| 摘要 |
PURPOSE:To control vibrations and noises by a method wherein an indoor air circulation fan and an outdoor air introduction fan are arranged below a casing and supported by a base frame. CONSTITUTION:Inside a casing 4, an indoor air circulation fan 14 for supplying air from a vent 10 through an indoor air heat exchanger 5 to an air feeder and an outdoor air introduction fan 15 to introduce air from an outdoor air inlet 12 through an outdoor heat exchanger 6 to an exhaust outlet 13 are installed. These fans 14 and 15 are both arranged downward of the casing 4 and supported by a base frame 1 which is fixed onto a floor not to vibrate. By this, vibrations of the whole device during operation and noises spreading into environment can be prohibited. |
