3D-FIN composite structure heat pipe and manufacturing method thereof

Abstract

The invention discloses a 3D-FIN composite structure heat pipe and a manufacturing method thereof. The 3D-FIN composite structure heat pipe comprises a heat pipe body, and heat dissipation teeth are integrally machined and formed on the outer surface of the heat pipe body. The manufacturing method comprises the following steps: selecting a copper pipe with a certain thickness, namely the heat pipe body; heat dissipation teeth are machined on the surface of the copper pipe in a turning mode; and then sintering, sealing, injecting water, bending and forming according to the conventional manufacturing process of the heat pipe. The heat pipe-fin integrated 3D structure is used, in the heat transmission process, redundant heat is almost not generated due to the direct contact problem of two parts, and more energy saving and environmental protection are achieved. The contact thermal resistance between the heat pipe and the fins / chips can be reduced, and the heat transfer efficiency is improved. As the radiating teeth are distributed on the periphery of the radiating end of the heat pipe, the temperature difference on the surfaces of the radiating teeth is smaller, and the heat exchange efficiency of the radiating end can be effectively improved. The solder-free process can be realized on the premise of not generating extra thermal resistance, so that the energy consumption is effectively reduced, and the process steps are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pipe manufacturing, and more specifically to a 3D-FIN composite structure heat pipe and a manufacturing method thereof. Background Art

[0002] With the increasing demand for heat dissipation performance, the design of reducing thermal resistance has become the direction of common efforts in the industry. Conventional heat dissipation modules weld heat pipes and fins together through reflow soldering to meet the high efficiency of heat transfer. However, because the thermal conductivity of tin is only 60W / (m·K), it is significantly worse than the commonly used metals copper and aluminum. In addition, high-temperature welding is required, which increases energy consumption and carbon dioxide production.

[0003] In order to save energy and reduce emissions, in the traditional heat dissipation module manufacturing process, reflow soldering is usually the way to achieve part assembly. Although there are some "tin-free soldering processes" that can achieve the goal of not using a reflow furnace, due to the use of traditional riveting technology, there is a contact gap between parts and parts, and the overall heat dissipation performance will be reduced by about 10% to 20%. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a 3D-FIN composite structure heat pipe and a manufacturing method thereof.

[0005] The technical solution of the present invention is as follows:

[0006] On one hand, the present invention provides a 3D-FIN composite structure heat pipe, comprising a heat pipe body, wherein the outer surface of the heat pipe body is integrally formed with heat dissipation teeth.

[0007] The heat dissipation teeth are located at the heat dissipation end of the heat pipe body.

[0008] The heat dissipation teeth are in a ring shape and are arranged in an array and sleeved on the outer surface of the heat pipe body.

[0009] The heat dissipation teeth are in a spiral shape and are wound around the outer surface of the heat pipe.

[0010] The heat dissipation teeth are in a rhombus shape and are evenly distributed on the outer surface of the heat pipe body.

[0011] A locking spring is riveted onto the heat pipe body above the heat source, so that the heat pipe is directly attached to the heat generating chip, thereby minimizing the contact thermal resistance.

[0012] The locking spring comprises a plurality of supports, and mounting holes are provided on the supports.

[0013] Another aspect of the present invention provides a method for manufacturing a 3D-FIN composite structure heat pipe, comprising:

[0014] Select a copper tube with a certain thickness, i.e. the heat pipe body;

[0015] Heat dissipation teeth are machined on the surface of the copper tube by turning;

[0016] Then the heat pipe is sintered, sealed, water-filled, and bent and pressed according to the conventional process.

[0017] The heat dissipation teeth are in the shape of a ring, a spiral or a diamond.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The present invention uses a 3D structure of heat pipes and fins. During the heat transfer process, almost no excess heat is generated due to the direct contact between the two parts, which is more energy-saving and environmentally friendly.

[0020] 2. The present invention can reduce the contact thermal resistance between the heat pipe and the fin / chip and improve the heat transfer efficiency.

[0021] 3. Since the heat dissipation teeth are distributed all around the heat dissipation end of the heat pipe, the temperature difference on the surface of the heat dissipation teeth is smaller, which can effectively improve the heat exchange efficiency of the heat dissipation end.

[0022] 4. The "tin-free soldering" process can be realized without generating additional thermal resistance, effectively reducing energy consumption and reducing process steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the position of the locking spring;

[0025] Figure 4 This is a schematic diagram of the spiral heat dissipation teeth in the second embodiment;

[0026] Figure 5 This is a schematic diagram of the diamond-shaped heat dissipation teeth in the third embodiment. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] like Figure 1 and Figure 2 A 3D-FIN composite structure heat pipe shown includes a heat pipe body 1, and the outer surface of the heat pipe body is integrally formed with heat dissipation teeth 2.

[0030] Furthermore, the heat dissipation teeth 2 are located at the heat dissipation end of the heat pipe body.

[0031] Furthermore, the heat dissipation teeth 2 are ring-shaped and arranged in an array so as to be sleeved on the outer surface of the heat pipe.

[0032] Further, such as Figure 3 As shown, a locking spring sheet 3 is riveted on the heat pipe body above the heat source chip 4, so that the heat pipe is directly attached to the heat source chip to minimize the contact thermal resistance.

[0033] The locking spring comprises three supports 31 , each of which is provided with a mounting hole 32 .

[0034] Embodiment 2

[0035] like Figure 4 As shown, the heat dissipation teeth are spirally wound around the outer surface of the heat pipe.

[0036] Embodiment 3

[0037] like Figure 5 As shown, the heat dissipation teeth are rhombus-shaped and evenly distributed on the outer surface of the heat pipe body.

[0038] Embodiment 4

[0039] A method for manufacturing a 3D-FIN composite structure heat pipe, comprising:

[0040] S1. Select a copper tube with a certain thickness;

[0041] S2. Processing heat dissipation teeth on the surface of the copper tube by turning;

[0042] S3, then sintering, sealing, water injection, bending and pressing are carried out according to the conventional process of heat pipe.

[0043] Furthermore, the heat dissipation teeth are annular, spiral or diamond-shaped.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D-FIN composite structure heat pipe, characterized in that: It comprises a heat pipe body, and the outer surface of the heat pipe body is integrally formed with heat dissipation teeth.

2. A 3D-FIN composite structure heat pipe according to claim 1, characterized in that: The heat dissipation teeth are located at the heat dissipation end of the heat pipe body.

3. The 3D-FIN composite structure heat pipe according to claim 1, characterized in that: The heat dissipation teeth are in a ring shape and are arranged in an array and sleeved on the outer surface of the heat pipe body.

4. The 3D-FIN composite structure heat pipe according to claim 1, characterized in that: The heat dissipation teeth are in a spiral shape and are wound around the outer surface of the heat pipe.

5. The 3D-FIN composite structure heat pipe according to claim 1, characterized in that: The heat dissipation teeth are in a rhombus shape and are evenly distributed on the outer surface of the heat pipe body.

6. The 3D-FIN composite structure heat pipe according to claim 1, characterized in that: A locking spring is riveted onto the heat pipe body above the heat source, so that the heat pipe is directly attached to the heat generating chip, thereby minimizing the contact thermal resistance.

7. The 3D-FIN composite structure heat pipe according to claim 6, characterized in that: The locking spring comprises a plurality of supports, and mounting holes are provided on the supports.

8. A method for manufacturing a 3D-FIN composite structure heat pipe, comprising: Select a heat pipe body with a certain thickness; By turning, heat dissipation teeth are machined on the surface of the heat pipe body; Then the heat pipe is sintered, sealed, water-filled, and bent and pressed according to the conventional process.

9. The method for manufacturing a 3D-FIN composite structure heat pipe according to claim 8, characterized in that: The heat dissipation teeth are in the shape of a ring, a spiral or a diamond.

10. The method for manufacturing a 3D-FIN composite structure heat pipe according to claim 8, characterized in that: The heat pipe body is a copper pipe.

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