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针对设计出来的诸多结构样式LED散热器的具体选用问题,提出了一种对比选用方法。以一个LED光源的散热为基准,阐述了对其中3款散热器的选用过程。用Solidworks软件建立光源并采用第一款散热器的模型,用实测结果对用工程流体动力学(EFD)热模拟的结果进行验证。以第一款散热器的热阻和光源基板的均温为散热基准,对另两款散热器在原尺寸的基础上按逐步增加0.1倍的方式进行整体放大,在达到散热基准时对三者进行对比。结果表明,散热基准为热阻15.20 K/W、基板均温42.42℃,款式二、款式三散热器在整体放大1.38倍和1.35倍时与基准最为接近,热阻相差不超过1.5%、均温相差不超过0.1%。此时三者重量相近,款式三的占据空间最小,款式二的可操作面积最大。运用此方法可对各种结构样式的LED散热器进行对比选用。
For the design of many structural styles LED heatsink specific selection problems, put forward a comparison and selection method. Based on the heat dissipation of a LED light source, the selection of 3 heat sinks is described. Solidworks software was used to establish the light source and the first radiator model was used to verify the results of the simulation with engineering fluid dynamics (EFD). Taking the thermal resistance of the first heat sink and the average temperature of the light source substrate as the heat sinking reference, the other two heat sinks are enlarged by a factor of 0.1 times on the basis of the original size, and the three are subjected to the heat sinking criterion Compared. The results show that the thermal resistance is 15.20 K / W and the average substrate temperature is 42.42 ℃. The second and third style radiators are the closest to the reference when the overall magnification is 1.38 times and 1.35 times, and the thermal resistance is no more than 1.5% A difference of not more than 0.1%. At this point the weight of the three similar style three occupy the smallest space, style two of the largest operating area. Use this method to compare the various styles of LED radiator selection.