CN209914359U

CN209914359U - Extension plate type heat pipe

Info

Publication number: CN209914359U
Application number: CN201920252666.4U
Authority: CN
Inventors: 黄晓峰; 徐栋; 刘飞
Original assignee: Changzhou Hengchuang Heat Management Co Ltd
Current assignee: Changzhou Hengchuang Thermal Management System Co ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-01-07
Anticipated expiration: 2029-02-28

Abstract

The utility model discloses an extend template formula heat pipe, extend template formula heat pipe include the flat plate portion and set up extension and a plurality of fin portion on the flat plate portion, and the flat plate portion is provided with first cavity, and every fin portion all is provided with the second cavity, and the extension is provided with the third cavity, and first cavity, second cavity and third cavity all communicate, and the heat source corresponds third cavity and extension contact. The utility model discloses an extend template type heat pipe, the third cavity on second cavity and the extension on the first cavity on the flat plate portion and the fin portion all communicates, has reduced thermal contact resistance, has promoted the radiating efficiency, and in addition, extension and heat source contact compare in traditional structure, the utility model discloses an extend template type heat pipe can overcome and receive the problem that installation space restricted and can't install, has optimized installation space.

Description

Extension plate type heat pipe

Technical Field

The utility model relates to a heat dissipation technical field especially relates to an extend template type heat pipe.

Background

With the development of electronic components towards miniaturization, high power and high performance, the heat dissipation problem gradually becomes a bottleneck problem restricting the development of high-integration electronic components along with higher heat flux density in the development process. The flat heat pipe can transfer and diffuse a heat source with high heat density rapidly due to high heat conductivity and good temperature uniformity, meets the requirements of electronic equipment on compactness, reliability, flexibility and the like of a heat dissipation device, and gradually becomes an excellent choice for researching and solving the surface heat dissipation problem of high-power equipment.

Under the general condition, because of the space limitation of the installation position of the electronic equipment, at present, the flat heat pipe is already applied to replace the traditional pure metal radiator fin, the heat resistance of a heat source and air can be reduced to the maximum extent, and the heat convection and the heat radiation on the surface of the radiator are effectively enhanced. In the use process, due to the space limitation of the installation position of the electronic equipment, the electronic equipment and the radiator cannot be installed together generally, but the electronic equipment and the substrate on the radiator are connected through a metal sheet, and when the radiator is used, the heat of the electronic equipment is conducted to the radiator through the metal sheet to dissipate the heat. However, the metal sheet and the heat sink substrate have a large thermal contact resistance, which may cause the temperature equalization capability of the heat sink to be reduced, so that the heat dissipation capability is not good, and the heat dissipation requirement cannot be satisfied.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the problems in the prior art, an extended plate type heat pipe which has a good heat dissipation effect and is convenient to install is provided.

The utility model provides a technical scheme that its technical problem adopted is: an extension template formula heat pipe, extension template formula heat pipe includes the dull and stereotyped portion and sets up extension and a plurality of fin portion on the dull and stereotyped portion, the dull and stereotyped portion is provided with first cavity, every the fin portion all is provided with the second cavity, the extension is provided with the third cavity, first cavity the second cavity and the third cavity all communicates.

Further, the flat plate portion, the fin portion, and the extension portion are of an integrally molded structure.

Further, the extending portion and the flat plate portion are located on the same horizontal plane, or the extending portion is connected with the lower end face of the flat plate portion.

Further, the flat plate portion and every all be provided with connecting portion between the fin portion, connecting portion with the flat plate portion reaches the fin portion all communicates, connecting portion include first connecting portion and second connecting portion, first connecting portion with be formed with the line of bending between the second connecting portion, first connecting portion are isosceles right triangle, the second connecting portion are right trapezoid, the long limit of right trapezoid is 45 with the contained angle between one of them waist, another waist of right trapezoid with a right angle side of isosceles right triangle by the line of bending constitutes.

Furthermore, the plurality of fin portions are located on the same side of the flat plate portion, the plurality of fin portions are arranged in parallel, and an included angle α is formed between the fin portions and the flat plate portion.

Furthermore, a plurality of isolated parts are arranged in the first cavity and/or the second cavity, and the isolated parts divide the corresponding first cavity and/or the second cavity into a plurality of fluid passages which are communicated with each other.

Furthermore, the isolated part is a dot structure or a block structure arranged in the first cavity and/or the second cavity, and the isolated part is formed by attaching corresponding side walls of the first cavity and/or the second cavity.

Furthermore, a closed cavity is arranged on the extension-type plate heat pipe and comprises a first cavity, a second cavity and a third cavity, and a phase-change working medium is filled in the closed cavity.

Furthermore, the extension part has a plurality of, and a plurality of extension parts bend respectively on different height.

The utility model has the advantages that: the utility model provides a board-like heat pipe of extension type, the third cavity on second cavity and the extension on the first cavity on the flat plate portion and the fin portion all communicates, has reduced thermal contact resistance, has promoted the radiating efficiency, and in addition, the user can be according to the operation such as bending of concrete installation demand to the extension to make its and heat source contact, compare in traditional structure, the utility model discloses a problem that receives the installation space restriction and can't install can be overcome to extension board-like heat pipe, has optimized installation space.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of an extended plate type heat pipe according to a first embodiment of the present invention;

FIG. 2 is a front view of the extended template heat pipe of FIG. 1;

FIG. 3 is a cross-sectional view A-A of the elongated plate heat pipe of FIG. 2;

FIG. 4 is a schematic structural diagram of a fin portion of the extended plate heat pipe shown in FIG. 1;

FIG. 5 is a cross-sectional view B-B of the fin portion of FIG. 4;

FIG. 6 is a cross-sectional view of the elongated plate heat pipe of FIG. 2 taken along C-C;

FIG. 7 is a top view of the extended template heat pipe of FIG. 1;

FIG. 8 is a schematic structural view of the extended plate heat pipe shown in FIG. 1 in a use state;

fig. 9 is a schematic structural view of an extended plate heat pipe according to a second embodiment of the present invention;

fig. 10 is a schematic structural view of an extended plate heat pipe according to a third embodiment of the present invention.

The names and the numbers of the parts in the figure are respectively as follows:

transition cavity 401 of first cavity 101 of flat plate part 10

Heat source 1 isolation 103 first connection 41

Second cavity 201 and second connecting portion 42 of fin portion 20

Third cavity 301 of extension 30 of connecting part 40

Outer casing 2

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1 to 6, a first embodiment of the present invention provides an extended plate heat pipe for transferring and diffusing heat of a heat source 1 (e.g., an electronic component or an electronic device), the extended plate heat pipe includes a flat plate portion 10, an extended portion 30 and a plurality of fin portions 20, the extended portion 30 is disposed on the flat plate portion 10, a first cavity 101 is disposed on the flat plate portion 10, a second cavity 201 is disposed on each fin portion 20, a third cavity 301 is disposed on the extended portion 30, the first cavity 101 is communicated with the second cavity 201 and the third cavity 301, a closed cavity (not shown) is disposed on the extended plate heat pipe, the closed cavity includes the first cavity 101, the second cavity 201 and the third cavity 301, a phase-change working medium (not shown) is filled in the closed cavity, the heat source 1 is in contact with the extended portion 30 corresponding to the third cavity 301, the fin portion 20 has a heat radiation function. During working, the liquid phase change working medium in the third cavity 301 absorbs heat of the heat source 1 and then vaporizes, the gaseous phase change working medium rapidly expands to fill the whole closed cavity, after the gaseous phase change working medium in the second cavity 201 dissipates heat at the fin part 20, the gaseous phase change working medium liquefies, and then the liquid phase change working medium flows back to the third cavity 301 through the first cavity 101.

In addition, fluid channels (not shown) are arranged in the first cavity 101 and the second cavity 201, and after the liquid phase-change working medium in the first cavity 101 absorbs the heat of the heat source to be vaporized, the gaseous phase-change working medium can rapidly expand along the fluid channels to fill the whole closed cavity. Specifically, a plurality of isolated portions 103 are provided in both the first cavity 101 and the second cavity 201, the plurality of isolated portions 103 in the first cavity 101 partition the first cavity 101 to form a plurality of fluid passages communicating with each other, and the plurality of isolated portions 103 in the second cavity 201 partition the second cavity 201 to form a plurality of fluid passages communicating with each other. Specifically, the isolated portion 103 is a dot-shaped structure or a block-shaped structure disposed in the first cavity 101 and the second cavity 201, and the isolated portion 103 is formed by attaching corresponding sidewalls of the first cavity 101 and the second cavity 201. In addition, the width of the fluid channel is 2-10mm, so that the gaseous phase-change working medium can flow rapidly along the fluid channel, and meanwhile, the liquid phase-change working medium in the second cavity 201 can flow into the first cavity 101 along the fluid channel. Preferably, the width of the fluid channel in this embodiment is 4 mm.

It is understood that in other embodiments not shown, the isolated portion 103 in the first cavity 101 or the isolated portion 103 in the second cavity 201 may be omitted, and in this case, the isolated portions 103 may separate the corresponding first cavity 101 and/or second cavity 201 to form a plurality of fluid passages communicating with each other. The isolated part 103 is a dot-shaped structure or a block-shaped structure arranged in the first cavity 101 and/or the second cavity 201, and the isolated part 103 is formed by attaching corresponding side walls of the first cavity 101 and/or the second cavity 201.

Referring to fig. 7, the flat plate portion 10 is substantially a plate-shaped structure, the fin portions 20 are elongated flat plate-shaped structures, the plurality of fin portions 20 are located on the same side of the flat plate portion 10 and are arranged in parallel, and an included angle α is formed between the fin portions 20 and the flat plate portion 10, and is greater than 0 degree and less than 180 degrees, so that a three-dimensional structure is formed between the fin portions 20 and the flat plate portion 10, and further, the heat dissipation efficiency is improved. In the present embodiment, the angle α is 90 °.

Referring to fig. 1, 2 and 6, in the present embodiment, the extending portion 30 is substantially in a long plate shape, and the extending portion 30 and the flat plate portion 10 are located on the same horizontal plane.

In the present embodiment, the flat plate portion 10, the fin portion 20, and the extension portion 30 are formed integrally, which reduces contact thermal resistance and facilitates processing. It is understood that, in other embodiments, not shown, the flat plate portion 10, the fin portion 20 and the extending portion 30 may be separate components, and when in use, only the flat plate portion 10, the fin portion 20 and the extending portion 30 need to be connected.

In addition, a connecting portion 40 is arranged between the flat plate portion 10 and each fin portion 20, a transition cavity 401 is arranged in the connecting portion 40, the transition cavity 401 is communicated with the first cavity 101 and the second cavity 201, the connecting portion 40 comprises a first connecting portion 41 and a second connecting portion 42 which are connected with each other, the first connecting portion 41 is provided with a first communicating cavity, the second connecting portion 42 is provided with a second communicating cavity, the transition cavity 401 comprises the first communicating cavity and the second communicating cavity, specifically, the first connecting portion 41 is connected with the flat plate portion 10 and the first communicating cavity is communicated with the first cavity 101, and the second connecting portion 42 is connected with the fin portion 20 and the second communicating cavity is communicated with the second cavity 201. A bending included angle (not shown) is formed between the first connecting portion 41 and the second connecting portion 42, and a bending line (not shown) is formed between the first connecting portion 41 and the second connecting portion 42. By providing the connecting portion 40, the fin portion 20 can be conveniently bent, that is, only the connecting portion 40 needs to be bent, so that an included angle can be formed between the fin portion 20 and the flat plate portion 10, and meanwhile, the bent included angle is the same as the included angle α between the flat plate portion 10 and the fin portion 20, that is, the connecting portion 40 is bent, so that the included angle α is formed between the flat plate portion 10 and the fin portion 20.

In this embodiment, the first connecting portion 41 is an isosceles right triangle, the second connecting portion 42 is a right trapezoid, an included angle between a long side of the right trapezoid and one of the waists is 45 °, and the other waist (i.e., the right waist) of the right trapezoid and one right-angle side of the isosceles right triangle are formed by the bending line. Specifically, the hatched portion of the broken line in fig. 2 is the first connection portion 41, and the hatched portion of the broken line in fig. 4 is the second connection portion 42.

In addition, the closed cavity further comprises a transition cavity 401, and the transition cavity 401 is processed by adopting a blowing process. In order to form the transition cavity 401 conveniently, the height h of the transition cavity 401 is 0.3-2mm, the width w of the transition cavity 401 is 2-20mm, and w > 3h is satisfied. Preferably, in the present embodiment, h is 0.75mm, and w is 4 mm. The bending radius of the connecting portion 40 is r, and when 5mm < r < 10mm, h is (0.1-0.15) × r or h is 0.3mm, the larger of h and r; when r is less than 30mm, h is (0.05-0.1) r. In addition, the width of the transition cavity 401 on the connecting part 40 from the edge of the connecting part 40 is not less than 5 mm.

It is understood that in other embodiments, not shown, the connecting portion 40 may be omitted, and in this case, the fin portion 20 is directly connected to the flat plate portion 10, and in this case, the closed cavity is formed by the first cavity 101, the second cavity 201, and the third cavity 301.

The closed cavity is internally provided with a negative pressure state, so that the boiling point of the liquid phase change working medium in the negative pressure state is reduced, the phase change working medium is heated and then quickly evaporated, and heat is transmitted to the fin part 20 in time to dissipate heat. It is understood that the phase change working fluid includes, but is not limited to, water, alcohol, and propanol. In addition, because the closed cavity is an integral communicating channel, the phase-change working medium does not need to be filled into the first cavity 101, the second cavity 201 and the third cavity 301 respectively, and only needs to be filled once, so that the filling efficiency is improved, and the filling cost is saved. In addition, in a non-heat dissipation working state, the liquid level of the phase change working medium is lower than the upper edge of the first cavity 101.

During operation, when the phase change working medium in the third cavity 301 is heated, the phase change working medium is rapidly heated and vaporized, the whole closed cavity is filled with the gaseous phase change working medium under the action of thermal diffusion, after the fin portion 20 is cooled, heat in the gaseous phase change working medium is dissipated outwards through the fin portion 20, the gaseous phase change working medium is cooled and liquefied, the liquid phase change working medium flows back into the third cavity 301 through the first cavity 101, and the cycle is repeated, so that heat of the heat source 1 is continuously conducted.

In addition, the extension part 30 can be bent once or for multiple times and then contacted with the heat source 1, so that the problem that the heat pipe cannot be contacted with the heat source 1 due to the limitation of the installation space and further cannot radiate the heat of the heat source 1 is solved. Further, the length and the width of the extending portion 30 may be flexibly set according to specific installation requirements, and meanwhile, in other embodiments not shown, the extending portion 30 may also be not located on the same horizontal plane with the flat plate portion 10, for example, the extending portion 30 is connected with the upper end surface or the lower end surface of the flat plate portion 10, only the extending portion 30 is connected with the flat plate portion 10, and the first cavity 101 is communicated with the third cavity 301.

It is understood that in other embodiments, not shown, the extension portion 30 may be bent according to the specific use requirement of the user, such that the flat plate portion 10 is mounted on a box body for accommodating the heat pipe 1, the fin portion 20 is located outside the box body for dissipating heat, and the extension portion 30 extends into the box body for contacting or matching with the heat source.

In addition, extension 30 and heat source contact, or be close to the heat source, the main effect is directly derive the heat that local hot spot produced fast, realizes the purpose that has the tissue heat dissipation to greatly promote the radiating efficiency.

The utility model provides a board-like heat pipe of extension type, the third cavity 301 on second cavity 210 and the extension 30 on the first cavity 101 on the flat plate portion 10 and the fin portion 20 all communicate, has reduced thermal contact resistance, has promoted the radiating efficiency, in addition, the user can be according to the operation such as bending of concrete installation demand extension 30 to make it and heat source 1 contact, compare in traditional structure, the utility model discloses a problem that receives the installation space restriction and can't install can be overcome to extension type board-like heat pipe, has optimized installation space.

Example two

Referring to fig. 9, a difference of the extended plate heat pipe according to the second embodiment of the present invention compared to the first embodiment is that in the present embodiment, a contact portion 302 is protruded from one end of the extended portion 30 away from the flat plate portion 10, and a width of the contact portion 302 is greater than a width of the extended portion 30, when in use, the heat source 1 contacts the contact portion 302, so as to increase a contact area with the heat source 1, and improve a heat conduction efficiency.

EXAMPLE III

Referring to fig. 10, the extension type plate heat pipe according to the third embodiment of the present invention is different from the first embodiment in that in the present embodiment, the extension portion 30 may further have a plurality of portions, and the third cavity 301 on each extension portion 30 is communicated with the first cavity 101, and when the extension portion 30 is used, the extension portion 30 is in contact with one heat source 1 correspondingly, so that one extension type plate heat pipe can dissipate heat of a plurality of heat sources 1 simultaneously, the number of extension type plate heat pipes is reduced, and the installation space is optimized. In addition, the shape and number of the extensions 30 are not limited. In addition, the extension portions 30 may be bent at different heights so as to extend into the inner side of the case and contact or cooperate with heat sources at different heights. Specifically, the fin portion 20 is bent toward one side of the flat plate portion 10, the extension portion 30 is bent toward the other side of the flat plate portion 10, the flat plate portion 10 is mounted on a box body for accommodating the heat pipe 1, the fin portion 20 is located outside the box body for dissipating heat, and the extension portion 30 extends into the box body so as to be in contact with or fit with a heat source.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An extended plate heat pipe, comprising: the extension type plate heat pipe comprises a flat plate part, an extension part and a plurality of fin parts, wherein the extension part and the fin parts are arranged on the flat plate part, the flat plate part is provided with a first cavity, each fin part is provided with a second cavity, the extension part is provided with a third cavity, and the first cavity, the second cavity and the third cavity are communicated with each other.

2. An extended plate heat pipe as claimed in claim 1, wherein: the flat plate portion, the fin portion and the extension portion are of an integrally formed structure.

3. An extended plate heat pipe as claimed in claim 1, wherein: the extending part and the flat plate part are positioned on the same horizontal plane, or the extending part is connected with the lower end face of the flat plate part.

4. An extended plate heat pipe as claimed in claim 1, wherein: the utility model discloses a fin, including the fin portion, the flat plate portion, connecting portion and the flat plate portion reaches all communicate between the fin portion, connecting portion include first connecting portion and second connecting portion, first connecting portion with be formed with the line of bending between the second connecting portion, first connecting portion are isosceles right triangle, the second connecting portion are right trapezoid, right trapezoid's long limit is 45 with the contained angle between one of them waist, right trapezoid's another waist with a right angle side of isosceles right triangle constitutes by the line of bending.

5. An extended plate heat pipe as claimed in claim 1, wherein: the fin parts are positioned on the same side of the flat plate part and are arranged in parallel, and an included angle alpha is formed between the fin parts and the flat plate part.

6. An extended-type plate heat pipe as claimed in any one of claims 1 to 5, wherein: a plurality of isolated parts are arranged in the first cavity and/or the second cavity, and the isolated parts divide the corresponding first cavity and/or the second cavity into a plurality of fluid channels which are communicated with each other.

7. An extended plate heat pipe as defined in claim 6, wherein: the isolated part is a dot structure or a block structure arranged in the first cavity and/or the second cavity, and the isolated part is formed by attaching the corresponding side walls of the first cavity and/or the second cavity.

8. An extended plate heat pipe as claimed in claim 1, wherein: the extended plate type heat pipe is provided with a closed cavity, the closed cavity comprises a first cavity, a second cavity and a third cavity, and a phase change working medium is filled in the closed cavity.

9. An extended plate heat pipe as claimed in claim 1, wherein: the extension part has a plurality ofly, and a plurality of extension parts bend respectively on different heights.