EP2469970A2 - Cooking device - Google Patents
Cooking device Download PDFInfo
- Publication number
- EP2469970A2 EP2469970A2 EP11194218A EP11194218A EP2469970A2 EP 2469970 A2 EP2469970 A2 EP 2469970A2 EP 11194218 A EP11194218 A EP 11194218A EP 11194218 A EP11194218 A EP 11194218A EP 2469970 A2 EP2469970 A2 EP 2469970A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- heating
- unit
- control unit
- heating frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000010411 cooking Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 133
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000006698 induction Effects 0.000 description 22
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- 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 B1 discloses an induction hob with at least two heating frequency units operated according to a particular method to prevent intermodulation noises. According to this method, both heating-frequency units are operated at an identical first frequency in a first time period. In a second period of time, one heating frequency unit is switched off, while the other heating frequency unit is operated at a second frequency. The two frequencies as well as the relative lengths of the two time segments are adjusted so that a mean output power of each heating frequency unit corresponds to an operator selected heating power.
- the object of the invention is in particular to provide a generic Garellavorraum with a continuous power output possible.
- the object is achieved by the features of claim 1 and the method claim 9, while advantageous embodiments and refinements of the invention can be taken from the dependent claims.
- the invention is based on a cooking device device with at least two heating frequency units and with at least one control unit, which is provided to set a respective average output power of the heating frequency units while largely avoiding intermodulation noise.
- control unit be provided to set a non-zero frequency of one of the heating frequency units to one of zero while maintaining the operation of the other heating frequency unit
- the cooking device device is preferably designed as a hob device and particularly advantageously as an induction hob device.
- 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 1 kHz, in particular of at least 10 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 a unit which is intended to at least partially convert electrical energy into heat 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 indirectly via induced eddy currents into heat.
- 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.
- control unit is to be understood, in particular, as 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.
- the control unit comprises a computing unit and in particular in addition to the computing unit a memory unit with a stored therein Control program.
- the control unit is provided to control the heating frequency units by means of electrical control signals and / or to regulate.
- An electrical "control signal” is to be understood in particular a signal having an electrical voltage of at most 30 V, preferably of at most 20 V and more preferably of at most 10 V, which is supplied to the inverters of the heating frequency units in particular in at least one operating state.
- 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 a square-wave signal, which in particular can assume two values, preferably a switch-on value and a switch-off value.
- each of the two values corresponds to a switching position of the inverters.
- 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 “maintenance of an operation" of a heating frequency unit should in particular be understood as a continuation of the operation of the heating frequency unit with different or preferably the same, non-zero frequency.
- An “output power” is to be understood, in particular, as meaning an electrical power which, in at least one operating state, is transmitted from a heating frequency unit to a heating unit.
- the output power is transmitted by an electric current.
- the output power is preferably converted in the heating unit at least partially and particularly advantageously at least to a large extent into a heat flow.
- a “mean output power” is to be understood in particular a time-averaged output power.
- the control unit is provided to set the average output power such that one of a Operator selected heating power is achieved, in particular for each heating zone of a hob.
- a "substantial avoidance of intermodulation noise” should be understood in particular that intermodulation noises at a frequency of 17 kHz and smaller at a distance of 1 m from the cooking appliance a sound pressure level of at most 20 dB, in particular of at most 10 dB, preferably of at most 5 dB and particularly advantageous of a maximum of 0 dB.
- the intermodulation sounds are inaudible by an average hearing operator.
- a power output which is as continuous as possible can be achieved, in particular per heating frequency unit, since a temporary shutdown of a heating frequency unit can be dispensed with.
- any heating power selected by an operator may be adjusted.
- elimination of any intermodulation noise can be enabled.
- energy efficiency can be increased because operation of the heating frequency units close to a resonance frequency is enabled.
- the control unit is provided to operate at least one of the heating frequency units with a fixed frequency.
- the control unit is intended to "operate at least one of the heating frequency units with a fixed frequency” should be understood in particular that the control unit is provided to operate the heating frequency unit in a continuous mode with a control signal which the fixed frequency or operating the heating frequency unit in a pulsed mode, wherein the control signal has the fixed frequency during a pulse.
- a "continuous mode” is to be understood, in particular, as an operating mode of the heating frequency unit in which there is a maximum of one cycle duration between two switching operations of the heating frequency unit, which corresponds to the period duration of the control signal.
- a "pulsed mode” is to be understood, in particular, as an operating mode of the heating frequency unit in which at least one period exists between two switching operations of the heating-frequency units, which is at least 10 times, preferably at least 50 times and particularly advantageously at least 100 times greater than the period of the control signal.
- a control algorithm can advantageously be simplified.
- control unit is provided to operate the heating frequency unit which requires a highest frequency in order to achieve the average output power in a continuous operation at the fixed frequency.
- control unit is provided to operate the Kirfrequenzajien at least temporarily with a frequency difference of at least 15 kHz.
- control unit is provided to operate the Schufrequenzajien at least temporarily with a frequency difference of at least 16 kHz and more preferably of at least 17 kHz.
- control unit is intended to operate the heating frequency units with a frequency greater than 30 kHz.
- control unit is provided to operate the Schufrequenzüen with a frequency of greater than 32 kHz and particularly advantageously greater than 34 kHz. In this way, an audible intermodulation noise can be reduced particularly advantageous.
- control unit is provided to operate the two Schufrequenzüen at least temporarily with the same frequency. This can eliminate an audible intermodulation noise.
- control unit is provided to operate one of the heating frequency units at least temporarily with an at least substantially half the frequency of the other heating frequency unit.
- an "at least substantially half the frequency” is to be understood in particular a frequency which differs from one half of a reference frequency by at most 10%, in particular by more than 5%, and preferably by at most 2%, and which is particularly advantageously identical to half of the reference frequency Reference frequency is. In this way it can be ensured that a heating power selected by an operator is always available, whereby an audible intermodulation noise can be reduced, in particular if the two heating frequency units operate at a frequency of at least 30 kHz, preferably at least 32 kHz and particularly advantageously at least 34 kHz become.
- the control unit is provided to make an adjustment of a duty cycle of at least one of the heating frequency units.
- 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”.
- the output power can be changed.
- the control unit is provided to keep temporally as constant as possible by changing the duty cycle of at least one of the two Schufrequenzajien an overall output of both Schufrequenzüen in at least one operating state and particularly advantageous a maximum difference of total output power at two different times below a legally and / or by Norms prescribed value to press.
- a reduction of a Flickerlevels can be achieved.
- a "flicker level" is intended to indicate a maximum difference between total output powers be understood at two different times.
- an even more continuous power output of both heating frequency units can be made possible.
- a method is proposed with a cooking device device, in particular a cooktop device, with at least two heating frequency units in which a respective average output power of the heating frequency units is set while largely avoiding intermodulation noise, wherein a nonzero frequency of one of the heating frequency units while maintaining an operation of the other heating frequency unit is changed to a nonzero value.
- a power output which is as continuous as possible can be achieved, in particular per heating frequency unit, since a temporary shutdown of a heating frequency unit can be dispensed with.
- 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 16 cooking appliance.
- the induction hob 16 comprises a hob plate 18, in particular of a glass ceramic, on which in a known manner three heating zones 20, 22, 24 are marked.
- the hob plate 18 is arranged horizontally in an operational state of the induction hob 16 and provided for setting up cooking utensils. Furthermore, touch-sensitive operating elements 26 and display elements 28 of an operating and display unit 30 of the induction hob 16 are marked on the hob plate 18 in a known manner.
- the induction hob 16 further comprises a cooking device device with two heating frequency units 10, 12 arranged below the hob plate 18 and with a control unit 14 arranged below the hob plate 18 Fig.
- the control unit 14 is integrated in a control and regulation unit 32 of the induction hob 16.
- One of the heating zone 20 associated and disposed below this induction heating unit is powered by the heating frequency unit 10 with energy.
- One of the heating zone 22 associated and arranged below this induction heating unit and another, the heating zone 24 associated and arranged below this induction heating unit are powered by a switching unit 34 of the cooking appliance by the heating frequency unit 12 with energy.
- the switching unit 34 is provided for operating the two induction heating units assigned to the two heating zones 22, 24 in a known manner in a time division multiplex controlled by the control unit 14.
- the control unit 14 is designed to set a respective average output power P 0A , P 0B of the heating frequency units 10, 12, so that the selected heating levels of the heating zones 20, 22, 24 are achieved, in particular using the time multiplex, and thereby intermodulation noises are avoided.
- the control unit 14 controls the heating frequency units 10, 12 in each case by means of a control signal V A (t) and V B (t).
- Fig. 2 shows by way of example a non-to-scale control signal V A (t) in a Cartesian coordinate system.
- a control voltage V A On a ordinate axis 36, a control voltage V A and on a abscissa axis 38, a time t is plotted.
- the control signal V (t) is a square wave signal during a pulse length y with a switch-on value V 0 and a switch-off value of 0 volts.
- the switch-on value V 0 is held during a switch-on time t 0 .
- a period of the rectangular signal is T 0 .
- T 0 -t 0 A period of the rectangular signal is T 0 .
- the turn-off value is held.
- a frequency f of the control signal V A (t) is calculated from a reciprocal of the period T 0 .
- the frequency f is usually between 30 kHz and 100 kHz.
- a duty cycle of the control signal V A (t) is calculated from a quotient of the switch-on time t 0 divided by the period T 0 .
- An envelope 40 of the control signal V A (t) is shown in dashed lines. After expiration the pulse length y, a control voltage V A of 0 volts is maintained during a period of time (T - y). After a period of time T, the square-wave signal begins again.
- control signal V A (t) takes the form of the square wave signal
- an inverter of the heating frequency unit 10 is periodically switched in accordance with a periodic change of the turn-on value V 0 and the turn-off value. This creates a high-frequency alternating current for operation of the induction heating units.
- the heating frequency unit 10 in a continuous operation requires a higher frequency for generating the average output power P 0A than the heating frequency unit 12 for generating the average output power P 0B in a likewise continuous operation.
- the control unit 14 is provided to control the heating frequency units 10, 12 in two different ways. Fig. 3a-c show a first type of control of the heating frequency units 10, 12. Fig. 4a-c show a second type of control of the heating frequency units 10, 12. The choice of one of the two types of control depends in particular on the distance of the average output powers P 0A and P 0B selected by an operator.
- Fig. 3a shows in a Cartesian coordinate system by way of example two power frequency curves P A (f) and P B (f) for the first type of control.
- output powers P A and P B of the heating frequency units 10, 12 are plotted.
- the frequency f is plotted.
- the mean output powers P 0A and P 0B are relatively close to each other.
- the heating frequency unit 10, which requires a higher frequency to reach the average output power P 0A in continuous operation, will operate at a fixed frequency f 1 .
- the control unit 14 thus changes a nonzero frequency f 2 of the heating frequency unit 12 to a non-zero value f 3 while continuing to operate the heating frequency unit 10 at the frequency f 1 .
- the frequency difference k is 17 kHz.
- the frequencies f 1 , f 2 and f 3 are greater than 34 kHz.
- Fig. 3b shows in a Cartesian coordinate system by way of example two power-time curves P A (t) and P B (t) for the first type of control.
- the output powers P A and P B of the heating frequency units 10, 12 are plotted on an ordinate axis 46.
- the time t is plotted on an abscissa axis 48.
- the heating frequency unit 10 is operated at the frequency f 1
- the output power P A at each time t corresponds to the average output power P 0A .
- the output power P B2 for the heating frequency unit 12 in the first time period is smaller than the average output power P 0B .
- the output power P B3 is greater than the average output power P 0B .
- Fig. 3c shows in a Cartesian coordinate system by way of example two power-time curves P A (t) and P B (t) for the first type of control.
- the output powers P A and P B of the heating-frequency units 10, 12 are plotted on an ordinate axis 50.
- the time t is plotted on an abscissa axis 52.
- Fig. 3c a variant of the first type of control is shown in which the heating frequency unit 10 is operated pulsed with the pulse length y (see. Fig. 2 ).
- Fig. 4a shows in a Cartesian coordinate system by way of example two power frequency curves P A (f) and P B (f) for the second type of control.
- the output powers P A and P B of the heating frequency units 10, 12 are plotted on an ordinate axis 54.
- the frequency f is plotted.
- the average output powers P 0A and P 0B are relatively far apart.
- the heating frequency unit 10, which requires a higher frequency to reach the average output power P 0A in continuous operation, will operate at a fixed frequency f 1 .
- the control unit 14 thus changes a nonzero frequency f 2 of the heating frequency unit 12 to a non-zero value f 3 while continuing to operate the heating frequency unit 10 at the frequency f 1 .
- the frequency difference k is 17 kHz.
- the frequencies f 1 , f 2 and f 3 are greater than 34 kHz.
- Fig. 4b shows in a Cartesian coordinate system by way of example two power-time curves P A (t) and P B (t) for the second type of control.
- the output powers P A and P B of the heating frequency units 10, 12 are plotted on an ordinate axis 58.
- the time t is plotted on an abscissa axis 60.
- the output power P A at each time t corresponds to the average output power P 0A .
- the output power P B2 for the heating frequency unit 12 in the first time period is smaller than the average output power P 0B .
- the output power P B3 is greater than the average output power P 0B .
- the mean output power P 0B is analogous to the first type of control.
- Fig. 4c shows in a Cartesian coordinate system by way of example two power-time curves P A (t) and P B (t) for the second type of control.
- the output powers P A and P B of the heating frequency units 10, 12 are plotted on an ordinate axis 62.
- the time t is plotted on an abscissa axis 64.
- Fig. 4c a variant of the second type of control is shown, in which the heating frequency unit 10 is operated pulsed with the pulse length y (see. Fig. 2 ).
- the average output power P 0A is analogous to the first type of control.
- Fig. 5 shows in a Cartesian coordinate system by way of example a power frequency curve family P B '(f).
- the frequency f is plotted.
- Fig. 5 shows how by adjusting the duty cycle D B at a fixed frequency f, an adjustment of the output power P B can be made.
- D A be a duty cycle of the heating frequency unit 10
- D B2 is the duty cycle D B of the heating frequency unit 12 during the first period of length x
- D B3 is the duty cycle D B of the heating frequency unit 12 during the second time period of length (T - x).
- the control unit 14 is provided to make an adjustment of the duty D A , D B2 and D B3 , thereby lowering a Flickerlevel, in particular under a prescribed in the European standard EN 61000-3-3 limit.
- the duty cycles D B2 and D B3 of the heating frequency unit 12 are adjusted such that the output power P B2 in the first time period differs only slightly from the output power P B3 in the second time period.
- the duty cycle D A is additionally lowered, thereby increasing the pulse length y.
- an induction hob can also have four induction heating units, wherein two of the induction heating units are each connected via a switching unit to a heating frequency unit.
- a heating frequency associated with Indutechnischsriosakuen be operated by any other, the expert appears appropriate method.
- more than two induction heating units are assigned to a heating frequency unit.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
- Control Of Resistance Heating (AREA)
- Electric Ovens (AREA)
Abstract
Description
Die Erfindung geht aus von einer Gargerätevorrichtung nach dem Oberbegriff des Anspruchs 1.The invention is based on a cooking device device according to the preamble of
Die Druckschrift
Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Gargerätevorrichtung mit einer möglichst kontinuierlichen Leistungsabgabe bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 und des Verfahrensanspruchs 9 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können.The object of the invention is in particular to provide a generic Gargerätevorrichtung with a continuous power output possible. The object is achieved by the features of
Die Erfindung geht aus von einer Gargerätevorrichtung mit zumindest zwei Heizfrequenzeinheiten und mit wenigstens einer Steuereinheit, die dazu vorgesehen ist, eine jeweilige mittlere Ausgangsleistung der Heizfrequenzeinheiten unter weitgehender Vermeidung von Intermodulationsgeräuschen einzustellen.The invention is based on a cooking device device with at least two heating frequency units and with at least one control unit, which is provided to set a respective average output power of the heating frequency units while largely avoiding intermodulation noise.
Es wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, eine von null verschiedene Frequenz einer der Heizfrequenzeinheiten unter Beibehaltung eines Betriebs der anderen Heizfrequenzeinheit auf einen von null verschiedenenIt is proposed that the control unit be provided to set a non-zero frequency of one of the heating frequency units to one of zero while maintaining the operation of the other heating frequency unit
Wert zu verändern. Vorzugsweise ist die Gargerätevorrichtung als Kochfeldvorrichtung und besonders vorteilhaft als Induktionskochfeldvorrichtung ausgebildet. Unter "vorgesehen" soll insbesondere speziell programmiert und/oder ausgelegt und/oder ausgestattet verstanden werden. Unter einer "Heizfrequenzeinheit" soll insbesondere eine elektrische Einheit verstanden werden, die einen oszillierenden elektrischen Strom, vorzugsweise mit einer Frequenz von zumindest 1 kHz, insbesondere von wenigstens 10 kHz und vorteilhaft von mindestens 20 kHz, zu einem Betrieb wenigstens einer Heizeinheit erzeugt. Unter einer "Heizeinheit" soll insbesondere eine Einheit verstanden werden, die dazu vorgesehen ist, elektrische Energie zumindest teilweise in Wärme umzuwandeln und damit insbesondere ein Gargut zu erhitzen. Insbesondere umfasst die Heizeinheit einen Strahlungsheizkörper, einen Widerstandsheizkörper und/oder vorzugsweise einen Induktionsheizkörper, der dazu vorgesehen ist, elektrische Energie indirekt über induzierte Wirbelströme in Wärme umzuwandeln. Die Heizfrequenzeinheit umfasst insbesondere zumindest einen Wechselrichter, der vorzugsweise zwei Schalteinheiten umfasst. Unter einer "Schalteinheit" soll insbesondere eine Einheit verstanden werden, die dazu vorgesehen ist, einen zumindest einen Teil der Schalteinheit umfassenden Leitungspfad zu unterbrechen. Vorzugsweise ist die Schalteinheit ein bidirektionaler unipolarer Schalter, der insbesondere einen Stromfluss durch den Schalter entlang dem Leitungspfad in beide Richtungen ermöglicht und der insbesondere eine elektrische Spannung in zumindest einer Polungsrichtung kurzschließt. Vorzugsweise umfasst der Wechselrichter zumindest zwei Bipolartransistoren mit isolierter Gate-Elektrode und besonders vorteilhaft zumindest einen Dämpfungskondensator. Unter einem "Leitungspfad" soll insbesondere ein elektrisch leitendes Leiterstück zwischen zwei Punkten verstanden werden.Value change. The cooking device device is preferably designed as a hob device and particularly advantageously as an induction hob device. By "provided" is intended to be understood in particular 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 1 kHz, in particular of at least 10 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 a unit which is intended to at least partially convert electrical energy into heat and thus in particular to heat a food to be cooked. In particular, the heating unit comprises a radiant heater, a resistance heater and / or preferably an induction heater, which is intended to convert electrical energy indirectly via induced eddy currents into heat. 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. Preferably, 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. Preferably, 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.
Unter einer "Steuereinheit" soll insbesondere eine elektronische Einheit verstanden werden, die vorzugsweise in einer Steuer- und/oder Regeleinheit eines Gargeräts, insbesondere eines Induktionskochfelds, zumindest teilweise integriert ist. Vorzugsweise umfasst die Steuereinheit eine Recheneinheit und insbesondere zusätzlich zur Recheneinheit eine Speichereinheit mit einem darin gespeicherten Steuerprogramm. Vorzugsweise ist die Steuereinheit dazu vorgesehen, die Heizfrequenzeinheiten mittels elektrischer Steuersignale zu steuern und/oder zu regeln. Unter einem elektrischen "Steuersignal" soll insbesondere ein Signal mit einer elektrischen Spannung von höchstens 30 V, vorzugsweise von maximal 20 V und besonders vorteilhaft von höchstens 10 V verstanden werden, welches insbesondere in zumindest einem Betriebszustand den Wechselrichtern der Heizfrequenzeinheiten zugeführt wird. Vorzugsweise weist das Steuersignal zumindest zeitweise eine Periodizität auf, insbesondere mit einer Periodendauer von höchstens 1 ms, insbesondere von maximal 0,1 ms und vorteilhaft von höchstens 0,05 ms. Besonders vorteilhaft ist das Steuersignal ein Rechtecksignal, welches insbesondere zwei Werte annehmen kann, vorzugsweise einen Einschaltwert und einen Ausschaltwert. Vorzugsweise entspricht jeder der zwei Werte einer Schaltstellung der Wechselrichter. Unter einer "Frequenz" einer Heizfrequenzeinheit soll insbesondere die Frequenz des die Heizfrequenzeinheit steuernden Steuersignals verstanden werden. Unter einer "Beibehaltung eines Betriebs" einer Heizfrequenzeinheit soll insbesondere eine Weiterführung des Betriebs der Heizfrequenzeinheit mit verschiedener oder vorzugsweise gleicher, von null verschiedener Frequenz verstanden werden. Darunter, dass die Steuereinheit dazu vorgesehen ist, eine von null verschiedene Frequenz einer der Heizfrequenzeinheiten auf einen von null verschiedenen Wert "zu verändern", soll insbesondere verstanden werden, dass die Steuereinheit dazu vorgesehen ist, die Frequenz um einen von null verschiedenen Betrag zu erhöhen oder zu erniedrigen.A "control unit" is to be understood, in particular, as 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. Preferably, the control unit comprises a computing unit and in particular in addition to the computing unit a memory unit with a stored therein Control program. Preferably, the control unit is provided to control the heating frequency units by means of electrical control signals and / or to regulate. An electrical "control signal" is to be understood in particular a signal having an electrical voltage of at most 30 V, preferably of at most 20 V and more preferably of at most 10 V, which is supplied to the inverters of the heating frequency units in particular in at least one operating state. Preferably, 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. Particularly advantageously, the control signal is a square-wave signal, which in particular can assume two values, preferably a switch-on value and a switch-off value. Preferably, each of the two values corresponds to a switching position of the inverters. 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 "maintenance of an operation" of a heating frequency unit should in particular be understood as a continuation of the operation of the heating frequency unit with different or preferably the same, non-zero frequency. By the fact that the control unit is intended to "change" a nonzero frequency of one of the heating frequency units to a value other than zero, it should be understood in particular that the control unit is intended to increase the frequency by a non-zero amount or to humiliate.
Unter einer "Ausgangsleistung" soll insbesondere eine elektrische Leistung verstanden werden, die in zumindest einem Betriebszustand von einer Heizfrequenzeinheit an eine Heizeinheit übermittelt wird. Vorzugsweise wird die Ausgangsleistung durch einen elektrischen Strom übermittelt. Die Ausgangsleistung wird vorzugsweise in der Heizeinheit zumindest teilweise und besonders vorteilhaft zumindest zu einem Großteil in einen Wärmestrom umgewandelt. Unter einer "mittleren Ausgangsleistung" soll insbesondere eine zeitlich gemittelte Ausgangsleistung verstanden werden. Vorzugsweise ist die Steuereinheit dazu vorgesehen, die mittlere Ausgangsleistung derart einzustellen, dass eine von einem Bediener gewählte Heizleistung erreicht wird, insbesondere für jede Heizzone eines Kochfelds. Unter einer "weitgehenden Vermeidung von Intermodulationsgeräuschen" soll insbesondere verstanden werden, dass Intermodulationsgeräusche mit einer Frequenz von 17 kHz und kleiner in einem Abstand von 1 m vom Gargerät einen Schalldruckpegel von höchstens 20 dB, insbesondere von maximal 10 dB, vorzugsweise von höchstens 5 dB und besonders vorteilhaft von maximal 0 dB aufweisen. Vorzugsweise sind die Intermodulationsgeräusche von einem Bediener mit durchschnittlichem Gehör unhörbar.An "output power" is to be understood, in particular, as meaning an electrical power which, in at least one operating state, is transmitted from a heating frequency unit to a heating unit. Preferably, the output power is transmitted by an electric current. The output power is preferably converted in the heating unit at least partially and particularly advantageously at least to a large extent into a heat flow. A "mean output power" is to be understood in particular a time-averaged output power. Preferably, the control unit is provided to set the average output power such that one of a Operator selected heating power is achieved, in particular for each heating zone of a hob. A "substantial avoidance of intermodulation noise" should be understood in particular that intermodulation noises at a frequency of 17 kHz and smaller at a distance of 1 m from the cooking appliance a sound pressure level of at most 20 dB, in particular of at most 10 dB, preferably of at most 5 dB and particularly advantageous of a maximum of 0 dB. Preferably, the intermodulation sounds are inaudible by an average hearing operator.
Durch eine solche Ausgestaltung kann eine möglichst kontinuierliche Leistungsabgabe erreicht werden, insbesondere pro Heizfrequenzeinheit, da auf ein zeitweises Abschalten einer Heizfrequenzeinheit verzichtet werden kann. Ferner kann jede von einem Bediener gewählte Heizleistung eingestellt werden. Des Weiteren kann eine Eliminierung jeglichen Intermodulationsgeräuschs ermöglicht werden. Ferner kann eine Energieeffizienz erhöht werden, da ein Betrieb der Heizfrequenzeinheiten nahe bei einer Resonanzfrequenz ermöglicht wird.By means of such an embodiment, a power output which is as continuous as possible can be achieved, in particular per heating frequency unit, since a temporary shutdown of a heating frequency unit can be dispensed with. Furthermore, any heating power selected by an operator may be adjusted. Furthermore, elimination of any intermodulation noise can be enabled. Furthermore, energy efficiency can be increased because operation of the heating frequency units close to a resonance frequency is enabled.
In einer bevorzugten Ausgestaltung der Erfindung wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, zumindest eine der Heizfrequenzeinheiten mit einer festen Frequenz zu betreiben. Darunter, dass die Steuereinheit dazu vorgesehen ist, "zumindest eine der Heizfrequenzeinheiten mit einer festen Frequenz zu betreiben", soll insbesondere verstanden werden, dass die Steuereinheit dazu vorgesehen ist, die Heizfrequenzeinheit in einem kontinuierlichen Modus mit einem Steuersignal zu betreiben, welches die feste Frequenz aufweist, oder die Heizfrequenzeinheit in einem gepulsten Modus zu betreiben, wobei das Steuersignal während eines Pulses die feste Frequenz aufweist. Unter einem "kontinuierlichen Modus" soll insbesondere ein Betriebsmodus der Heizfrequenzeinheit verstanden werden, bei dem zwischen zwei Schaltvorgängen der Heizfrequenzeinheit maximal eine Periodendauer liegt, die der Periodendauer des Steuersignals entspricht. Unter einem "gepulsten Modus" soll insbesondere ein Betriebsmodus der Heizfrequenzeinheit verstanden werden, bei dem zwischen zwei Schaltvorgängen der Heizfrequenzeinheiten zumindest eine Periodendauer existiert, die wenigstens 10-mal, vorzugsweise mindestens 50-mal und besonders vorteilhaft zumindest 100-mal größer ist als die Periodendauer des Steuersignals. Hierdurch kann ein Steuerungsalgorithmus vorteilhaft vereinfacht werden.In a preferred embodiment of the invention it is proposed that the control unit is provided to operate at least one of the heating frequency units with a fixed frequency. By the fact that the control unit is intended to "operate at least one of the heating frequency units with a fixed frequency" should be understood in particular that the control unit is provided to operate the heating frequency unit in a continuous mode with a control signal which the fixed frequency or operating the heating frequency unit in a pulsed mode, wherein the control signal has the fixed frequency during a pulse. A "continuous mode" is to be understood, in particular, as an operating mode of the heating frequency unit in which there is a maximum of one cycle duration between two switching operations of the heating frequency unit, which corresponds to the period duration of the control signal. A "pulsed mode" is to be understood, in particular, as an operating mode of the heating frequency unit in which at least one period exists between two switching operations of the heating-frequency units, which is at least 10 times, preferably at least 50 times and particularly advantageously at least 100 times greater than the period of the control signal. As a result, a control algorithm can advantageously be simplified.
In einer besonders bevorzugten Ausgestaltung der Erfindung wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, diejenige Heizfrequenzeinheit, welche zu einem Erreichen der mittleren Ausgangsleistung in einem kontinuierlichen Betrieb eine höchste Frequenz benötigt, mit der festen Frequenz zu betreiben. Hierdurch kann ein Steuerungsalgorithmus besonders vorteilhaft vereinfacht werden.In a particularly preferred embodiment of the invention, it is proposed that the control unit is provided to operate the heating frequency unit which requires a highest frequency in order to achieve the average output power in a continuous operation at the fixed frequency. As a result, a control algorithm can be simplified particularly advantageously.
Vorteilhaft ist die Steuereinheit dazu vorgesehen, die Heizfrequenzeinheiten wenigstens zeitweise mit einer Frequenzdifferenz von mindestens 15 kHz zu betreiben. Vorzugsweise ist die Steuereinheit dazu vorgesehen, die Heizfrequenzeinheiten wenigstens zeitweise mit einer Frequenzdifferenz von zumindest 16 kHz und besonders vorteilhaft von wenigstens 17 kHz zu betreiben. Hierdurch kann ein hörbares Intermodulationsgeräusch vorteilhaft reduziert werden.Advantageously, the control unit is provided to operate the Heizfrequenzeinheiten at least temporarily with a frequency difference of at least 15 kHz. Preferably, the control unit is provided to operate the Heizfrequenzeinheiten at least temporarily with a frequency difference of at least 16 kHz and more preferably of at least 17 kHz. As a result, an audible intermodulation noise can be advantageously reduced.
Ferner wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, die Heizfrequenzeinheiten mit einer Frequenz von größer als 30 kHz zu betreiben. Vorzugsweise ist die Steuereinheit dazu vorgesehen, die Heizfrequenzeinheiten mit einer Frequenz von größer als 32 kHz und besonders vorteilhaft von größer als 34 kHz zu betreiben. Hierdurch kann ein hörbares Intermodulationsgeräusch besonders vorteilhaft reduziert werden.It is also proposed that the control unit is intended to operate the heating frequency units with a frequency greater than 30 kHz. Preferably, the control unit is provided to operate the Heizfrequenzeinheiten with a frequency of greater than 32 kHz and particularly advantageously greater than 34 kHz. In this way, an audible intermodulation noise can be reduced particularly advantageous.
Vorteilhaft ist die Steuereinheit dazu vorgesehen, die zwei Heizfrequenzeinheiten wenigstens zeitweise mit der gleichen Frequenz zu betreiben. Hierdurch kann ein hörbares Intermodulationsgeräusch eliminiert werden.Advantageously, the control unit is provided to operate the two Heizfrequenzeinheiten at least temporarily with the same frequency. This can eliminate an audible intermodulation noise.
Ferner wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, eine der Heizfrequenzeinheiten wenigstens zeitweise mit einer zumindest im Wesentlichen halb so großen Frequenz wie die andere Heizfrequenzeinheit zu betreiben.It is also proposed that the control unit is provided to operate one of the heating frequency units at least temporarily with an at least substantially half the frequency of the other heating frequency unit.
Unter einer "zumindest im Wesentlichen halb so großen Frequenz" soll insbesondere eine Frequenz verstanden werden, die sich höchstens um 10%, insbesondere maximal um 5% und vorzugsweise höchstens um 2% von einer Hälfte einer Bezugsfrequenz unterscheidet und die besonders vorteilhaft identisch zur Hälfte der Bezugsfrequenz ist. Hierdurch kann sichergestellt werden, dass eine von einem Bediener gewählte Heizleistung immer lieferbar ist, wobei ein hörbares Intermodulationsgeräusch reduziert werden kann, insbesondere wenn die beiden Heizfrequenzeinheiten mit einer Frequenz von zumindest 30 kHz, vorzugsweise von wenigstens 32 kHz und besonders vorteilhaft von mindestens 34 kHz betrieben werden.An "at least substantially half the frequency" is to be understood in particular a frequency which differs from one half of a reference frequency by at most 10%, in particular by more than 5%, and preferably by at most 2%, and which is particularly advantageously identical to half of the reference frequency Reference frequency is. In this way it can be ensured that a heating power selected by an operator is always available, whereby an audible intermodulation noise can be reduced, in particular if the two heating frequency units operate at a frequency of at least 30 kHz, preferably at least 32 kHz and particularly advantageously at least 34 kHz become.
In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, eine Anpassung eines Tastgrads von zumindest einer der Heizfrequenzeinheiten vorzunehmen. Unter einem "Tastgrad" soll insbesondere ein Verhältnis einer Zeitdauer, in der das Steuersignal innerhalb einer Periodendauer den Einschaltwert annimmt, zur Periodendauer des Steuersignals verstanden werden. Vorzugsweise kann bei fester Frequenz einer der Heizfrequenzeinheiten durch eine Veränderung des Tastgrads die Ausgangsleistung verändert werden. Darunter, dass "die Steuereinheit dazu vorgesehen ist, eine Anpassung eines Tastgrads von zumindest einer der Heizfrequenzeinheiten vorzunehmen", soll insbesondere verstanden werden, dass die Steuereinheit dazu vorgesehen ist, den Tastgrad von zumindest einer der Heizfrequenzeinheiten zu verändern, um hierdurch eine Änderung der Ausgangsleistung bei fester Frequenz der Heizfrequenzeinheit zu erreichen. Vorzugsweise ist die Steuereinheit dazu vorgesehen, durch Veränderung des Tastgrads zumindest einer der zwei Heizfrequenzeinheiten eine gesamte Ausgangsleistung beider Heizfrequenzeinheiten in zumindest einem Betriebszustand zeitlich möglichst konstant zu halten und besonders vorteilhaft eine maximale Differenz von gesamten Ausgangsleistungen an zwei verschiedenen Zeitpunkten unterhalb einen gesetzlich und/oder durch Normen vorgeschriebenen Wert zu drücken. Hierdurch kann eine Reduzierung eines Flickerlevels erreicht werden. Unter einem "Flickerlevel" soll insbesondere eine maximale Differenz von gesamten Ausgangsleistungen an zwei verschiedenen Zeitpunkten verstanden werden. Des Weiteren kann eine noch kontinuierlichere Leistungsabgabe beider Heizfrequenzeinheiten ermöglicht werden.In a further embodiment of the invention it is proposed that the control unit is provided to make an adjustment of a duty cycle of at least one of the heating frequency units. In particular, 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". Preferably, at a fixed frequency of one of the heating frequency units by changing the duty cycle, the output power can be changed. By the fact that "the control unit is intended to adapt the duty cycle of at least one of the heating frequency units", it should be understood, in particular, that the control unit is intended to change the duty cycle of at least one of the heating frequency units, thereby changing the output power to reach at fixed frequency of the heating frequency unit. Preferably, the control unit is provided to keep temporally as constant as possible by changing the duty cycle of at least one of the two Heizfrequenzeinheiten an overall output of both Heizfrequenzeinheiten in at least one operating state and particularly advantageous a maximum difference of total output power at two different times below a legally and / or by Norms prescribed value to press. As a result, a reduction of a Flickerlevels can be achieved. In particular, a "flicker level" is intended to indicate a maximum difference between total output powers be understood at two different times. Furthermore, an even more continuous power output of both heating frequency units can be made possible.
Ferner wird ein Verfahren mit einer Gargerätevorrichtung, insbesondere einer Kochfeldvorrichtung, mit zumindest zwei Heizfrequenzeinheiten vorgeschlagen, bei dem eine jeweilige mittlere Ausgangsleistung der Heizfrequenzeinheiten unter weitgehender Vermeidung von Intermodulationsgeräuschen eingestellt wird, wobei eine von null verschiedene Frequenz einer der Heizfrequenzeinheiten unter Beibehaltung eines Betriebs der anderen Heizfrequenzeinheit auf einen von null verschiedenen Wert geändert wird. Hierdurch kann eine möglichst kontinuierliche Leistungsabgabe erreicht werden, insbesondere pro Heizfrequenzeinheit, da auf ein zeitweises Abschalten einer Heizfrequenzeinheit verzichtet werden kann.Furthermore, a method is proposed with a cooking device device, in particular a cooktop device, with at least two heating frequency units in which a respective average output power of the heating frequency units is set while largely avoiding intermodulation noise, wherein a nonzero frequency of one of the heating frequency units while maintaining an operation of the other heating frequency unit is changed to a nonzero value. In this way, a power output which is as continuous as possible can be achieved, in particular per heating frequency unit, since a temporary shutdown of a heating frequency unit can be dispensed with.
Ferner wird ein Gargerät, insbesondere ein Kochfeld, mit einer erfindungsgemäßen Gargerätevorrichtung vorgeschlagen. Vorzugsweise handelt es sich bei dem Kochfeld um ein Induktionskochfeld.Furthermore, a cooking appliance, in particular a hob, proposed with a Gargerätevorrichtung invention. Preferably, the hob is an induction hob.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen:
- Fig. 1
- ein Induktionskochfeld mit einer erfindungsgemäßen Gargerätevorrichtung mit zwei Heizfrequenzeinheiten,
- Fig. 2
- ein beispielhaftes, nicht maßstabsgetreues Steuersignal der Heizfrequenzeinheiten,
- Fig. 3a
- je eine beispielhafte Leistungs-Frequenz-Kurve für die Heizfrequenzeinheiten bei einem Betrieb gemäß einer ersten Steuerungsvariante,
- Fig. 3b
- eine beispielhafte Leistungs-Zeit-Kurve bei einem kontinuierlichen Betrieb einer der zwei Heizfrequenzeinheiten gemäß der ersten Steuerungsvariante,
- Fig. 3c
- eine beispielhafte Leistungs-Zeit-Kurve bei einem gepulsten Betrieb einer der zwei Heizfrequenzeinheiten gemäß der ersten Steuerungsvariante,
- Fig. 4a
- je eine beispielhafte Leistungs-Frequenz-Kurve für die Heizfrequenzeinheiten bei einem Betrieb gemäß einer zweiten Steuerungsvariante,
- Fig. 4b
- eine beispielhafte Leistungs-Zeit-Kurve bei einem kontinuierlichen Betrieb einer der zwei Heizfrequenzeinheiten gemäß der zweiten Steuerungsvariante,
- Fig. 4c
- eine beispielhafte Leistungs-Zeit-Kurve bei einem gepulsten Betrieb einer der zwei Heizfrequenzeinheiten gemäß der zweiten Steuerungsvariante und
- Fig.5
- eine beispielhafte Leistungs-Frequenz-Kurvenschar für verschiedene Tastgrade für eine der Heizfrequenzeinheiten.
- Fig. 1
- an induction hob with a cooking appliance device according to the invention with two heating frequency units,
- Fig. 2
- an exemplary, not to scale, control signal of the heating frequency units,
- Fig. 3a
- each an exemplary power frequency curve for the heating frequency units in an operation according to a first control variant,
- Fig. 3b
- an exemplary power-time curve in a continuous operation of one of the two Heizfrequenzeinheiten according to the first control variant,
- Fig. 3c
- an exemplary power-time curve in a pulsed operation of one of the two heating frequency units according to the first control variant,
- Fig. 4a
- each an exemplary power frequency curve for the heating frequency units in an operation according to a second control variant,
- Fig. 4b
- an exemplary power-time curve in a continuous operation of one of the two Heizfrequenzeinheiten according to the second control variant,
- Fig. 4c
- an exemplary power-time curve in a pulsed operation of one of the two Heizfrequenzeinheiten according to the second control variant and
- Figure 5
- an exemplary power-frequency waveform for different duty cycles for one of the heating frequency units.
Im Folgenden sei angenommen, dass die Heizfrequenzeinheit 10 in einem kontinuierlichen Betrieb eine höhere Frequenz zur Erzeugung der mittleren Ausgangsleistung P0A benötigt als die Heizfrequenzeinheit 12 zur Erzeugung der mittleren Ausgangsleistung P0B in einem ebenfalls kontinuierlichen Betrieb. Es wäre jedoch auch genauso der umgekehrte Fall denkbar. Die Steuereinheit 14 ist dazu vorgesehen, die Heizfrequenzeinheiten 10, 12 auf zwei unterschiedliche Arten zu steuern.
Alternativ kann ein Induktionskochfeld auch über vier Induktionsheizeinheiten verfügen, wobei jeweils zwei der Induktionsheizeinheiten über je eine Schalteinheit mit einer Heizfrequenzeinheit verbunden sind. Alternativ oder zusätzlich zu einem Betrieb in einem Zeitmultiplex können zwei, einer Heizfrequenzeinheit zugeordnete Induktionsheizeinheiten auch durch jedes andere, dem Fachmann als sinnvoll erscheinende Verfahren betrieben werden. Des Weiteren ist auch denkbar, dass mehr als zwei Induktionsheizeinheiten einer Heizfrequenzeinheit zugeordnet sind.Alternatively, an induction hob can also have four induction heating units, wherein two of the induction heating units are each connected via a switching unit to a heating frequency unit. Alternatively, or in addition to operation in a time division multiplex, two, a heating frequency associated with Induktionsheizeinheiten be operated by any other, the expert appears appropriate method. Furthermore, it is also conceivable that more than two induction heating units are assigned to a heating frequency unit.
- 1010
- HeizfrequenzeinheitHeizfrequenzeinheit
- 1212
- HeizfrequenzeinheitHeizfrequenzeinheit
- 1414
- Steuereinheitcontrol unit
- 1616
- InduktionskochfeldInduction hob
- 1818
- KochfeldplatteHotplate
- 2020
- Heizzoneheating zone
- 2222
- Heizzoneheating zone
- 2424
- Heizzoneheating zone
- 2626
- Bedienelementoperating element
- 2828
- Anzeigeelementdisplay element
- 3030
- Bedien- und AnzeigeeinheitOperating and display unit
- 3232
- Steuer- und RegeleinheitControl unit
- 3434
- Schalteinheitswitching unit
- 3636
- Ordinatenachseaxis of ordinates
- 3838
- Abszissenachseabscissa
- 4040
- Einhüllendeenvelope
- 4242
- Ordinatenachseaxis of ordinates
- 4444
- Abszissenachseabscissa
- 4646
- Ordinatenachseaxis of ordinates
- 4848
- Abszissenachseabscissa
- 5050
- Ordinatenachseaxis of ordinates
- 5252
- Abszissenachseabscissa
- 5454
- Ordinatenachseaxis of ordinates
- 5656
- Abszissenachseabscissa
- 5858
- Ordinatenachseaxis of ordinates
- 6060
- Abszissenachseabscissa
- 6262
- Ordinatenachseaxis of ordinates
- 6464
- Abszissenachseabscissa
- 6666
- Ordinatenachseaxis of ordinates
- 6868
- Abszissenachseabscissa
- P0A P 0A
- mittlere Ausgangsleistungaverage output power
- P0B P 0B
- mittlere Ausgangsleistungaverage output power
- ff
- Frequenzfrequency
- f1 f 1
- Frequenzfrequency
- f2 f 2
- Frequenzfrequency
- f3 f 3
- Frequenzfrequency
- kk
- Frequenzdifferenzfrequency difference
- dj d j
- Tastgradduty cycle
- VA(t)V A (t)
- Steuersignalcontrol signal
- VB(t)V B (t)
- Steuersignalcontrol signal
- VA V A
- Steuerspannungcontrol voltage
- tt
- ZeitTime
- xx
- Längelength
- yy
- Pulslängepulse length
- V0 V 0
- EinschaltwertSwitch-on
- t0 t 0
- Einschaltzeiton time
- T0 T 0
- Periodendauerperiod
- TT
- ZeitspannePeriod of time
- PA(f)P A (f)
- Leistungs-Frequenz-KurvePower-frequency curve
- PB(f)P B (f)
- Leistungs-Frequenz-KurvePower-frequency curve
- PA P A
- Ausgangsleistungoutput
- PB P B
- Ausgangsleistungoutput
- PB2 P B2
- Ausgangsleistungoutput
- PB3 P B3
- Ausgangsleistungoutput
- PA(t)P A (t)
- Leistungs-Zeit-KurvePower-time curve
- PB(t)P B (t)
- Leistungs-Zeit-KurvePower-time curve
- PB'(f)P B '(f)
- Leistungs-Frequenz-KurvenscharLoad frequency curves
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201031947A ES2392223B1 (en) | 2010-12-27 | 2010-12-27 | Cooking device device and procedure for said device. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2469970A2 true EP2469970A2 (en) | 2012-06-27 |
EP2469970A3 EP2469970A3 (en) | 2012-11-07 |
EP2469970B1 EP2469970B1 (en) | 2017-09-20 |
Family
ID=45442876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11194218.1A Active EP2469970B1 (en) | 2010-12-27 | 2011-12-19 | Cooking device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2469970B1 (en) |
ES (2) | ES2392223B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2836053A1 (en) | 2013-08-05 | 2015-02-11 | Electrolux Appliances Aktiebolag | Induction hob and method for operating an induction hob |
ES2754787A1 (en) * | 2018-10-17 | 2020-04-20 | Bsh Electrodomesticos Espana Sa | Cooking Appliance Device (Machine-translation by Google Translate, not legally binding) |
ES2764740A1 (en) * | 2018-12-04 | 2020-06-04 | Bsh Electrodomesticos Espana Sa | Cooking appliance device (Machine-translation by Google Translate, not legally binding) |
WO2021089350A1 (en) * | 2019-11-05 | 2021-05-14 | Electrolux Appliances Aktiebolag | Induction hob |
CN112868271A (en) * | 2018-10-18 | 2021-05-28 | 三星电子株式会社 | Cooking apparatus and control method thereof |
EP4255111A1 (en) * | 2020-12-29 | 2023-10-04 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic heating device, noise suppression method, heating control system and storage medium |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2720746A1 (en) * | 2018-01-08 | 2019-07-24 | Bsh Electrodomesticos Espana Sa | COOKING FIELD DEVICE (Machine-translation by Google Translate, not legally binding) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1951003B1 (en) | 2007-01-23 | 2009-12-09 | Whirlpool Corporation | Control method for induction cooking hob and induction cooking hob adapted to carry out such method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2128958B1 (en) * | 1996-11-21 | 2000-01-16 | Balay Sa | POWER CONTROL PROCEDURE IN POWERED INDUCTION COOKERS THROUGH RECONFIGURABLE INVERTERS. |
ES2201937B1 (en) * | 2003-11-03 | 2005-02-01 | Bsh Electrodomesticos España, S.A. | PROCEDURE FOR THE OPERATION OF A CONVERTER CIRCUIT. |
DE102005021888A1 (en) * | 2005-05-04 | 2007-02-15 | E.G.O. Elektro-Gerätebau GmbH | Method and arrangement for power supply of a plurality of induction coils in an induction device |
TWI394547B (en) * | 2009-03-18 | 2013-05-01 | Delta Electronics Inc | Heating apparatus |
-
2010
- 2010-12-27 ES ES201031947A patent/ES2392223B1/en not_active Expired - Fee Related
-
2011
- 2011-12-19 ES ES11194218.1T patent/ES2642663T3/en active Active
- 2011-12-19 EP EP11194218.1A patent/EP2469970B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1951003B1 (en) | 2007-01-23 | 2009-12-09 | Whirlpool Corporation | Control method for induction cooking hob and induction cooking hob adapted to carry out such method |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2836053A1 (en) | 2013-08-05 | 2015-02-11 | Electrolux Appliances Aktiebolag | Induction hob and method for operating an induction hob |
ES2754787A1 (en) * | 2018-10-17 | 2020-04-20 | Bsh Electrodomesticos Espana Sa | Cooking Appliance Device (Machine-translation by Google Translate, not legally binding) |
CN112868271A (en) * | 2018-10-18 | 2021-05-28 | 三星电子株式会社 | Cooking apparatus and control method thereof |
EP3852492A1 (en) * | 2018-10-18 | 2021-07-21 | Samsung Electronics Co., Ltd. | Cooking apparatus and control method therefor |
EP3852492A4 (en) * | 2018-10-18 | 2021-11-03 | Samsung Electronics Co., Ltd. | Cooking apparatus and control method therefor |
CN112868271B (en) * | 2018-10-18 | 2023-05-16 | 三星电子株式会社 | Cooking apparatus and control method thereof |
ES2764740A1 (en) * | 2018-12-04 | 2020-06-04 | Bsh Electrodomesticos Espana Sa | Cooking appliance device (Machine-translation by Google Translate, not legally binding) |
EP3664578A1 (en) * | 2018-12-04 | 2020-06-10 | BSH Hausgeräte GmbH | Cooking device |
WO2021089350A1 (en) * | 2019-11-05 | 2021-05-14 | Electrolux Appliances Aktiebolag | Induction hob |
EP4255111A1 (en) * | 2020-12-29 | 2023-10-04 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic heating device, noise suppression method, heating control system and storage medium |
EP4255111A4 (en) * | 2020-12-29 | 2024-06-12 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic heating device, noise suppression method, heating control system and storage medium |
Also Published As
Publication number | Publication date |
---|---|
ES2392223B1 (en) | 2013-10-09 |
EP2469970A3 (en) | 2012-11-07 |
ES2392223A1 (en) | 2012-12-05 |
ES2642663T3 (en) | 2017-11-17 |
EP2469970B1 (en) | 2017-09-20 |
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