CN108801019B - Phase change heat transfer element with multilayer liquid absorption core structure and manufacturing method thereof - Google Patents
Phase change heat transfer element with multilayer liquid absorption core structure and manufacturing method thereof Download PDFInfo
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- CN108801019B CN108801019B CN201810836443.2A CN201810836443A CN108801019B CN 108801019 B CN108801019 B CN 108801019B CN 201810836443 A CN201810836443 A CN 201810836443A CN 108801019 B CN108801019 B CN 108801019B
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- heat transfer
- transfer element
- phase change
- change heat
- core structure
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- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 29
- 230000008859 change Effects 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000002356 single layer Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 238000005245 sintering Methods 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 230000004323 axial length Effects 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention relates to a phase change heat transfer element with a multilayer liquid absorption core structure, which comprises a vacuumized pipe body, wherein a sealed inner cavity is formed in the pipe body, liquid working media are filled in the sealed inner cavity, the inner side of the middle part of the pipe body is provided with the multilayer liquid absorption core structure, and the inner sides of two ends of the pipe body are provided with single-layer liquid absorption core structures. And to a method of making a phase change heat transfer element having a multi-layered wick structure. The invention has a multilayer liquid absorption core structure, the capillary performance and the heat dissipation performance of the multilayer liquid absorption core structure are the superposition of the multilayer liquid absorption core structure, and compared with the phase change heat transfer element with the traditional single-layer liquid absorption core structure, the heat transfer performance of the multilayer liquid absorption core structure is greatly improved, the heat transfer element can meet the requirements of heat dissipation occasions with high heat flux density, and the multilayer liquid absorption core structure belongs to the field of phase change heat transfer.
Description
Technical Field
The invention relates to the field of phase-change heat transfer, in particular to a phase-change heat transfer element with a multilayer liquid absorption core structure and a manufacturing method thereof.
Background
The phase change heat transfer element has extremely high heat conductivity and good soaking characteristics, and has been widely used since ask oneself years. Because the wick structure manufactured by the traditional processing method is difficult to meet the requirements of the current high-heat-flux heat dissipation occasion, the special processing method is gradually applied to the processing of the high-performance wick structure, and the high-performance heat pipe is researched and produced, but the large-scale application of the high-performance phase-change heat transfer element is limited due to the defects of high equipment cost, low production efficiency and the like of the special processing method.
Aiming at the contradiction between the high heat dissipation requirement of the electronic equipment and the lower heat dissipation capability of the phase change heat transfer element at the present stage, a heat pipe with a multi-layer liquid absorption core structure is provided, and the capillary property and the heat transfer property of the heat pipe are greatly improved; meanwhile, the production and manufacturing method is simple, the cost is low, and the method is suitable for mass industrialized production and application.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention aims at: a phase change heat transfer element having a multi-layered wick structure and a method of making the same are provided that can meet the demands of high heat flux heat dissipation applications.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the phase change heat transfer element with the multilayer liquid absorption core structure comprises a vacuumized pipe body, wherein a sealed inner cavity is formed in the pipe body, liquid working media are filled in the sealed inner cavity, the inner side of the middle of the pipe body is provided with the multilayer liquid absorption core structure, and the inner sides of the two ends of the pipe body are provided with the single-layer liquid absorption core structure.
As one preferred aspect, a phase change heat transfer element having a multi-layered wick structure includes a plurality of metal layers having a wick structure disposed on an inner side thereof; the two ends of the tube body are provided with a metal layer, and the middle part of the tube body is sequentially stacked with a plurality of metal layers from outside to inside.
Preferably, the metal layer is an aluminum layer or a copper layer.
Preferably, the liquid absorbing core structure is one or more of a micro-groove structure, a fiber sintering structure, a powder sintering porous structure, a foam metal structure and a silk screen sintering structure.
Preferably, the total number of layers of the liquid suction core structure in the middle of the tube body is 2-5; the axial length of the single-layer liquid absorption core structure is 5-10 mm.
Preferably, the liquid working medium is deionized water or acetone.
A method of making a phase change heat transfer element having a multi-layered wick structure, comprising the steps of: processing a liquid suction core structure on the surface of the T-shaped metal sheet; the T-shaped metal sheet is curled from the small end to the large end, and finally the T-shaped metal sheet is curled, sintered and welded to form a tube body structure, and two ends of the large end of the T-shaped metal sheet form two ends of the tube body; and (5) pouring liquid working medium into the pipe body, and vacuumizing and sealing.
Preferably, the mandrel inserted into the tube body used in the sintering step is a stainless steel rod, a ceramic rod or a graphite rod, and the diameter of the mandrel is the inner diameter of the tube body.
Preferably, the welding process is reflow, inert gas welding or laser welding.
Preferably, the vacuum degree is lower than 50Pa after the vacuuming and sealing treatment; the filling amount of the liquid working medium is 10-80% of the volume of the multi-layer liquid suction core structure.
In general, the invention has the following advantages:
1. The liquid absorbing core structure has the advantages that the capillary performance and the heat dissipation performance of the liquid absorbing core structure are the superposition of the multi-layer liquid absorbing core structure, and compared with the phase change heat transfer element with the traditional single-layer liquid absorbing core structure, the heat transfer performance of the liquid absorbing core structure is greatly improved, and the liquid absorbing core structure can meet the requirements of high heat flux heat dissipation occasions.
2. The phase change heat transfer element with the multilayer liquid absorption core structure is made of T-shaped metal sheets through the processes of curling, sintering, welding and the like, the liquid absorption core structure can be made by adopting the traditional processing means, and the manufacturing process is simple; the heat resistance between the liquid absorption core structure layers is reduced through a sintering process, a sealed inner cavity is formed through a welding process, and the tightness of the heat pipe is ensured. Compared with the high-efficiency heat pipe manufactured by adopting a special processing means, the high-efficiency heat pipe has high processing efficiency and low cost, and can meet the requirements of mass production and application.
3. Has good capillary performance and higher limit power.
Drawings
Fig. 1 is a cross-sectional view of a phase change heat transfer element having a multi-layered wick structure.
Fig. 2 is an enlarged partial view of a phase change heat transfer element having a multi-layered wick structure.
Fig. 3 is a "T" shaped metal sheet with a micro-grooved wick.
Wherein, 1 is the body, 2 is sealed inner chamber, 11 is individual layer wick structure, 12 is multilayer wick structure.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The phase change heat transfer element with the multilayer liquid absorption core structure comprises a phase change heat transfer element pipe body, wherein the phase change heat transfer element pipe body is made of T-shaped copper sheets through a curling and sintering process, liquid absorption cores with single-layer micro-groove structures are arranged at two ends of the heat transfer element pipe body, and the middle part of the heat transfer element pipe body is provided with the liquid absorption cores with the multilayer micro-groove structures; the connection joints of the two ends and the side wall of the heat transfer element tube body are sealed to form a sealed inner cavity, deionized water is poured into the sealed inner cavity to serve as liquid working medium, and then the sealed inner cavity is vacuumized and sealed.
The surface of the T-shaped copper sheet is provided with a micro-groove structure, and in the embodiment, the thickness of the T-shaped copper sheet is 0.2mm, and the micro-groove structure is processed by a plow-cutting-extrusion process, so that the depth is about 0.12mm. The T-shaped copper sheet is curled from the small end to the large end as shown by an arrow in fig. 3, so that the large end of the T-shaped copper sheet forms a single-layer micro-groove-structure liquid suction core at two ends of the heat transfer element pipe body, the single-layer liquid suction core structure at two ends of the heat transfer element pipe body has the function of storing liquid working media, and the liquid working media can enter each layer of liquid suction core in the middle. Winding the curled T-shaped copper sheet on a graphite core rod, wherein the diameter of the graphite core rod is the same as the inner diameter of the heat pipe body, the inner diameter of the heat pipe body is about 4mm, the outer diameter of the heat pipe body is about 6mm in the embodiment, clamping the curled copper sheet and the core rod by using a die, and placing the copper sheet and the core rod into a vacuum atmosphere protection resistance furnace for sintering treatment so as to reduce the contact thermal resistance between the multilayer liquid absorption cores, wherein the sintering temperature in the embodiment is 850 ℃, and the heat preservation time is 1h. After sintering, the welding treatment is carried out on the connecting seam of the side wall of the heat transfer element pipe body, the reflow welding process is adopted in the embodiment, low-temperature soldering paste is uniformly smeared on the connecting seam of the side wall, the mold is used for clamping, and then the heating and heat preservation treatment is carried out, so that the soldering paste is guaranteed to be fully melted and filled in the connecting seam of the side wall, and the air tightness of the heat pipe body is guaranteed.
And (3) carrying out necking and welding sealing treatment on one end of the welded heat pipe body, then carrying out necking on the other end, vacuumizing and pouring working medium, wherein deionized water is used as working medium in the embodiment, the liquid filling rate is 60%, and then carrying out sealing treatment by adopting inert gas shielded welding.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (8)
1. The phase change heat transfer element comprises a vacuumized pipe body, a sealed inner cavity is arranged in the pipe body, and liquid working medium is filled in the sealed inner cavity, and the phase change heat transfer element is characterized in that: the inner side of the middle part of the tube body is provided with a multi-layer liquid absorption core structure, and the inner sides of the two ends of the tube body are provided with a single-layer liquid absorption core structure;
the phase change heat transfer element comprises a plurality of metal layers, and a liquid absorption core structure is arranged on the inner side of each metal layer; the two ends of the tube body are provided with a metal layer, and a plurality of metal layers are sequentially stacked in the middle of the tube body from outside to inside;
The manufacturing method comprises the following steps: processing a liquid suction core structure on the surface of the T-shaped metal sheet; the T-shaped metal sheet is curled from the small end to the large end, and finally the T-shaped metal sheet is curled, sintered and welded to form a tube body structure, and two ends of the large end of the T-shaped metal sheet form two ends of the tube body; and (5) pouring liquid working medium into the pipe body, and vacuumizing and sealing.
2. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the metal layer is an aluminum layer or a copper layer.
3. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the liquid absorption core structure is one or more of a micro-groove structure, a fiber sintering structure, a powder sintering porous structure, a foam metal structure and a silk screen sintering structure.
4. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the total number of layers of the liquid suction core structure in the middle of the tube body is 2-5; the axial length of the end part of the pipe body provided with the single-layer liquid absorption core structure is 5-10 mm.
5. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the liquid working medium is deionized water or acetone.
6. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the core rod inserted into the pipe body used in the sintering step is a stainless steel rod, a ceramic rod or a graphite rod, and the diameter of the core rod is the inner diameter of the pipe body.
7. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: the welding process is reflow soldering, inert gas shielded welding or laser welding.
8. A method of making a phase change heat transfer element having a multi-layered wick structure in accordance with claim 1, wherein: after the vacuumizing sealing treatment, the vacuum degree is lower than 50 Pa; the filling amount of the liquid working medium is 10% -80% of the structural volume of the multilayer liquid suction core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836443.2A CN108801019B (en) | 2018-07-26 | 2018-07-26 | Phase change heat transfer element with multilayer liquid absorption core structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836443.2A CN108801019B (en) | 2018-07-26 | 2018-07-26 | Phase change heat transfer element with multilayer liquid absorption core structure and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108801019A CN108801019A (en) | 2018-11-13 |
| CN108801019B true CN108801019B (en) | 2024-05-07 |
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| CN201810836443.2A Active CN108801019B (en) | 2018-07-26 | 2018-07-26 | Phase change heat transfer element with multilayer liquid absorption core structure and manufacturing method thereof |
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Families Citing this family (1)
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| CN113137886A (en) * | 2021-04-08 | 2021-07-20 | 南京工业职业技术大学 | 5G mobile phone honeycomb bionic liquid absorption core vapor chamber and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS63129297A (en) * | 1986-11-18 | 1988-06-01 | Showa Alum Corp | Heat pipe |
| CN101410685A (en) * | 2006-03-03 | 2009-04-15 | 伊路米耐克斯公司 | Heat pipe with nanotstructured wicking material |
| CN102305564A (en) * | 2011-08-26 | 2012-01-04 | 华南理工大学 | Fiber sintering type micro heat pipe and manufacturing method thereof |
| CN104764349A (en) * | 2015-04-17 | 2015-07-08 | 广东新创意科技有限公司 | Composite type liquid suction core ultra-thin heat pipe and manufacturing method thereof |
| CN105202956A (en) * | 2014-06-26 | 2015-12-30 | 江苏格业新材料科技有限公司 | Manufacturing method of composite vapor chamber with base plate made of molybdenum-copper or tungsten-copper alloy and other heat sink materials |
| CN106017176A (en) * | 2016-07-18 | 2016-10-12 | 华南理工大学 | Ultrathin heat pipe for heat dissipation of mobile phone and manufacturing method thereof |
| CN107167008A (en) * | 2017-04-28 | 2017-09-15 | 华北电力大学 | A kind of ultra-thin panel heat pipe and its manufacture method |
| CN208998614U (en) * | 2018-07-26 | 2019-06-18 | 华南理工大学 | A kind of phase-change heat transfer element with multilayer liquid sucting core structure |
-
2018
- 2018-07-26 CN CN201810836443.2A patent/CN108801019B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63129297A (en) * | 1986-11-18 | 1988-06-01 | Showa Alum Corp | Heat pipe |
| CN101410685A (en) * | 2006-03-03 | 2009-04-15 | 伊路米耐克斯公司 | Heat pipe with nanotstructured wicking material |
| CN102305564A (en) * | 2011-08-26 | 2012-01-04 | 华南理工大学 | Fiber sintering type micro heat pipe and manufacturing method thereof |
| CN105202956A (en) * | 2014-06-26 | 2015-12-30 | 江苏格业新材料科技有限公司 | Manufacturing method of composite vapor chamber with base plate made of molybdenum-copper or tungsten-copper alloy and other heat sink materials |
| CN104764349A (en) * | 2015-04-17 | 2015-07-08 | 广东新创意科技有限公司 | Composite type liquid suction core ultra-thin heat pipe and manufacturing method thereof |
| CN106017176A (en) * | 2016-07-18 | 2016-10-12 | 华南理工大学 | Ultrathin heat pipe for heat dissipation of mobile phone and manufacturing method thereof |
| CN107167008A (en) * | 2017-04-28 | 2017-09-15 | 华北电力大学 | A kind of ultra-thin panel heat pipe and its manufacture method |
| CN208998614U (en) * | 2018-07-26 | 2019-06-18 | 华南理工大学 | A kind of phase-change heat transfer element with multilayer liquid sucting core structure |
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| CN108801019A (en) | 2018-11-13 |
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