US Patent No. 10,772,165

SYSTEM AND METHOD FOR ZONE COOKING ACCORDING TO SPECTROMODAL THEORY IN AN ELECTROMAGNETIC COOKING DEVICE


Patent No. 10,772,165
Issue Date September 08, 2020
Title System And Method For Zone Cooking According To Spectromodal Theory In An Electromagnetic Cooking Device
Inventorship Davide Guatta, Brescia (IT)
Mattia Rigo, Varese (IT)
Assignee Whirlpool Corporation, Benton Harbor, MI (US)

Claim of US Patent No. 10,772,165

1. A method for controlling a heating distribution of an electromagnetic cooking device comprising:scanning a resonant cavity of the cooking device in which a food load has been placed with a plurality of radio frequency (RF) feeds that are coupled to a plurality of respective high power amplifiers;
based on the scanning, identifying a plurality of resonant frequencies and corresponding phases of the RF feeds;
creating and storing a resonance map in the frequency phase domain;
classifying symmetries in the resonant map;
determining paths defining stirring routes between poles of different symmetries;
determining midpoints in the paths with a maximum unbalance between reflected powers of the plurality of respective high power amplifiers;
classifying the unbalance in terms of power steered to a first side of the food load with respect to power steered to a second side of the food load;
synthesizing a heating strategy for zone cooking using the classified unbalance; and
implementing the heating strategy by causing the plurality of high power amplifiers and RF feeds to introduce electromagnetic radiation at specific frequencies and phases into the cavity, wherein the specific frequencies and phases are selected in accordance with the heating strategy.