Process and system for controlling the pressure in an aircraft cabin

Abstract

In a process and a system (10) for controlling the pressure in an aircraft cabin the status of at least one aircraft door is detected by at least one detection device (12a-c, 14a-c, 16a-c, 18a-c). A signal indicative of the status of the aircraft door is transmitted to a unit (36) for controlling an avionics ventilation system. The avionics ventilation system is controlled in dependence upon the signal indicative of the status of the aircraft door in such a way that a build-up of pressure in the aircraft cabin is prevented when the signal indicative of the status of the aircraft door indicates that the aircraft door is not fully closed and secured.

Description

technical field [0001] The present invention relates to methods and systems for controlling the pressure within a portion of an aircraft that is normally maintained at a pressure higher than ambient pressure during flight. Background technique [0002] Since the ambient pressure at the cruising altitude of the aircraft is significantly lower than the air pressure at sea level, it is necessary to increase the pressure above the ambient pressure in the aircraft cabin and possibly also in the aircraft cargo compartment. Typically at a cruising altitude of 9000-12000 m, the cabin pressure in a passenger aircraft is about 750 mbar, which corresponds to the ambient pressure at an altitude of about 2500 m above sea level. To pressurize the aircraft cabin, air is usually supplied into the passenger cabin from an air conditioning system, wherein pressure control is taken by a cabin pressurization system comprising at least one exhaust valve arranged eg under the fuselage of the aircr...

AI Technical Summary

Problems solved by technology

[0007] Especially at high altitudes, the low air pressure that exists in the cabin after depressurization leads to the problem in these aircraft that the fans used to cool the avionics systems are no longer able to provide sufficient cooling energy, i.e. no longer able to fully utilize

When the cabin is repressurized during flight, for example after an in-flight cargo drop, the air conditioning system cannot be used for the PoP function if the aircraft doors are not properly closed and secured, as the supply of air to the cabin is prevented or interrupted Can lead to insufficient cooling and consequent damage to avionics systems

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