Method for producing food by induction heating equipment and induction heating equipment
A technology of induction heating equipment and induction heating coils, which is applied in the direction of induction heating control, induction heating, induction heating devices, etc., and can solve problems such as difficulties in boiling point detection
Active Publication Date: 2016-02-17
E G O ELEKTRO GERAETEBAU GMBH
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Problems solved by technology
This makes detection of boiling point very difficult
Method used
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[0023] figure 1 Schematically shows an induction heating device 9 with a resonant circuit 4 with an induction heating coil 1 and capacitors 2 and 3, a power stage 7 controlled by a control device 8, typically with a mains frequency of for example 50 Hz rectified low-frequency mains AC voltage UN, And subsequently, it is converted by a semiconductor switch (not shown) into a rectangular voltage UR having a frequency ranging from 20 kHz to 50 kHz, wherein said rectangular voltage UR is applied to said resonant circuit 4 or its induction coil 1 in order to provide The heating power is supplied by the ferromagnetic bottom of the cooking vessel 5 and the device 10 is used to measure the energy supplied to the cooking vessel 5 containing water 6 into which water and rice 10 are placed in a 2:1 ratio.
[0024] Capacitors 2 and 3 usually form a series circuit between the UZK+ and UZK− poles of the intermediate circuit voltage, the connection node of capacitors 2 and 3 being connected ...
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Preparing food products which are cooked in a liquid (6) present in a cooking vessel (5) by an induction heating device (9) having a resonant circuit (4) with an induction heating coil (1), comprises: continuously determining a parameter value of the resonant circuit, preferably a period of time of a self-resonant oscillation of the resonant circuit; subjecting the resonant circuit with a high frequency square wave voltage; detecting a change of the parameter value within the period; evaluating the determined change of the parameter value; and terminating the heating phase. Preparing food products which are cooked in a liquid (6) present in a cooking vessel (5) by an induction heating device (9) having a resonant circuit (4) with an induction heating coil (1), comprises: continuously determining a parameter value of the resonant circuit, preferably a period of time of a self-resonant oscillation of the resonant circuit, which depends on a temperature of the cooking vessel, preferably cooking vessel base; subjecting the resonant circuit with a high frequency square wave voltage for supplying heating power to the cooking vessel, preferably to cooking vessel base, having a heating setpoint value, during the heating phase, where the heating setpoint value is changed periodically, and the heating setpoint value is set for a first duration to a first value within a period, and is set during the remaining duration of a second, smaller value; detecting a change of the parameter value within the period; evaluating the determined change of the parameter value to determine the boiling point of the liquid; and terminating the heating phase when the boiling point has been identified. An independent claim is also included for an induction heating device comprising a resonant circuit with induction heating coil and a control device.
Description
technical field [0001] The present invention relates to a method for preparing a food product cooked in a liquid contained in a cooking vessel by means of an induction heating device, and an induction heating device for carrying out the method. Background technique [0002] In an induction heating device, an alternating magnetic field is generated by an induction heating coil, which induces eddy currents in the cooking vessel to be heated and has a bottom made of ferromagnetic material, and losses due to magnetization reversal, as As a result the cookware is heated. [0003] The induction heating coil is part of a resonant circuit comprising the induction heating coil and one or more capacitors. Induction heating coils are usually designed as flat, helically wound coils with associated ferrite cores and are arranged, for example, under the glass-ceramic surface of an induction hob. In this case, the induction heating coil in combination with the cookware being heated forms...
Claims
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IPC IPC(8): H05B6/06H05B6/12A23L5/10
CPCH05B6/062H05B2213/07
Inventor W·席林C·埃根特W·卡佩斯S·韦斯特里希
Owner E G O ELEKTRO GERAETEBAU GMBH