Direct cooling type LED (Light Emitting Diode) light source based on heat pipe principle

Abstract

The invention belongs to the field of LED (Light Emitting Diode) illumination and particularly provides a direct cooling type LED light source based on a heat pipe principle, aiming at solving the problems of an existing LED chip that the heat conduction and heat dissipation effects are not good. In order to realize the aim, the direct cooling type LED light source based on the heat pipe principle, provided by the invention, comprises a shell, and an LED chip and a strip-shaped capillary structure wick which are arranged in the shell, wherein the shell comprises a light emitting part and a liquid storage part; a main body of the strip-shaped capillary structure wick is arranged in the light emitting part; the LED chip is arranged nearby the main body of the strip-shaped capillary structure wick or is embedded into a groove or a hole formed in the strip-shaped capillary structure wick; and a liquid-state insulating working medium is stored in the liquid storage part. The strip-shaped capillary structure wick can be used for absorbing the liquid-state insulating working medium, so that the LED chip adjacent to the strip-shaped capillary structure wick can realize direct cooling of the LED chip through the liquid-state insulating working medium absorbed by the strip-shaped capillary structure wick, and furthermore, the service life of the LED light source is greatly prolonged and the light emitting efficiency of the LED light source is greatly improved.

Description

technical field [0001] The invention belongs to the field of LED lighting, and specifically provides a direct-cooling LED light source based on a heat pipe principle for high-power LED chips. Background technique [0002] Since LED became the fourth-generation light source, the LED industry has developed rapidly and gradually occupied the entire lighting field. With the continuous promotion of applications, users have also put forward higher requirements for its performance. Experimental studies have proved that the junction temperature of LEDs has a direct impact on the light decay and life of LEDs. The specific performance is that the higher the junction temperature of LEDs, the lower the luminous efficiency, the greater the light decay, and the shorter the life. According to the Arrhenius law, in a certain temperature range, every time the junction temperature of LED is reduced by 10°C, its life can be extended by 2 times. Therefore, in order to improve the performance of...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of poor heat conduction and heat dissipation effects of the existing LED chips, the present invention provides a direct-cooling LED light source based on the principle of heat pipes. The direct-cooling LED light source includes a casing and at least one LED chip arranged in the casing, the casing includes a light-emitting part and a liquid storage part, the LED chip is arranged in the light-emitting part, and a liquid insulating working fluid is stored in the liquid storage part, It is characterized in that at least one strip-shaped capillary structure liquid-absorbing core is arranged in the shell, and the strip-shaped capillary structure liquid-absorbing core separates at least one cavity in the light-emitting part, and the strip-shaped capillary structure liquid-absorbing core The core can absorb the liquid insulating working fluid in the liquid storage part, so that the LED chip arranged in the light emitting part can realize the vaporization of the liquid insulating working medium absorbed by the strip-shaped capillary structure liquid-absorbing core. cool down

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