Patent ID: 8042349

Claim:
A DEVICE TO CONTROL VENTILATION AND AIR CONDITIONING IN AN AIRCRAFT ON THE GROUND, which must be connected ( 12 ) to an engines' start-up system, comprising a temperature selection system ( 6 ) in a cabin ( 3 ) of the aircraft, a temperature measurement system ( 8 ) in the cabin ( 3 ) of the aircraft, systems including a pneumatic air conditioning system ( 2 ), connected to a pneumatic energy supply system, an electrically powered pneumatic compressor system ( 4 ) connected to an electrical energy supply system and to a pneumatic air conditioning system ( 2 ); and a combination of the above, to control the ventilation and air conditioning of an aircraft based on the difference between a selected temperature ( 6 ) and a measured temperature ( 8 ), said device comprising a system of ( 5 ) ecological operating mode selection for ventilation and air conditioning, a system that detects whether or not an ecological mode has been selected ( 10 , 10 a ), a system to detect the position of the aircraft on the ground ( 10 , 10 b ), a system to detect whether the aircraft's engines are off ( 10 , 10 c ), a system to detect whether a selected energy supply system has been activated ( 10 , 10 d )—this may be either the pneumatic energy supply or electrical energy supply, a system to detect whether air is being supplied ( 10 , 10 e ), a system to detect whether the engine's start up system has been activated ( 13 ), and a system that generates ( 10 ) an ecological operating mode signal ( 16 ), corresponding to an optimal minimum demand for ventilation and air conditioning, which is selectively applied to the pneumatic energy supply system, the electrically powered pneumatic compressor system and the electrical energy supply system, when ecological operating mode has been selected, the aircraft is detected to be on the ground, the engines are detected off and the engines' start up system has not been activated, the selected energy supply—either the pneumatic energy supply system or the electrical energy supply system is activated and supplying air, to control the ventilation and air conditioning in accordance with a minimum level established by the ecological operating mode signal ( 16 ) independent of a difference between the selected temperature ( 6 ) and the temperature measured ( 8 ), to save energy.