EP3111723B1 - Table de cuisson comprenant une multitude d'éléments chauffants - Google Patents

Table de cuisson comprenant une multitude d'éléments chauffants Download PDF

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Publication number
EP3111723B1
EP3111723B1 EP15710000.9A EP15710000A EP3111723B1 EP 3111723 B1 EP3111723 B1 EP 3111723B1 EP 15710000 A EP15710000 A EP 15710000A EP 3111723 B1 EP3111723 B1 EP 3111723B1
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EP
European Patent Office
Prior art keywords
cookware element
control unit
heating zone
case
cookware
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
EP15710000.9A
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German (de)
English (en)
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EP3111723A1 (fr
Inventor
Carlos Franco Gutierrez
Teresa Del Carmen Marzo Alvarez
David Paesa García
Beatriz Villanueva Valero
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication date
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Publication of EP3111723A1 publication Critical patent/EP3111723A1/fr
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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/06Control, e.g. of temperature, of power
    • H05B6/062Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/06Control, e.g. of temperature, of power
    • H05B6/062Control, e.g. of temperature, of power for cooking plates or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00Stoves or ranges heated by electric energy
    • F24C7/06Arrangement or mounting of electric heating elements
    • F24C7/062Arrangement or mounting of electric heating elements on stoves
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/10Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12Cooking devices
    • H05B6/1209Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05Heating plates with pan detection means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07Heating plates with temperature control means

Definitions

  • the invention relates to a method for operating a hob according to the preamble of claim 1 and a hob with a plurality of heating elements according to the preamble of claim 12.
  • So-called matrix cooktops with a multiplicity of small and identically constructed heating elements are known from the state of the art, which are arranged in a grid.
  • One of the distinguishing features of such cooktops is the ability to form from one or more such heating elements a flexible heating zone adapted to the size, shape and position of a cookware element placed on the cooktop. The user can therefore position the cookware element largely freely, and the assignment of different heating elements, in particular inductors of an induction hob, to the cookware element is automatically such that those heating elements that can heat the cookware element most effectively, this cookware element or on this cookware element be assigned adapted heating zone.
  • the pamphlets WO 2009/049989 A1 and EP2211591 A1 disclose a method for operating a hob according to the preamble of claim 1.
  • the invention has for its object to provide a working method for operating a hob with freely definable heating zones, which has improved ease of use.
  • the invention is particularly based on a method for operating a hob with a plurality of heating elements.
  • the method comprises detecting a cookware element by a detection arrangement, forming a heating zone adapted to the detected cookware element from one or more heating elements, and setting at least one setpoint temperature of the heating zone by means of a user interface.
  • an operation involving the removal of the cooking utensil element from an initial position and the subsequent placement of the cooking utensil element in an end position is detected by the detection arrangement.
  • the control unit with the aid of the detection arrangement identifies the process as a whole and as a unit and does not interpret the process of removing the cooking utensil element and the process of setting up the cooking utensil element as two separate processes.
  • the method therefore further comprises associating the operation with one of at least two cases by the control unit. The process is interpreted in a first case as a movement of the same cooking utensil element from the initial position to the end position.
  • the control unit automatically recognizes that it is not about moving the same cooking utensil element, but removing a cooking utensil and setting up a new cookware element.
  • the control unit moves the heating zone from the region of the initial position into the region of the end position.
  • the heating zone new heating elements are assigned and at least a portion of the heating zone originally assigned heating elements is removed or deactivated.
  • the originally set target temperature for the displaced heating zone is taken over by the control unit.
  • the target temperature is set by the control unit to a default value. The default value is in particular zero.
  • the hob is operated with a temperature control.
  • a setpoint temperature is set indirectly by the user, for example by selecting a cooking program, or directly, for example by directly setting the desired cooking temperature.
  • the actual temperature determined with the aid of temperature sensors is used by the hob as a control parameter.
  • further operating parameters of the heating zone can be adopted, for example timer settings, such as a remaining running time. If on the heating zone more complex cooking programs cooking programs that have been interrupted by the movement of the cookware can be continued on the displaced heating zone.
  • control unit determines a further operating parameter of the process and assigns the process in the first case depending on the further operating parameter to one of at least two sub-cases:
  • the at least one set target temperature together with at least one associated control parameter for the relocated heating zone is taken over.
  • the at least one set target temperature for the displaced heating zone is adopted and at least one associated control parameter is newly determined as a function of the further operating parameter.
  • the further operating parameter is, for example, a cooking program, a temperature range and / or a sensor type.
  • the sensor type available for the displaced heating zone for example, the cooking temperature or the frying temperature sensor, recalibration of the temperature control is required. This circumstance is taken into account by the training.
  • the assignment of the process to one of the cases takes place on the basis of at least one parameter which can be set by the user via the user interface.
  • the control unit can determine a parameter for the process, compare this parameter with the parameter and perform the assignment or case distinction depending on the result of this comparison.
  • the control unit may determine suitable parameters, for example, if it determines a spatial distance between the starting position and the end position of the process. This distance can be used when assigning the operation to the different cases. Shifts by comparatively short distances are often unintentional, so that the adoption of the operating parameters of the heating zone corresponds to the user's request.
  • control unit may also determine a time interval between the removal of the cooking utensil element from the initial position and the setting up of the cooking utensil element in the final position and the assignment of the process depending on the time interval.
  • a large time interval speaks in favor of the user's desire to interrupt the original cooking process and to start a new cooking process, while moving or changing the cooking utensil element in a short time interval usually reflects the user's desire not to cook as much as possible interrupt.
  • the time in which the converted or displaced cookware element remains unheated can be shortened by the automatic adoption of the operating parameters.
  • the case of a displacement of the same cooking utensil element can be easily distinguished from the setting up of another cooking utensil element by the control unit, when the control unit determines a size and / or shape of the cookware element removed from the initial position with a size and / or shape of the cooking utensil element placed on the end position compares. If the differences in size and shape are within a measurement accuracy of the detection assembly, it is likely to be the same cookware element, while otherwise being a different cookware element, so that adoption of the operating parameters for the new cookware element is unlikely to be desired.
  • Another feature that can be used to identify the cooking utensil element is the material properties of the cookware element. These can be measured by the detection arrangement and used by the control unit to identify the cookware element.
  • the user can select by an input in the user interface, whether the set operating parameters or the set operating parameters for the relocated heating zone to be adopted or not.
  • the intervention of the user in cases of doubt, a misinterpretation of the process, which could upset the user, can be avoided.
  • control unit can set a speed of movement of the cookware element from the initial position to the final position detect and determine the temperature of the cookware element. Both parameters can be used to classify the process and / or to identify the cookware element.
  • the cooktop comprises a plurality of heating elements, a detection arrangement, a control unit and a user interface.
  • FIG. 1 shows an induction hob with a plurality of heating elements designed as inductors 10.
  • the inductors 10 are arranged in a uniform grid, identical in construction and can be operated by a control unit 18 substantially independently of each other.
  • the control unit 18 is a universally programmable arithmetic unit that generates control signals for operating one or more power electronics assemblies 28.
  • the power electronics assemblies 28 include a plurality of inverters 40, a filter 42, and a rectifier 44.
  • a switching arrangement 48 connects the inverters 40 to different inductors 10.
  • the inverters 40 generate a high-frequency heating current that flows through the inductors 10 and generates a high-frequency magnetic field.
  • the magnetic field creates eddy currents in a bottom of a cooking utensil element 12 placed on the hob, which heat the cookware element 12.
  • the heating power generated by the inductors 10 may be adjusted by varying a frequency and / or amplitude of the heating current generated by the inverters 40.
  • the control unit 18 uses the inductors 10 as a detection arrangement 14 for detecting the cookware elements 12 placed on the hob. For this purpose, the control unit 18 measures the influence of the cookware elements 12 on the inductance of the inductors 10 and of the inductors 10 and the bottom of the cookware element 12 existing overall system. Furthermore, the electrical losses in the bottom of the cookware element 12 lead to a frequency-dependent resistance or loss angle in the inductors 10. These loss angles can be used in addition to the detection of the cookware element 12 or for measuring material properties of its ferromagnetic ground.
  • the control unit 18 can in particular determine a degree of overlap between the bottom of the cookware element 12 and each of the inductors 10 and determine the position, size and shape of the bottom of the cookware element 12 from these measured variables. Depending on these data, the control unit 18 forms for each cookware element 12 a heating zone 16 which is adapted in size, shape and position to the size, shape and position of the detected cookware element 12. The control unit 18 combines those inductors 10, which are covered by the bottom of the cooking utensil element 12 for more than a predetermined proportion, to the heating zone 16 which is assigned to the relevant cookware element 12.
  • this comprises a user interface 26, on which the control unit 18 visualizes the heating zones 16 adapted to the detected cookware elements 12.
  • the user can set a desired temperature and other operating parameters, for example a timer running time or a time for automatically switching off the heating zone 16, via the user interface 26 to each heating zone 16.
  • the hob determines an actual temperature.
  • the actual temperature is formed by a detected cooking temperature, ie in particular by a cooking utensil temperature.
  • the hob has sensor units arranged below the hob plate and having at least one temperature sensor. Alternatively or additionally, it would also be possible to provide a sensor unit which is arranged at least partially above the hob plate and detects the actual temperature by means of infrared.
  • a temperature automatic unit is provided to control the actual temperature to the target temperature.
  • the temperature automatic unit can also be designed as a cooking program automatic unit that regulates different cooking programs with different temporal temperature profiles.
  • FIG. 2 schematically shows a procedure for a temperature control.
  • the user sets a desired target temperature via a user interface.
  • the set target temperature is compared via a differentiator 30 with the actual temperature.
  • a delta temperature target temperature - actual temperature is determined.
  • a control unit 32 determines the required heating power to achieve the delta temperature and controls the heating zone accordingly.
  • a cookware temperature is determined by a temperature sensor 34. Since the temperature sensor can not determine the temperature of the cooking product in this exemplary embodiment, a temperature of the cooking appliance determines a temperature of the cooking appliance. This cooking temperature is the actual temperature and is supplied to the differentiator 30. In a predetermined time cycle, this control loop is repeated until the heating of the heating zone is stopped.
  • the parameters of the control unit 32 and the temperature estimation unit 36 should be calibrated depending on a selected cooking program and the sensor type used.
  • a cooking sensor is designed for a lower temperature range below 120 ° Celsius, as a Bratsensor, which is designed for a temperature range well above 120 ° Celsius.
  • a cooking program for steaming vegetables differs significantly from a cooking program for frying potatoes. In the first case, a gentle and even heating in a lower temperature range is important, while in the second case it is important to heat up quickly and maintain a high temperature range.
  • FIG. 3 shows a schematic representation of a process sequence according to the invention.
  • the temperature control of a heating zone of a hob is started after the user has entered a desired set temperature.
  • the control unit and the temperature estimation unit are switched off FIG. 2 calibrated 52.
  • the heating zone is briefly subjected to a predetermined power for calibration and then measured the temperature for calibration. Parameters for the calibration are determined from the relationship between this applied power and the measured temperature.
  • the heating zone as in FIG. 2 described, heated 54.
  • the detection arrangement detects the position, size and shape of the cookware element in regular cycles, in particular with cycle times of less than one second.
  • the measurement data are stored so that a change in position can be detected immediately by comparing the previous measurement data with the current measurement data.
  • a timer or time detection algorithm of the control unit starts to run. If, within a predetermined time of about 10 seconds, the setting up of the cookware element in the end position is detected, the method is continued with step 60. Otherwise, the cooking process is ended 58.
  • step 60 further operating parameters, for example the selected cooking program, are determined by the control unit. If the selected cooking program is provided for a temperature range of less than 110 ° C, and thus the temperature sensors installed in a regular grid between the inductors are used for the measurement, the control parameters remain unchanged and can be adopted unchanged for the temperature control of the new heating zone selected cooking program for a temperature range of over 120 ° C provided 64 and thus irregularly built Brattemperatursensoren be used for the measurement, the control parameters for the new heating zone at least partially recalibrated 68. In this embodiment, the recalibration of the control parameters is dependent on the relative position between the Brattemperatursensoren and the cooking utensils. The remaining control parameters remain unchanged 70.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
  • Baking, Grill, Roasting (AREA)
  • Induction Heating Cooking Devices (AREA)

Claims (12)

  1. Procédé de fonctionnement d'une table de cuisson dotée d'une pluralité d'éléments chauffants (10), comprenant les étapes :
    - détection d'un élément de récipient de cuisson (12) par un dispositif de détection (14),
    - formation au moyen d'une unité de commande (18) d'une zone de chauffage (16) adaptée à l'élément de récipient de cuisson (12) détecté, à partir d'un ou de plusieurs éléments chauffants (10), et caractérisé par
    - le réglage d'au moins une température théorique de la zone de chauffage (16) au moyen d'une interface utilisateur (26),
    les étapes ;
    - détection d'une opération qui comprend le retrait de l'élément de récipient de cuisson (12) d'une position initiale et la pose suivante d'un élément de récipient de cuisson (12) pendant un temps prédéfini dans une position finale,
    - attribution automatique, par l'unité de commande (18), de l'opération à l'un d'au moins deux cas au moyen d'une identification d'une modification de données de mesure du dispositif de détection, qui est supérieure à une valeur seuil déterminée par une exactitude de mesure du dispositif de détection, l'opération :
    i) étant interprétée, au moins dans un premier cas, en tant qu'un mouvement du même élément de récipient de cuisson (12) de la position initiale en la position finale,
    ii) étant interprétée, dans un cas supplémentaire, en tant qu'un retrait de l'élément de récipient de cuisson (12) de la position initiale et en tant que la pose d'un autre élément de récipient de cuisson dans la position finale,
    - déplacement de la zone de chauffage (16) dans la partie de la position finale suite à l'opération et prise en compte, par l'unité de commande (18), de l'au moins une température théorique réglée pour la zone de chauffage (16) déplacée, au moins dans le premier cas,
    - mise, par l'unité de commande (18), de la température théorique sur une valeur spécifiée, dans le cas supplémentaire.
  2. Procédé selon la revendication précédente, caractérisé en ce que l'unité de commande (18) détecte un paramètre de fonctionnement supplémentaire de l'opération et attribue l'opération dans le premier cas, en fonction du paramètre de fonctionnement supplémentaire, à l'un d'au moins deux cas inférieurs,
    - dans un premier cas inférieur, l'au moins une température théorique réglée étant prise en compte, conjointement avec au moins un paramètre de régulation correspondant, pour la zone de chauffage (16) déplacée,
    - dans un deuxième cas inférieur, l'au moins une température théorique réglée étant prise en compte pour la zone de chauffage (16) déplacée et au moins un paramètre de régulation correspondant étant de nouveau déterminé en fonction du paramètre de fonctionnement supplémentaire.
  3. Procédé selon la revendication 2, caractérisé en ce que le paramètre de fonctionnement supplémentaire est un programme de cuisson, une plage de température et/ou un type de capteur.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'attribution de l'opération à l'un des cas est réalisée à l'aide d'au moins un paramètre réglable par un utilisateur.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de commande (18) détermine un écart spatial (d) entre la position initiale et la position finale de l'opération, l'attribution de l'opération étant réalisée en fonction de l'écart spatial (d).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de commande (18) détermine un écart temporel (t) entre le retrait de l'élément de récipient de cuisson (12) de la position initiale et la pose de l'élément de récipient de cuisson (12) dans la position finale de l'opération, l'attribution de l'opération étant réalisée en fonction de l'écart temporel (t).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de commande (18) compare une grandeur de l'élément de récipient de cuisson (12) retiré de la position initiale et une grandeur de l'élément de récipient de cuisson (12) posé sur la position finale, l'attribution de l'opération étant réalisée en fonction du résultat de cette comparaison.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé par la mesure de caractéristiques de matériaux de l'élément de récipient de cuisson (12) par le dispositif de détection (14) et par l'identification de l'élément de récipient de cuisson (12) en fonction des caractéristiques de matériaux de l'élément de récipient de cuisson (12).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que dans au moins un cas, l'utilisateur sélectionne par une entrée dans l'interface utilisateur (26) si l'au moins une température théorique réglée est prise en compte pour la zone de chauffage (16) déplacée.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de commande (18) détecte une vitesse d'un mouvement de l'élément de récipient de cuisson (12) de la position initiale en la position finale et attribue l'opération à un cas en fonction de la vitesse.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé par la mesure d'une température de l'élément de récipient de cuisson (12) par le dispositif de détection (14) et par l'identification de l'élément de récipient de cuisson (12) en fonction de la température de l'élément de récipient de cuisson (12).
  12. Table de cuisson dotée d'une pluralité d'éléments chauffants (10), comprenant :
    - un dispositif de détection (14) destiné à détecter un élément de récipient de cuisson (12),
    - une unité de commande (18) qui est conçue pour former une zone de chauffage (16) adaptée à l'élément de récipient de cuisson (12) détecté, à partir d'un ou de plusieurs éléments de chauffage (10), et caractérisée par
    - une interface utilisateur (26) pour le réglage d'au moins une température théorique de la zone de chauffage (16),
    le dispositif de détection (14) et l'unité de commande (18) étant conçus
    - pour détecter une opération qui comprend le retrait de l'élément de récipient de cuisson (12) d'une position initiale et la pose suivante d'un élément de récipient de cuisson (12) pendant un temps prédéfini dans une position finale,
    - pour attribuer l'opération à l'un d'au moins deux cas, l'unité de commande (18), au moyen d'une identification d'une modification de données de mesure du dispositif de détection, qui est supérieure à une valeur seuil déterminée par une exactitude de mesure du dispositif de détection, interprétant automatiquement l'opération
    i) au moins dans un premier cas, en tant qu'un mouvement du même élément de récipient de cuisson (12) de la position initiale en la position finale,
    ii) dans un cas supplémentaire, en tant qu'un retrait de l'élément de récipient de cuisson (12) de la position initiale et en tant que la pose d'un autre élément de récipient de cuisson dans la position finale,
    - pour déplacer la zone de chauffage (16) au moins dans le premier cas dans la partie de la position finale et pour prendre en compte l'au moins une température théorique réglée pour la zone de chauffage (16) déplacée,
    - pour mettre, dans le cas supplémentaire, la température théorique sur une valeur spécifiée.
EP15710000.9A 2014-02-28 2015-02-05 Table de cuisson comprenant une multitude d'éléments chauffants Active EP3111723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201430282A ES2544515B1 (es) 2014-02-28 2014-02-28 Campo de cocción con varios elementos de calentamiento.
PCT/IB2015/050875 WO2015128759A1 (fr) 2014-02-28 2015-02-05 Table de cuisson comprenant une multitude d'éléments chauffants

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Publication Number Publication Date
EP3111723A1 EP3111723A1 (fr) 2017-01-04
EP3111723B1 true EP3111723B1 (fr) 2018-09-26

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US (1) US10448461B2 (fr)
EP (1) EP3111723B1 (fr)
ES (2) ES2544515B1 (fr)
WO (1) WO2015128759A1 (fr)

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WO2015128759A1 (fr) 2015-09-03
US20170055318A1 (en) 2017-02-23
US10448461B2 (en) 2019-10-15
ES2544515A1 (es) 2015-08-31
ES2544515B1 (es) 2016-06-09
ES2693501T3 (es) 2018-12-12
EP3111723A1 (fr) 2017-01-04

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