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US 6,633,023 B2Granted
Induction heating device for heating cooking vessels
AssigneeBrandt Cooking
InventorsRené Cornec, Didier Gouardo, Alain Roux
Life of this patent
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Abstract
An induction heating device for heating cooking vessels includes at least three concentric inductors and implements a step of heating a load. For a load covering at least three inductors, at least one intermediate inductor that is covered and that is determined in such a manner as to homogenize the input of heat to the load is not energized during the heating step. Applications of the device include domestic hot plates.
Claims14
An induction heating device for heating cooking vessels, said device comprising:
- a source of power;
- at least three concentric inductors that include a central inductor and two innermost peripheral inductors;
- and
- a switch that is connected between said source of power and said two innermost peripheral inductors that is arranged and adapted to selectively energize only one of said two innermost peripheral inductors when said central inductor is energized.
1 more element
An induction heating device for heating cooking vessels, said device comprising:
- at least three concentric inductors;
- control means for controlling said concentric inductors when heating a cooking vessel, wherein when a cooking vessel covers at least three of said concentric inductors, at least one intermediate inductor that is covered is not energized by said control means,
- means for sensing which of said concentric inductors is covered by a cooking vessel,
- wherein said means for sensing is further for successively energizing a plurality of sets of said concentric inductors, measuring the corresponding energy expended by said energization, and calculating at least one difference between said measured energies, the number of inductors covered by the sensed load being determined from the calculated difference or differences.
1 more element
Dependencies are inferred from the claim text.