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A surface energy gradient bionic liquid-absorbing core and its application

A liquid-absorbing core, the next bionic technology, applied in the direction of lighting and heating equipment, indirect heat exchangers, etc., can solve the problems of insufficient capillary suction, back heat conduction, etc., to solve the problem of insufficient capillary suction and reduce flow Effect of resistance, good engineering application significance

Active Publication Date: 2021-07-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a surface energy gradient bionic liquid-absorbent core and its application, and solve the problems of insufficient capillary suction and back heat conduction in the above-mentioned background technology

Method used

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  • A surface energy gradient bionic liquid-absorbing core and its application
  • A surface energy gradient bionic liquid-absorbing core and its application
  • A surface energy gradient bionic liquid-absorbing core and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of surface energy gradient bionic liquid-absorbent core 1 of the present embodiment, such as figure 1 and 2 , including several bionic units 2 arranged in a three-dimensional array.

[0031] The bionic unit 2 is provided with diversion grooves, such as image 3 , the projection of the diversion groove is a half ellipse, such as Figure 4 The diversion groove includes a slope 4, a curved surface 5 and a flange 6. The slope 4 has a structure in which the depth of the groove gradually increases along the liquid flow direction 3-1. The end of the slope 4 is connected to a curved surface 5. The curved surface 5 The side close to the slope 4 is a concave surface, and the upper end of the curved surface 5 stretches back toward the slope 4 to form the flange 6, and the flange 6 smoothly connects with the slope 4 of the next bionic unit 2 to form a sharp angle.

[0032] In this embodiment, the junction of the curved surface 5 and the inclined surface 4 is a rounded cor...

Embodiment 2

[0039] In this embodiment, the surface energy gradient bionic liquid-absorbing core 1 in Embodiment 1 is applied to a loop heat pipe evaporator, and the loop heat pipe evaporator includes an evaporator shell 12, a liquid compensation chamber 13, a liquid inlet 14, a heating Rod 15, steam groove 16 and steam outlet 17, such as Figure 7 shown. During operation, the liquid near the steam groove 16 in the liquid-absorbing core 1 absorbs the latent heat of vaporization of the heating rod, and the generated steam carries a large amount of heat through the steam groove 16, flows out from the steam outlet 17, and reaches the condenser through the steam pipe. The vapor is liquefied after releasing the latent heat of vaporization in the condenser, and is stored in the liquid compensation chamber 13 after reaching the liquid inlet 14 through the liquid connecting pipe. Under the action of the capillary suction force of the liquid-absorbing core 1, the liquid travels from the liquid com...

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Abstract

The invention discloses a surface energy gradient bionic liquid-absorbing core and its application. The surface energy gradient bionic liquid-absorbing core includes several bionic units arranged in a three-dimensional array, and a diversion groove is set on the bionic unit, and the diversion groove The projection is a half ellipse, including a slope, a curved surface and a flange. The slope has a structure in which the depth of the tank gradually increases along the liquid flow direction. The end of the slope is connected with a curved surface, and the curved surface is concave on the side close to the slope. , the upper end of the curved surface stretches back toward the slope to form the flange, and the flange smoothly connects with the slope of the next bionic unit; the bionic unit imitates the microstructure characteristics of the surface of Nepenthes, and the surface energy gradient biomimetic absorbs liquid The core is used in phase change heat dissipation devices such as loop heat pipes, which can not only improve the capillary suction force of the liquid-absorbing core, but also ensure the directional transmission of the liquid, effectively solving the problems of insufficient capillary suction force and back heat conduction of the loop heat pipe. It has good engineering application significance.

Description

technical field [0001] The invention relates to a surface energy gradient bionic liquid-absorbing core and its application. Background technique [0002] With the development of microelectronics technology, the frequency and integration of electronic chips are getting higher and higher, and the power consumption per unit area has increased sharply, resulting in an increase in heat flux density. For example, the heat flux density of LED lamp beads has reached 100W / cm 2 ;The heat flux density of CPU is generally 60~100W / cm 2 , even up to 200W / cm 2 . When the heat flux of the electronic chip exceeds 0.08W / cm 2 At this time, natural heat dissipation can no longer meet its heat dissipation requirements; the heat flux density exceeds 0.3W / cm 2 , the forced convection cooling has reached its limit. The thermal control of high heat flux chips has become a bottleneck restricting the development of microelectronic chip technology. The improvement of reliability of electronic com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D15/04
CPCF28D15/046
Inventor 周伟凌伟淞刘成忠黄家乐刘瑞亮
Owner XIAMEN UNIV
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