Multiple compressor refrigeration system and controller thereof
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United States of America Patent
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-
May 24, 1983
Grant Date -
N/A
app pub date -
Nov 20, 1980
filing date -
Nov 20, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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