CN115218701A - Separation type gravity heat pipe capable of preventing steam from flowing back - Google Patents

Separation type gravity heat pipe capable of preventing steam from flowing back Download PDF

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Publication number
CN115218701A
CN115218701A CN202210888206.7A CN202210888206A CN115218701A CN 115218701 A CN115218701 A CN 115218701A CN 202210888206 A CN202210888206 A CN 202210888206A CN 115218701 A CN115218701 A CN 115218701A
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CN
China
Prior art keywords
liquid
evaporation section
steam
section
channel
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Pending
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CN202210888206.7A
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Chinese (zh)
Inventor
陈浩
项立银
唐文辉
戴书刚
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724th Research Institute of CSIC
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724th Research Institute of CSIC
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Priority to CN202210888206.7A priority Critical patent/CN115218701A/en
Publication of CN115218701A publication Critical patent/CN115218701A/en
Pending legal-status Critical Current

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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
    • F28D15/04—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
    • F28D15/046—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 characterised by the material or the construction of the capillary structure
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
    • H05K7/20336—Heat pipes, e.g. wicks or capillary pumps

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The invention discloses a separation type gravity assisted heat pipe capable of preventing steam from flowing back, which comprises an evaporation section, a condensation section, hollow fins, a liquid pipeline, a gas pipeline and a hinge, wherein the evaporation section comprises a main capillary core, a secondary capillary core, a liquid baffle, a steam baffle, a liquid channel, a steam channel, a liquid storage cavity and a liquid distribution pipe. The working medium is heated and evaporated in the evaporator, enters the condensation section to be condensed under the driving of capillary force, and the condensed liquid working medium flows back to the evaporation section under the combined action of the capillary force and gravity. The invention has simple structure, the liquid in the evaporation section directly enters the secondary capillary core, the liquid distribution pipe is jointed with the secondary capillary core, the vapor can not reversely flow back to the liquid distribution pipe through the capillary core, the vapor backflow is effectively prevented, the liquid storage cavity is positioned above the main capillary core in the evaporation section, the liquid can be timely supplemented to the main capillary core, the self-regulation can be carried out on the changing heat load, and the temperature fluctuation of the heating device is gentle.

Description

Separation type gravity heat pipe capable of preventing steam from flowing back
Technical Field
The invention belongs to the technical field of heat dissipation of electronic equipment, and particularly relates to a separation type gravity assisted heat pipe capable of preventing steam backflow.
Background
In the phase-change heat exchange technology, a heat pipe is an ideal heat transfer element, heat is transferred by utilizing evaporation and condensation of internal saturated working media, and a gravity heat pipe is one of the heat pipes. The gravity heat pipe is a heat pipe which can make condensed working medium return to an evaporation section by means of self gravity, and is structurally provided with the evaporation section, a heat insulation section and a condensation section from bottom to top in sequence, a proper amount of working medium is filled in the heat pipe, the working medium is heated by an external heat source at the evaporation section to generate phase change, and moves upwards at an accelerated speed under the action of pressure and buoyancy, flows to the condensation section to exchange heat with a cold source outside a pipe wall, is condensed and liquefied, and returns a liquid phase to the evaporation section by means of gravity to absorb heat again, and the circulation is repeated in such a way, so that heat is transferred to the upper condensation section from the bottom evaporation section. The gravity assisted heat pipe has the advantages of simple structure, convenient manufacture, economy, durability, excellent heat transfer characteristic, safe operation and the like, and is widely applied to various fields of industrial production. The separated gravity heat pipe is used as the deformation of the gravity heat pipe, the evaporation section and the condensation section of the gravity heat pipe are separated, and the vapor phase and the liquid phase in the pipe flow in the same direction, so that the occurrence of vapor-liquid shearing force is avoided. However, the separated gravity assisted heat pipe only depends on gravity or capillary force to drive the working medium to circularly flow in the separated gravity assisted heat pipe, and the gas-phase working medium generated in the evaporator easily flows back to the condensation section from the inlet of the evaporation section, so that the flow resistance is increased, and a steam plug can be formed in the liquid pipeline in serious cases to influence the performance of the heat pipe.
The separated gravity heat pipe has been studied, and reference 1 (Gong Yanfeng, sun Long, zhou Yaping. A separated solar heat pipe heating and hot water supply device and method CN 104296229B) proposes a separated solar heat pipe heating and hot water supply device and method, which utilize the natural circulation characteristic of the separated heat pipe to convey heat without power to meet the heating and hot water supply requirements, but the invention does not provide a corresponding solution for the steam reflux of the evaporation section. Compared with the prior art 2 (niubao, chef Liang Yan, yu Yingying, zeng Xianan. Split heat pipe flat plate solar indoor heating system CN104613531 a), the present invention provides a split heat pipe flat plate solar indoor heating system, wherein the condensing section of the split heat pipe is placed in an indoor heat dissipation device, the heat pipe working medium directly exchanges heat with indoor air, the evaporation section of the heat pipe is placed in a flat plate solar collector, the heat pipe working medium absorbs the solar energy temperature rise, becomes gas to enter the condensing section of the indoor heat pipe to release heat, the heat is released and then converted into liquid, and returns to the evaporation section by gravity, and the present invention also has the problem of gas reflux in the evaporation section.
Disclosure of Invention
In order to solve the problem of steam backflow existing in the traditional separation type gravity heat pipe, the invention provides the separation type gravity heat pipe capable of preventing the steam backflow, and the steam backflow from an inlet is inhibited through a gas-liquid separation technology under the capillary action.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a vapor backflow prevention split gravity heat pipe comprising: the device comprises an evaporation section 1, a condensation section 2, hollow fins 3, a liquid pipeline 4, a gas pipeline 5 and a hinge 6; the condensation section 2 comprises k condensation flow passages 7,k which are more than or equal to 2; the evaporation section 1 comprises a main capillary wick 8; the evaporation section 1 comprises a liquid baffle 9; the evaporation section 1 comprises a steam baffle 10; the evaporation section 1 comprises n liquid channels 11, wherein n is more than or equal to 2; the evaporation section 1 comprises m steam channels 12, and m is more than or equal to 2; the evaporation section 1 comprises a liquid storage cavity 13; the evaporation section 1 comprises liquid distribution pipes 14; the evaporation section 1 comprises a secondary capillary wick 15; the steam outlet of the evaporation section 1 is connected with the inlet of the condensation section 2 through a gas pipeline 5, and the outlet of the condensation section 2 is connected with the liquid inlet of the evaporation section 1 through a liquid pipeline 4 to form a circulation loop of the device.
Furthermore, the liquid distribution pipe 14 is tightly attached to the liquid channel 11, and the vapor cannot enter the liquid channel 11 through the joint, and the vapor cannot reversely enter the liquid channel 11 through the secondary capillary wick 15 due to the capillary force, so that the vapor is prevented from flowing back to the condensing section 2 through the liquid distribution pipe 14.
Further, the liquid storage cavity 13 is located above the main capillary core 8, so that liquid can be timely supplemented into the main capillary core 8, the change of heat load can be automatically adjusted, and the temperature fluctuation of the heating device is gentle.
Furthermore, the fins 3 are communicated with the inner cavity of the condensation section 2, so that the heat dissipation area is expanded.
Furthermore, a liquid baffle plate 9 is arranged at one end of the liquid channel 11 close to the outlet of the evaporation section 1, and the liquid enters the liquid channel 11 through a liquid distribution pipe 14 and flows towards the inside of the main capillary wick 8.
Furthermore, a steam baffle plate 10 is arranged at one end of the steam channel 12 close to the inlet of the evaporation section 1, and steam flows towards the outlet of the steam channel 12 under the action of capillary force.
Furthermore, the liquid baffle 9 and the steam baffle 10 are positioned at two ends of the evaporation section 1, and the working medium forms unidirectional circulation flow.
Further, the evaporation section 1 absorbs heat and then transfers the heat to the main capillary core 8 through the shell, the working medium inside the main capillary core 8 is heated and evaporated, the generated steam enters the steam channel 12 under the action of capillary force and then enters the condensation flow channel 7 inside the condensation section 2 through the gas pipeline 5 to be re-condensed into liquid working medium, the liquid working medium enters the liquid channel 11 inside the evaporation section 1 through the liquid pipeline 4, and the capillary force and gravity drive the working medium to circularly flow in the device.
Compared with the prior art, the invention has the following remarkable advantages:
(1) The liquid at the evaporation section directly enters the secondary capillary core, the liquid distribution pipe is attached to the secondary capillary core, and the steam cannot reversely flow back to the liquid distribution pipe through the capillary core, so that the steam backflow is effectively prevented;
(2) The liquid storage cavity is positioned above the main capillary core in the evaporation section, so that liquid can be timely supplemented to the main capillary core, the variable thermal load can be automatically regulated, and the temperature fluctuation of the heating device is smoothed;
(3) The evaporation section and the condensation section are connected through the hinge, so that the evaporation section can be attached to heating equipment at any angle, and heat can be absorbed more efficiently.
(4) The condensation section can be always kept in a vertical state, so that the radiator and air can perform natural convection heat transfer on the vertical surface, and the heat dissipation performance of the heat dissipation device is improved.
(5) The liquid baffle inside the evaporation section is combined with the steam baffle, so that the working medium forms directional flow inside the evaporation section, the unidirectional circulation flow inside the whole device is formed, and the antigravity performance of the radiator is effectively improved.
(6) The hollow fins are communicated with the cavity in the condensation section, so that the heat dissipation area of the condensation section is greatly expanded, and the heat dissipation efficiency is improved.
(7) Capillary force generated by the capillary core in the evaporation section can directionally drive the steam working medium to flow to the condensation section, so that the internal heat transfer performance of the device is enhanced, and heat absorbed by the evaporation section is effectively transferred to the condensation section.
The present invention is described in further detail below with reference to the attached drawing figures.
Drawings
FIG. 1 is a schematic view of a separated gravity assisted heat pipe for preventing vapor backflow according to the present invention.
FIG. 2 is a transverse cross-sectional view of an evaporation section of a vapor backflow prevention split gravity heat pipe of the present invention.
FIG. 3 is a front cross-sectional view of the vapor return resistant decoupled gravity heat pipe evaporator section of the present invention.
FIG. 4 is a left side sectional view of an evaporation section of the vapor backflow prevention split gravity heat pipe of the present invention.
FIG. 5 is a transverse cross-sectional view of the vapor reflux resistant split gravity heat pipe condenser section of the present invention.
FIG. 6 is a longitudinal cross-sectional view of the vapor return resistant split gravity heat pipe condenser section of the present invention.
Wherein, 1, an evaporation section; 2. a condensing section; 3. ribs; 4. a liquid line; 5. a gas line; 6. a hinge; 7. a condensing flow channel; 8. a primary wick; 9. a liquid baffle; 10. a steam baffle; 11. a liquid channel; 12. a steam channel; 13. a liquid storage cavity; 14. a liquid distribution tube; 15. and (5) secondary capillary cores.
Detailed Description
For the purpose of illustrating the technical solutions and technical objects of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1, 2, 3, 4, 5, 6, the embodiment of the present invention includes an evaporation section 1, a condensation section 2, fins 3, a liquid pipeline 4, a gas pipeline 5, and a hinge 6; the condensation section 2 comprises k condensation flow passages 7,k which are more than or equal to 2; the evaporation section 1 comprises a main capillary wick 8; the evaporation section 1 comprises a liquid baffle 9; the evaporation section 1 comprises a steam baffle 10; the evaporation section 1 comprises n liquid channels 11, wherein n is more than or equal to 2; the evaporation section 1 comprises m steam channels 12, and m is more than or equal to 2; the evaporation section 1 comprises a liquid storage cavity 13; the evaporation section 1 comprises liquid distribution pipes 14; the evaporation section 1 comprises a secondary capillary wick 15; the steam outlet of the evaporation section 1 is connected with the inlet of the condensation section 2 through a gas pipeline 5, and the outlet of the condensation section 2 is connected with the liquid inlet of the evaporation section 1 through a liquid pipeline 4 to form a circulation loop of the device.
With reference to fig. 2, 3, and 4, a liquid baffle 9 is disposed at one end of the liquid storage cavity 13 close to the outlet of the evaporation section 1, the liquid enters the liquid distribution pipe 14 through the inlet of the evaporation section 1, and then enters the liquid channel 11 through the liquid distribution pipe 14, and the liquid working medium can only flow into the secondary capillary core 15 under the action of capillary suction force.
With reference to fig. 2, 3 and 4, a steam baffle 10 is arranged at one end of the steam channel 12 close to the inlet of the evaporation section 1, the liquid working medium inside the primary capillary core 8 is heated and evaporated, the generated steam enters the steam channel 12 under the action of capillary force, and one side of the steam channel 12 is blocked by the steam baffle 10 and can only flow to the outlet at the other side.
With reference to fig. 2, 3 and 4, the liquid baffle 9 and the steam baffle 10 are located at two ends of the evaporation section 1, liquid can only enter the evaporation section 1 from one side, and steam can only leave the evaporation section 1 from the other side, so that the working medium forms unidirectional circulation flow, and the antigravity performance of the radiator is improved.
Referring to fig. 2, fig. 3, and fig. 4, the liquid channel 11 is located inside the secondary wick 15.
Referring to fig. 2, 3 and 4, the liquid distribution pipe 14 is closely attached to the liquid channel 11, and the vapor cannot enter the liquid channel 11 through the joint, and the vapor cannot reversely enter the liquid channel 11 through the secondary capillary wick 15 due to the capillary force, so that the vapor is prevented from flowing back to the condensing section 2 from the liquid distribution pipe 14.
With reference to fig. 2, fig. 3, and fig. 4, the liquid storage cavity 13 is located above the primary capillary wick 8, and can timely replenish liquid into the primary capillary wick 8.
The liquid channel 11, the vapor channel 12 or the condensation channel 7 are formed by mutually parallel channels which are arranged in the evaporation section 1 or the condensation section 2.
The number of the channels of the liquid channel 11, the steam channel 12 or the condensing channel 7 is at least two, the liquid pipeline 4 is divided into 3 branch pipes to be connected with the evaporation section 1, the gas pipeline 5 is divided into 3 branch pipes to be connected with the condensing section 2, and the steam working medium is guaranteed to be more uniformly distributed to each condensing channel 7, so that the heat exchange between the steam and the condensing section 2 is more sufficient.
With reference to fig. 5 and 6, the surfaces of both sides of the condensation section 2 are respectively provided with the hollow fins 3 which are parallel to each other, and the hollow fins not only improve the heat exchange efficiency of the fins, but also enhance the heat dissipation capability of the device and reduce the weight of the device.
In some embodiments, the fins 3 have a length direction that is at an angle to the condensation channel 7 or perpendicular to the direction of the condensation channel 7.
In some embodiments, the condensing section 2 is provided with fins 3 parallel to each other on only one side of the outer surface thereof, thereby reducing the weight of the entire apparatus.
Preferably, the fins 3 are perpendicular to the surface of the base plate, and the length direction of the fins 3 is parallel to the direction of the condensation flow channel 7.
Evaporation zone 1 and condensation segment 2 pass through hinge 6 and are connected, and evaporation zone 1 can follow the horizontal direction and adjust to vertical direction, can laminate the electronic equipment of different gestures, absorbs the heat that the heat source produced more high-efficiently, and condensation segment 2 can remain vertical state throughout for fin 3 carries out perpendicular surface nature convection heat transfer with the air, improves the heat-sinking capability of device.
Example 1
With reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the present invention is a separation type gravity assisted heat pipe for preventing vapor backflow when the evaporation section, the condensation section, the evaporation section, the condensation flow channel, and the evaporation section have 19 vapor channels and 10 liquid channels, and the separation type gravity assisted heat pipe comprises an evaporation section 1, a condensation section 2, fins 3, a liquid pipeline 4, a gas pipeline 5, and a hinge 6; the condensation section 2 comprises 19 condensation flow channels 7; the evaporation section 1 comprises a main capillary wick 8; the evaporation section 1 comprises a liquid baffle 9; the evaporation section 1 comprises a steam baffle 10; the evaporation section 1 comprises 10 liquid channels 11; the evaporation section 1 comprises 280 steam channels 12; the evaporation section 1 comprises a liquid storage cavity 13; the evaporation section 1 comprises a liquid distribution pipe 14; the evaporation section 1 comprises a secondary wick 15.
The steam outlet of the evaporation section 1 is connected with the inlet of the condensation section 2 through a gas pipeline 5, and the outlet of the condensation section 2 is connected with the liquid inlet of the evaporation section 1 through a liquid pipeline 4 to form a circulation loop of the device.
With reference to fig. 2, 3, and 4, a liquid baffle 9 is disposed at one end of the liquid storage cavity 13 close to the outlet of the evaporation section 1, the liquid enters the liquid distribution pipe 14 through the inlet of the evaporation section 1, and then enters the liquid channel 11 through the liquid distribution pipe 14, and the liquid working medium can only flow into the secondary capillary core 15 under the action of capillary suction force.
With reference to fig. 2, 3 and 4, a steam baffle 10 is arranged at one end of the steam channel 12 close to the inlet of the evaporation section 1, the liquid working medium inside the primary capillary core 8 is heated and evaporated, the generated steam enters the steam channel 12 under the action of capillary force, and one side of the steam channel 12 is blocked by the steam baffle 10 and can only flow to the outlet at the other side.
With reference to fig. 2, 3 and 4, the liquid baffle 9 and the steam baffle 10 are located at two ends of the evaporation section 1, liquid can only enter the evaporation section 1 from one side, and steam can only leave the evaporation section 1 from the other side, so that the working medium forms unidirectional circulation flow, and the antigravity performance of the radiator is improved.
Referring to fig. 2, fig. 3, and fig. 4, the liquid channel 11 is located inside the secondary wick 15.
Referring to fig. 2, 3 and 4, the liquid distribution pipe 14 is tightly attached to the liquid channel 11, and the vapor cannot enter the liquid channel 11 through the joint, and the vapor cannot reversely enter the liquid channel 11 through the secondary capillary 15 due to capillary force, so that the vapor is prevented from flowing back to the condensing section 2 from the liquid distribution pipe 14.
With reference to fig. 2, fig. 3, and fig. 4, the liquid storage cavity 13 is located above the primary capillary wick 8, and can timely replenish liquid into the primary capillary wick 8.
The liquid channel 11, the vapor channel 12 or the condensation channel 7 are formed by mutually parallel channels which are arranged in the evaporation section 1 or the condensation section 2.
The number of the channels of the liquid channel 11, the steam channel 12 or the condensing channel 7 is at least two, the liquid pipeline 4 is divided into 3 branch pipes to be connected with the evaporation section 1, and the gas pipeline 5 is divided into 3 branch pipes to be connected with the condensing section 2, so that the steam working medium is ensured to be more uniformly distributed to each condensing channel 7, and the heat exchange between the steam and the condensing section 2 is more sufficient.
Referring to fig. 5 and 6, the surfaces of both sides of the condensation section 2 are respectively provided with hollow fins 3 parallel to each other, so as to enhance the heat dissipation capability of the device, the fins 3 are perpendicular to the surface of the base plate, the length direction of the fins 3 is parallel to the direction of the condensation flow channel 7, and the number of the fins 3 on each side is 17.
Evaporation zone 1 and condensation segment 2 pass through hinge 6 and are connected, and evaporation zone 1 can follow the horizontal direction and adjust to vertical direction, can laminate the electronic equipment of different gestures, absorbs the heat that the heat source produced more high-efficiently, and condensation segment 2 can remain vertical state throughout for fin 3 carries out perpendicular surface nature convection heat transfer with the air, improves the heat-sinking capability of device.
Length L of evaporation zone 1 200-400mm, width W 1 200-400mm, thickness T 1 10-20mm, length L of condensing section 2 Is 400-600mm, and has a width W 2 200-400mm, thickness T 2 10-20mm, fin length L 3 350-550mm, fin height H 1 5-15mm, thickness T 3 Is 3-8mm, and the length L of the inner cavity of the fin 4 346-546mm, and a cavity height H 2 Is 4-14mm, and has a cavity thickness T 4 1-6mm, fin pitch P 1 5-15mm, the section of the condensing flow passage is rectangular, and the length L of the flow passage 5 Is 340-540mm, and has a width W 3 5-15mm, depth H 3 2-15mm, length L of evaporation channel 6 Is 140-340mm, and has a width W 4 1-3mm, depth H 4 Is 1-2mm, and the length L of the liquid channel 7 138-338mm and 1-8mm inner diameter.

Claims (8)

1. The utility model provides a disconnect-type gravity assisted heat pipe of vapor reflux prevention which characterized in that: comprises an evaporation section (1), a condensation section (2), fins (3), a liquid pipeline (4), a gas pipeline (5) and a hinge (6); the condensation section (2) comprises k condensation flow channels (7), wherein k is more than or equal to 2; the evaporation section (1) comprises a main capillary core (8); the evaporation section (1) comprises a liquid baffle (9); the evaporation section (1) comprises a steam baffle (10); the evaporation section (1) comprises n liquid channels (11), wherein n is more than or equal to 2; the evaporation section (1) comprises m steam channels (12), wherein m is more than or equal to 2; the evaporation section (1) comprises a liquid storage cavity (13); the evaporation section (1) comprises a liquid distribution pipe (14); the evaporation section (1) comprises a secondary capillary wick (15); the steam outlet of the evaporation section (1) is connected with the inlet of the condensation section (2) through a gas pipeline (5), and the outlet of the condensation section (2) is connected with the liquid inlet of the evaporation section (1) through a liquid pipeline (4) to form a circulation loop of the device.
2. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: the liquid distribution pipe (14) is tightly attached to the liquid channel (11), steam cannot enter the liquid channel (11) through a joint, and the steam cannot reversely enter the liquid channel (11) through the secondary capillary core (15) due to capillary force, so that the steam is prevented from flowing back to the condensation section (2) from the liquid distribution pipe (14).
3. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: the liquid storage cavity (13) is positioned above the main capillary core (8), liquid can be timely supplemented into the main capillary core (8), the change of thermal load is self-regulated, and the temperature fluctuation of the heating device is gentle.
4. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: the fins (3) are communicated with the inner cavity of the condensation section (2) to expand the heat dissipation area.
5. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: and a liquid baffle (9) is arranged at one end of the liquid channel (11) close to the outlet of the evaporation section (1), and liquid enters the liquid channel (11) through a liquid distribution pipe (14) and flows towards the inside of the main capillary core (8).
6. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: one end of the steam channel (12) close to the inlet of the evaporation section (1) is provided with a steam baffle (10), and steam flows towards the outlet of the steam channel (12) under the action of capillary force.
7. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: the liquid baffle (9) and the steam baffle (10) are positioned at two ends of the evaporation section (1), and the working medium forms unidirectional circulation flow.
8. The vapor backflow prevention split gravity heat pipe of claim 1, wherein: the evaporation section (1) absorbs heat and then transmits the heat to the main capillary core (8) through the shell, working media inside the main capillary core (8) are heated and evaporated, generated steam enters the steam channel (12) under the action of capillary force and then enters the condensation flow channel (7) inside the condensation section (2) through the gas pipeline (5) to be condensed again to become liquid working media, the liquid working media enter the liquid channel (11) inside the evaporation section (1) through the liquid pipeline (4), and the capillary force and the gravity drive the working media to flow in a circulating mode in the device together.
CN202210888206.7A 2022-07-27 2022-07-27 Separation type gravity heat pipe capable of preventing steam from flowing back Pending CN115218701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210888206.7A CN115218701A (en) 2022-07-27 2022-07-27 Separation type gravity heat pipe capable of preventing steam from flowing back

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210888206.7A CN115218701A (en) 2022-07-27 2022-07-27 Separation type gravity heat pipe capable of preventing steam from flowing back

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Publication Number Publication Date
CN115218701A true CN115218701A (en) 2022-10-21

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Application Number Title Priority Date Filing Date
CN202210888206.7A Pending CN115218701A (en) 2022-07-27 2022-07-27 Separation type gravity heat pipe capable of preventing steam from flowing back

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