| 摘要 |
An outdoor unit has at least two compressors including at least one variable-capability compressor, and an outdoor heat exchanger coupled to the two compressors. A plurality of indoor units are connected to the outdoor unit to constitute a refrigeration cycle, and each indoor unit includes at least an indoor heat exchanger, and a section for outputting required capability data in accordance with an air-conditioning load of the indoor heat exchanger. A pressure sensor senses a higher-side pressure of the refrigeration cycle constituted by coupling the outdoor unit to the plurality of indoor units. A control section generates an operating command for designating the predetermined number of operation of the two compressors and a predetermined capability of the variable-capability compressor in accordance with required capability data from the plurality of indoor units, and generates a correction command to correct the number of operation of the two compressors and the capability of the variable-capability compressor in response to the detection output from the pressure sensor in order prevent an abnormal increase in higher-side pressure of the refrigeration cycle.
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