Patent ID: 6739831
Filing Date: 2004-05-25
Classification: F04D

Abstract:
A cooling device for a projector, comprising:a light source, providing light to a projector; a second exhaust fan, comprising a second fan hub and a plurality of second fan blades, said second fan hub being installed at a center of the second exhaust fan, the second fan blades being respectively connected to a periphery of the second fan hub, the second fan hub controlling the second fan blades to rotate, exhausting air from the vicinity of the second fan blades inside the projector through the second fan blades to the outside of the projector; and an air duct, extending at least from the light source to the second exhaust fan, exhausting air from the vicinity of the light source through the second fan blades to the outside of the projector; characterized in that, the air duct is in a closed status and is positioned adjacent to a periphery of the light source to concentrate the direction of exhausted air, and the outlet of the air duct is squarely and exclusively aligned with the second fan blades.