METHOD AND SYSTEM FOR CONTROLLING THE PRESSURE IN AN AIRCRAFT CABIN

摘要

In controlling pressure in an aircraft cabin, during flight operation, an effective flow cross-sectional area of at least one outflow valve is controlled to adjust air flow exiting the cabin through the outflow valve so pressure within the cabin is controlled according to a predetermined cabin pressure control strategy. During flight operation of the aircraft, an effective flow cross-sectional area of at least one negative relief valve is controlled to adjust air flow entering the cabin through the negative relief valve so a negative differential pressure between the pressure within the aircraft cabin and an ambient pressure prevailing outside of the aircraft cabin is prevented from exceeding a predetermined threshold value. During ground operation of the aircraft, the effective flow cross-sectional area of the at least one negative relief valve is controlled to allow an equalization between pressure within the cabin and ambient pressure prevailing outside of the aircraft.

主权项

1. A method for controlling the pressure in an aircraft cabin, the method comprising:
during flight operation of the aircraft, controlling an effective flow cross-sectional area of at least one outflow valve so as to adjust an air flow exiting the aircraft cabin through the outflow valve such that the pressure within the aircraft cabin is controlled in accordance with a predetermined cabin pressure control strategy; during flight operation of the aircraft, controlling an effective flow cross-sectional area of at least one negative relief valve so as to adjust an air flow entering the aircraft cabin through the negative relief valve such that a negative differential pressure between the pressure within the aircraft cabin and an ambient pressure prevailing outside of the aircraft cabin is prevented from exceeding a predetermined threshold value; and during ground operation of the aircraft, controlling the effective flow cross-sectional area of the at least one negative relief valve so as to allow an equalization between the pressure within the aircraft cabin and the ambient pressure prevailing outside of the aircraft.