AN ADJUSTABLE AIR CONDITIONING CONTROL SYSTEM FOR A UNIVERSAL AIRPLANE GROUND SUPPORT EQUIPMENT CART

摘要

A ground support equipment air conditioning system detachably connects to a port on an airplane. An air conduit connects an air intake and filter to a coupling that is adapted to be connected to one end of an air duct or hose (26) the other end of which is adapted to be connected to an airplane's port. A variable speed blower (508) in the air conduit has its speed varied by a controller (525) to regulate the pressure supplied to an airplane. This controller receives as inputs the pressure sensed by a pressure sensor (526) connected to the air conduit adjacent the coupling to sense the pressure of air passing into the airplane and also a setpoint pressure which can be varied to match the requirements of different types or classes of airplane. First and second air conditioners (520, 522) each include a circular refrigerant conduit channeling refrigerant through a compressor, a condenser, an expansion valve, and an evaporator. The evaporators are positioned in the air conduit with the first air conditioner's evaporator (504) preceding the blower (508) and the second air conditioner's evaporator (514) following the blower in the air conduit. A condenser cooling fan drives air through the two condensers and is controlled by a controller (1900) responsive to one or more pressures or temperatures measured in one of the air or refrigerant conduits or in the surrounding air.