| 摘要 |
PURPOSE:To make air circulation and compulsory ventilation simultaneously wherein room inside and outside air is sucked, mixed and fed to a room by a 2-directional suction impeller, a portion thereof is discharged outside the room, and atmospheric air is set in almost the same condition as room air through the temperature and humidity exchange between the air passing through supply passages and the air passing through discharge passages. CONSTITUTION:The supply passages 14 of a ventilation tube 6 are opened so that this opening may face with one fan-suction port 10 of a 2-directional suction impeller 9. Room air (a) is sucked through the other fan-suction port 10', and the atmospheric air (b) taken in the passages 14 is sucked. The air (a) and air (b) are mixed with each other and fed to a room. At the same time, a portion of mixture air (c) is discharged outside the room through the outdoor discharge port 15 of an outdoor discharge passage 20 placed in a fan-discharge passage 11, outdoor discharge passages 17 and an outdoor discharge port 16. Therein, the air (b) passing through the passages 14 is made close to the temperature and humidity of the air (c) passing through the passage 20 through the temperature and humidity exchange therebetween and led to the impeller 9. |
