Patent ID: 7837363

Claim:
An LED illuminating device, comprising: an optical section located at a front end of the LED illuminating device, a light source being provided in the optical section; an electrical section located at a rear end of the LED illuminating device and electrically connecting with the light source; and a heat dissipation section located between the optical section and the electrical section, the heat dissipation section being provided with a heat dissipation device, the heat dissipation device comprising: a heat sink comprising a solid base and a plurality of fins extending radially and outwardly from the base, a blind hole being axially provided in the base, a plurality of air passage holes being radially defined through the base and communicating with the blind hole and an outside of the base, the light source being thermally connected with the base; and a cooling fan provided over the heat sink and configured to generate an airflow through the heat sink, a portion of the airflow flowing through the fins, another portion of the airflow flowing through the blind hole and the air passage holes of the base; wherein the blind hole extends axially from a top portion of the base toward a bottom portion of the base, the air passage holes are defined through the bottom portion of the base, the light source is thermally attached to the bottom portion of the base, and the cooling fan is located above the top portion of the base.