CN2767942Y - Low-temperature loop heat pipe for deep low temperature area - Google Patents
Low-temperature loop heat pipe for deep low temperature area Download PDFInfo
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- CN2767942Y CN2767942Y CN 200520000940 CN200520000940U CN2767942Y CN 2767942 Y CN2767942 Y CN 2767942Y CN 200520000940 CN200520000940 CN 200520000940 CN 200520000940 U CN200520000940 U CN 200520000940U CN 2767942 Y CN2767942 Y CN 2767942Y
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Abstract
The utility model relates to a low-temperature loop heat pipe for deep low temperature areas, which comprises a main evaporator, a condenser, a secondary evaporator and a gas library, wherein the condenser is connected in series with the main evaporator to form a loop. The condenser is composed of a red copper plate and a red copper pipe which is soldered on the red copper plate with tin in a spiral shape. The main evaporator is a stainless steel pipe, wherein the surface of an inner hole of which is cut with an axial groovy channel. The inner hole is arranged in a coaxial mode and is a cup-shaped porous structure sintered by stainless steel powder. The secondary evaporator is arranged on a condensing pipe line of the condenser, and is a brass pipe or a brass pipe, wherein the surface of an inner hole of which is cut with an axial groovy channel. The gas library is arranged at one side, on the condensing pipe line of the condenser, adjacent to a steam pipe line. Driving force generated by the work of the main and the secondary evaporators is capillary force generated when a liquid working substance is heated to evaporate, or a press head and is irrelevant to gravity. The utility model can be used in occasions with microgravity and zero gravity; simultaneously, phase change is also utilized to transmit heat. The utility model has good isothermal performance, and realizes heat transmission of long distance and small temperature difference. The low-temperature loop heat pipe improves the integrated relation between a low temperature refrigeration machine and a cooled device, and isolates mechanical vibration and electromagnetic interference from the refrigeration machine.
Description
Technical field
The utility model belongs to refrigeration and cryogenic technique field, and particularly a kind of space is with one of key technology in the low temperature integrated system: be used to the cryogenic loop heat pipe that is used for the profound hypothermia district a kind of simple in structure that improves Cryo Refrigerator and be cooled the device integrated relationship.
Background technology
21 century is the century of space technology and superconductor technology great development, and the application of Refrigeration Technique will more extensively be goed deep into.At present, the low-temperature receiver of infrared detector and high-temperature superconductive device mainly is the micro low-temperature refrigeration machine.Several aspects of the current required improvement of Refrigeration Technique are except comprising: improve refrigerating capacity, weight reduction, improve efficient and cryogenic property and the life-saving, also should develop the low temperature integrated technology refrigeration machine and the device that is cooled are integrated effectively.In current and later system's design and using, need more and more significantly to consider that the redundant and remote cold of refrigeration machine transmits some problems like this.Thereby, should regard cryogenic applications as a system, rather than the simple mixing of device.The low temperature integrated technology is separated from the refrigeration machine technology, and purpose is in order to strengthen the ability of refrigeration system.
Current, the common method that connects the refrigeration machine and the device that is cooled is to carry out the heat conduction with copper rod, and its shortcoming is when hot transmission range is elongated, and the two ends temperature difference can be subjected to the restriction of heat conduction cross-sectional area.In order under the same temperature difference, to transmit more heat, just need to seek other heat-transferring method.As everyone knows, a kind of so just effective heat-transfer equipment of heat pipe is the principle of phase-change heat transfer because its utilizes, so can transmit more heat under the less temperature difference.Though the structure of conventional heat pipe is comparatively simple, it also is not suitable for remote heat transmission, can not avoid Cryo Refrigerator to the mechanical oscillation of device generation and the influence of electromagnetic interference of being cooled.
Loop heat pipe with the difference of conventional heat pipe is: it has separated flowing of gas-liquid two-phase, and only be placed in the evaporimeter in order to the loose structure that capillary force is provided, thereby can adopt the minimum loose structure of pitch-row (several micron) that great capillary pressure is provided, and reduced working medium pressure drop of flow in transfer line simultaneously, thereby make this equipment can grow distance, a large amount of heats of little temperature difference ground transmission; And owing to all do not use the imbibition core in its steam and the liquid line, therefore can (1.5～3mm) realize arranging quite flexibly with minimum pipeline.Loop heat pipe is since the invention of eighties of last century the 80s and 90s, because its particular structure and superior performance, just be subjected to personage of boundary and spacecraft development person's the attention of conducting heat, and become the tool technology with broad prospects for development of a kind of advanced person in the spacecraft thermal control system.But, then require to provide for various optical devices the low-temperature working environment (100K is following) of deep cooling with Cryo Refrigerator along with the development of space exploration technology and refrigeration machine technology.Thereby be that the normal temperature loop heat pipe of working medium can not satisfy this requirement with ammonia (freezing point 195K).
Summary of the invention
The purpose of this utility model is: in order to improve Cryo Refrigerator and the integrated relationship between device of being cooled, and provide a kind of space cryogenic loop heat pipe that is operated in profound hypothermia district (liquid nitrogen temperature and following warm area thereof).It is a kind ofly can adapt to that use in the space, remotely transferring equipment efficiently, and can solve refrigeration machine effectively and the isolation technics between device of being cooled, thereby effectively suppresses mechanical oscillation and electromagnetic interference from refrigeration machine.While so have good isothermal, can solve the problem that makes the reduction of refrigeration machine efficient greatly owing to the temperature difference between Cooling and Heat Source owing to the cryogenic loop heat pipe utilization also is the principle of phase-change heat transfer.The cryogenic loop heat pipe that the utility model provides has a secondary evaporator simple in structure, thereby makes its overall structure also comparatively simple.
The technical solution of the utility model is as follows:
The cryogenic loop heat pipe that is used for the profound hypothermia district that the utility model provides comprises: a main evaporator 1 and connect with main evaporator 1 by liquid line 2, and pass through a condenser 11 in steam pipe line 8 formation loops; Described condenser 11 is by a copper plate 4 and be the copper tube of spiral soldering on copper plate 4 and form; Described main evaporator 1 is for being cut with the stainless steel tube of axial slot, the cup-shaped loose structure pipe 10 that coaxial placement is formed by the powder of stainless steel sintering in its endoporus on the bore area; It is characterized in that, also comprise:
Be installed in the secondary evaporator 5 on the condensate line of condenser 11; Described secondary evaporator 5 is a brass tube or is the brass tube of cutting axial slot on the bore area; With
Be installed on the condensate line of condenser 11 near the air reservoir 7 on the side pipe line of steam pipe line.
Described connection liquid line 2 and steam pipe line 8 are the flexible metal flexible pipe.Described connection liquid line 2 and steam pipe line 8 are flexible stainless-steel thin-wall pipe.
The cryogenic loop heat pipe that is used for the profound hypothermia district that the utility model provides utilizes the evaporation of working medium and the phase transition process that condenses transmits heat, thereby is a kind of heat-transfer equipment efficiently, can work under liquid nitrogen temperature and even lower profound hypothermia district.Its loop comprises a main evaporator (device directly contacts with being cooled) that absorbs the low temperature thermic load, also has one heat discharged condenser (directly contacting with the refrigeration machine cold junction) to the refrigeration machine cold junction.Main evaporator and condenser link to each other by flexible length thin tube (as stainless steel tube or metal hose), for the Cryo Refrigerator cold junction with the heat and the vibration isolation that are cooled and provide good between device, and make that the layout of cold and heat source is more flexible.In addition, because this low temp loop heat pipe for deep low temp area is operated in the profound hypothermia district, therefore also need consider following two problems: on the one hand, profound hypothermia working medium such as needs employing nitrogen are as working fluid, yet liquid profound hypothermia working medium has arrived normal temperature pressure under the situation of constancy of volume will be up to the hundreds of kilogram, in order to ensure the safety under the normal temperature, just the air reservoir of a big volume of needs use reduces the pressure under the normal temperature; On the other hand, because (promptly being cooled between device and the refrigeration machine cold junction) has certain distance between main evaporator and condenser, and what connect the two is the length thin tube of inner wall smooth, only allowing main evaporator be reduced to operating temperature from normal temperature by conductive force will need considerable time, thereby need to adopt secondary evaporator to accelerate the temperature-fall period of main evaporator.Because pressure head or capillary force that the driving force that produces during the primary and secondary evaporator operation is a liquid refrigerant to be produced when being subjected to thermal evaporation, with gravitational independent, and the cryogenic loop heat pipe that makes the utility model provide can be applied to the occasion of microgravity and zero-g.
The cryogenic loop heat pipe that is used for the profound hypothermia district that the utility model provides mainly is devoted to the space cryogenic applications of Cryo Refrigerator, can improve Cryo Refrigerator effectively and the integrated relationship between device of being cooled, and can avoid mechanical oscillation and electromagnetic interference from Cryo Refrigerator.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is the cross sectional view of secondary evaporator 5;
Fig. 3 is the structural representation of main evaporator 1;
Fig. 4 is the A-A generalized section of Fig. 3.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described further:
Fig. 1 is an overall structure schematic diagram of the present utility model, and Fig. 2 and Fig. 3 are respectively the structure diagram of secondary evaporator 5 and main evaporator 1.As shown in Figure 1, the cryogenic loop heat pipe that is used for the profound hypothermia district that the utility model provides, comprise main evaporator 1, condenser 11 (by a copper tube 3 spiral the back soldering on the copper sheet 4 and form), form the loop by liquid transfer tube line 2 and vapor transmission pipeline 8 between secondary evaporator 5 (being installed on the pipeline of copper tube 3), main evaporator 1 and the condenser 11; Air reservoir 7 is connected on the copper tube 3 of condenser 11 side near steam pipe line by steam pipe line 9; Condenser pipeline 3 is to spiral the back soldering on a copper sheet 4 and form by one meter copper tube how long; The secondary evaporator 5 that is connected on the condenser pipeline is brass tubes (perhaps being the smooth pipe of bore area) of cutting axial slot on the bore area, and its structure diagram as shown in Figure 2.Main evaporator 1 is the stainless steel tube that is cut with axial slot on the endoporus table, the coaxial cup-shaped loose structure 10 that forms by the powder of stainless steel sintering that is placed with in its endoporus, and Fig. 3 has provided the structure diagram of main evaporator 1.What connect between main evaporator 1 and the condenser pipeline 3 is liquid line 2 and vapor line 8, all is the flexible stainless-steel thin-wall pipe of external diameter less (as 3mm).Air reservoir 7 is connected on the condenser pipeline 3 a side near steam pipe line 8, i.e. 6 places, position among Fig. 1 by an elongated tubular 9.
If adopt high purity nitrogen as hydraulic fluid, the cryogenic loop heat pipe that is used for the profound hypothermia district that then the utility model provides can be operated in liquid nitrogen temperature, only needs to use Cryo Refrigerator that condenser cold drawing 4 is cooled to and maintains 78K in the case and gets final product.As shown in Figure 1, cryogenic loop heat pipe integral body is in (as room temperature 273K) under the environment temperature during beginning.After using Cryo Refrigerator that condenser cold drawing 4 is cooled to 78K, because condenser pipeline 3 directly contacts with cold drawing 4, and secondary evaporator 5 is the higher brass tubes of thermal conductivity, so by the effect of heat conduction the working medium in condenser pipeline 3 and the secondary evaporator 5 is liquefied.But because main evaporator 1 and 4 of condenser cold drawings have certain distance, the transfer line 2 and 8 that connects the two is again the less stainless-steel thin-wall pipe of thermal conductivity, thereby this moment, main evaporator 1 still was in higher temperature.The occasion of using in the space that does not have the gravity booster action, only allowing the temperature of main evaporator 1 drop to operating temperature by conductive force will need the long time, thereby be necessary to adopt secondary evaporator 5 to shorten the temperature-fall period of main evaporator.
After the liquefaction of the working medium in condenser pipeline 3 and the secondary evaporator 5, just secondary evaporator 5 can be heated, after the working medium in the secondary evaporator 5 is subjected to thermal evaporation, certain pressure head will be produced, promote its one section condensate stream in front to main evaporator 1, thereby make main evaporator 1 fast cooling.This part working medium of having evaporated is will condensation once more in secondary evaporator 5 this section condenser pipelines 3 in front when main evaporator 1 direction flows.Simultaneously, the condensate liquid behind the secondary evaporator 5 will constantly replenish in secondary evaporator 5.Like this, by heating secondary evaporator 5, just can play the purpose of impelling main evaporator 1 fast cooling.It needs to be noted: the cryogenic loop heat pipe that is used for the profound hypothermia district that the utility model provides has provided a kind of annexation between the link position 6 in condenser pipeline 3, secondary evaporator 5 and air reservoir and loop, and such structural relation is not easy to dryout when secondary evaporator 5 is heated.Because when the condensate liquid behind the secondary evaporator 5 replenishes in secondary evaporator 5, residual gas in the air reservoir 7 will enter into 3 condensations of condenser pipeline by the link position 6 in tube connector 10 and air reservoir and loop, promote condensate liquid conversely again and in secondary evaporator 5, replenish, thereby guarantee that secondary evaporator 5 is difficult for dryouting.So can play the effect that impels main evaporator 1 to quicken cooling effectively by heating secondary evaporator 5.
Also reduce to below the critical-temperature of working medium when main evaporator 1 temperature after, cryogenic loop heat pipe has just entered normal operating conditions.At this moment, main evaporator 1 is the be cooled caloric value of device of absorption, just evaporation and produce certain capillary force on the gas-liquid interface in loose structure 10 of liquid refrigerant.Under the driving of capillary force, the steam that produces in the main evaporator 1 will flow to condenser pipeline 3 by steam pipe line 8.Simultaneously, the partial condensation liquid in the condenser pipeline 3 also can flow back in the main evaporator 1 under capillary force drives, and circulation so constantly relies on latent heat that heat is passed to condenser cold drawing 4 from main evaporator 1.Under normal operation mode, need not secondary evaporator 5 heating.
Claims (3)
1, a kind of cryogenic loop heat pipe that is used for the profound hypothermia district comprises:
One main evaporator (1) and connect with main evaporator (1) by liquid line (2), and pass through a condenser (11) in steam pipe line (8) formation loop; Described condenser (11) is by a copper plate (4) and be the copper tube of spiral soldering on copper plate (4) and form; Described main evaporator (1) is for being cut with the stainless steel tube of axial slot, the cup-shaped loose structure pipe (10) that coaxial placement is formed by the powder of stainless steel sintering in its endoporus on the bore area; It is characterized in that, also comprise:
Be installed in the secondary evaporator (5) on the condensate line of condenser (11); Described secondary evaporator (5) is a brass tube or is the brass tube of cutting axial slot on the bore area;
Be installed on the condensate line of condenser (11) near the air reservoir (7) on the side pipe line of steam pipe line.
2, low temp loop heat pipe for deep low temp area according to claim 1 is characterized in that: described connection liquid line (2) and steam pipe line (8) are the flexible metal flexible pipe.
3, low temp loop heat pipe for deep low temp area according to claim 2 is characterized in that: described connection liquid line (2) and steam pipe line (8) are flexible stainless-steel thin-wall pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000940 CN2767942Y (en) | 2005-01-18 | 2005-01-18 | Low-temperature loop heat pipe for deep low temperature area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000940 CN2767942Y (en) | 2005-01-18 | 2005-01-18 | Low-temperature loop heat pipe for deep low temperature area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2767942Y true CN2767942Y (en) | 2006-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520000940 Expired - Lifetime CN2767942Y (en) | 2005-01-18 | 2005-01-18 | Low-temperature loop heat pipe for deep low temperature area |
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| Country | Link |
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| CN (1) | CN2767942Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121803A (en) * | 2011-03-16 | 2011-07-13 | 中国科学院上海技术物理研究所 | Double-evaporator loop heat pipe in medium and low temperature region |
| CN103706910A (en) * | 2014-01-06 | 2014-04-09 | 中国原子能科学研究院 | Method for welding cooling water channel in radio frequency cavity area with high electric field gradient |
| CN107144160A (en) * | 2017-04-19 | 2017-09-08 | 北京空间飞行器总体设计部 | A kind of 160K that works in is to the double loop deep cooling loop circuit heat pipe of 220K warm areas |
| CN109387109A (en) * | 2018-11-21 | 2019-02-26 | 中国科学院上海技术物理研究所 | A kind of class spiral flow channel structure of loop heat pipe condenser |
| CN112983817A (en) * | 2021-03-10 | 2021-06-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body, compressor and air conditioner |
-
2005
- 2005-01-18 CN CN 200520000940 patent/CN2767942Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121803A (en) * | 2011-03-16 | 2011-07-13 | 中国科学院上海技术物理研究所 | Double-evaporator loop heat pipe in medium and low temperature region |
| CN102121803B (en) * | 2011-03-16 | 2012-06-27 | 中国科学院上海技术物理研究所 | Double-evaporator loop heat pipe in medium and low temperature region |
| CN103706910A (en) * | 2014-01-06 | 2014-04-09 | 中国原子能科学研究院 | Method for welding cooling water channel in radio frequency cavity area with high electric field gradient |
| CN103706910B (en) * | 2014-01-06 | 2016-06-22 | 中国原子能科学研究院 | The welding method of radio-frequency cavity height electric-force gradient region cooling water channel |
| CN107144160A (en) * | 2017-04-19 | 2017-09-08 | 北京空间飞行器总体设计部 | A kind of 160K that works in is to the double loop deep cooling loop circuit heat pipe of 220K warm areas |
| CN107144160B (en) * | 2017-04-19 | 2019-10-18 | 北京空间飞行器总体设计部 | A kind of double loop deep cooling loop circuit heat pipe working in 160K to 220K warm area |
| CN109387109A (en) * | 2018-11-21 | 2019-02-26 | 中国科学院上海技术物理研究所 | A kind of class spiral flow channel structure of loop heat pipe condenser |
| CN112983817A (en) * | 2021-03-10 | 2021-06-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body, compressor and air conditioner |
| CN112983817B (en) * | 2021-03-10 | 2022-08-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body, compressor and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150118 Granted publication date: 20060329 |