Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1990-06-19
1991-09-24
Tanner, Harry B.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62158, 622283, F25B 502
Patent
active
050503979
ABSTRACT:
An outdoor unit includes at least two compressors and an outdoor heat exchanger commonly coupled thereto. An indoor unit is coupled to the outdoor unit to form a refrigeration cycle. The indoor unit includes at least an indoor heat exchanger and means for outputting required capacity data in accordance with an air-conditioning load with respect to the indoor heat exchanger. A pressure detector detects the high-pressure-side pressure of the refrigeration cycle. A first control section controls the number of compressors to be driven. The first control section sequentially starts the two compressors so as to control the compressors in a parallel operation state when the number of compressors to be driven is controlled to be two. A second control section includes a comparing portion for fetching pressure data from the pressure detector and comparing the pressure data with a reference value after the first compressor is started when the two compressors are to be sequentially started by the first control section, a portion for providing a command for allowing an operation start of the second compressor to the first control section when the pressure data is found to be lower than the reference value by the comparing portion, and means for providing a command for inhibiting an operation start of the second compressor to the first control section when the pressure data is found to be equal to or higher than the reference value by the comparing portion.
REFERENCES:
patent: 4932220 (1990-06-01), Inoue
Hasegawa Norihisa
Inoue Tsunetoshi
Sugiyama Akiyoshi
Kabushiki Kaisha Toshiba
Tanner Harry B.
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