A mechanical control logic actuator for a vacuum toilet includes: a pneumatic valve assembly configured to control an air path of the vacuum toilet and a sewage tank; a vacuum tank configured to provide vacuum compensation for the sewage tank; a first pressure tank configured to provide a power source for the pneumatic valve assembly; a second pressure tank configured to feed gas into the sewage tank; and a sewage pipe configured to discharge sewage in the sewage tank; wherein the first pressure tank controls the air path to be in a circulation state or in a cut-off state through the pneumatic valve assembly, the vacuum tank provides vacuum compensation for the sewage tank, the sewage in the toilet is pumped into the sewage tank, the second pressure tank feeds gas into the sewage tank, the sewage tank is pressurized and the sewage is discharged through the sewage pipe.

A vacuum toilet includes a toilet bowl, a transfer tank with a first tank interior and a flushing water tank with a second tank interior. Flushing water can be conveyed from the flushing water tank into the toilet bowl with the aid of an overpressure that can be applied in the flushing water tank. A suction mass can be drawn from the toilet bowl into the transfer tank with the aid of a vacuum that can be applied in the transfer tank. The transfer tank and the flushing water tank are formed by a container body having a partition wall with a first side and a second side facing away from the first side. The first side delimits the first tank interior of the transfer tank and the second side delimits the second tank interior of the flushing water tank.

A drainage system for a pressure-assisted flush water tank includes a tank main body and a drainage structure. The drainage structure includes an accommodating chamber and a membrane. The accommodating chamber has a drain outlet, a water inlet, and a drainpipe. The membrane partitions the accommodating chamber into a back-pressure chamber and a drainage chamber and is provided with a supplement hole that communicates the back-pressure chamber with the drainage chamber. The drain outlet is communicated with the back-pressure chamber, while the water inlet and the drainpipe are both communicated with the drainage chamber. The tank main body defines therein a storage chamber communicated with the water inlet. The membrane moves toward or departs from the drainpipe as a pressure in the back-pressure chamber varies so as to close or open the drainpipe.

A fluid removal system includes an operative sub-system, such as an ultraviolet (UV) light sanitizing system, that is configured to operate according to an operative cycle, such as a sanitizing cycle, and is configured to output an activation signal during the operative cycle. An actuator is operatively coupled to the operative sub-system and moveably connected to a fluid removal conduit. The fluid removal conduit is closed when the actuator is in a closed position, and opened when the actuator is in an open position. The actuator moves into the open position in response to the operative sub-system outputting the activation signal. Fluid, such as ozone, within a confined space is drawn into the fluid removal conduit when the actuator is in the open position and exhausted through an exhaust port.

Embodiments described herein relate to quick release toilet concepts, which can be useful particularly on-board aircraft and other passenger transport vehicles. Further embodiments relate to improved shroud components for toilets that help reduce splash. Further embodiments also relate to flushing systems for use with vacuum toilets.

The embodiments disclosed herein are directed towards vacuum-assisted toilet systems and methods of using the vacuum-assisted toilet systems. An example vacuum-assisted toilet system includes a toilet bowl defining an outlet and a flush valve fluidly coupled to the outlet. The vacuum-assisted toilet system also includes at least one water source fluidly coupled to the toilet bowl. The water source is configured to supply water to the toilet bowl. The vacuum-assisted toilet system also includes at least one water actuator coupled to the water source. The water actuator is configured to control the amount of water that is supplied by the water source to the toilet bowl. The vacuum-assisted toilet system also includes a controller that is configured to at least partially control the operation of one or more components of the vacuum-assisted toilet system, such as at least one of the flush valve or the water actuator.

A cylinder-piston unit for actuating a flush valve, comprising a piston which is displaceably mounted in a cylinder and the piston rod of which is operatively connected to a flush valve, and comprising at least one fluid inlet, which opens into the cylinder at or below a lower stop position of the piston, and comprising at least one fluid outlet wherein the piston comprises at least one valve which seals the piston in a lower stop position and opens at least one passage opening in an upper stop position.

A combined flushing and filling unit comprising a flush valve and a filling valve, which are situated in an inlet chamber to which line pressure is to be applied, and, between the inlet chamber and a particular outlet line, form a compensation chamber, each of which is closed with the aid of a servo-diaphragm, wherein the inlet chamber communicates with the compensation chambers via a connection opening, in each case, in the servo-diaphragm, and the compensation chambers each have a control opening for generating a pressure decrease, which releases the particular outlet line, in the relevant compensation chamber. Furthermore, a method for the operation of a combined flushing and filling unit comprising a flush valve for triggering an emptying process of a cistern is disclosed.

There are provided a flush water tank apparatus capable of accurately setting the amount of flush water to be discharged while opening a discharge valve by a discharge valve hydraulic drive unit. A flush water tank apparatus includes a valve controller, where, in a case where a first amount of flush water is selected, the valve controller causes the timing control mechanism to be engaged with the discharge valve and causes the timing control mechanism to operate such that engagement is released after a lapse of a first period of time, and in a case where a second amount of flush water is selected, the valve controller causes the timing control mechanism to be engaged with the discharge valve and causes the timing control mechanism to operate such that engagement is released after lapse of a second period of time shorter than the first period of time.

The present invention is a flush water tank apparatus (4) and includes: a storage tank (10) on which a drain port (10a) is formed, a discharge valve (12) opening/closing the drain port; a discharge valve hydraulic drive unit (14) driving the discharge valve using water supply pressure; a clutch mechanism (30) coupling the discharge valve and the discharge valve hydraulic drive unit to pull up the discharge valve; flush water amount selection device capable of selecting between a first and a second amount of flush water; a timing control mechanism controlling a timing of the drain port being blocked; and a control jet unit (20) jetting, when the second amount is selected, flush water to a water receiving surface provided on the timing control mechanism so that a timing of the drain port being blocked is earlier than a case of the first amount of flush water.