EP3784001B1 - Ustensile de cuisson à induction pour un système de cuisson à induction doté d'un capteur de température, système de cuisson à induction et procédé de fonctionnement du système de cuisson à induction - Google Patents

Ustensile de cuisson à induction pour un système de cuisson à induction doté d'un capteur de température, système de cuisson à induction et procédé de fonctionnement du système de cuisson à induction 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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EP
European Patent Office
Prior art keywords
induction
cookware
coil
temperature
cooking system
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EP20181810.1A
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German (de)
English (en)
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EP3784001A1 (fr
Inventor
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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Publication of EP3784001A1 publication Critical patent/EP3784001A1/fr
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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
    • H05B6/10—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.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
  • Induction Heating Cooking Devices (AREA)

Claims (11)

  1. Ustensile de cuisson à induction (8) pour système de cuisson à induction (2) comportant une table de cuisson à induction (4), comprenant une bobine à induction (10) pour un couplage par induction à une bobine de chauffage par induction (6) de la table de cuisson à induction (4) dans le but de fournir une tension électrique dans l'ustensile de cuisson à induction (8), un capteur de température pour la détection d'une température de l'ustensile de cuisson à induction (8) et un dispositif de commande (12) pour l'évaluation de signaux de sortie du capteur de température, le dispositif de commande (12) étant connecté au capteur de température par transmission de signaux, caractérisé en ce que la bobine à induction (10) est conçue en tant que capteur de température et la bobine à induction (10) peut être commandée au moyen du dispositif de commande (12) avec une tension de mesure continue dans le but de détecter la température de l'ustensile de cuisson à induction (8).
  2. Ustensile de cuisson à induction (8) selon la revendication 1, caractérisé en ce que le matériau de la bobine à induction (10) présente une résistance électrique dépendant de la température.
  3. Ustensile de cuisson à induction (8) selon la revendication 2, caractérisé en ce que la dépendance à la température de la résistance électrique est sensiblement linéaire dans une plage de températures de fonctionnement de l'ustensile de cuisson à induction (8).
  4. Ustensile de cuisson à induction selon la revendication 2 ou 3, caractérisé en ce que la résistance électrique du matériau de la bobine à induction, dans une sous-plage de températures de fonctionnement prédéterminée d'une plage de températures de fonctionnement de l'ustensile de cuisson à induction, présente une dépendance à la température plus élevée par rapport à des températures de fonctionnement de l'ustensile de cuisson à induction en dehors de ladite sous-plage de températures de fonctionnement.
  5. Ustensile de cuisson à induction (8) selon l'une des revendications 1 à 4, caractérisé en ce que la bobine à induction (10) est disposée sur ou dans un fond (16) de l'ustensile de cuisson à induction (8).
  6. Ustensile de cuisson à induction (8) selon la revendication 5, caractérisé en ce que la bobine à induction (10) est conçue et disposée de telle manière qu'elle est disposée à des distances radiales différentes les unes des autres par rapport à un centre (18) du fond (16) sur ou dans le fond (16).
  7. Ustensile de cuisson à induction (8) selon la revendication 6, caractérisé en ce que la bobine à induction (10) présente une pluralité de segments de circonférences (20, 22) reliés électriquement les uns aux autres et disposés concentriquement les uns par rapport aux autres.
  8. Système de cuisson à induction (2), comprenant une table de cuisson à induction (4) comportant une bobine de chauffage par induction (6) et un ustensile de cuisson à induction (8), caractérisé en ce que l'ustensile de cuisson à induction (8) est conçu selon l'une des revendications 1 à 7.
  9. Procédé de fonctionnement du système de cuisson à induction (2) selon la revendication 8, dans lequel une température de l'ustensile de cuisson à induction (8) est détectée au moyen du capteur de température conçu en tant que bobine à induction (10) et du dispositif de commande (12), la bobine à induction (10) étant commandée au moyen du dispositif de commande (12) avec une tension de mesure continue dans le but de détecter la température de l'ustensile de cuisson à induction (8).
  10. Procédé selon la revendication 9, caractérisé en ce que l'alimentation de la bobine de chauffage par induction (6) en vue de chauffer l'ustensile de cuisson à induction (8) est interrompue pendant la détection de la température de l'ustensile de cuisson à induction (8).
  11. Procédé selon la revendication 9, caractérisé en ce que l'évaluation des signaux de sortie de la bobine à induction conçue en tant que capteur de température dans le dispositif de commande s'effectue de telle manière qu'une composante continue correspondant à la tension de mesure continue est séparée d'une composante alternative d'une tension alternative couplée dans la bobine à induction au moyen de la bobine de chauffage par induction.
EP20181810.1A 2019-07-22 2020-06-24 Ustensile de cuisson à induction pour un système de cuisson à induction doté d'un capteur de température, système de cuisson à induction et procédé de fonctionnement du système de cuisson à induction Active EP3784001B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019119731.7A DE102019119731A1 (de) 2019-07-22 2019-07-22 Induktionskochgeschirr für ein Induktionskochsystem mit einem Temperatursensor, Induktionskochsystem und Verfahren zum Betrieb des Induktionskochsystems

Publications (2)

Publication Number Publication Date
EP3784001A1 EP3784001A1 (fr) 2021-02-24
EP3784001B1 true EP3784001B1 (fr) 2022-06-22

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EP20181810.1A Active EP3784001B1 (fr) 2019-07-22 2020-06-24 Ustensile de cuisson à induction pour un système de cuisson à induction doté d'un capteur de température, système de cuisson à induction et procédé de fonctionnement du système de cuisson à induction

Country Status (3)

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EP (1) EP3784001B1 (fr)
DE (1) DE102019119731A1 (fr)
ES (1) ES2920965T3 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060132045A1 (en) * 2004-12-17 2006-06-22 Baarman David W Heating system and heater
DE102008054911A1 (de) * 2008-12-18 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Intelligentes Lebensmittelzubereitungsgerät
GB2478674B (en) * 2009-01-06 2014-05-07 Access Business Group Int Llc Smart cookware
ES2366514B1 (es) * 2009-05-15 2012-10-09 Bsh Electrodomesticos España S.A. Dispositivo para colocar sobre un campo de cocción por inducción.
DE102010038894B4 (de) * 2010-08-04 2014-12-24 Siemens Aktiengesellschaft Messsystem, Leistungsschalter und Verfahren
DE102010039072A1 (de) * 2010-08-09 2012-02-09 BSH Bosch und Siemens Hausgeräte GmbH Betriebsgerät zum Betreiben mindestens eines Aufsatz-Haushaltsgeräts
WO2013098016A1 (fr) * 2011-12-29 2013-07-04 Arcelik Anonim Sirketi Appareil ménager de cuisine sans fil fonctionnant sur une cuisinière à induction
DE102012207847A1 (de) * 2012-05-10 2013-11-14 Behr-Hella Thermocontrol Gmbh Vorrichtung zur induktiven Erwärmung eines Heizkörpers
JP6406829B2 (ja) * 2014-02-10 2018-10-17 トクデン株式会社 誘導発熱ローラ装置、及び誘導コイルの温度検出機構
DE102015222797A1 (de) * 2015-11-18 2017-05-18 BSH Hausgeräte GmbH System mit Kochgerät und Kochgeschirr
CN107806943A (zh) * 2017-10-18 2018-03-16 维沃移动通信有限公司 一种线圈温度检测方法及移动终端

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EP3784001A1 (fr) 2021-02-24
DE102019119731A1 (de) 2021-01-28
ES2920965T3 (es) 2022-08-12

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