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1. (WO2018125147) ELECTROMAGNETIC COOKING DEVICE WITH AUTOMATIC LIQUID HEATING AND METHOD OF CONTROLLING COOKING IN THE ELECTROMAGNETIC COOKING DEVICE

Pub. No.:    WO/2018/125147    International Application No.:    PCT/US2016/069244
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 30 00:59:59 CET 2016
IPC: H05B 6/72
Applicants: WHIRLPOOL CORPORATION
PANASONIC CORPORATION
Inventors: GUATTA, Davide
NOCELLA, Valeria
Title: ELECTROMAGNETIC COOKING DEVICE WITH AUTOMATIC LIQUID HEATING AND METHOD OF CONTROLLING COOKING IN THE ELECTROMAGNETIC COOKING DEVICE
Abstract:
An electromagnetic cooking device and method of controlling the same is provided herein. The cooking device has a cavity in which a liquid is placed and a plurality of RF feeds configured to introduce electromagnetic radiation into the cavity for heating the liquid. A controller is provided and is configured to: analyze forward and backward power at the plurality of RF feeds to calculate efficiency; determine and monitor a coefficient of variation of the efficiency; detect a specified temperature of the liquid based on changes in the coefficient of variation; and adjust a power level of the electromagnetic radiation in response to detection of the specified temperature.