Patent ID: 9451657
Filing Date: 2016-09-20
CPC Classification: H05B

Claim Text:
1. A method for heating a liquid, which is 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 naturally resonant oscillation of the resonant circuit, and wherein the parameter value depends on a temperature of a base of the cooking vessel; applying a radio-frequency square-wave voltage to the resonant circuit such that a heating power is supplied to the base of the cooking vessel at a heating power setpoint value; evaluating a time profile of the parameter value to determine a boiling point of the liquid; after the boiling point of the liquid has been determined, reducing the heating power setpoint value by a predefined amount over a predefined time period, wherein the predefined amount being reduced to a range of 10% to 50% of a maximum heating power setpoint value; after the predefined time period has elapsed, determining and storing a current parameter value; and adjusting the heating power setpoint value based on the stored current parameter value.