Air-conditioning system with a redundant feed of supply air

Abstract

The invention relates to an air-conditioning system with a redundant feed of supply air comprising at least one pack which is supplied with air, with at least one valve being arranged in the feed for the air flow control. In accordance with the invention, an electrical flow control valve and a pneumatic flow control valve are arranged in parallel connection in front of the pack for the air flow control.

1 - 11 . (canceled) 
     
     
         12 . An air-conditioning system, comprising:
 at least one pack which is supplied with air;   a redundant valve system including an electrical flow control valve (EFCV), which only provides electrical air flow control, and a pneumatic flow control valve (PBV), which only provides pneumatic air flow control, the EFCV and PBV arranged in a parallel connection upstream of the pack, the EFCV comprising an electrically-controlled actuator unit and a first flap unit which is set via a first pressure membrane, and the PBV comprising a pneumatically-controlled actuator unit and a second flap unit which is set via a second pressure membrane;   wherein if the EFCV fails, the flap unit of the EFCV is closed and the PBV is opened.   
     
     
         13 . The air-conditioning system in accordance with  claim 12 , wherein air flow through the EFCV can be measured continuously via pressure measurements in a Venturi nozzle provided in a line of the air-conditioning system upstream of the EFCV. 
     
     
         14 . The air-conditioning system in accordance with  claim 12 , wherein an air treatment device is connected upstream of the EFCV. 
     
     
         15 . The air-conditioning system in accordance with  claim 14 , wherein the air treatment device is an ozone converter. 
     
     
         16 . The air-conditioning system in accordance with  claim 14 , wherein the air treatment device is a device for the elimination of volatile organic compounds. 
     
     
         17 . The air-conditioning system in accordance with  claim 14 , wherein an air feed line for the PBV is led past the air treatment device. 
     
     
         18 . The air-conditioning system in accordance with  claim 12 , wherein the PBV controls air flow to a previously fixed pressure level in response to flow resistance of the pack. 
     
     
         19 . The air-conditioning system of  claim 12 , further comprising an auxiliary power unit which provides ground air supply. 
     
     
         20 . The air-conditioning system in accordance with  claim 12 , further comprising a first on/off solenoid connected to the electrically-controlled actuator unit of the EFCV and a second on/off solenoid connected to the pneumatically-controlled actuator unit of the PBV. 
     
     
         21 . The air-conditioning system in accordance with  claim 12 , further comprising a torque motor acting on the first pressure membrane, the torque motor configured to control an activation pressure of the first pressure membrane.