基于热管的汽车LED大灯散热模块设计

Design of Automotive LED Headlight Heat-Dissipating Module Based on Heat Pipe

在狭小密闭的空间中,快速而高效的散热是汽车LED大灯发展的关键技术之一,也是汽车设计制造过程中关注的热点与难点。提出了一种基于热管的汽车LED大灯散热模组。通过SolidWorks软件对该汽车LED大灯散热模组进行模型的建立,并利用SolidWorks软件里面的Flow Simulation插件进行汽车LED大灯的散热仿真与分析。同时利用控制变量法和对比法探究了热管、散热器材料、散热器结构、风扇流量等对散热模组性能的影响。结果表明:热管大大提高了汽车LED大灯散热模组的散热性能;铜质散热器和铝质散热器的散热性能接近,但铝质散热器的重量和成本优于铜质散热器;鳍状部分环切散热器在综合散热性能、重量、成本的情况下为最优解;风扇流量越大,散热性能越好,但过大的风扇流量也会存在成本和噪声的影响。研究表明将热管引入汽车LED大灯的散热模组中是一个很好的探讨方向。

In the confined space,fast and efficient heat dissipation is one of the key technologies for the development of automotive LED headlights,and it is also a hot spot and difficulty in the process of automobile design and manufacturing.A heat dissipation module for automotive LED headlights based on heat pipes is proposed.The thermal module of the automotive LED headlights is modeled by using the SolidWorks software,and the Flow Simulation plug-in in the SolidWorks software is used to simulate and analyze the heat dissipation of the automotive LED headlights.At the same time,the control variable method and the comparison method are used to explore the influence of heat pipe,heat sink material,heat sink structure,fan flow,etc,on the performance of the heat dissipation module.The results show that the heat pipe greatly improves the heat dissipation performance of the automotive LED headlamp heat dissipation module.The heat dissipation performance of copper radiators and aluminum radiators is similar,but the weight and cost of aluminum radiators are better than copper radiators.The fin-like part circumferential radiator is the optimal solution in the case of comprehensive heat dissipation performance,weight and cost.The larger the fan flow,the better the thermal performance,but excessive fan flow can also have cost and noise effects.Studies show that the introduction of heat pipe into the heat dissipation module of automotive LED headlights is a good direction to explore.