基于热管散热的大功率LED热特性测量与分析

Measurement and analysis on thermal characteristics of high power LED based on heat pipe

提出了一种新型结构的回路热管,建立了回路热管性能测试试验装置。在相同的测试条件下,研究了热负荷、倾角等对回路热管的起动特性和均温特性、热阻等传热性能的影响。试验结果表明,热管散热器的热阻在0.21K/W～2.6K/W之间,且整个散热器具有均匀的温度分布。与当前的LED散热器相比,这种结构的热管散热器具有散热效率高、结构紧凑、加工方便、热阻小、重量轻、成本低等特点,可以满足大功率LED散热的要求。

A loop heat pipe heat sink with new structure is brought forward and a performance testing experiment equipment of loop heat pipe is established.The thermal conductivity including startup performance,temperature uniformity and thermal resistance of loop heat pipe is studied in the different heat load and tilt angles under the same test condition.The obtained results indicate that the thermal resistance of the heat pipe heat sink varies in the range of 0.21 K/W-2.6 K/W and its temperature distribution field is very even.Compared with the conventional LED heat sinks,the heat pipe heat sink has the features of high efficiency of heat dissipation,compact construction,convenient manufacture,low thermal resistance,light weight,low cost,etc.,which meets the demand of heat dissipation for high power LED.