| 摘要 |
The invention relates to an air-conditioning unit (1) comprising an air circuit with an air inlet (5), a main fan (10) and an air outlet (6) designed to be connected to a chamber such as, for example, an aircraft parked on the ground, preferably via one or more flexible ducts, and a refrigerant circuit comprising a heat exchanger/evaporator (12) positioned in said air circuit to cool the air by evaporating the refrigerant, a compressor (17) and a condenser (18) for condensing the refrigerant before it is returned to the heat exchanger/evaporator (12). Said heat exchanger/evaporator (12) comprises several parallel circuits (19) each having at least one regulator valve (20). Said air circuit also comprises a temperature probe ST3 downstream of the heat exchanger/evaporator (12) and connected to means of controlling said regulator valves (20) to regulate the flow of refrigerant so as to keep the air temperature downstream of the heat exchanger/evaporator (12) within a reference range, and a pressure probe SP1 at the air outlet (6) and connected to means of regulating the speed and/or the power of the main fan (10) so as not to exceed a maximum raised pressure at the air outlet (6). Said refrigerant circuit also comprises a pressure probe SP3 on the intake side of the compressor (17) and connected to means for regulating the mass flow rate of refrigerant drawn in by the compressor (17) so as to keep the intake pressure of the compressor (17) in a reference range. The present invention also relates to an air-conditioning method.
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