System for flushing of a vacuum toilet in an aircraft
View Patent ↗A system for flushing a vacuum toilet, includes a drain that is connected to a drain conduit, which vacuum toilet is connectable to a vacuum system by way of a suction valve. With the use of a combined valve including, for example, a flow-optimised intermediate storage device, inflow nozzle, bypass conduit with silencer and hose odor seal, the flow noises at the urinal bowl drain, urinal bowl overflow and upper end of the bypass conduit can be effectively suppressed. With the combination disc valve or the shut-off valve and suction valve, during the suction process the air stream is only drawn through the bypass conduit with a special odor seal and silencer.
1. A drain system for a vacuum toilet for an aircraft, the drain system comprising:
a drain pipe system;
a first closing device;
and a second closing device;
wherein the drain pipe system is provided with at least a first pipe section and a second pipe section that is connected to the first pipe section by way of a coupling;
wherein a connection of the first pipe section is connectable to a bowl of a vacuum toilet, and a connection of the second pipe section is connectable to a vacuum system by way of the second closing device;
wherein the first closing device is provided in the first pipe section;
wherein the second closing device is provided in the second pipe section downstream of the first closing device;
wherein the first closing device and the second closing device are coupled to each other such that in each instance only one of the first and the second closing devices can be open; and
wherein liquids and any matter to be conveyed are conveyed from a bowl of a vacuum toilet behind the first closing device by way of the first pipe section right up to the second closing device only by way of the force of gravity when the second closing device is closed.
2. The drain system of claim 1 , wherein the drain pipe system comprises a third pipe section that leads between the first closing device and the second closing device into the drain pipe system.
3. The drain system of claim 1 , further comprising a first fill-level measuring device for measuring a fill level between the first closing device and the second closing device.
4. The drain system of claim 1 , further comprising a second fill-level measuring device for measuring a fill level upstream of the first closing device.
5. The drain system of claim 1 , wherein the first closing device and the second closing device are arranged in a housing.
6. The drain system of claim 1 , wherein the first closing device and the second closing device are mechanically coupled.
7. The drain system of claim 1 , wherein the first closing device is a first gate shut-off valve, and the second closing device is a second gate shut-off valve.
8. The drain system of claim 7 , wherein the first and the second gate shut-off valves comprise a shared shut-off plate.
9. The drain system of claim 8 , wherein the shut-off plate is rotatably held and comprises a port opening such that only one gate shut-off valve can be open.
10. The drain system of claim 8 , wherein the shut-off plate is driven by means of a motor.
11. The drain system of claim 1 , further comprising a control device that is designed to control the first closing device and the second closing device based on at least one state from the group of a first fill-level measuring device between the first and the second closing device, a second fill-level measuring device upstream of the first closing device, a user detection sensor, a urine-water-mixture conductivity sensor, an exterior actuation device and a time-control unit.
12. The drain system of claim 1 , wherein the second closing device is a suction valve comprising a pneumatic or electromechanical pinch valve.
13. The drain system of claim 2 , wherein the connection of the third pipe section is connected to at least one device from the group of an odour seal and a silencer.
14. A vacuum toilet comprising a drain system, the drain system comprising:
a drain pipe system;
a first closing device; and
a second closing device;
wherein the drain pipe system is provided with at least a first pipe section and a second pipe section that is connected to the first pipe section by way of a coupling;
wherein a connection of the first pipe section is connectable to a bowl of a vacuum toilet, and a connection of the second pipe section is connectable to a vacuum system by way of the second closing device;
wherein the first closing device is provided in the first pipe section;
wherein the second closing device is provided in the second pipe section downstream of the first closing device;
wherein the first closing device and the second closing device are coupled to each other such that in each instance only one of the first and the second closing devices can be open; and
wherein liquids and any matter to be conveyed are conveyed from a bowl of a vacuum toilet behind the first closing device by way of the first pipe section right up to the second closing device only by way of the force of gravity when the second closing device is closed.
15. The vacuum of claim 14 , wherein the vacuum toilet comprises a vacuum urinal.
16. An aircraft with a toilet or a urinal comprising a drain system, the drain system comprising:
a drain pipe system;
a first closing device; and
a second closing device;
wherein the drain pipe system is provided with at least a first pipe section and a second pipe section that is connected to the first pipe section by way of a coupling;
wherein a connection of the first pipe section is connectable to a bowl of a vacuum toilet, and a connection of the second pipe section is connectable to a vacuum system by way of the second closing device;
wherein the first closing device is provided in the first pipe section;
wherein the second closing device is provided in the second pipe section downstream of the first closing device;
wherein the first closing device and the second closing device are coupled to each other such that in each instance only one of the first and the second closing devices can be open; and
wherein liquids and any matter to be conveyed are conveyed from a bowl of a vacuum toilet behind the first closing device by way of the first pipe section right up to the second closing device only by way of the force of gravity when the second closing device is closed.
17. A method for operating a drain system for a vacuum toilet for an aircraft, comprising:
providing of a first closing device that is provided in a first pipe section of a drain pipe system, and a second closing device that is provided in a second pipe section of the drain pipe system, downstream of the first closing device, wherein a connection of the first pipe section can be connected to a bowl of a vacuum toilet, and a connection of the second pipe section can be connected to a vacuum system by way of the second closing device, wherein the second pipe section is connected to the first pipe section by way of a coupling;
closing the second closing device and opening the first closing device;
closing the first closing device; and
opening the second closing device;
wherein in each case only one of the first and the second closing devices is open; and
wherein liquids and any matter to be conveyed are conveyed from a bowl of a vacuum toilet behind the first closing device by way of the first pipe section right up to the second closing device only by way of the force of gravity when the second closing device is closed.