Patent ID: 6647735
Filing Date: 2003-11-18
Classification: F25B,G05D,Y02B

Abstract:
A commercial refrigeration system suitable for use in a supermarket, said system comprising:at least one fixture; an evaporator constructed and arranged for cooling the at least one fixture; a refrigerant supply line supplying a pressurized refrigerant to the evaporator; a master controller selectively supplying a fixture control signal having a parameter indicative of a desired fixture control action for the at least one fixture; at least one fixture sensor associated with the at least one fixture; the at least one fixture sensor being constructed and arranged to provide a fixture status signal having a parameter representative of an operating condition associated with the at least one fixture; a communication channel extending from the master controller; a fixture controller in communication with the master controller over the communication channel; the fixture controller receiving the fixture control signal over the communication channel and affecting the operation of the fixture controller in response to the fixture control signal; and the fixture controller being constructed and arranged for receiving the fixture status signal from the at least one fixture sensor and supplying the fixture status signal to the master controller over the communication channel.