CN113606970B - Ultrathin soaking plate and preparation method thereof - Google Patents
Ultrathin soaking plate and preparation method thereof Download PDFInfo
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- CN113606970B CN113606970B CN202110849578.4A CN202110849578A CN113606970B CN 113606970 B CN113606970 B CN 113606970B CN 202110849578 A CN202110849578 A CN 202110849578A CN 113606970 B CN113606970 B CN 113606970B
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- cover plate
- liquid
- main body
- absorption core
- body cover
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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
- F28D15/0233—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 the conduits having a particular shape, e.g. non-circular cross-section, annular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/087—Heat exchange elements made from metals or metal alloys from nickel or nickel alloys
Abstract
An ultrathin soaking plate comprises a main body cover plate, a bottom plate, a liquid absorption core layer and a liquid cooling part; the main body cover plate is welded with the bottom plate, a closed heat transfer cavity is formed between the main body cover plate and the bottom plate, a phase change working medium is filled in the heat transfer cavity, the liquid absorption core layer is positioned in the heat transfer cavity, and the front surface of the liquid absorption core layer is L-shaped; the liquid cooling component comprises a main body cover plate, a liquid absorption core layer, a plurality of bosses, a liquid cooling component and a liquid transfer cavity, wherein the main body cover plate is provided with the plurality of bosses, the bosses are positioned on the inner surface of the main body cover plate, the heights of the bosses are matched with the thickness of the heat transfer cavity, so that the bosses support the heat transfer cavity, the liquid absorption core layer is provided with avoidance holes matched with the bosses, the bosses penetrate the avoidance holes, and the liquid cooling component is arranged on the outer surface of the main body cover plate. A method for preparing ultrathin soaking plate includes such steps as punching or etching to form each part, welding, vacuumizing and sealing. The ultrathin soaking plate has good heat dissipation effect, and the phase change working medium in the ultrathin soaking plate can effectively circulate, and belongs to the field of heat dissipation.
Description
Technical Field
The invention relates to the field of heat dissipation, in particular to an ultrathin soaking plate and a preparation method thereof.
Background
Electronic power devices have higher and higher heat dissipation requirements and more limited heat dissipation space, and the current heat management by using a liquid-cooling composite phase change element mode is an effective solution, and the heat management performance with low thermal resistance and high temperature uniformity can be obtained by using the efficient heat transfer characteristic of phase change heat transfer mass transfer in a soaking plate.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: provides an ultrathin soaking plate with better heat dissipation effect and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: an ultrathin soaking plate comprises a main body cover plate, a bottom plate, a liquid absorption core layer and a liquid cooling part; the main body cover plate is welded with the bottom plate, a closed heat transfer cavity is formed between the main body cover plate and the bottom plate, a phase-change working medium is filled in the heat transfer cavity, the liquid absorption core layer is positioned in the heat transfer cavity, and the front surface of the liquid absorption core layer is L-shaped; the liquid cooling component is arranged on the outer surface of the main body cover plate, the bosses are located on the inner surface of the main body cover plate, the heights of the bosses are matched with the thickness of the heat transfer containing cavity, so that the bosses support the heat transfer containing cavity, the liquid absorption core layer is provided with avoiding holes matched with the bosses, the bosses penetrate the avoiding holes, and the liquid cooling component is arranged on the outer surface of the main body cover plate. After the structure is adopted, the inner side of the L-shaped liquid absorption core layer is fully reserved with space, and liquid-phase working medium in the liquid absorption core layer structure is outwards diffused in the area under the action of buoyancy after being evaporated.
Preferably, the boss is formed by stamping the main body cover plate.
Preferably, the absorbent core layer comprises foamed aluminum, foamed nickel, aluminum mesh, nickel mesh or nickel wire mesh, and has a porosity of greater than 80% and a pore size of less than 200 μm.
As a preferred, the imbibition core layer includes mutually perpendicular's first imbibition core section and second imbibition core section, and the length of first imbibition core section is greater than the length of second imbibition core section, and the inboard of first imbibition core section is equipped with a plurality of bulge sections, and bulge section is arranged along the inboard linearity of first imbibition core section. After the structure is adopted, the convex sections are arranged at intervals, and the local high heat flow density area is favorable for uniform distribution of a liquid phase working medium in the liquid absorption core, promotes phase change circulation and improves the temperature uniformity of the soaking plate.
Preferably, the liquid cooling member is located at a position corresponding to the position of the second wick section.
Preferably, the liquid cooling part comprises a liquid cooling cover plate, the liquid cooling cover plate is welded on the outer surface of the main body cover plate, so that a liquid cooling cavity is formed between the liquid cooling cover plate and the main body cover plate, an inlet pipe section and an outlet pipe section are arranged on the liquid cooling cover plate, and the inlet pipe section and the outlet pipe section are communicated with the liquid cooling cavity.
Preferably, the thickness of the heat transfer cavity is 0.5 mm-1 mm, and the thickness of the liquid cooling cavity is 2 mm-4 mm.
Preferably, the cross section of the bosses is circular or regular hexagon, and the bosses are uniformly distributed on the inner surface of the main body cover plate in a honeycomb or orthogonal array shape. After the structure is adopted, the structural strength of the soaking plate is increased, and the function of turbulent flow enhanced heat exchange is provided when the working medium carries out phase change circulation heat transfer and mass transfer.
Preferably, the front face of the heat transfer chamber is rectangular and a gap is provided between the outside of the wicking layer and the inside wall of the heat transfer chamber. After the structure is adopted, a circle of communicated space exists at the periphery of the liquid absorption core layer in the heat transfer cavity, and the gas-phase working medium can be diffused and circulated in the space.
The preparation method of the ultrathin soaking plate comprises the following steps:
s1, manufacturing the main cover plate, the bottom plate and the liquid cooling part in a stamping or etching forming mode;
s2, manufacturing the liquid absorption core layer in a blanking forming mode;
s3, assembling the main body cover plate, the liquid absorption core layer, the bottom plate and the liquid cooling part, and connecting the main body cover plate, the liquid absorption core layer, the bottom plate and the liquid cooling part in a brazing mode;
and S4, vacuumizing the heat transfer cavity, injecting the electronic fluorinated liquid, and sealing.
In summary, the present invention has the following advantages:
(1) the soaking plate main body adopts an ultrathin size, the liquid cooling part adopts a conventional size, the soaking plate main body can adapt to a smaller working space, and the cooling effect of the cooling part can be ensured, so that the heat dissipation effect of the soaking plate is ensured.
(2) The liquid absorption core layer is L-shaped and is provided with a convex section, so that evaporation of the phase-change working medium is utilized, spaces are reserved on the inner side and the outer side of the liquid absorption core layer, the gaseous working medium can be fully diffused, and circulation of the working medium is facilitated.
(3) The boss is arranged to facilitate heat exchange between the main body cover plate and the working medium.
Drawings
Fig. 1 is a schematic view of the overall structure of an ultra-thin vapor chamber.
Fig. 2 is an overall structural view of an ultrathin soaking plate after brazing in the preparation process.
Fig. 3 is an exploded view of an ultra-thin vapor chamber prior to brazing during fabrication.
Fig. 4 is a schematic diagram of the internal structure of an ultrathin soaking plate after brazing in the preparation process.
Fig. 5 is a schematic view of an application of an ultra-thin soaking plate.
Wherein, 1 is the bottom plate, 2 is the imbibition layer, 3 is the main part apron, 4 are liquid cooling parts, 5 are annotates the liquid pipe, 6 are the boss, 7 are for dodging the hole, 21 are second imbibition core section, 22 are first imbibition core section, 23 are the bulge section.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example one
As shown in fig. 1 to 4, an ultra-thin vapor chamber comprises a main body cover plate 3, a bottom plate 1, a liquid absorption core layer 2 and a liquid cooling part 4; the main body cover plate is welded with the bottom plate, a closed heat transfer cavity is formed between the main body cover plate and the bottom plate, a phase change working medium is filled in the heat transfer cavity, the liquid absorption core layer is positioned in the heat transfer cavity, and the front surface of the liquid absorption core layer is L-shaped; be equipped with a plurality of bosss 6 on the main part apron, the boss is located the internal surface of main part apron, and the height of boss suits with the thickness that heat transfer appearance chamber to the boss forms the support to heat transfer chamber, opens on the imbibition core layer and dodges the hole 7 with the boss complex, and the boss passes and dodges the hole, and the liquid cooling part is installed in the surface of main part apron.
The boss is formed by stamping the main body cover plate.
The material of the liquid absorption core layer comprises foamed aluminum, foamed nickel, an aluminum net, a nickel net or a nickel wire woven net, the porosity of the liquid absorption core layer is more than 80%, the pore diameter is less than 200 mu m, and the thickness of the liquid absorption core layer is 0.5 mm.
The wick layer includes mutually perpendicular's first wick section 22 and second wick section 21, and the length of first wick section is greater than the length of second wick section, and the inboard of first wick section is equipped with a plurality of protruding sections 23, and the protruding section is arranged along the inboard linearity of first wick section.
The position of the liquid cooling part corresponds to the position of the second liquid suction core section.
The liquid cooling part comprises a liquid cooling cover plate, the liquid cooling cover plate is welded on the outer surface of the main body cover plate, so that a liquid cooling cavity is formed between the liquid cooling cover plate and the main body cover plate, an inlet pipe section and an outlet pipe section are arranged on the liquid cooling cover plate, and the inlet pipe section and the outlet pipe section are communicated with the liquid cooling cavity. The inlet leg is adjacent the first wick section relative to the outlet leg.
The thickness of the heat transfer cavity is 0.5mm, and the thickness of the liquid cooling cavity is 2 mm. The height of the boss is 0.5 mm.
The cross section of the lug bosses is circular or regular hexagon, and the lug bosses are uniformly distributed on the inner surface of the main body cover plate in a honeycomb or orthogonal array shape.
The front face of the heat transfer cavity is rectangular, and a gap is formed between the outer side of the liquid absorption core layer and the inner side wall of the heat transfer cavity.
The liquid cooling intracavity is equipped with the support column, and the coolant liquid is gone into from top to bottom, and the flow through support column realizes the flow equipartition, abundant heat transfer in the plate body.
The main body cover plate, the bottom plate and the liquid cooling cover plate are made of aluminum, the thickness of the main body cover plate and the thickness of the bottom plate are both 0.3mm, and the thickness of the liquid cooling cover plate is 0.5 mm.
The preparation method of the ultrathin soaking plate comprises the following steps:
s1, manufacturing the main cover plate, the bottom plate and the liquid cooling part in a stamping or etching forming mode;
s2, manufacturing the liquid absorption core layer in a blanking forming mode;
s3, assembling the main body cover plate, the liquid absorption core layer, the bottom plate, the liquid injection pipe and the liquid cooling part, and connecting the main body cover plate, the liquid absorption core layer, the bottom plate, the liquid injection pipe and the liquid cooling part in a brazing mode;
and S4, vacuumizing the heat transfer cavity, injecting the electronic fluorinated liquid, and sealing.
In step S1, an inlet and an outlet for the cooling liquid are formed by opening holes on the surface of the liquid-cooling cover plate, and a liquid injection groove externally connected with the liquid injection pipe 5 is reserved on the bottom plate. In step S4, the amount of the injected electronic fluorinated liquid is slightly larger than the total liquid absorption amount of the liquid absorption core layer, and laser welding is performed after sealing, so as to further ensure the sealing property of the weld between the main body cover plate and the bottom plate. In step S3, after the parts are fastened together by the mold, the parts are placed in a vacuum furnace and soldered at about 590 ℃ to ensure that the solder is melted and integrated.
As shown in fig. 5, when the cooling operation is performed, the ultra-thin soaking plate is vertically placed in the gap of the large power battery which is tightly arranged, the first liquid absorption core section is located below, the second liquid absorption core section is located on the left side, the part with the liquid cooling part is located outside the gap, the inlet pipe section and the outlet pipe section are respectively connected with external cooling liquid, so that when the battery works, the liquid cooling part cools the second liquid absorption core section area, thereby realizing the condensation of the working medium and forming local low air pressure at the position, the condensed liquid-phase working medium flows back to the heat dissipation area of the soaking plate under the traction of the liquid absorption core layer, namely the area where the first liquid absorption core section is located, the working medium is heated and evaporated into a gas phase in the area, enters the gas phase diffusion area above, and is driven by the gas pressure to return to the condensation area to complete the phase change cycle.
The arrangement method can also meet the preheating requirement of the large power battery. And high-temperature heating liquid is introduced into the liquid cooling part, the liquid-phase working medium in the second liquid absorption core section is evaporated and diffused to a gas-phase area around the first liquid absorption core section, and after the liquid-phase working medium is subjected to the low-temperature cooling action of an external power battery, the gas-phase working medium is condensed into the liquid-phase working medium in the first liquid absorption core section and flows back to the second liquid absorption core section under the osmotic traction action of the liquid absorption core structure to complete phase change circulation.
Example two
The thickness of imbibition core layer is 1mm, and the thickness in heat transfer appearance chamber is 1mm, and the thickness in liquid cooling chamber is 4 mm. The height of the boss is 1 mm.
The thickness of main part apron and bottom plate is 0.5mm, and the thickness of liquid cooling apron is 1 mm.
The embodiment is not described in the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (8)
1. An ultra-thin soaking plate is characterized in that: comprises a main body cover plate, a bottom plate, a liquid absorption core layer and a liquid cooling part;
the main body cover plate is welded with the bottom plate, a closed heat transfer cavity is formed between the main body cover plate and the bottom plate, a phase change working medium is filled in the heat transfer cavity, the liquid absorption core layer is positioned in the heat transfer cavity, and the front surface of the liquid absorption core layer is L-shaped; the liquid cooling component is arranged on the outer surface of the main body cover plate, the liquid absorption core layer is provided with a plurality of avoidance holes matched with the bosses, the bosses penetrate through the avoidance holes, and the liquid cooling component is arranged on the outer surface of the main body cover plate;
the liquid absorption core layer comprises a first liquid absorption core section and a second liquid absorption core section which are perpendicular to each other, the length of the first liquid absorption core section is larger than that of the second liquid absorption core section, a plurality of protruding sections are arranged on the inner side of the first liquid absorption core section, and the protruding sections are linearly arranged along the inner side of the first liquid absorption core section;
the liquid cooling part comprises a liquid cooling cover plate, the liquid cooling cover plate is welded on the outer surface of the main body cover plate, so that a liquid cooling cavity is formed between the liquid cooling cover plate and the main body cover plate, the bottom plate and the liquid cooling cover plate are all made of aluminum;
the position of the liquid cooling part corresponds to the position of the second liquid suction core section.
2. An ultra-thin vapor chamber as defined in claim 1, wherein: the boss is formed by stamping the main body cover plate.
3. An ultra-thin vapor chamber as defined in claim 1 wherein: the material of the liquid absorption layer comprises foamed aluminum, foamed nickel, an aluminum net or a nickel net, the porosity of the liquid absorption layer is more than 80%, and the pore diameter is less than 200 mu m.
4. An ultra-thin vapor chamber as claimed in claim 3, wherein: the liquid cooling cover plate is provided with an inlet pipe section and an outlet pipe section, and the inlet pipe section and the outlet pipe section are communicated with the liquid cooling cavity.
5. An ultra-thin vapor chamber as defined in claim 4 wherein: the thickness of heat transfer appearance chamber is 0.5mm ~1mm, and the thickness of liquid cooling chamber is 2mm ~4 mm.
6. An ultra-thin vapor chamber as defined in claim 1, wherein: the cross section of the lug bosses is circular or regular hexagon, and the lug bosses are uniformly distributed on the inner surface of the main body cover plate in a honeycomb or orthogonal array shape.
7. An ultra-thin vapor chamber as defined in claim 1, wherein: the front face of the heat transfer cavity is rectangular, and a gap is formed between the outer side of the liquid absorption core layer and the inner side wall of the heat transfer cavity.
8. A method for preparing the ultrathin soaking plate as claimed in any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
s1, manufacturing the main body cover plate, the bottom plate and the liquid cooling part in a stamping or etching forming mode;
s2, manufacturing the liquid absorption core layer in a blanking forming mode;
s3, assembling the main body cover plate, the liquid absorption core layer, the bottom plate, the liquid injection pipe and the liquid cooling part under the action of a clamp, and realizing integration by brazing;
and S4, vacuumizing the heat transfer cavity, injecting the electronic fluorinated liquid, and sealing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110849578.4A CN113606970B (en) | 2021-07-27 | 2021-07-27 | Ultrathin soaking plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110849578.4A CN113606970B (en) | 2021-07-27 | 2021-07-27 | Ultrathin soaking plate and preparation method thereof |
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| CN113606970A CN113606970A (en) | 2021-11-05 |
| CN113606970B true CN113606970B (en) | 2022-09-27 |
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| CN114543572A (en) * | 2022-03-10 | 2022-05-27 | 山东大学 | Soaking plate with honeycomb-like structure composite liquid absorption core, radiator and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005121345A (en) * | 2003-10-20 | 2005-05-12 | Furukawa Electric Co Ltd:The | Plate type heat pipe and method for producing it |
| CN102155858A (en) * | 2011-04-07 | 2011-08-17 | 大连金三维科技有限公司 | Radiator |
| CN107949238A (en) * | 2017-11-10 | 2018-04-20 | 中国船舶重工集团公司第七六研究所 | A kind of soaking plate heat dissipating device with support column arrangement and preparation method thereof |
| CN108110376A (en) * | 2017-12-22 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of fire-retardant cooling type lithium ionic cell module |
| CN208723000U (en) * | 2018-06-25 | 2019-04-09 | 华南理工大学 | Liquid-cooled device applied to high current density fuel cell heat transfer samming |
| CN109152294A (en) * | 2018-09-21 | 2019-01-04 | 禾臻电子科技（上海）有限公司 | The hot superconducting radiator of liquid-cooled |
| CN110035642A (en) * | 2019-05-21 | 2019-07-19 | 广东工业大学 | A kind of liquid-cooled heat-conducting block and water-cooling type radiator |
| CN111536817A (en) * | 2020-06-04 | 2020-08-14 | 北京中石伟业科技无锡有限公司 | Ultra-thin vapor chamber of gas-liquid channel separation |
| CN213042910U (en) * | 2020-09-08 | 2021-04-23 | 广州智冷节能科技有限公司 | Liquid cooling system with integrated design |
| CN112839498A (en) * | 2021-03-19 | 2021-05-25 | 南宁八菱科技股份有限公司 | Aluminum brazing type soaking plate |
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- 2021-07-27 CN CN202110849578.4A patent/CN113606970B/en active Active
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| 一种高效散热冷板的设计;黄飞等;《机械工程师》;20161210;第223-224页 * |
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