WIRELESS METHOD AND APPARTUS FOR MONITORING AND CONTROLLING FOOD TEMPERATURE

摘要

A system and method for controlling refrigeration including a temperature sensor operable to measure a temperature from a refrigeration case and a transceive r in communication with the temperature sensor and operable to wirelessly transmi t 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 cas e. 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).