| 摘要 |
<p>A vacuum toilet system comprises a waste-receiving bowl (2) having an outlet (4), a sewer pipe (7) that can be placed at a pressure that is lower than that in the interior of the waste-receiving bowl, and a discharge valve (6) connected between the sewer pipe and the outlet for controlling passage of material from the waste-receiving bowl to the sewer pipe. The discharge valve (6) comprises a closure member movable by a drive mechanism (36) relative to a valve housing between an open position and a closed position. A sensing device (60) provides a control signal in the event that the drive mechanism is not able to cause the closure member to attain its closed position. A controller (50) is connected to the drive mechanism and responds to a user stimulus (via 58) to move the closure member from its closed position to its open position and subsequently from its open position towards its closed position. The controller responds to a control signal provided by the sensing device by causing the drive mechanism to move the closure member towards its open position and subsequently towards its closed position.</p> |
