Heat pipe capable of being bent at will

Abstract

The utility model provides a heat pipe capable of being bent at will. The heat pipe comprises an evaporation section, a flexible heat insulation section and a condensation section. The utility model has the advantages that the flexible heat insulation section adopts a metal corrugated pipe structure and can be bent at any angle, and the evaporation section can also be subjected to large-amplitude floating adjustment; the flexible heat insulation section is of a metal corrugated pipe structure, a groove type wick is machined on the inner wall of the flexible heat insulation section, and a groove does not deform along with bending of the flexible heat insulation section, so that deformation of the wick and a working medium flow channel is avoided, fluid flowing is not hindered, and the heat transfer performance of the heat pipe is not affected.

Description

Technical Field

[0001] The utility model relates to a heat pipe, in particular to a heat pipe that can be bent arbitrarily. Background Art

[0002] In the common scenario of temperature equalization in communication base stations, multiple chips share a temperature equalization substrate. However, there is a problem of height difference (inconsistent height) in the package structures of different chips, which causes a height drop between each heat source. When the evaporation section of each heat pipe in the heat dissipation module contacting the heat source is lapped or combined with the radiator, a height difference will be formed. However, this combination with height difference will result in low heat transfer efficiency or ineffectiveness of the heat pipe.

[0003] When there is a need to adjust the height difference between the evaporation section and the condensation section due to height difference requirements, due to the characteristics of the metal material, if the adiabatic section is bent or flexed to meet the height difference requirements, the bridging force that causes the two sides of the evaporation section and the condensation section of the heat pipe to pull each other will cause the adiabatic section (transmission section) to be squeezed inward or pulled outward and deformed, thereby resulting in poor heat dissipation efficiency of the heat pipe or even failure.

[0004] In response to this problem, Patent 202110505819.3 proposes a floating heat dissipation unit, which includes: an upper plate; and a lower plate, which is covered with the upper plate and jointly defines a cavity filled with a working fluid. The upper plate and the lower plate each have a front section, a rear section, and a middle section located between the front section and the rear section. The plate thickness of the front section and the rear section of the upper plate and / or the lower plate is greater than the plate thickness of the middle section, so that the middle section forms a floating flexure section that can be adjusted floatingly. This method realizes floating adjustment by adjusting the plate thickness of the middle section, but this method can only perform micro-floating adjustment, that is, it is required that the height difference between different heat sources cannot be too large.

[0005] In addition, research shows that the performance of the heat pipe in terms of thermal resistance mainly depends on the bending angle. When the bending angle increases, the thermal resistance of the heat pipe increases and the heat transfer efficiency of the heat pipe decreases. When the bending angle of the heat pipe increases from 30° to 90°, the thermal resistance increases by more than 60%. The reason is that the bending of the heat pipe exacerbates the deformation of the wick and the working fluid flow channel, further hindering the fluid flow and thus affecting the heat transfer performance of the heat pipe.

[0006] Therefore, how to develop a heat pipe that can be bent arbitrarily without increasing the thermal resistance of the heat pipe is an urgent problem to be solved. Summary of the Invention

[0007] In view of this, in order to overcome the problems that the current heat pipe cannot perform large-scale floating and the thermal resistance increases greatly when bent, the utility model proposes a heat pipe that can be bent arbitrarily.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] A heat pipe that can be bent arbitrarily includes: an evaporation section located at one end of the heat pipe, and the capillary wick of this section can adopt a grooved type, powder sintering, wire mesh or composite wick; a condensation section located at the other end of the heat pipe, and the capillary wick of this section can adopt a grooved type, powder sintering, wire mesh or composite wick; a flexible adiabatic section located between the evaporation section and the condensation section, and the capillary wick of this section adopts a grooved wick.

[0010] Furthermore, for the flexible adiabatic section, the material can be selected from one of titanium, aluminum, copper, nickel, stainless steel, carbon steel or inconel alloy.

[0011] Furthermore, the flexible adiabatic section has a metal bellows shape, and grooves with pre-planned width and depth are machined on its inner wall to form a grooved wick.

[0012] Furthermore, for the flexible adiabatic section, the grooved wicks on its inner wall are closely attached to the capillary wick structures of the evaporation section and the condensation section respectively, which can ensure that the working fluid in the heat pipe flows back from the condensation section to the evaporation section along the capillary wick by the action of capillary force.

[0013] The beneficial effects of the present utility model adopting the above technical solution are as follows:

[0014] (1) The flexible adiabatic section adopts a metal bellows structure and can be bent at any angle, and the evaporation section can also be adjusted greatly in a floating manner;

[0015] (2) The flexible adiabatic section adopts a metal bellows structure, and its inner wall is machined with a grooved wick. The grooves do not deform with the bending of the flexible adiabatic section, so it will not cause deformation of the wick and the working fluid flow channel, and thus will not hinder fluid flow and affect the heat transfer performance of the heat pipe. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a heat pipe that can be bent arbitrarily proposed by the present utility model.

[0017] Among them, 1 is the evaporation section, 2 is the flexible adiabatic section, 3 is the condensation section, 11 is the capillary wick of the evaporation section, 21 is the capillary wick of the flexible adiabatic section, and 31 is the capillary wick of the condensation section. Detailed Embodiment

[0018] Next, the present utility model will be further described in conjunction with the drawings and specific embodiments.

[0019] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] A heat pipe that can be arbitrarily bent includes: an evaporation section 1 located at one end of the heat pipe, and the capillary wick 11 of this section adopts a grooved wick; a condensation section 3 located at the other end of the heat pipe, and the capillary wick 31 of this section adopts a grooved wick; a flexible adiabatic section 2 located between the evaporation section 1 and the condensation section 3, and the capillary wick 21 of this section adopts a grooved wick.

[0021] Furthermore, for the flexible adiabatic section 2, the material is selected as stainless steel.

[0022] Furthermore, the flexible adiabatic section 2 has the shape of a metal bellows, and its inner wall is processed with grooves of pre-planned width and depth to form a grooved wick.

[0023] Furthermore, for the flexible adiabatic section 2, the grooved capillary wick 21 on its inner wall is closely attached to the grooved capillary wicks 11 and 31 of the evaporation section and the condensation section respectively, ensuring that the working fluid in the heat pipe relies on the capillary force to flow back from the condensation section through the flexible adiabatic section to the evaporation section along the capillary wick.

[0024] The above are only the preferred embodiments of the present utility model creation, and are not used to limit the present utility model creation. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present utility model creation shall be included within the protection scope of the present utility model creation.

Claims

1. A heat pipe that can be bent arbitrarily, characterized in that: It comprises an evaporation section, which is located at one end of the heat pipe, and the capillary wick of this section can adopt a groove type, powder sintering, wire mesh or composite liquid absorbent wick; a condensation section, which is located at the other end of the heat pipe, and the capillary wick of this section can adopt a groove type, powder sintering, wire mesh or composite liquid absorbent wick; and a flexible insulation section, which is located between the evaporation section and the condensation section, and the capillary wick of this section adopts a groove type liquid absorbent wick.

2. The heat pipe that can be bent arbitrarily according to claim 1, characterized in that: The flexible insulation section may be made of a material selected from titanium, aluminum, copper, nickel, stainless steel, carbon steel or Inconel alloy.

3. The heat pipe that can be bent arbitrarily according to claim 1, characterized in that: The flexible heat-insulating section is in the shape of a metal bellows, and its inner wall is processed with grooves of pre-planned width and depth to form a grooved liquid-absorbing core.

4. The arbitrarily bendable heat pipe according to claim 1, characterized in that: The grooved capillary wick on the inner wall of the flexible insulation section is closely fitted with the capillary wick structures of the evaporation section and the condensation section, respectively, to ensure that the working fluid in the heat pipe flows back from the condensation section through the flexible insulation section to the evaporation section along the capillary wick by the action of capillary force.

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