EP3462812B1 - Procédé de fonctionnement d'un appareil de cuisson, cuisinière, dispositif de commande pour un appareil de cuisson et programme informatique - Google Patents

Procédé de fonctionnement d'un appareil de cuisson, cuisinière, dispositif de commande pour un appareil de cuisson et programme informatique Download PDF

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Publication number
EP3462812B1
EP3462812B1 EP17194222.0A EP17194222A EP3462812B1 EP 3462812 B1 EP3462812 B1 EP 3462812B1 EP 17194222 A EP17194222 A EP 17194222A EP 3462812 B1 EP3462812 B1 EP 3462812B1
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Prior art keywords
overflow
sensing elements
cooker
characteristic
controller
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EP17194222.0A
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German (de)
English (en)
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EP3462812A1 (fr
Inventor
Yusuf AK
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Vestel Elektronik Sanayi ve Ticaret AS
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Vestel Elektronik Sanayi ve Ticaret AS
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Priority to EP17194222.0A priority Critical patent/EP3462812B1/fr
Priority to TR2017/18992A priority patent/TR201718992A2/tr
Publication of EP3462812A1 publication Critical patent/EP3462812A1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Definitions

  • the present disclosure relates to a method for operating a cooker, a cooker, a controller for a cooker and a computer program.
  • capacitive touch sense elements which operate, in one example, by sensing a change in the capacitive coupling between conducting elements caused by the proximity of a user's finger to enable the user to control the induction cooker.
  • capacitive touch sense elements may also be used to detect contaminants falling onto or forming on the cooking surface in close proximity to a touch sense element, such as a liquid spilt from a cooking vessel.
  • CN202432566U describes the use of a capacitive cooker overflow detection device, for an induction cooker in particular, surrounding a heating area of a cooker surface onto which a cooking vessel would be placed. In this way, a dedicated overflow detection arrangement is provided separately from a touch-sensitive cooker control panel.
  • US2008/0150705A1 describes a capacitive contamination detection element provided in addition to, but normally isolated from, a capacitive touch sense element on a cooking surface, for example. Detection of an overflow from a cooking vessel comprises detecting a coupling of signals from the touch sense element to the contamination detection element or vice-versa, caused by a contaminant overlaying both elements, as may typically occur with an overflow.
  • US2013037536A1 describes an induction heating cooking device which includes a boiling-over detection portion which is adapted to reduce heating output from an inverter to a pre-set value based on an amount of change of a capacitance detected by a capacitance detection portion.
  • a method for operating a cooker having at least two overflow sensing elements associated with a heating element of the cooker, the overflow sensing elements each having a measurable characteristic comprising:
  • the method comprises deactivating the associated heating element of the cooker if an overflow event is identified. That is, when an overflow event is detected, the heating element of the cooker is automatically deactivated.
  • the overflow sensing elements each comprises a capacitive touch sense element and (i) comprises making measurements of capacitance of each of the capacitive touch sense elements or making measurements of a value indicative of said capacitances.
  • (ii) comprises using two or more measurements of the characteristic of the overflow sensing elements made at (i) during the calibration period and determining the reference values of the characteristic therefrom.
  • (ii) comprises determining, using measurements made at (i) before activation of the associated heating element or made at another time selected by the user, a reference value for the characteristic for each of the overflow sensing elements. This ensures that the reference value is determined before there has been any opportunity of an overflow due to cooking. However, the reference value may alternatively be determined or renewed at any time selected by the user.
  • a cooker comprising:
  • the controller is arranged to deactivate a heating element of the cooker if an overflow event is identified.
  • the overflow sensing elements each comprise a capacitive touch sense element and the controller is arranged, at (i), to make measurements of capacitance of each of the capacitive touch sense elements or to make measurements of a value indicative of said capacitances.
  • the controller is arranged, at (ii), to use two or more measurements of the characteristic of the at least one overflow sensing element made at (i) during the calibration period and determining the reference value of the characteristic therefrom.
  • a controller for a cooker having at least two overflow sensing elements associated with a cooking surface, the overflow sensing elements having a measurable characteristic, the controller being arranged:
  • the controller is arranged to deactivate an associated heating element of the cooker if an overflow event is identified.
  • the overflow sensing elements each comprise a capacitive touch sense element and the controller is arranged, at (i), to make measurements of capacitance of each of the capacitive touch sense elements or to make measurements of a value indicative of said capacitances.
  • the controller is arranged at (ii) to use two or more measurements of the characteristic of the overflow sensing elements made at (i) during the calibration period and to determine the reference values of the characteristic therefrom.
  • a computer program which when installed and executed by a digital processor causes the digital processor to implement the method according to examples of the first aspect described above.
  • An example implementation of the present invention will be described in the context of an induction cooker or other type of cooker having a flat glass or ceramic cooking surface. Such cooking surfaces are often provided with touch sense elements for use in controlling features of the cooker. These touch sense elements are typically of the capacitive type and used with a multi-channel touch sense microcontroller unit (MCU) and/or a main controller of the cooker arranged to detected changes in capacitance of each touch sense element and thereby sense a touch by a user.
  • MCU multi-channel touch sense microcontroller unit
  • a failure to detect an overflow and to take action to switch off the respective heating element and warn the user may result in the cooking vessel overheating and spoilage or messing of the cooking surface.
  • any touch-sensitive controls provided to control functions of the cooker may also be over-run by an overflowing liquid before any action can be taken by the user to disable the heating elements of the cooker, with unpredictable and potentially dangerous results.
  • Examples of the present invention provide a configurable overflow detection system more able to distinguish an overflow of liquid from the presence of a contaminant such as moisture, steam or limescale.
  • a contaminant such as moisture, steam or limescale.
  • the present invention may be applied to any touch sense control arrangement and is not limited to overflow detection, as will be apparent from the description that follows. An example will now be described, initially with reference to Figure 1 .
  • a cooking surface 10 of an induction cooker is shown schematically in a plan view.
  • the cooking surface 10 includes four heating regions 12, 14, 16 and 18 for placing cooking vessels to be heated.
  • a region of touch-sensitive cooker controls 20 is also provided.
  • Each of the regions 12-18 for placing cooking vessels is surrounded by a respective group of capacitive overflow sensing elements 22, 24, 26 and 28 intended to detect an overflow from a cooking vessel placed on the respective heating area 12-18.
  • Each of the groups of elements 22-28 may be connected to a respective multi-channel touch sense microcontroller unit (MCU), in this example an MCU having at least eight touch sense channels.
  • the touch sense MCU may for example be of a charge-timing capacitance to digital converter (CDC CT) type or a relaxation-oscillator (RO) converter type.
  • CDC CT charge-timing capacitance to digital converter
  • RO relaxation-oscillator
  • overflow sensing elements 22-28 are shown, each comprising a pair of electrodes 30, 32 and 34, 36 for use in sensing the presence of an overflow liquid 38 by a mutual capacitance sensing method.
  • An MCU 40 is arranged to measure mutual capacitance of each pair of electrodes 30, 32 and 34, 36 of the overflow sensing elements 22-28, or a parameter indicative of mutual capacitance, and to output the measurements for each of the overflow sensing elements 22-28 in a group to a cooker controller 42.
  • Such data may be used by a cooker controller 42, as will be described below with reference to Figure 3 according to an example, to determine whether there has been a change in mutual capacitance indicative of an overflow of liquid or other substance onto the respective region of the cooking surface 10.
  • a different type of sensing element 22-28 may be provided for sensing an overflow liquid 38 by the self-capacitance sensing method.
  • the functionality of the MCU 40 described above may be included within the functionality of the cooker controller 42 such that the functionality to be described below with reference to Figure 3 may be implemented entirely by the cooker controller 42.
  • a flow chart is provided showing an example of steps in operating a cooker having overflow protection described herein, in particular a cooker having overflow sensing elements 22-28 shown in Figure 1 .
  • the touch sense MCU 40 is triggered at STEP 52 to measure the mutual capacitance of each pair of electrodes 30, 32 and 34, 36 of each overflow sensing element 22-28 or to measure another parameter indicative of the mutual capacitance in the element.
  • the MCU 40 is arranged to repeat the measurements for each overflow sensing element 22-28 in a cyclic manner and to output the measurements to the cooker controller 42.
  • the cooker controller 42 is arranged, during a calibration period of predetermined length, to receive measurements output by the MCU 40 carried out over a number of cycles during the calibration period from activation of the cooker at STEP 50 or beginning at a time selected by a user. If the measured values for each overflow sensing element 22-28 are substantially equal for each cycle or at least remain within a predetermined range of values during the calibration period, then a single value or an average value is calculated for each overflow sensing element 22-28 and stored as a respective reference measurement. Each reference measurement implicitly takes account of the presence of any existing contaminant upon the cooking surface 10 in the vicinity of the respective overflow sensing element 22-28 and its effect upon the measured or indicated mutual capacitance. Any subsequent variation in a measured value for at least two overflow sensing elements 22-28 in a particular group as compared with the respective stored reference value is likely to be due to the presence of a new contaminant on the cooking surface 10.
  • the MCU 40 While heating a cooking vessel placed upon a heating region 12-18 of the cooking surface 10 at STEP 54, the MCU 40 is arranged at STEP 56 to make regular measurements of mutual capacitance of each overflow sensing element 22-28 in the respective group of elements, or optionally of all the overflow sensing elements 22-28 on the cooking surface 10, and to pass the measurements to the cooker controller 42.
  • the cooker controller 42 compares a latest measured value with the respective stored reference value for each overflow sensing element 22-28.
  • the cooker controller 42 determines that the latest measured value for a given overflow sensing element 22-28 differs from the respective stored reference value by more than a predetermined threshold amount, then it is assumed that a different level of contamination is now upon the cooking surface 10 in the vicinity of the overflow sensing element 22-28.
  • the cooker controller 42 is programmed to determine that an overflow event is to be recognised only if at least two of the overflow sensing elements in a group of elements 22-28 indicates a different level of contamination over the reference level. If an overflow event is recognised at STEP 58 then, at STEP 60, the cooker controller 42 deactivates the respective heating element and/or generates a warning signal, for example, to alert a user of the cooker to the recognised overflow event.
  • a benefit of the method described above with reference to Figure 3 is that if, for example, a cooking vessel is placed such that a part of the cooking vessel overlaps one or more of the overflow sensing elements 22-28 in a respective group, the presence of the cooking vessel will be taken into account when setting the reference measurement values. Any subsequent change, in particular any increase in a measured mutual capacitance value, for example in combination with a change to one or more adjacent overflow sensing elements 22-28 in the group, is therefore likely to be due to an overflow.
  • the cooker controller 42 is arranged to ignore any decrease in mutual capacitance for any given overflow sensing element 22-28 as compared with the reference value for the purposes of detecting an overflow on the basis that the mutual capacitance would be expected only to increase in the presence of an overflow or any other additional contaminant.
  • the MCU 40 and the cooker controller 42 may be implemented using a processor or processing system or circuitry provided by a single chip or integrated circuit or plural chips or integrated circuits, optionally provided as a chipset, an application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), digital signal processor (DSP), graphics processing units (GPUs), etc.
  • the chip or chips may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry, which are configurable so as to operate in accordance with the exemplary embodiments.
  • the exemplary embodiments may be implemented at least in part by computer software stored in (non-transitory) memory and executable by the processor, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice.
  • the program may be in the form of non-transitory source code, object code, a code intermediate source and object code such as in partially compiled form, or in any other non-transitory form suitable for use in the implementation of processes according to the invention.
  • the carrier may be any entity or device capable of carrying the program.
  • the carrier may comprise a storage medium, such as a solid-state drive (SSD) or other semiconductor-based RAM; a ROM, for example a CD ROM or a semiconductor ROM; a magnetic recording medium, for example a floppy disk or hard disk; optical memory devices in general; etc.
  • SSD solid-state drive
  • ROM read-only memory
  • magnetic recording medium for example a floppy disk or hard disk
  • optical memory devices in general etc.

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

Claims (14)

  1. Procédé pour faire fonctionner un cuiseur ayant au moins deux éléments de détection de débordement (22, 24, 26, 28) associés à un élément chauffant (12, 14, 16, 18) du cuiseur, les éléments de détection de débordement (22, 24, 26, 28) ayant chacun une caractéristique mesurable, le procédé consistant à :
    (i) réaliser des mesures de la caractéristique mesurable pour les éléments de détection de débordement (22, 24, 26, 28) ;
    (ii) déterminer, en utilisant des mesures effectuées en (i) pendant une période d'étalonnage, une valeur de référence pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28) ;
    (iii) comparer une mesure ultérieure effectuée en (i) avec la valeur de référence respective pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28), pour identifier ainsi un événement de débordement si une différence déterminée entre la mesure ultérieure et la valeur de référence respective de la caractéristique dépasse un seuil prédéterminé pour les deux éléments de détection de débordement (22, 24, 26, 28) ; et
    (iv) si un événement de débordement est identifié en (iii), générer un avertissement pour un utilisateur.
  2. Procédé selon la revendication 1, consistant à désactiver l'élément chauffant associé (12, 14, 16, 18) du cuiseur si un événement de débordement est identifié.
  3. Procédé selon la revendication 1 ou 2, dans lequel les éléments de détection de débordement (22, 24, 26, 28) comprennent chacun un élément de détection tactile capacitif, et dans lequel (i) consiste à réaliser des mesures de capacité de chacun des éléments de détection tactile capacitifs ou à réaliser des mesures d'une valeur indicative desdites capacités.
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel (ii) consiste à utiliser deux ou plusieurs mesures de la caractéristique des éléments de détection de débordement (22, 24, 26, 28) effectuées en (i) pendant la période d'étalonnage, et à déterminer les valeurs de référence de leur caractéristique.
  5. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel (i) consiste à déterminer, en utilisant des mesures effectuées en (i) avant l'activation de l'élément chauffant associé (12, 14, 16, 18) ou effectuées à un autre moment sélectionné par l'utilisateur, une valeur de référence pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28).
  6. Procédé selon l'une quelconque des revendications 1 à 5, consistant à désactiver un élément chauffant (12, 14, 16, 18) du cuiseur si un événement de débordement est identifié.
  7. Cuiseur comprenant :
    une surface de cuisson (10) ;
    au moins deux éléments de détection de débordement (22, 24, 26, 28) associés à la surface de cuisson (10) ; et
    un contrôleur (42) qui est agencé de manière à :
    (i) effectuer des mesures d'une caractéristique des éléments de détection de débordement (22, 24, 26, 28) ;
    (ii) déterminer, en utilisant au moins une mesure effectuée en (i) pendant une période d'étalonnage, une valeur de référence pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28) ;
    (iii) comparer une mesure ultérieure effectuée en (i) avec les valeurs de référence respectives pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28), pour identifier ainsi un événement de débordement si une différence déterminée entre la mesure ultérieure et la valeur de référence respective de la caractéristique dépasse un seuil prédéterminé pour les deux éléments de détection de débordement (22,24, 26, 28) ; et
    (iv) si un événement de débordement est identifié en (iii), générer un avertissement pour un utilisateur.
  8. Cuiseur selon la revendication 7, dans lequel le contrôleur (42) est agencé de manière à désactiver un élément chauffant (12, 14, 16, 18) du cuiseur si un événement de débordement est identifié.
  9. Cuiseur selon la revendication 7 ou 8, dans lequel les éléments de détection de débordement (22, 24, 26, 28) comprennent chacun un élément de détection tactile capacitif, et dans lequel le contrôleur (42) est agencé, en (i), de manière à effectuer des mesures de capacité de chacun des éléments de détection tactile capacitifs ou de manière à effectuer des mesures, d'une valeur indicative desdites capacités.
  10. Contrôleur (42) pour un cuiseur, le cuiseur ayant au moins deux éléments de détection de débordement (22, 24, 26, 28) associés à une surface de cuisson (10), les éléments de détection de débordement (22, 24, 26, 28) ayant une caractéristique mesurable, le contrôleur (42) étant agencé de manière à :
    (i) effectuer des mesures de la caractéristique mesurable des éléments de détection de débordement (22, 24, 26, 28) ;
    (ii) déterminer, en utilisant au moins une mesure effectuée en (i) pendant une période d'étalonnage, une valeur de référence pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28) ;
    (iii) comparer une mesure ultérieure effectuée en (i) avec les valeurs de référence respectives pour la caractéristique pour chacun des éléments de détection de débordement (22, 24, 26, 28), pour identifier ainsi un événement de débordement si une différence déterminée entre la mesure ultérieure et la valeur de référence respective de la caractéristique dépasse un seuil prédéterminé pour les deux éléments de détection de débordement (22, 24, 26, 28) ; et
    (iv) si un événement de débordement est identifié en (iii), générer un avertissement pour un utilisateur.
  11. Contrôleur (42) selon la revendication 10, lequel est agencé de manière à désactiver un élément chauffant associé (12, 14, 16, 18) du cuiseur si un événement de débordement est identifié.
  12. Contrôleur (42) selon la revendication 10 ou 11, dans lequel les éléments de détection de débordement (22, 24, 26, 28) comprennent chacun un élément de détection tactile capacitif, et dans lequel le contrôleur (42) est agencé, en (i), de manière à effectuer des mesures de capacité de chacun des éléments de détection tactile capacitifs ou de manière à effectuer des mesures d'une valeur indicative desdites capacités.
  13. Contrôleur (42) selon l'une quelconque des revendications 10 à 12, agencé en (ii) de manière à utiliser deux ou plusieurs mesures de la caractéristique des éléments de détection de débordement (22, 24, 26, 28) effectuées en (i) pendant la période d'étalonnage, et de manière à déterminer les valeurs de référence de leur caractéristique.
  14. Programme informatique qui, lorsqu'il est installé et exécuté par un processeur numérique, amène le processeur numérique à mettre en œuvre le procédé selon l'une quelconque des revendications 1 à 6.
EP17194222.0A 2017-09-29 2017-09-29 Procédé de fonctionnement d'un appareil de cuisson, cuisinière, dispositif de commande pour un appareil de cuisson et programme informatique Active EP3462812B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17194222.0A EP3462812B1 (fr) 2017-09-29 2017-09-29 Procédé de fonctionnement d'un appareil de cuisson, cuisinière, dispositif de commande pour un appareil de cuisson et programme informatique
TR2017/18992A TR201718992A2 (tr) 2017-09-29 2017-11-28 Bi̇r pi̇şi̇ri̇ci̇ni̇n çaliştirilmasi i̇çi̇n bi̇r yöntem, bi̇r pi̇şi̇ri̇ci̇, bi̇r pi̇şi̇ri̇ci̇ i̇çi̇n bi̇r kontrolör ve bi̇r bi̇lgi̇sayar programi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17194222.0A EP3462812B1 (fr) 2017-09-29 2017-09-29 Procédé de fonctionnement d'un appareil de cuisson, cuisinière, dispositif de commande pour un appareil de cuisson et programme informatique

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EP3462812A1 EP3462812A1 (fr) 2019-04-03
EP3462812B1 true EP3462812B1 (fr) 2020-09-09

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080150705A1 (en) 2006-12-20 2008-06-26 Tyco Electronics Canada, Ltd. Contaminant detecting touch sensitive element
CN102860126B (zh) * 2010-06-10 2014-11-05 松下电器产业株式会社 感应加热烹调器
CN202432566U (zh) 2012-01-10 2012-09-12 美的集团有限公司 一种电磁炉溢锅检测装置

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* Cited by examiner, † Cited by third party
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EP3462812A1 (fr) 2019-04-03

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