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EP2506664B1 - Dispositif d'appareil de cuisson - Google Patents

Dispositif d'appareil de cuisson Download PDF

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Publication number
EP2506664B1
EP2506664B1 EP12158075.7A EP12158075A EP2506664B1 EP 2506664 B1 EP2506664 B1 EP 2506664B1 EP 12158075 A EP12158075 A EP 12158075A EP 2506664 B1 EP2506664 B1 EP 2506664B1
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EP
European Patent Office
Prior art keywords
frequency
obj
unit
heating
heat
Prior art date
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Application number
EP12158075.7A
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German (de)
English (en)
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EP2506664A1 (fr
Inventor
Jose Maria De La Cuerda Ortin
Oscar Gracia Campos
Ignacio Millan Serrano
Paul Muresan
Ramon Peinado Adiego
David Valeau Martin
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL12158075T priority Critical patent/PL2506664T3/pl
Publication of EP2506664A1 publication Critical patent/EP2506664A1/fr
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Publication of EP2506664B1 publication Critical patent/EP2506664B1/fr
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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
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils

Definitions

  • the invention is based on a cooking device device according to the preamble of claim 1.
  • the publication EP 1 951 003 A1 discloses an induction hob having at least two heating frequency units operated according to a particular method to at least substantially avoid intermodulation noise. According to this method, both heating-frequency units are operated at an identical and fixed first frequency in a first time interval. In a second time interval, a heating frequency unit is switched off, while the other heating frequency unit is operated at a fixed second frequency. The two frequencies as well as the relative lengths of the two time intervals are adjusted so that an average output power of each heating frequency unit corresponds to a target power selected by an operator.
  • the object of the invention is, in particular, to provide a cooking appliance device of the generic type which enables an advantageously flexible and easily implementable setting of an average output power.
  • the object is achieved by the features of claim 1 and the method claim 8, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the invention is based on a cooking device device with at least one first and at least one second heating frequency unit and with at least one control unit which is provided to operate the first heating frequency unit continuously with a fixed first frequency and to operate the second heating frequency unit in at least a first time interval and switch off in at least a second time interval.
  • control unit be provided to operate the second heating frequency unit in the first time interval with at least one frequency which differs from the first frequency by at least 15 kHz, preferably at least 16 kHz and particularly advantageously at least 17 kHz. It can be provided in particular to operate the second heating frequency unit in the first time interval with a changing frequency. Preferably, however, it is provided to operate the second heating frequency unit in the first time interval with a fixed frequency, which differs particularly advantageously by exactly 17 kHz from the first frequency.
  • the first frequency preferably corresponds to a nominal frequency of the first heating frequency unit for a given nominal power.
  • a "target frequency" is to be understood in particular a frequency which supplies the desired power as output power during operation of the heating frequency unit with this frequency.
  • An "output power" of one of the at least two heating-frequency units should in particular be understood to mean a power which is supplied by the heating-frequency unit in at least one heating operating state.
  • the cooking device device is preferably designed as a hob device and particularly advantageously as an induction hob device.
  • a "first time interval” and a “second” time interval are to be understood as meaning, in particular, two temporally successive time intervals of a length greater than 0.
  • the designations "first" and “second” time intervals are intended exclusively for distinguishing the time intervals and, in particular, no statement about a time interval
  • the term "provided” should in particular be understood to mean specially programmed and / or designed and / or equipped.
  • a “heating frequency unit” should in particular be understood to mean an electrical unit which generates an oscillating electrical current, preferably with a frequency of at least 15 kHz, in particular of at least 17 kHz and advantageously of at least 20 kHz, for operation of at least one heating unit.
  • a “heating unit” is to be understood in particular as meaning a unit which is intended to convert electrical energy into heat, at least to a large extent, and thus in particular to heat a food to be cooked.
  • the heating unit comprises a radiant heater, a resistance heater and / or preferably an induction heater, which is intended to convert electrical energy into heat indirectly via induced eddy currents.
  • the heating frequency unit comprises in particular at least one inverter, which preferably comprises two switching units.
  • a “switching unit” is to be understood in particular as meaning a unit which is intended to interrupt a conduction path comprising at least part of the switching unit.
  • the switching unit is a bidirectional unipolar switch which in particular allows a current flow through the switch along the conduction path in both directions and in particular short-circuits an electrical voltage in at least one polarity direction.
  • the inverter comprises at least two bipolar transistors with insulated gate electrode and particularly advantageously at least one damping capacitor.
  • a “conduction path” is to be understood as meaning, in particular, an electrically conductive conductor piece between two points.
  • electrically conductive is to be understood in particular with a specific electrical resistance of at most 10 -4 ⁇ M, in particular of at most 10 -5 ⁇ m, advantageously of at most 10 -6 ⁇ m and particularly advantageously of not more than 10 -7 ⁇ m at 20 ° C.
  • control unit is to be understood in particular as meaning an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooking appliance, in particular an induction hob, and which preferably has an arithmetic unit and in particular in addition to the arithmetic unit a storage unit with a stored therein
  • Control program includes.
  • the control unit is provided to control and / or regulate the heating frequency units by means of control signals and preferably electrical control signals.
  • a "control signal” should be understood in particular to mean a signal which, in particular in at least one operating state, triggers a switching operation of a heating frequency unit, in particular also indirectly.
  • an “electrical control signal” is intended in particular to mean a control signal having an electrical potential of at most 30 V, preferably of at most 20 V, particularly advantageously at most 10 V and in particular at least 0.5 V, based on a reference potential.
  • the control signal has a periodicity at least at times, in particular with a period of at most 1 ms, in particular of at most 0.1 ms and advantageously of at most 0.05 ms.
  • the control signal is at least substantially a rectangular signal, which in particular has two discrete values, preferably a switch-on value and a switch-off value.
  • each of the two values corresponds to a switching position of the heating frequency units and in particular their inverter.
  • a "frequency" of a heating frequency unit is to be understood in particular as the frequency of the control signal controlling the heating frequency unit.
  • a heating frequency unit is "operated” should be understood in particular that the frequency of the heating frequency unit is different from zero.
  • a heating frequency unit is operated “continuously” should be understood in particular that the heating frequency unit is operated continuously during a heating mode, wherein the non-zero frequency of the control signal can change.
  • the fact that a heating frequency unit is operated with a "fixed” frequency should in particular be understood to mean that the heating frequency unit is operated with a frequency that is at least substantially constant during a heating mode.
  • An “at least largely immutable frequency” should be understood in particular to mean a frequency which during the heating mode has a fluctuation of at most 10%, in particular of at most 5%, preferably of at most 1% and particularly advantageously of 0%.
  • a "output power that is at least substantially insignificant in the relevant time interval” should be understood as meaning, in particular, an output power which is at most 100 W, in particular at most 50 W, preferably at most 25 W and particularly advantageously 0 W and / or which is delivered in the time interval exclusively during a period which corresponds to at most 50%, in particular at most 25%, preferably at most 15% and particularly advantageously at most 10% of a length of the time interval.
  • the control unit is provided to control and / or regulate the at least two heating frequency units by means of the control signals in such a way that an average output power of one of the at least two heating frequency units corresponds at least largely to a nominal power selected by an operator.
  • a relative deviation of the set by the control unit average output power of the target power should be at most 20%, preferably at most 10% and more preferably at most 5%.
  • a "mean output power" is to be understood in particular a time-averaged output power.
  • the control unit is in particular provided to make an adjustment of the average output power to the desired power while largely avoiding Intermodulationsge syndromeschen.
  • intermodulation noises with a frequency of less than 17 kHz, in particular less than 16 kHz and preferably less than 15 kHz at a distance of 1 m from the cooking appliance device a sound pressure level of at most 20 dB, in particular of at most 10 dB, preferably of at most 5 dB, and particularly advantageously have a maximum of 0 dB.
  • the intermodulation sounds are inaudible by an average hearing operator.
  • an advantageously flexible adjustment of the average output powers of the heating frequency units can be achieved, in particular since the frequency of the second heating frequency unit can be chosen to be greater or smaller than the first frequency.
  • an easy implementation of the control method can be achieved, in particular by means of software.
  • an operation of both Schufrequenzüen be achieved with the required target performance under at least largely avoiding Intermodulationsge syndromeschen.
  • a simple scalability of the at least two heating frequency units can be made possible on any number of heating frequency units.
  • the control unit is provided for periodically operating the at least two heating frequency units with a period that corresponds to a sum of a length of the first time interval and a length of the second time interval.
  • the control unit for the case that a frequency difference between a minimum of a desired power associated target frequency and a second smallest of a desired power associated target frequency is at least 17 kHz, provided to operate the Schufrequenzong with the smallest nominal frequency continuously with the fixed first frequency. It is then preferably provided to operate at least one further heating frequency unit in the first time interval with a frequency which is at least 15 kHz, in particular at least 16 kHz, preferably at least 17 kHz and particularly advantageously at a frequency which is exactly 17 kHz higher. In this way, a high level of operating comfort can be achieved since a difference between an output power of one of the at least two heating frequency units and a setpoint power can be minimized.
  • control unit in the event that a frequency difference between a minimum nominal power associated target frequency and a second smallest target power associated target frequency is less than 17 kHz, is provided to the heating frequency unit with the second smallest nominal frequency continuously at the fixed first frequency to operate.
  • it is then provided to operate at least one further heating frequency unit in the first time interval with a frequency which is at least 17 kHz and preferably at a frequency which is exactly 17 kHz smaller.
  • control unit is provided to control and / or regulate the at least two heating frequency units in each case by means of a control signal and to adapt a duty cycle of at least one of the control signals in at least one operating state.
  • a ratio of a time duration in which the control signal assumes the switch-on value within a period duration to the period duration of the control signal is to be understood as a "duty cycle”.
  • an output of the heating frequency unit can be changed.
  • control unit is intended to "adjust a duty cycle of at least one of the control signals"
  • control unit is intended to change the duty cycle of at least one of the control signals, thereby changing a fixed output power Frequency of a heating frequency unit.
  • the control unit is provided to adjust the duty cycle to minimize a patch characteristic.
  • a “flicker characteristic” is to be understood in particular as a parameter that represents a measure of flicker.
  • flicker is meant, in particular, a subjective impression of an instability of a visual perception, which is caused in particular by a light stimulus whose luminance and / or spectral distribution varies with time.
  • flicker can be caused by a voltage drop of a mains voltage.
  • the patch characteristic is an overall output power difference, preferably between two time points of two time intervals and particularly advantageously two adjacent time intervals. Under a “total output” is in particular a Sum of the output powers of all heating-frequency units at a given time.
  • a “total output power difference” is to be understood in particular as a difference of the total output powers at two different points in time.
  • the control unit is provided to lower the flicker characteristic below a threshold.
  • the limit value is preferably a value defined by at least one statutory requirement and / or standard, in particular the standard DIN EN 61000-3-3. As a result, ease of use can be increased particularly advantageous and legal requirements and / or standards can be met.
  • the cooking device device comprises at least a third heating frequency unit and that the control unit is provided in at least one operating state to at least temporarily switch off the third heating frequency unit.
  • the control method according to the invention for a cooking device device with more than two heating frequency units and in particular to a cooking appliance device for a matrix hob can be scaled.
  • a "matrix cooktop" is to be understood, in particular, as a cooktop in which heating units are arranged in a regular grid under a cooktop panel, and a region of the cooktop panel which can be heated by means of the heating units is preferably at least 60%, in particular at least 70%, advantageously at least 80%. and particularly advantageously comprises at least 90% of a total area of the hob plate.
  • the matrix cooktop comprises at least 10, in particular at least 20, advantageously at least 30 and particularly advantageously at least 40 heating units.
  • control unit is provided for operating the third heating frequency unit at least partially simultaneously with the second heating frequency unit and at the same frequency as the second heating frequency unit.
  • intermodulation noises can be at least largely avoided, in particular with any number of simultaneously operated heating frequency units.
  • a method is proposed with a cooking device device with at least one first and at least one second heating frequency unit, in which the first heating frequency unit is operated continuously at a fixed first frequency and the second heating frequency unit is operated in at least a first time interval and switched off in at least a second time interval, wherein the second heating frequency unit is operated in the first time interval with at least one frequency which differs from the first frequency at least by 15 kHz, preferably by at least 16 kHz and particularly advantageously by at least 17 kHz.
  • an advantageously flexible adjustment of the average output power of the heating frequency units can be achieved.
  • easy implementation of the control method can be achieved.
  • an operation of both heating frequency units with the required setpoint power can be achieved with at least largely avoiding intermodulation noise.
  • a cooking appliance in particular a hob, proposed with a Garellavorraum invention.
  • the hob is an induction hob.
  • FIG. 1 shows a trained as induction hob 16a cooking appliance.
  • the induction hob 16a comprises a hob plate 18a, in particular of a glass ceramic, on which two heating zones 20a, 22a are marked in a known manner.
  • the hob plate 18a is horizontally disposed in an operative state of the induction hob 16a and provided for setting up cooking utensils.
  • touch-sensitive operating elements 26a and display elements 28a of an operating and display unit 30a of the induction hob 16a are marked in a known manner on the hob plate 18a.
  • the induction hob 16a further comprises a cooking appliance device having a first and a second heating frequency unit 10a, 12a arranged below the hob plate 18a and with a control unit 14a arranged below the hob plate 18a.
  • a cooking appliance device having a first and a second heating frequency unit 10a, 12a arranged below the hob plate 18a and with a control unit 14a arranged below the hob plate 18a.
  • FIG. 1 are components which are arranged below the hob plate 18a, drawn schematically and dashed, with functional relationships are indicated by arrows.
  • the control unit 14a is integrated in a control and regulation unit 32a of the induction hob 16a.
  • An induction heating unit associated with and located below the heating zone 20a is energized by the first heating frequency unit 10a.
  • An induction heating unit associated with and located below the heating zone 22a is energized by the second heating frequency unit 12a.
  • the control unit 14a is provided to adapt a respective average output power P ave1 , P ave2 of the heating frequency units 10a, 12a to the desired powers P obj1 , P obj2 while largely avoiding intermodulation noise, so that the selected heating levels of the heating zones 20a, 22a can be achieved.
  • the control unit 14a controls the first heating frequency unit 10a by means of a control signal V 1 (t) and the second heating frequency unit 12a by means of a control signal V 2 (t).
  • FIG. 2 shows by way of example a not to scale control signal V 2 (t) of the second heating frequency unit 12a in a Cartesian coordinate system.
  • An ordinate axis 36 has a control voltage V 2 and an abscissa axis 38 applied a time t.
  • the control signal V 2 (t) is during a first time interval T A a period T a square wave signal with a switch-V 0 and a switch-off of 0 volts.
  • the switch-on value V 0 is held during a switch-on time t 0 .
  • the square wave signal has a period T 0th During a period of time (T 0 -t 0 ), the turn-off value is held.
  • a frequency f 2 of the control signal V 2 (t) is calculated from a reciprocal of the period T 0 .
  • the frequency f 2 is usually between 20 kHz and 100 kHz.
  • a duty cycle D 2A of the control signal V 2 (t) is calculated from a quotient of the switch-on time t 0 divided by the period T 0 . While V 2 (t) takes the form of the square wave signal, a first of two switching units of the second heating frequency unit 12 a is periodically switched in accordance with a periodic change of the turn-on value V 0 and the turn-off value.
  • a second switching unit of the second heating frequency unit 12a is periodically switched in an analogous but time-shifted manner, so that a high-frequency alternating current results in an operation of the induction heating unit assigned to the heating zone 22a.
  • the control signal V 2 (t) is identical to zero.
  • a time x separates the first time interval T A and the second time interval T B. After the period T has elapsed, the control signal V 2 (t) is repeated.
  • FIG. 3a shows in a Cartesian coordinate system by way of example two not-to-scale power frequency curves P 1 (f) and P 2 (f).
  • output powers P 1 and P 2 of the heating frequency units 10a, 12a are plotted.
  • the frequency f is plotted.
  • the target powers P obj1 and P obj2 of the heating frequency units 10a, 12a are set by an operator.
  • a frequency spacing of the nominal powers P obj1 and P obj2 associated setpoint frequencies f obj1 and f obj2 of the heating frequency units 10a, 12a is at least 17 kHz.
  • the first heating frequency unit 10a has the smallest nominal frequency f obj1 assigned to the desired powers P obj1 , P obj2 .
  • This is then operated by the control unit 14a continuously with a fixed first frequency f 1, that of the target power P obj1 associated nominal frequency f obj1 equivalent.
  • the second heating frequency unit 12a is operated by the control unit 14a in the first time interval T A with a frequency f 2 which is 17 kHz higher. Since the output power P 2 of the second heating frequency unit 12a at the frequency f 2 exceeds the target power P obj2 of the second heating frequency unit 12a, the second heating frequency unit 12a is switched off in the second time interval T B.
  • FIG. 3b shows in a Cartesian coordinate system by way of example two not-to-scale power-time curves P 1 (t) and P 2 (t) for the in FIG. 3a described case.
  • On an ordinate axis 46 the output powers P 1 and P 2 of the Schufrequenztechniken 10a, 12a applied.
  • the time t is plotted on an abscissa axis 48.
  • An in FIG. 3b illustrated course of the power-time curves P 1 (t) and P 2 (t) is in a heating operation state of the heating-frequency units 10 a, 12 a periodically through the period T.
  • the control unit 14a calculates the lengths of the time intervals T A and T B of the period T so that the average output power P ave2 of the second heating frequency unit 12a corresponds to the desired power P obj2 .
  • FIG. 4a shows in a Cartesian coordinate system by way of example two not-to-scale power frequency curves P 1 (f) and P 2 (f).
  • output powers P 1 and P 2 of the heating frequency units 10a, 12a are plotted.
  • the frequency f is plotted.
  • the target powers P obj1 and P obj2 of the heating frequency units 10a, 12a are set by an operator.
  • a frequency spacing of the nominal powers P obj1 and P obj2 associated desired frequencies f obj1 and f obj2 of the heating frequency units 10a, 12a is less than 17 kHz.
  • the first heating frequency unit 10a has the second smallest, that is to say the highest nominal frequency f obj1 assigned to the desired powers P obj1 , P obj2 here .
  • This is then operated by the control unit 14a continuously with a fixed first frequency f 1 , which corresponds to the target power P obj1 associated target frequency f obj1 .
  • the second heating frequency unit 12a is operated by the control unit 14a in the first time interval T A with a frequency f 2 lower by 17 kHz. Since the output power P 2 of the second heating frequency unit 12a at the frequency f 2 exceeds the target power P obj2 of the second heating frequency unit 12a, the second heating frequency unit 12a is switched off in the second time interval T B.
  • FIG. 4b shows in a Cartesian coordinate system by way of example two not-to-scale power-time curves P 1 (t) and P 2 (t) for the in FIG. 4a described case.
  • the output powers P 1 and P 2 of the heating frequency units 10a, 12a are plotted on an ordinate axis 54.
  • the time t is plotted on an abscissa axis 56.
  • An in FIG. 4b illustrated course of the power-time curves P 1 (t) and P 2 (t) is in a heating operation state of the heating-frequency units 10 a, 12 a periodically through the period T.
  • the calculation of the lengths of the time intervals T A and T B of the period T by the control unit 14 a is carried out as described above.
  • the output power P 2 of the second heating frequency unit 12 a is plotted.
  • the frequency f is plotted.
  • FIG. 6 shows in two Cartesian coordinate systems by way of example two non-to-scale total power-time curves.
  • On an ordinate axis 62 in each case the sum of the output powers P 1 + P 2 of the heating frequency units 10a, 12a applied.
  • On an abscissa axis 64 the time t is plotted during three periods T in each case.
  • the top of the two coordinate systems FIG. 6 FIG. 15 shows a case where the duty D 2A of the second heating frequency unit 12 a has a value d 1 .
  • FIG. 5 results in the frequency f 2 then an output P 2 of the second heating frequency unit 12a of P 2 (f 2 , d 1 ).
  • the effect can be achieved by adjusting a duty cycle D 1A of the control signal V 1 (t) of the first Schufrequenzaise 10a in the time interval T A and / or by adjusting a duty cycle D 1B of the control signal V 1 (T) of the first heating frequency unit 10a in the time interval T B, an adjustment of the output power P 1 are made.
  • an induction hob can also have more than two induction heating units, wherein in each case a plurality of induction heating units can each be connected to a heating frequency unit via a respective switching unit.
  • FIGS. 7a, b and 8a, b a further embodiment of the invention is shown.
  • the following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and functions on the description of the other embodiment and in particular FIG. 1 can be referenced.
  • the method described above can be easily extended to a cooking appliance device for an induction hob 16b with at least a first heating frequency unit 10b, a second heating frequency unit 12b and a third heating frequency unit.
  • Figure 7a shows in a Cartesian coordinate system, for example, three power-frequency curves P 1 (f), P 2 (f) and P 3 (f) which are not true to scale.
  • Output powers P 1 , P 2 and P 3 of the heating frequency units 10b, 12b are plotted on an ordinate axis 66.
  • the target powers P obj1 , P obj2 and P obj3 of the heating frequency units 10b, 12b are set by an operator.
  • the first heating frequency unit 10b is then operated by a control unit 14b of the cooking appliance device continuously with a fixed first frequency f 1 , which corresponds to the setpoint power P obj1 associated setpoint frequency f obj1 .
  • the second heating frequency unit 12b is controlled by the control unit 14b in a first time interval T A with a 17 kHz higher frequency f 2 operated. Since the output power P 2 of the second heating frequency unit 12b exceeds the nominal power P obj2 at the frequency f 2 , the second heating frequency unit 12b is switched off in a second time interval T B following the first time interval T A.
  • the third heating frequency unit is operated by the control unit 14b in a first time interval T A 'as well with the frequency f 2 . Since the output power P 3 of the third heating frequency unit at the frequency f 2 exceeds the setpoint power P obj3 , the third heating frequency unit is switched off in a second time interval T B 'following the first time interval T A
  • FIG. 7b shows in a Cartesian coordinate system by way of example three not-to-scale power-time curves P 1 (t), P 2 (t) and P 3 (t).
  • the output powers P 1 , P 2 and P 3 of the heating frequency units 10b, 12b are plotted on an ordinate axis 70.
  • the time t is plotted on an abscissa axis 72.
  • the calculation of the lengths of the time intervals T A , T B , T A 'and T B ' of the period T by the control unit 14 b is carried out as described in the previous embodiment. Like in the FIG. 7b shown, overlap the time intervals T A and T A 'at least partially.
  • FIG. 8a shows in a Cartesian coordinate system by way of example three not-to-scale power frequency curves P 1 (f), P 2 (f) and P 3 (f).
  • On an ordinate axis 74 are output powers P 1, P 2 and P 3 of the Schufrequenzillonen 10b, 12b applied.
  • the target powers P obj1 , P obj2 and P obj3 of the heating frequency units 10b, 12b are set by an operator.
  • the first heating frequency unit 10b has a second smallest nominal frequency f obj1 assigned to the nominal powers P obj1 , P obj2 , P obj3
  • the second heating frequency unit 12b has a smallest nominal frequency f associated with the nominal powers P obj1 , P obj2 , P obj3 obj2 on.
  • a frequency spacing between the smallest nominal frequency f obj1 and the second smallest nominal frequency f obj2 is less than 17 kHz.
  • the heating frequency unit 10b with the second smallest nominal frequency f obj1 in the present case, the first heating frequency unit 10b, is then operated by the control unit 14b continuously with a fixed first frequency f 1 , which corresponds to the target power P obj1 associated target frequency f obj1 .
  • the second heating frequency unit 12b is operated by the control unit 14b in the first time interval T A with a frequency f 2 lower by 17 kHz. Since the output power P 2 of the second heating frequency unit 12b at the frequency f 2 exceeds the setpoint power P obj2 , the second heating frequency unit 12b is switched off in the second time interval T B.
  • the third heating frequency unit is also operated by the control unit 14b in the first time interval T A 'at the frequency f 2 . Since the output power P, the target power P obj3 3 exceeds the third Schufrequenzappel at the frequency f 2, the third Schufrequenzappel in the second time interval is switched off T B '.
  • FIG. 8b shows in a Cartesian coordinate system by way of example three not-to-scale power-time curves P 1 (t), P 2 (t) and P 3 (t).
  • the output powers P 1 , P 2 and P 3 of the heating frequency units 10b, 12b are plotted on an ordinate axis 78.
  • the time t is plotted on an abscissa axis 80.
  • the calculation of the lengths of the time intervals T A , T B , T A 'and T B ' of the period T by the control unit 14 b is carried out as previously described. Like in the FIG. 8b shown, overlap the time intervals T A and T A 'at least partially.
  • an adaptation of duty D 1A , D 2A , D 3A and D 1B may be provided, in particular for minimizing a Flickerkennharide F.
  • the control method described with reference to the second embodiment is scalable from three heating frequency units to a plurality of Schufrequenzüen , For example, for a trained as a matrix cooktop induction hob.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)
  • Induction Heating Cooking Devices (AREA)

Claims (9)

  1. Dispositif d'appareil de cuisson comprenant au moins une première et au moins une deuxième unités de fréquence de chauffage (10a, 12a ; 10b, 12b) et comprenant au moins une unité de commande (14a ; 14b) qui est ménagée pour faire fonctionner la première unité de fréquence de chauffage (10a ; 10b) de manière continue et pour faire fonctionner la deuxième unité de fréquence de chauffage (12a ; 12b) pendant au moins un premier intervalle de temps (TA) et la mettre hors service pendant au moins un deuxième intervalle de temps (TB), l'unité de commande (14a ; 14b) étant ménagée pour faire fonctionner la deuxième unité de fréquence de chauffage (12a ; 12b) pendant le premier intervalle de temps (TA) avec au moins une fréquence (f2) qui se distingue au moins de 15 kHz d'une première fréquence (f1) de la première unité de fréquence de chauffage (10a ; 10b), caractérisé en ce que l'unité de commande (14a ; 14b) est ménagée pour faire fonctionner la première unité de fréquence de chauffage (10a ; 10b) de manière continue avec la première fréquence fixe (f1), l'unité de commande (14a ; 14b), au cas où un écart de fréquence entre une fréquence théorique (fobj1, fobj2) la plus petite attribuée à une puissance théorique (Pobj1, Pobj2) et une fréquence théorique (fobj1, fobj2) la deuxième plus petite attribuée à une puissance théorique (Pobj1, Pobj2) est inférieur à 17 kHz, étant ménagée pour faire fonctionner l'unité de fréquence de chauffage (10a, 12a ; 10b, 12b) avec la fréquence théorique (fobj1, fobj2) la deuxième plus petite de manière continue avec la première fréquence fixe (f1).
  2. Dispositif d'appareil de cuisson selon la revendication 1, caractérisé en ce que l'unité de commande (14a ; 14b), au cas où un écart de fréquence entre une fréquence théorique (fobj1, fobj2) la plus petite attribuée à une puissance théorique (Pobj1, Pobj2) et une fréquence théorique (fobj1, fobj2) la deuxième plus petite attribuée à une puissance théorique (Pobj1, Pobj2) est au moins de 17 kHz, est ménagée pour faire fonctionner l'unité de fréquence de chauffage (10a, 12a ; 10b, 12b) avec la fréquence théorique (fobj1, fobj2) la plus petite de manière continue avec la première fréquence fixe (f1).
  3. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de commande (14a ; 14b) est ménagée pour commander les au moins deux unités de fréquence de chauffage (10a, 12a ; 10b, 12b) respectivement au moyen d'un signal de commande (V1(t), V2(t)) et/ou les régler et, dans au moins un état de fonctionnement, d'adapter un rapport cyclique (D1A, D1B, D2A, D3A) d'au moins un des signaux de commande (V1(t), V2(t)).
  4. Dispositif d'appareil de cuisson selon la revendication 3, caractérisé en ce que l'unité de commande (14a ; 14b) est ménagée pour adapter les rapports cycliques (D1A, D1B, D2A, D3A) dans le but de minimiser une caractéristique de papillotement (F).
  5. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé par au moins une troisième unité de fréquence de chauffage.
  6. Dispositif d'appareil de cuisson selon la revendication 5, caractérisé en ce que l'unité de commande (14b), dans au moins un état de fonctionnement, est ménagée pour mettre hors service au moins momentanément la troisième unité de fréquence de chauffage.
  7. Dispositif d'appareil de cuisson selon la revendication 5 ou 6, caractérisé en ce que l'unité de commande (14b) est ménagée pour faire fonctionner au moins en partie la troisième unité de fréquence de chauffage en même temps que la deuxième unité de fréquence de chauffage (12b) et avec la même fréquence (f2) que la deuxième unité de fréquence de chauffage (12b).
  8. Procédé avec un dispositif d'appareil de cuisson comprenant au moins une première et au moins une deuxième unités de fréquence de chauffage (10a, 12a ; 10b, 12b), notamment selon l'une quelconque des revendications précédentes, dans lequel la première unité de fréquence de chauffage (10a ; 10b) est mise en fonction de manière continue et dans lequel la deuxième unité de fréquence de chauffage (12a ; 12b) est mise en fonction pendant au moins un premier intervalle de temps (TA) et est mise hors service pendant au moins un deuxième intervalle de temps (TB), la deuxième unité de fréquence de chauffage (12a ; 12b) étant mise en fonction pendant le premier intervalle de temps (TA) avec au moins une fréquence (f2) qui se distingue au moins de 15 kHz d'une première fréquence (f1) de la première unité de fréquence de chauffage (10a ; 10b), caractérisé en ce que la première unité de fréquence de chauffage (10a ; 10b) est mise en fonction de manière continue avec la première fréquence fixe (f1), l'unité de fréquence de chauffage (10a, 12a ; 10b, 12b), au cas où un écart de fréquence entre une fréquence théorique (fobj1, fobj2) la plus petite attribuée à une puissance théorique (Pobj1, Pobj2) et une fréquence théorique (fobj1, fobj2) la deuxième plus petite attribuée à une puissance théorique (Pobj1, Pobj2) est inférieur à 17 kHz, étant mise en fonction avec la fréquence théorique (fobj1, fobj2) la deuxième plus petite de manière continue avec la première fréquence fixe (f1).
  9. Appareil de cuisson, notamment plaque de cuisson, comprenant un dispositif d'appareil de cuisson selon l'une quelconque des revendications 1 à 7.
EP12158075.7A 2011-03-28 2012-03-05 Dispositif d'appareil de cuisson Active EP2506664B1 (fr)

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Publication number Priority date Publication date Assignee Title
EP2945461B1 (fr) * 2014-03-24 2017-05-10 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
JP6827163B2 (ja) * 2016-04-25 2021-02-10 パナソニックＩｐマネジメント株式会社 誘導加熱調理器

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* Cited by examiner, † Cited by third party
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ES2201937B1 (es) * 2003-11-03 2005-02-01 Bsh Electrodomesticos España, S.A. Procedimiento para el funcionamiento de un circuito convertidor.
DE102005021888A1 (de) * 2005-05-04 2007-02-15 E.G.O. Elektro-Gerätebau GmbH Verfahren und Anordnung zur Leistungsversorgung mehrerer Induktionsspulen bei einem Induktionsgerät
US20060289489A1 (en) * 2005-05-09 2006-12-28 Dongyu Wang Induction cooktop with remote power electronics
EP1951003B2 (fr) 2007-01-23 2022-11-16 Whirlpool Corporation Procédé de commande d'induction d'une plaque de cuisson et d'induction d'une plaque de cuisson adaptée à un tel procédé
TWI394547B (zh) * 2009-03-18 2013-05-01 Delta Electronics Inc 加熱裝置

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ES2564264T3 (es) 2016-03-21
PL2506664T3 (pl) 2016-08-31

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