| 摘要 |
A ventilation device is provided to differ air flow resistance according to the positions of filters, which are mounted to suction surfaces of a heat exchanger, for controlling a flow rate of air sucked into the heat exchanger, thereby making air flow rate distribution uniform over the entire suction surfaces of the heat exchanger and improving heat exchanger efficiency. A ventilation device includes a heat exchanger for carrying out heat transfer between discharged room air and sucked atmospheric air, and suction/discharge filters(60,70) mounted to suction surfaces of the heat exchanger. The filters have first and second filter parts(61,62,71,72) formed with corrugation by different pitches so as to differ air flow resistance according to suction positions, thereby making the flow rate of the air sucked into the heat exchanger uniform. The first filter parts are positioned adjacent to an atmospheric air inlet(15) and a room air inlet(17) respectively and have the corrugation by a small pitch.
|
