LED圆筒太阳花散热器设计与实验

发布时间：2019-06-26 18:53

【摘要】：为了提高发光二极管(LED)的散热能力,基于烟囱效应,在传统太阳花散热器外侧加装圆筒壁,形成特殊的烟囱结构。运用Solidworks软件构建三维模型,用其插件Flow Simulation进行热仿真,并以散热器翅片数12个、最大直径70mm、高度40mm为基础模型参数,进行优化研究。研究表明,在翅片数为20个、最大直径为85mm、高度为65mm时,LED圆筒太阳花散热器的散热效果最好。此时,LED的最高温度为48.98℃,比优化前降低了13.05℃。当功率为8,12,16,19W时,LED芯片的最高温度都满足LED工作的安全要求。对功率为8W的LED散热器样品的实验测试结果表明,4个监测点的实际温度与仿真所得温度的平均误差为4.8%,在允许范围内,验证了研究的正确性。在功率为32 W时,配备圆筒太阳花散热器的芯片最高温度仍满足低于125℃的技术要求,并比配备传统太阳花散热器的芯片温度低6.44℃。所设计的LED圆筒太阳花散热器为解决大功率LED散热问题提供了一个新的途径。
[Abstract]:In order to improve the heat dissipation capacity of light emitting diode (LED), a special chimney structure is formed by installing cylinder wall on the outside of traditional sunflower radiator based on chimney effect. The three-dimensional model is constructed by Solidworks software, and the thermal simulation is carried out with its plug-in Flow Simulation, and the optimization research is carried out based on the number of radiator wings, maximum diameter 70mm, height 40mm as the basic model parameters. The results show that when the number of wings is 20, the maximum diameter is 85mm and the height is 65mm, the heat dissipation effect of LED cylinder sunflower radiator is the best. At this time, the maximum temperature of LED is 48.98 鈩，

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