G - Physics – 08 – C
Patent
G - Physics
08
C
G08C 17/00 (2006.01) G05D 23/19 (2006.01) F25D 29/00 (2006.01)
Patent
CA 2345891
A system and method for controlling refrigeration including a temperature sensor operable to measure a temperature from a refrigeration case and a transceiver in communication with the temperature sensor and operable to wirelessly transmit data. A repeater receives the wirelessly transmitted data and further wirelessly transmits the data to a receiver. A controller in communication with the receiver controls the refrigeration system based upon the wirelessly transmitted data from the refrigeration case. The refrigeration case also includes a mode switch for suspending temperature reading and control for a period of time. For example, the mode switch can be used by an operator during cleaning or maintenance of the refrigerator case. Temperature control algorithms are used by the controller, and include: dead-band range (DB), proportional/integral (PI), proportional/integral/differentiation (PID) and fuzzy-logic (FL).
Chabucos Jim
Gatling William
Rippe Herb
Singh Abtar
Computer Process Controls Inc.
Smart & Biggar
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