| 摘要 |
Double flow (fresh air, extracted air) device permits instantaneous change from double flow to air recycling. The device has at least a recycling ventilator (12) and three over pressure shutters (13, 14, 15). In double flow position, the shutter (15) is closed and the shutters (13, 14) are open, by depression of over pressure. In the recycling position, the shutter (15) is open and the shutters (13,14) are closed by depression or over pressure. The passage from double flow mode to recycling mode is done by stopping the ventilator (10) and starting the ventilator (12). The system includes a heat pump consisting of an evaporator (21) and a condenser (20) which ensures the role of heat recovery in the double flow position and dehumidification in the recycling position. |
