High-power LED lamp heat dissipation device

Abstract

The invention relates to a high-power LED lamp heat dissipation device, and belongs to the technical field of LED heat dissipation. The high-power LED lamp heat dissipation device comprises an upper lampshade, a circuit board, a heat dissipation fan, a ribbed shell, a gas-liquid pulsating phase change heat pipe, a mounting base, an LED lamp bead integrated board, a lower lampshade and a glass cover plate. The high-power LED lamp heat dissipation device takes the gas-liquid pulsating phase change heat pipe as a core heat transfer component, and heat production of a bottom high-power LED lamp bead array is efficiently transmitted to a three-dimensional space and dissipated quickly; a self-wetting fluid working medium filled in the pipe can automatically moisten the evaporation section of theheat pipe, and the "drying" limit of the heat pipe can be effectively improved; and the capillary suction produced by micro grooves on the inner wall of the heat pipe can further enhance the wettability of the working medium to the inner wall of a whole pipe body, so that the temperature uniformity and heat transfer limit are further improved. Compared with an existing metal ribbed LED lighting and heat dissipation device and traditional heat pipe LED lighting and heat dissipation devices such as capillary heat pipes and gravity heat pipes, the high-power LED lamp heat dissipation device hasbetter heat transfer performance, higher heat transfer limit and better working adaptability.

Description

technical field [0001] The invention belongs to the technical field of LED heat dissipation, and relates to an LED lamp heat dissipation device, in particular to a high-power LED heat dissipation device. Background technique [0002] LED (Light Emitting Diode, Light Emitting Diode) is a high-efficiency electro-optical conversion semiconductor device, which is widely used in various lighting scenarios. Because the luminous flux of a single LED lamp is low, practical high-power LED lamps (such as projection lamps, wall washers, etc.) are usually integrated with a large number of arrayed LED lamp beads to make the luminous flux meet the actual application requirements. It is worth noting that although the electro-optical conversion efficiency of LED is relatively high, most of the electric energy will still be converted into heat energy. If it is not effectively dissipated and cooled, the operating temperature of the LED chip will exceed its safe operating temperature limit (ab...

AI Technical Summary

Problems solved by technology

Therefore, when this type of heat pipe works in the reverse gravity mode (that is, the evaporating section (hot end) is at the upper relative working position, and the condensing section (cold end) is at the lower relative working position), there will be a problem that the reflux of the condensing working medium is blocked, and the heat transfer efficiency It will be greatly reduced or even fail, so that the related heat pipe type LED cooling and heat dissipation device still has technical bottlenecks such as poor work adaptability and inability to work in the direction of gravity, which greatly limits its scope of use.

Furthermore, due to the limitation of the thermal conductivity of the solid metal, the heat transfer performance of the extended heat dissipation surface of the metal fins matched with the heat pipe still needs to be further improved

Images