Combined planar heat pipe radiator used for cooling light emitting diode (LED)

Abstract

The invention discloses a combined planar heat pipe radiator used for cooling a light emitting diode (LED) in the technical field of LEDs. The combined planar heat pipe radiator comprises an aluminium plate, a die-casting heat pipe set channel fin cover plate, pulse heat pipe channels and shared channels, wherein each shared channel consists of an internal mesh heat pipe set channel, an external mesh heat pipe set channel, an internal gravity heat pipe set channel and an external gravity heat pipe set channel; the pulse heat pipe channels have an independent sealed annular structure comprising a plurality of bending sections and are uniformly distributed on the inner surface of the whole aluminium plate; and the shared channels are arranged inside the pulse heat pipe channels in a staggered mode. The combined planar heat pipe radiator, as a novel large-power LED cooling method, has the advantages of large radiation area, high radiation efficiency and startup performance, light weight, high temperature uniformity, compact structure and convenient process.

Description

technical field [0001] The invention relates to a device in the technical field of light-emitting diodes, in particular to a combined flat heat pipe radiator for cooling LEDs with power above 100W. Background technique [0002] With the continuous expansion of LED application fields, high-power LEDs gradually show their unique advantages. The high-power LED chip is integrated and packaged on a metal base LED substrate, and an optical cup is arranged on the metal base. This package structure has high light efficiency and easy control of the light angle, but the problem of heat dissipation has not been solved, which has hindered the application of high-power LEDs. The bottleneck problem in the field of lighting. The photoelectric conversion efficiency of the high-power LED packaging structure is about 20%, and about 80% of the electric energy is directly converted into heat energy and emitted. The performance and lifetime of LEDs are inversely proportional to the temperature...

AI Technical Summary

Problems solved by technology

This technology uses the high heat transfer characteristics of the pulsating heat pipe in a steady state to dissipate heat. However, due to the geometrical constraints of the pulsating heat pipe itself, the distance between the tubes is very large, and the space available for the heat pipe on the cooling plate is very small.

At the same time, because the start-up characteristics of the pulsating heat pipe itself are not good, and the maximum heat transfer capacity is not large, it is not suitable for high-power LEDs to use the pulsating heat pipe alone.

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