A high-power LED lamp heat sink

Abstract

A heat dissipation device for high-power LED lamps, belonging to the technical field of LED heat dissipation, comprising an upper lampshade, a circuit board, a heat dissipation fan, a finned shell, a gas-liquid pulsation phase change heat pipe, a mounting base, an LED bead integrated board, a lower lampshade, and a glass The device consists of a gas-liquid pulsation phase change heat pipe as the core heat transfer component, which efficiently transmits the heat generated by the high-power LED lamp bead array at the bottom to the three-dimensional space and quickly dissipates it; the self-wetting fluid working fluid filled in the tube It can automatically wet the evaporation section of the heat pipe, which can effectively improve the "dry-out" limit of the heat pipe; the capillary suction force generated by the micro-grooves on the inner wall of the heat pipe can also enhance the wettability of the working medium to the inner wall of the entire pipe, thereby further improving its Uniform temperature and heat transfer limit; compared with existing metal fin LED lighting cooling devices and traditional heat pipe LED lighting cooling devices such as capillary heat pipes and gravity heat pipes, this device has better heat transfer performance, higher Heat transfer limit and better work 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

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