CN219693952U - Heat pipe - Google Patents

Abstract

The utility model relates to the technical field of heat dissipation, and aims to solve the problem that the heat dissipation power of a single heat pipe is insufficient when the surface area of a heating element is smaller, and provide the heat pipe. The heat pipe comprises a pipe body and a branch pipe. The body includes the cooling surface, and the cooling surface is used for taking away heat with the piece contact that generates heat, and the body still includes first port and the second port of intercommunication, and the cooling surface is connected between first port and second port. The plurality of branch pipes are connected to the first port, the plurality of branch pipes are connected to the second port, and the pipe body is communicated with the plurality of branch pipes to form a plurality of thermal circulation channels. Compared with the prior art, the heat pipe provided by the embodiment of the utility model has the advantages that the first port of the pipe body is connected with the plurality of branch pipes, the second port of the pipe body is connected with the plurality of branch pipes, and the pipe body is communicated with the plurality of branch pipes, so that a plurality of heat circulation channels are formed, the heat dissipation power of the heat pipe is increased, and the effect of improving the efficiency of taking away the heat of the heating element by a single heat pipe is achieved.

Description

Heat pipe

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a heat pipe.

Background

In the prior art, a heat pipe is installed on a heat dissipation plate or directly installed on a heat generation piece to take away heat of a heat source. However, when facing a heat generating element with smaller volume and surface area, the space around the heat generating element is limited, and the space around the heat generating element is insufficient to provide a plurality of heat pipes to sufficiently dissipate heat from the heat generating element, and the heat dissipation power of a single heat pipe is insufficient, so that the heat dissipation requirement of the smaller heat generating element cannot be met.

Disclosure of Invention

The utility model provides a heat pipe to solve the problem that the heat dissipation power of a single heat pipe is insufficient when the surface area of a heating element is smaller.

The embodiment of the utility model provides a heat pipe, which comprises a pipe body and a branch pipe. The pipe body comprises a radiating surface, the radiating surface is used for being in contact with the heating piece to take away heat, the pipe body further comprises a first port and a second port which are communicated, and the radiating surface is connected between the first port and the second port. The plurality of branch pipes are connected to the first ports, the plurality of branch pipes are connected to the second ports, and the pipe body is communicated with the plurality of branch pipes to form a plurality of thermal circulation channels.

Compared with the prior art, the heat pipe provided by the embodiment is characterized in that the first port of the pipe body is connected with the plurality of branch pipes, the second port of the pipe body is connected with the plurality of branch pipes, and the pipe body is communicated with the plurality of branch pipes, so that a plurality of heat circulation channels are formed, the heat dissipation power of the heat pipe is increased, and the efficiency of taking away the heat of the heating element by the single heat pipe is improved.

In one possible embodiment, the four branch pipes are a first branch pipe, a second branch pipe, a third branch pipe and a fourth branch pipe, respectively, the first branch pipe and the second branch pipe are connected to the first port, and the third branch pipe and the fourth branch pipe are connected to the second port.

In one possible embodiment, the first branch pipe includes a first chamfer, the second branch pipe includes a second chamfer, the first chamfer and the second chamfer are bonded and enclose a first round, and the first round is matched with the first port. The third branch pipe comprises a third chamfer surface, the fourth branch pipe comprises a fourth chamfer surface, the third chamfer surface and the fourth chamfer surface are bonded and enclose into a second round port, and the second round port is matched with the second port.

In one possible implementation manner, the diameter of the branch pipe is smaller than that of the pipe body, the first round opening extends towards the inside of the first port of the pipe body and is inserted into the pipe body, and the second round opening extends towards the inside of the second port of the pipe body and is inserted into the pipe body.

In one possible embodiment, the heat pipe further includes a welding layer welded to a junction of the first chamfer and the second chamfer, and the welding layer is welded to a junction of the third chamfer and the fourth chamfer.

In one possible embodiment, the heat pipe further includes a heat sink provided at an end of the branch pipe remote from the pipe body.

In one possible implementation manner, a plurality of cooling fins are arranged at intervals, a through hole is formed in the middle of each cooling fin, and the cooling fins are sequentially connected to the branch pipe through the through holes.

In one possible embodiment, the middle portion of the tube body is flattened into a sheet shape, and the heat dissipating surface is provided at the middle portion.

In one possible embodiment, the surface of the thermal circulation channel has a capillary structure.

In one possible embodiment, the heat pipe further includes a thermal circulation medium, and the thermal circulation medium is accommodated in the thermal circulation channel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a heat pipe according to an embodiment of the utility model;

FIG. 2 is an exploded view of a portion of the components of the heat pipe of FIG. 1;

FIG. 3 is an enlarged partial view of region A of the heat pipe of FIG. 1;

FIG. 4 is a schematic diagram of the heat pipe of FIG. 1;

figure 5 is a cross-sectional view of the heat pipe of figure 4 along line v-v.

Description of main reference numerals:

heat pipe 1

Pipe body 11

Radiating surface 111

First port 112

Second port 113

Intermediate portion 114

Opening 115

Branch pipe 12

First branch pipe 121

First chamfer 1211

Second branch pipe 122

Second chamfer 1221

Third branch pipe 123

Third chamfer 1231

Fourth branch pipe 124

Fourth chamfer 1241

First round mouth 125

Second round opening 126

Thermal circulation channel 13

Capillary structure 131

Thermal circulation path 132

Weld layer 14

Radiating fin 15

Through hole 151

Thermal circulation medium 16

Heating element 2

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the utility model are described in detail below. The following embodiments and features of the embodiments may be combined with each other without collision.

Referring to fig. 1 to 5, the present embodiment provides a heat pipe 1, which includes a pipe body 11 and a branch pipe 12. The pipe body 11 includes a heat dissipation surface 111, the heat dissipation surface 111 is used for contacting with the heating element 2 to take away heat, the pipe body 11 further includes a first port 112 and a second port 113 which are communicated, and the heat dissipation surface 111 is connected between the first port 112 and the second port 113. The plurality of branch pipes 12 are connected to the first port 112, the plurality of branch pipes 12 are connected to the second port 113, and the pipe body 11 communicates with the plurality of branch pipes 12 to form a plurality of thermal circulation passages 13.

According to the heat pipe 1 provided by the embodiment, the plurality of branch pipes 12 are connected to the first port 112 of the pipe body 11, the plurality of branch pipes 12 are connected to the second port 113, and the pipe body 11 is communicated with the plurality of branch pipes 12, so that a plurality of heat circulation channels 13 are formed, the heat dissipation power of the heat pipe 1 is increased, and the efficiency of taking away the heat of the heating element 2 by the heat dissipation surface 111 of the single heat pipe 1 is improved.

Optionally, the tube body 11 may be linear, or may be bent to form a U shape or an arc shape, and the tube body 11 is provided with different shapes to better adapt to the heat generating component 2, so as to improve the heat dissipation efficiency of the heat pipe 1.

The heating element 2 can be a chip, a CPU of a computer and the like, the surface area of the heating element 2 is small, and the surface of the heating element 2 is difficult to be provided with a heat dissipation plate or a plurality of heat pipes 1.

In this embodiment, the heat generating element 2 is attached to the heat dissipating surface 111, and the heat of the heat generating element 2 is transferred to the tube 11 through the heat dissipating surface 111, and the heat is transferred to each branch tube 12 through the tube 11 to dissipate the heat.

Alternatively, the shape of each branch pipe 12 is the same. Each branch pipe 12 is evenly distributed at two ends of the pipe body 11, each branch pipe 12 and the pipe body 11 are hollow and are internally communicated, so that a plurality of heat circulation channels 13 are formed, heat of the pipe body 11 is evenly conducted to each branch pipe 12, and the heat dissipation efficiency of the heat pipe 1 is improved.

Referring to fig. 2, in one embodiment, the branch pipes 12 have four branch pipes 12, which are a first branch pipe 121, a second branch pipe 122, a third branch pipe 123 and a fourth branch pipe 124, respectively, the first branch pipe 121 and the second branch pipe 122 are connected to the first port 112, and the third branch pipe 123 and the fourth branch pipe 124 are connected to the second port 113.

In the present embodiment, the first branch pipe 121 and the second branch pipe 122 diverge from the first port 112 of the pipe body 11 and extend in directions away from each other, so that the first branch pipe 121 and the second branch pipe 122 form a large heat dissipation space at the first end of the pipe body 11; the third branch pipe 123 and the fourth branch pipe 124 branch from the second port 113 of the pipe body 11 and extend in directions away from each other so that the third branch pipe 123 and the fourth branch pipe 124 form a larger heat dissipation space at the second port 113 of the pipe body 11. Thereby being beneficial to the four branch pipes 12 to fully contact with the outside and improving the heat dissipation efficiency of the heat pipe 1.

Referring to fig. 3, in an embodiment, the first branch pipe 121 includes a first chamfer 1211, the second branch pipe 122 includes a second chamfer 1221, and the first chamfer 1211 and the second chamfer 1221 are bonded and enclose a first round opening 125, and the first round opening 125 is matched with the first port 112. The third branch pipe 123 includes a third chamfer 1231, the fourth branch pipe 124 includes a fourth chamfer 1241, and the third chamfer 1231 and the fourth chamfer 1241 are attached to each other and enclose a second round opening 126, and the second round opening 126 is matched with the second port 113.

Alternatively, the branch pipe 12 is a cylinder, the end surface at the opening 115 of the branch pipe 12 is a circular ring shape, and half of the opening 115 is cut in a direction inclined from the normal line of the end surface, so that a first chamfer 1211 is formed at the first branch pipe 121, a second chamfer 1221 is formed at the second branch pipe 122, a third chamfer 1231 is formed at the third branch pipe 123, and a fourth chamfer 1241 is formed at the fourth branch pipe 124. Thus, the first chamfer 1211 and the second chamfer 1221 are advantageously engaged with each other and cooperate to form the first round opening 125, so that the first round opening 125 is better matched with the first port 112 of the tube 11, and the third chamfer 1231 and the fourth chamfer 1241 are engaged with each other and cooperate to form the second round opening 126, so that the second round opening 126 is better matched with the second port 113 of the tube 11. Therefore, the branch pipes 12 are tightly matched with the pipe body 11, which is favorable for forming a closed thermal circulation channel 13 and improving the heat dissipation efficiency of the heat pipe 1.

In one embodiment, the diameter of the branch pipe 12 is smaller than that of the pipe body 11, the first round opening 125 extends towards the first port 112 of the pipe body 11 and is inserted into the pipe body 11, and the second round opening 126 extends towards the second port 113 of the pipe body 11 and is inserted into the pipe body 11.

In this embodiment, the outer diameter of the tube body 11 is 8mm, the wall thickness of the tube body 11 is 1mm, and the inner diameter of the tube body 11 is 6mm; the outer diameter of the branch pipe 12 is 6mm. The diameter of a first round opening 125 formed by the first branch pipe 121 and the second branch pipe 122 is 6mm, and the first round opening 125 is matched with the first port 112 of the pipe body 11; the diameter of the second round opening 126 formed by the cooperation of the third branch pipe 123 and the fourth branch pipe 124 is 6mm, and the second round opening 126 is matched with the second port 113 of the pipe body 11. And the first round openings 125 and the second round openings 126 extend toward the inside of the pipe body 11 to be inserted into the pipe body 11 so that the branch pipes 12 are tightly fitted with the pipe body 11. It will be appreciated that the present embodiment is not limited by the dimensional values of the pipe body 11 and the branch pipe 12, as long as the branch pipe 12 can be tightly fitted with the pipe body 11.

In one embodiment, the heat pipe 1 further includes a welding layer 14, wherein the welding layer 14 is welded at the connection between the first chamfer 1211 and the second chamfer 1221, and the welding layer 14 is welded at the connection between the third chamfer 1231 and the fourth chamfer 1241.

Further, the connection part of the first branch pipe 121 and the second branch pipe 122 is connected in a sealing way by adopting a welding process, and a copper-phosphorus welding rod can be adopted for welding. The first round port 125 is welded with the first port 112 of the pipe body 11 in a sealing manner; the joint of the third branch pipe 123 and the fourth branch pipe 124 is sealed and welded, and the second round port 126 is sealed and welded with the second port 113 of the pipe body 11. Thereby the branch pipe 12 and the pipe body 11 are completely sealed, which is beneficial to forming a sealed thermal circulation channel 13 and improving the heat dissipation efficiency of the heat pipe 1.

Referring to fig. 4, in an embodiment, the heat pipe 1 further includes a heat sink 15, and the heat sink 15 is disposed at an end of the branch pipe 12 away from the pipe body 11.

In the present embodiment, the heat radiating fins 15 are in the form of a plate, and the heat radiating fins 15 are connected to the peripheral surfaces of the branch pipes 12 and extend in a direction away from the branch pipes 12, so that the branch pipes 12 transfer heat to the heat radiating fins 15 to further increase the heat radiating surface 111 and the heat radiating space of the heat pipe 1.

In one embodiment, the heat sinks 15 are plural, the plural heat sinks 15 are arranged at intervals, a through hole 151 is formed in the middle of the heat sink 15, and the plural heat sinks 15 are sequentially connected to the branch pipe 12 through the through hole 151.

Alternatively, the heat sink 15 may be provided with a through hole 151 in the middle, and the branch pipe 12 passes through the through hole 151 and is perpendicular to the surface of the heat sink 15. The heat sink 15 may not have the through holes 151, and the surface of the heat sink 15 may be parallel to the branch pipe 12 and extend along the longitudinal direction of the branch pipe 12, and one end of the heat sink 15 may be connected to the branch pipe 12 and the other end may extend away from the branch pipe 12. The present embodiment is not limited thereto.

In one embodiment, the middle portion 114 of the tube 11 is flattened into a sheet shape, and the heat dissipating surface 111 is disposed on the middle portion 114.

In this embodiment, the tube body 11 is made by flattening a cylindrical tube, and the middle portion 114 of the tube body 11 is flattened to form the flat heat dissipation surface 111, so that the heat dissipation surface 111 is better attached to the heat generating component 2, which is beneficial to improving the heat dissipation efficiency of the heat pipe 1.

Referring to fig. 5, in an embodiment, the surface of the thermal circulation channel 13 has a capillary structure 131. The capillary structure 131 may be attached to the inner surfaces of the tube body 11 and the branch tube 12 by copper powder sintering. The tube body 11 and the branch tube 12 may be directly made of a tubular material having a sintered capillary structure 131, so that the capillary structure 131 of the heat pipe 1 is continuous to form the thermal circulation path 13 after the tube body 11 is connected to the branch tube 12.

In an embodiment, the heat pipe 1 further includes a thermal circulation medium 16, and the thermal circulation medium 16 is accommodated in the thermal circulation channel 13. The heat circulation medium 16 is in a liquid state in a cooling state, and becomes a gaseous state after being heated and warmed, and the heat circulation medium 16 flows in the heat circulation channel 13 to form a heat circulation path 132, thereby circularly taking away the heat of the pipe body 11.

In the initial state, the heating element 2 is at normal temperature, the pipe body 11 is not heated, and the heat circulation medium 16 is liquid and stored in the pipe body 11. In the working state, the temperature of the heating element 2 is increased, the pipe body 11 is heated to heat the heat circulation medium 16 to be in a gaseous state, the volume of the heat circulation medium 16 is increased, and the heat circulation medium diffuses and flows towards the branch pipe 12 to take away heat; the heat circulation medium 16 flows to the end of the branch pipe 12 away from the pipe body 11, the temperature of the heat circulation medium 16 is reduced, and is changed back to a liquid state, and the liquid heat circulation medium 16 is absorbed by the capillary structure 131, so that the heat circulation medium 16 is returned to the pipe body 11 again along the capillary structure 131. And heat is taken away by the reciprocating circulation.

In summary, in the heat pipe 1 provided in this embodiment, the first port 112 of the pipe body 11 is connected to the plurality of branch pipes 12, and the second port 113 is connected to the plurality of branch pipes 12, so that the pipe body 11 is communicated with the plurality of branch pipes 12, and a plurality of heat circulation channels 13 are formed, so that the heat dissipation power of the heat pipe 1 is increased, and the efficiency of taking away the heat of the heat generating component 2 by the heat dissipation surface 111 of the single heat pipe 1 is improved.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. A heat pipe, comprising:

the pipe body comprises a radiating surface, wherein the radiating surface is used for being in contact with a heating piece to take away heat, the pipe body further comprises a first port and a second port which are communicated, and the radiating surface is connected between the first port and the second port;

and the plurality of branch pipes are connected with the first ports, the plurality of branch pipes are connected with the second ports, and the pipe body is communicated with the plurality of branch pipes to form a plurality of thermal circulation channels.

2. A heat pipe as defined in claim 1, wherein:

the branch pipes are four, the four branch pipes are a first branch pipe, a second branch pipe, a third branch pipe and a fourth branch pipe respectively, the first branch pipe and the second branch pipe are connected with the first port, and the third branch pipe and the fourth branch pipe are connected with the second port.

3. A heat pipe as defined in claim 2, wherein:

the first branch pipe comprises a first chamfer surface, the second branch pipe comprises a second chamfer surface, the first chamfer surface and the second chamfer surface are bonded and enclosed into a first round port, and the first round port is matched with the first port;

the third branch pipe comprises a third chamfer surface, the fourth branch pipe comprises a fourth chamfer surface, the third chamfer surface and the fourth chamfer surface are bonded and enclose into a second round port, and the second round port is matched with the second port.

4. A heat pipe as defined in claim 3, wherein:

the diameter of the branch pipe is smaller than that of the pipe body, the first round opening extends towards the inside of the first port of the pipe body and is inserted into the pipe body, and the second round opening extends towards the inside of the second port of the pipe body and is inserted into the pipe body.

5. A heat pipe as defined in claim 3, wherein:

the heat pipe further comprises a welding layer, wherein the welding layer is welded at the joint of the first chamfer surface and the second chamfer surface, and the welding layer is welded at the joint of the third chamfer surface and the fourth chamfer surface.

6. A heat pipe as defined in claim 1, wherein:

the heat pipe also comprises a radiating fin, and the radiating fin is arranged at one end of the branch pipe far away from the pipe body.

7. A heat pipe as defined in claim 6, wherein:

the heat dissipation plates are arranged at intervals, through holes are formed in the middle of the heat dissipation plates, and the heat dissipation plates are sequentially connected to the branch pipes through the through holes.

8. A heat pipe as defined in claim 1, wherein:

the middle part of the pipe body is flattened into a sheet shape, and the heat radiating surface is arranged at the middle part.

9. A heat pipe as defined in claim 1, wherein:

the surface of the thermal circulation channel is provided with a capillary structure.

10. A heat pipe as defined in claim 9, wherein:

the heat pipe also comprises a thermal circulation medium, and the thermal circulation medium is accommodated in the thermal circulation channel.