Patent ID: 9248912
Filing Date: 2016-02-02
CPC Classification: B64D,Y02T

Claim Text:
1. A method for emergency ventilation of an aircraft cabin of an aircraft, the aircraft located in an external aircraft environment, the method comprising: controlling at least one first valve, the first valve being arranged in a first aircraft fuselage area in the underfloor area, such that during normal operation the first valve serves as an air outlet valve of an aircraft cabin pressure control system, such that air from inside the aircraft cabin is conducted to the first aircraft fuselage area of aircraft and is discharged into the external aircraft environment through the opened first valve, and such that during an emergency ventilation operation the first valve serves as an air inlet valve such that air is supplied from the external aircraft environment into the first aircraft fuselage area through the opened first valve and is conducted from the first aircraft fuselage area into the aircraft cabin; controlling at least one second valve, the second valve being arranged in a second aircraft fuselage area in the underfloor area spaced apart from the first aircraft fuselage area along a longitudinal axis of the aircraft, such that during the normal operation and during the emergency ventilation operation the second valve serves as an additional air outlet valve of the aircraft cabin pressure control system, such that air is conducted from the aircraft cabin into the second aircraft fuselage area and is discharged into the external aircraft environment through the opened second valve; and controlling at least one recirculation fan of an aircraft air-conditioning system, such that during the normal operation the recirculation fan draws in air from the aircraft cabin and supplies the air to a mixing chamber of the aircraft air-conditioning system, and such that during the emergency ventilation operation the recirculation fan directly draws ram air, supplied from the external aircraft environment into the first aircraft fuselage area through the opened first valve, into the mixing chamber of the aircraft air-conditioning system and conveys the ram air from the mixing chamber into the aircraft cabin.