EP2360989A1 - Wärmevorrichtung mit Funktion zur Erkennung der Position eines Lebensmittelbehälters - Google Patents

Wärmevorrichtung mit Funktion zur Erkennung der Position eines Lebensmittelbehälters Download PDF

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Publication number
EP2360989A1
EP2360989A1 EP11000712A EP11000712A EP2360989A1 EP 2360989 A1 EP2360989 A1 EP 2360989A1 EP 11000712 A EP11000712 A EP 11000712A EP 11000712 A EP11000712 A EP 11000712A EP 2360989 A1 EP2360989 A1 EP 2360989A1
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EP
European Patent Office
Prior art keywords
current
induction coil
inverter circuit
signal
detecting
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Granted
Application number
EP11000712A
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English (en)
French (fr)
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EP2360989B1 (de
Inventor
Yi-lan YANG
Cheng-Hsien Cho
Yin-Yuan Chen
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Delta Electronics Inc
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Delta Electronics Inc
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Publication date
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Publication of EP2360989A1 publication Critical patent/EP2360989A1/de
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Publication of EP2360989B1 publication Critical patent/EP2360989B1/de
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the present invention relates to a heating device, and more particularly to a heating device having a function of detecting a location of a foodstuff container.
  • heating devices such as gas stoves, infrared oven, microwave oven and electric stove are widely used to cook food. Different heating devices have their advantages or disadvantages. Depending on the food to be cooked, a desired heating device is selected.
  • the induction cooking stove Take an induction cooking stove for example.
  • electromagnetic induction is performed to produce eddy current, thereby heating a foodstuff container.
  • the heat quantity for heating the foodstuff container by the induction coil and the current magnitude of the induction coil are varied. For example, in a case that the area of the foodstuff container overlying the induction coil with respect to the area of the induction coil is very high (e.g. 95%), the heat quantity for heating the foodstuff container by the induction coil is high. In this situation, the reactive power of operating the induction coil and the current magnitude are both reduced.
  • the induction cooking stove needs to have a function for accurately detecting the location of the foodstuff container.
  • the conventional induction cooking stove uses a micro-control unit (MCU) to calculate a ratio of a root-mean-square (rms) value of an input current to a root-mean-square (rms) value of an induction coil current, thereby determining the proper location of the foodstuff container. Since the frequency of the induction coil current is high (e.g. 20k ⁇ 50kHz), the sampling rate should be high and the calculating amount and speed of the micro-control unit should be increased to calculate the root-mean-square value of the induction coil current. Since the calculating process is complicated, the fabricating cost of the induction cooking stove is increased.
  • MCU micro-control unit
  • a current transformer (CT) or a sense resistor is necessary for reducing the circuit magnitudes.
  • a current signal ratio is adjusted by an amplifying circuit, and then the reduced induction coil current and the reduced input current are sampled by a sampling circuit. Since the impedance matching of the amplifying circuit, the current transformer and the sampling circuit have respective tolerances and the current signals are readily interfered by noise, the current magnitude obtained by the micro-control unit has a large error, which is equal to the overall error resulted from the current transformer, the amplifying circuit and the sampling circuit. In this situation, the accuracy of determining the location of the foodstuff container is adversely affected by the noise.
  • the ratio of the root-mean-square value of an input current to the root-mean-square value of the induction coil current is acquired with undue experiments.
  • the accuracy of the ratio is usually unsatisfied.
  • the function of detecting the location of the foodstuff container may be implemented by a micro controller with slower calculating amount and speed.
  • Another object of the present invention provides a heating device having a function of detecting a location of a foodstuff container with high accuracy and reduced error.
  • a further object of the present invention provides a heating device capable of judging whether the components of the heating device is abnormal in order to overcome the problem of burning out the heating device.
  • a heating device having a function of detecting a location of a foodstuff container.
  • the heating device includes an induction coil, an inverter circuit, a first current-detecting circuit, a signal processing circuit and a controlling unit.
  • the induction coil is used for heating the foodstuff container.
  • the inverter circuit is used for receiving a rectified voltage and generating a driving voltage to drive the induction coil.
  • the first current-detecting circuit is serially connected with the induction coil for detecting a first current flowing through the induction coil, thereby generating a first current-detecting signal.
  • the signal processing circuit is connected to the first current-detecting circuit for generating a current phase signal according to the first current-detecting signal.
  • the controlling unit is used for generating at least a first control signal according to a cooking option, thereby controlling the inverter circuit. According to a duration difference or a phase difference between the first control signal and the current phase signal, the controlling unit determines an area of the foodstuff container overlying the induction coil with respect to an area of the induction coil or a location of the foodstuff container relative to the induction coil, thereby adjusting an operation of the inverter circuit.
  • a heating device having a function of detecting a location of a foodstuff container.
  • the heating device includes an induction coil, an inverter circuit, a first current-detecting circuit, a signal processing circuit and a controlling unit.
  • the induction coil is used for heating the foodstuff container.
  • the inverter circuit is used for receiving a rectified voltage, thereby generating a driving voltage to drive the induction coil.
  • the first current-detecting circuit is serially connected with the induction coil for detecting a first current flowing through the induction coil, thereby generating a first current-detecting signal.
  • the signal processing circuit is connected to the first current-detecting circuit for generating a current phase signal according to the first current-detecting signal.
  • the controlling unit is used for generating at least a first control signal according to a cooking option, thereby controlling the inverter circuit.
  • the controlling unit determines an area of the foodstuff container overlying the induction coil with respect to an area of the induction coil or a location of the foodstuff container relative to the induction coil, thereby adjusting an operation of the inverter circuit. If the duration difference or the phase difference between the first control signal and the current phase signal exceeds a predetermined range, the controlling unit judges that the location of the foodstuff container is improper or abnormal and controls the inverter circuit to be operated in a pan detection mode. In the pan detection mode, the inverter circuit is operated at an increased switching frequency or a reduced duty cycle, or the inverter circuit is disabled.
  • FIG 1 is a schematic circuit block diagram illustrating a heating device having a function of detecting a location of a foodstuff container according to an embodiment of the present invention
  • FIG 2A is a schematic view illustrating the location of the foodstuff container relative to the induction coil in the heating device of the present invention
  • FIG 2B is a schematic view illustrating another location of the foodstuff container relative to the induction coil in the heating device of the present invention.
  • FIG 3 is a timing waveform diagram schematically illustrating the corresponding current signals and control signal processed in the heating device of FIG. 1 .
  • FIG 1 is a schematic circuit block diagram illustrating a heating device having a function of detecting a location of a foodstuff container according to an embodiment of the present invention.
  • the heating device 1 includes a rectifier circuit 11, a filtering circuit 12, an inverter circuit 13, an induction coil 14, a first current-detecting circuit 15, a signal processing circuit 16, a controlling unit 17 and a user interface unit 18.
  • the rectifier circuit 11 is a bridge rectifier circuit.
  • An input voltage V in is rectified into a rectified voltage V r by the rectifier circuit 11.
  • the filtering circuit 12 is connected to an output terminal of the rectifier circuit 11.
  • the filtering circuit 12 is used for filtering off the high-frequency noise contained in the rectified voltage V r .
  • the filtering circuit 12 includes a filter capacitor C a .
  • the filtering circuit 12 may include plural inductors and plural capacitors (not shown).
  • the induction coil 14 is disposed inside a heating panel 10 for heating a foodstuff container 2.
  • the power input terminal of the inverter circuit 13 is connected to the filtering circuit 12.
  • the power output terminal of the inverter circuit 13, the induction coil 14 and the first current-detecting circuit 15 are connected with each other in series.
  • the inverter circuit 13 includes a first switch element Q 1 , a second switch element Q 2 , a first capacitor C 1 and a second capacitor C 2 .
  • the first switch element Q 1 and the second switch element Q 2 are connected with each other in series.
  • a first connecting node between the first switch element Q 1 and the second switch element Q 2 is connected to the first current-detecting circuit 15.
  • the first capacitor C 1 and the second capacitor C 2 are connected with each other in series.
  • a second connecting node between the first capacitor C 1 and the second capacitor C 2 is connected to a first terminal of the induction coil 14.
  • the first connecting node between the first switch element Q 1 and the second switch element Q 2 is served as a first power output terminal of the inverter circuit 13.
  • the second connecting node between the first capacitor C 1 and the second capacitor C 2 is served as a second power output terminal of the inverter circuit 13.
  • the control terminal of the first switch element Q 1 and the control terminal of the second switch element Q 2 are connected to the controlling unit 17. Under control of the controlling unit 17, the first switch element Q 1 and the second switch element Q 2 are conducted in an interleaved manner according to a first control signal S 1 and a second control signal S 2 . As such, an AC driving voltage V o is generated by the inverter circuit 13 to drive the induction coil 14.
  • the first switch element Q 1 In response to an enabling status of the first control signal S 1 and a disabling status of the second control signal S 2 , the first switch element Q 1 is conducted but the second switch element Q 2 is shut off. As such, the electric energy of the rectified voltage V r is transmitted to the induction coil 14 through the first switch element Q 1 and the second capacitor C 2 . In this situation, the driving voltage V o is equal to the positive component of the rectified voltage V r , so that the positive component of the rectified voltage V r is received by the induction coil 14. Whereas, in response to a disabling status of the first control signal S 1 and an enabling status of the second control signal S 2 , the first switch element Q 1 is shut off but the second switch element Q 2 is conducted.
  • the electric energy of the rectified voltage V r is transmitted to the induction coil 14 through the first capacitor C 1 and the second switch element Q 2 .
  • the driving voltage V o is equal to the negative component of the rectified voltage V r , so that the negative component of the rectified voltage V r is received by the induction coil 14.
  • the first current-detecting circuit 15 is a current transformer.
  • the primary side of the current transformer 15, the induction coil 14 and the power output terminal of the inverter circuit 13 are connected with each other in series.
  • the secondary side of the current transformer 15 is connected to the signal processing circuit 16.
  • the current transformer 15 is used for detecting the first current I 1 flowing through the induction coil 14.
  • the first current I 1 is reduced and a corresponding first current-detecting signal V s1 is generated.
  • the waveform, time sequence and phase of the first current-detecting signal V s1 are identical to those of the first current I 1 .
  • the signal processing circuit 16 is interconnected between the first current-detecting circuit 15 and the controlling unit 17. According to the first current-detecting signal V s1 , the signal processing circuit 16 issues a current phase signal Sp to the controlling unit 17.
  • the signal processing circuit 16 includes a comparing circuit. According to the first current-detecting signal V s1 , the comparing circuit outputs the current phase signal Sp. In a case that the first current I 1 is switched from a negative status to a positive status, the current phase signal Sp in an enabling status is issued from the comparing circuit to the controlling unit 17. Whereas, in a case that the first current I 1 is switched from the positive status to the negative status, the current phase signal Sp in a disabling status is issued from the comparing circuit to the controlling unit 17.
  • the comparing circuit compares the first current-detecting signal V s1 with a reference voltage (not shown). If the first current-detecting signal V s1 is greater than the reference voltage, the current phase signal Sp in the enabling status is issued from the comparing circuit to the controlling unit 17. Whereas, if the first current-detecting signal V s1 is smaller than the reference voltage, the current phase signal Sp in the disabling status is issued from the comparing circuit to the controlling unit 17.
  • the operating frequencies and the durations of the first control signal S 1 and an enabling status of the second control signal S 2 are adjusted.
  • the user's cooking option includes for example a powering off selective item, a powering on selective item, a heat quantity selective item, a heating time selective item, a fast heating selective item or a slow heating selective item.
  • the controlling unit 17 determines an area of the foodstuff container 2 overlying the induction coil 14 with respect to an area of the induction coil 14 or a location of the foodstuff container 2 relative to the induction coil 14, thereby adjusting an operation of the inverter circuit.
  • the duration difference or the phase difference between the second control signal S 2 and the current phase signal Sp is equal to the duration difference or the phase difference between the first control signal S 1 and the current phase signal Sp.
  • the controlling unit 17 determines an area of the foodstuff container 2 overlying the induction coil 14 with respect to an area of the induction coil 14 or a location of the foodstuff container 2 relative to the induction coil 14.
  • the user interface unit 18 is connected to the controlling unit 17 for receiving the user's cooking option and indicating the operating message.
  • the user's cooking option includes for example a powering off selective item, a powering on selective item, a heat quantity selective item, a heating time selective item, a fast heating selective item or a slow heating selective item.
  • the user interface unit 18 is a touch screen for implementing the user's cooking option.
  • the operating message is also shown on the touch screen.
  • the heating device 1 further includes a second current-detecting circuit 19.
  • the second current-detecting circuit 19 includes a detecting resistor R s .
  • the detecting resistor R s is interconnected between the filtering circuit 12 and the inverter circuit 13 for detecting a second current I 2 flowing through the inverter circuit 13, thereby generating a second current-detecting signal V s2 to the controlling unit 17.
  • the controlling unit 17 calculates the second current I 2 , which is relatively higher.
  • An example of the controlling unit 17 includes but is not limited to a pulse frequency modulation (PFM) controller, micro controller, a micro processor or a digital signal processor (DSP).
  • PFM pulse frequency modulation
  • DSP digital signal processor
  • Each of the first switch element and the second switch element is a metal oxide semiconductor field effect transistor (MOSFET), a bipolar junction transistor (BJT) or an insulated gate bipolar transistor (IGBT).
  • MOSFET metal oxide semiconductor field effect transistor
  • BJT bipolar junction transistor
  • IGBT insulated gate bipolar transistor
  • FIG 2A is a schematic view illustrating a location of the foodstuff container relative to the induction coil in the heating device of the present invention.
  • the foodstuff container 2 is placed over the middle portion of the induction coil 14.
  • the area of the foodstuff container 2 overlying the induction coil 14 with respect to the area of the induction coil 14 is very high.
  • the area of the foodstuff container 2 overlying the induction coil 14 (A1) is 95% of the area of the induction coil 14. Since the heat quantity for heating the foodstuff container 2 by the induction coil 14 is high, both of the reactive power of operating the induction coil 14 and the first current I 1 are relatively lower.
  • the duration difference or the phase difference between the first control signal S 1 and the current phase signal S p is within a predetermined range (e.g. 1 ⁇ s ⁇ 7 ⁇ s).
  • the controlling unit 17 will judge whether the area of the foodstuff container 2 overlying the induction coil 14 with respect to the area of the induction coil 14 or a location of the foodstuff container 2 relative to the induction coil 14 is suitable.
  • the controlling unit 17 controls the inverter circuit 13 to output the heat power or heat quantity set by the cooking option. Meanwhile, the maximum heat power or heat quantity outputted from the inverter circuit 13 is equal to the rated value.
  • FIG 2B is a schematic view illustrating another location of the foodstuff container relative to the induction coil in the heating device of the present invention.
  • the foodstuff container 2 is not completely placed over the middle portion of the induction coil 14.
  • the area of the foodstuff container 2 overlying the induction coil 14 with respect to the area of the induction coil 14 is very low.
  • the area of the foodstuff container 2 overlying the induction coil 14 (A2) is 15% of the area of the induction coil 14. Since the heat quantity for heating the foodstuff container 2 by the induction coil 14 is low, both of the reactive power of operating the induction coil 14 and the first current I 1 are increased in comparison with FIG 2A .
  • the controlling unit 17 will judge that the location of the foodstuff container 2 is improper or abnormal. Meanwhile, the controlling unit 17 controls the inverter circuit 13 to be operated in a pan detection mode. In the pan detection mode, the first switch element Q 1 and the second switch element Q 2 of the inverter circuit 13 are operated at a higher switching frequency or a lower duty cycle. Alternatively, the induction coil 14 is disabled in order to prevent from burning out the heating device 1 because the foodstuff container 2 is improperly or abnormally positioned or no foodstuff container 2 is placed on the induction coil 14.
  • the predetermined range e.g. > 7 ⁇ s
  • the duration difference or the phase difference between the first control signal S 1 (or the second control signal S 2 ) and the current phase signal Sp is within the predetermined range.
  • both of the reactive power of operating the induction coil 14 and the first current I 1 are increased.
  • the root-mean-square (rms) value of the second current I 2 or the second current-detecting signal V s2 will be smaller than a first current threshold value (e.g. 1A).
  • the heat power or heat quantity outputted by the inverter circuit 13 is reduced under control of the controlling unit 17. Meanwhile, the maximum heat power or heat quantity outputted from the inverter circuit 13 is lower than the rated value. That is, for complying with different sizes of foodstuff containers, the duration difference or the phase difference between the first control signal S 1 (or the second control signal S2) and the relation between the second current I 2 and the first current threshold value should be taken into consideration.
  • the controlling unit 17 judges that the duration difference or the phase difference between the first control signal S 1 (or the second control signal S2) and the current phase signal Sp is within the predetermined range and the second current I 2 is smaller than the first current threshold value, it is meant that a relatively smaller foodstuff container 2 is placed over the middle portion of the induction coil 14. In this situation, the heat power or heat quantity outputted by the inverter circuit 13 is reduced under control of the controlling unit 17, so that the maximum heat power or heat quantity outputted from the inverter circuit 13 is lower than the rated value.
  • the controlling unit 17 judges that the duration difference or the phase difference between the first control signal S 1 (or the second control signal S 2 ) and the current phase signal Sp is within the predetermined range and the second current I 2 is greater than the first current threshold value, it is meant that a normal-sized foodstuff container 2 is placed over the middle portion of the induction coil 14. In this situation, the controlling unit 17 controls the inverter circuit 13 to output the heat power or heat quantity set by the cooking option, so that the maximum heat power or heat quantity outputted from the inverter circuit 13 is equal to the rated value.
  • FIG 3 is a timing waveform diagram schematically illustrating the corresponding current signals and control signal processed in the heating device of FIG 1 .
  • the waveform and time sequence of the first current-detecting signal V s1 are identical to those of the first current I 1 . Since the current phase signal Sp is obtained by the signal processing circuit 16 according to the first current-detecting signal V s1 , the time sequence of the current phase signal S p is substantially identical to that of the first current I 1 .
  • the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal Sp is equal to the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the first current I 1 .
  • the controlling unit 17 may calculate the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the first current I 1 according to the current phase signal Sp.
  • the process of calculating the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal Sp is simplified because huge amount of sampling data is no loner needed.
  • the controlling unit 17 may be implemented by a micro controller with slower calculating amount and speed.
  • a timer (not shown) of the controlling unit 17 is activated to count time in response to the first control signal S 1 in the enabling status; and at a second time spot t 2 , the timer of the controlling unit 17 stops counting time in response to the current phase signal S p in the enabling status.
  • the duration difference (d) or the phase difference (d) between the first control signal S 1 and the current phase signal S p will be calculated without difficulty.
  • the first switch element Q 1 and the second switch element Q 2 are operated in a zero voltage switching (ZVS) manner.
  • ZVS zero voltage switching
  • the first switch element Q 1 and the second switch element Q 2 fail to be operated in the zero voltage switching (ZVS) manner.
  • the switching current is too large or the first current I 1 is largely increased.
  • the duration difference or the phase difference between the first control signal S 1 (or the second control signal S 2 ) and the current phase signal Sp is below the predetermined range (e.g. ⁇ 1 ⁇ s).
  • the duration difference or the phase difference between the first control signal S 1 (or the second control signal S 2 ) and the current phase signal Sp is below the predetermined range, it is meant that one or more components of the heating device 1 has a failure or is abnormal.
  • the heat power or heat quantity outputted by the inverter circuit 13 is reduced under control of the controlling unit 17. Meanwhile, the maximum heat power or heat quantity outputted from the inverter circuit 13 is lower than the rated value. Alternatively, the heating device 1 is disabled.
  • the heating device 1 determines the location of the foodstuff container 2 according to the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal S p .
  • the process of calculating the duration difference (d) or the phase difference (d) is simplified because huge amount of sampling data is no loner needed.
  • the controlling unit 17 may be implemented by a micro controller with slower calculating amount and speed. As such, the heating device 1 is cost-effective.
  • the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal Sp is increased.
  • the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal S p is reduced. Since the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal Sp is detectable by an instrument (e.g. an oscilloscope) without undue experiments.
  • the controlling unit 17 will calculate the duration difference (d) or the phase difference (d) between the control signal (S 1 or S 2 ) and the current phase signal S p according to the current phase signal S p .
  • the error of detecting the foodstuff container 2 is reduced, the possibility of being interfered by noise is reduced and the accuracy of detecting the foodstuff container 2 is enhanced.
  • the duration difference (d) or the phase difference (d) can be used to judge whether the components of the heating device is abnormal, the problem of burning out the heating device 1 is overcome.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
EP11000712.7A 2010-02-12 2011-01-28 Wärmevorrichtung mit Funktion zur Erkennung der Position eines Lebensmittelbehälters Active EP2360989B1 (de)

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TW099104841A TWI565366B (zh) 2010-02-12 2010-02-12 具偵測食材容器位置功能之加熱裝置

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EP2360989B1 EP2360989B1 (de) 2017-04-05

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EP2597929A1 (de) * 2011-11-28 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Gargerätvorrichtung
EP2704520A1 (de) * 2012-08-28 2014-03-05 Electrolux Home Products Corporation N.V. Induktionsheizgenerator und Induktionskochstelle
WO2014090874A1 (en) * 2012-12-12 2014-06-19 Arcelik Anonim Sirketi An induction heating cooktop
US20160174297A1 (en) * 2013-09-30 2016-06-16 Electrolux Appliances Aktiebolag A method and device for determining the suitability of a cookware for a corresponding induction coil of an induction cooking hob
EP3291643A1 (de) * 2016-09-01 2018-03-07 Samsung Electronics Co., Ltd. Kochvorrichtung und verfahren zur steuerung davon
EP3383131A1 (de) * 2017-03-27 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Induktionskochvorrichtung und -verfahren
EP3439429A1 (de) * 2017-08-04 2019-02-06 LG Electronics Inc. Induktionswärmekochvorrichtung und betriebsverfahren dafür
EP3920661A1 (de) * 2020-06-05 2021-12-08 E.G.O. Elektro-Gerätebau GmbH Verfahren zum betreiben eines induktionskochfelds und induktionskochfeld
WO2022013007A1 (de) * 2020-07-17 2022-01-20 BSH Hausgeräte GmbH Induktionskochfeldvorrichtung
EP4017215A1 (de) * 2020-12-17 2022-06-22 Techrein Co., Ltd Induktionsbereichsvorrichtung zur erkennung von behältern

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GB2183941A (en) * 1985-11-27 1987-06-10 Toshiba Kk Electromagnetic induction cooking apparatus capable of providing a substantially constant input power
JP2007335274A (ja) * 2006-06-16 2007-12-27 Mitsubishi Electric Corp 誘導加熱調理器
EP2034801A1 (de) * 2007-09-05 2009-03-11 Whirlpool Corporation Verbessertes Induktionskochgerät und Verfahren zum Überprüfen der Kochfähigkeit eines Kochgeschirrs
US20090321425A1 (en) * 2006-11-09 2009-12-31 Werner Meier Method for controlling an induction cooking appliance and induction cooking appliance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183941A (en) * 1985-11-27 1987-06-10 Toshiba Kk Electromagnetic induction cooking apparatus capable of providing a substantially constant input power
JP2007335274A (ja) * 2006-06-16 2007-12-27 Mitsubishi Electric Corp 誘導加熱調理器
US20090321425A1 (en) * 2006-11-09 2009-12-31 Werner Meier Method for controlling an induction cooking appliance and induction cooking appliance
EP2034801A1 (de) * 2007-09-05 2009-03-11 Whirlpool Corporation Verbessertes Induktionskochgerät und Verfahren zum Überprüfen der Kochfähigkeit eines Kochgeschirrs

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2597929A1 (de) * 2011-11-28 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Gargerätvorrichtung
EP2704520A1 (de) * 2012-08-28 2014-03-05 Electrolux Home Products Corporation N.V. Induktionsheizgenerator und Induktionskochstelle
WO2014032881A1 (en) * 2012-08-28 2014-03-06 Electrolux Home Products Corporation N. V. An induction heating generator and an induction cooking hob
CN104541573A (zh) * 2012-08-28 2015-04-22 伊莱克斯家用产品股份有限公司 感应热发生器和感应式烹饪灶台
AU2013307638B2 (en) * 2012-08-28 2016-12-08 Electrolux Home Products Corporation N. V. An induction heating generator and an induction cooking hob
CN104541573B (zh) * 2012-08-28 2017-09-22 伊莱克斯家用产品股份有限公司 感应热发生器和感应式烹饪灶台
US9788368B2 (en) 2012-08-28 2017-10-10 Electrolux Home Products Corporation Nv Induction heating generator and an induction cooking hob
WO2014090874A1 (en) * 2012-12-12 2014-06-19 Arcelik Anonim Sirketi An induction heating cooktop
CN105191489A (zh) * 2012-12-12 2015-12-23 阿塞里克股份有限公司 一种感应加热炉灶
US10159118B2 (en) * 2013-09-30 2018-12-18 Electrolux Appliances Aktiebolag Method and device for determining the suitability of a cookware for a corresponding induction coil of an induction cooking hob
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EP2360989B1 (de) 2017-04-05
TW201129256A (en) 2011-08-16
ES2627683T3 (es) 2017-07-31

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