Patent ID: 8016458

Claim:
An LED illumination device, comprising: a hollow lamp housing; an optical part received in the lamp housing and located at a front end of the lamp housing, the optical part comprising a light source provided with at least one LED; an electrical part provided with a circuit board, the circuit board being received in the lamp housing and located at a rear end of lamp housing, the circuit board electrically connecting with the light source; and a heat dissipation part received in the lamp housing and located between the optical part and the circuit board of the electrical part, the heat dissipation part comprising: a heat sink arranged in the lamp housing and located adjacent to the optical part, the heat sink comprising a solid base and a plurality of fins formed on the solid base; the solid base having a heat absorbing surface at a front side adjacent to the optical part, the light source being arranged on and thermally connected with the heat absorbing surface of the solid base; a cooling fan arranged in the lamp housing and located between the heat sink and the circuit board of the electrical part; and a cylindrical air guider arranged in the lamp housing, the air guider comprising an annular ring and a plurality of spaced vanes extending axially from the annular ring, an air passage being defined between every two adjacent vanes, the heat sink and the cooling fan being received in the air guider, the lamp housing defining a plurality of first air holes and a plurality of second air holes through a circumferential surface thereof corresponding to the air guider for allowing airflow flowing into and out of the lamp housing, an airflow produced by the cooling fan being introduced into the lamp housing via the first air holes and guided into the air guider via the vanes of the air guider, the airflow then flowing towards the heat sink and guided out of the air guider via the vanes of the air guider, and finally the airflow flowing out of the lamp housing via the second air holes.