System for flushing of a vacuum toilet in an aircraft

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;
• 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;
• 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;
• and
• 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 of the second closing devices can be open.

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;
• 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;
• 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;
• and
• 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 of the second closing devices can be open.

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;
• 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.

A computer-readable storage medium storing instructions causing a processor to operate a drain system for a vacuum toilet for an aircraft including 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, the instructions causing the processor to:

• close the second closing device and opening the first closing device;
• close the first closing device;
• and
• open the second closing device;
• wherein in each case only one of the first and the second closing devices is open.