Patent ID: 8365550

Claim:
An aircraft air conditioning system with at least one compressor (C), comprising a first conduit ( 10 ) which is connected with the pressure side of the compressor (C) and in which one or more cooling means provided downstream of the compressor (C) are arranged for cooling the air compressed in the compressor (C), a single turbine (T) arranged in the first conduit ( 10 ), and a second conduit designed as bypass conduit ( 20 ), which is connected with the pressure side of the compressor (C) and arranged such that it conducts at least part of the air compressed in the compressor (C) in a bypass around at least one of the cooling means and with said single turbine (T) arranged in said first conduit ( 10 ) just upstream of the return junction with said second conduit ( 20 ), wherein a bypass throttle means (TCV_H) is arranged in the bypass conduit ( 20 ), by which the mass flow of the air conducted through the bypass conduit ( 20 ) can be varied, in the first conduit ( 10 ) a first throttle means (TCV_C, VTN) is arranged, by which the mass flow of the air conducted through the first conduit ( 10 ) can be varied, a single unit (ECU) is provided, which is designed such that it can be operated in a first operating mode, second operating mode, or both first and second operating modes, in the first operating mode, when opening of the bypass throttle means (TCV_H) provided in the bypass conduit ( 20 ) is increased, the unit (ECU) effects reduction of opening of the first throttle means (TCV_C, VTN) provided in the first conduit ( 10 ), inversely, when opening of the bypass throttle means (TCV_H) provided in the bypass conduit ( 20 ) is reduced, the unit (ECU) effects increase of opening of the first throttle means (TCV_C, VTN) provided in the first conduit ( 10 ), in the second operating mode, the unit (ECU) effects increase of opening of both the bypass throttle means (TCV_H) provided in the bypass conduit ( 20 ) and first throttle means (TCV_C, VTN) provided in the first conduit ( 10 ) or reduction of opening of both the bypass throttle means (TCV_H) provided in the bypass conduit ( 20 ) and first throttle means (TCV_C, VTN) provided in the first conduit ( 10 ), and with pressure at an outlet of said compressor (C) remaining essentially constant in all said operating modes.