| 摘要 |
A vacuum-operated waste disposal toilet system suitable for use on commercial passenger vehicles, in particular railcars, including at least one bowl for receiving waste material and a full-retention waste-holding tank connected to the bowl by a drain line. A vacuum blower connected to the waste tank for creating a vacuum in the drain line. A flush valve assembly is provided in the drain line, and is selectively openable to connect the vacuum in the drain line to the bowl for sucking the waste out of the bowl. A disposable spray ring containing a plurality of holes, selectively coupled to a water source, is wedged between the bowl and a separate lip member for dispensing water onto the interior surface of the bowl. The flush valve assembly includes a vacuum chamber with top and bottom vacuum inlet ports, a piston connected to a valve blade movable vertically within the chamber and a flush solenoid openable to selectively connect a second vacuum to the top and bottom inlet ports. The flush solenoid in the open position opens the valve blade, which in turn opens the flush valve assembly. The assembly is supported by a novel light weight composite base having a triangulated shape. The waste-holding tank contains a plurality compression load cells on the bottom exterior surface of the tank to accurately determine the capacity level of the tank.
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