CN215572347U - Loop heat pipe - Google Patents
Loop heat pipe Download PDFInfo
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- CN215572347U CN215572347U CN202121786957.5U CN202121786957U CN215572347U CN 215572347 U CN215572347 U CN 215572347U CN 202121786957 U CN202121786957 U CN 202121786957U CN 215572347 U CN215572347 U CN 215572347U
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- capillary
- compensator
- heat pipe
- loop heat
- evaporator
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Abstract
A loop heat pipe comprises an evaporator, a vapor pipeline, a condenser, a liquid pipeline and a compensator, wherein the evaporator and the compensator share an external shell, and a second capillary core is arranged in the compensator; the first capillary core is positioned in the evaporator, and a first steam cavity and a second steam cavity are formed between the evaporator and the shell; the vapor line communicates the first vapor chamber to the condenser; the liquid line communicates the condenser to the compensator; a secondary line communicating the second vapor chamber to the condenser or communicating the second vapor chamber to the liquid line is also included. When the loop heat pipe works, the heat leakage from the evaporator to the compensator is reduced, the requirement on the supercooling degree is reduced, and the heat transmission performance of the loop heat pipe is improved.
Description
Technical Field
The present invention relates to a heat transfer device, and more particularly, to a loop heat pipe.
Background
Loop heat pipes are an advanced heat transfer element. When the loop heat pipe works, the pressure and the temperature of the evaporator are higher than those of the compensator, so that the evaporator leaks heat to the compensator. According to the working principle of the loop heat pipe, the heat needs to be offset by the supercooling degree of the return liquid so as to maintain the heat balance of the compensator. However, the temperature difference between the cold end and the hot end of the loop heat pipe is increased, and the heat transfer performance is deteriorated. Therefore, it is desirable to minimize this heat leakage. The heat conduction through the shell between the evaporator and the compensator and the loop heat pipe capillary wick is an important source of the above heat load, and therefore, reducing the heat conduction is of great significance in improving the heat transfer performance of the loop heat pipe.
Disclosure of Invention
In view of this, the present invention provides a loop heat pipe, which can reduce the heat leakage from the evaporator of the loop heat pipe to the compensator, and improve the heat transfer performance.
The utility model adopts the following technical scheme:
a loop heat pipe comprises an evaporator, a vapor pipeline, a condenser, a liquid pipeline and a compensator, and is characterized in that the evaporator and the compensator share an external shell, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell jointly define a closed chamber and are provided with a first capillary core, the closed chamber is divided into the evaporator and the compensator by the first capillary core, and the first capillary core is positioned in the evaporator; the first capillary core comprises a main part and a remainder part, the main part is far away from the compensator and forms a first steam cavity with the shell, and the remainder part is close to the compensator and forms a second steam cavity with the shell; a second capillary core is arranged in the compensator, and the second capillary core is in contact with or connected with the first capillary core;
the first capillary core isolates the second steam cavity from the first steam cavity so as to prevent gas-phase working medium from flowing between the second steam cavity and the first steam cavity, and the first capillary core isolates the second steam cavity from the compensator so as to prevent gas-phase working medium from flowing between the second steam cavity and the compensator;
the steam pipeline is used for communicating the first steam cavity with the condenser;
the liquid line communicates the condenser to the compensator; also comprises the following steps of (1) preparing,
a secondary line communicating the second vapor chamber to the condenser or communicating the second vapor chamber to the liquid line.
Optionally, the first capillary wick is an integral capillary structure, the rest of the first capillary wick is provided with a plurality of concave structures, and the plurality of concave structures are communicated with the casing through a groove to form the second steam cavity.
Optionally, the first capillary wick is a sintered powder body.
Optionally, the first capillary wick is formed by stacking a plurality of capillary structure layers.
Optionally, a through hole is formed in the capillary structure layer, at least part of the through holes in adjacent capillary structure layers are overlapped to form a through channel, a channel is formed in the capillary structure layer close to the upper shell or the lower shell, the channel is communicated with the through channel, and the channel and the shell form the second steam cavity.
Optionally, the material of the capillary structure layer is one or more layers of wire mesh, metal fiber felt or foam metal, and the plurality of layers of the capillary structure layer forming the first capillary core are the same or different in material.
Optionally, the second capillary wick is a part of the first capillary wick, and is formed by extending the remainder of the first capillary wick to the compensator.
Optionally, the second capillary wick is a separate capillary structure.
Optionally, the evaporator and the compensator are arranged horizontally or vertically.
Optionally, the shape of the main portion of the first capillary wick is a shape with a large surface area, such as a spade shape.
Compared with the prior art, when the loop heat pipe works, the heat leakage of the evaporator to the compensator along the shell and the heat leakage of the evaporator to the compensator along the first capillary core in the evaporator can cause the working medium to be vaporized in the second steam cavity, so that the heat load is absorbed, and the vaporized working medium enters the secondary pipeline, is condensed and finally returns to the compensator. Therefore, the requirement on the supercooling degree of the liquid working medium in the evaporator is obviously reduced, and the performance of the loop heat pipe is improved.
Drawings
FIG. 1 is a schematic view of a loop heat pipe according to an embodiment of the present invention;
FIG. 2 is a schematic view of the upper housing of FIG. 1 after opening;
fig. 3 is a schematic diagram of a first embodiment of a first capillary wick and a second capillary wick in the present invention;
fig. 4 is a schematic diagram of a second embodiment of the first capillary wick and the second capillary wick in the present invention;
fig. 5 is an exploded view of fig. 4.
In the above figures: 1-evaporator, 2-vapor line, 3-condenser, 4-liquid line, 5-compensator, 6-secondary line, 11-first capillary wick, 51-second capillary wick, 12-first vapor cavity, 13-second vapor cavity, 111-main part of first capillary wick, 112-remainder of first capillary wick, 110a, 110b, 110c, 110 d-capillary structure layer, 1121-concave structure, 1122-groove, 1123-through hole, 1124-through channel, 1125-channel, 100-shell, 101-upper shell, 102-lower shell.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
Referring to fig. 1 and fig. 2, a schematic diagram of a loop heat pipe according to an embodiment of the present invention is shown. It comprises an evaporator 1, a vapor line 2, a condenser 3, a liquid line 4, a compensator 5 and a secondary line 6. The evaporator 1 shares an outer casing 100 with the compensator 5, and the casing 100 includes an upper casing 101 and a lower casing 102. The upper shell 101 and the lower shell 102 form a closed chamber, a first capillary wick 11 is arranged in the closed chamber, and the first capillary wick 11 divides the closed chamber into the evaporator 1 and the compensator 5. The first capillary wick 11 comprises a main portion 111 of the first capillary wick and a remainder 112 of the first capillary wick. The main portion 111 of the first capillary wick is distant from the compensator 5 and the remainder 112 of the first capillary wick is close to the compensator 5.
The second capillary wick 51 is located inside the compensator 5. The first capillary wick 11 is in contact or connected with the second capillary wick 51.
The main portion 111 of the first capillary wick encloses a first vapor chamber 12 with the housing 100. The remainder 112 of the first wick encloses a second vapor chamber 13 with the housing 100. The vapor line 2 communicates the first vapor chamber 12 with the condenser 3, and the liquid line 4 communicates the condenser 3 with the compensator 5. In this embodiment, the secondary line 6 communicates the second steam chamber 13 with the condenser 3. But not limited to, the secondary line 6 may also connect the second vapor chamber 13 to the liquid line 4.
The shape of the main portion 111 of the first capillary wick is a shape having a large surface area, such as a spade shape.
In this embodiment, the evaporator 1 and the compensator 5 are horizontally arranged, but not limited to this, and the evaporator 1 and the compensator 5 may also be vertically arranged.
The basic working principle of the utility model is as follows: the lower shell 102 at the evaporator 1 is contacted with a heat source, so that the evaporator 1 absorbs heat, the working medium in the first steam cavity 12 is vaporized, the vaporized working medium enters the condenser 3 along the steam pipeline 2, releases heat and condenses in the condenser 3, returns to the compensator 5 along the liquid pipeline 4, and returns to the evaporator 1 under the capillary force of the first capillary wick 11 and the second capillary wick 51, thereby completing a cycle. Meanwhile, because the temperature and the pressure in the evaporator 1 are higher than those of the working medium in the compensator 5, the evaporator 1 conducts heat to the compensator 5 through the shell 100 and the first capillary core 11, when the heat is conducted to the second steam cavity 13, the working medium in the second steam cavity 13 is heated and vaporized, the heat is absorbed, then the gas-phase working medium flows into the condenser 3 along the secondary pipeline 6, after heat is released and condensed in the condenser 3, the gas-phase working medium returns to the compensator 5 along with the condensed working medium flowing through the steam pipeline 2 through the liquid pipeline 4, and returns to the evaporator 1 under the capillary force action of the first capillary core 11 and the second capillary core 51, so that a round of circulation is completed. In this way, the heat leakage of the evaporator 1 into the compensator 5 is significantly reduced. Thereby obviously reducing the supercooling degree requirement of the liquid working medium in the evaporator 1 and improving the performance of the loop heat pipe.
Referring to fig. 3, a schematic diagram of a first embodiment of a first capillary core and a second capillary core in the present invention is shown. The first capillary wick 11 is an integral capillary structure comprising a main portion 111 of the first capillary wick and a remainder 112 of the first capillary wick. The remainder 112 of the first capillary wick has a plurality of concave structures 1121, and the concave structures 1121 are connected together through grooves 1122 and enclose a second steam cavity 13 together with the casing 100 (not shown in the figure). The first capillary wick 11 can be a sintered powder body, but is not limited thereto. The second capillary wick 51 can be a portion of the first capillary wick 11 that is formed by the remainder 112 of the first capillary wick extending toward the compensator 5. But not limited thereto, the second capillary wick 51 can also be a separate capillary structure, and can be formed by sintering powder on the lower housing 102 (not shown in the figure) and contacting with the first capillary wick 11. The main portion 111 of the first capillary wick is in the shape of a tooth.
Referring to fig. 4 and 5, schematic diagrams of a second embodiment of the first capillary core and the second capillary core in the present invention are shown. The first capillary wick 11 is formed by stacking a plurality of capillary structure layers 110, and forms a main portion 111 of the first capillary wick and a remainder 112 of the first capillary wick. The capillary structure layer 110 has a plurality of through holes 1123, and the adjacent capillary structure layers such as the capillary structure layer 110b and the through holes 1123 of the capillary structure layer 110c are partially overlapped to form through channels 1124. The capillary structure layer 110a adjacent to the housing 100 (not shown) has a channel 1125, and the channel 1125 communicates with all the through passages 1124 and forms a second vapor chamber 13 with the housing 100. In this embodiment, the second capillary wick 51 is a part of the first capillary wick 11, and is formed by extending the capillary structure layer 110d close to the lower housing 102 (not shown in the figure) toward the compensator 5.
The material of the capillary structure layer 110 is one or more layers of wire mesh, metal fiber felt or foam metal. The capillary structure layers 110a, 110b, 110c and 110d may be made of the same or different materials.
The through holes 1123 of the adjacent capillary structure layers 110 are partially overlapped rather than completely overlapped, and the through channels 1124 formed by the through holes have larger surface area, can absorb more heat leakage from the first capillary cores 11 to the compensator 5, and has better effect.
By combining the above embodiments of the loop heat pipe, the heat leakage of the evaporator to the compensator through the shell and the capillary core can be remarkably reduced, and the heat transfer performance of the evaporator is improved.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the utility model are possible to those skilled in the art, without departing from the spirit and scope of the utility model.
Claims (10)
1. A loop heat pipe comprises an evaporator, a vapor pipeline, a condenser, a liquid pipeline and a compensator, and is characterized in that the evaporator and the compensator share an external shell, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell jointly define a closed chamber and are provided with a first capillary core, the closed chamber is divided into the evaporator and the compensator by the first capillary core, and the first capillary core is positioned in the evaporator; the first capillary core comprises a main part and a remainder part, the main part is far away from the compensator and forms a first steam cavity with the shell, and the remainder part is close to the compensator and forms a second steam cavity with the shell; a second capillary core is arranged in the compensator, and the second capillary core is in contact with or connected with the first capillary core;
the first capillary core isolates the second steam cavity from the first steam cavity so as to prevent gas-phase working medium from flowing between the second steam cavity and the first steam cavity, and the first capillary core isolates the second steam cavity from the compensator so as to prevent gas-phase working medium from flowing between the second steam cavity and the compensator;
the steam pipeline is used for communicating the first steam cavity with the condenser;
the liquid line communicates the condenser to the compensator; also comprises the following steps of (1) preparing,
a secondary line communicating the second vapor chamber to the condenser or communicating the second vapor chamber to the liquid line.
2. A loop heat pipe according to claim 1, wherein:
the first capillary core is of an integral capillary structure, the rest part of the first capillary core is provided with a plurality of concave structures, and the concave structures are communicated through a groove and form the second steam cavity with the shell.
3. A loop heat pipe according to claim 2, wherein:
the first capillary core is a powder sintered body.
4. A loop heat pipe according to claim 1, wherein:
the first capillary core is formed by stacking a plurality of capillary structure layers.
5. The loop heat pipe of claim 4, wherein:
the capillary structure layer is provided with a through hole, the through holes on the adjacent capillary structure layers are at least partially overlapped to form a through passage, the capillary structure layer close to the upper shell or the lower shell is provided with a channel, and the channel is communicated with the through passage and forms the second steam cavity with the shell.
6. A loop heat pipe according to claim 4 or 5, wherein:
the material of the capillary structure layer is one or more layers of wire meshes or metal fiber felts or foam metal, and the multiple layers of the capillary structure layer forming the first capillary core are the same or different in material.
7. A loop heat pipe according to claim 1, wherein:
the second capillary wick is a part of the first capillary wick and is formed by extending the rest of the first capillary wick to the compensator.
8. A loop heat pipe according to claim 1, wherein:
the second capillary core is of a single capillary structure.
9. A loop heat pipe according to claim 1, wherein:
the evaporator and the compensator are horizontally or vertically arranged.
10. A loop heat pipe according to claim 1, wherein:
the shape of the main portion of the first capillary wick is a shape having a large surface area, such as a spade shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121786957.5U CN215572347U (en) | 2021-08-03 | 2021-08-03 | Loop heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121786957.5U CN215572347U (en) | 2021-08-03 | 2021-08-03 | Loop heat pipe |
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| Publication Number | Publication Date |
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| CN215572347U true CN215572347U (en) | 2022-01-18 |
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| CN202121786957.5U Active CN215572347U (en) | 2021-08-03 | 2021-08-03 | Loop heat pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022183793A1 (en) * | 2021-03-01 | 2022-09-09 | 苏州圣荣元电子科技有限公司 | Thin plate type loop heat pipe |
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2021
- 2021-08-03 CN CN202121786957.5U patent/CN215572347U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022183793A1 (en) * | 2021-03-01 | 2022-09-09 | 苏州圣荣元电子科技有限公司 | Thin plate type loop heat pipe |
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