Refrigeration – Automatic control – Selective heating or cooling
Patent
1991-11-01
1993-11-23
Wayner, William E.
Refrigeration
Automatic control
Selective heating or cooling
62175, 62206, 364163, 395 61, F25B 1300, G05B 1302
Patent
active
052633330
ABSTRACT:
An outdoor unit has a compressor and an outdoor heat exchanger. Each of a plurality of indoor units has an indoor heat exchanger. The outdoor unit is connected in parallel with the plurality of indoor units to form a multi-type air conditioner system having a plurality of refrigeration cycles. A plurality of gaseous flow adjustment valves are provided to the gaseous sides of the indoor units, respectively. A plurality of liquid expansion valves are provided to the liquid sides of the indoor unit, respectively. A refrigerant super-heat degree detector detects a refrigerant super-heat degree of the outdoor heat exchanger or the indoor heat exchangers. A controller controls a capacity of the compressor and opening degrees of the gaseous flow adjustment valves in accordance with required capacities of the indoor units, and controls the liquid expansion valves in accordance with a detection output from the refrigerant super-heat degree detector such that the refrigerant super-heat degree becomes a predetermined value. The controller includes an optimum control unit for controlling opening degrees of at least one of the gaseous flow adjustment valves and the liquid expansion valves in accordance with operating states of the multi-type air conditioner system such that the operating states become optimum, respectively.
REFERENCES:
Umbers et al., Man-Machine Studies 1980, pp. 11-23.
Sugiyama, Rule Based Self-Organising Controller 1988, pp. 341-353.
Mamdani, Application of Fuzzy Algorithms for Control of Simple Dynamic Pant, Dec. 1974, pp. 1585-1588.
Fujita Yoshinobu
Kawamura Toshiaki
Kubo Tooru
Maezawa Mitsunobu
Kabushiki Kaisha Toshiba
Wayner William E.
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