| 摘要 |
A method and apparatus for preparing foodstuffs cooked in a liquid in a cooking vessel is provided. According to various aspects, an induction heating device includes a resonant circuit with an induction heating coil. A parameter value of the resonant circuit may be determined, depending on a temperature of a bottom of the vessel. During a heating-up phase, a high-frequency rectangular voltage may be applied to the resonant circuit to supply heating power to the bottom of the vessel. A heating power setpoint may be periodically varied and may be set to a first value during a first interval of a period, and set to a second, smaller value during a remaining interval. A determination of a change in the parameter value within the period may be made, and an evaluation of the change in order to determine the boiling point of the liquid and end the heating-up phase.
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