Patent ID: 6360553
Filing Date: 2002-03-26
Classification: F25B,F25D

Abstract:
An apparatus for refrigeration system control, said apparatus comprising:a plurality of circuits, each circuit having at least one refrigeration case; an electronic evaporator pressure regulator in communication with each circuit, each of said electronic evaporator pressure regulators operable to control a temperature of one of said circuits; a sensor in communication with each circuit and operable to measure a refrigerant pressure out of said circuit; a plurality of compressors, each compressor forming a part of a compressor rack; and a controller operable to control each electronic evaporator pressure regulator and a suction pressure of said compressor rack, said controller controlling each electronic evaporator pressure regulator based upon said pressure measurement from each of said circuits and at least one of relative humidity (RH) inside a building and a sub-cooling value of refrigerant delivered to each circuit.