Induction HOB device

Patent metadata

Field	Value
Publication number	US-10694589-B2
Application number	US-201415030382-A
Country	US
Kind code	B2
Filing date	Oct 27, 2014
Priority date	Nov 5, 2013
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An induction hob device includes at least one induction heating element adapted to heat a cooking utensil, and at least one detection circuit which cooperates with the at least one induction heating element to detect a presence of the cooking utensil. The at least one detection circuit is hereby directly connected to the at least one induction heating element irrespective of an operating state.

First claim

The invention claimed is:

1. An induction hob device, comprising:
at least one induction heating element adapted to heat a cooking utensil;
at least one detection circuit cooperating with the at least one induction heating element to detect a presence of the cooking utensil, said at least one detection circuit being directly connected to the at least one induction heating element irrespective of an operating state, said at least one detection circuit being configured to change at least one detection parameter of the at least one detection circuit;
at least one heat frequency unit which comprises a plurality of damping capacitors connected in series and is configured to supply the at least one induction heating element;
a control unit configured to determine at least one cooking utensil parameter as a function of a natural frequency change of the at least one detection circuit;
at least one power current supply unit which is configured to supply the at least one induction heating element; and
at least one sensor current supply unit which is configured supply the at least one detection circuit and is embodied separately from the at least one power currently supply unit.

2. The induction hob device of claim 1 , further comprising a circuit unit which is arranged between the at least one heat frequency unit and the at least one induction heating element, wherein said at least one detection circuit diverges from a connection between the at least one heat frequency unit and the at least one induction heating element.

3. The induction hob device of claim 1 , further comprising at least one protection unit adapted to protect the at least one detection circuit from external voltages irrespective of an operating state.

4. The induction hob device of claim 2 , further comprising at least one protection unit adapted to protect the at least one detection circuit from external voltages irrespective of an operating state, said at least one protection unit being connected, irrespective of an operating state, between an input of the at least one detection circuit and a divergence from the connection between the at least one heat frequency unit and the at least one induction heating element.

5. The induction hob device of claim 3 , wherein the at least one protection unit has at least one capacitor.

6. The induction hob device of claim 1 , wherein the at least one detection circuit and the at least one induction heating element form an oscillating circuit at least in one operating state.

7. The induction hob device of claim 1 , wherein the at least one detection circuit is configured to detect a presence of the cooking utensil outside of a heating operating state.

8. An induction hob, comprising at least one induction hob device, said at least one induction hob device comprising at least one induction heating element adapted to heat a cooking utensil, at least one detection circuit cooperating with the at least one induction heating element to detect a presence of the cooking utensil, said at least one detection circuit being directly connected to the at least one induction heating element irrespective of an operating state, at least one sensor current supply unit configured to supply the at least one detection circuit with a detection current, at least one heat frequency unit which comprises a plurality of damping capacitors connected in series and is configured to supply the at least one induction heating element, a control unit configured to determine at least one cooking utensil parameter as a function of a natural frequency change of the at least one detection circuit, at least one power current supply unit which is configured to supply the at least one induction heating element, and at least one sensor current supply unit which is configured supply the at least one detection circuit and is embodied separately from the at least one power currently supply unit.

9. The induction hob of claim 8 , further comprising a circuit unit which is arranged between the at least one heat frequency unit and the at least one induction heating element, wherein said at least one detection circuit diverges from a connection between the at least one heat frequency unit and the at least one induction heating element.

10. The induction hob of claim 8 , wherein the at least one induction hob device includes at least one protection unit adapted to protect the at least one detection circuit from external voltages irrespective of an operating state.

11. The induction hob device of claim 9 , wherein the at least one induction hob device includes at least one protection unit adapted to protect the at least one detection circuit from external voltages irrespective of an operating state, said at least one protection unit being connected, irrespective of an operating state, between an input of the at least one detection circuit and a divergence from the connection between the at least one heat frequency unit and the at least one induction heating element.

12. The induction hob of claim 10 , wherein the at least one protection unit has at least one capacitor.

13. The induction hob of claim 8 , wherein the at least one detection circuit and the at least one induction heating element form an oscillating circuit at least in one operating state.

14. The induction hob of claim 8 , wherein the at least one detection circuit is configured to detect a presence of the cooking utensil outside of a heating operating state.

15. A method for operating an induction hob device, comprising:
directly connecting at least one detection circuit of the induction hob device to at least one induction heating element of the induction hob device irrespective of an operating state;
supplying the at least one induction heating element through at least one power current supply unit;
supplying the detection circuit through at least one sensor current supply unit which is embodied separately from the at least one power current supply unit supplying the at least one induction heating element, the at least one sensor current supply unit supplies the at least one detection circuit with a detection current; and
detecting the presence of a positioned cooking utensil as a result of a cooperation of the at least one detection circuit with the at least one induction heating element.

16. The method of claim 15 , further comprising supplying the at least one induction heating element via at least one heat frequency unit which is part of the at least one power current supply unit, and diverging the at least one detection circuit from a connection between the at least one heat frequency unit and the at least one induction heating element.

17. The method of claim 15 , further comprising protecting the at least one detection circuit from external voltages irrespective of an operating state.

18. The method of claim 15 , further comprising connecting at least one protection unit adapted to protect the at least one detection circuit from external voltages irrespective of an operating state, between an input of the at least one detection circuit and a divergence from a connection between an at least one heat frequency unit and the at least one induction heating element irrespective of an operating state.

19. The method of claim 18 , further comprising providing the at least one protection unit with at least one capacitor.

20. The method of claim 15 , further comprising forming an oscillating circuit at least in one operating state jointly by the at least one detection circuit and the at least one induction heating

Assignees

• Bsh Hausgeraete Gmbh

Inventors

• Blasco Rueda Nicolas
• Garcia-Izquierdo Gango Oscar
• Garde Aranda Ignacio
• Gracia Campos Oscar
• Hernandez Blasco Pablo Jesus
• Palacios Tomas Daniel

Classifications

• H05B2213/03

  Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate · CPC title

• H05B2213/05

  Heating plates with pan detection means · CPC title

• H05B6/06 Primary

  Control, e.g. of temperature, of power · CPC title

• H05B6/062 Primary

  for cooking plates or the like · CPC title

• F24C7/088

  on stoves · CPC title