Wireless method and apparatus for monitoring and controlling food temperature
US6378315B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2007/422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.