冷卻照明用大功率 LED的回路熱管的測試

劉美靜 魯祥友 華澤釗
(上海理工大學動力工程學院 上海 200093)
制冷學報 .-2008，29（5）.－39～43  

    摘 要：LED(Light Emitting Diode，發光二極管)具有節能、壽命長等優點，將成為一種新型固體照明器件，但由于功率大，導致LED芯片結點溫度升高，而直接影響著LED的出光效率、峰值波長、器件壽命等，因此解決LED的散熱成了近年來大功率LED發展照明用的s*要問題。探討了一種用于冷卻照明用大功率LED的平板式回路熱管散熱器。研究表明，在輸入功率從5W增加到20W時，熱管啟動時間從30分鐘降低到10分鐘左右；在輸入功率20W時，模擬LED芯片結點溫度穩定地控制在60℃左右，在輸入功率30W時，熱管熱阻0.48K/W，相對于以往LED金屬散熱體，熱阻下降。

    關鍵詞：熱工學；大功率LED；回路熱管；結點溫度；熱阻

The testing of a loop heat pipe cooling device for high power illumination LED
LIU Mei-jing, LU X Y, HUA Z Z
Shanghai University of Science and Technology, Shanghai, 200093, China

Abstract In this study, a loop heat pipe cooling device for high power lighting LED was developed. The experimental results of the cooling system show that the starting time of the heat pipe decreased from 30minutes to about 10 minutes when the heat input increased from 5W to 20W and the junction temperature of the simulated LED chip was around60℃ steadily for the heat flux of 20W. In addition, the thermal resistance of the heat pipe was only 0.48K/W with the heat flux of 30W.In Chinese.

Keywords Pyrology; High power LED; Loop heat pipe; Junction temperature; Thermal resistance