中文摘要：

以朗硕LS-QL0X灯具散热器结构为参考模型,研究了石墨散热器替代铝散热器后灯具的散热状况,讨论了石墨散热器翅片长度、翅片角度、翅片厚度及散热器导热系数对LED灯具散热状况的影响,并在此基础上对散热器结构进行了正交优化分析.仿真结果表明,灯具散热影响因素大小的顺序为散热器导热系数＞翅片角度＞翅片长度＞翅片厚度,最优仿真结果是散热器导热系数为50 W/（m·℃）、翅片角度为7°、翅片长度为19 mm、翅片厚度为0.7mm,优化后芯片最高温度为37.52℃,比优化前温度下降了20.6％.优化后的LED石墨散热器灯具的最高温度比铝散热器灯具芯片仅高出2.23℃,质量却比铝散热器减少了25.9％.研究表明优化后的石墨散热器可以满足LED灯具的散热要求,且能有效减轻灯具的整体质量.

英文摘要：

Regarding the structure of LangShuo LS-QLOX lamp radiator as the reference model, the lamps＇radiating situation were studied when the graphite radiator substitutes for the aluminum radiator, and the influence of graphite radiator＇s fin length, fin angle, fin thickness and thermal conductivity on the LED lamps radiating situation, were discussed, on the basis of which the orthogonal optimization analysis of radiator＇s structure was made. The simulation result indicates that the order of the lamp radiator＇s effect factors is the radiator＇s thermal conductivity~fin an- gle~fin length~fin thickness. The optimal simulation result is as follows： the radiator＇s thermal conductivity is 50 W/（m ~ ℃）, its fin angle is 7~, its fin length is 19 mm, its fin thickness is 0. 7 mm, and the highest temperature of the optimized chip is 37.52 ℃ falling by 20. 6% before the optimization. In the meanwhile, the highest temperature of the chip on the optimized graphite radiator in LED lamp is just 2. 23 ℃ higher than the aluminum radiator and the quality of the graphite radiator decreases by 25.9% in comparison with the aluminum radiator, which shows that the graphite radiator can meet the radiating needs of LED lamp and effectively reduce the lamps＇ overall quality.