Device for improving the breathing air quality in an aircraft cabin

1. A device for improving the breathing air quality for the crew and/or the passengers in an aircraft cabin including a locally delimited area and a region surrounding the locally delimited area, the device comprising:

an oxygen source,

a water source, and

a feed line,

wherein the feed line is connectable to the oxygen source and the water source in order to oxygenate and/or humidify air that is introduced into the feed line,

wherein the feed line is further connected to an inlet port of the locally delimited area of the aircraft cabin and adapted so as to feed oxygenated and/or humidified air having a first oxygen partial pressure to the locally delimited area of the aircraft cabin during normal operation of the aircraft, the first oxygen partial pressure being higher than a second oxygen partial pressure located in the region surrounding the locally delimited area, and

wherein the feed line feeds oxygenated and/or humidified air to the locally delimited area of the aircraft cabin at a third oxygen partial pressure that is higher than the first oxygen partial pressure during emergency operation of the aircraft, such that the feed line is used as an emergency oxygen supply system during depressurization of the aircraft cabin.

2. The device of claim 1 , wherein the feed line is connected to an inlet port of a separating device, which is adapted so as to separate the locally delimited area of the aircraft cabin from the region of the aircraft cabin that surrounds the locally delimited area.

3. The device of claim 2 , wherein the separating device is designed in the form of a person cabin, a hood suitable for accommodating the head of a person, or a mask that may be placed over the facial region of a person.

4. The device of claim 1 , wherein the feed line is connected to an inlet port designed in the form of a nozzle.

5. The device of one claim 1 , further comprising a discharge line, which is connected to an outlet port of the locally delimited area of the aircraft cabin and is adapted so as to remove stale air from the locally delimited area of the aircraft cabin.

6. The device of claim 5 , wherein the outlet port of the locally delimited area of the aircraft cabin comprises a pressure relief valve.

7. The device of claim 1 , wherein the oxygen source comprises an oxygen reservoir, which is designed in the form of a solid reservoir, a chemical generator, a compressed-gas reservoir or a fluid gas reservoir, and/or an oxygen production system that comprises a molecular sieve oxygen generator or a hollow fibre filter.

8. The device of claim 1 , wherein the water source is connectable to the feed line via an air humidifier.

9. The device of claim 1 , wherein the water source comprises a water storage tank and/or a device for collecting condensation water from the aircraft cabin, an aircraft engine, an aircraft air-conditioning system, an aircraft galley, a fuel cell provided on board the aircraft or from some other system of the aircraft.

10. A method of supplying air into an aircraft cabin including a locally delimited area and a region surrounding the locally delimited area, the method comprising:

oxygenating the air with an oxygen source,

humidifying the air with a water source,

feeding the oxygenated and humidified air at the first oxygen partial pressure through a feed line into the locally delimited area during normal operation of the aircraft, the first oxygen partial pressure being higher than a second oxygen partial pressure in the region surrounding the locally delimited area, and

feeding the oxygenated and humidified air at a third oxygen partial pressure higher than the first oxygen partial pressure through the feed line into the locally delimited area during emergency operation of the aircraft, such that the feed line is used as an emergency oxygen supply system during depressurization of the aircraft cabin.