Food preparation

Patent metadata

Field	Value
Publication number	US-10492247-B2
Application number	US-201514833523-A
Country	US
Kind code	B2
Filing date	Aug 24, 2015
Priority date	Feb 21, 2006
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A heating profile of a microwave oven is modified using microwaves at a plurality of frequencies. A power of transmission to a cavity of the microwave oven of microwaves is defined at each of the plurality of frequencies. A duration is defined for which the microwaves are transmitted at each of the plurality of frequencies. For each of the plurality of frequencies, a proportion of power input to the cavity that is not output from the cavity is measured. The measured proportions am used to modify the power of transmission at each frequency, the duration of transmission at each frequency or both.

First claim

What is claimed is:

1. A method for modifying a heating profile of a microwave oven using microwaves at a plurality of frequencies that are within a range of 300 MHz to 3 GHz, the method comprising:
defining a power of transmission to a cavity of the microwave oven of microwaves at each of the plurality of frequencies;
defining a duration for which said microwaves are transmitted at each of the plurality of frequencies; feeding microwave energy via at least one feed of a plurality of feeds into the cavity;
measuring, for each of the plurality of frequencies, a proportion of power input to the cavity that is not output from the cavity; and
using the measured proportions to modify the power of transmission at each frequency, the duration of transmission at each frequency, or both, wherein the measuring comprises measuring a power coupled to other feeds of the plurality of feeds at each frequency and a return loss to the at least one feed of the plurality of feeds at each frequency.

2. A method for modifying a heating profile of a microwave oven, the method comprising: feeding microwave energy via at least one feed of a plurality of feeds into the cavity;
heating an object in a cavity of the microwave oven utilizing a plurality of transmitted frequencies that are within a range of 300 MHz to 3 GHz;
measuring an efficiency of absorption of energy in the object being heated as a function of frequency;
varying the transmitted frequencies in a controlled manner; and
adjusting a duration of transmission at each said transmitted frequency based on the measured efficiency, wherein the measuring comprises measuring a power coupled to other feeds of the plurality of feeds at each frequency and a return loss to the at least one feed of the plurality of feeds at each frequency.

3. The method of claim 2 , further comprising calculating power absorbed by the object based on an input power and the measured efficiency of absorption.

4. The method of claim 2 , wherein the measuring comprises measuring, for each of the plurality of transmitted frequencies, a proportion of power input to the cavity that is not output from the cavity.

5. The method of claim 2 , further comprising using the measured efficiency to modify an input power of transmission at each of the plurality of transmitted frequencies.

6. The method of claim 2 , wherein the varying and the adjusting occur during the heating.

Assignees

• Goji Ltd

Inventors

• Ben-Shmuel Eran
• Bilchinsky Alexander
• Einav Omer
• Rousso Benny
• Ben-Haim Shlomo

Classifications

• H05B6/686

  Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators · CPC title

• H05B6/70

  Feed lines · CPC title

• H05B6/6455

  the sensors being infrared detectors · CPC title

• B65D2581/3447

  Heat attenuators, blocking agents or heat insulators for temperature control · CPC title

• B65D2581/3491

  attached to the side walls · CPC title