| 摘要 |
PURPOSE: An LED lighting device prevents the entry of foreign substances inside by blocking the inside from the air by a housing. CONSTITUTION: An LED chip (200) is mounted on one surface of a base. A forced circulation part (300) is installed on the opposite side of the LED chip. The forced circulation part emits air to the base direction. A housing (400) blocks the base, the LED chip, and the forced circulation part from the air. Natural convection cools the heat of a housing surface. |
