LED球泡灯的烟囱效应散热设计与实验  

Thermal Design and Experiment of LED Bulb Using Chimney Effect

作　　者：唐帆[1] 郭震宁[1,2] 林介本 廖炫 潘诗发 

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 [2]福建泉州世光智能照明技术研究院有限公司,福建泉州362302

出　　处：《发光学报》2016年第5期624-630,共7页Chinese Journal of Luminescence

基　　金：福建省科技计划引导性重点项目(2016H0022);泉州市科技计划(2015TZ31);华侨大学研究生科研创新能力培育计划(1400201001)资助项目

摘　　要：为了增强LED灯具的散热能力,根据烟囱效应原理,设计了一种LED球泡灯,其具有特殊的直筒式烟囱结构。利用Solidworks建立三维模型,通过其插件Flow Simulation进行热仿真,并以烟囱高度30 mm、烟囱数量6、通风口长度2 mm的参数为基础模型。通过实验验证,测出该模型的最高温度为69℃,与仿真所得出的结果仅相差1.66℃,证实了仿真步骤的正确性。以此为基础,对不同烟囱高度和数量、通风口大小对LED芯片最高温度的影响进行研究。研究表明:烟囱效应明显增强了灯具的对流散热性能。在烟囱高度为45mm、烟囱数量为12、通风口长度为3.5 mm时,LED芯片的最高温度为61.04℃,比优化前下降了9.62℃。在模型参数相同的条件下,最高温度比不加烟囱结构的LED球泡灯下降了1.9℃,且散热器重量下降了2.55g。在自然对流条件下,所设计的LED球泡灯能很好地满足LED芯片工作要求。In order to enhance the cooling capacity of LED lamps and lanterns,we design a special LED bulb with straight chimney structure based on the principle of the chimney effect. We build a three-dimensional model by adopting Solidworks,and use its plug called Flow Simulation to simulate based on the model with the chimney height of 30 mm,chimney number of 6,and vent length of 2mm. Through experiments,we find the highest temperature of this model is 69 ℃,lower than the simulation result only 1. 66 ℃. It confirms the correctness of the simulation steps. Then,we study the influences of different chimney height,chimney number,and vent length on the highest temperature of LED bulb,respectively. The results show that the chimney effect can effectively improve the convection cooling performance of the LED bulb. When the chimney height is 45 mm,chimney number is12,and vent length is 3. 5 mm,the highest temperature of the LED chip is 61. 04 ℃,which is 9. 62℃ lower compared to the original model. Under the same set of model parameters,the highest temperature of the LED bulb has been reduced by 6. 16 ℃ compared to the one in the model without a chimney structure,and the weight of radiator has also reduced 2. 55 g. In conclusion,the designed LED bulb can better satisfy the working requirements under the nature convection conditions.

关 键 词：直筒式 LED球泡灯 烟囱效应 最高温度 

分 类 号：TN312[电子电信—物理电子学]