AIR-CONDITIONING UNIT AND METHOD

摘要

An air-conditioning unit including an air circuit with an air inlet, a main fan and an air outlet designed to be connected to a chamber, preferably via one or more flexible ducts, and a refrigerant circuit including a heat exchanger/evaporator positioned in the air circuit to cool the air by evaporating the refrigerant, a compressor and a condenser for condensing the refrigerant before it is returned to the heat exchanger/evaporator. The heat exchanger/evaporator includes several parallel circuits each having at least one regulator valve. The air circuit also includes a temperature probe downstream of the heat exchanger/evaporator and connected to a controller which controls the regulator valves to regulate the flow of refrigerant, and a pressure probe at the air outlet and connected to a regulator for regulating the speed and/or the power of the main fan so as not to exceed a maximum raised pressure at air outlet.

主权项

1. An air conditioning unit comprising:
a body; an air inlet formed in the body; an air outlet from the body, the air outlet connectable to an enclosure having predetermined pressure and flow rate characteristics; an outlet temperature sensor located at the air outlet; an air treatment chamber located within the body between the air inlet and the air outlet; an exchanger/evaporator operable for cooling air passing through the air treatment chamber, the exchanger/evaporator including a plurality of parallel circuits each of which includes an individually controllable pressure reducing valve for regulating the flow rate of refrigerant through the exchanger/evaporator; a compressor operable for supplying refrigerant to each parallel circuit of the exchanger/evaporator, the flow rate of refrigerant being determined in accordance with the temperature sensed by the outlet temperature sensor; a fan located in the body and operable for drawing air from the air inlet, through the air treatment chamber and to the air outlet, the fan being controllable to produce an air conditioned flow rate in accordance with the predetermined pressure and flow rate characteristics of the enclosure to which air conditioning is to be supplied; and a controller operable for controlling at least each individually controllable pressure reducing valve in accordance with the temperature sensed by the outlet temperature sensor to adjust automatically refrigeration power supplied to the enclosure to which the unit is connectable.