CN201754050U - Flat plate type loop hot pipe - Google Patents
Flat plate type loop hot pipe Download PDFInfo
- Publication number
- CN201754050U CN201754050U CN2010202965336U CN201020296533U CN201754050U CN 201754050 U CN201754050 U CN 201754050U CN 2010202965336 U CN2010202965336 U CN 2010202965336U CN 201020296533 U CN201020296533 U CN 201020296533U CN 201754050 U CN201754050 U CN 201754050U
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- heat pipe
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Abstract
A flat plate type loop hot pipe relates to the heat radiation of a component, which is used for avoiding the problem that the startup of the existing loop hot pipe is in failure caused by generating liquid working substance phase change in an evaporator liquid compensate cavity of the existing loop hot pipe. The flat plate type loop hot pipe comprises an evaporator and a condenser, a working substance outlet of the evaporator is communicated with a working substance inlet of the condenser by a steam pipeline, a working substance outlet of the condenser is communicated with a working substance inlet of the evaporator by a liquid pipeline, wherein, the evaporator comprises a flat plate type heated wall surface and a housing, a capillary core is provided on the heated wall surface, the capillary core can be covered by the housing, a liquid compensating cavity is provided above the capillary core, the liquid compensating cavity is used for accommodating the working substance and is connected with the liquid pipeline by the working substance entrance; a phase-change material layer is provided in the wall of the housing. According to the utility model, the back leakage heat and the side wall conduction heat of the evaporator can be adsorbed by the phase change heat absorption of the phase-change material, thereby effectively inhibiting the bubble generation in the liquid compensating cavity and ensuring the successful startup of the loop hot pipe.
Description
Technical field
The utility model relates to the heat radiation of components and parts, a kind of flat type loop heat pipe of concrete finger.
Background technology
Loop circuit heat pipe is that a kind of dependence capillary draft drives the working medium circulation, and the cyclic system that utilizes Working fluid phase changing to conduct heat is a kind of separated heat pipe that is come by the general heat pipe development.Compare with general heat pipe, the difference of loop circuit heat pipe is: its wick structure only is present in the evaporimeter, and evaporimeter and condenser are separated.Like this, steam pipework and liquid line just can be arranged arbitrarily, so loop circuit heat pipe has range of application widely.In addition, loop circuit heat pipe has that heat-transfer capability is strong, isothermal good, transmission range is long and the safety coefficient advantages of higher, is a kind of desirable heat abstractor.
Further, it is more reasonable than adopting traditional column type evaporimeter that loop circuit heat pipe adopts plate evaporator, and its reason is: (1) plate evaporator simple and compact for structure, be convenient to install; (2) wall surface temperature of plate evaporator is more even, helps realizing the more heat radiation of high heat flux; (3) plate evaporator more helps connecting with heat radiation elements.
Yet, flat type loop heat pipe is because the special construction of its evaporimeter, and heat conduction and sidewall heat conduction are more serious dorsad to cause it, even under very little thermic load condition, also because the leakage heat dorsad of evaporimeter makes Working fluid phase changing taking place in its compensating liquid chamber, and then causes loop circuit heat pipe to start failure easily.
The utility model content
The purpose of this utility model is to provide a kind of flat type loop heat pipe, can effectively avoid owing to the loop circuit heat pipe startup failure that the liquid working substance phase transformation causes takes place in the compensating liquid chamber of its evaporimeter.
For achieving the above object, a kind of flat type loop heat pipe that the utility model provides comprises evaporimeter and condenser, the sender property outlet of described evaporimeter is communicated with by steam pipework with the working medium of condenser inlet, and the sender property outlet of described condenser is communicated with by liquid line with the working medium of evaporimeter inlet.Wherein: described evaporimeter comprises flat heated wall surface and housing, described heated wall surface is provided with capillary wick, described housing covers capillary wick and be provided with the compensating liquid chamber above capillary wick, and the compensating liquid chamber is used to hold working medium and links to each other with described liquid line by the working medium inlet; Be provided with phase-change material layers in the wall of described housing.
Further, in the described phase-change material layers solid-liquid phase change temperature of phase-change material than low 2～5 ℃ of the boiling point of working medium under operating pressure.
Preferably, in the described phase-change material layers solid-liquid phase change temperature of phase-change material than low 2～3 ℃ of the boiling point of working medium under operating pressure.
The base area in the area of described phase-change material layers and described compensating liquid chamber is suitable.
The thickness of described phase-change material layers is 3～5mm.
Can be between described housing and the heated wall surface by sealing of O type circle or welded seal.
Described condenser is preferably the condenser of fin-tube type.
The outside of described condenser also is provided with cooling fan, is used for the working medium of cooler condenser.
The beneficial effects of the utility model are: by in the wall of housing phase-change material layers being set, the heat of leakage dorsad and the sidewall heat conduction of evaporimeter have been absorbed by the decalescence of phase-change material, thereby the bubble that has effectively suppressed in the compensating liquid chamber generates, and has guaranteed that loop circuit heat pipe starts smoothly; After loop circuit heat pipe started smoothly, the condensation working medium of backflow not only can suppress the air bubble growth in the compensating liquid chamber, also made phase-change material become solid phase by liquid phase again simultaneously, had guaranteed the stable operation of whole system.In a word, the utility model can be avoided effectively owing to the loop circuit heat pipe startup inefficacy that the liquid working substance phase transformation causes takes place in the compensating liquid chamber of its evaporimeter.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1;
Fig. 3 is the B-B cutaway view Amplified image of Fig. 1;
Among the figure, 1-evaporimeter (wherein: 1.1-heated wall surface, 1.2-housing, 1.3-capillary wick, 1.4-compensating liquid chamber, 1.5-O type circle, 1.6-phase-change material layers), the 2-steam pipework, the 3-condenser, the 4-liquid line, the 5-cooling fan, 6-working medium charges mouth.
The specific embodiment
Below in conjunction with the drawings and specific embodiments flat type loop heat pipe of the present utility model is described in further detail:
As shown in Figure 1 to Figure 3, flat type loop heat pipe of the present utility model comprises evaporimeter 1 and condenser 3.The sender property outlet of evaporimeter 1 is communicated with by steam pipework 2 with the working medium inlet of condenser 3, the working medium inlet of the sender property outlet of condenser 3 and evaporimeter 1 is communicated with by liquid line 4, thereby constituted the duplex matter system of " evaporimeter 1---steam pipework 2---condenser 3---liquid line 4---evaporimeter 1 ".In addition, on liquid line 4, also be provided with working medium and charge mouth 6.Wherein:
Table one
Table one provides is boiling temperature under the mark condition of several working medium, and under working condition, ammonia is to move under barotropic state, and its boiling point is than boiling point height under the mark condition; Acetone, methyl alcohol move under negative pressure state, and its boiling point is lower than boiling point under the mark condition.So the solid-liquid phase change temperature that still satisfies phase-change material in the reality is than low 2～3 ℃ of the boiling point of corresponding working medium under actual working pressure.Among several groups of embodiment of table one, all selected the paraffin class phase-change material for use, its reason be the latent heat of phase change of paraffin class phase-change material big and in the loop circuit heat pipe operating temperature range physics, stable chemical performance.In the reality, the phase-change material of selecting for use is not limited to the foregoing description, as long as the solid-liquid phase change temperature of phase-change material is more lower slightly at the boiling point under the operating pressure than corresponding working medium.
Operation principle of the present utility model is as follows:
The heated wall surface 1.1 of evaporimeter 1 is attached on the components and parts to be dispelled the heat, emits heat during components and parts work, liberated heat conducts to capillary wick 1.3 by heated wall surface 1.1, and heated wall surface 1.1 will at first be heated with the working medium between the capillary wick 1.3 and become gas mutually.Simultaneously, heat imports compensating liquid chamber 1.4 along the limit of housing 1.2 wall and capillary wick 1.3, and the phase-change material layers 1.6 in housing 1.2 upper walls absorbs the heat that conducts to compensating liquid chamber 1.4, guarantees not undergo phase transition in the compensating liquid chamber 1.4; When the heat that absorbs makes capillary wick 1.3 produce enough capillary forces, capillary wick 1.3 drives whole loop and brings into operation, that is: gas working medium enters condenser 3 by steam pipework 2, and in condenser 3, be condensed into liquid, worker quality liquid in the condenser 3 is back to the compensating liquid chamber 1.4 of evaporimeter 1 under the capillary force of capillary wick 1.3 drives.The bubble that the condensation working medium that refluxes will suppress in the compensating liquid chamber 1.4 more generates, grows, simultaneously, the condensation working medium that refluxes can make the phase-change material in the phase-change material layers 1.6 become solid phase by liquid phase, is beneficial to finish the smooth startup and the periodic duty of loop circuit heat pipe.On the other hand, increased phase-change material layers 1.6 after, loop circuit heat pipe can start under lower thermic load condition, reduced " the startup threshold value " of loop circuit heat pipe, has widened the thermic load scope that loop circuit heat pipe is suitable for.
When the heat dissipation capacity of components and parts raise suddenly, the leakage dorsad of evaporimeter 1 heat and limit wall heat conduction also can jump.The working medium that thereby phase-change material layers 1.6 also will absorb in the heat maintenance compensating liquid chamber 1.4 this moment do not undergo phase transition.The evaporimeter 1 that is provided with phase-change material layers 1.6 guarantees that it is the key of the normal operation of loop circuit heat pipe that compensating liquid chamber 1.4 interior working medium are stablized, so can effectively strengthen the stability of flat type loop heat pipe operation.
Claims (8)
1. flat type loop heat pipe, comprise evaporimeter (1) and condenser (3), the sender property outlet of described evaporimeter (1) is communicated with by steam pipework (2) with the working medium inlet of condenser (3), the sender property outlet of described condenser (3) is communicated with by liquid line (4) with the working medium inlet of evaporimeter (1), it is characterized in that: described evaporimeter (1) comprises flat heated wall surface (1.1) and housing (1.2), described heated wall surface (1.1) is provided with capillary wick (1.3), described housing (1.2) covers capillary wick (1.3) and is provided with compensating liquid chamber (1.4) in capillary wick (1.3) top, and compensating liquid chamber (1.4) are used to hold working medium and link to each other with described liquid line (4) by the working medium inlet; Be provided with phase-change material layers (1.6) in the wall of described housing (1.2).
2. flat type loop heat pipe according to claim 1 is characterized in that: the solid-liquid phase change temperature of phase-change material is than low 2～5 ℃ of the boiling point of working medium under operating pressure in the described phase-change material layers (1.6).
3. flat type loop heat pipe according to claim 2 is characterized in that: the solid-liquid phase change temperature of phase-change material is than low 2～3 ℃ of the boiling point of working medium under operating pressure in the described phase-change material layers (1.6).
4. according to the described flat type loop heat pipe of arbitrary claim in the claim 1 to 3, it is characterized in that: the base area in the area of described phase-change material layers (1.6) and described compensating liquid chamber (1.4) is suitable.
5. according to the described flat type loop heat pipe of arbitrary claim in the claim 1 to 3, it is characterized in that: the thickness of described phase-change material layers (1.6) is 3～5mm.
6. flat type loop heat pipe according to claim 1 is characterized in that: seal or welded seal by O type circle (1.5) between described housing (1.2) and the heated wall surface (1.1).
7. flat type loop heat pipe according to claim 1 is characterized in that: described condenser (3) is the condenser of fin-tube type (3).
8. according to claim 1 or 7 described flat type loop heat pipes, it is characterized in that: the outside of described condenser (3) also is provided with cooling fan (5), is used for the working medium of cooler condenser (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202965336U CN201754050U (en) | 2010-08-19 | 2010-08-19 | Flat plate type loop hot pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202965336U CN201754050U (en) | 2010-08-19 | 2010-08-19 | Flat plate type loop hot pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754050U true CN201754050U (en) | 2011-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202965336U Expired - Lifetime CN201754050U (en) | 2010-08-19 | 2010-08-19 | Flat plate type loop hot pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754050U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900504A (en) * | 2010-08-19 | 2010-12-01 | 中冶南方工程技术有限公司 | Flat type loop heat pipe |
| CN102853701A (en) * | 2012-09-27 | 2013-01-02 | 华东理工大学 | Evaporator for loop heat pipe and application of evaporator |
| CN105222631A (en) * | 2015-11-04 | 2016-01-06 | 天津商业大学 | A kind of loop circuit heat pipe composite liquid sucking core |
| CN105222630A (en) * | 2015-11-04 | 2016-01-06 | 天津商业大学 | A kind of flat type loop heat pipe |
| CN112179190A (en) * | 2020-09-29 | 2021-01-05 | 西安交通大学 | Ultrathin flat-plate loop heat pipe of coupling ejector |
| CN116336847A (en) * | 2023-03-21 | 2023-06-27 | 山东大学 | Loop heat pipe and manufacturing method thereof |
-
2010
- 2010-08-19 CN CN2010202965336U patent/CN201754050U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900504A (en) * | 2010-08-19 | 2010-12-01 | 中冶南方工程技术有限公司 | Flat type loop heat pipe |
| CN101900504B (en) * | 2010-08-19 | 2012-11-14 | 中冶南方工程技术有限公司 | Flat type loop heat pipe |
| CN102853701A (en) * | 2012-09-27 | 2013-01-02 | 华东理工大学 | Evaporator for loop heat pipe and application of evaporator |
| CN102853701B (en) * | 2012-09-27 | 2014-06-25 | 华东理工大学 | Evaporator for loop heat pipe and application of evaporator |
| CN105222631A (en) * | 2015-11-04 | 2016-01-06 | 天津商业大学 | A kind of loop circuit heat pipe composite liquid sucking core |
| CN105222630A (en) * | 2015-11-04 | 2016-01-06 | 天津商业大学 | A kind of flat type loop heat pipe |
| CN112179190A (en) * | 2020-09-29 | 2021-01-05 | 西安交通大学 | Ultrathin flat-plate loop heat pipe of coupling ejector |
| CN116336847A (en) * | 2023-03-21 | 2023-06-27 | 山东大学 | Loop heat pipe and manufacturing method thereof |
| CN116336847B (en) * | 2023-03-21 | 2024-02-23 | 山东大学 | Loop heat pipe and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110302 Effective date of abandoning: 20130227 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110302 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |