| 摘要 |
An LED illumination device includes a hollow lamp housing, an optical part having a light source, a circuit board and a heat dissipation part received in the hollow lamp. The optical part and the circuit board are located at front and rear ends of the lamp housing, respectively. The heat dissipation part is located between the optical part and the circuit board, and includes a cylindrical air guider, a heat sink and a cooling fan received in the air guider. The heat sink includes a base and a plurality of fins. The light source is arranged on a heat absorbing surface of the base. The air guider includes an annular ring and a plurality of spaced vanes extending axially from the annular ring. The lamp housing defines a plurality of first and second air holes through a circumferential surface thereof corresponding to the air guider. |
