| 摘要 |
PURPOSE: A LED lamp is provided to improve heat radiation by circulating outside air to the LED lamp. CONSTITUTION: A cooling fan(22) comprises a frame(221), a fan wheel(222) and a radial expansion member(223). The frame accommodates a pan wheel which is rotated by the motor. The radial expansion member is formed the bottom surface of the frame and is extended in axis direction. An air channel(4) is formed between the radial expansion member and an air guide wall(13), and the radial expansion member and an opening part(11). The air guide path(221a) is extended between the radial expansion member and a heat sink(21). |
