| 摘要 |
In the case of malfunction a ventilation valve, the room pressure prevents from being extreme positive pressure or negative pressure. An air volume control system comprises: an air volume balance determination unit (3) for determining an air volume of air supply controlled by an air supply valve and an air volume of general exhaust controlled by a general exhaust valve, so as to correspond the predetermined value to the difference of the air volume of air supply controlled by the air supply valve and the air volume of exhaust controlled by the general exhaust valve; a valve monitoring unit (5) for monitoring the conditions of the air supply valve, the general exhaust valve, and a local exhaust valve; and an air volume change unit (7) for providing the command of the air volume change with respect to the air volume balance determination unit (3). The air volume balance determination unit (3) does not change the air volume of air supply and the air volume of general exhaust, in the case of malfunctioning at least one of the air supply valve and the general exhaust valve, when receiving the command of the air volume change from the air volume change unit (7). |
