Zhejiang conquer high-power LED street lamp cooling technology problems

Learned from the Zhejiang provincial science and Technology Department, Zhejiang private enterprises and scientific research institutions, has successfully solved the technical problem of radiation of high power LED lighting, so that the high power LED street lights, tunnel lights and other lighting devices greatly prolong the service life of up to 5 years, the brightness of not less. The breakthrough in the core technology, so that China has a right to speak in the global LED lighting applications terminal market competition. It is understood that, at present, the company has developed a series of LED street lamp products have access to the EU CE, the United States UL, the EU environmental protection RoHS and many other certification, the product has entered the European and American markets.

LED is a semiconductor light-emitting diode for solid-state light emitting device as a light source lighting, because of its high efficiency, low power consumption, low maintenance cost, small size, impact resistance, low heat, ultraviolet radiation and other excellent properties, is internationally recognized as the third generation light source is the most promising. In recent years, all countries in the world in the development of the LED industry, Japan twenty-first Century "light plan", the "next generation lighting plan", the EU's "Rainbow plan", South Korea "GaN semiconductor plan" the government plans to have started. 2009, the national development and Reform Commission, Ministry of science and technology and other six ministries jointly issued the semiconductor lighting industry development advice, and start the "city of ten" pilot project.

According to reports, in the development of the LED industry process, so far upstream of the LED chip technology has matured and stereotypes, cheap LED chip has been able to meet the needs of lighting. But in the application of the terminal market downstream, especially for high power LED lighting device outdoor, widespread poor heat dissipation, short service life, many local LED street just loaded up when the lighting effect is very good, but soon more and more dark, some less than half a year of "dead lights" phenomenon. The reason is that LED is very sensitive to temperature, the higher the junction temperature, the greater the shorter life of light. The outdoor lighting requires high power, light source heat concentration, in the unit area, such as heat is not timely and effective distribution, it will lead to rapid attenuation of LED light effect. Therefore, solving the technical problems of high power LED lighting has become a prerequisite and key factor for the realization of outdoor products industrialization by LED lighting.

It is understood that in 2008, Zhejiang Desheng new energy Polytron Technologies Inc began to heat the core technology research of high power LED devices, they combined University experts, in support of the local science and Technology Department, after more than two years of trial success. According to the company's general manager, member of the project technical research group Wang Hong introduction, high-power LED lighting devices, focusing on multi chip packaging, heat is concentrated in the small size of the chip. The problem of heat dissipation is more serious when multiple LED chips are densely arranged to form a lighting system. According to their thermal management and fluid mechanics, innovation developed a thermal management system of high heat radiating chip and integration ", supporting the production of a heat radiator, fast heat dissipation, greatly prolong the service life, which can reach the high power LED lamp production of 5 years brightness is not decreased. This technology has been a national patent, and in 2011 by the Ministry of science and technology included in the national key new product projects.

Displays the test from the national quality supervision and inspection center of the lamp, the luminous efficiency of high power LED lamp Tecsun company developed the "whole lamp reached 102.8 lumens per watt (102.8Lm/W), 46.8% higher than the national standards, 28.5% higher than the United States access standards. It is understood that the 100W high power LED street lamp is equivalent to about 400W high pressure sodium lamp (second generation light source), in the same brightness, power consumption less than the original 1/4, energy efficiency up to 75%. The breakthrough of this technology can make the high power LED lighting device widely used in street lamps, tunnel lights, garden lights, the great social benefits.