| 摘要 |
The invention provides an elevator air pressure control device which enables air pressure (an air pressure difference between the internal and the external of an elevator car) in the elevator to be controlled in high sensitivity. The elevator air pressure control device of the invention is provided with a blower, an air supplying pipe, an exhaust pipe and a branch pipe; an electric on-off valve is disposed on a midway of the air supplying pipe, and the air supplying pipe is used to supply air from the blower to the elevator car; an electric on-off valve is disposed on a midway of the exhaust pipe, and the exhaust pipe is used to exhaust from the elevator car to a blower side; and a flow control valve is disposed on a midway of the branch pipe, and the branch pipe and the air supply pipe are connected or the branch pipe and the exhaust pipe are connected. When air (wind) is supplied to the elevator car, a part of air, which flows into the elevator car via the air supplying pipe, is extracted through the branch pipe and the flow control valve; and when exhaust (suction) from the elevator car is performed, air is injected into air, which flows to the blower side via the exhaust pipe, through the branch pipe and the flow control valve. |
