LED路灯新型热管散热器散热研究

Heat Dissipation Research on New Type Heat Pipe Radiator of LED Street Lamp

LED(light emitting diode)结温过高不仅会使光波波长漂移,还会使发光效率和寿命下降,为此设计了一种热管翅片散热结构,并运用ANSYS Icepak热分析软件对该结构进行了参数化分析设计,得到了LED最高结温小于70℃时的最优结构参数。同时建立了翅顶为恒温的数学方程,计算验证翅片温度分布,结果显示翅片温度分布相近,散热器整体温度分布均匀,整体温差小于5℃。表明设计的热管翅片散热结构满足大功率LED路灯的使用要求。

Excessive junction temperature of LED （light emitting diode） not only drifts the light wavelength, but also decreases luminous efficiency and lifetime. A heat pipe cooling fin structure was designed by thermal analysis software ANSYS Icepak to analyze the structure, and the optimal structure parameters were obtained when maximum junction temperature of LED was less than 70℃. In addition, the thermostat mathematical equation of a winged top was established to verify the fin temperature distribution. The results show that the temperature distribution of the fin is similar, and the overall temperature distribution of radiator is uniform. It is found that the overall temperature difference is less than 5℃. It indicates that the heat dissipation structure is satisfied the use requirements of high-power LED street lamp.