Image projection apparatus comprising an air cooling system

摘要

An image projection apparatus (1) includes a light source (61) to emit light for projecting an image to be projected; an intake port (64) to take in low-temperature air into the image projection apparatus; an exhaust port (85) to exhaust air from the image projection apparatus; a ventilation unit (86) to generate an air flow from the intake port (64) to the exhaust port (85); a first flow path for hot-air exhaust having increased its temperature by taking heat from the light source while flowing around the light source; a second flow path for a part of the low-temperature air, taken from the intake port (64), having a temperature lower than the hot-air exhaust; and a mixing unit (98) to mix the hot-air exhaust flowing from the first flow path and the low-temperature air flowing from the second flow path. The air mixed and exhausted from the mixing unit (98) converges with another part of the low-temperature air taken from the intake port (64), flowing from a third flow path set outside the mixing unit (98), at a space between the mixing unit (98) and the exhaust port (85).