Abstract: A projector assembly includes a projector casing and an auxiliary device. The projector casing is formed with a mating aperture, and has a first light source for emitting light beams defining an optical path of the projector assembly. The auxiliary device includes a mating part inserted detachably into the mating aperture in the projector casing, a second light source disposed in the mating part for emitting light beams, and a light-beam guiding module disposed in the mating part in front of the second light source so that the light beams emitted from the second light source are guided into the optical path via the light-beam guiding module, thereby enhancing illumination of the optical path of the projector assembly.

Abstract: A device to convey the cool air from an air-conditioner into a computer includes an air-conditioner having an air vent on right side including a plurality of louvers on upper portion, a partition on lower portion, at least a tubular adapter projected outward from the front surface thereof to define an air concentration passage thereinbetween and an exhaust fan secured to the inner surface of the partition, a hose having one end connected with the tubular adapter and the other end connected with an inlet of a radiator inside a computer for conveying the cool air into the radiator to cool off the CPU in the computer by which the CPU will be operated in a predetermined constant temperature.

Abstract: A semi-closed air cooling type radiator includes a rectangular framed main body having four side walls connected on the corners by four cylindrical posts, a plurality of vertical radiation fins spacedly disposed on outer surface of the side walls, a plurality of diagonal partitions spacedly disposed inside the main body each having one end connected to the side wall and the other end being an indenture so as to form an air circulation system therein. A rectangular lid covers the top of the main body having a pair cylindrical tubes on opposing corners respectively communicating to the beginning and the end of the air circulation system, an air circulation set having a first air guiding pipe connected to the beginning and an air flow actuator and a second air guiding pipe connected between the end and an air vent. In an alternate arrangement on air circulation set can serve a series of radiators by increasing an additional air guiding pipe between the adjacent radiators.