TWM637251U - Heat pipe - Google Patents

Abstract

A heat pipe includes a pipe body and at least one capillary structure. At least one capillary structure is arranged on the tube body. Wherein, the thickness of at least one capillary structure is uneven. In this way, different capillary effects can be formed through the difference in thickness, so that the heat pipe can respond to various heat dissipation needs.

Description

Heat pipe

The present invention relates to a heat conduction device, in particular to a heat pipe.

The heat pipe is a hollow metal tube with the characteristics of rapid temperature uniformity. Heat pipes are used in a wide range of applications. They were used in the aerospace field in the early days, and are now widely used in various heat exchangers and coolers.

The heat pipe has a closed chamber containing cooling fluid. Through the cooling cycle of the liquid-vapor two-phase change of the cooling fluid in the closed cavity, the heat pipe exhibits the characteristics of rapid temperature uniformity and achieves the purpose of heat transfer. The actuation mechanism is that the liquid-phase cooling fluid evaporates into a vapor-phase cooling fluid at the evaporating end, and a local high pressure is generated in the cavity, driving the vapor-phase cooling fluid to flow to the condensing end at a high speed, and the vapor-phase cooling fluid condenses into a liquid-phase cooling fluid at the condensing end After that, it flows back to the evaporation end through the capillary structure.

However, due to the increasing processing performance of current computers, the performance of the current heat pipe cannot meet the current demand. Therefore, how to further improve the performance of the heat pipe is one of the problems that the research and development personnel should solve.

The present invention is to provide a heat pipe, so as to further improve the efficiency of the heat pipe.

A heat pipe disclosed in an embodiment of the present invention includes a pipe body and at least one capillary structure. At least one capillary structure is arranged on the tube body. Wherein, the thickness of at least one capillary structure is uneven.

The heat pipe disclosed in another embodiment of the present invention includes a pipe body, at least one first capillary structure and at least one second capillary structure. The pipe body has at least one evaporation section and at least one condensation section. At least one condensation section is connected to at least one evaporation section. At least one first capillary structure is disposed on at least one evaporation section. At least one second capillary structure is disposed in at least one condensation section. Wherein, the mesh number of at least one second capillary structure is different from the mesh number of at least one first capillary structure.

According to the heat pipe of the above embodiment, due to the uneven thickness of the capillary structure of the pipe body, different capillary effects can be formed through the difference in thickness, so that the heat pipe can respond to various heat dissipation requirements.

In addition, since the first capillary structure and the second capillary structure of different thicknesses are compounded in the tube body, the heat pipe can enhance the capillary force and strengthen the return water effect. For example, the first capillary structure made of fine powder can be set in the evaporation section, and the second capillary structure made of coarse powder can be set in the condensation section, so as to take into account the high capillary demand of the evaporation section and the high capillary structure of the condensation section. Backwater demand.

The above description of the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and provide a further explanation of the patent application scope of the present invention.

10, 10A, 10B: heat pipe/flat heat pipe

100, 100A, 100B: tube body

110, 110A, 110B: inner ring surface

120, 120A, 120B: interior space

200, 200A, 200B: capillary structure

210: flat part

220: protruding part

210A: Protrusion

220A: flat part

210B: Outer protrusion

220B: central protrusion

600, 600A: round tube body

610: inner annulus

620: interior space

610A: evaporation section

620A: condensation section

700, 700A: stuffing rod

710: arc surface

720: first section

730: second section

800: metal powder

810: Part I

820: Part Two

800A: the first capillary structure

900A: Second capillary structure

D1, D2: Spacing

L1~L3: Length

S: packing space

FIG. 1 is a schematic cross-sectional view of a heat pipe according to a first embodiment of the present invention.

2 to 9 are schematic diagrams of the manufacturing process of the heat pipe shown in FIG. 1 .

10 and 11 are schematic diagrams of the manufacturing process of the heat pipe according to the second embodiment of the present invention.

FIG. 12 is a schematic cross-sectional view of the heat pipe according to the third embodiment of the present invention.

FIG. 13 is a schematic cross-sectional view of the heat pipe according to the fourth embodiment of the present invention.

See Figure 1. FIG. 1 is a schematic cross-sectional view of a heat pipe 10 according to a first embodiment of the present invention. The heat pipe 10 of this embodiment includes a pipe body 100 and a capillary structure 200 . The material of the pipe body 100 is, for example, copper, aluminum and other metals. The tube body 100 has an inner ring surface 110 , and the inner ring surface 110 surrounds an inner space 120 . The capillary structure 200 is disposed on the tube body 100 . The capillary structure 200 includes two flat parts 210 and a protruding part 220 , the two flat parts 210 are respectively connected to opposite sides of the protruding part 220 , and the height of the protruding part 220 is higher than that of the two flat parts 210 . That is to say, the thickness of the capillary structure 200 is uneven.

See Figures 1 through 9. 2 to 9 are schematic diagrams of the manufacturing process of the heat pipe 10 shown in FIG. 1 . The manufacturing method of the heat pipe 10 includes the following steps. As shown in FIG. 2 and FIG. 3 , a round tube body 600 and a stuffing rod 700 are provided, and the stuffing rod 700 is not inserted into the round tube body 600 . The stuffing rod 700 has an arc surface 710 , two first cut surfaces 720 and a second cut surface 730 . The two second cut planes 720 are, for example, planes, and are respectively connected to opposite sides of the arcuate surface 710 . The second cut plane 730 is, for example, a plane, and opposite sides of the second cut plane 730 are respectively connected to the two first cut planes 720 . Next, as shown in FIG. 4 and FIG. 5 , the stuffing rod 700 is inserted into the round tube body 600 to form a stuffing space S between the round tube body 600 and the stuffing rod 700 . In addition, in the packing space S, the maximum distance D1 between the second cut plane 730 of the stuffing rod 700 and the inner ring surface 610 of the circular tube 600 is greater than that within the first cut plane 720 of the stuffing rod 700 and the inside of the round tube 600 The maximum distance D1 of the annulus 610 .

Next, as shown in FIG. 6 and FIG. 7 , a metal powder 800 is filled into the filling space S, and the metal powder 800 forms a capillary structure 200 in the circular tube 600 . Next, as shown in FIGS. 8 and 9 , the stuffing rod 700 is removed. Next, as shown in FIG. 1 , the oblate tube body 600 is punched to form a flat heat pipe 10 .

The above is an embodiment of filling a single metal powder 800, but it is not limited thereto. In other embodiments, the above step of filling the metal powder into the filling space can also be changed to filling different metal powders, that is Padding for segments. In the following, only the different steps of filling the metal powder 800 will be described, and other steps can be referred to FIG. 2 to FIG. 9 . Please refer to Figure 10 and Figure 11. 10 and 11 are schematic diagrams of the manufacturing process of the heat pipe 10 according to the second embodiment of the present invention. First, as shown in FIG. 10 , a first metal powder is filled in the filling space S, and the first metal powder forms a first capillary structure 800A in the circular tube 600A. Next, as shown in FIG. 11 , a second metal powder is filled in the filling space S, and the second metal powder forms a second capillary structure 900A in the circular tube 600A. The second capillary structure 900A and the first capillary structure 800A are aligned along the extending direction of the circular tube 600A, and the particle size of the second metal powder is smaller than that of the first metal powder, for example. That is, the first capillary structure 800A is made of fine powder, and the second capillary structure 900A is made of coarse powder. For example, the ratio of the median average particle diameter of the first metal powder to the median average particle diameter of the second metal powder is greater than or equal to 40%.

In the initial stage of heat-dissolving, although the capillary action of the first capillary structure 800A made of fine powder is slightly lower than that of the second capillary structure 900A made of coarse powder, as the heat-dissolving process continues, the second capillary structure 900A made of coarse powder The capillary action of the powder will continue to decrease, even lower than the capillary action of the first capillary structure 800A made of fine powder. That is to say, the capillary action of the second capillary structure 900A made of coarse powder is stronger at the beginning, but the capillary action of the first capillary structure 800A made of fine powder is relatively stable. In this way, the first capillary structure 800A made of fine powder can be arranged in the evaporation section 610A, and the second capillary structure 900A made of coarse powder can be arranged in the condensation section 620A, so as to meet the high capillary requirements of the evaporation section 610A , and the high return water demand of the condensing section 620A.

See Figure 11. The heat pipe includes a circular tube body 600A, a first capillary structure 800A and a second capillary structure 900A. The circular tube body 600A has an evaporation section 610A and a condensation section 620A. The condensation section 620A is connected to the evaporation section 610A. The first capillary structure 800A is disposed in the evaporation section 610A. The second capillary structure 900A is disposed in the condensation section 620A. The mesh number of the second capillary structure 900A is, for example, smaller than that of the first capillary structure The mesh number of 800A. In this embodiment, the mesh number of the first capillary structure 800A is, for example, greater than or equal to 100 mesh and less than or equal to 120 mesh. The mesh number of the second capillary structure 900A is, for example, greater than or equal to 60 meshes and less than or equal to 80 meshes. , the heat dissipation of the composite first capillary structure 800A and the second capillary structure 900A is about 60W, which is about 10W (16%) more than the embodiment of the single capillary structure.

In this embodiment, the second capillary structure 900A covers the length L3 of the circular tube 600A, eg, greater than or equal to half of the length L1 of the circular tube 600A, or the length L2 of the first capillary structure 800A, eg, greater than or equal to 10 cm.

In this embodiment, there is one condensing section 620A and one evaporating section 610A, but it is not limited thereto. In other embodiments, the number of condensing sections and evaporating sections can also be changed to multiple.

Please refer to Figure 12 and Figure 13. FIG. 12 is a schematic cross-sectional view of a heat pipe 10A according to a third embodiment of the present invention. FIG. 13 is a schematic cross-sectional view of a heat pipe 10B according to a fourth embodiment of the present invention.

As shown in FIG. 12 , the heat pipe 10A of this embodiment includes a pipe body 100A and a capillary structure 200A. The material of the pipe body 100A is, for example, copper, aluminum and other metals. The tube body 100A has an inner ring surface 110A, and the inner ring surface 110A surrounds an inner space 120A. The capillary structure 200A is disposed on the tube body 100A. The capillary structure 200A includes two protruding portions 210A and a flat portion 220A. The two protruding portions 210A are respectively connected to opposite sides of the flat portion 220A, and the height of the two protruding portions 210A is higher than that of the flat portion 220A. That is, the thickness of the capillary structure 200A is uneven.

As shown in FIG. 12 , the heat pipe 10B of this embodiment includes a pipe body 100B and a capillary structure 200B. The material of the pipe body 100B is, for example, copper, aluminum and other metals. The tube body 100B has an inner ring surface 110B, and the inner ring surface 110B surrounds an inner space 120B. The capillary structure 200B is disposed on the tube body 100B. The capillary structure 200B includes two outer protrusions 210B and a central protrusion 220B. The two outer protrusions 210B are connected to the middle opposite sides of the central protrusion 220B. The outer protruding portion 210B and the central protruding portion 220B respectively have a cross-sectional shape with thinner sides and thicker center. That is, the thickness of the capillary structure 200B is uneven.

According to the heat pipe of the above embodiment, due to the uneven thickness of the capillary structure of the pipe body, different capillary effects can be formed through the difference in thickness, so that the heat pipe can respond to various heat dissipation requirements.

In addition, since the first capillary structure and the second capillary structure of different thicknesses are compounded in the tube body, the heat pipe can enhance the capillary force and strengthen the return water effect. For example, the first capillary structure made of fine powder can be set in the evaporation section, and the second capillary structure made of coarse powder can be set in the condensation section, so as to take into account the high capillary demand of the evaporation section and the high capillary structure of the condensation section. Backwater demand.

Although the present invention is disclosed above with the above-mentioned embodiments, it is not intended to limit the present invention. Any person familiar with similar skills can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this invention The scope of patent protection for new models shall be defined in the scope of patent application attached to this specification.

10: heat pipe / flat heat pipe

100: tube body

110: inner surface

120: Internal space

200: capillary structure

210: flat part

220: protruding part

Claims (9)

A heat pipe comprising: A tube body; at least one capillary structure disposed on the tube body; and wherein the thickness of the at least one capillary structure is uneven. The heat pipe according to claim 1, wherein the at least one capillary structure comprises two flat parts and a protruding part, the two flat parts are respectively connected to opposite sides of the protruding part, and the height of the protruding part is higher than The height of the two flat parts. The heat pipe according to claim 1, wherein the at least one capillary structure includes a flat portion and two protrusions, the two protrusions are respectively connected to opposite sides of the flat portion, and the height of the two protrusions is high at the height of the flat portion. The heat pipe according to claim 1, wherein the at least one capillary structure includes two outer protrusions and a central protrusion, and the two outer protrusions are located on opposite sides of the central protrusion. A heat pipe comprising: A pipe body with at least one evaporating section and at least one condensing section, the at least one condensing section is connected to the at least one evaporating section; at least one first capillary structure is arranged on the at least one evaporating section; and at least one second capillary structure , arranged in the at least one condensation section; wherein, the mesh number of the at least one second capillary structure is different from the mesh number of the at least one first capillary structure. The heat pipe according to claim 5, wherein the mesh number of the at least one second capillary structure is smaller than the mesh number of the at least one first capillary structure. The heat pipe according to claim 6, wherein the mesh number of the at least one first capillary structure is greater than or equal to 100 mesh and less than or equal to 120 mesh, and the mesh number of the at least one second capillary structure is greater than or equal to 60 mesh and less than or equal to 80 mesh head. The heat pipe according to claim 5, wherein the length of the first capillary structure is greater than or equal to 10 cm. The heat pipe according to claim 5, wherein the second capillary structure covers a length greater than or equal to half of the length of the pipe body.

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