Effect of Pin-fin Heat Sink Structure and Irradiation Angle on High-power LED Down-light Thermal Performance

摘要

The heat sink has played an important role in the thermal design of high power LED lamps.In this study,a pin-fin heat sink is designed for the 3-chips high power LED down-light.Thermal performance of pin-fin heat sink is researched by changing the fim height,fim number and lamp's irradiation angle.Simulation results gotten by CFD software show that the pin-fro heat sink has better thermal performance with fin height of 40mm and fin number of 75.The LED down-light with a pin-fin heat sink has a better cooling effect in multi-angle irradiation.The results provide a reference for future design of pin-fin heat-sink.