CN202195734U - Heat pipe with unequal cross-section and heat dissipation device including the heat pipe - Google Patents

Abstract

The utility model relates to a heat pipe with unequal cross-sections and a heat dissipation device including the heat pipe. The heat pipe includes an evaporation section and two condensation sections. The evaporation section is located in a part of the heat pipe. The two condensation sections are formed on both sides of the evaporation section. The two condensation sections are interconnected with the inside of the evaporation section. The perimeter size formed by the evaporation section is larger than the perimeter size formed by each condensation section. Thus, the flow speed and heat conduction efficiency of the internal gas can be improved.

Description

Heat pipe with unequal cross-section and heat dissipation device including the heat pipe

technical field

The utility model relates to a heat pipe and a heat dissipation device, in particular to a heat pipe with unequal sections and a heat dissipation device including the heat pipe.

Background technique

Applying Heat Pipe to the heat conduction of heat sources of electronic products can effectively overcome the problem of electronic heat sources with increasing heat. It is obvious that this heat pipe will replace the heat dissipation structure composed of heat sinks in the past, and it has obviously become a future development. trend; however, under the premise that electronic products are light, thin, short and small, the use space and environment of electronic heating sources are limited to a considerable extent, so how to innovate and improve the structure of heat pipes is the design of this utility model problems to be solved by people.

The existing heat pipe mainly includes an isometric pipe body, a capillary tissue and a working fluid, and has a cavity inside the equal diameter pipe body; the capillary tissue is arranged in the cavity and adheres to the inner surface of the tube body ; The working fluid is filled in the cavity and accumulated in the capillary, so as to make a heat pipe.

However, the tube body of the existing heat pipe is of a constant diameter, and when the internal working fluid evaporates into a gas, it cannot be accelerated to carry away the heat, so that its heat conduction performance is restricted to a considerable extent. In addition, because the tube body is of an equal-diameter structure, when it is necessary to bend a specific area of the tube body, it is limited by the ratio of the radius of curvature to the diameter, and a smaller radius of curvature cannot be obtained, resulting in the heat dissipation of the aforementioned heat pipes. The volume of the device is not easy to be miniaturized, but needs to be overcome and improved.

Contents of the invention

An object of the present invention is to provide a heat pipe with unequal cross-sections, which can increase the flow speed of the internal gas and heat conduction efficiency by virtue of the unequal peripheral dimensions of the evaporating section and each condensing section.

In order to achieve the above purpose, the utility model provides a heat pipe with unequal cross-section, which includes:

an evaporation section located in a part of the heat pipe; and

Two condensing sections are respectively formed on both sides of the evaporating section, and the two condensing sections communicate with the interior of the evaporating section, and the size of the periphery surrounded by the evaporating section is larger than that of each condensing section. into the perimeter size.

In the heat pipe with unequal cross-section, the heat pipe is a metal pipe.

The heat pipe with unequal cross-section, wherein, the heat pipe is a circular straight pipe.

The heat pipe with unequal cross-section, wherein, the heat pipe is a flat straight pipe.

In the heat pipe with unequal cross-section, the evaporation section is circular, semicircular or flat.

In the heat pipe with unequal cross-section, each condensation section is circular or flat.

The heat pipe with unequal cross-section further includes a first capillary structure formed inside the evaporating section and each of the condensing sections.

The heat pipe with unequal cross-section further includes a second capillary structure formed inside each condensation section and covering the first capillary structure.

The heat pipe with unequal cross-section further includes a working fluid filled inside the heat pipe.

An object of the present invention is to provide a heat dissipation device, which can increase the flow rate of the gas inside the heat pipe and the heat conduction efficiency, and can obtain a heat pipe with a small curvature radius, so as to reduce the overall volume of the heat dissipation device.

In order to achieve the above object, the utility model provides a cooling device, which includes:

a heat pipe, comprising:

an evaporation section located in a part of the heat pipe; and

Two condensing sections are respectively formed on both sides of the evaporating section and bend and extend from the evaporating section. The two condensing sections communicate with the inside of the evaporating section, and the perimeter of the evaporating section is larger than each a peripheral dimension around which the condensing section is enclosed; and

A cooling fin group is sleeved on any of the condensing sections.

In the heat dissipation device, the heat pipe is a metal pipe.

In the heat dissipation device, the heat pipe is a circular straight pipe.

In the heat dissipation device, the heat pipe is a flat straight pipe.

The heat dissipation device, wherein, the evaporating section is circular, semicircular or flat.

In the heat dissipation device, each of the condensing sections is circular or flat.

In the heat dissipation device, the heat pipe further includes a first capillary structure formed inside the evaporating section and each of the condensing sections.

In the heat dissipation device, the heat pipe further includes a second capillary structure formed inside each condensation section and covering the first capillary structure.

In the heat dissipation device, the heat pipe further includes a working fluid, and the working fluid is filled inside the heat pipe.

The heat dissipation device further includes a heat dissipation fan disposed on one side of the heat dissipation fin group.

The utility model also has the following effects, which rely on each condensation section to be connected to the cooling fin group to achieve the common effect of the cooling fin group. It utilizes the compound capillary structure inside each condensation section to accelerate the return velocity of the liquid to prevent empty burning. Due to the large section of the evaporating section, the area that can be directly attached to the heat source is large and has a large amount of steam, thereby improving the heat dissipation efficiency. Due to the small cross-section of the condensing section, there is no interference with other adjacent electronic components.

Description of drawings

Fig. 1 is the perspective view of the appearance of the metal pipe of the present utility model;

Fig. 2 is the metal pipe of the present utility model and capillary combined sectional view;

Fig. 3 is a 3-3 sectional view of Fig. 2;

Figure 4 is a three-dimensional view of the appearance of the heat pipe of the present invention;

Fig. 5 is a cross-sectional view of the utility model heat pipe combination;

Fig. 6 is an appearance perspective view of another embodiment of the heat pipe of the present invention;

Fig. 7 is a combined sectional view of another embodiment of the heat pipe of the present invention;

Fig. 8 is a sectional view of 8-8 of Fig. 7;

Fig. 9 is a 9-9 sectional view of Fig. 7;

Fig. 10 is an assembly diagram of the heat sink of the present invention;

Fig. 11 is a combination diagram of another embodiment of the heat dissipation device of the present invention;

Fig. 12 is a sectional view of the evaporation section of the heat pipe of the present invention.

Explanation of reference signs: 1, 1'-heat pipe; 101-evaporation section; 102, 103-condensation section; 10-pipe body; 11-hollow cavity; 11a- cavity; 11b- cavity; 12- groove; 13-Protruding strip; 20-First capillary structure; 30-Second capillary structure; 40-Working fluid; 5-Radiation fin group; 6-Cool cooling fan.

Detailed ways

The detailed description and technical content of the present utility model are described below with accompanying drawings, but the attached drawings are only for reference and illustration, and are not intended to limit the present utility model.

Please refer to Fig. 1 to Fig. 5, the utility model provides a kind of heat pipe with unequal cross section, this heat pipe can be a metal pipe, the heat pipe 1 of this embodiment includes a pipe body 10, a first capillary structure 20, A second capillary structure 30 , a working fluid 40 , an evaporation section 101 and two condensation sections 102 , 103 .

The pipe body 10 can be made of materials with good thermal conductivity and ductility such as copper or copper alloy, but it is not limited thereto. The pipe body 10 can be a circular straight pipe with a hollow cavity 11 inside. The inner wall of the pipe body 10 is provided with a plurality of grooves 12 parallel to each other, and a convex line 13 is formed between any two adjacent grooves 12 to form the first capillary structure 20 of the heat pipe of the present invention (as shown in Figure 3 shown).

The middle portion of the tube body 10 can be expanded by means of pipe expansion, so that the diameter of the inner edge of the cavity 11a at the middle portion is larger than the diameter of the inner edge of the cavity 11b at the two sides. Similarly, the two sides of the tube body 10 can also be shrunk by shrinkage processing, so that the diameter of the inner edge of the cavity 11b at the two sides is smaller than that of the cavity 11a in the middle.

Metal powder, braided mesh or fiber bundles can be laid on the inner surface of each cavity 11b during production to form the second capillary structure 30 of the heat pipe of the present invention; at this time, in the cavity 11b of the tube body 10 It has the first capillary structure 20 and the second capillary structure 30 at the same time. Then, one end of the tube body 10 is welded and sealed, and the working fluid 40 is filled from the unsealed end, and degassed and sealed, so as to manufacture the heat pipe 1 of the present invention.

The middle part of the tube body 10 is used to be in thermal contact with the electronic heat source (not shown in the figure) to form the evaporation section 101 of the heat pipe 1; The condensing sections 102 and 103 of the heat pipe 1 are formed by heat conduction of the heat dissipation element (such as a radiating block). It is larger than the size of the circular periphery surrounded by each condensation section 102 (or 103).

Please refer to Figs. 6 to 9, which are heat pipes according to another embodiment of the present invention. The main difference between this heat pipe 1' and the heat pipe 1 of the foregoing embodiment is that the pipe body 10 is a flat straight pipe, and the heat pipe 1' is The flat peripheral dimension surrounded by the evaporation section 101 is also larger than the flat peripheral dimension surrounded by each condensation section 102 (or 103), and inside the evaporation section 101 there are many grooves 12 and most convex The first capillary structure 20 formed by the strip 13, each condensation section 102, 103 has the aforementioned first capillary structure 20 and the second capillary structure 30 composed of metal powder, braided mesh or fiber bundle. It can be clearly seen from FIG. 8 and FIG. 9 that the cross-sectional volume of the cavity 11a is larger than that of the cavity 11b, so that when the working fluid 40 is heated from liquid to gas, the flow of the gas can be accelerated. In addition, since the evaporating section 101 and the condensing section 102 (or 103 ) of the heat pipe 1' are flat, the contact area between the heat pipe 1' and the heat source or radiator is greatly increased, thereby further improving heat dissipation efficiency.

Please refer to Fig. 10, the utility model further provides a heat dissipation device, which includes the aforementioned heat pipe 1', two heat sink groups 5 and two heat dissipation fans 6, wherein the evaporation section 101 of the heat pipe 1' is used to directly Attached to the electronic heat source, each condensing section 102, 103 is horizontally bent and extended from both ends of the evaporating section 101, and each cooling fin group 5 is sleeved on the free end of each condensing section 102, 103. Radiating fans 6 are respectively installed on one side of the cooling fin group 5 to constitute the heat dissipation device of the present utility model; since the outer peripheral dimensions of each condensation section 102, 103 are smaller than the outer peripheral dimension of the evaporation section 101, therefore, except for each condensation section 102, 103 can obtain a smaller radius of curvature during the bending process, so that the overall volume of the heat sink can be greatly reduced, and the contact area between the evaporation section 101 and the heat source is larger, so it can absorb more heat energy To each condensation section 102, 103, it has better heat dissipation efficiency.

Please refer to FIG. 11 , which is another embodiment of a heat dissipation device. The main difference between this heat dissipation device and the aforementioned heat dissipation device is that each condensation section 102, 103 is formed from the two ends of the evaporation section 101 and is perpendicular to the direction of the evaporation section 101. After being bent and extended, it is then bent and extended in a direction parallel to the evaporation section 101, and the cooling fin group 5 provides the condensation sections 102 and 103 to connect; The group 5 and the heat pipe 1' are fixedly connected to each other.

In addition, the heat pipe of the utility model can be in addition to the types of the above-mentioned embodiments, the evaporation section 101 can be circular and the condensation sections 102, 103 are flat; the evaporation section 101 can be flat and the condensation sections 102,103 are then circular; Evaporating section 101 can be semicircular (as shown in Figure 12) and each condensing section 102,103 then is circular; Or evaporating section 101 can be semicircular and each condensing section 102 , 103 are flat.

In summary, the heat pipes with unequal cross-sections of the present invention can indeed achieve the expected purpose of use, and solve the lack of conventional knowledge, and because of its novelty and progress, it fully meets the requirements of the new patent application. Please make a detailed investigation and grant the patent of this case to protect the rights of the designer of the utility model.

Claims (19)

1. the heat pipe with unequal section is characterized in that, comprising:

One evaporator section is positioned at a part of regional of this heat pipe; And

Two condensation segments are respectively formed at the both sides of this evaporator section, and the inside of these two condensation segments and this evaporator section is interconnected, the perimeter dimensions that the perimeter dimensions that this evaporator section is made around is made around greater than each this condensation segment.

2. the heat pipe with unequal section as claimed in claim 1 is characterized in that, this heat pipe is a metal tube.

3. the heat pipe with unequal section as claimed in claim 1 is characterized in that, this heat pipe is a circular straighttube.

4. the heat pipe with unequal section as claimed in claim 1 is characterized in that, this heat pipe is a flat straight tube.

5. the heat pipe with unequal section as claimed in claim 1 is characterized in that, this evaporator section is circle, semicircle or flat.

6. the heat pipe with unequal section as claimed in claim 5 is characterized in that, each this condensation segment is circle or flat.

7. the heat pipe with unequal section as claimed in claim 1 is characterized in that, more comprises one first capillary structure, and this first capillary structure is formed on the inside of this evaporator section and each this condensation segment.

8. the heat pipe with unequal section as claimed in claim 7 is characterized in that, more comprises one second capillary structure, and this second capillary structure is formed on the inside of each this condensation segment and covers this first capillary structure.

9. the heat pipe with unequal section as claimed in claim 8 is characterized in that, more comprises a working fluid, and this working fluid is filled at this inside heat pipe.

10. a heat abstractor is characterized in that, comprising:

One heat pipe comprises:

One evaporator section is positioned at a part of regional of this heat pipe; And

Two condensation segments are respectively formed at the both sides of this evaporator section and this evaporator section bending extension certainly, and the inside of these two condensation segments and this evaporator section is interconnected, the perimeter dimensions that the perimeter dimensions that this evaporator section is made around is made around greater than each this condensation segment; And

One groups of fins is socketed on arbitrary this condensation segment.

11. heat abstractor as claimed in claim 10 is characterized in that, this heat pipe is a metal tube.

12. heat abstractor as claimed in claim 10 is characterized in that, this heat pipe is a circular straighttube.

13. heat abstractor as claimed in claim 10 is characterized in that, this heat pipe is a flat straight tube.

14. heat abstractor as claimed in claim 10 is characterized in that, this evaporator section is circle, semicircle or flat.

15. heat abstractor as claimed in claim 14 is characterized in that, each this condensation segment is circle or flat.

16. heat abstractor as claimed in claim 10 is characterized in that, this heat pipe more comprises one first capillary structure, and this first capillary structure is formed on the inside of this evaporator section and each this condensation segment.

17. heat abstractor as claimed in claim 16 is characterized in that, this heat pipe more comprises one second capillary structure, and this second capillary structure is formed on the inside of each this condensation segment and covers this first capillary structure.

18. heat abstractor as claimed in claim 17 is characterized in that, this heat pipe more comprises a working fluid, and this working fluid is filled at this inside heat pipe.

19. heat abstractor as claimed in claim 10 is characterized in that, more comprises a radiator fan, this radiator fan is provided in a side of this groups of fins.

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