomes large gradually, its minimum diameter is greater than the diameter of liquid union, according to continuity equation and Bernoulli equation, in the situation that elevating head is certain, enlarged tube sectional area, can reduce kinetic head, and then increase pressure head, be convenient to the abundant condensation of working medium;
9, capillary pump ring of the present invention adopts nanometer elargol to seal, and effectively guarantees air-tightness and the vacuum of system, improves the whole heat transfer property of capillary pump ring.
Accompanying drawing explanation
Fig. 1 is the perspective view of capillary pump ring of the present invention;
Fig. 2 is that Fig. 1 is along the cutaway view of A-A;
Fig. 3 is the structural representation of end face of compensating liquid chamber of the evaporimeter of capillary pump ring of the present invention;
Fig. 4 is one of the internal structure cutaway view of the evaporimeter of capillary pump ring of the present invention;
Fig. 5 be capillary pump ring of the present invention evaporimeter internal structure cutaway view two;
Fig. 6 is the perspective view of the projection in the condenser of capillary pump ring of the present invention.
The specific embodiment
By the specific embodiment, by reference to the accompanying drawings technical scheme of the present invention is further detailed and is described below.
As depicted in figs. 1 and 2, a kind of capillary pump ring, comprise evaporimeter 1, condenser 2, steam union 3 and liquid union 4, evaporimeter 1 comprises an inlet 11 and a gas outlet 12, the material of above-mentioned evaporimeter 1 is preferably red copper, the material of above-mentioned condenser 2 is preferably aluminium alloy, condenser 2 comprises an air inlet 21 and a liquid outlet 22, the gas outlet 12 of evaporimeter 1 is connected with the air inlet 21 of condenser 2 by steam union, the liquid outlet 22 of condenser 2 is connected with the inlet 11 of evaporimeter 1 by liquid union 4, in addition, three-way pipe 5 is equipped with respectively at two ends in steam union 3 and liquid union 4, be convenient to install the actual temperature of thermocouple measurement working medium, this capillary pump ring adopts nanometer elargol to seal, air-tightness and the vacuum of effective assurance system, improve the whole heat transfer property of capillary pump ring.
As shown in Figure 4 and Figure 5, described evaporimeter 1 comprises a housing 13, (this first liquid-sucking core 14 and the second liquid-sucking core 15 can be integrated in this housing 13, to stack from top to bottom filling one first liquid-sucking core 14 and one second liquid-sucking core 15, be an imbibition core body), the upper surface of the first liquid-sucking core 14 is communicated with the compensating liquid chamber 16 of described inlet 11 with the inner top surface formation one of housing 13, as shown in Figure 3, the inner top surface of this compensating liquid chamber 16 is provided with some interlaced grooves 161, its width is 2mm, and the degree of depth is 4mm; The diapire of the bottom of the second liquid-sucking core 15 and housing 13 is fitted and is provided with longitudinal steam groove 151, this steam groove 151 is evaporating area and is communicated with described gas outlet 12, liquid working substance can directly be contacted with housing 13 diapires, obviously shorten start-up time, improve radiating effect;
The porosity of the first liquid-sucking core 14 and the second liquid-sucking core 15 all increases from top to bottom gradually, from 50%, be increased to gradually 90%, if the imbibition core body of integral structure, its porosity is increased to 90% gradually from 50% from top to bottom, on the one hand, little porosity can provide large capillary force, guarantee that evaporating area can have enough liquid working substances wetting, on the other hand, large porosity can be stored a large amount of liquid, avoid occurring dry combustion method phenomenon also contributing to the steam producing to overflow in time under high-power operating mode, reduce system flow resistance; The material of above-mentioned two liquid-sucking cores can be the metallic fiber sintered plate of mold pressing Low Temperature Solid-Phase sintering technology, also can be foam metal or other porous metal structures, preferred material is a kind of or mixing in copper, stainless steel or nickel, and the thermal conductivity factor of the material of the first liquid-sucking core 14 is less than the thermal conductivity factor of the material of the second liquid-sucking core 15, further preferred, the upper surface of the imbibition core body of the upper surface of the first liquid-sucking core 14 or integral structure can apply the coating (coating can adopt silicate composite material or water-proof acrylic acid paint etc.) that one deck reduces thermal conductivity factor; Can be as shown in Figure 4 between this first liquid-sucking core 14 and the second liquid-sucking core 15, steel ball 17 by some diameter 1~2mm separates, reduce two parts liquid-sucking core contact, reduce heat transmission, can effectively reduce and expel the heat-evil, or as shown in Figure 5, by a thermal insulation layer 18, separate, this thermal insulation layer 18 is provided with some through holes, both can stop heat from evaporating area, to be leaked to compensating liquid chamber 16, also can guarantee passing through smoothly of liquid, in the present embodiment, this thermal insulation layer 18 is plank simultaneously.
Described condenser 2 comprises the condensation cavity 23 of a connection air inlet 21 and liquid outlet 22 and the radiating fin 24 of lower surface provided thereon, as shown in Figure 6, in this condensation cavity 23, being provided with some height is the projection 231 of 10mm, the cross section of this projection 231 is the rhombus of length of side 3mm or square, and its arrangement mode in condensation cavity 23 is in-line arrangement or insert row, disturbance, the expansion area of dissipation that can increase steam, condensation effect significantly improves.Further preferred, described condenser 2 also comprises the valve 25 of the described condensation cavity 23 of a connection, to facilitate, fills working medium and vacuumizes.
The material of described steam union 3 and liquid union 4 is PU, and the air inlet 21 of the diameter of steam union 3 from the gas outlet 12 of evaporimeter 1 to condenser 2 becomes large gradually, its minimum diameter is greater than the diameter of liquid union 4, according to continuity equation and Bernoulli equation, in the situation that elevating head is certain, enlarged tube sectional area, can reduce kinetic head, and then increase pressure head, be convenient to the abundant condensation of working medium.
Above-mentioned capillary pump ring is when work, first the diapire of the housing 13 of evaporimeter 1 absorbs the heat of chip, be delivered to the steam groove 151 (being evaporating area) of the second liquid-sucking core 15, by the capillary suction force effect of the first liquid-sucking core 14 and the second liquid-sucking core 15, liquid working substance is drawn onto to steam groove 151 from compensating liquid chamber 16, and absorbing latent heat vaporization at this, the steam of generation is derived evaporimeter 1 by the steam groove 151 of the second liquid-sucking core 15, through steam union 13, arrives condenser 2; Steam liquefies and emits latent heat under the effect of condenser 2, and the radiating fin 24 by condenser 2 is dispersed in air and goes; Working medium after liquefaction is got back to compensating liquid chamber 16 along liquid union 4, completes a circulation.
The above, be only preferred embodiment of the present invention, therefore can not limit according to this scope of the invention process, the equivalence done according to the scope of the claims of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.
Claims (10)
1. a capillary pump ring, comprise evaporimeter, condenser, steam union and liquid union, evaporimeter comprises an inlet and a gas outlet, condenser comprises an air inlet and a liquid outlet, the gas outlet of evaporimeter is connected with the air inlet of condenser by steam union, the liquid outlet of condenser is connected with the inlet of evaporimeter by liquid union, it is characterized in that:
Described evaporimeter comprises a housing, in this housing, fill an imbibition core body, and the upper surface of this imbibition core body and the inner top surface of housing form a compensating liquid chamber, compensating liquid chamber is communicated with described inlet, the bottom of this imbibition core body and the diapire of housing are fitted and are provided with longitudinal steam groove, this steam groove is communicated with described gas outlet, and the porosity of this imbibition core body increases from top to bottom gradually, from 50%, is increased to gradually 90%.
2. a kind of capillary pump ring as claimed in claim 1, it is characterized in that: described imbibition core body comprises the first liquid-sucking core and one second liquid-sucking core that stacks from top to bottom filling, and the upper surface of the first liquid-sucking core and the inner top surface of housing form a compensating liquid chamber, compensating liquid chamber is communicated with described inlet, the bottom of the second liquid-sucking core and the diapire of housing are fitted and are provided with longitudinal steam groove, this steam groove is communicated with described gas outlet, wherein the porosity of the first liquid-sucking core and the second liquid-sucking core all increases from top to bottom gradually, from 50%, is increased to gradually 90%.
3. a kind of capillary pump ring as claimed in claim 2, is characterized in that: the steel ball by some diameter 1~2mm between described the first liquid-sucking core and the second liquid-sucking core separates.
4. a kind of capillary pump ring as claimed in claim 2, is characterized in that: between described the first liquid-sucking core and compensating liquid chamber, by a thermal insulation layer, separate, this thermal insulation layer is provided with some through holes.
5. a kind of capillary pump ring as claimed in claim 2, is characterized in that: the thermal conductivity factor of the material of described the first liquid-sucking core is less than the thermal conductivity factor of the material of the second liquid-sucking core.
6. a kind of capillary pump ring as claimed in claim 1 or 2, is characterized in that: the inner top surface of described compensating liquid chamber is provided with some interlaced grooves, and its width is 2mm, and the degree of depth is 4mm.
7. a kind of capillary pump ring as claimed in claim 1 or 2, it is characterized in that: described condenser comprises the condensation cavity of a connection air inlet and liquid outlet and the radiating fin of lower surface provided thereon, in this condensation cavity, be provided with the projection that some height are 10mm, the cross section of this projection is the rhombus of length of side 3mm or square, and its arrangement mode in condensation cavity is in-line arrangement or insert row.
8. a kind of capillary pump ring as claimed in claim 1, is characterized in that: the air inlet of the diameter of described steam union from the gas outlet of evaporimeter to condenser becomes greatly gradually, and its minimum diameter is greater than the diameter of liquid union.
9. a kind of capillary pump ring as claimed in claim 1, is characterized in that: the material of described steam union and liquid union is PU.
10. a kind of capillary pump ring as claimed in claim 1, is characterized in that: this capillary pump ring adopts nanometer elargol to seal.
Priority Applications (1)
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CN201410347252.1A CN104089509A (en) | 2014-07-21 | 2014-07-21 | Capillary pumped loop |
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CN201410347252.1A CN104089509A (en) | 2014-07-21 | 2014-07-21 | Capillary pumped loop |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104949557A (en) * | 2015-06-12 | 2015-09-30 | 厦门大学 | Anti-gravity capillary pumped loop |
CN105246302A (en) * | 2015-11-04 | 2016-01-13 | 天津商业大学 | Heat pipe radiator |
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 |
CN107024126A (en) * | 2017-04-27 | 2017-08-08 | 厦门大学 | A kind of variable volume condenser for hair cell regeneration |
CN107407531A (en) * | 2015-03-26 | 2017-11-28 | 株式会社村田制作所 | Piece type heat pipe |
CN109210640A (en) * | 2018-09-11 | 2019-01-15 | 珠海格力电器股份有限公司 | A kind of radiator and the air conditioner using the radiator |
CN111442670A (en) * | 2019-01-16 | 2020-07-24 | 多美达(深圳)电器有限公司 | Evaporation box for heat pipe radiator |
CN114096794A (en) * | 2019-08-09 | 2022-02-25 | 矢崎能源***公司 | Structure and method for manufacturing structure |
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CN115493436A (en) * | 2022-09-15 | 2022-12-20 | 维沃移动通信有限公司 | Evaporator, heat dissipation device and electronic equipment |
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Cited By (17)
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CN107407531A (en) * | 2015-03-26 | 2017-11-28 | 株式会社村田制作所 | Piece type heat pipe |
US10544994B2 (en) | 2015-03-26 | 2020-01-28 | Murata Manufacturing Co., Ltd. | Sheet-shaped heat pipe |
CN104949557B (en) * | 2015-06-12 | 2016-09-07 | 厦门大学 | Antigravity hair cell regeneration |
CN104949557A (en) * | 2015-06-12 | 2015-09-30 | 厦门大学 | Anti-gravity capillary pumped loop |
CN105246302A (en) * | 2015-11-04 | 2016-01-13 | 天津商业大学 | Heat pipe radiator |
CN105246302B (en) * | 2015-11-04 | 2017-06-30 | 天津商业大学 | A kind of heat-pipe radiating apparatus |
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 |
CN107024126A (en) * | 2017-04-27 | 2017-08-08 | 厦门大学 | A kind of variable volume condenser for hair cell regeneration |
CN107024126B (en) * | 2017-04-27 | 2018-12-28 | 厦门大学 | A kind of variable volume condenser for hair cell regeneration |
CN109210640A (en) * | 2018-09-11 | 2019-01-15 | 珠海格力电器股份有限公司 | A kind of radiator and the air conditioner using the radiator |
CN111442670A (en) * | 2019-01-16 | 2020-07-24 | 多美达(深圳)电器有限公司 | Evaporation box for heat pipe radiator |
CN114096794A (en) * | 2019-08-09 | 2022-02-25 | 矢崎能源***公司 | Structure and method for manufacturing structure |
CN114791237A (en) * | 2021-01-26 | 2022-07-26 | 山东大学 | Loop heat pipe |
CN114791237B (en) * | 2021-01-26 | 2024-05-17 | 山东大学 | Loop heat pipe |
CN115493436A (en) * | 2022-09-15 | 2022-12-20 | 维沃移动通信有限公司 | Evaporator, heat dissipation device and electronic equipment |
WO2024055907A1 (en) * | 2022-09-15 | 2024-03-21 | 维沃移动通信有限公司 | Evaporator, heat dissipation apparatus and electronic device |
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