CN1328565C - Low temp loop heat pipe for deep low temp area - Google Patents
Low temp loop heat pipe for deep low temp area Download PDFInfo
- Publication number
- CN1328565C CN1328565C CNB2005100021085A CN200510002108A CN1328565C CN 1328565 C CN1328565 C CN 1328565C CN B2005100021085 A CNB2005100021085 A CN B2005100021085A CN 200510002108 A CN200510002108 A CN 200510002108A CN 1328565 C CN1328565 C CN 1328565C
- Authority
- CN
- China
- Prior art keywords
- evaporator
- condenser
- low temp
- pipe
- heat pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F28D15/04—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 tubes having a capillary structure
- F28D15/043—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 tubes having a capillary structure forming loops, e.g. capillary pumped loops
Landscapes
- 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)
Abstract
The present invention relates to a low temperature loop heat pipe for a deep low temperature area, which comprises a main evaporator, a condenser, a secondary evaporator and a gas cabin, wherein the main evaporator is connected in series with the evaporator into a loop, the condenser is composed of a red copper plate and a red copper pipe soldered on the red copper plate in a spiral shape, the main evaporator is a stainless steel pipe of which the inner hole surface is cut with axial groove channels, the inner hole of the stainless steel pipe is coaxially provided with cup-shaped porous structures sintered by stainless steel powder, the secondary evaporator is arranged on a condensing pipeline of the condenser, the secondary evaporator is a brass pipe or a brass pipe of which the inner hole surface is cut with axial groove channels, and the gas cabin is arranged on the condensing pipeline of the condenser and is close to one side of an evapour pipeline. Driving force generated by the main evaporator and the secondary evaporator during the work is the capillary force or the pressure generated during heating and evaporating a liquid working medium, and the driving force is irrelevant with the gravity and can be used for microgravity and zero gravity places. Simultaneously, the phase change heat transfer is also used. The present invention has good isothermal performance, and can realize the remote distance and small temperature difference heat transfer, improve the integrated relationship between a low temperature refrigeration machine and a cooled device and isolate the mechanical vibration and the electromagnetic interference from the refrigeration machine.
Description
Technical field
The invention belongs to refrigeration and cryogenic technique field, particularly a kind of space is with one of key technology in the low temperature integrated system: be used to the low temp loop heat pipe for deep low temp area 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 objective of the invention is to: 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.Cryogenic loop heat pipe provided by the invention has a secondary evaporator simple in structure, thereby makes its overall structure also comparatively simple.
Technical scheme of the present invention is as follows:
Low temp loop heat pipe for deep low temp area provided by the invention comprises:
Contact mutually successively and form a main evaporator 1, liquid transfer tube line 2, a condenser 11 and the vapor transmission pipeline 8 in loop; Described condenser 11 is by the condenser cold drawing and be the copper tube of spiral soldering on condenser cold drawing 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 3 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 in the air reservoir (7) on the side pipe line of the close vapor transmission pipeline (8) on the condensate line (3) of condenser (11).
Described liquid transfer tube line 2 and vapor transmission pipeline 8 are the flexible metal flexible pipe.
Described liquid transfer tube line 2 and vapor transmission pipeline 8 are flexible stainless-steel thin-wall pipe.
Secondary evaporator 5 is for the brass tube of band endoporus or for cutting the brass tube of axial slot on the bore area, its objective is the operation principle of utilizing the conduit heat pipe, when the heating secondary evaporator, produce certain pressure head, thereby promote one section condensate stream before the secondary evaporator 5 to main evaporator 1, thereby impel main evaporator 1 temperature can quicken to drop to below the critical-temperature of working medium; Main evaporator 1 is for being cut with the stainless steel tube of axial slot, the coaxial cup-shaped loose structure pipe 10 that is formed by the powder of stainless steel sintering that is placed with in its endoporus on the bore area; When main evaporator 1 temperature drops to operating temperature, just can heat main evaporator, so the liquid refrigerant in the loose structure pipe will be subjected to thermal evaporation, and formation gas-liquid interface, the pressure differential of these gas-liquid interface both sides is capillary pressure, this pressure differential drives the steam that produces in the main evaporator 1 and flows to condenser 11 by steam pipe line, promotes condensed condensate liquid simultaneously and flows back to the main evaporator 1 from liquid line; So constantly circulation just can be passed to condenser 11 to heat from main evaporator 1; What connect main evaporator 1 and condenser 11 is liquid line and vapor line, use all be the flexible stainless-steel thin-wall pipe of external diameter less (as 3mm); Air reservoir 7 is connected a side of close vapor transmission pipeline 8 on condenser 11 pipelines, and links to each other by an elongated tubular; Low temp loop heat pipe for deep low temp area provided by the invention has provided a kind of annexation between condenser 11, secondary evaporator 5 and air reservoir 7 entry positions, and such structural relation can make secondary evaporator play to impel effectively main evaporator to quicken the effect of cooling.
Low temp loop heat pipe for deep low temp area provided by the invention 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 make cryogenic loop heat pipe provided by the invention can be applied to the occasion of microgravity and zero-g.
Cryogenic loop heat pipe provided by the invention 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 an overall structure schematic diagram of the present invention;
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
The present invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is an overall structure schematic diagram of the present invention, and Fig. 2 and Fig. 3 are respectively the structure diagram of secondary evaporator 5 and main evaporator 1.As shown in Figure 1, low temp loop heat pipe for deep low temp area provided by the invention, comprise main evaporator 1, condenser 11[by a condensate line (copper tube) 3 spiral the back soldering on the condenser cold drawing (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 condensate line), main evaporator 1 and the condenser 11; Air reservoir 7 is connected on the condensate line 3 of condenser 11 side near condenser 11 outputs by steam pipe line 9; Condensate line 3 is to spiral the back soldering on a condenser cold drawing 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 pipe 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 condensate line 3 is liquid transfer tube line 2 and vapor transmission pipeline 8, all is the flexible stainless-steel thin-wall pipe of external diameter less (as 3mm).Air reservoir 7 is connected on the condensate line 3 a side near the condenser output, i.e. 6 places, position among Fig. 1 by a steam pipe line 9.
If adopt high purity nitrogen as hydraulic fluid, cryogenic loop heat pipe then provided by the invention 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 condensate line 3 directly contacts with condenser 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 condensate line 3 and the secondary evaporator 5 is liquefied.But because main evaporator 1 and 4 of condenser cold drawings have certain distance, the liquid transfer tube line 2 and the vapor transmission pipeline 8 that connect the two are again the less stainless-steel thin-wall pipes 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 condensate line 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 condensate line 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: cryogenic loop heat pipe provided by the invention has provided a kind of annexation between the position 6 in condensate line 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 condensate line 3 condensations by the position 6 in cup-shaped loose structure pipe 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 porous cup-shaped loose structure pipe 10 of liquid refrigerant.Under the driving of capillary force, the steam that produces in the main evaporator 1 will flow to condensate line 3 by vapor transmission pipeline 8.Simultaneously, the partial condensation liquid in the condensate line 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 (4)
1, a kind of low temp loop heat pipe for deep low temp area comprises:
Contact mutually successively and form a main evaporator (1), liquid transfer tube line (2), a condenser (11) and the vapor transmission pipeline (8) in loop; Described condenser (11) is by condenser cold drawing (4) and be the copper tube of spiral soldering on condenser cold drawing (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 (3) of condenser (11); Described secondary evaporator (5) is a brass tube;
Be installed in the air reservoir (7) on the side pipe line of the close vapor transmission pipeline (8) on the condensate line (3) of condenser (11).
2, low temp loop heat pipe for deep low temp area according to claim 1 is characterized in that: described secondary evaporator (5) is for cutting the brass tube of axial slot on the bore area.
3, low temp loop heat pipe for deep low temp area according to claim 1 is characterized in that: described liquid transfer tube line (2) and vapor transmission pipeline (8) are the flexible metal flexible pipe.
4, low temp loop heat pipe for deep low temp area according to claim 3 is characterized in that: described liquid transfer tube line (2) and vapor transmission pipeline (8) are flexible stainless-steel thin-wall pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100021085A CN1328565C (en) | 2005-01-13 | 2005-01-13 | Low temp loop heat pipe for deep low temp area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100021085A CN1328565C (en) | 2005-01-13 | 2005-01-13 | Low temp loop heat pipe for deep low temp area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651845A CN1651845A (en) | 2005-08-10 |
| CN1328565C true CN1328565C (en) | 2007-07-25 |
Family
ID=34875103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100021085A Active CN1328565C (en) | 2005-01-13 | 2005-01-13 | Low temp loop heat pipe for deep low temp area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1328565C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922814A (en) * | 2010-09-10 | 2010-12-22 | 江苏赫特节能环保有限公司 | Loop heat pipes for solar energy water heater |
| CN108426477A (en) * | 2018-04-13 | 2018-08-21 | 中国科学院理化技术研究所 | A kind of compact antigravity loop heat pipe |
| CN114593622A (en) * | 2022-02-25 | 2022-06-07 | 上海格熵航天科技有限公司 | Secondary loop part coupling type low-temperature loop heat pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227288B1 (en) * | 2000-05-01 | 2001-05-08 | The United States Of America As Represented By The Secretary Of The Air Force | Multifunctional capillary system for loop heat pipe statement of government interest |
| JP2003194485A (en) * | 2001-12-27 | 2003-07-09 | Mitsubishi Electric Corp | Evaporator, loop heat pipe with built-in reservoir, and heat transport method |
| US20040182550A1 (en) * | 2000-06-30 | 2004-09-23 | Kroliczek Edward J. | Evaporator for a heat transfer system |
-
2005
- 2005-01-13 CN CNB2005100021085A patent/CN1328565C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227288B1 (en) * | 2000-05-01 | 2001-05-08 | The United States Of America As Represented By The Secretary Of The Air Force | Multifunctional capillary system for loop heat pipe statement of government interest |
| US20040182550A1 (en) * | 2000-06-30 | 2004-09-23 | Kroliczek Edward J. | Evaporator for a heat transfer system |
| JP2003194485A (en) * | 2001-12-27 | 2003-07-09 | Mitsubishi Electric Corp | Evaporator, loop heat pipe with built-in reservoir, and heat transport method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1651845A (en) | 2005-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1328566C (en) | Deep cold loop heat tube | |
| Vasiliev | Heat pipes in modern heat exchangers | |
| CN108962484B (en) | phase-change heat-exchange supercooling box for superconducting cable, cooling system and cooling method | |
| US20040206479A1 (en) | Heat transfer system | |
| CN108253830B (en) | Loop heat pipe with auxiliary infusion pipeline | |
| CN110030860B (en) | Double-lead-tube type double-liquid-reservoir loop heat pipe | |
| CN102109257A (en) | Low-temperature loop heat pipe device | |
| CN2767942Y (en) | Low-temperature loop heat pipe for deep low temperature area | |
| CN103256841B (en) | A kind of energy storage heat abstractor | |
| CN108253829B (en) | Loop heat pipe driven by micro-channel array | |
| CN108267036A (en) | The loop heat pipe of micro-channel structure auxiliary drive | |
| CN2788115Y (en) | Deep cryogenic loop heat pipe for cryogenic integrated system | |
| CN100344930C (en) | Gravity assisted low temp loop heat pipe for deep low temp area | |
| CN1328565C (en) | Low temp loop heat pipe for deep low temp area | |
| CN108286911A (en) | Cryogenic loop heat pipe | |
| CN114857963A (en) | Tesla valve condenser low temperature loop heat pipe | |
| CN208398694U (en) | Cryogenic loop heat pipe | |
| WO2004040218A9 (en) | Heat transfer system | |
| CN102865762A (en) | Split type multi-stage heat pipe system | |
| CN111102866A (en) | Heat pipe capable of synchronously controlling auxiliary phase change | |
| CN2788114Y (en) | Gravity aided cryogenic loop heat pipe for deep cryogenic region | |
| CN207881541U (en) | Loop heat pipe with assisted transfusion pipeline | |
| KR200242427Y1 (en) | A triple-pipe type heat exchanger adopting high efficiency heat-medium radiator and a boiler adopting the same | |
| CN111059943A (en) | Inner sleeve heat exchange loop heat pipe capable of refrigerating and heating | |
| CN208171078U (en) | A kind of microwell array loop heat pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |