EP3784001B1 - Induction cooking system for induction cooking system comprising a temperature sensor, induction cooking system and method for operating the induction cooking system - Google Patents

Induction cooking system for induction cooking system comprising a temperature sensor, induction cooking system and method for operating the induction cooking system Download PDF

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Publication number
EP3784001B1
EP3784001B1 EP20181810.1A EP20181810A EP3784001B1 EP 3784001 B1 EP3784001 B1 EP 3784001B1 EP 20181810 A EP20181810 A EP 20181810A EP 3784001 B1 EP3784001 B1 EP 3784001B1
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Prior art keywords
induction
cookware
coil
temperature
cooking system
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German (de)
French (fr)
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EP3784001A1 (en
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Nils Marius Gehring
Christian Böhm
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Miele und Cie KG
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Miele und Cie KG
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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
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1236—Cooking devices induction cooking plates or the like and devices to be used in combination with them adapted to induce current in a coil to supply power to a device and electrical heating devices powered in this way
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/06—Cook-top or cookware capable of communicating with each other

Definitions

  • the invention relates to induction cookware for an induction cooking system of the type specified in the preamble of patent claim 1, an induction cooking system of the type specified in the preamble of patent claim 8 and a method for operating an induction cooking system.
  • the known induction cooking utensils for induction cooking systems include, for example, an induction coil for inductive coupling to an inductive heating coil of the induction hob, a temperature sensor for detecting a temperature of the induction cooking utensil and a controller for evaluating output signals from the temperature sensor, the controller being connected to the temperature sensor in a signal-transmitting manner.
  • the induction heating coil of the induction cooktop is also called the primary coil while the induction coil of the induction cookware is also called the secondary coil.
  • the secondary coil has the task of providing an operating voltage for the cookware, for example for operating a motor or a heating device, or for the cookware electronics, for example for recording and processing sensor data, through the inductive coupling.
  • the known induction cooking systems also include the aforementioned induction hob with the inductive heating coil.
  • the documents DE 10 2010 039072 A1 , DE 10 2010 020189 A1 , DE 10 2015 222797 A1 , WO 2006/064386 A1 and WO 2013/098016 A1 disclose an induction cookware for an induction cooking system with an induction cooktop, comprising an induction coil for inductive coupling to an inductive heating coil of the induction cooktop for the purpose of providing an electrical voltage in the induction cookware, a temperature sensor for detecting a temperature of the induction cookware and a controller for evaluating output signals from the temperature sensor, wherein the controller is connected to the temperature sensor in a signal-transmitting manner.
  • temperature regulation or temperature control when heating the cookware placed on the hob is desirable in order, for example, to increase ease of use for a user and/or to improve the quality of the cooking process.
  • a precise as possible Temperature measurement on the cookware required.
  • the invention therefore addresses the problem of improving temperature detection in an induction cookware.
  • this problem is solved by an induction cookware with the features of patent claim 1, which is characterized in that the induction coil is designed as the temperature sensor and the induction coil can be controlled with a measuring DC voltage by means of the controller for the purpose of detecting the temperature of the induction cookware. Furthermore, this problem is solved by an induction cooking system having the features of patent claim 8 and a method for operating an induction cooking system having the features of patent claim 9 .
  • the advantage that can be achieved with the invention is, in particular, that temperature detection is improved in the case of induction cookware.
  • it is now possible to detect the temperature in an induction cooking utensil for an induction cooking system in a manner that is simple in terms of design and circuitry. Due to the multiple use of the induction coil of the induction cookware, on the one hand, a reduction in components and, on the other hand, a space-saving design of the temperature sensor and thus of the induction cookware is made possible. Furthermore, the additional structural and circuitry complexity in the production of the induction cooking utensil according to the invention is reduced.
  • the temperature detection of the induction cookware according to the invention is implemented independently of the induction cooktop of the induction cooking system, since the temperature of the induction cookware is detected entirely by means of the induction cookware.
  • the induction cooking utensil according to the invention can be freely selected within wide suitable limits and can be designed, for example, as a saucepan or as a pan.
  • the induction coil of the induction cookware can be freely selected in terms of type, material, dimensioning, geometry, arrangement and number within wide, suitable limits.
  • An advantageous development of the induction cookware according to the invention provides that the material of the induction coil has a temperature-dependent electrical resistance.
  • the induction cookware according to the invention can be implemented in a particularly simple manner.
  • An advantageous development of the last two embodiments of the induction cookware according to the invention provides that the electrical resistance of the Material of the induction coil has a higher temperature dependence in a predetermined operating temperature sub-range of an operating temperature range of the induction cookware compared to operating temperatures of the induction cookware outside of this operating temperature sub-range.
  • a particularly precise temperature measurement of the induction cooking utensil is thereby made possible.
  • a particularly advantageous development of the induction cookware according to the invention provides that the induction coil is arranged on or in a base of the induction cookware.
  • the temperature of the induction cookware on or in the base of the induction cookware is particularly interesting and advantageous for temperature regulation or temperature control of the induction cookware. Furthermore, this results in a simple assignment of the induction coil of the induction cooking utensil to the inductive heating coil of the induction hob of the induction cooking system according to the invention.
  • the geometry of the induction coil can be freely selected within wide, suitable limits.
  • An advantageous further development of the aforementioned embodiment of the induction cooking utensil according to the invention provides that the induction coil is designed and arranged in such a way that it is arranged on or in the base at different radial distances from a center of the base. In this way, the quality of the base-side temperature detection is improved in the induction cookware according to the invention.
  • the temperature recorded by means of the induction coil represents a mean value over the entire induction coil, that is, for example, over an entire winding length of an induction coil designed as a winding. If the aforementioned winding forms a circle, for example, only the temperatures at the circular contact surface of the induction coil with the base are determined, ie only along a single radial distance from the center of the base of the induction cookware.
  • the induction coil has a plurality of circular line segments which are electrically conductively connected to one another and arranged concentrically to one another.
  • the quality of the base-side temperature detection in the induction cookware according to the invention is improved in a structurally particularly simple manner.
  • an advantageous development of the method according to the invention provides that the inductive heating coil of the induction cooktop is energized for the purpose of heating the induction cookware while the temperature of the induction cookware is being recorded is interrupted.
  • the quality of the temperature detection in the induction cooking utensil according to the invention is improved in a simple manner in terms of circuitry.
  • the operation of the inductive heating coil of the induction hob of the induction cooking system according to the invention can be clocked in such a way that the temperature is measured in the induction cookware according to the invention in the cycle times in which the inductive heating coil of the induction hob is not energized.
  • These cycle times can expediently be chosen to be very short, so that, for example, heating of the induction cookware by means of the induction hob is not noticeably delayed.
  • a further advantageous development of the method according to the invention provides that the output signals of the induction coil designed as a temperature sensor are evaluated in the controller in such a way that a DC component corresponding to the measured DC voltage is separated from an AC component of an AC voltage coupled into the induction coil by means of the inductive heating coil .
  • This enables high-quality temperature detection in the induction cooking utensil according to the invention, even while the inductive heating coil of the induction hob of the induction cooking system according to the invention is being energized.
  • the inductive heating of the induction cookware by means of the inductive heating coil of the induction cooktop and the temperature detection in the induction cookware by means of the induction coil of the induction cookware designed as a temperature sensor can take place simultaneously.
  • the induction cooking system 2 has an induction hob 4 with an inductive heating coil 6 and designed as a saucepan induction cookware 8, the induction cookware 8 in the 2 and 3 illustrated induction coil 10 for inductive coupling to the inductive heating coil 6 of the induction hob 4 for the purpose of providing electrical energy in the induction cookware 8 includes.
  • the shape of the induction cookware 8 is in the 2 and 3 only symbolized by a dashed line 11 in each case.
  • the induction coil 10 is designed to detect a temperature of the induction cookware 8 according to the invention at the same time as a temperature sensor and with a 2 controller 12 shown for evaluating output signals of the induction coil 10, which is designed as a temperature sensor, is connected in a signal-transmitting manner.
  • the signal transmission connection between the induction coil 10 and the controller 12 is symbolized by a line 14 .
  • the induction coil 10 can be controlled with a direct measurement voltage by means of the controller 12 for the purpose of detecting the temperature of the induction cooking utensil 8 .
  • the induction coil 10 of the induction cookware 8 is arranged in a base 16 of the induction cookware 8 .
  • the material of the induction coil 10 is copper and has a temperature-dependent electrical resistance.
  • the temperature dependency of the electrical resistance of the material is essentially linear in an operating temperature range of the induction cookware 8 .
  • the geometry of the induction coil 10 according to the first embodiment of the induction cookware 8 results from the 3 .
  • the induction coil 10 is designed and arranged in such a way that it is arranged on the base 16 at a radial distance from a center 18 of the base 16 .
  • a second embodiment of the induction cookware according to the invention is shown.
  • the same or equivalent components are in the Figures 1 to 4 provided with the same reference numbers.
  • the second exemplary embodiment of the induction cooking utensil according to the invention is explained below only to the extent of the differences from the first exemplary embodiment of the induction cooking utensil. Otherwise, reference is made to the above statements on the first exemplary embodiment of the induction cooking utensil according to the invention. This also applies to the functional interaction with the induction hob according to the present exemplary embodiment of the induction cooking system according to the invention.
  • the induction coil 10 in the second exemplary embodiment of the induction cookware 8 according to the invention is designed and arranged on the induction cookware 8 in such a way that the induction coil 10 is at different radial distances from the center 18 of the base 16 on the base 16 is arranged.
  • the induction coil 10 has two circular line segments 20, 22 which are electrically conductively connected to one another and arranged concentrically to one another.
  • the electrically conductive connection is in the 4 represented by a line 24.
  • the quality of the base-side temperature detection in the induction cookware 8 is improved.
  • the temperature recorded by means of the induction coil 10 represents a mean value over the entire induction coil 10, ie for example over an entire winding length of an induction coil 10 designed as a winding. If the aforementioned winding forms a circle, for example, as in the first exemplary embodiment of the induction cooking utensil 8 according to the invention 3 , so only the temperatures at the circular contact surface of the induction coil 10 with the base 16, ie only along a single radial distance from the center 18 of the base 16 of the induction cookware 8, determined.
  • a user who is not shown, places the induction cookware 8 with the items to be cooked on it on a hotplate of the induction hob 4 of the induction cooking system 2 and selects a cooking level for this hotplate in a manner known to those skilled in the art.
  • the food to be cooked is in the form of water, for example, and is not shown.
  • the hotplate corresponds to the inductive heating coil 6 of the induction hob 4. See 1 .
  • the inductive heating coil 6 of the induction cooktop 4 is energized in a manner known to those skilled in the art, so that the induction cookware 8 and thus the water therein heats up.
  • electrical energy in the form of an operating voltage for the cookware electronics is made available to the induction coil 10 of the induction cookware 8 by means of the inductive coupling between the inductive heating coil 6 of the induction cooktop 4 and the induction coil 10 of the induction cookware 8 .
  • the induction coil 10 of the induction cookware 8 is designed not only to provide electrical energy for the cookware electronics of the induction cookware 8 but also as a temperature sensor for detecting the temperature of the base of the induction cookware 8 . Due to the heating of the induction cookware 8, the temperature-dependent electrical resistance of the induction coil 10, which is made of copper, also changes. This temperature-dependent change in the electrical resistance of the induction coil 10 of the induction cooking utensil 8 is measured by the controller 12 by controlling the induction coil 10 with the measured DC voltage and evaluated by the controller 12, to which the induction coil 10 is connected in a signal-transmitting manner.
  • the evaluation of the output signals forwarded from the induction coil 10 to the controller 12 by means of the signal transmission connection 14 is relatively simple, so that the bottom temperature of the induction cookware 8 can be determined without great difficulty Effort can be determined.
  • the method according to the present exemplary embodiment provides that the current supply to the inductive heating coil 6 of the induction cooktop 4 for the purpose of heating the induction cookware 8 during the detection of the bottom temperature of the induction cookware 8 is interrupted.
  • the inductive heating coil 6 of the induction hob 4 is controlled in a clocked manner, i.e. energized in a clocked manner, so that the temperature of the induction cookware 8 is measured in the cycle times in which the inductive heating coil 6 of the induction hob 4 is not energized. These cycle times are chosen to be so short that the heating of the induction cookware 8 and thus the water contained therein is not noticeably delayed by the induction cooktop 4 .
  • the method according to the invention for operating the induction cooking system according to the invention according to the present exemplary embodiment is identical for the two exemplary embodiments of the induction cookware according to the invention explained above.
  • the invention it is thus possible to detect the temperature in an induction cooking utensil for an induction cooking system in a manner that is simple in terms of design and circuitry. Due to the multiple use of the induction coil of the induction cookware, on the one hand a reduction in components and on the other hand a space-saving design of the temperature sensor and thus the Induction cookware allows. Furthermore, the additional structural and circuitry complexity in the production of the induction cooking utensil according to the invention is reduced. In addition, the temperature detection of the induction cookware according to the invention is implemented independently of the induction cooktop of the induction cooking system, since the temperature of the induction cookware is detected entirely by means of the induction cookware.
  • the invention is not limited to the exemplary embodiments explained above.
  • the invention can be used advantageously both in the household and in the professional field.
  • the induction cooking utensil according to the invention can be freely selected within wide suitable limits and can also be designed as a pan, for example.
  • the type, material, dimensioning, geometry, arrangement and number of the induction coil can be freely selected within wide, suitable limits.
  • materials and geometries for the induction coil that deviate from the above-mentioned material and the above-mentioned geometry of the induction coil are also possible.
  • the electrical resistance of the material of the induction coil has a higher temperature dependency in a predetermined partial operating temperature range of an operating temperature range compared to operating temperatures of the induction cooking utensil outside of this partial operating temperature range.
  • a particularly precise temperature measurement of the induction cooking utensil is thereby made possible.
  • the output signals of the induction coil designed as a temperature sensor can be evaluated in the controller in such a way that a DC component corresponding to the measured DC voltage is separated from an AC component of an AC voltage coupled into the induction coil by means of the inductive heating coil .
  • this can be done using low-pass filtering.
  • This enables high-quality temperature detection in the induction cooking utensil according to the invention, even while the inductive heating coil of the induction hob of the induction cooking system according to the invention is being energized.
  • the inductive heating of the induction cookware by means of the inductive heating coil of the induction cooktop and the temperature detection in the induction cookware by means of the induction coil of the induction cookware designed as a temperature sensor can take place simultaneously.
  • the provision of electrical energy in the induction cooking utensil can also be carried out simultaneously with the inductive heating of the induction cooking utensil and/or the temperature detection in the induction cooking utensil by means of the induction coil of the induction cookware designed as a temperature sensor.

Description

Die Erfindung betrifft ein Induktionskochgeschirr für ein Induktionskochsystem der im Oberbegriff des Patentanspruchs 1 genannten Art, ein Induktionskochsystem der im Oberbegriff des Patentanspruchs 8 genannten Art und ein Verfahren zum Betrieb eines Induktionskochsystems.The invention relates to induction cookware for an induction cooking system of the type specified in the preamble of patent claim 1, an induction cooking system of the type specified in the preamble of patent claim 8 and a method for operating an induction cooking system.

Derartige Induktionskochgeschirre, Induktionskochsysteme und Verfahren zum Betrieb von Induktionskochsystemen sind aus dem Stand der Technik in einer Vielzahl von Ausführungsformen bereits vorbekannt.Such induction cookware, induction cooking systems and methods for operating induction cooking systems are already known from the prior art in a large number of embodiments.

Die bekannten Induktionskochgeschirre für Induktionskochsysteme umfassen beispielsweise eine Induktionsspule zur induktiven Kopplung mit einer induktiven Heizspule des Induktionskochfelds, einen Temperatursensor zur Erfassung einer Temperatur des Induktionskochgeschirrs und eine Steuerung zur Auswertung von Ausgangssignalen des Temperatursensors, wobei die Steuerung mit dem Temperatursensor signalübertragend verbunden ist. Die induktive Heizspule des Induktionskochfelds wird auch als Primärspule bezeichnet, während die Induktionsspule des Induktionskochgeschirrs auch als Sekundärspule bezeichnet wird. Die Sekundärspule hat zum einen die Aufgabe, durch die induktive Kopplung eine Betriebsspannung das Kochgeschirr, zum Beispiel zum Betrieb eines Motors oder einer Heizeinrichtung, beziehungsweise für die Kochgeschirrelektronik, zum Beispiel für das Erfassen und aufbereiten von Sensordaten, bereitzustellen. Zum anderen kann über die Kopplung eine Art Kommunikation zwischen Primärspule und Sekundärspule und somit zwischen Kochfeld und Kochgeschirr stattfinden, beispielsweise zur Übertrgung von Sensordaten. Die bekannten Induktionskochsysteme umfassen zusätzlich das vorgenannte Induktionskochfeld mit der induktiven Heizspule. Die Dokumenten DE 10 2010 039072 A1 , DE 10 2010 020189 A1 , DE 10 2015 222797 A1 , WO 2006/064386 A1 und WO 2013/098016 A1 offenbaren ein Induktionskochgeschirr für ein Induktionskochsystem mit einem Induktionskochfeld, umfassend eine Induktionsspule zur induktiven Kopplung mit einer induktiven Heizspule des Induktionskochfelds zwecks Bereitstellung einer elektrischen Spannung in dem Induktionskochgeschirr, einen Temperatursensor zur Erfassung einer Temperatur des Induktionskochgeschirrs und eine Steuerung zur Auswertung von Ausgangssignalen des Temperatursensors, wobei die Steuerung mit dem Temperatursensor signalübertragend verbunden ist. Anderseits offenbaren die Dokumenten " COIL OVERHEATING PROTECTION CIRCUIT", IBM TECHNICAL DISCLOSURE BULLETIN" Bd. 28, Nr. 10, 1. März 1986 (1986-03-01), Seiten 4484-4485 , CN 107 806 943 A und DE 10 2010 038894 A1 Induktionsspulen die als Temperatursensoren dienen.The known induction cooking utensils for induction cooking systems include, for example, an induction coil for inductive coupling to an inductive heating coil of the induction hob, a temperature sensor for detecting a temperature of the induction cooking utensil and a controller for evaluating output signals from the temperature sensor, the controller being connected to the temperature sensor in a signal-transmitting manner. The induction heating coil of the induction cooktop is also called the primary coil while the induction coil of the induction cookware is also called the secondary coil. On the one hand, the secondary coil has the task of providing an operating voltage for the cookware, for example for operating a motor or a heating device, or for the cookware electronics, for example for recording and processing sensor data, through the inductive coupling. On the other hand, a type of communication between the primary coil and the secondary coil and thus between the cooktop and the cookware can take place via the coupling, for example for the transmission of sensor data. The known induction cooking systems also include the aforementioned induction hob with the inductive heating coil. The documents DE 10 2010 039072 A1 , DE 10 2010 020189 A1 , DE 10 2015 222797 A1 , WO 2006/064386 A1 and WO 2013/098016 A1 disclose an induction cookware for an induction cooking system with an induction cooktop, comprising an induction coil for inductive coupling to an inductive heating coil of the induction cooktop for the purpose of providing an electrical voltage in the induction cookware, a temperature sensor for detecting a temperature of the induction cookware and a controller for evaluating output signals from the temperature sensor, wherein the controller is connected to the temperature sensor in a signal-transmitting manner. On the other hand, the documents reveal " COIL OVERHEATING PROTECTION CIRCUIT", IBM TECHNICAL DISCLOSURE BULLETIN", Vol. 28, No. 10, 1 March 1986 (1986-03-01), pages 4484-4485 , CN 107 806 943 A and DE 10 2010 038894 A1 Induction coils that serve as temperature sensors.

Allgemein ist bei Kochvorgängen auf Kochfeldern eine Temperaturregelung oder Temperatursteuerung bei der Beheizung des auf dem Kochfeld aufgestellten Kochgeschirrs wünschenswert, um beispielsweise den Bedienkomfort für einen Benutzer zu erhöhen und/oder die Qualität des Kochvorgangs zu verbessern. Hierfür ist eine möglichst genaue Temperaturerfassung an dem Kochgeschirr erforderlich. Auch zur Gewährleistung eines sicheren Betriebs des aus Kochfeld und Kochgeschirr gebildeten Kochsystems ist eine möglichst genaue Temperaturerfassung an dem Kochgeschirr anzustreben.In general, when cooking on hobs, temperature regulation or temperature control when heating the cookware placed on the hob is desirable in order, for example, to increase ease of use for a user and/or to improve the quality of the cooking process. For this purpose, a precise as possible Temperature measurement on the cookware required. Also to ensure safe operation of the cooking system formed by the cooktop and cookware, it is desirable to record the temperature of the cookware as accurately as possible.

Der Erfindung stellt sich somit das Problem, eine Temperaturerfassung bei einem Induktionskochgeschirr zu verbessern.The invention therefore addresses the problem of improving temperature detection in an induction cookware.

Erfindungsgemäß wird dieses Problem durch ein Induktionskochgeschirr mit den Merkmalen des Patentanspruchs 1 gelöst, das dadurch gekennzeichnet ist, dass die Induktionsspule als der Temperatursensor ausgebildet ist und die Induktionsspule zwecks Erfassung der Temperatur des Induktionskochgeschirrs mittels der Steuerung mit einer Messgleichspannung ansteuerbar ist. Ferner wird dieses Problem durch ein Induktionskochsystem mit den Merkmalen des Patentanspruchs 8 und ein Verfahren zum Betrieb eines Induktionskochsystems mit den Merkmalen des Patentanspruchs 9 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by an induction cookware with the features of patent claim 1, which is characterized in that the induction coil is designed as the temperature sensor and the induction coil can be controlled with a measuring DC voltage by means of the controller for the purpose of detecting the temperature of the induction cookware. Furthermore, this problem is solved by an induction cooking system having the features of patent claim 8 and a method for operating an induction cooking system having the features of patent claim 9 . Advantageous refinements and developments of the invention result from the following dependent claims.

Der mit der Erfindung erreichbare Vorteil besteht insbesondere darin, dass eine Temperaturerfassung bei einem Induktionskochgeschirr verbessert ist. Mittels der Erfindung ist es nun möglich, die Temperatur bei einem Induktionskochgeschirr für ein Induktionskochsystem auf konstruktiv und schaltungstechnisch einfache Weise zu erfassen. Aufgrund der Mehrfachverwendung der Induktionsspule des Induktionskochgeschirrs ist zum einen eine Bauteilreduzierung und zum anderen eine platzsparende Ausführung des Temperatursensors und damit des Induktionskochgeschirrs ermöglicht. Ferner ist der zusätzliche konstruktive und schaltungstechnische Aufwand bei der Herstellung des erfindungsgemäßen Induktionskochgeschirrs reduziert. Darüber hinaus ist die erfindungsgemäße Temperaturerfassung des Induktionskochgeschirrs unabhängig von dem Induktionskochfeld des Induktionskochsystems realisiert, da die Temperaturerfassung des Induktionskochgeschirrs vollständig mittels des Induktionskochgeschirrs erfolgt. Das erfindungsgemäße Induktionskochgeschirr ist in weiten geeigneten Grenzen frei wählbar und kann beispielsweise als ein Kochtopf oder als eine Pfanne ausgebildet sein.The advantage that can be achieved with the invention is, in particular, that temperature detection is improved in the case of induction cookware. By means of the invention, it is now possible to detect the temperature in an induction cooking utensil for an induction cooking system in a manner that is simple in terms of design and circuitry. Due to the multiple use of the induction coil of the induction cookware, on the one hand, a reduction in components and, on the other hand, a space-saving design of the temperature sensor and thus of the induction cookware is made possible. Furthermore, the additional structural and circuitry complexity in the production of the induction cooking utensil according to the invention is reduced. In addition, the temperature detection of the induction cookware according to the invention is implemented independently of the induction cooktop of the induction cooking system, since the temperature of the induction cookware is detected entirely by means of the induction cookware. The induction cooking utensil according to the invention can be freely selected within wide suitable limits and can be designed, for example, as a saucepan or as a pan.

Grundsätzlich ist die Induktionsspule des Induktionskochgeschirrs nach Art, Material, Dimensionierung, Geometrie, Anordnung und Anzahl in weiten geeigneten Grenzen frei wählbar. Eine vorteilhafte Weiterbildung des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass das Material der Induktionsspule einen temperaturabhängigen elektrischen Widerstand aufweist. Hierdurch ist das erfindungsgemäße Induktionskochgeschirr auf besonders einfache Weise realisierbar.In principle, the induction coil of the induction cookware can be freely selected in terms of type, material, dimensioning, geometry, arrangement and number within wide, suitable limits. An advantageous development of the induction cookware according to the invention provides that the material of the induction coil has a temperature-dependent electrical resistance. As a result, the induction cookware according to the invention can be implemented in a particularly simple manner.

Eine vorteilhafte Weiterbildung der vorgenannten Ausführungsform des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass die Temperaturabhängigkeit des elektrischen Widerstands in einem Betriebstemperaturbereich des Induktionskochgeschirrs im Wesentlichen linear ist. Auf diese Weise ist die Auswertung der Ausgangssignale des Temperatursensors, also der Induktionsspule des Induktionskochgeschirrs, vereinfacht.An advantageous development of the aforementioned embodiment of the induction cookware according to the invention provides that the temperature dependency of the electrical resistance is essentially linear in an operating temperature range of the induction cookware. In this way, the evaluation of the output signals from the temperature sensor, ie the induction coil of the induction cookware, is simplified.

Eine vorteilhafte Weiterbildung der beiden letztgenannten Ausführungsformen des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass der elektrische Widerstand des Materials der Induktionsspule in einem vorher festgelegten Betriebstemperaturteilbereich eines Betriebstemperaturbereichs des Induktionskochgeschirrs eine im Vergleich zu Betriebstemperaturen des Induktionskochgeschirrs außerhalb dieses Betriebstemperaturteilbereichs höhere Temperaturabhängigkeit aufweist. Hierdurch ist in diesem Betriebstemperaturteilbereich des Betriebstemperaturbereichs des erfindungsgemäßen Induktionskochgeschirrs eine besonders genaue Temperaturmessung des Induktionskochgeschirrs ermöglicht.An advantageous development of the last two embodiments of the induction cookware according to the invention provides that the electrical resistance of the Material of the induction coil has a higher temperature dependence in a predetermined operating temperature sub-range of an operating temperature range of the induction cookware compared to operating temperatures of the induction cookware outside of this operating temperature sub-range. In this partial operating temperature range of the operating temperature range of the induction cooking utensil according to the invention, a particularly precise temperature measurement of the induction cooking utensil is thereby made possible.

Eine besonders vorteilhafte Weiterbildung des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass die Induktionsspule an oder in einem Boden des Induktionskochgeschirrs angeordnet ist. Die Temperatur des Induktionskochgeschirrs an oder in dem Boden des Induktionskochgeschirrs ist für eine Temperaturregelung oder eine Temperatursteuerung des Induktionskochgeschirrs besonders interessant und vorteilhaft. Ferner ergibt sich dadurch eine einfache Zuordnung der Induktionsspule des Induktionskochgeschirrs zu der induktiven Heizspule des Induktionskochfelds des erfindungsgemäßen Induktionskochsystems.A particularly advantageous development of the induction cookware according to the invention provides that the induction coil is arranged on or in a base of the induction cookware. The temperature of the induction cookware on or in the base of the induction cookware is particularly interesting and advantageous for temperature regulation or temperature control of the induction cookware. Furthermore, this results in a simple assignment of the induction coil of the induction cooking utensil to the inductive heating coil of the induction hob of the induction cooking system according to the invention.

Wie oben bereits ausgeführt, ist die Induktionsspule unter anderem in deren Geometrie in weiten geeigneten Grenzen frei wählbar. Eine vorteilhafte Weiterbildung der vorgenannten Ausführungsform des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass die Induktionsspule derart ausgebildet und angeordnet ist, dass diese in voneinander verschiedenen radialen Abständen von einem Zentrum des Bodens an oder in dem Boden angeordnet ist. Auf diese Weise ist die Qualität der bodenseitigen Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr verbessert. Dies ist deshalb der Fall, da die mittels der Induktionsspule erfasste Temperatur einen Mittelwert über die gesamte Induktionsspule, also beispielsweise über eine gesamte Wicklungslänge einer als Wicklung ausgebildeten Induktionsspule, darstellt. Bildet die vorgenannte Wicklung beispielsweise einen Kreis, so werden auch nur die Temperaturen an der kreisförmigen Kontaktfläche der Induktionsspule mit dem Boden, also lediglich entlang eines einzigen radialen Abstands von dem Zentrum des Bodens des Induktionskochgeschirrs, ermittelt.As already explained above, the geometry of the induction coil can be freely selected within wide, suitable limits. An advantageous further development of the aforementioned embodiment of the induction cooking utensil according to the invention provides that the induction coil is designed and arranged in such a way that it is arranged on or in the base at different radial distances from a center of the base. In this way, the quality of the base-side temperature detection is improved in the induction cookware according to the invention. This is the case because the temperature recorded by means of the induction coil represents a mean value over the entire induction coil, that is, for example, over an entire winding length of an induction coil designed as a winding. If the aforementioned winding forms a circle, for example, only the temperatures at the circular contact surface of the induction coil with the base are determined, ie only along a single radial distance from the center of the base of the induction cookware.

Eine vorteilhafte Weiterbildung der letztgenannten Ausführungsform des erfindungsgemäßen Induktionskochgeschirrs sieht vor, dass die Induktionsspule eine Mehrzahl von miteinander elektrisch leitend verbundenen und zueinander konzentrisch angeordneten Kreisliniensegmenten aufweist. Hierdurch ist die Qualität der bodenseitigen Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr auf konstruktiv besonders einfache Weise verbessert.An advantageous development of the last-mentioned embodiment of the induction cooking utensil according to the invention provides that the induction coil has a plurality of circular line segments which are electrically conductively connected to one another and arranged concentrically to one another. As a result, the quality of the base-side temperature detection in the induction cookware according to the invention is improved in a structurally particularly simple manner.

Eine vorteilhafte Weiterbildung des erfindungsgemäßen Verfahrens sieht vor, dass eine Bestromung der induktiven Heizspule des Induktionskochfeldes zwecks Beheizung des Induktionskochgeschirrs während der Erfassung der Temperatur des Induktionskochgeschirrs unterbrochen wird. Auf diese Weise ist die Qualität der Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr auf schaltungstechnisch einfache Weise verbessert. Beispielsweise kann der Betrieb der induktiven Heizspule des Induktionskochfelds des erfindungsgemäßen Induktionskochsystems derart getaktet sein, dass die Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr in den Taktzeiten erfolgt, in denen die induktive Heizspule des Induktionskochfelds nicht bestromt wird. Diese Taktzeiten können zweckmäßigerweise sehr kurz gewählt werden, so dass beispielsweise ein Aufheizen des Induktionskochgeschirrs mittels des Induktionskochfelds nicht merklich verzögert wird.An advantageous development of the method according to the invention provides that the inductive heating coil of the induction cooktop is energized for the purpose of heating the induction cookware while the temperature of the induction cookware is being recorded is interrupted. In this way, the quality of the temperature detection in the induction cooking utensil according to the invention is improved in a simple manner in terms of circuitry. For example, the operation of the inductive heating coil of the induction hob of the induction cooking system according to the invention can be clocked in such a way that the temperature is measured in the induction cookware according to the invention in the cycle times in which the inductive heating coil of the induction hob is not energized. These cycle times can expediently be chosen to be very short, so that, for example, heating of the induction cookware by means of the induction hob is not noticeably delayed.

Alternativ dazu sieht eine weitere vorteilhafte Weiterbildung des erfindungsgemäßen Verfahrens vor, dass die Auswertung der Ausgangssignale der als Temperatursensor ausgebildeten Induktionsspule in der Steuerung derart erfolgt, dass ein zu der Messgleichspannung korrespondierender Gleichanteil von einem Wechselanteil einer mittels der induktiven Heizspule in die Induktionsspule eingekoppelten Wechselspannung getrennt wird. Hierdurch ist eine qualitativ hochwertige Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr auch während der Bestromung der induktiven Heizspule des Induktionskochfelds des erfindungsgemäßen Induktionskochsystems ermöglicht. Die induktive Beheizung des Induktionskochgeschirrs mittels der induktiven Heizspule des Induktionskochfelds sowie die Temperaturerfassung bei dem Induktionskochgeschirr mittels der als Temperatursensor ausgebildeten Induktionsspule des Induktionskochgeschirrs können also gleichzeitig stattfinden.Alternatively, a further advantageous development of the method according to the invention provides that the output signals of the induction coil designed as a temperature sensor are evaluated in the controller in such a way that a DC component corresponding to the measured DC voltage is separated from an AC component of an AC voltage coupled into the induction coil by means of the inductive heating coil . This enables high-quality temperature detection in the induction cooking utensil according to the invention, even while the inductive heating coil of the induction hob of the induction cooking system according to the invention is being energized. The inductive heating of the induction cookware by means of the inductive heating coil of the induction cooktop and the temperature detection in the induction cookware by means of the induction coil of the induction cookware designed as a temperature sensor can take place simultaneously.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen rein schematisch dargestellt und werden nachfolgend näher beschrieben. Es zeigt

Figur 1
ein Ausführungsbeispiel des erfindungsgemäßen Induktionskochsystems in einer perspektivischen Frontansicht,
Figur 2
ein erstes Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs in einer geschnittenen Seitenansicht, in teilweiser Darstellung,
Figur 3
das erste Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs in einer geschnittenen Bodenansicht, in teilweiser Darstellung und
Figur 4
ein zweites Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs in einer geschnittenen Bodenansicht, in teilweiser Darstellung.
Embodiments of the invention are shown purely schematically in the drawings and are described in more detail below. It shows
figure 1
an embodiment of the induction cooking system according to the invention in a perspective front view,
figure 2
a first embodiment of the induction cookware according to the invention in a sectional side view, in partial representation,
figure 3
the first embodiment of the induction cookware according to the invention in a sectional bottom view, in partial representation and
figure 4
a second embodiment of the induction cookware according to the invention in a sectional bottom view, in partial representation.

In den Fig. 1 bis 3 sind ein Ausführungsbeispiel des erfindungsgemäßen Induktionskochsystems und ein erstes Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs exemplarisch dargestellt.In the Figures 1 to 3 an embodiment of the induction cooking system according to the invention and a first embodiment of the induction cookware according to the invention are shown as examples.

Das Induktionskochsystem 2 weist ein Induktionskochfeld 4 mit einer induktiven Heizspule 6 und ein als Kochtopf ausgebildetes Induktionskochgeschirr 8 auf, wobei das Induktionskochgeschirr 8 eine in den Fig. 2 und 3 dargestellte Induktionsspule 10 zur induktiven Kopplung mit der induktiven Heizspule 6 des Induktionskochfelds 4 zwecks Bereitstellung von elektrischer Energie in dem Induktionskochgeschirr 8 umfasst. Die Form des Induktionskochgeschirrs 8 ist in den Fig. 2 und 3 jeweils lediglich durch eine gestrichelte Linie 11 symbolisiert. Die Induktionsspule 10 ist zur Erfassung einer Temperatur des Induktionskochgeschirrs 8 erfindungsgemäß gleichzeitig als ein Temperatursensor ausgebildet und mit einer in der Fig. 2 dargestellten Steuerung 12 zur Auswertung von Ausgangssignalen der als Temperatursensor ausgebildeten Induktionsspule 10 signalübertragend verbunden. Die Signalübertragungsverbindung zwischen der Induktionsspule 10 und der Steuerung 12 ist durch eine Linie 14 symbolisiert. Die Induktionsspule 10 ist zwecks Erfassung der Temperatur des Induktionskochgeschirrs 8 mittels der Steuerung 12 mit einer Messgleichspannung ansteuerbar.The induction cooking system 2 has an induction hob 4 with an inductive heating coil 6 and designed as a saucepan induction cookware 8, the induction cookware 8 in the 2 and 3 illustrated induction coil 10 for inductive coupling to the inductive heating coil 6 of the induction hob 4 for the purpose of providing electrical energy in the induction cookware 8 includes. The shape of the induction cookware 8 is in the 2 and 3 only symbolized by a dashed line 11 in each case. The induction coil 10 is designed to detect a temperature of the induction cookware 8 according to the invention at the same time as a temperature sensor and with a 2 controller 12 shown for evaluating output signals of the induction coil 10, which is designed as a temperature sensor, is connected in a signal-transmitting manner. The signal transmission connection between the induction coil 10 and the controller 12 is symbolized by a line 14 . The induction coil 10 can be controlled with a direct measurement voltage by means of the controller 12 for the purpose of detecting the temperature of the induction cooking utensil 8 .

Wie aus der Fig. 2 ersichtlich ist, ist die Induktionsspule 10 des Induktionskochgeschirrs 8 in einem Boden 16 des Induktionskochgeschirrs 8 angeordnet. Das Material der Induktionsspule 10 ist als Kupfer ausgebildet und weist einen temperaturabhängigen elektrischen Widerstand auf. Die Temperaturabhängigkeit des elektrischen Widerstands des Materials ist in einem Betriebstemperaturbereich des Induktionskochgeschirrs 8 im Wesentlichen linear.How from the 2 As can be seen, the induction coil 10 of the induction cookware 8 is arranged in a base 16 of the induction cookware 8 . The material of the induction coil 10 is copper and has a temperature-dependent electrical resistance. The temperature dependency of the electrical resistance of the material is essentially linear in an operating temperature range of the induction cookware 8 .

Die Geometrie der Induktionsspule 10 gemäß dem ersten Ausführungsbeispiel des Induktionskochgeschirrs 8 ergibt sich aus der Fig. 3. Die Induktionsspule 10 ist bei dem ersten Ausführungsbeispiel des Induktionskochgeschirrs 8 derart ausgebildet und angeordnet, dass diese in einem radialen Abstand von einem Zentrum 18 des Bodens 16 an dem Boden 16 angeordnet ist.The geometry of the induction coil 10 according to the first embodiment of the induction cookware 8 results from the 3 . In the first exemplary embodiment of the induction cookware 8 , the induction coil 10 is designed and arranged in such a way that it is arranged on the base 16 at a radial distance from a center 18 of the base 16 .

Alternativ dazu ist in der Fig. 4 ein zweites Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs dargestellt. Gleiche oder gleichwirkende Bauteile sind in den Fig. 1 bis 4 mit gleichen Bezugszeichen versehen. Das zweite Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs wird nachfolgend lediglich im Umfang der Unterschiede zu dem ersten Ausführungsbeispiel des Induktionskochgeschirrs erläutert. Ansonsten wird auf den obigen Ausführungen zu dem ersten Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs verwiesen. Dies gilt auch für das funktionale Zusammenwirken mit dem Induktionskochfeld gemäß dem vorliegenden Ausführungsbeispiel des erfindungsgemäßen Induktionskochsystems.Alternatively, in the 4 a second embodiment of the induction cookware according to the invention is shown. The same or equivalent components are in the Figures 1 to 4 provided with the same reference numbers. The second exemplary embodiment of the induction cooking utensil according to the invention is explained below only to the extent of the differences from the first exemplary embodiment of the induction cooking utensil. Otherwise, reference is made to the above statements on the first exemplary embodiment of the induction cooking utensil according to the invention. This also applies to the functional interaction with the induction hob according to the present exemplary embodiment of the induction cooking system according to the invention.

Im Unterschied zu dem ersten Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs 8 ist die Induktionsspule 10 bei dem zweiten Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs 8 derart ausgebildet und an dem Induktionskochgeschirr 8 angeordnet, dass die Induktionsspule 10 in voneinander verschiedenen radialen Abständen von dem Zentrum 18 des Bodens 16 an dem Boden 16 angeordnet ist. Hierfür weist die Induktionsspule 10 zwei miteinander elektrisch leitend verbundene und zueinander konzentrisch angeordnete Kreisliniensegmente 20, 22 auf. Die elektrisch leitende Verbindung ist in der Fig. 4 mittels einer Linie 24 dargestellt.In contrast to the first exemplary embodiment of the induction cookware 8 according to the invention, the induction coil 10 in the second exemplary embodiment of the induction cookware 8 according to the invention is designed and arranged on the induction cookware 8 in such a way that the induction coil 10 is at different radial distances from the center 18 of the base 16 on the base 16 is arranged. For this purpose, the induction coil 10 has two circular line segments 20, 22 which are electrically conductively connected to one another and arranged concentrically to one another. The electrically conductive connection is in the 4 represented by a line 24.

Auf diese Weise ist die Qualität der bodenseitigen Temperaturerfassung bei dem Induktionskochgeschirr 8 verbessert. Dies ist deshalb der Fall, da die mittels der Induktionsspule 10 erfasste Temperatur einen Mittelwert über die gesamte Induktionsspule 10, also beispielsweise über eine gesamte Wicklungslänge einer als Wicklung ausgebildeten Induktionsspule 10, darstellt. Bildet die vorgenannte Wicklung beispielsweise einen Kreis, wie bei dem ersten Ausführungsbeispiel des erfindungsgemäßen Induktionskochgeschirrs 8 gemäß der Fig. 3, so werden auch nur die Temperaturen an der kreisförmigen Kontaktfläche der Induktionsspule 10 mit dem Boden 16, also lediglich entlang eines einzigen radialen Abstands von dem Zentrum 18 des Bodens 16 des Induktionskochgeschirrs 8, ermittelt.In this way, the quality of the base-side temperature detection in the induction cookware 8 is improved. This is the case because the temperature recorded by means of the induction coil 10 represents a mean value over the entire induction coil 10, ie for example over an entire winding length of an induction coil 10 designed as a winding. If the aforementioned winding forms a circle, for example, as in the first exemplary embodiment of the induction cooking utensil 8 according to the invention 3 , so only the temperatures at the circular contact surface of the induction coil 10 with the base 16, ie only along a single radial distance from the center 18 of the base 16 of the induction cookware 8, determined.

Im Nachfolgenden wird die Funktionsweise des erfindungsgemäßen Induktionskochsystems und des erfindungsgemäßen Induktionskochgeschirrs sowie das erfindungsgemäße Verfahren gemäß den vorliegenden Ausführungsbeispielen und anhand der Fig. 1 bis 4 näher erläutert.In the following, the functionality of the induction cooking system according to the invention and the induction cookware according to the invention and the method according to the invention according to the present embodiments and based on the Figures 1 to 4 explained in more detail.

Ein nicht dargestellter Benutzer stellt das Induktionskochgeschirr 8 mit einem darin befindlichen Kochgut auf eine Kochstelle des Induktionskochfelds 4 des Induktionskochsystems 2 auf und wählt auf dem Fachmann bekannte Weise eine Kochstufe für diese Kochstelle aus. Das Kochgut ist beispielsweise als Wasser ausgebildet und nicht dargestellt. Die Kochstelle korrespondiert zu der induktiven Heizspule 6 des Induktionskochfelds 4. Siehe Fig. 1.A user, who is not shown, places the induction cookware 8 with the items to be cooked on it on a hotplate of the induction hob 4 of the induction cooking system 2 and selects a cooking level for this hotplate in a manner known to those skilled in the art. The food to be cooked is in the form of water, for example, and is not shown. The hotplate corresponds to the inductive heating coil 6 of the induction hob 4. See 1 .

Nachdem der Benutzer die gewünschte Kochstufe zur Beheizung des Induktionskochgeschirrs 8 ausgewählt hat, wird die induktive Heizspule 6 des Induktionskochfelds 4 auf dem Fachmann bekannte Weise bestromt, so dass sich das Induktionskochgeschirr 8 und damit das darin befindliche Wasser aufheizt. Mit der Bestromung der induktiven Heizspule 6 des Induktionskochfelds 4 wird mittels der induktiven Kopplung zwischen der induktiven Heizspule 6 des Induktionskochfelds 4 und der Induktionsspule 10 des Induktionskochgeschirrs 8 an der Induktionsspule 10 des Induktionskochgeschirrs 8 elektrische Energie in Form einer Betriebsspannung für die Kochgeschirrelektronik bereitgestellt.After the user has selected the desired cooking level for heating the induction cookware 8, the inductive heating coil 6 of the induction cooktop 4 is energized in a manner known to those skilled in the art, so that the induction cookware 8 and thus the water therein heats up. When the inductive heating coil 6 of the induction cooktop 4 is energized, electrical energy in the form of an operating voltage for the cookware electronics is made available to the induction coil 10 of the induction cookware 8 by means of the inductive coupling between the inductive heating coil 6 of the induction cooktop 4 and the induction coil 10 of the induction cookware 8 .

Die Induktionsspule 10 des Induktionskochgeschirrs 8 ist erfindungsgemäß nicht lediglich zur Bereitstellung von elektrischer Energie für die Kochgeschirrelektronik des Induktionsgeschirrs 8, sondern gleichzeitig als Temperatursensor zur Erfassung der bodenseitigen Temperatur des Induktionskochgeschirrs 8 ausgebildet. Aufgrund der Aufheizung des Induktionskochgeschirrs 8 verändert sich auch der temperaturabhängige elektrische Widerstand der Induktionsspule 10, die aus Kupfer hergestellt ist. Diese temperaturabhängige Änderung des elektrischen Widerstands der Induktionsspule 10 des Induktionskochgeschirrs 8 wird mittels der Ansteuerung der Induktionsspule 10 mit der Messgleichspannung durch die Steuerung 12 gemessen und mittels der Steuerung 12, mit der die Induktionsspule 10 signalübertragend verbunden ist, ausgewertet. Aufgrund der über den Betriebstemperaturbereich des Induktionskochgeschirrs 8 im Wesentlichen linearen Temperaturabhängigkeit des elektrischen Widerstands der Induktionsspule 10 ist die Auswertung der von der Induktionsspule 10 mittels der Signalübertragungsverbindung 14 an die Steuerung 12 weitergeleiteten Ausgangssignale relativ einfach, so dass daraus die bodenseitige Temperatur des Induktionskochgeschirrs 8 ohne großen Aufwand ermittelt werden kann.According to the invention, the induction coil 10 of the induction cookware 8 is designed not only to provide electrical energy for the cookware electronics of the induction cookware 8 but also as a temperature sensor for detecting the temperature of the base of the induction cookware 8 . Due to the heating of the induction cookware 8, the temperature-dependent electrical resistance of the induction coil 10, which is made of copper, also changes. This temperature-dependent change in the electrical resistance of the induction coil 10 of the induction cooking utensil 8 is measured by the controller 12 by controlling the induction coil 10 with the measured DC voltage and evaluated by the controller 12, to which the induction coil 10 is connected in a signal-transmitting manner. Due to the essentially linear temperature dependency of the electrical resistance of the induction coil 10 over the operating temperature range of the induction cookware 8, the evaluation of the output signals forwarded from the induction coil 10 to the controller 12 by means of the signal transmission connection 14 is relatively simple, so that the bottom temperature of the induction cookware 8 can be determined without great difficulty Effort can be determined.

Damit die oben erläuterte Temperaturerfassung mittels der als Temperatursensor ausgebildeten Induktionsspule 10 des Induktionskochgeschirrs 8 nicht in ungewünschter Weise beeinträchtigt wird, ist es bei dem erfindungsgemäßen Verfahren gemäß dem vorliegenden Ausführungsbeispiel vorgesehen, dass die Bestromung der induktiven Heizspule 6 des Induktionskochfelds 4 zwecks Beheizung des Induktionskochgeschirrs 8 während der Erfassung der bodenseitigen Temperatur des Induktionskochgeschirrs 8 unterbrochen wird. Hierfür wird die induktive Heizspule 6 des Induktionskochfelds 4 derart getaktet angesteuert, also getaktet bestromt, dass die Temperaturerfassung bei dem Induktionskochgeschirr 8 in den Taktzeiten erfolgt, in denen die induktive Heizspule 6 des Induktionskochfelds 4 nicht bestromt wird. Diese Taktzeiten sind derart kurz gewählt, dass das Aufheizen des Induktionskochgeschirrs 8 und damit des darin enthaltenen Wassers mittels des Induktionskochfelds 4 nicht merklich verzögert wird.So that the temperature detection explained above by means of the induction coil 10 of the induction cookware 8 designed as a temperature sensor is not adversely affected, the method according to the present exemplary embodiment provides that the current supply to the inductive heating coil 6 of the induction cooktop 4 for the purpose of heating the induction cookware 8 during the detection of the bottom temperature of the induction cookware 8 is interrupted. For this purpose, the inductive heating coil 6 of the induction hob 4 is controlled in a clocked manner, i.e. energized in a clocked manner, so that the temperature of the induction cookware 8 is measured in the cycle times in which the inductive heating coil 6 of the induction hob 4 is not energized. These cycle times are chosen to be so short that the heating of the induction cookware 8 and thus the water contained therein is not noticeably delayed by the induction cooktop 4 .

Das erfindungsgemäße Verfahren zum Betrieb des erfindungsgemäßen Induktionskochsystems gemäß dem vorliegenden Ausführungsbeispiel ist für die beiden oben erläuterten Ausführungsbeispiele des erfindungsgemäßen Induktionskochgeschirrs identisch.The method according to the invention for operating the induction cooking system according to the invention according to the present exemplary embodiment is identical for the two exemplary embodiments of the induction cookware according to the invention explained above.

Mittels der Erfindung gemäß der vorliegenden Ausführungsbeispiele ist es somit möglich, die Temperatur bei einem Induktionskochgeschirr für ein Induktionskochsystem auf konstruktiv und schaltungstechnisch einfache Weise zu erfassen. Aufgrund der Mehrfachverwendung der Induktionsspule des Induktionskochgeschirrs ist zum einen eine Bauteilreduzierung und zum anderen eine platzsparende Ausführung des Temperatursensors und damit des Induktionskochgeschirrs ermöglicht. Ferner ist der zusätzliche konstruktive und schaltungstechnische Aufwand bei der Herstellung des erfindungsgemäßen Induktionskochgeschirrs reduziert. Darüber hinaus ist die erfindungsgemäße Temperaturerfassung des Induktionskochgeschirrs unabhängig von dem Induktionskochfeld des Induktionskochsystems realisiert, da die Temperaturerfassung des Induktionskochgeschirrs vollständig mittels des Induktionskochgeschirrs erfolgt.By means of the invention according to the present exemplary embodiments, it is thus possible to detect the temperature in an induction cooking utensil for an induction cooking system in a manner that is simple in terms of design and circuitry. Due to the multiple use of the induction coil of the induction cookware, on the one hand a reduction in components and on the other hand a space-saving design of the temperature sensor and thus the Induction cookware allows. Furthermore, the additional structural and circuitry complexity in the production of the induction cooking utensil according to the invention is reduced. In addition, the temperature detection of the induction cookware according to the invention is implemented independently of the induction cooktop of the induction cooking system, since the temperature of the induction cookware is detected entirely by means of the induction cookware.

Die Erfindung ist nicht auf die oben erläuterten Ausführungsbeispiele begrenzt. Beispielsweise ist die Erfindung sowohl im Haushalt wie auch im professionellen Bereich vorteilhaft einsetzbar. Ferner ist das erfindungsgemäße Induktionskochgeschirr in weiten geeigneten Grenzen frei wählbar und kann beispielsweise auch als eine Pfanne ausgebildet sein. Darüber hinaus ist die Induktionsspule nach Art, Material, Dimensionierung, Geometrie, Anordnung und Anzahl in weiten geeigneten Grenzen frei wählbar. Beispielsweise sind auch von dem oben genannten Material und der oben genannten Geometrie der Induktionsspule abweichende Materialien und Geometrien für die Induktionsspule möglich.The invention is not limited to the exemplary embodiments explained above. For example, the invention can be used advantageously both in the household and in the professional field. Furthermore, the induction cooking utensil according to the invention can be freely selected within wide suitable limits and can also be designed as a pan, for example. In addition, the type, material, dimensioning, geometry, arrangement and number of the induction coil can be freely selected within wide, suitable limits. For example, materials and geometries for the induction coil that deviate from the above-mentioned material and the above-mentioned geometry of the induction coil are also possible.

Denkbar ist auch, dass der elektrische Widerstand des Materials der Induktionsspule in einem vorher festgelegten Betriebstemperaturteilbereich eines Betriebstemperaturbereichs eine im Vergleich zu Betriebstemperaturen des Induktionskochgeschirrs außerhalb dieses Betriebstemperaturteilbereichs höhere Temperaturabhängigkeit aufweist. Hierdurch ist in diesem Betriebstemperaturteilbereich des Betriebstemperaturbereichs des erfindungsgemäßen Induktionskochgeschirrs eine besonders genaue Temperaturmessung des Induktionskochgeschirrs ermöglicht.It is also conceivable that the electrical resistance of the material of the induction coil has a higher temperature dependency in a predetermined partial operating temperature range of an operating temperature range compared to operating temperatures of the induction cooking utensil outside of this partial operating temperature range. In this partial operating temperature range of the operating temperature range of the induction cooking utensil according to the invention, a particularly precise temperature measurement of the induction cooking utensil is thereby made possible.

Im Unterschied zu dem oben erläuterten Verfahren ist es auch möglich, dass die Auswertung der Ausgangssignale der als Temperatursensor ausgebildeten Induktionsspule in der Steuerung derart erfolgt, dass ein zu der Messgleichspannung korrespondierender Gleichanteil von einem Wechselanteil einer mittels der induktiven Heizspule in die Induktionsspule eingekoppelten Wechselspannung getrennt wird. Beispielsweise kann dies mittels einer Tiefpassfilterung erfolgen. Hierdurch ist eine qualitativ hochwertige Temperaturerfassung bei dem erfindungsgemäßen Induktionskochgeschirr auch während der Bestromung der induktiven Heizspule des Induktionskochfelds des erfindungsgemäßen Induktionskochsystems ermöglicht. Die induktive Beheizung des Induktionskochgeschirrs mittels der induktiven Heizspule des Induktionskochfelds sowie die Temperaturerfassung bei dem Induktionskochgeschirr mittels der als Temperatursensor ausgebildeten Induktionsspule des Induktionskochgeschirrs können also gleichzeitig stattfinden.In contrast to the method explained above, it is also possible for the output signals of the induction coil designed as a temperature sensor to be evaluated in the controller in such a way that a DC component corresponding to the measured DC voltage is separated from an AC component of an AC voltage coupled into the induction coil by means of the inductive heating coil . For example, this can be done using low-pass filtering. This enables high-quality temperature detection in the induction cooking utensil according to the invention, even while the inductive heating coil of the induction hob of the induction cooking system according to the invention is being energized. The inductive heating of the induction cookware by means of the inductive heating coil of the induction cooktop and the temperature detection in the induction cookware by means of the induction coil of the induction cookware designed as a temperature sensor can take place simultaneously.

Gemäß einerm weiteren Aspekt der Erfindung kann auch das Bereitstellen von elektrischer Energie in dem Induktionskochgeschirr gleichzeitig mit der induktiven Beheizung des Induktionskochgeschirrs und/oder der Temperaturerfassung bei dem Induktionskochgeschirr mittels der als Temperatursensor ausgebildeten Induktionsspule des Induktionskochgeschirrs erfolgen.According to a further aspect of the invention, the provision of electrical energy in the induction cooking utensil can also be carried out simultaneously with the inductive heating of the induction cooking utensil and/or the temperature detection in the induction cooking utensil by means of the induction coil of the induction cookware designed as a temperature sensor.

Claims (11)

  1. Induction cookware (8) for an induction cooking system (2) that has an induction hob (4), the cookware comprising an induction coil (10) for inductive coupling to an inductive heating coil (6) of the induction hob (4) for the purpose of providing an electrical voltage in the induction cookware (8), a temperature sensor for detecting a temperature of the induction cookware (8), and a controller (12) for evaluating output signals from the temperature sensor, the controller (12) being connected to the temperature sensor in a signal-transmitting manner, characterised in that the induction coil (10) is designed as the temperature sensor and the induction coil (10) can be controlled by the controller (12) by means of a DC measurement voltage for the purpose of detecting the temperature of the induction cookware (8).
  2. Induction cookware (8) according to claim 1, characterised in that the material of the induction coil (10) has a temperature-dependent electrical resistance.
  3. Induction cookware (8) according to claim 2, characterised in that the temperature dependency of the electrical resistance is substantially linear in an operating temperature range of the induction cookware (8).
  4. Induction cookware according to either claim 2 or claim 3, characterised in that the electrical resistance of the material of the induction coil has a higher temperature dependency in a predetermined operating temperature sub-range of an operating temperature range of the induction cookware compared to operating temperatures of the induction cookware outside this operating temperature sub-range.
  5. Induction cookware (8) according to any of claims 1 to 4, characterised in that the induction coil (10) is arranged on or in a base (16) of the induction cookware (8).
  6. Induction cookware (8) according to claim 5, characterised in that the induction coil (10) is designed and arranged in such a way that it is arranged at different radial distances from a centre (18) of the base (16) on or in the base (16).
  7. Induction cookware (8) according to claim 6, characterised in that the induction coil (10) has a plurality of circular line segments (20, 22) which are electrically conductively interconnected and arranged concentrically with one another.
  8. Induction cooking system (2) comprising an induction hob (4), which has an inductive heating coil (6), and induction cookware (8), characterised in that the induction cookware (8) is designed according to any of claims 1 to 7.
  9. Method for operating the induction cooking system (2) according to claim 8, wherein a temperature of the induction cookware (8) is detected by means of the temperature sensor, which is designed as the induction coil (10), and by the controller (12), wherein, for the purpose of detecting the temperature of the induction cookware (8), the induction coil (10) is controlled by the controller (12) by means of a DC measurement voltage.
  10. Method according to claim 9, characterised in that energizing the inductive heating coil (6) for the purpose of heating the induction cookware (8) is interrupted while the temperature of the induction cookware (8) is being detected.
  11. Method according to claim 9, characterised in that the output signals of the induction coil designed as a temperature sensor are evaluated in the controller in such a way that a DC component corresponding to the DC measurement voltage is separated from an AC component of an AC voltage coupled into the induction coil by means of the inductive heating coil.
EP20181810.1A 2019-07-22 2020-06-24 Induction cooking system for induction cooking system comprising a temperature sensor, induction cooking system and method for operating the induction cooking system Active EP3784001B1 (en)

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DE102008054911A1 (en) * 2008-12-18 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Smart food preparation device
US9955529B2 (en) * 2009-01-06 2018-04-24 Access Business Group International Llc Smart cookware
ES2366514B1 (en) * 2009-05-15 2012-10-09 Bsh Electrodomesticos España S.A. DEVICE FOR PLACEMENT ON AN INDUCTION COOKING FIELD.
DE102010038894B4 (en) * 2010-08-04 2014-12-24 Siemens Aktiengesellschaft Measuring system, circuit breaker and method
DE102010039072A1 (en) * 2010-08-09 2012-02-09 BSH Bosch und Siemens Hausgeräte GmbH Apparatus for operating household appliance i.e. smart pot, has communication interface receiving information from external communication medium, where apparatus displays received information in operation unit
ES2572972T3 (en) * 2011-12-29 2016-06-03 Arçelik Anonim Sirketi Wireless kitchen appliance operated in an induction heating cooker
DE102012207847A1 (en) * 2012-05-10 2013-11-14 Behr-Hella Thermocontrol Gmbh Device for inductive heating of a radiator
JP6406829B2 (en) * 2014-02-10 2018-10-17 トクデン株式会社 Induction heating roller device and induction coil temperature detection mechanism
DE102015222797A1 (en) * 2015-11-18 2017-05-18 BSH Hausgeräte GmbH System with cooking utensil and cookware
CN107806943A (en) * 2017-10-18 2018-03-16 维沃移动通信有限公司 A kind of coil temperature detection method and mobile terminal

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