Patent ID: 9097449
Filing Date: 2015-08-04
Classification: B64F,F24F,F25B

Abstract:
1. A method for providing conditioned air to a parked aircraft on the ground, comprising: operating multiple air refrigeration units of a ground aircraft air conditioning system in parallel to refrigerate air for the aircraft, each refrigeration unit comprising multiple compressors and being controlled by a respective controller and all respective controllers being responsive to a common controller; controlling a common blower via the common controller to direct a single flow of air through evaporators of all of the multiple air refrigeration units; initially operating a single compressor of each refrigeration unit, and subsequently beginning operation of an additional compressor based on refrigerant pressure; monitoring refrigerant pressure of the multiple air refrigeration units; and discontinuing operation of at least one compressor of at least one refrigeration unit when the refrigerant pressure exceeds a predetermined limit; wherein the multiple air refrigeration units and the common blower are physically located outside the aircraft, a predetermined refrigerant pressure is associated with each refrigeration unit, each refrigeration unit's additional compressor begins operation at the associated predetermined refrigerant pressure, and the associated predetermined refrigerant pressures are staggered across the refrigeration units.