CN113008061B - Soaking plate condensation end of ultrathin bionic vein gradient liquid absorption core structure - Google Patents
Soaking plate condensation end of ultrathin bionic vein gradient liquid absorption core structure Download PDFInfo
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- CN113008061B CN113008061B CN202110313901.6A CN202110313901A CN113008061B CN 113008061 B CN113008061 B CN 113008061B CN 202110313901 A CN202110313901 A CN 202110313901A CN 113008061 B CN113008061 B CN 113008061B
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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
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Abstract
The application discloses ultra-thin bionic vein gradient wick structure's soaking plate condensation end includes: the condensation end main body and the central liquid suction core are arranged on the condensation end main body; a condensation center and a bionic vein channel are arranged on the first end face of the condensation end main body; the central liquid suction core is arranged in the condensation center; the bionic vein channel diverges towards the periphery along the condensation center and is communicated with the central liquid suction core. The bionic vein channel and the central liquid suction core are arranged on the condensation end main body, and the central liquid suction core is used as a liquid suction center and is used for conveying the vapor chamber condensation working medium to the evaporation end; the gas working medium is condensed into liquid on the surface of the condensation end main body, and the liquid working medium flows through the bionic vein channel and is converged to flow to the central liquid suction core, so that the working medium reflux rate is increased, the condensation reflux performance of the flat heat pipe is improved, the circulation of the heat transfer working medium is facilitated, the heat transfer efficiency is improved, the temperature is more quickly balanced, and the temperature uniformity is better. The problem that the reflux of the existing soaking plate is not perfect enough and is not beneficial to the circulation of a heat transfer medium is effectively solved.
Description
Technical Field
The application relates to the technical field of vapor chamber, in particular to a vapor chamber condensation end of an ultrathin bionic vein gradient liquid absorption core structure.
Background
In the field of heat exchange, the heat exchange tube technology can transfer high-density heat flow in time by utilizing latent heat in the phase change process of a working medium, thereby becoming an effective method for solving the heat dissipation problem. The flat heat pipe is a novel heat dissipation medium designed according to the working principle of the heat pipe, the working principle is similar to that of the heat pipe, but compared with the one-dimensional linear heat transfer mode of the heat pipe, the heat transfer mode of the flat heat pipe is two-dimensional surface heat transfer, so that the flat heat pipe has better heat transfer performance and temperature uniformity. The flat heat pipe has the main structure of casing, liquid sucking core, working medium, etc. and has the working principle that when heat is made to pass through the evaporating area of the flat heat pipe from the heat source, the liquid in the cavity in low vacuum degree is boiled and gasified, and under the action of pressure difference, the gas flows to the condensing area and releases heat when meeting the condensing junction and flows back to the evaporating area along the liquid sucking core under the action of capillary force, and the heat in the condensing surface is taken away by other heat dissipating modes outside the flat heat pipe. Although the working principle is similar, compared with the heat transfer mode of the heat pipe in one-dimensional linearity, the heat transfer mode of the flat heat pipe is the heat transfer mode on a two-dimensional surface, so that the flat heat pipe has better heat transfer performance and temperature uniformity.
With the development of science and technology, the types of heat pipes are more and more abundant. At present, the heat pipe can be divided into a common heat pipe, a separate heat pipe, a loop heat pipe of a capillary pump, a micro heat pipe, a flat heat pipe, a radial heat pipe and the like according to the structural form; among them, flat heat pipes are widely used because of their large heat diffusion area. The conventional flat heat pipe is not complete in backflow function and is not beneficial to circulation of heat transfer media.
Disclosure of Invention
In view of the above, the present application provides a vapor chamber condensation end of an ultrathin bionic vein gradient liquid absorption core structure, which is used for solving the problem that the existing vapor chamber is not complete in backflow and is not beneficial to the circulation of a heat transfer medium.
In order to achieve the technical purpose, the application provides a vapor chamber condensation end of an ultrathin bionic vein gradient liquid absorption core structure, which is characterized by comprising: the condensation end main body and the central liquid suction core;
a condensation center and a bionic vein channel are arranged on the first end surface of the condensation end main body;
the central liquid suction core is arranged in the condensation center;
the bionic vein channel is diffused towards the periphery along the condensation center and communicated with the central liquid suction core.
Preferably, a circumferential wick is also included;
circumference wick set up in the condensation end main part, the intercommunication bionical vein channel, and wind center wick is the circumference equipartition.
Preferably, the bionic vein channel specifically comprises a primary vein channel, a secondary vein channel and a spacing channel;
the primary vein channels are communicated with the central liquid suction core and are uniformly distributed around the condensation center divergent circumference;
the spacing channels are arranged between the adjacent primary vein channels and are communicated with the central liquid suction core;
the secondary vein channel is communicated with the spacing channel and the primary vein channel.
Preferably, the groove width of the primary vein channel is tapered from the end toward the condensation center.
Preferably, the width of the secondary vein channel tapers from the spacing channel to the primary vein channel.
Preferably, the circumferential wick is disposed at a bisecting position between the outer periphery of the condensation end main body and the central wick.
Preferably, the central wick and the circumferential wick are both porous structures formed by sintering metal meshes or porous structures formed by sintering foamed metal.
Preferably, the condensation end main body protrudes toward the first end surface, and the thickness of the condensation end main body gradually decreases toward the outer periphery along the condensation center.
Preferably, the biomimetic vein channel has a decreasing hydrophobicity towards the condensation center along the end of the channel.
Preferably, the increasing hydrophobicity of the channel surface is obtained by chemical etching combined with dip coating treatment.
According to the technical scheme, the application provides a soaking plate condensation end of ultra-thin bionic vein gradient liquid absorption core structure, includes: the condensation end main body and the central liquid suction core; a condensation center and a bionic vein channel are arranged on the first end surface of the condensation end main body; the central liquid suction core is arranged in the condensation center; the bionic vein channel is diffused towards the periphery along the condensation center and communicated with the central liquid suction core. The bionic vein channel and the central liquid suction core are arranged on the condensation end main body, and the central liquid suction core is used as a liquid suction center and is used for conveying the vapor chamber condensation working medium to the evaporation end; the gas working medium is condensed into liquid on the surface of the condensation end main body, and the liquid working medium flows through the bionic vein channel and is converged to flow to the central liquid suction core, so that the working medium reflux rate is increased, the condensation reflux performance of the flat heat pipe is improved, the circulation of the heat transfer working medium is facilitated, the heat transfer efficiency is improved, the temperature is more quickly balanced, and the temperature uniformity is better. The problem that the reflux of the existing soaking plate is not perfect enough and is not beneficial to the circulation of a heat transfer medium is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a front view of a vapor chamber condensation end of an ultrathin bionic vein gradient wick structure provided in an embodiment of the present application;
fig. 2 is a perspective view of a vapor chamber condensation end of an ultrathin bionic vein gradient wick structure according to an embodiment of the present disclosure;
in the figure: 1. a condensation end main body; 2. a central wick; 3. bionic vein channels; 4. a circumferential wick; 31. a primary vein channel; 32. a secondary vein channel; 33. spaced apart channels.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection claimed herein.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a vapor chamber condensation end of an ultrathin bionic vein gradient liquid absorption core structure.
Referring to fig. 1, in an embodiment of the present application, a vapor chamber condensation end of an ultra-thin bionic vein gradient wick structure includes: a condensation end main body 1 and a central liquid suction core 2; a condensation center and a bionic vein channel 3 are arranged on the first end surface of the condensation end main body 1; the central liquid absorption core 2 is arranged in the condensation center; the bionic vein channel 3 is dispersed to the periphery along the condensation center and communicated with the central liquid absorbing core 2.
Specifically, a gas working medium is condensed into a liquid state on the surface of a condensation end main body 1 and then distributed on a bionic vein channel 3, and the bionic vein channel 3 is communicated with a central liquid suction core 2 at the condensation center; the central liquid suction core 2 can adopt a structure utilizing capillary action, liquid suction is realized by means of capillary action, so that liquid working media are gathered on the central liquid suction core 2 through the bionic vein channels 3, the flowing of the channel liquid working media is promoted, then the liquid working media are transmitted to the evaporation end, the working media in the vapor chamber are promoted to form a circulation loop, and the phase change and the heat transfer of the phase change working media are realized.
The above is the first embodiment provided in the present application, and the following is the second embodiment provided in the present application, specifically referring to fig. 1 and fig. 2.
An ultra-thin soaking plate condensation end of bionic vein gradient liquid absorption core structure comprises: a condensation end main body 1 and a central liquid suction core 2; a condensation center and a bionic vein channel 3 are arranged on the first end surface of the condensation end main body 1; the central liquid absorption core 2 is arranged in the condensation center; the bionic vein channel 3 is dispersed to the periphery along the condensation center and communicated with the central liquid absorbing core 2.
Further, a circumferential wick 4 is also included; the circumferential liquid absorption cores 4 are uniformly distributed on the condensation end main body 1 around the circumference of the central liquid absorption core 2, are communicated with the bionic vein channels, and are communicated with the central liquid absorption core 2 through the bionic vein channels 3.
Specifically, the circumferential liquid absorbing core 4 is used as an auxiliary liquid absorbing center and communicated with the bionic vein channel 3, can absorb surrounding liquid working media and directly transmit the liquid working media to the evaporation end, and meanwhile plays a role in supporting the condensation end main body 1.
Further, the bionic vein channel 3 specifically comprises a primary vein channel 31, a secondary vein channel 32 and a spacing channel 33; the primary vein channels 31 are communicated with the central liquid absorbing core 2 and are uniformly distributed around the divergent circumference of the condensation center; the spacing channel 33 is arranged between the adjacent primary vein channels 31 and is communicated with the central liquid absorbing core 2; the secondary vein channel 32 communicates the partition channel 33 with the primary vein channel 31.
Specifically, in the present embodiment, the spacing channels 33 and the primary vein channels 31 are both in communication with the central wick 2 and are distributed at circumferential divergent intervals around the central wick 2; the secondary vein channel 32 is used as a branch of the primary vein channel 31 and is respectively communicated with the spacing channel 33 and the primary vein channel 31; the liquid working medium collected by the spacing channels 33 is gathered to the central liquid absorbing core 2 through the primary vein channels 31, so that the surface temperature of the condensation end main body 1 is more uniform.
Further, the groove width of the primary vein channel 31 is gradually reduced from the tail end to the condensation center; the groove width of the secondary vein groove 32 is gradually reduced from the spacing groove 33 to the primary vein groove 31; the bionic vein channel 3 has gradually decreased hydrophobicity from the tail end of the channel to the condensation center.
Specifically, the gas working medium is condensed into a liquid state on the surface of the condensation end main body 1, the liquid working medium flows through the channels, and the channels with gradually reduced channel widths utilize the capillary force of the constantly increased vein tips, so that the liquid working medium at the wide channels spontaneously flows to the narrow channels, namely the working medium flows to the primary vein channels 31 through the secondary vein channels 32 through the spacing channels and then is converged to the central liquid absorption core 2.
Meanwhile, the surface of the channel is coated with a hydrophobic coating, and the hydrophobicity decreases from the tail end to the condensation center; specifically, the hydrophobicity of the secondary vein channel 32 decreases from the end connected with the spacing channel 33 to the end connected with the primary vein channel 31; the hydrophobicity of the primary vein channel 31 decreases from the end toward the condensation center.
In this embodiment, the incremental hydrophobicity of the channel surface is obtained by combining chemical etching with dip-coating treatment, specifically, hydrogen peroxide solution is used for etching, then silver nitrate aqueous solution is used for treatment, and finally mixed solution containing ethanol, hydrochloric acid and perfluorododecyl triethoxysilane (PFDTES) is used for treatment.
Further, the circumferential wick 4 is provided at a bisected position between the outer periphery of the condensation end main body 1 and the central wick 2. Specifically, in the present embodiment, the condensation end body 1 is circular, and the circumferential wicks 4 are uniformly distributed at equal angles around the circumference of the condensation center and are disposed at a radius of one-half of the center.
Further, the central wick 2 and the circumferential wick 4 are both porous structures formed by sintering metal wire meshes or porous structures formed by sintering foam metal.
It should be noted that, the wick is a porous structure, and the gap is much smaller than the channel, so the capillary force is larger than the channel, and the wick absorbs the surrounding liquid to be stored, and directly transmits the liquid to the evaporation end, and quickly supplements the evaporated liquid working medium.
Specifically, the central liquid suction core 2 and the circumferential liquid suction core 4 realize liquid suction by utilizing the capillary action structure and the capillary action force, so that the flow of the channel liquid working medium is promoted, the liquid working medium flows to the evaporation end, the working medium in the vapor chamber is promoted to form a circulation loop, and the phase change and the heat transfer of the phase change working medium are realized. The liquid absorption core structure is a porous structure formed by sintering a copper wire mesh, namely the liquid absorption core is made of the copper wire mesh.
In the embodiment, a groove for sintering the central liquid suction core and the axial liquid suction core is reserved on the condensation end main body 1; the diameter of the circumferential wick 4 supporting column structure is 4mm, the thickness of the wick structure is 1mm, and the wick structure is sintered on a groove reserved on the surface of the condensation end main body 1. The thickness of the edge of the main body of the condensation end is 0.3-0.4 mm. The sintering temperature of the copper wick structure was 900 ℃.
Furthermore, the width of the far end of the primary vein channel 31 is 0.8-1.0mm, and the width of the near end is 0.1-0.3 mm; the width of the secondary vein channel 32 is 0.8mm at most, 0.2-0.3mm at least, and the depth of the channel is 0.2-0.6 mm.
Further, the first end surface of the condensation end main body 1 is convexly arranged, and the thickness is gradually reduced towards the periphery along the condensation center.
Specifically, in practical use, the condensation end main body 1 may be installed in a manner that the first end face faces downward; the first end face is convex, so that in the flowing process of the liquid working medium in the bionic vein channel 3, the liquid working medium can flow to the condensation center with large thickness from the position with thin thickness under the action of gravity, the liquid working medium flows to the primary vein channel 31 from the secondary vein channel 32, and is converged to the central liquid absorption core 2 from the primary vein channel 31.
The embodiment of the application provides a vapor chamber condensation end of an ultrathin bionic vein gradient liquid absorption core structure, which adopts the bionic vein gradient liquid absorption core structure and comprises a vapor chamber body 1 with a bionic vein channel 3 and a liquid absorption core, wherein the bionic vein channel 3 is converged to the central liquid absorption core for backflow of a condensation working medium; the liquid absorption cores are distributed in the condensation center and the periphery, the central liquid absorption core 2 serves as a liquid absorption center and is used for conveying the vapor chamber condensation working medium to the evaporation end, and the circumferential liquid absorption core 4 serves as an auxiliary liquid absorption center and a supporting point of the vapor chamber body 1. The gaseous working medium is liquid at condensation end main part surface condensation, by the thin big part of flow direction thickness of thickness under the action of gravity, simultaneously because the effect of channel hydrophobicity gradient and groove width convergent, the capillary force that the gradual shrinkage hydrophobicity channel utilized the vein pointed end to constantly increase for the liquid working medium of wide channel department flows to narrow channel voluntarily, and the distal center end that the working medium passes through the spacing channel promptly flows to nearly center end, flows to one-level vein channel 31 through second grade vein channel 32, and then assembles to central imbibition core 2. The circumferential liquid absorption cores 4 and the central liquid absorption cores are both of porous structures; the circumferential liquid absorbing core 4 is used as a liquid absorbing center and can absorb working media absorbed by the surrounding channels, and the gap is far smaller than the channels, so that the capillary force is larger than the channels, the surrounding liquid can be absorbed and stored, and the liquid is directly transmitted to the evaporation end, the evaporated liquid working media can be rapidly supplemented, and meanwhile, the effect of supporting the condensation end and the evaporation end is also achieved. The liquid working medium gathered by the liquid absorption core is conveyed to the evaporation end of the soaking plate. Therefore, the reflux rate of the working medium is accelerated, the condensation reflux performance of the flat heat pipe is improved, the circulation of the heat transfer working medium is facilitated, the heat transfer efficiency is improved, the temperature is balanced more quickly, and the temperature uniformity is better.
Although the present invention has been described in detail with reference to examples, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (6)
1. The utility model provides an ultra-thin bionical vein gradient imbibition core structure's vapor chamber condensation end which characterized in that includes: the condensation end comprises a condensation end main body, a central liquid suction core and a circumferential liquid suction core;
a condensation center and a bionic vein channel are arranged on the first end surface of the condensation end main body;
the central liquid suction core is arranged in the condensation center;
the bionic vein channel is diffused towards the periphery along the condensation center and is communicated with the central liquid suction core;
the circumferential liquid absorption cores are arranged on the condensation end main body, communicated with the bionic vein channels and uniformly distributed around the central liquid absorption core in a circumferential manner;
the bionic vein channel specifically comprises a primary vein channel, a plurality of secondary vein channels and spacing channels;
the primary vein channels are communicated with the central liquid suction core and are uniformly distributed around the condensation center divergent circumference;
the spacing channels are arranged between adjacent primary vein channels and are communicated with the central liquid suction core;
the secondary vein channels extend along the primary vein channels in a diverging manner towards two sides, one end of each secondary vein channel is communicated with the primary vein channel, and the other end of each secondary vein channel is communicated with the adjacent spacing channel;
the central liquid absorbing core and the circumferential liquid absorbing core are both porous structures with the aperture smaller than the groove width of the bionic vein channel;
the groove width of the primary vein channel is gradually reduced from the tail end to the condensation center;
the groove width of the secondary vein channel is gradually reduced from the spacing channel to the primary vein channel.
2. The vapor chamber condensation end of an ultrathin bionic vein gradient wick structure according to claim 1, wherein a hydrophobic structure with gradually decreasing hydrophobicity is arranged inside the bionic vein channel from the tail end of the channel to the condensation center.
3. The vapor chamber condensation end of an ultrathin biomimetic vein gradient wick structure according to claim 2, wherein the hydrophobic structure is obtained by chemical etching and dip coating.
4. A soaking plate cold end of an ultra-thin biomimetic vein gradient wick structure according to claim 1, wherein the circumferential wick is disposed at a bisecting position between the periphery of the cold end body and the central wick.
5. The vapor chamber condensation end of an ultrathin bionic vein gradient wick structure according to claim 1, wherein the central wick and the circumferential wick are both porous structures formed by sintering a wire mesh or porous structures formed by sintering a foam metal.
6. A soaking plate cold end of an ultra-thin biomimetic vein gradient wick structure according to claim 1, wherein the cold end body is convex toward the first end face, and the thickness gradually decreases along the cold center toward the outer periphery.
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| CN115072009A (en) * | 2022-06-13 | 2022-09-20 | 南京航空航天大学 | Foot pad support of bionic royal lotus leaf vein structure |
| CN115135109B (en) * | 2022-07-12 | 2024-07-16 | 哈尔滨工业大学 | Temperature equalization plate structure and electronic equipment for inclined use at any angle |
| CN115371479A (en) * | 2022-08-22 | 2022-11-22 | 新疆华奕新能源科技有限公司 | Bionic spider web wall-dividing type heat exchanger arranged in high mountain canyon |
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| CN102706193B (en) * | 2012-06-28 | 2014-07-02 | 华南理工大学 | Radial gradually-wide type fin-structure grooved panel heat pipe and processing method thereof |
| CN202738359U (en) * | 2012-07-31 | 2013-02-13 | 华南理工大学 | Imbibition core structure of isothermal plate |
| TW201518671A (en) * | 2013-11-08 | 2015-05-16 | Hao Pai | Flat wick structure and vapor chamber having the same |
| CN104089508B (en) * | 2014-06-19 | 2016-05-04 | 华南理工大学 | A kind of manufacture method of liquid-sucking core |
| CN205482499U (en) * | 2016-02-05 | 2016-08-17 | 江苏科技大学 | Porous wick's of plane direction gradient temperature -uniforming plate |
| CN106152846B (en) * | 2016-07-09 | 2017-04-05 | 南京艾科美热能科技有限公司 | A kind of circulating gas-liquid two-phase flow phase change heat exchanger |
| CN107401941B (en) * | 2017-08-28 | 2023-09-26 | 华南理工大学 | Ultrathin soaking plate structure |
| CN108444324B (en) * | 2018-06-22 | 2024-06-11 | 广东工业大学 | Soaking plate |
| CN110108139A (en) * | 2019-04-26 | 2019-08-09 | 华南理工大学 | A kind of soaking plate with support column and groove composite construction |
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