Multiple compressor refrigeration system and controller thereof

Details Multiple compressor refrigeration system and controller thereof Multiple compressor refrigeration system and controller thereof

1980-11-20

1983-05-24

Makay, Albert J.

Refrigeration

Automatic control

Diverse, cascade or compound refrigeration-producing system

62228, 236 1EA, F25B 700

Patent

active

043844626

ABSTRACT:
A multiple-compressor refrigeration system for use in commercial refrigeration applications includes a plurality of compressors of unequal refrigeration capacity connected in a refrigeration circuit that includes a condenser and a plurality of associated evaporators and expansion devices in remotely located refrigerated enclosures. A system controller is connected to a pressure responsive transducer that measures the suction pressure of the system and compares the so-measured suction pressure to a desired suction pressure and selects one of a plurality of 2.sup.n available compressor operating states in accordance with the measured difference. The system advantageously increases overall system efficiency by providing increments or decrements of compressor capacity that are more precisely matched to system load changes as compared to prior multiple-compressor systems.

REFERENCES:
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patent: 3744932 (1973-07-01), Prevett
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patent: 3885938 (1975-05-01), Ordonez
patent: 4081691 (1978-03-01), Evalds et al.
patent: 4152902 (1979-05-01), Lush
patent: 4184341 (1980-01-01), Friedman

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