CN110678042A - Hot-pressing type flexible phase change soaking zone/board based on polymer film and manufacturing method thereof - Google Patents
Hot-pressing type flexible phase change soaking zone/board based on polymer film and manufacturing method thereof Download PDFInfo
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- CN110678042A CN110678042A CN201910938703.1A CN201910938703A CN110678042A CN 110678042 A CN110678042 A CN 110678042A CN 201910938703 A CN201910938703 A CN 201910938703A CN 110678042 A CN110678042 A CN 110678042A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/203—Cooling means for portable computers, e.g. for laptops
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a hot-pressing type flexible phase change soaking zone/plate based on a polymer film, which comprises a flexible shell, a liquid absorbing core and a liquid working medium; the flexible shell comprises a flexible polymer film, and an opening of the flexible polymer film is sealed through hot pressing, so that a vacuumized sealed cavity is formed in a hot pressing line; the liquid absorption core is positioned in the flexible shell; liquid working medium is filled in the flexible shell. Also relates to a manufacturing method of the hot-pressing type flexible phase change soaking belt/plate based on the polymer film. The invention has simple structure and process, convenient manufacture, high performance, easy folding, lightness and thinness, can meet the heat dissipation requirements of all electronic devices on the market, and belongs to the field of phase change heat dissipation.
Description
Technical Field
The invention relates to the field of phase change heat dissipation, in particular to a hot-pressing type flexible phase change soaking belt/board based on a polymer film and a manufacturing method thereof.
Background
The phase change heat dissipation device has extremely high heat conductivity, is widely applied to the heat dissipation field of electronic devices such as notebook computers, smart phones and LED lamps, and is an effective means for solving the heat dissipation problem of the electronic devices. With the successive proposition and industrialization of concepts such as flexible screens and folding screens in recent years, the field of microelectronic device heat dissipation generates more challenging requirements of flexible and ultrathin heat dissipation devices. Most of traditional phase change heat dissipation devices are metal shells and do not have flexibility, and the repeated folding service condition of the folding screen technology requires that the heat dissipation device must be provided with a flexible heat radiator which has the same service life as a screen.
The existing flexible phase change radiator is respectively in the following forms: (1) the metal shell flexible heat pipe can be bent according to the installation space, but cannot be repeatedly folded and bent; (2) the heat insulation section of the radiator adopts a flexible pipe, and the heating section and the condensation section adopt metal pipes which can be repeatedly folded, but are thicker and are usually round pipes; (3) the integrally formed polymer heat pipe has good flexibility, but is thick, and is difficult to machine a microstructure on the inner wall of the polymer pipe, so that the heat transfer performance is generally poor. The structural form of the existing flexible radiator limits the development of a flexible radiating device to the direction of ultra-thinness, and is not an ideal scheme for solving the radiating problem of the flexible screen electronic device.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: a thin and flexible polymer film-based hot-pressed flexible phase-change soaking belt/board and a manufacturing method thereof are provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the hot-pressing type flexible phase change soaking zone/plate based on the polymer film comprises a flexible shell, a liquid absorption core and a liquid working medium; the flexible shell comprises a flexible polymer film, and an opening of the flexible polymer film is sealed through hot pressing, so that a vacuumized sealed cavity is formed in a hot pressing line; the liquid absorption core is positioned in the flexible shell; liquid working medium is filled in the flexible shell.
Preferably, the flexible shell comprises two flexible polymer films, the two flexible polymer films are stacked into two layers, and four sides are hot-pressed to form the flexible shell; or the flexible shell comprises a piece of flexible polymer film, the piece of flexible polymer film is folded into two layers, and three edges are hot-pressed to form the flexible shell; or the flexible housing comprises a section of a flexible polymer film cylinder and hot pressing both ends to form the flexible housing.
Preferably, the hot-pressed flexible phase-change soaking belt/plate based on the polymer film further comprises a support positioned in the flexible shell, and the support is bonded with the flexible polymer film through hot pressing; the wick is a microstructure inside the flexible polymer film.
Preferably, the support is a metal sheet or a polymer sheet; the metal sheets or the polymer sheets have a distance of 1-3mm to form a channel of the gas working medium.
Preferably, the wick is a flexible wick that is bonded to the flexible polymeric film by heat and pressure.
Preferably, the wick is a wire mesh or a porous polymer.
Preferably, the spacing between the wire meshes, between the porous polymers, between the wire meshes and the flexible shell or between the porous polymers and the flexible shell is 1-3mm, so that the gas working medium channel is formed.
The manufacturing method of the hot-pressing type flexible phase change soaking belt/board based on the polymer film comprises the following steps: (1) sealing the opening of the flexible polymer film by a hot pressing method to form a flexible shell with only one opening; (2) placing a flexible wick or support into the flexible housing of step (1); (3) inserting the perfusion tube through the opening edge of the flexible shell, sealing the opening edge by glue and fixing the perfusion tube; (4) vacuumizing and filling liquid working media through a filling pipe; (5) sealing the opening edge by adopting a hot pressing method; (6) removing the redundant part of the flexible shell and the filling pipe along the hot-pressing sealing edge; (7) reducing the pressure drop of the thermo-compression thermometer, and connecting a flexible liquid absorbing core or a support with a flexible polymer film.
Preferably, in the steps (1) and (5), the hot pressing method is that the mould is heated to 200-400 ℃, then the pressure of 300-1500 kPa is applied to compress the two layers of flexible polymer films, the pressure is removed after the flexible polymer films are kept for 10-30 s, and the flexible polymer films are cooled to room temperature, so that the two layers of polymers at the compressed position are melted and bonded into a whole.
Preferably, in step (5), the pressing part is 2-5mm away from the end of the perfusion tube.
In summary, the present invention has the following advantages:
1. according to the invention, the flexible shell is manufactured by adopting a hot-pressing bonding mode of the flexible polymer film, so that the phase-change heat dissipation device has good flexibility, the defect that the existing metal shell phase-change heat dissipation device does not have flexibility is solved, the microstructure can be conveniently processed on the inner surface of the polymer film, the problem that the microstructure is difficult to process on the inner wall of the existing polymer pipe is solved, the capillary force of the phase-change heat dissipation belt/plate is improved, and the heat transfer performance of the flexible phase-change heat dissipation belt/plate is improved.
2. The invention provides a phase change heat dissipation belt/plate in a gas-liquid coplanar manner, which reduces the thickness of a phase change heat dissipation device in structural form and accords with the trend of development of micro-electronic devices in the direction of lightness and thinness.
3. The invention has simple structure and process, convenient manufacture and high performance, adopts the high-temperature resistant flexible polymer film, can meet the heat dissipation requirements of all electronic devices on the market, and is particularly suitable for the heat dissipation requirements of flexible screen and folding screen electronic devices.
4. The liquid absorption core can not only ensure the backflow of the liquid working medium, but also prevent the flexible shell from deforming during the vacuum pumping and working.
5. The liquid absorbing core is provided with a pore which is consistent with the length of the flexible shell along the length direction of the soaking zone/plate and is used as a channel of gas working medium in the phase-change soaking zone/plate.
Drawings
Fig. 1 is a schematic structural diagram of a hot-pressed flexible phase-change soaking plate based on a polymer film according to the first embodiment.
Fig. 2 is a sectional view of the flexible phase change soaking plate according to the first embodiment.
Fig. 3 is a sectional view of the heat-pressing type flexible phase change soaking plate according to the second embodiment.
Fig. 4 is a sectional view of the thermocompression flexible phase change soaking plate according to the third embodiment.
Fig. 5 is a schematic structural diagram in the fabrication of the hot-pressed flexible phase-change soaking plate based on the polymer film according to the first embodiment.
Wherein, 1 is flexible casing, 2 is the imbibition core, 3 is the passageway of gaseous working medium, 4 is the infusion pipe, 5 is the sealed limit, 6 is epoxy.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example one
A hot-pressing type flexible phase change soaking plate based on a polymer film comprises a flexible shell, a liquid absorption core and a liquid working medium.
The flexible shell comprises a flexible polymer film, and an opening of the flexible polymer film is sealed through hot pressing, so that a vacuumized sealed cavity is formed in a hot pressing line. The flexible shell comprises two flexible polymer films, the two flexible polymer films are stacked into two layers, and the four edges are hot-pressed to form the flexible shell. The flexible polymer film is a polyimide film, and has a length of 200mm and a width of 100 mm.
The liquid absorption core is positioned in the flexible shell, two copper wire nets are adopted, the wire diameter is 200um, and a 3mm interval is reserved between the two copper wire nets to form a channel of a gas working medium.
Liquid working medium is filled in the flexible shell, and deionized water is adopted.
The manufacturing method of the hot-pressing type flexible phase change soaking plate based on the polymer film comprises the following steps:
(1) aligning and superposing two flexible polymer films, and carrying out hot-pressing sealing on three sides by using hot-pressing equipment to form a flexible shell with an opening on only one side; the hot pressing temperature is 350 ℃, the pressure is 0.7MPa, and the pressing time is kept for 15 seconds; the hot press mold has a rectangular cross section with a width of 1mm, and thus the two sheets of flexible polymer films after hot pressing have a sealing edge with a width of 1 mm.
(2) Two copper wire nets are respectively placed on the left side and the right side of the interior of the flexible shell, the length of each copper wire net is 175mm, the width of each copper wire net is 45mm, and a gas working medium channel is formed in the middle of the flexible shell.
(3) And inserting the filling pipe into the shell through the opening edge of the shell, sealing the last opening edge of the shell by glue epoxy resin, and fixing the filling pipe.
(4) The vacuum pumping and filling equipment is connected through the filling pipe, the internal pressure of the soaking plate is pumped to 0Pa, and then 2ml of deionized water is filled as a liquid working medium.
(5) And sealing the last edge of the ultrathin flexible heat pipe by adopting a hot pressing method, and controlling the distance between the compression position and the tail end of the perfusion pipe to be 2-5 mm.
(6) And removing the redundant part of the shell and the filling pipe along the outer side of the hot-pressing sealing edge.
(7) And finally, adhering the polyimide shell and the copper wire mesh liquid absorption core together by adopting a hot pressing process with the temperature of 200 ℃, the pressure of 0.4Mpa and the pressing time of 5 seconds, and finishing the manufacture of the hot-pressing type flexible phase change soaking plate based on the polymer.
Example two
In the embodiment, the hot-pressing type flexible phase change soaking plate based on the polymer film adopts a piece of copper wire mesh as a liquid absorbing core. The copper wire mesh is positioned in the middle of the flexible shell, and gas working medium channels are formed on two sides of the copper wire mesh.
The flexible shell comprises a piece of flexible polymer film, the piece of flexible polymer film is folded into two layers, and the three edges are hot-pressed to form the flexible shell.
The embodiment is not described in the first embodiment.
EXAMPLE III
The embodiment is a hot-pressing type flexible phase change soaking plate based on a polymer film, wherein a flexible shell comprises a section of flexible polymer film cylinder, and the two ends are hot-pressed to form the flexible shell. In use, as shown in fig. 4, the sheet may be bent 180 degrees along its length.
The embodiment is not described in the first embodiment.
Except for the way mentioned in the above embodiment, the liquid working medium may be one or more of pure water, acetone, ethanol and other working media; the preferred material of the flexible shell is a polyimide film; the preferred material for the wick is 200 mesh copper wire mesh; the wick is a microstructure on the inside of the flexible polymer film, in which case a support is used. These variations are all within the scope of the present invention.
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 changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The hot-pressing type flexible phase change soaking zone/plate based on the polymer film is characterized in that: comprises a flexible shell, a liquid absorption core and a liquid working medium; the flexible shell comprises a flexible polymer film, and an opening of the flexible polymer film is sealed through hot pressing, so that a vacuumized sealed cavity is formed in a hot pressing line; the liquid absorption core is positioned in the flexible shell; liquid working medium is filled in the flexible shell.
2. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 1, wherein:
the flexible shell comprises two flexible polymer films, wherein the two flexible polymer films are laminated into two layers and are hot-pressed on four sides to form the flexible shell;
or the flexible shell comprises a piece of flexible polymer film, the piece of flexible polymer film is folded into two layers, and three edges are hot-pressed to form the flexible shell;
or the flexible housing comprises a section of a flexible polymer film cylinder and hot pressing both ends to form the flexible housing.
3. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 1, wherein: the flexible polymer film is arranged in the flexible shell, and the flexible polymer film is arranged in the flexible shell; the wick is a microstructure inside the flexible polymer film.
4. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 3, wherein: the support is a metal sheet or a polymer sheet; the metal sheets or the polymer sheets have a distance of 1-3mm to form a channel of the gas working medium.
5. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 1, wherein: the wick is a flexible wick that is bonded to the flexible polymer film by hot pressing.
6. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 5, wherein: the wick is a wire mesh or a porous polymer.
7. A polymer film based flexible phase change thermal soaking tape/sheet according to claim 6, wherein: the spaces of 1-3mm are arranged among the metal wire meshes, among the porous polymers, between the metal wire meshes and the flexible shell or between the porous polymers and the flexible shell, so that a channel of gas working medium is formed.
8. Method for the production of hot-pressed flexible phase change soaking tapes/plates based on polymer films according to any of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) sealing the opening of the flexible polymer film by a hot pressing method to form a flexible shell with only one opening;
(2) placing a flexible wick or support into the flexible housing of step (1);
(3) inserting the perfusion tube through the opening edge of the flexible shell, sealing the opening edge by glue and fixing the perfusion tube;
(4) vacuumizing and filling liquid working media through a filling pipe;
(5) sealing the opening edge by adopting a hot pressing method;
(6) removing the redundant part of the flexible shell and the filling pipe along the hot-pressing sealing edge;
(7) and reducing the temperature and pressure of the hot pressing method, and connecting the flexible liquid absorption core or the support with the flexible polymer film.
9. A method of making a hot-pressed flexible phase change soaking zone/plate based on polymer film according to claim 8, characterized in that: in the steps (1) and (5), the hot pressing method is that the mould is heated to 200-400 ℃, then 300-1500 kPa pressure is applied to compress the two layers of flexible polymer films, the pressure is removed after the mould is kept for 10-30 s, and the flexible polymer films are cooled to room temperature, so that the two layers of polymers at the compressed position are melted and bonded into a whole.
10. A method of making a hot-pressed flexible phase change soaking zone/plate based on polymer film according to claim 8, characterized in that: in the step (5), the distance between the pressing part of the hot pressing method and the tail end of the perfusion tube is 2-5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910938703.1A CN110678042A (en) | 2019-09-30 | 2019-09-30 | Hot-pressing type flexible phase change soaking zone/board based on polymer film and manufacturing method thereof |
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| CN201910938703.1A CN110678042A (en) | 2019-09-30 | 2019-09-30 | Hot-pressing type flexible phase change soaking zone/board based on polymer film and manufacturing method thereof |
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