Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1989-06-07
1990-06-12
Wayner, William E.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62226, 622283, F25B 700
Patent
active
049322206
ABSTRACT:
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.
REFERENCES:
patent: 2231069 (1941-02-01), Harris
patent: 4384462 (1983-05-01), Overman et al.
patent: 4720982 (1988-01-01), Shimizu et al.
patent: 4766735 (1988-08-01), Gotou
Kabushiki Kaisha Toshiba
Wayner William E.
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