CN110243217B - Flat plate type loop heat pipe evaporator with enclosed liquid storage chamber - Google Patents
Flat plate type loop heat pipe evaporator with enclosed liquid storage chamber Download PDFInfo
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- CN110243217B CN110243217B CN201910368535.7A CN201910368535A CN110243217B CN 110243217 B CN110243217 B CN 110243217B CN 201910368535 A CN201910368535 A CN 201910368535A CN 110243217 B CN110243217 B CN 110243217B
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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
- F28D15/0266—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
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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
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a flat-plate loop heat pipe evaporator with a surrounding liquid storage chamber, which comprises a shell and a capillary core, wherein the inside of the shell is divided into an evaporation chamber and a liquid storage chamber which are mutually independent; the capillary core is provided with four branches, the edges of the three branches extend into the liquid storage chambers in three different directions, and the edge of the fourth branch extends into the evaporation chamber to communicate the evaporation chamber with the liquid storage chambers; and the capillary core divides the evaporation chamber into two independent evaporation spaces, in each evaporation space, a steam channel is arranged on the inner side of the side wall of the evaporation chamber parallel to the axis of the capillary core, and a heating surface is formed on the outer side.
Description
Technical Field
The invention belongs to the technical field related to heat exchange enhancement, and particularly relates to a flat plate type loop heat pipe evaporator with a surrounding type liquid storage chamber.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The loop heat pipe is a high-efficiency heat transfer device which drives working media to flow by capillary force generated by a capillary core in an evaporator and transfers heat by utilizing the phase change process of the working media. Through the development of many years, the technology of the thermal control system is mature and gradually applied to the thermal control system in the fields of space aircrafts, electronic equipment and the like.
The loop heat pipe mainly comprises an evaporator, a capillary core, a liquid storage chamber, a liquid pipeline, a steam pipeline and a condensing section. The evaporator of the flat-plate loop heat pipe is a flat plate, has large heating area and small occupied space height, is favorable for being attached to a heating element, and is particularly suitable for radiating electronic devices with limited internal space, large heat productivity and high heat flux density. With the rapid development of the industries of electronics, computers and I T, the volume of electronic components is smaller and smaller, and the integration level is higher and higher, so that the heat flux density on the electronic components is higher and higher; sometimes, in order to reduce the size, the electronic components are arranged even in a stacked structure, which puts higher requirements on heat dissipation inside the electronic components. The evaporator of the conventional flat-plate loop heat pipe is generally in a flat-plate cavity structure, wherein one side of the evaporator is used as a heating surface of the evaporator, the other side of the evaporator is provided with a liquid storage chamber, and the middle of the evaporator is separated by a capillary wick, such as the structure disclosed in patent ZL 201720035225X. The liquid working medium of the liquid storage chamber enters the capillary core and is heated and evaporated by the heat from the heating surface, and the generated steam enters the steam pipeline at one side through the steam channel on the heating surface and is cooled into the liquid working medium in the condenser; the liquid working medium enters the liquid storage chamber through the liquid pipeline and the pipeline positioned at the other side of the evaporation chamber, thereby completing a cycle. The inventor finds that due to structural limitation, a capillary core in an evaporation chamber of a conventional flat-plate loop heat pipe is difficult to be very thin (such as below 3 mm), otherwise a serious reverse heat conduction effect is generated, and the working performance of the loop heat pipe is influenced; meanwhile, for the small loop heat pipe, when the heat flux density of the electronic component is high, the suction capacity of the capillary core in the loop heat pipe evaporator to the liquid working medium is tested seriously, and the heat dissipation capacity of the loop heat pipe is restricted seriously. In addition, the conventional flat-plate loop heat pipe evaporation chamber can only be heated on a single surface, so that the application of the evaporation chamber to the internal heat dissipation of electronic components with a stacked structure is limited to a certain extent, and a plurality of loop heat pipes are required for the purpose, so that the occupied space of the heat dissipation components is increased undoubtedly, and the miniaturization of equipment is not facilitated.
Disclosure of Invention
In view of the technical problems in the prior art, the present invention provides a flat plate type loop heat pipe evaporator with a surrounding liquid storage chamber, the liquid storage chamber is arranged on three sides of the evaporator, a capillary wick in the evaporator can suck liquid working medium from three sides, and the capacity of the capillary wick for sucking the liquid working medium is improved; in addition, the evaporator can simultaneously dissipate heat for two vertically adjacent heating electronic components, effectively improves the heat transfer capacity of the loop heat pipe, occupies small space and is beneficial to the miniaturization of equipment. The structure prolongs the distance of steam entering the liquid storage chamber from the evaporation chamber, and simultaneously increases the heat transfer resistance of heat transferred from the evaporation chamber to the liquid storage chamber due to the existence of the heat insulation coating and the heat insulation insertion strip, reduces the reverse heat conduction effect of heat transferred from the evaporation chamber to the liquid storage chamber in the evaporator, and is favorable for the stable operation of the loop heat pipe.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a flat-type loop heat pipe evaporator with a surrounding type liquid storage chamber comprises a shell and a capillary core, wherein the inside of the shell is divided into an evaporation chamber and a liquid storage chamber which are mutually independent, a steam outlet is arranged on the side wall of the evaporation chamber, and a liquid inlet and an air suction opening are arranged on the side wall of the liquid storage chamber;
the capillary core is provided with four branches, the edges of the three branches extend into the liquid storage chambers in three different directions, and the edge of the fourth branch extends into the evaporation chamber to communicate the evaporation chamber with the liquid storage chambers; and the capillary core divides the evaporation chamber into two independent evaporation spaces, in each evaporation space, a steam channel is arranged on the inner side of the side wall of the evaporation chamber parallel to the axis of the capillary core, and a heating surface is formed on the outer side.
As a further technical scheme, the structure that the liquid storage chambers are arranged on three sides of the evaporation chamber is adopted, so that the liquid absorption area and the liquid absorption capacity of the capillary core can be increased, the water in the capillary core in the evaporation chamber is fully supplemented, and the heat absorption capacity of the evaporation chamber is improved.
As a further technical scheme, the steam outlet is positioned on the surface, perpendicular to the heating surface, in the evaporation chamber, and the steam outlet is connected with the steam pipeline.
As a further technical scheme, a separation beam is arranged between the evaporation chamber and the liquid storage chamber, the capillary core is arranged along the horizontal direction and extends into the liquid storage chamber through the separation beam, and the evaporation chamber is communicated with the liquid storage chamber through the capillary core; the existence of the separation beam between the evaporation chamber and the liquid storage chamber prolongs the distance of steam entering the liquid storage chamber from the evaporation chamber, increases the heat transfer resistance in the process of transferring heat from the evaporation chamber to the working medium in the liquid storage chamber, and reduces the reverse heat conduction effect of the evaporator.
As a further technical scheme, the separation beam can be made of the same material as the liquid storage chamber and the evaporation chamber and integrated with the evaporator in a machining mode, or different heat insulation materials can be adopted and embedded between the evaporation chamber and the liquid storage chamber in a welding or other sealing connection mode.
As a further technical scheme, a liquid inlet of the liquid storage chamber is connected with a liquid pipeline, and steam is condensed by a condenser, enters the liquid storage chamber through the liquid inlet of the liquid storage chamber through a liquid pipeline and enters the evaporation chamber again through a capillary core.
As a further technical scheme, the width of the separation beam between the evaporation chamber and the liquid storage chamber is more than 5 mm.
As a further technical scheme, the evaporation chamber, the separation beam and the liquid storage chamber can be integrated by adopting a machining mode.
As a further technical scheme, the shell comprises a lower shell and an upper shell, the upper shell is mounted at the upper part of the lower shell, and the middle of the upper shell is sealed by a partition beam and a sealing strip and then divided into an evaporation chamber and a liquid storage chamber.
As a further technical scheme, a steam channel is arranged at the top of the lower shell corresponding to the evaporation chamber, and a steam channel is arranged at the bottom of the upper left shell.
As a further technical scheme, the heat insulation insertion strip is installed on the separation beam to reduce the heat transmitted from the heating surface of the evaporation chamber to the liquid storage chamber, and further reduce the reverse heat conduction effect of the evaporator.
As a further technical scheme, when the separation beam is embedded between the evaporation chamber and the liquid storage chamber by welding or other sealing connection modes, the separation beam can adopt a heat insulating material with low heat conductivity coefficient so as to further reduce the reverse heat conduction effect of the evaporator.
As a further technical scheme, the inner wall surface of the liquid storage chamber is coated with a heat insulation coating.
The beneficial technical effects of the invention are as follows:
the evaporation chamber is provided with an enclosed liquid storage chamber, the liquid storage chamber is positioned on three sides of the evaporation chamber, the evaporation chamber is communicated with the liquid storage chamber through a capillary core, the capillary core in the evaporator can suck liquid working media from three sides, the capacity of the capillary core for sucking the liquid working media is improved under the condition that the thickness of the capillary core is not increased, and therefore a more powerful condition is provided for miniaturization of the capillary core. Compared with the traditional flat-plate loop heat pipe, the flat-plate loop heat pipe has the advantages that one more heating surface is provided, more heat can be absorbed, meanwhile, convenience is provided for the internal heat dissipation of the electronic components with the superposed structure, the heat can be dissipated for the two heating components which are adjacent from top to bottom simultaneously, the occupied space is small, and the miniaturization of equipment is facilitated. The distance between the evaporation chamber and the liquid storage chamber is determined by the width of the separating strip and is independent of the thickness of the capillary wick; by increasing the width of the separation beam, the distance of steam entering the liquid storage chamber from the evaporation chamber can be prolonged, the heat transfer resistance of heat transferred from the evaporation chamber to the working medium in the liquid storage chamber in the process is increased, the reverse heat conduction effect in the evaporator is reduced, and the stable operation of the loop heat pipe is facilitated.
The heat insulation insertion strip is arranged on the separation beam, so that the heat transmitted from the heating surface of the evaporation chamber to the liquid storage chamber is reduced, and the reverse heat conduction effect of the evaporator is further reduced.
The inner wall surface of the liquid storage chamber is coated with a heat insulation coating. The heat insulation coating increases the heat transfer thermal resistance in the process of transferring heat from the wall surface of the liquid storage chamber to the working medium in the liquid storage chamber, reduces the heat leakage from the wall surface of the liquid storage chamber to the working medium in the liquid storage chamber, and reduces the reverse heat conduction effect of the evaporator.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a plan view of an evaporator of the present invention;
FIG. 2 is an elevational, cross-sectional view of the evaporator of the present invention;
fig. 3 is a side sectional view of an evaporator of the present invention.
In the figure, 1, a steam outlet, 2, a steam channel, 3, an evaporation chamber, 4, a sealing strip, 5, a separation beam, 6, a liquid storage chamber, 7, a liquid inlet, 8, an air pumping port, 9, a capillary core, 10, an upper evaporator shell, 11, a heat insulation coating, 12, a lower evaporator shell, 13 and a heat insulation fillet.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As described in the background art, the evaporator of the conventional flat-plate loop heat pipe is generally a flat-plate cavity structure, in which one side is used as the heating surface of the evaporator, and the other side is provided with a liquid storage chamber, and the middle is separated by a capillary wick, such as the structure disclosed in patent ZL 201720035225X; the liquid working medium of the liquid storage chamber enters the capillary core and is heated and evaporated by the heat from the heating surface, and the generated steam enters the steam pipeline at one side through the steam channel on the heating surface and is cooled into the liquid working medium in the condenser; the liquid working medium enters the liquid storage chamber through the liquid pipeline and the pipeline positioned at the other side of the evaporation chamber, thereby completing a cycle. The inventor finds that the heat leakage of the evaporation chamber of the conventional flat-plate loop heat pipe, namely the reverse heat conduction effect of the evaporation chamber to the liquid storage chamber, is determined by the thickness of the capillary wick, the heat conductivity coefficient of the capillary wick material and the heat conductivity coefficient of the wall surface of the evaporator. In order to realize the miniaturization of the flat loop heat pipe, the thickness of the capillary core is as thin as possible, and the reverse heat conduction effect from the evaporation chamber to the liquid storage chamber is increased, so that the operation of the loop heat pipe is not facilitated; meanwhile, the conventional flat-plate loop heat pipe can only be heated on a single surface, so that the flat-plate loop heat pipe evaporator is limited to a certain extent when being applied to the internal heat dissipation of an electronic component with a superposed structure, a plurality of loop heat pipes are needed to be adopted, the occupied space of the heat dissipation component is increased undoubtedly, the miniaturization of equipment is not facilitated, and in order to solve the technical problems, the flat-plate loop heat pipe evaporator with the surrounding liquid storage chamber is provided.
In a typical embodiment of the present application, as shown in fig. 1, a flat plate type loop heat pipe with a surrounding liquid storage chamber is structurally shown in fig. 1, fig. 2 and fig. 3, the flat plate type loop heat pipe evaporator comprises a shell and a capillary core, the interior of the shell is divided into an evaporation chamber and a liquid storage chamber which are independent of each other, a vapor outlet is arranged on the side wall of the evaporation chamber, the vapor outlet is positioned on the surface of the evaporation chamber which is perpendicular to a heating surface, corresponding to the left side surface in the drawing, and the vapor outlet is connected with a vapor pipeline; a liquid inlet and an air extraction opening are arranged on the side wall of the liquid storage chamber; the liquid inlet and the air extraction opening are positioned on the same surface of the shell and correspond to the right side surface in the attached drawing 1; the capillary core is arranged in the shell and is provided with four branches, wherein the edges of three branches extend into the liquid storage chamber, and the edge of the fourth branch extends into the evaporation chamber to communicate the evaporation chamber with the liquid storage chamber; and the capillary core divides the evaporation chamber into two independent evaporation spaces, in each evaporation space, a steam channel is arranged on the inner side of the side wall of the evaporation chamber parallel to the axis of the capillary core, and a heating surface is formed on the outer side.
As a further technical scheme, a separation beam is arranged between the evaporation chamber and the liquid storage chamber, the capillary core is arranged along the horizontal direction and extends into the liquid storage chamber through the separation beam, and the evaporation chamber is communicated with the liquid storage chamber through the capillary core; the existence of the separation beam between the evaporation chamber and the liquid storage chamber prolongs the distance of steam entering the liquid storage chamber from the evaporation chamber, increases the heat transfer resistance in the process of transferring heat from the evaporation chamber to the working medium in the liquid storage chamber, and reduces the reverse heat conduction effect of the evaporator.
As a further technical scheme, the heat insulation insertion strip is installed on the separation beam to reduce the heat transmitted from the heating surface of the evaporation chamber to the liquid storage chamber, and further reduce the reverse heat conduction effect of the evaporator.
As a further technical scheme, the separation beam can be made of the same material as the liquid storage chamber and the evaporation chamber and integrated with the evaporator in a machining mode, or different heat-insulating materials can be adopted and embedded between the evaporation chamber and the liquid storage chamber in a welding or other sealing connection mode; when the separation beam is embedded between the evaporation chamber and the liquid storage chamber by welding or other sealing connection methods, the separation beam can adopt a heat insulating material with low heat conductivity coefficient so as to further reduce the reverse heat conduction effect of the evaporator. Preferably, the width of the separation beam between the evaporation chamber and the liquid storage chamber is 5mm or more.
As a further technical scheme, a liquid inlet of the liquid storage chamber is connected with a liquid pipeline, and steam is condensed by a condenser, enters the liquid storage chamber through the liquid inlet of the liquid storage chamber through a liquid pipeline and enters the evaporation chamber again through a capillary core.
As a further technical scheme, the evaporation chamber, the separation beam and the liquid storage chamber can be integrated by adopting a machining mode.
As a further technical solution, the housing comprises a lower housing 12 and an upper housing 10; the upper shell is arranged at the upper part of the lower shell, and the middle of the upper shell is separated and sealed by a separation beam and a sealing strip to form a liquid storage chamber and an evaporation chamber; as shown in fig. 1, the evaporation chamber resembles a rectangular structure; the liquid storage chamber is similar to a concave structure inclined leftwards and is enclosed on the front side, the rear side and the right side of the liquid storage chamber; the top and bottom surfaces of the evaporation chamber serve as heating surfaces.
As further technical scheme, be equipped with the steam channel at the lower casing top that the evaporating chamber corresponds, be equipped with the steam channel in the bottom of last left casing, the surface of the casing that corresponds is the heating surface, the evaporating chamber has two heating surfaces, be located the upper and lower two sides of evaporating chamber respectively, a heating surface has been more than traditional flat loop heat pipe, thereby can absorb more heats, and simultaneously, it is convenient to provide for the inside heat dissipation of the electronic components of stacked structure, can dispel the heat for upper and lower adjacent two heating components simultaneously, it is little to occupy the space, be favorable to the miniaturization of equipment. The liquid storage chambers are positioned on three sides of the evaporation chamber, and the evaporation chamber is communicated with the liquid storage chambers through capillary cores. The structure of the surrounding liquid storage chamber enables the capillary core in the evaporator to suck the liquid working medium from three sides, and the capacity of the capillary core for sucking the liquid working medium is improved under the condition of not increasing the thickness of the capillary core, so that a more powerful condition is provided for the miniaturization of the capillary core; the distance between the evaporation chamber and the liquid storage chamber is determined by the width of the separating strip and is independent of the thickness of the capillary wick; by increasing the width of the separation beam, the distance of steam entering the liquid storage chamber from the evaporation chamber can be prolonged, the heat transfer resistance of heat transferred from the evaporation chamber to the working medium in the liquid storage chamber in the process is increased, the reverse heat conduction effect in the evaporator is reduced, and the stable operation of the loop heat pipe is facilitated.
The inner wall surface of the liquid storage chamber is coated with the heat insulation coating, the heat transfer thermal resistance of heat in the process of transferring heat from the wall surface of the liquid storage chamber to working media in the liquid storage chamber is increased through the heat insulation coating, the heat leakage of the working media in the liquid storage chamber through the wall surface of the liquid storage chamber is reduced, and the reverse heat conduction effect of the evaporator is reduced.
Specifically, in the present invention, an evaporator upper shell 10 and an evaporator lower shell 12 are buckled together to form an evaporator shell, and a steam channel 2 is carved on the evaporator upper shell and the evaporator lower shell, specifically referring to fig. 3, wherein the steam channel in fig. 3 is similar to a rectangular channel; a capillary core 9 is arranged between an upper evaporator shell 10 and a lower evaporator shell 12, the capillary core extends into a liquid storage chamber 6 from an evaporation chamber 3 through a separation beam 5, and a heat insulation coating 11 is sprayed on the inner wall of the liquid storage chamber to increase heat transfer resistance in the process of transferring heat from the wall surface of the liquid storage chamber to working media in the liquid storage chamber and reduce heat leakage of the working media in the liquid storage chamber through the wall surface. The side wall of the evaporation chamber is provided with an extraction opening 8 for vacuumizing and filling liquid working medium during the assembly of the loop heat pipe. In the working process of the loop heat pipe, heat is transferred into the evaporation chamber 3 through two heating surfaces of an upper shell and a lower shell of the evaporator, a liquid working medium in the capillary core 9 is heated and vaporized, formed steam is converged by the steam channel 2 and flows out of the evaporation chamber 3 from the steam outlet 1, enters the condenser (not shown) through a steam pipeline (not shown) and is condensed into liquid again, and then returns to the liquid storage chamber 6 from the liquid inlet 7 through the liquid pipeline. And part of the capillary core positioned in the liquid storage chamber absorbs the liquid working medium in the liquid storage chamber and pumps the liquid working medium to the evaporation chamber through the capillary core to complete a cycle. In order to avoid that the steam formed in the evaporation chamber enters the liquid storage chamber to influence the pressure difference at two sides and bring negative influence to the working performance of the loop heat pipe, sealing strips 4 are processed at two ends of the separation beam. In order to reduce the heat transmitted from the heating surface of the evaporation chamber to the liquid storage chamber and further reduce the reverse heat conduction effect of the evaporator, a heat insulation insertion strip is arranged on the separation beam.
The loop heat pipe can be started smoothly in an environment of 40-90 ℃ and stably works for a long time.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive faculty, based on the technical solutions of the present invention.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A flat-plate loop heat pipe evaporator with a surrounding liquid storage chamber comprises a shell and a capillary core, wherein the inside of the shell is divided into an evaporation chamber and a liquid storage chamber which are mutually independent, a steam outlet is arranged on the side wall of the evaporation chamber, and a liquid inlet and an air suction opening are arranged on the side wall of the liquid storage chamber; the capillary core is arranged in the shell and provided with four branches, wherein the edges of the three branches extend into the liquid storage chambers surrounding the three sides of the evaporation chamber, and the edge of the fourth branch extends into the evaporation chamber to communicate the evaporation chamber with the liquid storage chambers; and the capillary core divides the evaporation chamber into two independent evaporation spaces, in each evaporation space, a steam channel is arranged on the inner side of the side wall of the evaporation chamber parallel to the axis of the capillary core, and a heating surface is formed on the outer side.
2. The flat circuit heat pipe evaporator with an enclosed liquid reservoir of claim 1 wherein the vapor outlet is located in the evaporation chamber at a plane perpendicular to the heating surface, the vapor outlet being connected to a vapor line.
3. The flat tube loop heat pipe evaporator with an enclosed liquid reservoir of claim 1, wherein a separation beam is provided between the evaporation chamber and the liquid reservoir, and the capillary wick is horizontally disposed to extend into the liquid reservoir through the separation beam to connect the evaporation chamber and the liquid reservoir.
4. The flat plate loop heat pipe evaporator with an enclosed liquid reservoir of claim 3, wherein the partition beam has a thermal slug mounted thereon.
5. The flat plate loop heat pipe evaporator with an enclosed reservoir of claim 3 wherein the dividing beam and the housing are both of the same material and are machined to be integral with the evaporator; or the separation beam is embedded between the evaporation chamber and the liquid storage chamber in a welding and sealing connection mode by adopting a heat insulating material different from that of the shell.
6. The planar loop heat pipe evaporator with an enclosed reservoir of claim 4 wherein the partitioning beam is a low thermal conductivity insulating material when the partitioning beam is embedded between the evaporation chamber and the reservoir by a welded sealed connection.
7. The flat plate loop heat pipe evaporator with an enclosed reservoir of claim 5, wherein the width of the separation beam between the evaporation chamber and the reservoir is 5mm or more.
8. The flat plate loop heat pipe evaporator with an enclosed reservoir of claim 1, wherein the liquid inlet of the reservoir is connected to a liquid conduit, and vapor condensed by a condenser enters the reservoir through the liquid conduit via the reservoir liquid inlet and re-enters the evaporation chamber via the capillary wick.
9. The flat plate loop heat pipe evaporator with an enclosed liquid reservoir of claim 1, wherein the housing comprises a lower housing and an upper housing, the upper housing is mounted on the upper portion of the lower housing, and the middle is divided into the evaporation chamber and the liquid reservoir by a partition beam and a sealing strip.
10. The flat plate loop heat pipe evaporator with an enclosed reservoir of claim 1, wherein the interior wall of said reservoir is coated with a thermally insulating coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910368535.7A CN110243217B (en) | 2019-05-05 | 2019-05-05 | Flat plate type loop heat pipe evaporator with enclosed liquid storage chamber |
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| CN201910368535.7A CN110243217B (en) | 2019-05-05 | 2019-05-05 | Flat plate type loop heat pipe evaporator with enclosed liquid storage chamber |
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| CN110243217B true CN110243217B (en) | 2020-06-26 |
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| CN111031750B (en) * | 2019-12-02 | 2020-09-08 | 华中科技大学 | Rectangular partition evaporator for large-area heat dissipation |
| CN111649609A (en) * | 2020-06-23 | 2020-09-11 | 山东大学 | Flat plate type loop heat pipe evaporator with comb-shaped structure carbon fiber capillary core |
| CN112179190A (en) * | 2020-09-29 | 2021-01-05 | 西安交通大学 | Ultrathin flat-plate loop heat pipe of coupling ejector |
| CN113815906B (en) * | 2020-11-05 | 2023-12-15 | 山东大学 | Loop heat pipe and thermal control system thereof |
| CN113566628B (en) * | 2021-06-29 | 2023-03-14 | 苏州浪潮智能科技有限公司 | Loop heat pipe adopting surrounding type liquid storage cavity |
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| JP5370074B2 (en) * | 2009-10-27 | 2013-12-18 | 富士通株式会社 | Loop type heat pipe and electronic device equipped with the same |
| CN102374807A (en) * | 2010-08-20 | 2012-03-14 | 富准精密工业(深圳)有限公司 | Loop heat pipe |
| CN103344143B (en) * | 2013-06-08 | 2015-05-20 | 北京航空航天大学 | Evaporator and liquid reservoir used for loop heat pipe and application thereof |
| CN104613440B (en) * | 2015-03-03 | 2017-12-05 | 中国科学院工程热物理研究所 | A kind of heat abstractor of remote LED light fixture |
| CN108278916B (en) * | 2018-01-12 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Plate type loop heat pipe evaporator |
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2019
- 2019-05-05 CN CN201910368535.7A patent/CN110243217B/en active Active
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