基于烟囱效应的LED太阳花与梳状散热器对比  

Contrast comb radiator and sunflower radiator for LED using chimney effect

作　　者：唐帆[1] 郭震宁[1] 

机构地区：[1]华侨大学信息科学与工程学院福建省光传输与变换重点实验室,福建厦门361021

出　　处：《电子元件与材料》2016年第9期24-28,共5页Electronic Components And Materials

基　　金：福建省科技计划引导性重点项目(No.2016H0022);华侨大学研究生科研创新能力培育计划资助项目(No.1400201001)

摘　　要：为了提高LED的散热性能,基于烟囱效应原理,对比了LED梳状散热器和太阳花散热器的散热效果。通过Solidworks建立实体模型,通过其插件Flow Simulation对建立的模型进行热仿真。在保持散热器质量不变的前提下,研究了不同烟囱高度对配备梳状散热器和太阳花散热器的LED芯片最高温度的影响。并对烟囱高度为40 mm的太阳花散热器进行了实验验证,经实验测量,此时LED芯片的最高温度为81℃,与模拟结果只相差1.28℃,证实了模拟的正确性。仿真表明:在烟囱效应下,LED太阳花散热器的散热效果要强于梳状散热器,并且当烟囱高度大于45 mm时,二者的温度差随着烟囱高度的增加不断扩大。In order to improve the heat dissipation performance of LED, a comparison based on the principle of the chimney effect is made between comb radiator （CR） and sunflower radiator （SR）. An entity model was built by adopting ＇Solidworks＇, and simulated by its plug-in ＇Flow Simulation＇. The influence of the height of the chimneys （HC） on the maximum operating temperature of the LED chip for both CR and SR keeping their mass constant was studied. In the experiment, the highest operating temperature of the LED chip for SR with a HC of 40 mm is 81 ℃ which is only 1.28 ℃ higher than the simulation result, proving the validity of the simulation. The simulation demonstrates that SR has a better performance in heat dissipation than CR, and their maximum operating temperature difference increases with HC when the HC is higher than 45 mm.

关 键 词：散热 散热器 烟囱效应 最高温度 仿真 LED芯片 

分 类 号：TN312[电子电信—物理电子学]