LED module employing vacuum phase change technology and applicable to LED lighting

Abstract

An LED module employing vacuum phase change technology and applicable to LED lighting is mainly technically characterized in that a radiator is a bottom plate internally provided with a vacuum cavity filled with a cryogenic medium, the vacuum cavity is internally provided with a narrow-tube passage which is a hollow tube surrounding the vacuum cavity, and the peripheral wall of the vacuum cavity is provided with a micro-groove structure, namely corrugated grooves are connected into a groove-line structure. The LED module is in the overall vacuum sealed structure with the surrounding radiating fins, a principle of heat conduction of thermal tubes is generated, heat conduction and heat dissipation is more efficient than that of the thermal tubes, and heat conduction and heat dissipation are improved. The LED module with the special structure has the advantages that the cooling medium can quick gasify at low temperature to allow quick start of heat dissipation; the cooling medium is used with a new cooling medium, gasifying temperature is greatly lowered, heat dissipation speed is increased, and intermediate and marginal thermal gradient is decreased.

Description

technical field [0001] The invention relates to an LED module in the lighting field. Background technique [0002] LED modules are composed of radiators, LED light sources, lenses, sealing components, power supplies, etc. to form a single unit. LED lighting products use one or several modules to make different products. [0003] At present, there are mainly two types of modules used in LED lighting. One is a module that uses a single 1W-3W LED light source. Mature. However, there are disadvantages such as the low power of a single module, and the large size and heavy weight of the lamps when making larger power lighting lamps. [0004] The second is the module made of high-power LED COB light source. Since the manufacture of high-power LED COB light source is developing towards high performance, integration and miniaturization, the power density of its chip can reach hundreds of W / cm2. The electro-optical conversion efficiency of high-power LED is about 30%, and about 70%...

AI Technical Summary

Problems solved by technology

[0005] However, the rise of the LED junction temperature will lead to a decrease in luminous efficiency, a shortened lifespan, a shift in the luminous spectrum, and in severe cases, the chip will be burned. Therefore, heat dissipation is one of the key problems that need to be solved in high-power LED lighting.

[0006] Most of the heat sinks for high-power LED lighting products on the market are made of die-cast aluminum or profiled aluminum. Due to the thermal conductivity and heat dissipation efficiency of the material, they are basically bulky and cost-effective, and they are still not very fast. solve problems well

Ultra-high power radiators (200W-500W) currently have no viable products

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