Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1989-02-06
1990-05-22
Wayner, William E.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62225, F25B 700
Patent
active
049266527
ABSTRACT:
An outdoor unit has at least a variable-capability compressor and an outdoor heat exchanger coupled thereto. A plurality of indoor units each have at least an indoor heat exchanger and a section for outputting demand-capability data according to an air-conditioning load of the indoor heat exchanger. A distributing unit serves to couple the outdoor unit and the plurality of indoor units in parallel to form respective refrigeration cycles, and has a plurality of refrigerant flow controllers corresponding to the respective refrigeration cycles. A first controller sends refrigerant flow control commands associated with the demand-capability data of the indoor units to the refrigerant flow controllers of the distributing unit and outputs sum data of the demand-capability data. A second controller sends a capacity-change control command to the variable-capability compressor of the outdoor unit, in accordance with the sum data from the first controller. A refrigerant super-heat detector detects a degree of refrigerant super-heat in each indoor unit. A third controller sends refrigerant flow compensation commands, associated with a detection output of the refrigerant super-heat detector, to the respective refrigerant flow controllers of the distributing unit.
REFERENCES:
patent: 4418548 (1983-12-01), Sawyer
patent: 4448038 (1984-05-01), Barbier
patent: 4480442 (1984-11-01), Ide et al.
patent: 4766735 (1988-08-01), Gotou
patent: 4771610 (1988-09-01), Nakashima et al.
patent: 4787211 (1988-11-01), Shaw
British Search Report dated Apr. 12, 1989.
Kabushiki Kaisha Toshiba
Wayner William E.
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