Patent ID: 6908062

Claim:
An environmental control system for an aircraft comprising: means for receiving air external to the aircraft; means for compressing said external air to a desired pressure; means for cooling said compressed air to a desired temperature; said cooling means comprising a vapor compression cycle; said vapor compression cycle loop including evaporation means for removing heat from said compressed air, a refrigerant flowing through said loop and heat from said compressed air being transferred to said refrigerant in said evaporation means, and means for compressing said refrigerant exiting said evaporation means; said external air compression means comprising a first compressor, said refrigerant compressing means comprising a second compressor, and means for driving said first and second compressors; said driving means comprising a turbine and means for supplying engine bleed air to said turbine; and said first and second compressors and said turbine being located on a single shaft.