Patent ID: 9033514
Filing Date: 2015-05-19
Classification: G03B

Abstract:
1. An image projection apparatus comprising: a light source to emit light for projecting an image to be projected; an intake port to take in low-temperature air into the image projection apparatus; an exhaust port to exhaust air from the image projection apparatus; a ventilation unit to generate an air flow from the intake port to the exhaust port; 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, having a temperature lower than the hot-air exhaust; and a mixing unit to mix the hot-air exhaust flowing from the first flow path and the low-temperature air flowing from the second flow path, wherein the air mixed and exhausted from the mixing unit converges with another part of the low-temperature air taken from the intake port, flowing from a third flow path set outside the mixing unit, at a space between the mixing unit and the exhaust port, wherein the mixing unit comprises a plurality of plate members each set parallel to an inflowing direction of the low-temperature air from the second flow path, and wherein the plurality of plate members is disposed in the mixing unit at predetermined intervals in a direction perpendicular to the inflowing direction of the low-temperature air from the second flow path.