CN101672592B - Miniaturized loop heat pipe - Google Patents
Miniaturized loop heat pipe Download PDFInfo
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- CN101672592B CN101672592B CN 200910197303 CN200910197303A CN101672592B CN 101672592 B CN101672592 B CN 101672592B CN 200910197303 CN200910197303 CN 200910197303 CN 200910197303 A CN200910197303 A CN 200910197303A CN 101672592 B CN101672592 B CN 101672592B
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- condenser
- heat pipe
- liquid
- loop heat
- evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a miniaturized loop heat pipe which comprises an evaporator, a liquid pool and a condenser, wherein the liquid pool and the condenser are connected with the evaporator into an integral, and the evaporator, the liquid pool and the condenser are connected together through a fine thin wall pipe made of stainless steel to form a loop. When the miniaturized loop heat pipe is applied to the environment lower than 200K, an air reservoir which is connected to a steam pipeline is used for reducing the storage pressure of the miniaturized loop heat pipe in the normal temperature environment. The invention is mainly characterized in that a liquid absorbing core in the evaporator is redesigned; a metal mesh is used as a secondary liquid absorbing core; and a circumferential thread channel is carved on the surface of the main liquid absorbing core to enable the liquid to be distributed uniformly, and an axial rectangular channel is carved to be used as a flow passage of steam. A new condenser is designed, and thread fins, rectangular fins or saw teeth are additionally arranged on the flow passage of working substances to be used as a condensation strengthening measure, thereby improving the condensation efficiency and reducing the size and the weight of the condenser.
Description
Technical field
The present invention relates to heat transfer technology, specifically refer to a kind of miniaturized loop heat pipe, it is applied in the thermal control and Cryogenic Optical System of small-sized spacecraft.
Background technology
Miniaturized loop heat pipe is one of important trend of loop circuit heat pipe future development.In space industry, the efficient heat transmission part of miniaturization such as the miniaturized loop heat pipe that are applied to micro-satellite are one of key technologies in the micro-satellite development.In Cryogenic Optical System, in order to improve the integrated level of Cryogenic Optical System, reduce the weight of whole system in addition, the miniaturization low-temperature loop heat pipe that is applied to the coupling of refrigeration machine and detector also is one of key technology.
The main difficult technical of restriction miniaturized loop heat pipe designs miniaturization condenser efficiently exactly.The tradition loop circuit heat pipe condenser is to be welded direct on copper plate or the corrosion resistant plate bending to snakelike copper tube or stainless steel tube.Because be subjected to the influence of copper tube or stainless steel tube bending radius, the size of this condenser is big, Heavy Weight.And because the stainless steel tube and the copper tube that use all are light pipes, thus gaseous working medium when in condenser, catching a cold condensation efficiency not high, need to add and strengthen the measure of condensing.
The another one technical barrier of restriction miniaturized loop heat pipe is exactly small-sized evaporimeter.The main at present external diameter that uses surpasses the above evaporimeter of 20mm.Though this evaporimeter makes loop circuit heat pipe have very big heat-transfer capability, this heat-transfer capability has surpassed the demand of conducting heat in small-sized spacecraft or the Cryogenic Optical System.If use the evaporimeter that is no more than 15mm instead, not only can satisfy this demand, can also reduce the weight of loop circuit heat pipe.
Summary of the invention
The purpose of this invention is to provide a kind of miniaturized loop heat pipe, in the design of loop circuit heat pipe condenser, provide a kind of new mentality of designing, added and strengthened the measure of condensing, reduced the weight and the size of condenser.Also use external diameter to be lower than the evaporation pan of 15mm in addition, satisfied under the prerequisite of heat-transfer capability, reduced the weight of loop circuit heat pipe, solved the miniaturization issues of loop circuit heat pipe.
The technology bill that the present invention adopts is as follows:
This miniaturized loop heat pipe comprises evaporimeter 1, liquid pool 2, condenser 4, uses liquid line 3, gas line 5 that above-mentioned three unit Series to together, are formed loop; Wherein evaporimeter 1 connects together with liquid pool 2, and main imbibition core 1-3 and time imbibition core 1-4 are contained in evaporimeter inside; When this small loop heat pipe is extended to when using in the low temperature environment, add air reservoir 6.
This miniaturized loop heat pipe is characterised in that:
Condenser 4 directly punches on a metal, forms crooked working medium flow channel 4-2, adds screw thread fin, rectangle fin or sawtooth 4-1 as the reinforcement measure of condensing in the hole.
When this miniaturized loop heat pipe is used for the following warm area of 200K, adds air reservoir 6, and be connected on the gas line 5.
When low temperature used, evaporimeter 1, condenser 4 used the big metal materials of thermal conductivity factor such as red coppers, aluminium, aluminium alloy on normal temperature use or ground, and liquid pool 2, liquid line 3, gas line 5 use stainless steel materials; When using in the low temperature environment of space, evaporimeter 1, liquid pool 2, condenser 4, liquid line 3, gas line 5 use metal material of the same race or thermal coefficient of expansion to change little metal, and surface gold-plating or covering multilayer.
Used evaporation pan, its external diameter is no more than 15mm, the inner porous metals agglomerated material that uses is as main imbibition core 1-3, use woven wire as time imbibition core 1-4, wherein main imbibition core 1-3 surface carves circumferential screw thread conduit 1-3-1 makes liquid distribution even, carves the flow channel of axial rectangular duct 1-3-2 as steam.
Advantage of the present invention is as follows:
(1) in the design of condenser, added and strengthened the measure of condensing, made the condensation efficiency of the inner saturated gaseous working medium of condenser higher, reduced the length of pipeline and the volume of condenser.
(2) carve circumferential screw thread conduit at main imbibition wicking surface, make the temperature of evaporator surface even.Carve axial rectangular duct at main imbibition wicking surface, reduce the flowing pressure of steam.
(3) directly use silk screen as inferior imbibition core, abandoned the metal polyporous material of using always in the loop circuit heat pipe, can reduce cost.
When (4) in the low temperature environment of space, using, require the various parts of the low-temperature loop heat pipe of miniaturization to use same material, can avoid because the stress that the difference of thermal coefficient of expansion causes is concentrated.
Description of drawings
Fig. 1 uses the overall construction drawing of novel condenser and New Evaporator loop circuit heat pipe.
The profile that Fig. 2 evaporimeter is connected with liquid pool.
Fig. 3 condenser structure figure.
Fig. 4 master's liquid sucting core structure figure.
The specific embodiment
Now in conjunction with the accompanying drawings the present invention is elaborated.
Shown in Figure 1, miniaturized loop heat pipe of the present invention comprises evaporimeter 1, liquid pool 2, condenser 4, use liquid line 3, gas line 5, above-mentioned three unit Series are arrived together, form loop, wherein evaporimeter 1 connects together with liquid pool 2, and main imbibition core 1-3 and time imbibition core 1-4 are contained in evaporimeter inside.
When this miniaturized loop heat pipe when normal temperature is worked, directly toward liquid pool 2 towards fluid injection attitude working medium.Because the effect of main imbibition core 1-3 capillary force, main evaporator 1 inside is full of liquid.Because the effect of the circumferential screw thread conduit 1-3-1 of main imbibition core 1-3 outer surface, distribution of liquid can be very even.Heating fumigators 1 is strengthened the boiling measure because the inner surface of evaporator shell 1-2 exists, and the nucleus of boiling forms fast at evaporimeter inwall 1-2.Steam flows to condenser 4 along main imbibition core 1-3 outer surface axial slot 1-3-2 by gas line 5.Because the effect of condenser 4 internal fins has increased heat exchange area, attenuate thickness of liquid film, therefore strengthen working medium and condense.Liquid refrigerant is cold excessively in condenser 4, flows back to evaporimeter again by liquid line 5 again then.When the liquid refrigerant in the inflow evaporator 1 is excessive, can exist in the liquid pool.
When miniaturized loop heat pipe uses at low temperatures, air reservoir 6 is connected on the steam pipe line 5 of miniaturized loop heat pipe.Connect after the low-temperature receiver, because liquid refrigerant is at first in condenser 4 inner appearance.Arrange that near liquid line one side a maximum heating power is no more than the film-type heating plate of 5W at condenser 4.Heating liquid produces and drives, and makes it to flow to evaporimeter 4.When the temperature of evaporimeter 4 and sink temperature are more or less the same, close the driving heating plate, heating fumigators 4, the ensuing course of work is as described in the epimere.
Claims (2)
1. a miniaturized loop heat pipe comprises evaporimeter (1), liquid pool (2), condenser (4), liquid line (3), gas line (5), it is characterized in that:
The external diameter of described evaporimeter (1) is no more than 15mm, the inner porous metals agglomerated material that uses is as main imbibition core (1-3), use woven wire as time imbibition core (1-4), wherein main imbibition core (1-3) surface carves circumferential screw thread conduit (1-3-1) makes liquid distribution even, carves the flow channel of axial rectangular duct (1-3-2) as steam;
Described condenser (4) directly punches on a metal, forms crooked working medium flow channel (4-2), adds in the hole as reinforcement condense screw thread fin, rectangle fin or the sawtooth (4-1) of measure; When described loop circuit heat pipe is used for the following warm area of 200K, also be added with air reservoir (6) on the heat pipe loop, air reservoir (6) is connected on the gas line (5).
2. a kind of miniaturized loop heat pipe according to claim 1, it is characterized in that: normal temperature use or ground on when low temperature uses, evaporator shell (1-2) and condenser (4) use red copper, aluminium or aluminum alloy materials, and liquid pool (2), liquid line (3), gas line (5) use stainless steel material; When using in the low temperature environment of space, evaporimeter (1), liquid pool (2), condenser (4), liquid line (3), gas line (5) use same material metal or thermal coefficient of expansion to change little metal, and outer surface is gold-plated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910197303 CN101672592B (en) | 2009-10-16 | 2009-10-16 | Miniaturized loop heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910197303 CN101672592B (en) | 2009-10-16 | 2009-10-16 | Miniaturized loop heat pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101672592A CN101672592A (en) | 2010-03-17 |
| CN101672592B true CN101672592B (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910197303 Active CN101672592B (en) | 2009-10-16 | 2009-10-16 | Miniaturized loop heat pipe |
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| CN (1) | CN101672592B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012049752A1 (en) * | 2010-10-14 | 2012-04-19 | 富士通株式会社 | Loop-shaped heat pipe and electronic device |
| CN102419123B (en) * | 2011-12-15 | 2013-02-13 | 华南理工大学 | Anti-gravity bubbling loop heat pipe |
| CN102980429A (en) * | 2012-12-13 | 2013-03-20 | 中国科学院大学 | Loop thermosyphon heat dissipation device |
| CN103673698B (en) * | 2013-11-21 | 2015-07-29 | 中国科学院上海技术物理研究所 | The loop heat pipe of condenser is made by axial-grooved heat pipe section |
| CN104121794B (en) * | 2014-07-25 | 2018-05-11 | 中国科学院工程热物理研究所 | A kind of unidirectional loop gravity assisted heat pipe and its manufacture method |
| 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 |
| CN106225535B (en) * | 2016-07-22 | 2018-12-21 | 北京空间机电研究所 | A kind of cylindrical type loop circuit heat pipe capillary pump assembly |
| CN109297329B (en) * | 2018-09-03 | 2020-07-14 | 北京空间机电研究所 | Channel heat pipe with circumferential channel and connecting method thereof |
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2009
- 2009-10-16 CN CN 200910197303 patent/CN101672592B/en active Active
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| Publication number | Publication date |
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| CN101672592A (en) | 2010-03-17 |
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