CN110763056A - Heat pipe, preparation method thereof and electronic equipment - Google Patents
Heat pipe, preparation method thereof and electronic equipment Download PDFInfo
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- CN110763056A CN110763056A CN201910972703.3A CN201910972703A CN110763056A CN 110763056 A CN110763056 A CN 110763056A CN 201910972703 A CN201910972703 A CN 201910972703A CN 110763056 A CN110763056 A CN 110763056A
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- Prior art keywords
- cavity
- chamber
- solution medium
- heat pipe
- heat
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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
- F28D15/0283—Means for filling or sealing 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
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- 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
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
Abstract
The application relates to a heat pipe and a preparation method thereof, wherein the heat pipe comprises a shell, a semipermeable membrane arranged in an inner cavity of the shell and a solution medium accommodated in the inner cavity, the shell comprises an evaporation end and a condensation end, the inner cavity is divided into a first cavity and a second cavity by the semipermeable membrane, the first cavity corresponds to the evaporation end, and the second cavity corresponds to the condensation end; the evaporation end can absorb heat to enable the solution medium in the first cavity to be heated and evaporated to generate gas, the gas can penetrate through the semipermeable membrane to enter the second cavity, the gas is liquefied in the second cavity and dissolved in the solution medium in the second cavity and releases heat, the concentration of the solution medium in the second cavity is smaller than that of the solution medium in the first cavity, and therefore the solvent in the solution medium in the second cavity flows back to the first cavity through the semipermeable membrane. The preparation method of the semipermeable membrane is simple, the cost is low, the structure of the heat pipe is simple due to the arrangement of the semipermeable membrane, and the processing difficulty and the processing cost of the heat pipe are reduced.
Description
Technical Field
The present disclosure relates to heat pipe technologies, and in particular, to a heat pipe, a manufacturing method thereof, and an electronic device.
Background
The traditional heat pipe is internally provided with a capillary structure, the liquid backflow is mainly realized through the capillary structure through the capillary action, the capillary structure is mainly copper powder or a metal woven mesh, the copper powder or the metal woven mesh is required to be fixed inside the heat pipe through high-temperature sintering, the process is complex, and the cost is high.
Disclosure of Invention
In a first aspect of the present application, an embodiment provides a heat pipe to solve the technical problems of complex structure and high cost of the heat pipe.
A heat pipe comprises a shell, a semipermeable membrane arranged in an inner cavity of the shell and a solution medium contained in the inner cavity, wherein the shell comprises an evaporation end and a condensation end, the semipermeable membrane divides the inner cavity into a first chamber and a second chamber, the first chamber corresponds to the evaporation end, and the second chamber corresponds to the condensation end;
the evaporation end can absorb heat and make solution medium in the first cavity is heated and evaporates to produce gas, gas can permeate the semipermeable membrane gets into the second cavity, and liquefy in the second cavity and dissolve in solution medium in the second cavity releases heat, makes solution medium's in the second cavity concentration is less than solution medium's in the first cavity concentration, thereby makes solvent in the solution medium in the second cavity passes through the semipermeable membrane flows back to the first cavity.
In the heat pipe, the inner cavity of the shell is provided with the semipermeable membrane which divides the inner cavity into the first cavity and the second cavity; the heat pipe comprises an evaporation end and a condensation end, and environmental heat can be transferred from the evaporation end to the condensation end and released at the condensation end, so that the rapid transfer of heat and the rapid backflow of a solvent of a solution medium are realized. The preparation method of the semipermeable membrane is simple, the cost is low, the structure of the heat pipe is simple due to the arrangement of the semipermeable membrane, and the processing difficulty and the processing cost of the heat pipe are reduced.
In one embodiment, the semi-permeable membrane is perpendicular to the length direction of the heat pipe, such that the first chamber and the second chamber are arranged in the length direction of the heat pipe.
In one embodiment, the semi-permeable membrane is perpendicular to the thickness direction of the heat pipe, such that the first chamber and the second chamber are arranged in the thickness direction of the heat pipe.
In one embodiment, the device comprises a support part fixed in the inner cavity of the shell, the semipermeable membrane is attached to the support part, and the solvent of the solution medium in the first cavity or the solvent of the solution medium in the second cavity can pass through the support part.
In one embodiment, the supporting portion is provided with a through hole, or the supporting portion is a net structure.
In one embodiment, the housing is made of a metal material or a polymer material; the wall thickness of the shell is 0.1 mm-0.12 mm.
In a second aspect of the present application, an embodiment provides a method for manufacturing a heat pipe, so as to solve the technical problems of complex manufacturing process and high cost of the heat pipe.
A preparation method of a heat pipe comprises the following steps:
providing a shell, wherein the shell is provided with an inner cavity;
injecting a solution medium into the inner cavity;
providing a semi-permeable membrane; and
securing the semi-permeable membrane to the inner cavity of the housing such that the inner cavity is divided into a first chamber and a second chamber;
the shell comprises an evaporation end and a condensation end, the first chamber corresponds to the evaporation end, and the second chamber corresponds to the condensation end; the evaporation end can absorb heat and make solution medium in the first cavity is heated and evaporates to produce gas, gas can permeate the semipermeable membrane gets into the second cavity, and liquefy in the second cavity and dissolve in solution medium in the second cavity releases heat, makes solution medium's in the second cavity concentration is less than solution medium's in the first cavity concentration, thereby makes solvent in the solution medium in the second cavity passes through the semipermeable membrane flows back to the first cavity.
According to the preparation method of the heat pipe, the semipermeable membrane is fixed in the inner cavity of the shell, the inner cavity of the shell is divided into the first cavity and the second cavity by the semipermeable membrane, and the heat pipe comprising the evaporation end and the condensation end can be prepared. The ambient heat can be transferred from the evaporation end to the condensation end, so that the rapid transfer of heat and the rapid backflow of the solvent of the solution medium are realized. The preparation method of the heat pipe is simple, and the traditional process of forming the capillary structure by high-temperature sintering is omitted, so that the process is relatively simple, the processing difficulty is reduced, and the manufacturing cost is reduced. And the requirement on the material of the shell of the heat pipe is reduced, the material of the shell has more choices, and the shape of the shell of the heat pipe has more possibilities.
In one embodiment, the condensation end is a sealed structure; the evaporation end is provided with an opening and comprises a cover body, and the cover body can open or close the opening.
In one embodiment, after the step of providing a semi-permeable membrane and before the step of fixing the semi-permeable membrane to the inner cavity of the housing, the method further comprises the steps of:
providing a support portion and fixing the semi-permeable membrane to the support portion.
In one embodiment, the step of securing the semi-permeable membrane to the interior cavity of the housing comprises:
and the supporting part is fixed in the inner cavity of the shell in a bonding or welding mode, so that the semipermeable membrane is fixed in the inner cavity of the shell, and the solution medium is positioned in the second cavity.
In one embodiment, after the step of fixing the semi-permeable membrane to the inner cavity of the housing, the method further comprises the following steps:
and injecting a solution medium into the first chamber.
In a third aspect of the present application, an embodiment provides an electronic device to solve the technical problems of complex manufacturing process and high cost of the heat pipe.
An electronic device comprises an electronic component and the heat pipe, wherein the evaporation end is in contact with the electronic component; the electronic component can generate heat when working, the evaporation end can absorb the heat and transfer the heat to the condensation end, and the condensation end can release the heat.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1a is an exploded view of an electronic device according to an embodiment;
FIG. 1b is an enlarged view of the structure of the portion F of the electronic device shown in FIG. 1 a;
FIG. 2a is a front view of a heat pipe according to an embodiment;
FIG. 2b is a cross-sectional view taken along section A-A of the heat pipe of FIG. 2a, wherein the gas permeating the semi-permeable membrane of the first chamber enters the second chamber;
FIG. 3 is a cross-sectional view of section A-A of the heat pipe of FIG. 2a, wherein a solvent of the solution medium in the second chamber permeates the semi-permeable membrane into the first chamber;
FIG. 4 is a flowchart illustrating a method for manufacturing a heat pipe according to an embodiment;
fig. 5 is a flowchart of a method for manufacturing a heat pipe according to another embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In one embodiment, as shown in fig. 1a and 1b, an electronic device 500 is provided. The electronic device 500 includes a display screen assembly 510, a center frame 520, and a battery cover 530. The display screen assembly 510 and the battery cover 530 are respectively fixed to both sides of the middle frame 520, and form an external structure of the electronic device 500 together with a partial structure of the middle frame 520. A main board 540 and an electronic component 560 are provided in the electronic apparatus 500. It is understood that the electronic component 560 may be a battery or the camera head assembly 550 or other electronic components, and is not limited thereto. The electronic component 560 may be fixed to the main board 540, or may be fixed to any portion in the electronic apparatus 500, and is not limited thereto. The electronic component 560 can generate heat in an operating state.
As shown in fig. 1b, in an embodiment, a heat pipe 10 is disposed in the electronic device 500, the heat pipe 10 is a heat transfer element that transfers heat by virtue of phase change of working fluid inside the heat pipe 10, and includes an evaporation end 170 and a condensation end 180, the evaporation end 170 can absorb heat and transfer the heat to the condensation end 180, and the condensation end 180 can release the heat. The evaporation end 170 of the heat pipe 10 is in contact with the electronic component 560 capable of generating heat, and may or may not be fixed, and the condensation end 180 is far away from the electronic component 560 capable of generating heat. The heat that electronic components 560 during operation produced can be absorbed by evaporating end 170 and transmit to condensing end 180, and condensing end 180 releases the heat to the environment for electronic components 560's heat can be very fast cooling, avoids the normal operating of too high temperature influence electronic components 560.
As shown in fig. 2a and 2b, in one embodiment, the heat pipe 10 includes a housing 100 and a semi-permeable membrane 130 located inside the housing 100. The casing 100 is provided with an inner cavity 101, the casing 100 is tubular or rectangular or other polyhedral structure, and the outer contour of the cross section of the casing 100 is circular or square or polygonal. The case 100 is closed at one end and provided with an opening (not shown) at the other end, and the opening may be opened and closed by a cover (not shown). In one embodiment, the cover is a non-detachable structure and can be welded to seal the opening. The material of the housing 100 is a metal material or a polymer material, such as pure copper or nickel alloy; the wall thickness of the case 100 is 0.1mm to 0.12 mm. It is understood that the material of the housing may be other materials with better heat conductivity, and the wall thickness of the housing 100 may be other dimensions according to the selected material, so that only the service strength of the heat pipe 10 needs to be ensured.
The semi-permeable membrane 130 is secured within the inner chamber 101 and divides the inner chamber 101 into a first chamber 110 and a second chamber 120. Solution media are arranged in the first chamber 110 and the second chamber 120, and the solution media in the first chamber 110 and the solution media in the second chamber 120 are separated by a semipermeable membrane 130. The first chamber 110 corresponds to the evaporation end 170, and the second chamber 120 corresponds to the condensation end 180. The first chamber 110 is located at one end of the housing 100 where the inner cavity 101 can be opened and closed, i.e., the evaporation end 170 can be opened or closed; the second chamber 120 is located at a sealed end of the housing 100, i.e., the condensation end 180 is a closed structure. In one embodiment, the solution medium in the first chamber 110 does not fill the entire space of the first chamber 110, and the solution medium in the second chamber 120 does not fill the entire space of the second chamber 120. It is understood that the solution medium in the first chamber 110 is the same as the solution medium in the second chamber 120, that is, the solute and the solvent of the solution medium in the first chamber 110 are the same as the solute and the solvent of the solution medium in the second chamber 120, respectively, and the concentration of the solution medium in the first chamber 110 is the same as the concentration of the solution medium in the second chamber 120. In one embodiment, the solvent of the solution medium in the first chamber 110 and the solution medium in the second chamber 120 is water or alcohol. In another embodiment, the solution medium in the first chamber 110 is different from the solution medium in the second chamber 120, in that the solute of the solution medium in the first chamber 110 is different from the solute of the solution medium in the second chamber 120, but the solvents of the solution medium in the first chamber 110 and the solution medium in the second chamber 120 are both water or alcohol, and the concentration of the solution medium in the first chamber 110 is the same as the concentration of the solution medium in the second chamber 120. In another embodiment, the solution medium in the first chamber 110 and the solution medium in the second chamber 120 are both pure water.
As shown in fig. 2b and 3, after the evaporation end 170 absorbs heat, the solution medium in the first chamber 110 is heated and evaporated to generate gas, and the gas can permeate the semi-permeable membrane 130 into the second chamber 120. Since the condensation end 180 does not absorb heat from the environment, the temperature of the condensation end 180 is lower than that of the evaporation end 170, the gas is liquefied at the condensation end 180 and dissolved in the solution medium in the second chamber 120, so that the concentration of the solution medium in the first chamber 110 is greater than that of the solution medium in the second chamber 120, the osmotic pressure of the solution medium in the first chamber 110 is greater than that of the solution medium in the second chamber 120, the solvent of the solution medium in the second chamber 120 can permeate the semi-permeable membrane 130 into the first chamber 110 and be dissolved in the solution medium in the first chamber 110, so that the concentration of the solution medium in the first chamber 110 is reduced, and the concentration of the solution medium in the second chamber 120 is increased until the concentration of the solution medium in the first chamber 110 is equal to that in the second chamber 120, and the backflow of the solvent of the solution medium is completed. It is understood that the gas releases heat after being liquefied in the second chamber 120, and the heat is released to the environment through the condensation end 180, completing the heat transfer process in which the evaporation end 170 absorbs heat from the environment and transfers the heat to the condensation end 180, and the condensation end 180 releases the heat to the environment.
In the heat pipe 10 of the present application, the inner cavity 101 of the housing 100 is provided with the semi-permeable membrane 130, the inner cavity 101 is divided into the first chamber 110 and the second chamber 120, the first chamber 110 is located at the evaporation end 170, the second chamber 120 is located at the condensation end 180, and the gas or the solvent can permeate the semi-permeable membrane 130. After the evaporation end 170 absorbs heat from the environment, the solvent of the solution medium in the first chamber 110 evaporates endothermically to generate gas, so that the temperature of the environment where the evaporation end 170 is located is lowered. The gas can penetrate through the semi-permeable membrane 130, enter the second chamber 120, liquefy and release heat, and dissolve in the solution medium in the second chamber 120, so that the temperature of the second chamber 120 is increased, the heat is transferred to the environment through the condensation end 180, the transfer of the environmental heat from the evaporation end 170 to the condensation end 180 is completed, and the heat pipe 10 has the function of transferring the environmental heat. The solution medium in the first chamber 110 is heated to generate gas, the concentration of the solution medium in the first chamber 110 increases, the gas is liquefied after penetrating through the semi-permeable membrane 130 and dissolved in the solution medium in the second chamber 120, and the concentration of the solution medium in the second chamber 120 decreases and is lower than that of the solution medium in the first chamber 110. The solvent of the solution medium in the second chamber 120 permeates the semi-permeable membrane 130 into the first chamber 110 until the concentration of the solution medium in the first chamber 110 and the concentration of the solution medium in the second chamber 120 return to equal, completing the return flow of the liquid. The solvent of the solution medium in the first chamber 110 absorbs heat when gas-liquid two-phase conversion is performed in the first chamber 110, so that the evaporation end can absorb heat, and the gas releases heat when gas-liquid two-phase conversion is performed in the second chamber 120, so that the condensation end 180 can dissipate heat, and rapid heat transfer is realized.
In an embodiment, the number of the semi-permeable membrane 130 may be multiple, such that the inner cavity 101 is divided to include the first chamber 110, the second chamber 120, the third chamber, the fourth chamber, and the like, which are sequentially disposed, and is not limited herein. Heat transfer may be performed between the first chamber 110 and the second chamber 120, between the second chamber 120 and the third chamber, and between the third chamber and the fourth chamber. In the non-operating state, that is, when the temperatures of the heat pipe 10 are equal at all places without heat transfer, the concentration of the solution medium in the first chamber 110 of the first chamber 110, the concentration of the solution medium in the second chamber 120 of the second chamber 120, the concentration of the solution medium in the third chamber, and the concentration of the solution medium in the fourth chamber are equal.
In one embodiment, the heat pipe 10 has a linear structure, and the semi-permeable membrane 130 is perpendicular to the length direction of the heat pipe 10, such that the first chamber 110 and the second chamber 120 are arranged in the length direction of the heat pipe 10. It will be appreciated that the length of the heat pipe 10 may extend along a straight line, or may extend along a line segment such as a curved line or a broken line. In one embodiment, the semi-permeable membrane 130 is positioned at an intermediate position along the length of the heat pipe 10 such that the evaporation end 170 and the condensation end 180 have the same length dimension. In another embodiment, the semi-permeable membrane 130 is positioned in the inner chamber 101 near the opening, i.e., the length dimension of the evaporation end 170 is less than the length dimension of the condensation end 180. When the heat pipe 10 is used for heat transfer, the length of the evaporation end 170 is small, so that the temperature can be rapidly increased after the heat pipe absorbs the ambient heat, and gas can be rapidly generated; the condensation end 180 has a large length, a large space for heat dissipation, and a high heat dissipation speed, so that the ambient heat can be rapidly transferred from the first chamber 110 to the second chamber 120.
In another embodiment, the heat pipe 10 may have an L-shaped structure, a U-shaped structure, a C-shaped structure, a rectangular parallelepiped structure, a square body structure, or a polyhedron structure, which is not limited herein. The semi-permeable membrane 130 may also be perpendicular to the length of the heat pipe 10.
In another embodiment, the semi-permeable membrane 130 is perpendicular to the thickness direction of the heat pipe 10, such that the first chamber 110 and the second chamber 120 are arranged in the thickness direction of the heat pipe 10, and the first chamber 110 and the second chamber 120 are stacked in the thickness direction of the heat pipe 10. It will be appreciated that the thickness direction of the heat pipe 10 is perpendicular to the length direction of the heat pipe 10. When the heat pipe 10 is used, along the thickness direction of the heat pipe 10, one side of the heat pipe 10 has a relatively high temperature, and the other side of the heat pipe 10 has a relatively low temperature, and the heat of the side with the higher temperature can be transferred to the side with the lower temperature through the heat pipe 10 and released into the environment.
As shown in fig. 2b and 3, in one embodiment, the heat pipe 10 includes a support portion 140 fixed to the inner cavity 101. The support 140 is fixed to the cavity 101 by means of double-sided tape or welding. The semipermeable membrane 130 is attached to the support part 140, and the shape and size of the support part 140 are the same as those of the semipermeable membrane 130. The support part 140 is located at a side of the semi-permeable membrane 130 facing the first chamber 110 or at a side of the semi-permeable membrane 130 facing the second chamber 120. In one embodiment, the supporting portion 140 is formed with a through hole (not shown) such that a portion of the structure of the semi-permeable membrane 130 is exposed to the first chamber 110 and the second chamber 120, and the gas generated by the evaporation of the solvent of the solution medium in the first chamber 110 can pass through the through hole and permeate the semi-permeable membrane 130 into the second chamber 120; or the solvent of the solution medium in the second chamber 120 can pass through the through-holes and permeate the semi-permeable membrane 130 into the first chamber 110. In another embodiment, the supporting portion 140 is a net structure, such that a part of the structure of the semi-permeable membrane 130 is exposed to the first chamber 110 and the second chamber 120 at the same time, and also such that gas generated by the evaporation of the solvent of the solution medium in the first chamber 110 by heating can pass through the supporting portion 140 and permeate through the semi-permeable membrane 130 into the second chamber 120, and the solvent of the solution medium in the second chamber 120 can permeate through the semi-permeable membrane 130 into the first chamber 110. The support 140 has a supporting function on the semi-permeable membrane 130, and the support 140 is fixed to the inner cavity 101 of the housing to fix the semi-permeable membrane 130 in the inner cavity 101, and the support 140 does not affect the permeation of the gas and the solvent of the solution medium in the second chamber 120 through the semi-permeable membrane 130.
As shown in fig. 4, in an embodiment, a method for manufacturing a heat pipe 10 is provided, which includes the following steps:
providing a shell, wherein the shell is provided with an inner cavity 101;
injecting solution medium into the inner cavity 101;
providing a semi-permeable membrane 130; and
securing the semi-permeable membrane 130 to the inner cavity 101 of the housing such that the inner cavity 101 is partitioned to include a first chamber 110 and a second chamber 120;
the housing 100 comprises an evaporation end 170 and a condensation end 180, the first chamber 110 corresponds to the evaporation end 170, and the second chamber 120 corresponds to the condensation end 180; the evaporation end 170 can absorb heat and transfer the heat to the condensation end 180, and the condensation end 180 can release the heat. Specifically, the evaporation end 170 can absorb heat to evaporate the solution medium in the first chamber 110 by heating to generate gas, the gas can penetrate through the semipermeable membrane 130 into the second chamber 120, and liquefy in the second chamber 120 to be dissolved in the solution medium in the second chamber 120 and release heat, so that the concentration of the solution medium in the second chamber 120 is less than that of the solution medium in the first chamber 110, and thus the solvent in the solution medium in the second chamber 120 flows back to the first chamber 110 through the semipermeable membrane 130.
In an embodiment, a housing 100 having an inner cavity 101 is provided, and the material of the housing 100 is a metal material or a polymer material; the wall thickness of the case 100 is 0.1mm to 0.12 mm. It is understood that the material of the casing 100 may be other materials with better heat conductivity, and the wall thickness of the casing 100 may be other dimensions according to the selected material, so that only the service strength of the heat pipe 10 needs to be ensured. One end of the casing 100 is a sealing structure, and the other end of the casing 100 is provided with an opening (not shown), and the opening is provided with a cover (not shown), which can open or close the inner cavity 101, or the cover is directly welded at the opening and is not detachable. It is understood that the condensation end 180 is a sealed structure and the evaporation end 170 is located at the open end.
As shown in FIG. 5, in one embodiment, after the step of providing the housing 100, and before the step of providing the semi-permeable membrane 130, the steps of: solution medium is injected into the inner cavity 101. Specifically, the solution medium is injected through the opening of the housing 100 using a drainage tube, and then the housing 100 is vertically placed such that the solution medium is located at an end of the inner cavity 101 away from the opening.
As shown in fig. 5, in one embodiment, after the step of providing the semi-permeable membrane 130 and before the step of fixing the semi-permeable membrane 130 to the housing 100, the following steps are further included: a support 140 is provided and the semi-permeable membrane 130 is secured to the support 140. Specifically, the supporting portion 140 is provided with through holes or the supporting portion 140 is a net structure. The semi-permeable membrane 130 is attached to the support 140 by adhesive or mechanical fastening. The shape and size of the supporting portion 140 are the same as those of the semi-permeable membrane 130, or the size of the semi-permeable membrane 130 is slightly smaller than that of the supporting portion 140, but it is required to ensure that the semi-permeable membrane 130 can cover the through holes or meshes of the supporting portion 140.
As shown in FIG. 5, in one embodiment, the step of securing the semi-permeable membrane 130 to the inner chamber 101 comprises: the support 140 is fixed to the housing 100 by means of bonding or welding, so that the semi-permeable membrane 130 is fixed to the inner cavity 101 and the solution medium in the inner cavity 101 is always located in the second chamber 120. Specifically, the edge of the supporting portion 140 provided with the semi-permeable membrane 130 is attached with a double-sided adhesive tape, and the supporting portion 140 is fed into the inner cavity 101 through the guide rod, so that the double-sided adhesive tape is prevented from contacting the casing 100 in the process, and the supporting portion 140 is prevented from being obstructed from moving. It is understood that the double-sided adhesive tape may be fixed to a portion of the edge of the supporting portion 140, and the supporting portion 140 is disposed to be inclined when moving in the inner cavity 101, so that the position where the double-sided adhesive tape is disposed does not contact the housing 100. After the support part 140 reaches the set position of the inner cavity 101 of the housing, the support part 140 is vertically placed so that the double-sided tape is adhered to the housing 100. The support 140 may be perpendicular to the longitudinal direction of the housing, or may be slightly inclined, and is not limited herein.
In another embodiment, the casing 100 and the supporting portion 140 are made of metal, the supporting portion 140 is vertically disposed after the supporting portion 140 is fed into the inner cavity 101 through a guide rod and reaches a set position, and the edge of the supporting portion 140 is fixed to the casing 100 by welding, so as to prevent the supporting portion 140 from moving. In the process that the supporting part 140 is installed in the inner cavity 101, the shell is vertically or nearly vertically placed, so that the solution medium in the inner cavity 101 is prevented from flowing out of the inner cavity 101, or the solution medium is prevented from influencing the installation and fixation of the supporting part 140. After the supporting part 140 is fixed in the inner cavity 101, the semi-permeable membrane 130 divides the inner cavity 101 into a first chamber 110 and a second chamber 120, the inner cavity 101 between the semi-permeable membrane 130 and the opening is the first chamber 110, the inner cavity 101 between the semi-permeable membrane 130 and the end of the shell 100 facing away from the opening is the second chamber 120, and the solution medium is located in the second chamber 120. It is understood that the solution medium does not fill the second chamber 120, and there is no space for the gas to enter the second chamber 120 and liquefy.
As shown in FIG. 5, in one embodiment, after the step of securing the semi-permeable membrane 130 to the inner chamber 101, the following steps are included: solution medium is injected into the inner cavity 101, and the solution medium is positioned in the first chamber 110. Specifically, through the opening and adopting the solution medium to pour into in the first chamber 110 of drainage tube, the solution medium can not be full of first chamber 110, avoids the solution medium in the first chamber 110 to be heated the gaseous nothing accommodation space that produces. Then, the inner cavity 101 is vacuumized, so that a negative pressure is formed in the inner cavity 101, and the solvent of the solution medium in the first chamber 110 can be evaporated at a lower temperature, for example, the solvent can be evaporated at 40 ℃ or 50 ℃ to generate gas, so that heat transfer can be performed at a lower temperature. Then, the opening of the casing is sealed by a cover plate, and the sealing method can be welding or bonding, and the heat pipe 10 is manufactured. It can be understood that, after the inner cavity 101 is vacuumized, the case 100 made of metal can be prevented from being oxidized to affect heat dissipation.
According to the preparation method of the heat pipe 10, the solution medium is injected into the inner cavity 101, the semi-permeable membrane 130 is fixed on the supporting part 140, the supporting part 140 is fixed on the inner cavity 101 through the double-sided tape or the welding mode, the inner cavity 101 is divided into the first cavity 110 and the second cavity 120 by the semi-permeable membrane 130, and the solution medium is located in the second cavity 120. Then, a solution medium is injected into the first chamber 110, and the opening is sealed with a cover plate, thereby manufacturing the heat pipe 10. Wherein the first chamber 110 is located at the evaporation end 170; the second chamber 120 is located at the condensation end 180. The evaporation end 170 can absorb heat and transfer the heat to the condensation end 180, and the condensation end 180 can release the heat. The heat pipe 10 of the present application is simple in manufacturing method, and by providing the semipermeable membrane 130, the transfer of ambient heat from one end of the heat pipe 10 to the other end can be achieved, and the conventional process requiring high-temperature sintering to form a capillary structure is eliminated, so that the process is relatively simple. The semipermeable membrane 130 is fixed in the inner cavity 101 through the supporting part 140, so that the processing difficulty is reduced, and the manufacturing cost is reduced. The requirement for the material of the casing 100 of the heat pipe 10 is reduced, the material of the casing 100 has more choices, and the shape of the casing 100 of the heat pipe 10 has more possibilities.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A heat pipe is characterized by comprising a shell, a semipermeable membrane arranged in an inner cavity of the shell and a solution medium accommodated in the inner cavity, wherein the shell comprises an evaporation end and a condensation end, the inner cavity is divided into a first chamber and a second chamber by the semipermeable membrane, the first chamber corresponds to the evaporation end, and the second chamber corresponds to the condensation end;
the evaporation end can absorb heat and make solution medium in the first cavity is heated and evaporates to produce gas, gas can permeate the semipermeable membrane gets into the second cavity, and liquefy in the second cavity and dissolve in solution medium in the second cavity releases heat, makes solution medium's in the second cavity concentration is less than solution medium's in the first cavity concentration, thereby makes solvent in the solution medium in the second cavity passes through the semipermeable membrane flows back to the first cavity.
2. A heat pipe as claimed in claim 1 wherein the semi-permeable membrane is perpendicular to the length of the heat pipe such that the first and second chambers are aligned along the length of the heat pipe.
3. A heat pipe as claimed in claim 1 wherein said semi-permeable membrane is perpendicular to the thickness direction of said heat pipe such that said first chamber and said second chamber are aligned in the thickness direction of said heat pipe.
4. A heat pipe as claimed in claim 1 including a support fixed to said housing interior, said semi-permeable membrane being attached to said support, solvent of solution medium in said first chamber or solvent of solution medium in said second chamber being able to pass through said support.
5. A heat pipe according to claim 4 wherein the support portion is perforated or has a mesh structure.
6. A heat pipe according to claim 1 wherein the housing is made of a metal material or a polymer material; the wall thickness of the shell is 0.1 mm-0.12 mm.
7. A preparation method of a heat pipe is characterized by comprising the following steps:
providing a shell, wherein the shell is provided with an inner cavity;
injecting a solution medium into the inner cavity;
providing a semi-permeable membrane; and
securing the semi-permeable membrane to the inner cavity of the housing such that the inner cavity is divided into a first chamber and a second chamber;
the shell comprises an evaporation end and a condensation end, the first chamber corresponds to the evaporation end, and the second chamber corresponds to the condensation end; the evaporation end can absorb heat and make solution medium in the first cavity is heated and evaporates to produce gas, gas can permeate the semipermeable membrane gets into the second cavity, and liquefy in the second cavity and dissolve in solution medium in the second cavity releases heat, makes solution medium's in the second cavity concentration is less than solution medium's in the first cavity concentration, thereby makes solvent in the solution medium in the second cavity passes through the semipermeable membrane flows back to the first cavity.
8. A method for making a heat pipe as defined in claim 7 wherein said cold end is a sealed structure; the evaporation end is provided with an opening and comprises a cover body, and the cover body can open or close the opening.
9. A method of fabricating a heat pipe as defined in claim 7, further comprising, after the step of providing a semi-permeable membrane and before the step of securing the semi-permeable membrane to the interior cavity of the housing, the steps of:
providing a support portion and fixing the semi-permeable membrane to the support portion.
10. A method of fabricating a heat pipe as defined in claim 9 wherein the step of securing the semi-permeable membrane to the interior chamber of the housing comprises:
and the supporting part is fixed in the inner cavity of the shell in a bonding or welding mode, so that the semipermeable membrane is fixed in the inner cavity of the shell, and the solution medium is positioned in the second cavity.
11. A method of fabricating a heat pipe as defined in claim 7, wherein after the step of fixing the semi-permeable membrane to the inner cavity of the housing, the method further comprises the steps of:
and injecting a solution medium into the first chamber.
12. An electronic device, comprising an electronic component and the heat pipe of any one of claims 1 to 6, wherein the evaporation end is in contact with the electronic component; the electronic component can generate heat when working, the evaporation end can absorb the heat and transfer the heat to the condensation end, and the condensation end can release the heat.
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| CN201910972703.3A CN110763056B (en) | 2019-10-14 | 2019-10-14 | Heat pipe, preparation method thereof and electronic equipment |
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| CN201910972703.3A CN110763056B (en) | 2019-10-14 | 2019-10-14 | Heat pipe, preparation method thereof and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117685805A (en) * | 2024-01-31 | 2024-03-12 | 中国电建集团华东勘测设计研究院有限公司 | Separate heat pipe using semi-permeable membrane and ionic liquid and operation method |
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| CN117685805A (en) * | 2024-01-31 | 2024-03-12 | 中国电建集团华东勘测设计研究院有限公司 | Separate heat pipe using semi-permeable membrane and ionic liquid and operation method |
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|---|---|
| CN110763056B (en) | 2021-06-08 |
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