A PRECONDITIONED AIR UNIT WITH VARIABLE FREQUENCY DRIVING

A preconditioned air unit (10) for supplying preconditioned air to an aircraft parked on the ground, the preconditioned air unit (10) comprising a housing (12) accommodating a flow duct (20) with an air inlet (22) for ambient air and an air outlet (25) for connection to the parked aircraft, a blower...

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Bibliographic Details
Main Authors NIELSEN, BO VORK, OLSSON, HENRIK, SCHR?DER, LARS, DAHL, S?REN RISGAARD
Format Patent
LanguageEnglish
Published 18.02.2021
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Summary:A preconditioned air unit (10) for supplying preconditioned air to an aircraft parked on the ground, the preconditioned air unit (10) comprising a housing (12) accommodating a flow duct (20) with an air inlet (22) for ambient air and an air outlet (25) for connection to the parked aircraft, a blower (30) connected with the flow duct (20) for generation of an air flow from the air inlet (22) toward the air outlet (25), at least one refrigeration system, each of which includes at least one compressor (38), at least one condenser (40), at least one expansion valve (42), and at least one evaporator (44) connected in a flow circuit containing a refrigerant, and wherein the at least one evaporator (44) interacts with the air flow in the flow duct (20), and at least one variable frequency driver (46) for power supply of at least one of the at least one compressor (38) of the at least one refrigeration system.
Bibliography:Application Number: MY2011PI04409