Method for heating a cooking vessel with an induction heating device and induction heating device

Patent metadata

Field	Value
Publication number	US-9554424-B2
Application number	US-201213627807-A
Country	US
Kind code	B2
Filing date	Sep 26, 2012
Priority date	Sep 26, 2011
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A method for heating a cooking vessel utilizing an induction heating device is provided. According to various aspects, the induction heating device includes a resonant circuit with an induction heating coil. A specified amount of energy may be supplied to the cooking vessel with the induction heating device depending on a heating power level selected by a user and/or on a cooking vessel type selected by the user. A parameter value of the resonant circuit which is dependent on a temperature of the cooking vessel, in particular of the bottom of the cooking vessel, may be determined and stored. The parameter value may be regulated to a setpoint which is dependent on the stored parameter value.

First claim

The invention claimed is:

1. A method for heating a cooking vessel utilizing an induction heating device, the method comprising:
supplying a specified amount of energy to the cooking vessel from the induction heating device based on measuring one of a current profile through the induction heating device or a voltage profile across the induction heating device, the induction heating device comprising a resonant circuit and an induction heating coil, wherein the specified amount of energy depends on at least one of a heating power level selected by a user or a cooking vessel type selected by the user;
applying a specified heating power to the cooking vessel for a specified settling time after the supplying the specified amount of energy to the cooking vessel, wherein the settling time is chosen to be between one second and 10 seconds, and the specified heating power is chosen to be between 10% and 50% of a rated heating power;
after the specified settling time, determining and storing a parameter value of the resonant circuit, wherein the parameter value comprises a period duration of a natural-frequency resonant oscillation of the resonant circuit and wherein the parameter value being dependent on a temperature of a bottom of the cooking vessel; and
regulating the parameter value to a setpoint which is dependent on the stored parameter value.

2. The method of claim 1 , wherein the setpoint of the parameter value is equal to the stored parameter value.

3. The method of claim 1 , further comprising outputting a signal to the user after supplying the specified amount of energy to the cooking vessel.

4. The method of claim 1 , wherein the determining and storing the parameter value of the resonant circuit occurs after applying the specified heating power to the cooking vessel.

5. An induction heating device, comprising:
a resonant circuit comprising an induction heating coil;
a device configured to measure a specified amount of energy supplied to a cooking vessel by measuring one of a current profile through the induction heating coil or a voltage profile across the induction heating coil; and
a control device configured to
provide the measured specified amount of energy to the cooking vessel depending on at least one of a heating power level selected by a user or a cooking vessel type selected by the user,
apply a specified heating power to the cooking vessel for a specified settling time after the supplying the specified amount of energy to the cooking vessel, wherein the settling time is chosen to be between one second and 10 seconds, and the specified heating power is chosen to be between 10% and 50% of a rated heating power;
after the specified settling time, determine and store a parameter value of the resonant circuit, wherein the parameter value comprises a period duration of a natural-frequency resonant oscillation of the resonant circuit and wherein the parameter value being dependent on a temperature of a bottom of the cooking vessel, and
regulate the parameter value to a setpoint which is dependent on the stored parameter value.

6. The induction heating device of claim 5 , wherein the control device is further configured to determine and store the parameter value of the resonant circuit after applying the specified heating power to the cooking vessel.

7. A method for heating a cooking vessel utilizing an induction heating device, the method comprising:
supplying a specified amount of energy to the cooking vessel from the induction heating device based on measuring energy supplied to the cooking vessel, the induction heating device comprising a resonant circuit and an induction heating coil, wherein the specified amount of energy depends on at least one of a heating power level selected by a user or a cooking vessel type selected by the user;
applying a specified heating power to the cooking vessel for a specified settling time after the supplying the specified amount of energy to the cooking vessel, wherein the settling time is chosen to be between one second and 10 seconds, and the specified heating power is chosen to be between 10% and 50% of a rated heating power;
determining and storing, after applying the specified heating power to the cooking vessel, a parameter value of the resonant circuit, wherein the parameter value comprises a period duration of a natural-frequency resonant oscillation of the resonant circuit and wherein the parameter value being dependent on a temperature of a bottom of the cooking vessel; and
regulating the parameter value to a setpoint which is dependent on the stored parameter value.

8. The method of claim 7 , wherein supplying the specified amount of energy to the cooking vessel from the induction heating device being further based on measuring one of a current profile through the induction heating device or a voltage profile across the induction heating device.

Assignees

• Ego Elektro Geraetebau Gmbh

Inventors

• Schilling Wilfried
• Egenter Christian
• Kappes Werner
• Westrich Stefan

Classifications

• H05B6/062 Primary

  for cooking plates or the like · CPC title

• H05B2213/07

  Heating plates with temperature control means · CPC title