Abstract: A new generation of "green" lighting LEDs has been applied in the field of lighting, but high-power LEDs have been blocked in large-scale general lighting applications such as urban street lighting and exterior lighting. breakthrough. This paper introduces the high-power integrated LED chip to solve the heat dissipation problem by using the loop heat pipe radiator, and analyzes and discusses the working principle of its light effect and loop heat pipe radiator.
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In 1942, American Gogler proposed the working principle of heat pipes, but it did not attract people's attention. In 1964, American Grover invented this new type of heat transfer element because of the need for space technology. Since the 1970s, heat pipes have rapidly moved from the laboratory to the practical stage. Today, the Chinese invented a new generation of heat pipes, loop heat pipes, and successfully applied this invention to the field of high-power LED lighting.
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At present, the LED lighting technology is becoming more and more mature, and the high-power LED light effect has reached 80 lm/W or more, which makes the energy-saving renovation of urban street lighting possible. LED street lights, especially high-power LED street lights, are hitting the traditional street lights with the rapid speed of the city as the most advanced lighting technology in the world. Because of its unique high light efficiency, high energy saving and high environmental protection, it effectively avoids The lighting has high energy consumption and short life, and it also responds well to the current global call for energy saving such as low carbon emission reduction. Although LED lighting has been widely used in the field of decoration, display and backlighting, LED lighting has not made breakthroughs in large-scale general lighting applications such as urban street lighting and exterior decorative lighting because the key is blocked in heat dissipation technology. Whether the LED illuminator can work for a long time under the rated junction temperature condition, the brightness will not drop due to overheating, and it is very important to effectively solve the heat dissipation problem.
In terms of heat dissipation, many researchers are currently exploring and finding effective solutions. The advanced loop heat pipe radiator adopts a loop structure, the internal working fluid of the heat pipe is heated and vaporized, and the gas circulates under the pressure difference inside the vacuum chamber. The gas-liquid splitting is realized, which solves the mutual interference problem caused by the gas-liquid mixed flow when the ordinary heat pipe works, and also greatly improves the heat transfer efficiency of the heat pipe. The loop heat pipe radiator keeps the temperature rise of the radiator within 18 °C, so that the LED can run for a long time under the effective junction temperature condition and prolong the service life of the LED.
In 1942, American Gogler proposed the working principle of heat pipes, but it did not attract people's attention. In 1964, American Grover invented this new type of heat transfer element because of the need for space technology. Since the 1970s, heat pipes have rapidly moved from the laboratory to the practical stage. Today, the Chinese invented a new generation of heat pipes, loop heat pipes, and successfully applied this invention to the field of high-power LED lighting.
At present, the LED lighting technology is becoming more and more mature, and the high-power LED light effect has reached 80 lm/W or more, which makes the energy-saving renovation of urban street lighting possible. LED street lights, especially high-power LED street lights, are hitting the traditional street lights with the rapid speed of the city as the most advanced lighting technology in the world. Because of its unique high light efficiency, high energy saving and high environmental protection, it effectively avoids The lighting has high energy consumption and short life, and it also responds well to the current global call for energy saving such as low carbon emission reduction. Although LED lighting has been widely used in the field of decoration, display and backlighting, LED lighting has not made breakthroughs in large-scale general lighting applications such as urban street lighting and exterior decorative lighting because the key is blocked in heat dissipation technology. Whether the LED illuminator can work for a long time under the rated junction temperature condition, the brightness will not drop due to overheating, and it is very important to effectively solve the heat dissipation problem.
In terms of heat dissipation, many researchers are currently exploring and finding effective solutions. The advanced loop heat pipe radiator adopts a loop structure, the internal working fluid of the heat pipe is heated and vaporized, and the gas circulates under the pressure difference inside the vacuum chamber. The gas-liquid splitting is realized, which solves the mutual interference problem caused by the gas-liquid mixed flow when the ordinary heat pipe works, and also greatly improves the heat transfer efficiency of the heat pipe. The loop heat pipe radiator keeps the temperature rise of the radiator within 18 °C, so that the LED can run for a long time under the effective junction temperature condition and prolong the service life of the LED.
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