Patent ID: 9491807
Filing Date: 2016-11-08
CPC Classification: H05B

Claim Text:
1. A method for preparing foodstuffs, which are cooked in a liquid contained in a cooking vessel, utilizing an induction heating device, the method comprising: continuously determining a parameter value of a resonant circuit of the induction heating device, the resonant circuit comprising an induction heating coil, wherein the parameter value comprises a period duration of a natural resonant oscillation of the resonant circuit, and wherein the parameter value depends on a temperature of a bottom of the cooking vessel; applying a high-frequency rectangular voltage to the resonant circuit during a heating-up phase such that a heating power to the bottom of the cooking vessel comprises a heating power setpoint that is periodically varied, wherein within a first interval of a period of the heating power setpoint a first value is set, and a second value smaller than the first value is set within a remaining interval of the period of the heating power setpoint; determining a change in the parameter value within the period; evaluating the change in the parameter value to determine a boiling point of the liquid; in response to determining the boiling point of the liquid, terminating the heating-up phase; initiating a simmering phase after terminating the heating-up phase by terminating the simmering phase when the parameter value changes by more than the specified amount within the monitoring period.