EP2312908B1 - Champ de cuisson doté de capteurs - Google Patents

Champ de cuisson doté de capteurs Download PDF

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Publication number
EP2312908B1
EP2312908B1 EP10187083.0A EP10187083A EP2312908B1 EP 2312908 B1 EP2312908 B1 EP 2312908B1 EP 10187083 A EP10187083 A EP 10187083A EP 2312908 B1 EP2312908 B1 EP 2312908B1
Authority
EP
European Patent Office
Prior art keywords
sensors
heating elements
cover plate
grid
hotplate according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10187083.0A
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German (de)
English (en)
Other versions
EP2312908A1 (fr
Inventor
Jose Alfonso Santolaria Lorenzo
Rene Schmalenstrot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to EP10187083.0A priority Critical patent/EP2312908B1/fr
Publication of EP2312908A1 publication Critical patent/EP2312908A1/fr
Application granted granted Critical
Publication of EP2312908B1 publication Critical patent/EP2312908B1/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
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the invention relates to a hob with sensors according to the preamble of claim 1.
  • a hob is from the DE 37 33 108 C1 known.
  • Induction hobs are known from the prior art, which enable automatic detection of cooking utensils placed on the hob.
  • either the Schuinduktoren the hob themselves are used as sensors or separate inductive sensors are arranged in the center of the inductors to detect the cookware element.
  • the detection of the cookware element spatially relatively low resolution.
  • the spatial resolution is limited by the distance between the heating inductors.
  • the simultaneous use of the heating inductors as sensors is associated with an additional expense, since the heating inductors must either be connected to a readout electronics or to the power electronics, which requires additional circuitry and / or additional wiring. A high installation cost due to complex wiring is also necessary if the sensors are integrated into the heating elements.
  • the DE 37 33 108 C1 describes a cooktop having a cover plate, a plurality of heating elements disposed beneath the cover plate, and a plurality of sensors for detecting a cookware element mounted on the cover plate, wherein the sensors are disposed in a layer between the cover plate and the heating elements and a distance between adjacent sensors is less than a distance between adjacent heating elements, wherein the heating elements and the sensors are each arranged in a grid.
  • the heating elements, which are each arranged below cooking zones, and the sensors, which are each arranged above the heating elements, are each arranged in a grid. Each heating element is assigned a sensor.
  • the invention is therefore in particular the object of providing a high-resolution and easy-to-install pot detection arrangement for a hob in a cost-effective manner, wherein the spatial resolution of the pot detectors to be improved.
  • the invention is directed to a hob having a cover plate, a plurality of heating elements disposed beneath the cover plate, and a plurality of sensors for detecting a cooking utensil mounted on the cover plate, the sensors being disposed in a layer between the cover plate and the heating elements.
  • a hob having a cover plate, a plurality of heating elements disposed beneath the cover plate, and a plurality of sensors for detecting a cooking utensil mounted on the cover plate, the sensors being disposed in a layer between the cover plate and the heating elements.
  • the sensors can all be designed as capacitive or all as optical sensors. Preferably, they are all designed as inductive sensors. It can also be provided that the plurality of sensors has at least one sensor of a first sensor type and at least one sensor of a second sensor type.
  • the advantages of the invention are particularly useful when the heating elements are inductors.
  • the spatial resolution of the sensor arrangement is improved with respect to the detection by means of heating inductors, since the distance between the adjacent sensors smaller is as a distance between the adjacent heating elements or heating inductors, wherein the heating elements and the sensors are each arranged in a grid, wherein the grid of the sensors is more closely meshed than the grid of the heating elements.
  • the raster shape can also differ.
  • the heating inductors or heating elements can be arranged in a rectangular grid, while the sensors can be arranged in a triangular mesh or honeycomb network, or vice versa.
  • the inductive sensors may consist of serigraphic conductor loops.
  • the inductive sensors may be fabricated from flat foil cables known, for example, for cabling LCD displays.
  • the variety of components of the hob can be reduced when the inductors are applied to a back of a cover plate.
  • the sensors may be applied to a carrier membrane arranged between the heating elements and the cover plate on a carrier screen, a carrier foil or carrier plate.
  • serigraphic methods can be used to print printed circuit traces, which are known, for example, from methods for producing car window heaters.
  • the hob comprises a control unit for evaluating the signals of the sensors for detecting the cooking utensil element.
  • the control unit may in particular be designed to use signals detected by the inductors in addition to the signals from the sensors for detecting the cooking utensil element. For this purpose, the number of necessary sensors can be reduced at a given spatial resolution. If the sensors are arranged in a grid, in particular those grid points can be omitted, which correspond to the centers of the inductors. The corresponding information can be determined by measuring the total effective inductance and / or the loss angle of the overall system consisting of the heating inductor and the cookware element.
  • FIGS. 1 to 3 show a hob with a cover plate 10 made of glass or glass ceramic and a plurality of under the cover plate arranged heating elements 12a - 12d.
  • the cooktop is an induction cooktop and the heating elements 12a-12d are inductors that generate a high-frequency magnetic field during operation of the cooktop that generates eddy currents in the bottom of a cookware element 14 to heat it.
  • a plurality of inductive sensors 16 for detecting a size and position of the cookware element 14 is further arranged on the cover plate 10.
  • the sensors 16 are arranged in a layer between the cover plate 10 and the heating elements 12a-12d ( Fig. 2 ), whose thickness is below about 1-2 mm, so as not to disturb the inductive coupling between the heating elements 12a-12d and the cooking utensil element 14 to be heated therefrom.
  • the sensors 16 are all configured as inductive sensors 16 in the exemplary embodiment. It can also be provided that at least one sensor 16 is a capacitive and / or at least one sensor 16 is an optical sensor.
  • this layer 18 is a serigraphically applied to the back 20 of the cover plate 10 layer of a conductive, suitable for screen printing paste, which can be cured or sintered after printing.
  • the inductive sensors 16 are therefore formed from serigraphic conductor loops, the ends of which are connected via flat foil lines 22 or thin copper wires glued to the back side 20 of the cover plate 10 to a driver unit 24 for operating the sensors 16 of the layer 18.
  • the driver unit 24 can generate measurement currents in the sensors 16 in order to detect the inductance and / or a loss angle of an overall system formed from the conductor loops and the cookware element 14 and to deduce the presence of the cookware element 14 from this.
  • the driver unit 24 is just like the not explicitly shown power electronics of the hob controlled by a control unit 26, which is designed as a freely programmable arithmetic unit and which may be formed integrally with the driver unit 24 in alternative embodiments of the invention.
  • the heating elements 12a-12b and the sensors 16 are each arranged in a grid, wherein the grid of the sensors 16 is much closer meshed than the grid of the heating elements 12a - 12d.
  • a lattice constant or a distance between two adjacent points of the grid of the heating elements 12a-12d is in the in Fig. 1 illustrated embodiment, four times as large as a lattice constant of the grid of the sensors 16.
  • the inventive concept is also applicable to matrix cooktops with a closer-meshed grid of heating elements 12a - 12d.
  • hobs comprise a large number of inductors, for example between 16 and 32 inductors.
  • the pitch of the sensor raster may be twice as narrow as the pitch of the inductors or heating elements 12a-12d.
  • FIGS. 4 and 5 show alternative embodiments of the invention. To avoid repetition, the following description of the figures is limited to differences to those in the FIGS. 1 to 3 illustrated embodiment. As description The consistent features will be on the description of the FIGS. 1 to 3 directed.
  • Fig. 4 shows an exploded view of a hob according to a further embodiment of the invention.
  • the sensors 16 are mounted in a separable from the cover plate 10 layer 18 on a support membrane 30.
  • the carrier membrane 30 is, for example, a temperature-resistant film and the sensors 16 may be screen-printed onto the carrier membrane 30.
  • the reading out of the sensors by the control unit 26 or the driver unit 24 is therefore particularly simple.
  • Fig. 5 shows a further alternative embodiment of the invention.
  • the sensors 16 are arranged in a grid, wherein those grid points are recessed, which correspond to the centers of the inductors or heating elements 12a - 12d. Since the heating elements 12a-12d can also be used as sensors, the information relating to the recessed halftone dots can be obtained by using the inductors 12a-12d as additional sensors.

Landscapes

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

Claims (11)

  1. Champ de cuisson avec une plaque de recouvrement (10), plusieurs éléments chauffants (12a - 12d) disposés sous la plaque de recouvrement (10) et plusieurs capteurs (16) afin de détecter un élément de batterie de cuisine (14) posé sur la plaque de recouvrement (10), dans lequel les capteurs (16) sont disposés en une couche (18) entre la plaque de recouvrement (10) et les éléments chauffants (12a - 12d) et un écartement entre des capteurs voisins (16) est plus petit qu'un écartement entre des éléments chauffants voisins (12a - 12d), dans lequel les éléments chauffants (12a - 12d) et les capteurs (16) sont respectivement disposés dans une trame, caractérisé en ce que la trame des capteurs (16) présente un maillage plus étroit que celui de la trame des éléments chauffants (12a - 12d).
  2. Champ de cuisson selon la revendication 1, caractérisé en ce que les éléments chauffants (12a - 12d) sont des inducteurs.
  3. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que les capteurs (16) englobent des capteurs inductifs (16), en particulier sont tous des capteurs inductifs (16).
  4. Champ de cuisson selon la revendication 3, caractérisé en ce que les capteurs inductifs (16) englobent des boucles conductrices fabriquées par sérigraphie.
  5. Champ de cuisson selon la revendication 3 ou 4, caractérisé en ce que les capteurs inductifs (16) englobent des conducteurs plats.
  6. Champ de cuisson selon l'une des revendications 3 à 5, caractérisé en ce que les capteurs inductifs (16) sont apposés sur une face arrière (20) de la plaque de recouvrement (10).
  7. Champ de cuisson selon l'une des revendications 1 à 5, caractérisé en ce que les capteurs (16) sont apposés sur une membrane porteuse disposée entre les éléments chauffants (12a - 12d) et la plaque de recouvrement (10).
  8. Champ de cuisson selon l'une des revendications précédentes, caractérisé par une unité de commande (26) afin d'évaluer les signaux des capteurs (16) pour la détection de l'élément de batterie de cuisine (14).
  9. Champ de cuisson selon les revendications 2 et 8, caractérisé en ce que l'unité de commande (26) est prévue afin d'utiliser, outre les signaux des capteurs (16), également des signaux perçus par les éléments chauffants (12a-12d) pour la détection de l'élément de batterie de cuisine (14).
  10. Champ de cuisson selon la revendication 9, caractérisé en ce que les capteurs (16) sont disposés dans une trame, les points de la trame correspondant aux points centraux des éléments chauffants (12a-12d) étant réservés.
  11. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que les capteurs (16) englobent au moins un capteur capacitif et/ou au moins un capteur optique.
EP10187083.0A 2009-10-13 2010-10-11 Champ de cuisson doté de capteurs Active EP2312908B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10187083.0A EP2312908B1 (fr) 2009-10-13 2010-10-11 Champ de cuisson doté de capteurs

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09382204 2009-10-13
ES200931011A ES2376566B1 (es) 2009-10-13 2009-11-18 Campo de cocción con sensores inductivos.
EP10187083.0A EP2312908B1 (fr) 2009-10-13 2010-10-11 Champ de cuisson doté de capteurs

Publications (2)

Publication Number Publication Date
EP2312908A1 EP2312908A1 (fr) 2011-04-20
EP2312908B1 true EP2312908B1 (fr) 2017-08-02

Family

ID=43446455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187083.0A Active EP2312908B1 (fr) 2009-10-13 2010-10-11 Champ de cuisson doté de capteurs

Country Status (2)

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EP (1) EP2312908B1 (fr)
ES (2) ES2376566B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160302263A1 (en) * 2015-04-10 2016-10-13 E.G.O. Elektro-Geraetebau Gmbh Induction hob and flexible support for an induction hob
WO2021045494A1 (fr) 2019-09-02 2021-03-11 Samsung Electronics Co., Ltd. Appareil de cuisson et son procédé de commande

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2792951B1 (fr) * 2013-04-18 2019-11-06 BSH Hausgeräte GmbH Table de cuisson
DE102014214795A1 (de) * 2014-07-28 2016-01-28 E.G.O. Elektro-Gerätebau GmbH Verfahren und Vorrichtung zur Erkennung der Posititon eines Topfes an einem Induktionskochfeld
DE102014111899A1 (de) * 2014-08-20 2016-02-25 Miele & Cie. Kg Kochfeldeinrichtung und Verfahren zum Betreiben
DE102014224051A1 (de) * 2014-11-25 2016-05-25 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld und Verfahren zur Steuerung eines Induktionskochfelds
EP3035772B1 (fr) 2014-12-16 2017-08-09 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif de chauffage par induction et procédé de commande d'une bobine de chauffage par induction
ES2619112B1 (es) * 2015-12-22 2018-04-10 Bsh Electrodomésticos España, S.A. Dispositivo de campo de cocción por inducción con al menos una unidad sensora capacitiva
EP3498054A1 (fr) * 2016-08-08 2019-06-19 Arçelik Anonim Sirketi Cuiseur chauffant à couche mince détectant des ustensiles de cuisson avec des procédés de chauffage améliorés
KR102052705B1 (ko) * 2017-06-26 2019-12-05 엘지전자 주식회사 유도 가열 장치
KR102052704B1 (ko) * 2017-06-26 2019-12-05 엘지전자 주식회사 유도 가열 장치
KR102069583B1 (ko) 2017-06-26 2020-01-23 엘지전자 주식회사 유도 가열 장치 및 유도 가열 장치의 용기 감지 방법
KR102069580B1 (ko) * 2017-06-26 2020-01-23 엘지전자 주식회사 용기 감지 센서 및 용기 감지 센서를 포함하는 유도 가열 장치
KR102052703B1 (ko) 2017-06-26 2019-12-05 엘지전자 주식회사 용기 감지 센서 및 용기 감지 센서를 포함하는 유도 가열 장치
EP3490338B1 (fr) * 2017-11-22 2022-07-06 Vestel Elektronik Sanayi ve Ticaret A.S. Appareil de cuisson à induction, procédé pour faire fonctionner un appareil de cuisson à induction et organe de commande pour un appareil de cuisson à induction
DE102017221341A1 (de) * 2017-11-28 2019-05-29 E.G.O. Elektro-Gerätebau GmbH Topferkennungssensor für ein Induktionskochfeld und Induktionskochfeld
KR102049864B1 (ko) * 2018-02-08 2019-11-28 엘지전자 주식회사 조리기기
ES2754873A1 (es) * 2018-10-18 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de inducción
ES2754877A1 (es) * 2018-10-18 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de Inducción
ES2754821A1 (es) * 2018-10-18 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de inducción
WO2020152499A1 (fr) 2019-01-23 2020-07-30 Gorenje Gospodinjski Aparati, D.D. Dispositif de détection de caractéristiques de récipient de cuisson et procédé de détection de caractéristiques de récipient de cuisson
DE102019214910A1 (de) * 2019-09-27 2021-04-01 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld und Verfahren zur Steuerung eines Induktionskochfelds
DE102020109484A1 (de) 2020-04-06 2021-10-07 Miele & Cie. Kg Induktives Küchensystem
US20230239974A1 (en) 2020-07-01 2023-07-27 BSH Hausgeräte GmbH Induction cooking appliance
US20230209665A1 (en) * 2021-12-23 2023-06-29 Whirlpool Corporation Cooking article detection system with differential detection coils
DE102022205386A1 (de) * 2022-05-30 2023-11-30 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld mit einer Trägerstruktur mit Antennen und/oder Sensoren, Verfahren zur Herstellung einer solchen Trägerstruktur und eine Verwendung einer Trägerstruktur für ein Induktionskochfeld

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IT1319292B1 (it) * 2000-11-08 2003-10-10 Whirlpool Co Dispositivo per rilevare la collocazione di utensili di cottura su unpiano di cottura ad elementi riscaldanti discreti e distribuiti.
US6350971B1 (en) * 2000-12-04 2002-02-26 General Electric Company Apparatus and method for detecting vessel movement on a cooktop surface
ES2273595B1 (es) * 2005-09-19 2007-12-16 Bsh Electrodomesticos España, S.A. Dispositivo con un sistema sensor para determinar la posicion de un objeto metalico.
JP4839786B2 (ja) * 2005-11-14 2011-12-21 パナソニック株式会社 誘導加熱装置
ES2324450B1 (es) * 2007-08-07 2010-05-25 Bsh Electrodomesticos España, S.A. Campo de coccion con un dispositivo sensor y procedimiento para la deteccion de bateria de coccion sobre un campo de coccion.

Non-Patent Citations (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160302263A1 (en) * 2015-04-10 2016-10-13 E.G.O. Elektro-Geraetebau Gmbh Induction hob and flexible support for an induction hob
WO2021045494A1 (fr) 2019-09-02 2021-03-11 Samsung Electronics Co., Ltd. Appareil de cuisson et son procédé de commande
EP3954179A4 (fr) * 2019-09-02 2022-05-18 Samsung Electronics Co., Ltd. Appareil de cuisson et son procédé de commande

Also Published As

Publication number Publication date
ES2376566B1 (es) 2013-01-29
ES2376566A1 (es) 2012-03-15
EP2312908A1 (fr) 2011-04-20
ES2639022T3 (es) 2017-10-25

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