Improved Gravity Heat Pipe Heat Sink for High Power LEDs

Abstract

The invention discloses an improved gravity assisted heat pipe radiator used for a high-power LED, which comprises an improved gravity assisted heat pipe and radiating fins, and is characterized in that the improved gravity assisted heat pipe consists of a flat-plate-shaped evaporation section and a cylindrical condensation section, wherein the evaporation section is directly connected with an LED circuit baseplate; the condensation section is connected with the radiating fins; a heat conduction column is arranged on the inner wall of the lower end of the evaporation section; a reflux tank channel is axially arranged on the inner wall of the condensation section; the interior of the heat pipe is vaccumized and is filled with a heat-conducting medium; and the inner wall of the heat pipe is sandblasted for heat transfer enhancement. The improved gravity assisted heat pipe radiator used for the high-power LED transmits the heat to the radiating fins rapidly by the circulating convection with the participation of gravity, and has the benefits of flexibility, convenience, simplification, low cost, high start speed, capability of accelerating the radiating rate with the temperature rising of the high-power LED, and the like.

Description

technical field [0001] The invention relates to a heat dissipation device for a high-power heat dissipation device, in particular to the field of high-power LED lighting or other electronic components that require heat dissipation, and in particular to a radiator using an improved gravity heat pipe. Background technique [0002] White LED is considered to be the most valuable new light source in the 21st century. It has the advantages of energy saving, environmental protection, low power consumption, and high brightness. It will be the general trend that white LED lighting will replace traditional lighting and become the main way of human lighting. At present, the manufacture of high-power LEDs is developing towards high performance, integration and miniaturization, and the power density of its chips can reach hundreds of W / cm 2 . The electro-optical conversion efficiency of high-power LED is about 20%, and about 80% of the electric energy is converted into heat, so the hea...

AI Technical Summary

Problems solved by technology

This technology uses a columnar gravity heat pipe, the inner wall is grooved to enhance the fluidity of the liquid, and the condensation section is treated with super-hydrophobic treatment to achieve a high heat transfer coefficient, but it is not conducive to the occasion that requires a large heat dissipation area.

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