Adjustable air conditioning control system for a universal airplane ground support equipment cart

An air conditioning system which detachably connects to a port on an airplane, the system comprising:

• an air conduit connecting an air intake and filter to a coupling adapted to be connected to one end of an air duct or hose the other end of which is adapted to be connected to an airplane's port;
• a variable speed blower in said air conduit, a pressure sensor connected to said air conduit adjacent said coupling to sense the pressure of air passing into the airplane, and a controller receiving as inputs the pressure sensed by said pressure sensor and a setpoint pressure which can be varied to match the requirements of different types or classes of airplane, the controller varying the speed of the blower to regulate the pressure supplied to an airplane;
• at least one air conditioner comprising a circular refrigerant conduit channeling refrigerant through a compressor, a condenser, an expansion valve, and an evaporator, the evaporator positioned in said air conduit,
• a condenser cooling fan driving air through the two condensers and controlled by a controller responsive to one or more pressures or temperatures measured in one of the air or refrigerant conduits or in the surrounding air;
• and
• a refrigerant circuit that bypasses the condenser and expansion valve and that includes a compressor exhaust bypass valve controlled by a controller receiving a signal from a temperature sensor connected to said air conduit downstream of the air conditioner's evaporator and also receiving a setpoint temperature value.