Method and system for managing the grey water in an aircraft

1. A method of removing wastewater contained in a water retention tank of grey-water management system for an aircraft toilet, comprising:

removing the wastewater via a diaphragm pump having an undulating diaphragm,

the diaphragm pump comprising an inlet pipe connected to the retention tank, the diaphragm of the pump actuated by electromagnetic or magnetic actuation so as to remove wastewater present in the retention tank through the inlet pipe of the pump to an outlet pipe of the pump.

2. A grey-water management system for an aircraft toilet, the system comprising a washbasin, a water supply faucet for supplying water to said washbasin, a drain for draining the wastewater from the washbasin, which drain is connected to a retention tank provided with a filter, a bowl connected to the retention tank, and a main tank for the wastewater, the bowl and the retention tank being connected to said main tank via pipes, wherein the system comprises a diaphragm pump having an undulating diaphragm, the diaphragm pump comprising an inlet pipe connected to the retention tank, and an outlet pipe connected to the bowl, the diaphragm of the pump actuated by electromagnetic or magnetic actuation so as to remove wastewater present in the retention tank through the inlet pipe of the pump to the outlet pipe of the pump so as to supply wastewater to the bowl.

3. The grey-water management system according to claim 2 , wherein the electromagnetic or magnetic actuation is done by an electromagnetic linear actuator and a damper means that delimit the stroke of the electromagnetic linear actuator.

4. The grey-water management system according to claim 2 , wherein the pump has a cylindrical body delimiting a cylindrical chamber into which the inlet pipe opens out and from which the outlet pipe leads off with an axis of the outlet pipe coinciding with an axis of the cylindrical body, the undulating diaphragm comprising a central opening capable of registering with the outlet pipe.

5. The grey-water management system according to claim 4 , wherein the inlet pipe of the diaphragm pump extends radially relative to the pump body.

6. The grey-water management system according to claim 4 , wherein the inlet pipe of the diaphragm pump extends on the side opposite from the outlet pipe and with an axis of the inlet pipe coinciding with the axis of the outlet pipe.

7. The grey-water management system according to claim 4 , wherein the inlet pipe of the diaphragm pump comprises a plurality of vents in the cylindrical pump body so as to put the cylindrical chamber into communication with the outside of the pump.

8. The grey-water management system according to claim 2 , wherein the inlet pipe or the outlet pipe or both are provided with at least one filter.

9. The grey-water management system according to claim 2 , wherein the diaphragm pump comprises at least one sensor.

10. The grey-water management system according to claim 9 , wherein the at least one sensor comprises a pressure sensor, a temperature sensor, a grey water presence sensor, or any combination thereof.

11. The grey-water management system according to claim 2 , wherein the electromagnetic or magnetic actuation comprises movement of a magnetic disk.

12. The grey-water management system according to claim 11 , movement of the magnetic disk is along a pin perpendicular to the inlet pipe.

13. The grey-water management system according to claim 2 , wherein the electromagnetic or magnetic actuation comprises a permanent magnet secured to the undulating diaphragm.

14. The grey-water management system according to claim 2 , wherein the diaphragm comprises an elastomer diaphragm.