EP3065505B1 - Method for controlling a cooking appliance and associated cooking appliance - Google Patents

Method for controlling a cooking appliance and associated cooking appliance Download PDF

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Publication number
EP3065505B1
EP3065505B1 EP16157136.9A EP16157136A EP3065505B1 EP 3065505 B1 EP3065505 B1 EP 3065505B1 EP 16157136 A EP16157136 A EP 16157136A EP 3065505 B1 EP3065505 B1 EP 3065505B1
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EP
European Patent Office
Prior art keywords
cooking
cooking area
vessel
cooking zone
container
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EP16157136.9A
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German (de)
French (fr)
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EP3065505A1 (en
Inventor
Didier Gouardo
Jean-Marc Bugeia
Xavier André
Aurélien BARBEROUSSE
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Groupe Brandt SAS
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Groupe Brandt SAS
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Publication of EP3065505A1 publication Critical patent/EP3065505A1/en
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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
    • 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 present invention relates to a method for controlling a cooking appliance comprising several induction cooking zones.
  • It also relates to a cooking appliance, and for example a hob, adapted to implement the control method.
  • the present invention relates to the field of induction cooktops comprising several induction cooking zones.
  • a cooking appliance In the field of domestic hobs, a cooking appliance generally comprises two, three or four induction cooking zones, distributed in the hob. These cooking zones are generally independent of each other in operation.
  • the user thus has several cooking zones to heat one or more containers, independently of each other, according to a setpoint power associated with each cooking zone.
  • Each cooking hearth can have a different size, and for example consist of one or more inductive coils of different size and shape.
  • each induction cooking zone delivers a predetermined maximum theoretical power.
  • the correct adaptation of the container to each cooking zone is not necessarily synonymous equality between the dimension of the bottom of the container and the dimension of the induction cooking zone.
  • the shape of the container also have a significant influence on the behavior of the container with respect to induction. and thus on the maximum power delivered to the container by each cooking zone.
  • the maximum power delivered to the receptacle can vary significantly.
  • the cooking time is lengthened, in particular during the phases of raising the temperature or boiling the contents of the container.
  • the maximum power delivered by the cooking hearth may be too low to allow cooking of the frying or grilling type.
  • the efficiency of the cooking hearth is less good when the lengthening of the cooking time increases the heat exchanges of the container and of the cooking hearth with the environment.
  • control method implemented in this document EP 2 706 816 is based on the comparison of the power delivered to a container placed on the cooking zone and the theoretical maximum power delivered by this cooking zone.
  • the user is then prompted to move the container to another cooking zone, for which the power delivered to the container is close to the theoretical maximum power delivered by the cooking zone.
  • the object of the present invention is to solve at least one of the aforementioned drawbacks and to improve a method of controlling a cooking appliance making it possible to check the correct adaptation of an induction cooking zone to the heating of a container. predetermined.
  • the determination of the suitable or unsuitable character of the first cooking zone is implemented by comparing a representative value the power delivered to the container and a value representative of the setpoint power.
  • the control method according to the invention thus takes into account the value of the setpoint power desired by the user and not the theoretical maximum power delivered by the cooking zone.
  • the monitoring of the adaptation of the cooking hearth to the heating of the container is carried out as closely as possible to the conditions of use of the cooking hearth by the user, and not only from the theoretical characteristics of the power delivered by this cooking hearth. cooking.
  • the first cooking zone can be considered suitable for heating the container when the difference between the measured value and the value representative of the setpoint power is less than the predefined threshold, even if the power delivered to the container is very far from the theoretical maximum power delivered by the first cooking zone.
  • control method comprises a step of issuing an unsuitable cooking zone warning signal in association with the first cooking zone when the ratio between the measured value and the value representative of the setpoint power is lower than said predefined threshold.
  • control method further comprises, when the ratio between the measured value and the value representative of the setpoint power is lower than said predefined threshold, a step of emitting a warning signal unsuitable cooking zone in association with said first cooking zone if at least one cooking zone, different from the first cooking zone, is determined as available and suitable for heating the container in the identification step.
  • the unsuitable cooking zone warning signal is emitted for the user when there is at least one cooking zone, different from the first cooking zone, available and suitable for heating the container, in order to avoid informing the user of a possible unsuitability of the first cooking zone to heat the container when no other cooking zone, available and suitable for heating the container, can be used.
  • control method further comprises a step of transmitting a suitable cooking zone warning signal in association with said at least one cooking zone available and suitable for heating the recipient.
  • This embodiment allows the user to be informed of the existence of a cooking zone available and suitable for heating the container, and thus to move the container if he wishes to this cooking zone suitable for heating. the recipient.
  • the step of measuring a value representative of a power delivered to the receptacle placed on the first cooking zone is implemented after actuating a dedicated button of the device Cooking.
  • the user can thus, when he so desires, check the adaptation of the cooking zone chosen to the container covering the latter.
  • the step of measuring a value representative of a power delivered to the receptacle placed on the first cooking zone is implemented automatically, after the step of acquiring a setpoint power associated with this first zone Cooking.
  • the control method thus makes it possible to check the adaptation of the chosen cooking zone and of the setpoint power associated with this cooking zone on each acquisition or modification of the value of the setpoint power associated with the cooking zone.
  • the unsuitable cooking zone warning signal is information displayed on a control panel of the cooking appliance, in association with the unsuitable cooking zone.
  • the present invention relates to a cooking appliance comprising several induction cooking zones and control means configured to implement the control method described above.
  • This cooking appliance has characteristics and advantages similar to those described above in relation to the control method.
  • the cooking appliance is typically a hob 10 comprising several induction cooking zones F1, F2, F3.
  • the hob 10 comprises three induction cooking zones F1, F2, F3 distributed in the hob.
  • Each cooking zone F1, F2, F3 is for example made from one or more inductive coils arranged under the cooking surface.
  • the cooking appliance comprises all the means necessary for controlling the cooking zones F1, F2, F3 in operation.
  • a control panel 11 for example tactile, allows the user to adjust the setpoint power, and for example the operating time, of each cooking zone F1, F2, F3 independently.
  • each induction cooking zone is associated with means for detecting a container placed above each cooking zone.
  • receptacle detection means are generally implemented from the inductors constituting the cooking hearth and make it possible, also in a conventional manner, to detect the presence or absence of a receptacle R opposite the cooking hearth considered. .
  • each cooking hearth F1, F2, F3 can be identified in the cooking plan, for example using a screen-printed outline schematizing the overall size of the cooking hearth F1, F2, F3.
  • each cooking zone F1, F2, F3 consists of an inductor wound in a spiral
  • the size of the cooking zone corresponds substantially to the diameter of the disk formed by the inductor.
  • the size of cooking zones F1, F2, F3 can vary between 160 and 210 mm in diameter.
  • each cooking zone F1, F2, F3 varies for example between 2200 and 3100 W.
  • the cooking appliance comprises several induction cooking zones F1, F2, F3 which each deliver a different theoretical maximum power.
  • a first cooking zone F1 has a theoretical maximum power P1Max greater than a theoretical maximum power P2Max associated with a second cooking zone cooking F2, itself greater than a theoretical maximum power P3Max associated with a third cooking hearth F3.
  • the user places, for example, a container R on a first cooking zone F1 as illustrated in the situation shown schematically in figure 1 .
  • the control method comprises, after the start-up of the first cooking zone F1, a first step of acquisition S1 of a setpoint power P1c associated with the first cooking zone F1 covered with the container R.
  • this acquisition step S1 of a setpoint power can be implemented by the user from the control panel 11 using conventional setting keys for the setpoint power.
  • the user can optionally also enter a cooking duration using the setting of a timer.
  • the control method then continues with a step S2 of measuring a value representative of a power P1m delivered to the container R placed on the first cooking zone F1.
  • This step consists in measuring the power which can be delivered to the container R by the first cooking zone F1 when the latter is put into operation according to the setpoint power P1c fixed by the user.
  • the inductor(s) constituting the cooking zone are put into operation in a conventional manner by a frequency-controlled inverter.
  • the inverter control frequency is high, for example of the order of 50 kHz.
  • this value decreases so as to gradually increase the power delivered by the inductor(s) constituting the first cooking zone F1 until it substantially reaches the value of the setpoint power P1c.
  • the power P1m delivered to the container R placed on the first cooking zone F1 is then measured.
  • the value of this measured power P1m depends in particular on the adaptation of the first cooking zone F1 to the container R.
  • the relative size of the container R and the first cooking zone F1 has an influence on the behavior of the inductor placed under the container R.
  • the quality of the material used to make the container R vis-à-vis induction heating, the shape of the container, the structure of the bottom of the container, and possibly the presence of a coating can influence the adaptation of the container R for its induction heating by the first cooking zone F1.
  • the control method then includes a step S3 of comparing the measured value P1m with a value representative of the setpoint power P1c.
  • values representing the setpoint power P1c and the measured power P1m are for example electrical values measurable by the control system, and for example a voltage or current value measured at the level of the circuit formed by the inductor and the container placed on the first cooking zone F1.
  • the first cooking zone F1 is classified as suitable for heating the container R when a ratio between the measured value P1m and the value representative of the setpoint power P1c is greater than a predefined threshold .
  • this ratio may correspond to 85%.
  • the first cooking zone F1 is considered suitable for heating the receptacle R and the method for controlling the cooking appliance continues in a conventional manner by the use in operation of the first cooking zone F1 to heat the container R.
  • the control method continues with an identification step S4, among the other induction cooking zones , at least one available cooking zone suitable for heating the container R.
  • This identification step S4 is illustrated, without limitation, according to a more detailed embodiment at picture 3 .
  • this identification step S4 consists in comparing the measured value P1m and a value representative of the theoretical maximum power P2Max, P3Max delivered by the other cooking zones F2, F3 of the hob, different from the first cooking zone. cooking F1.
  • the identification step S4 first of all comprises a step of comparison S41 adapted to check whether the ratio between the measured value P1m and the value representative of the setpoint power P1c is lower than another predefined threshold, and here fixed at 70%.
  • This verification step S41 thus makes it possible to verify whether or not the measured power P1m is very far from the setpoint power P1c requested by the user. If not, we will then test the adaptation of the second cooking zone F2, the closest in terms of dimensioning and theoretical maximum power to the first cooking zone F1. Conversely, if the difference between the measured power P1m and the setpoint power P1c is very large, the possibility of using the third cooking zone F3 with the lowest theoretical maximum power P3Max will be directly tested.
  • comparison steps S42, S43 are implemented respectively to compare the measured value P1m and a value representative of a theoretical maximum power P2Max , P3Max delivered by each cooking zone F2, F3.
  • cooking zones F2, F3 are classified as a suitable cooking zone when the ratio between the measured value P1m and the value representative of the theoretical maximum power P2Max, P3Max is lower than a second predefined threshold, here fixed as non-limiting example to 95%.
  • a container detection step S44, S45 is implemented on these cooking zones F2, F3 in order to determine whether the second and third cooking zones F2, F3 are available cooking zones.
  • a classification step S46, S47 makes it possible to classify the second cooking zone F2 or the third cooking zone F3, when it is available, as a cooking zone suitable for heating the container R when the ratio between the measured value P1m and the value representative of the theoretical maximum power P2Max, P3Max associated with each cooking zone F2, F3 is lower than the second predefined threshold.
  • a step S5 of transmitting a zone warning signal unsuitable cooking method is implemented.
  • the unsuitable cooking zone warning signal is emitted in association with the first cooking zone F1.
  • the user can be informed of the unsuitability of the first cooking zone F1 for heating the container R, and this only if there is in the hob 10 another induction cooking zone, capable of heating the container. R under higher adaptation conditions.
  • the step S5 of issuing the warning signal can be implemented visually for the attention of the user.
  • the unsuitable hob warning signal is information displayed on the control panel 11 of the hob 10, in association with the unsuitable hob.
  • a “no” signal is displayed in a display zone dedicated to displaying the setpoint power, associated with each cooking zone F1, F2, F3.
  • a "no" signal is displayed in the setpoint power display zone dedicated to the first cooking zone F1.
  • control method continues, following the emission of such an unsuitable cooking zone warning signal, following the possible movement of the container R by the user on the hob 10.
  • a detection step S6 of the withdrawal of the container R from the first cooking zone F1 is implemented for a predetermined period of time ⁇ T1, equal for example to 10s.
  • the control method repeats the identification steps S4 of an available cooking zone suitable for heating the container R and the emission step S5 d an unsuitable cooking zone warning signal for the predetermined period of time ⁇ T1.
  • the control method continues with the use of the first cooking zone F1 to heat the container R in the conventional manner, at the setpoint power P1c requested by the user.
  • a step S7 for activating container detection is implemented on the hob 10.
  • the container detection activation step S7 is implemented in a conventional manner in a hob, by testing the behavior of each inductor constituting each cooking zone F1, F2, F3 of the hob 10 to verify whether or not it is covered with a container R.
  • a detection step S8 is implemented to detect the presence of the container R on another induction cooking zone Fi, different from the first cooking zone F1.
  • the detection step S8 is also implemented iteratively for a predetermined period of time ⁇ T2, equal for example to 10s.
  • a test step S10 makes it possible to check whether this cooking zone Fi corresponds to a zone available classified as a cooking zone suitable for heating the container R during the identification step S4 of an available cooking zone suitable for heating the container R.
  • step S5 of issuing an unsuitable cooking zone warning signal is implemented in association with this other cooking zone Fi to indicate to the user that this other cooking zone is not is not identified as an available fireplace suitable for heating the container R.
  • the cooking hearth Fi covered by the container R corresponds to an available hearth suitable for heating the container during the identification step S4
  • the cooking hearth Fi is set operation at the setpoint power P1c associated with the first cooking zone F1 and a step S11 of extinguishing the first cooking zone F1 is implemented.
  • the step S2 of measuring a value representative of a power delivered to the container R placed on the first cooking zone F1 is implemented automatically after the step S1 of acquiring the setpoint power P1c associated with the first cooking zone F1.
  • the measurement step S2 and all of the following steps of the control method could be implemented after actuating a dedicated key 12 of the cooking appliance 10.
  • the control method then comprises a preliminary step for detect the actuation of this dedicated button 12 of the cooking appliance 10. In the absence of actuation of the dedicated button 12, the process for controlling and heating the container R continues in a conventional manner on the first hearth of F1 cooking regardless of the quality of the adaptation.
  • the user can at any time actuate the dedicated key 12 to check the adaptation of the first cooking zone F1 to the heating of the container R according to the requested setpoint power.
  • control method makes it possible to determine whether a first cooking zone F1 is well suited to heating a container R and, if not, to emit an unsuitable cooking zone warning signal for the attention of the user so that he can choose a more suitable cooking zone.
  • the values chosen to illustrate the ratios used to determine whether a cooking zone is suitable or not are indicative and may vary, in particular depending on the size and power of each cooking zone.
  • the method described above with reference to the picture 2 can also be modified after the steps of identification S4 and emission S5 of an unsuitable cooking zone warning signal in association with the first cooking zone F1.
  • the control method may further comprise a step of transmitting a suitable cooking zone warning signal in association with one of the cooking zones F2, F3 available and identified as suitable for heating the container R after the step S4 identification as implemented for example according to the embodiment of the picture 3 .
  • the adapted cooking zone warning signal can be information displayed on the control panel 11 of the cooking appliance 10, in association with the adapted cooking zone.
  • a different signal such as "ok" can be displayed on another display zone associated with one of the other two cooking zones F2, F3.

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

Description

La présente invention concerne un procédé de commande d'un appareil de cuisson comprenant plusieurs foyers de cuisson à induction.The present invention relates to a method for controlling a cooking appliance comprising several induction cooking zones.

Elle concerne également un appareil de cuisson, et par exemple une table de cuisson, adapté à mettre en œuvre le procédé de commande.It also relates to a cooking appliance, and for example a hob, adapted to implement the control method.

De manière générale, la présente invention concerne le domaine des tables de cuisson à induction comprenant plusieurs foyers de cuisson à induction.In general, the present invention relates to the field of induction cooktops comprising several induction cooking zones.

Dans le domaine des tables de cuisson domestiques, un appareil de cuisson comprend généralement deux, trois ou quatre foyers de cuisson à induction, répartis dans le plan de cuisson. Ces foyers de cuisson sont généralement indépendants les uns des autres en fonctionnement.In the field of domestic hobs, a cooking appliance generally comprises two, three or four induction cooking zones, distributed in the hob. These cooking zones are generally independent of each other in operation.

L'utilisateur dispose ainsi de plusieurs foyers de cuisson pour chauffer un ou plusieurs récipients, indépendamment les uns des autres, selon une puissance de consigne associée à chaque foyer de cuisson.The user thus has several cooking zones to heat one or more containers, independently of each other, according to a setpoint power associated with each cooking zone.

Chaque foyer de cuisson peut avoir une taille différente, et par exemple être constitué d'un ou plusieurs bobinages inductifs de taille et de forme différentes.Each cooking hearth can have a different size, and for example consist of one or more inductive coils of different size and shape.

En fonction de la taille du bobinage inductif, éventuellement du nombre de bobinages mis en œuvre dans le foyer de cuisson, et plus généralement des paramètres de l'inducteur, chaque foyer de cuisson à induction délivre une puissance maximale théorique prédéterminée.Depending on the size of the inductive coil, possibly the number of coils implemented in the cooking zone, and more generally the parameters of the inductor, each induction cooking zone delivers a predetermined maximum theoretical power.

Il est ainsi fréquent de configurer l'appareil de cuisson de telle sorte que les foyers de cuisson aient des puissances maximales théoriques différentes, comprises par exemple entre 2200 et 3000 Watts.It is thus common to configure the cooking appliance in such a way that the cooking zones have different theoretical maximum powers, comprised for example between 2200 and 3000 Watts.

Pour les foyers de cuisson à induction, dans la mesure où la transmission de chaleur au récipient n'est pas réalisée par conduction mais par induction dans le fond magnétique du récipient, la bonne adaptation du récipient sur chaque foyer de cuisson n'est pas nécessairement synonyme d'une égalité entre la dimension du fond du récipient et la dimension de foyer de cuisson à induction.For induction cooking zones, insofar as the transmission of heat to the container is not carried out by conduction but by induction in the magnetic base of the container, the correct adaptation of the container to each cooking zone is not necessarily synonymous equality between the dimension of the bottom of the container and the dimension of the induction cooking zone.

En effet, la forme du récipient, le type de matériau utilisé (alliage, fonte, acier, ...), la structure du fond du récipient ont également une influence importante sur le comportement du récipient vis-à-vis de l'induction et ainsi sur la puissance maximale délivrée au récipient par chaque foyer de cuisson.Indeed, the shape of the container, the type of material used (alloy, cast iron, steel, ...), the structure of the bottom of the container also have a significant influence on the behavior of the container with respect to induction. and thus on the maximum power delivered to the container by each cooking zone.

Ainsi, en fonction du récipient utilisé sur un foyer de cuisson donné de l'appareil de cuisson, la puissance maximale délivrée au récipient peut varier de façon importante.Thus, depending on the receptacle used on a given cooking hearth of the cooking appliance, the maximum power delivered to the receptacle can vary significantly.

Lorsque la puissance maximale délivrée au récipient est faible, le temps de cuisson s'en trouve allongé, notamment lors des phases de montée en température ou d'ébullition du contenu du récipient.When the maximum power delivered to the container is low, the cooking time is lengthened, in particular during the phases of raising the temperature or boiling the contents of the container.

Par ailleurs, la puissance maximale délivrée par le foyer de cuisson peut être trop faible pour permettre des cuissons du type friture ou grillade.Furthermore, the maximum power delivered by the cooking hearth may be too low to allow cooking of the frying or grilling type.

De manière générale, le rendement du foyer de cuisson est moins bon dès lors que l'allongement du temps de cuisson augmente les échanges thermiques du récipient et du foyer de cuisson avec l'environnement.In general, the efficiency of the cooking hearth is less good when the lengthening of the cooking time increases the heat exchanges of the container and of the cooking hearth with the environment.

On connaît dans le document EP 2 706 816 un appareil de cuisson avec un système de commande permettant d'indiquer à l'utilisateur qu'un foyer de cuisson sur lequel est placé un récipient est mal adapté au chauffage de ce récipient.We know in the document EP 2 706 816 a cooking appliance with a control system making it possible to indicate to the user that a cooking hearth on which a container is placed is unsuitable for heating this container.

Le procédé de commande mis en œuvre dans ce document EP 2 706 816 est fondé sur la comparaison de la puissance délivrée à un récipient posé sur le foyer de cuisson et la puissance maximale théorique délivrée par ce foyer de cuisson.The control method implemented in this document EP 2 706 816 is based on the comparison of the power delivered to a container placed on the cooking zone and the theoretical maximum power delivered by this cooking zone.

Ces deux valeurs de puissance, réelle et théorique, sont affichées sur le bandeau de commande de l'appareil de cuisson et permettent à l'utilisateur de vérifier si le transfert de puissance est optimal.These two power values, real and theoretical, are displayed on the control panel of the cooking appliance and allow the user to check whether the power transfer is optimal.

L'utilisateur est alors incité à déplacer le récipient sur un autre foyer de cuisson, pour lequel la puissance délivrée au récipient est proche de la puissance maximale théorique délivrée par le foyer de cuisson.The user is then prompted to move the container to another cooking zone, for which the power delivered to the container is close to the theoretical maximum power delivered by the cooking zone.

La présente invention a pour but de résoudre au moins l'un des inconvénients précités et d'améliorer un procédé de commande d'un appareil de cuisson permettant de vérifier la bonne adaptation d'un foyer de cuisson à induction au chauffage d'un récipient prédéterminé.The object of the present invention is to solve at least one of the aforementioned drawbacks and to improve a method of controlling a cooking appliance making it possible to check the correct adaptation of an induction cooking zone to the heating of a container. predetermined.

A cet effet, la présente invention concerne un procédé de commande d'un appareil de cuisson comprenant plusieurs foyers de cuisson à induction, comprenant les étapes suivantes :

  • acquisition d'une puissance de consigne associée à un premier foyer de cuisson recouvert d'un récipient ; et
  • mesure d'une valeur représentative d'une puissance délivrée audit récipient posé sur le premier foyer de cuisson ;
  • comparaison de ladite valeur mesurée et d'une valeur représentative de la puissance de consigne, le premier foyer de cuisson étant considéré comme adapté au chauffage du récipient lorsque le ratio entre la valeur mesurée et la valeur représentative de la puissance de consigne est supérieur à un seuil prédéfini.
To this end, the present invention relates to a method for controlling a cooking appliance comprising several induction cooking zones, comprising the following steps:
  • acquisition of a set power associated with a first cooking zone covered with a container; and
  • measurement of a value representative of a power delivered to said receptacle placed on the first cooking zone;
  • comparison of said measured value and a value representative of the set power, the first cooking zone being considered suitable for heating the container when the ratio between the measured value and the value representative of the set power is greater than one predefined threshold.

Le procédé de commande selon l'invention comporte en outre, lorsque ledit ratio entre ladite valeur mesurée et ladite valeur représentative de la puissance de consigne est inférieur audit seuil prédéfini, une étape d'identification, parmi lesdits plusieurs foyers de cuisson à induction, d'au moins un foyer de cuisson disponible, différent dudit premier foyer de cuisson et adapté à chauffer ledit récipient, ladite étape d'identification comprenant les sous-étapes suivantes :

  • comparaison de ladite valeur mesurée et d'une valeur représentative d'une puissance maximale théorique délivrée par ledit au moins un foyer disponible ; et
  • classification dudit au moins un foyer disponible comme un foyer de cuisson adapté lorsque le ratio entre ladite valeur mesurée et ladite valeur représentative de la puissance maximale théorique est inférieur à un second seuil prédéfini.
The control method according to the invention further comprises, when said ratio between said measured value and said value representative of the setpoint power is lower than said predefined threshold, a step of identifying, among said several induction cooking zones, d at least one cooking zone available, different from said first cooking zone and suitable for heating said container, said identification step comprising the following sub-steps:
  • comparison of said measured value and a value representative of a theoretical maximum power delivered by said at least one available household; and
  • classification of said at least one available cooking zone as a suitable cooking zone when the ratio between said measured value and said value representative of the theoretical maximum power is lower than a second predefined threshold.

Ainsi, la détermination du caractère adapté ou inadapté du premier foyer de cuisson est mise en œuvre par comparaison d'une valeur représentative de la puissance délivrée au récipient et d'une valeur représentative de la puissance de consigne.Thus, the determination of the suitable or unsuitable character of the first cooking zone is implemented by comparing a representative value the power delivered to the container and a value representative of the setpoint power.

Le procédé de commande selon l'invention prend ainsi en compte la valeur de la puissance de consigne souhaitée par l'utilisateur et non la puissance maximale théorique délivrée par le foyer de cuisson.The control method according to the invention thus takes into account the value of the setpoint power desired by the user and not the theoretical maximum power delivered by the cooking zone.

Ainsi, le suivi de l'adaptation du foyer de cuisson au chauffage du récipient est réalisé au plus proche des conditions d'utilisation du foyer de cuisson par l'utilisateur, et non uniquement à partir des caractéristiques théoriques de puissance délivrée par ce foyer de cuisson.Thus, the monitoring of the adaptation of the cooking hearth to the heating of the container is carried out as closely as possible to the conditions of use of the cooking hearth by the user, and not only from the theoretical characteristics of the power delivered by this cooking hearth. cooking.

Ainsi, le premier foyer de cuisson peut être considéré comme adapté au chauffage du récipient dès lors que l'écart entre la valeur mesurée et la valeur représentative de la puissance de consigne est inférieur au seuil prédéfini, même si la puissance délivrée au récipient est très éloignée de la puissance maximale théorique délivrée par le premier foyer de cuisson.Thus, the first cooking zone can be considered suitable for heating the container when the difference between the measured value and the value representative of the setpoint power is less than the predefined threshold, even if the power delivered to the container is very far from the theoretical maximum power delivered by the first cooking zone.

En pratique, afin d'informer l'utilisateur, le procédé de commande comprend une étape d'émission d'un signal d'avertissement de foyer de cuisson inadapté en association avec le premier foyer de cuisson lorsque le ratio entre la valeur mesurée et la valeur représentative de la puissance de consigne est inférieur audit seuil prédéfini.In practice, in order to inform the user, the control method comprises a step of issuing an unsuitable cooking zone warning signal in association with the first cooking zone when the ratio between the measured value and the value representative of the setpoint power is lower than said predefined threshold.

Selon une caractéristique de mise en œuvre, le procédé de commande comporte en outre, lorsque le ratio entre la valeur mesurée et la valeur représentative de la puissance de consigne est inférieur audit seuil prédéfini, une étape d'émission d'un signal d'avertissement de foyer de cuisson inadapté en association avec ledit premier foyer de cuisson si au moins un foyer de cuisson, différent du premier foyer de cuisson, est déterminé comme disponible et adapté à chauffer le récipient à l'étape d'identification.According to an implementation characteristic, the control method further comprises, when the ratio between the measured value and the value representative of the setpoint power is lower than said predefined threshold, a step of emitting a warning signal unsuitable cooking zone in association with said first cooking zone if at least one cooking zone, different from the first cooking zone, is determined as available and suitable for heating the container in the identification step.

Ainsi, le signal d'avertissement de foyer de cuisson inadapté est émis à l'intention de l'utilisateur lorsqu'il existe au moins un foyer de cuisson, différent du premier foyer de cuisson, disponible et adapté à chauffer le récipient, afin d'éviter d'informer l'utilisateur d'une éventuelle inadaptation du premier foyer de cuisson à chauffer le récipient lorsqu'aucun autre foyer de cuisson, disponible et adapté à chauffer le récipient, ne peut être utilisé.Thus, the unsuitable cooking zone warning signal is emitted for the user when there is at least one cooking zone, different from the first cooking zone, available and suitable for heating the container, in order to avoid informing the user of a possible unsuitability of the first cooking zone to heat the container when no other cooking zone, available and suitable for heating the container, can be used.

Dans un mode de réalisation pratique de l'invention, le procédé de commande comporte en outre une étape d'émission d'un signal d'avertissement de foyer de cuisson adapté en association avec ledit au moins un foyer de cuisson disponible et adapté à chauffer le récipient.In a practical embodiment of the invention, the control method further comprises a step of transmitting a suitable cooking zone warning signal in association with said at least one cooking zone available and suitable for heating the recipient.

Ce mode de réalisation permet à l'utilisateur d'être informé de l'existence d'un foyer de cuisson disponible et adapté à chauffer le récipient, et ainsi de déplacer le récipient s'il le souhaite sur ce foyer de cuisson adapté à chauffer le récipient.This embodiment allows the user to be informed of the existence of a cooking zone available and suitable for heating the container, and thus to move the container if he wishes to this cooking zone suitable for heating. the recipient.

Dans un mode de réalisation, chaque foyer de cuisson à induction étant associé à des moyens de détection de la présence d'un récipient, le procédé de commande comprend les étapes suivantes :

  • détection du retrait dudit récipient dudit premier foyer de cuisson ;
  • détection d'un deuxième foyer de cuisson à induction recouvert par ledit récipient ; et
  • émission d'un signal d'avertissement de foyer de cuisson inadapté en association avec ledit deuxième foyer de cuisson lorsque ledit deuxième foyer de cuisson n'est pas déterminé comme disponible et adapté à chauffer ledit récipient à ladite étape d'identification.
In one embodiment, each induction cooking zone being associated with means for detecting the presence of a container, the control method comprises the following steps:
  • detection of the removal of said container from said first cooking zone;
  • detection of a second induction cooking zone covered by said container; and
  • issuing an unsuitable cooking zone warning signal in association with said second cooking zone when said second cooking zone is not determined to be available and suitable to heat said container in said identifying step.

Alternativement, le procédé de commande comprend également les étapes suivantes :

  • détection du retrait dudit récipient dudit premier foyer de cuisson ;
  • détection d'un deuxième foyer de cuisson à induction recouvert par ledit récipient ;
  • mise en fonctionnement dudit deuxième foyer de cuisson à ladite puissance de consigne associée audit premier foyer de cuisson lorsque ledit deuxième foyer de cuisson est déterminé comme disponible et adapté à chauffer ledit récipient à ladite étape d'identification ; et
  • extinction du premier foyer de cuisson.
Alternatively, the ordering process also includes the following steps:
  • detection of the removal of said container from said first cooking zone;
  • detection of a second induction cooking zone covered by said container;
  • operating said second cooking zone at said setpoint power associated with said first cooking zone when said second cooking zone is determined as available and suitable for heating said container in said identification step; and
  • extinction of the first cooking zone.

Dans un mode de réalisation pratique de l'invention, l'étape de mesure d'une valeur représentative d'une puissance délivrée au récipient posé sur le premier foyer de cuisson est mise en œuvre après actionnement d'une touche dédiée de l'appareil de cuisson.In a practical embodiment of the invention, the step of measuring a value representative of a power delivered to the receptacle placed on the first cooking zone is implemented after actuating a dedicated button of the device Cooking.

L'utilisateur peut ainsi lorsqu'il le souhaite vérifier l'adaptation du foyer de cuisson choisi au récipient recouvrant celui-ci.The user can thus, when he so desires, check the adaptation of the cooking zone chosen to the container covering the latter.

Alternativement, l'étape de mesure d'une valeur représentative d'une puissance délivrée au récipient posé sur le premier foyer de cuisson est mise en œuvre automatiquement, après l'étape d'acquisition d'une puissance de consigne associée à ce premier foyer de cuisson.Alternatively, the step of measuring a value representative of a power delivered to the receptacle placed on the first cooking zone is implemented automatically, after the step of acquiring a setpoint power associated with this first zone Cooking.

Le procédé de commande permet ainsi de vérifier l'adaptation du foyer de cuisson choisi et de la puissance de consigne associée à ce foyer de cuisson à chaque acquisition ou modification de la valeur de la puissance de consigne associée au foyer de cuisson.The control method thus makes it possible to check the adaptation of the chosen cooking zone and of the setpoint power associated with this cooking zone on each acquisition or modification of the value of the setpoint power associated with the cooking zone.

Dans un mode de réalisation pratique de l'invention, le signal d'avertissement de foyer de cuisson inadapté est une information affichée sur un bandeau de commande de l'appareil de cuisson, en association avec le foyer de cuisson inadapté.In a practical embodiment of the invention, the unsuitable cooking zone warning signal is information displayed on a control panel of the cooking appliance, in association with the unsuitable cooking zone.

Selon un autre aspect, la présente invention concerne un appareil de cuisson comprenant plusieurs foyers de cuisson à induction et des moyens de commande configurés pour mettre en œuvre le procédé de commande décrit précédemment.According to another aspect, the present invention relates to a cooking appliance comprising several induction cooking zones and control means configured to implement the control method described above.

Cet appareil de cuisson présente des caractéristiques et avantages analogues à ceux décrits précédemment en relation avec le procédé de commande.This cooking appliance has characteristics and advantages similar to those described above in relation to the control method.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will appear further in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :

  • la figure 1 est un schéma illustrant un appareil de cuisson selon un mode de réalisation de l'invention ;
  • la figure 2 est un algorithme illustrant un procédé de commande selon un premier mode de réalisation de l'invention ; et
  • la figure 3 est un algorithme détaillant une étape d'identification d'un foyer disponible et adapté à chauffer un récipient selon un mode de réalisation de l'invention.
In the accompanying drawings, given by way of non-limiting examples:
  • the figure 1 is a diagram illustrating a cooking appliance according to one embodiment of the invention;
  • the picture 2 is an algorithm illustrating a control method according to a first embodiment of the invention; and
  • the picture 3 is an algorithm detailing a step for identifying an available household suitable for heating a container according to one embodiment of the invention.

On va décrire tout d'abord en référence à la figure 1 un exemple d'appareil de cuisson selon un mode de réalisation de l'invention.We will first describe with reference to the figure 1 an example of a cooking appliance according to one embodiment of the invention.

L'appareil de cuisson est typiquement une table de cuisson 10 comprenant plusieurs foyers de cuisson à induction F1, F2, F3.The cooking appliance is typically a hob 10 comprising several induction cooking zones F1, F2, F3.

Dans l'exemple illustré à la figure 1, et de manière nullement limitative, la table de cuisson 10 comporte trois foyers de cuisson à induction F1, F2, F3 répartis dans le plan de cuisson.In the example shown in figure 1 , and in no way limiting, the hob 10 comprises three induction cooking zones F1, F2, F3 distributed in the hob.

Bien entendu, le nombre et la répartition des foyers de cuisson à induction peuvent être différents.Of course, the number and distribution of induction cooking zones can be different.

Chaque foyer de cuisson F1, F2, F3 est par exemple réalisé à partir d'un ou plusieurs bobinages inductifs disposés sous le plan de cuisson.Each cooking zone F1, F2, F3 is for example made from one or more inductive coils arranged under the cooking surface.

L'appareil de cuisson comprend tous les moyens nécessaires à la commande en fonctionnement des foyers de cuisson F1, F2, F3. En particulier, un bandeau de commande 11, par exemple tactile, permet à l'utilisateur de régler la puissance de consigne, et par exemple la durée de fonctionnement, de chaque foyer de cuisson F1, F2, F3 de manière indépendante.The cooking appliance comprises all the means necessary for controlling the cooking zones F1, F2, F3 in operation. In particular, a control panel 11, for example tactile, allows the user to adjust the setpoint power, and for example the operating time, of each cooking zone F1, F2, F3 independently.

Il n'est pas nécessaire de décrire plus en détail ici le fonctionnement de ces foyers de cuisson à induction.It is not necessary to describe in more detail here the operation of these induction cooking zones.

En notera en outre que chaque foyer de cuisson à induction est associé à des moyens de détection d'un récipient disposé au-dessus de chaque foyer de cuisson.It will also be noted that each induction cooking zone is associated with means for detecting a container placed above each cooking zone.

Ces moyens de détection de récipient sont généralement mis en œuvre à partir des inducteurs constituant le foyer de cuisson et permettent, également de manière classique, de détecter la présence ou non d'un récipient R en vis-à-vis du foyer de cuisson considéré.These receptacle detection means are generally implemented from the inductors constituting the cooking hearth and make it possible, also in a conventional manner, to detect the presence or absence of a receptacle R opposite the cooking hearth considered. .

Sur la table de cuisson 10, chaque foyer de cuisson F1, F2, F3 peut être repéré dans le plan de cuisson, par exemple à l'aide d'un contour sérigraphié schématisant globalement la taille du foyer de cuisson F1, F2, F3.On the hob 10, each cooking hearth F1, F2, F3 can be identified in the cooking plan, for example using a screen-printed outline schematizing the overall size of the cooking hearth F1, F2, F3.

Il est classique de prévoir des foyers de cuisson de dimension différente. En particulier, lorsque chaque foyer de cuisson F1, F2, F3 est constitué d'un inducteur enroulé en spirale, la taille du foyer de cuisson correspond sensiblement au diamètre du disque formé par l'inducteur.It is conventional to provide cooking zones of different dimensions. In particular, when each cooking zone F1, F2, F3 consists of an inductor wound in a spiral, the size of the cooking zone corresponds substantially to the diameter of the disk formed by the inductor.

A titre d'exemple non limitatif, à la figure 1, la taille des foyers de cuisson F1, F2, F3 peut varier entre 160 et 210 mm de diamètre.By way of non-limiting example, at the figure 1 , the size of cooking zones F1, F2, F3 can vary between 160 and 210 mm in diameter.

En corollaire, la puissance maximale théorique délivrée par chaque foyer de cuisson F1, F2, F3 varie par exemple entre 2200 et 3100 W.As a corollary, the theoretical maximum power delivered by each cooking zone F1, F2, F3 varies for example between 2200 and 3100 W.

Plus généralement, dans ce mode de réalisation, l'appareil de cuisson comprend plusieurs foyers de cuisson à induction F1, F2, F3 qui délivrent chacun une puissance maximale théorique différente.More generally, in this embodiment, the cooking appliance comprises several induction cooking zones F1, F2, F3 which each deliver a different theoretical maximum power.

Dans la suite de la description, et uniquement à titre illustratif pour décrire le procédé de commande, on considère ci-après qu'un premier foyer de cuisson F1 présente une puissance maximale théorique P1Max supérieure à une puissance maximale théorique P2Max associée à un deuxième foyer de cuisson F2, elle-même supérieure à une puissance maximale théorique P3Max associée à un troisième foyer de cuisson F3.In the remainder of the description, and solely by way of illustration to describe the control method, it is considered below that a first cooking zone F1 has a theoretical maximum power P1Max greater than a theoretical maximum power P2Max associated with a second cooking zone cooking F2, itself greater than a theoretical maximum power P3Max associated with a third cooking hearth F3.

A titre d'exemple, P1Max = 3100 W,

  • P2Max = 2800 W, et
  • P3Max = 2200 W.
By way of example, P1Max = 3100 W,
  • P2Max = 2800W, and
  • P3Max = 2200W.

On va décrire à présent, en référence à la figure 2, un procédé de commande conforme à un mode de réalisation de l'invention qui peut être mis en œuvre dans l'appareil de cuisson tel qu'illustré précédemment à la figure 1.We will now describe, with reference to the picture 2 , a control method in accordance with an embodiment of the invention which can be implemented in the cooking appliance as illustrated above in figure 1 .

L'utilisateur pose par exemple un récipient R sur un premier foyer de cuisson F1 comme illustré dans la situation schématisée à la figure 1.The user places, for example, a container R on a first cooking zone F1 as illustrated in the situation shown schematically in figure 1 .

Le procédé de commande comporte, après la mise en marche du premier foyer de cuisson F1, une première étape d'acquisition S1 d'une puissance de consigne P1c associée au premier foyer de cuisson F1 recouvert du récipient R.The control method comprises, after the start-up of the first cooking zone F1, a first step of acquisition S1 of a setpoint power P1c associated with the first cooking zone F1 covered with the container R.

En pratique, cette étape d'acquisition S1 d'une puissance de consigne peut être mise en œuvre par l'utilisateur à partir du bandeau de commande 11 par des touches de réglage classiques de la puissance de consigne. L'utilisateur peut éventuellement saisir également une durée de cuisson à l'aide du paramétrage d'une minuterie.In practice, this acquisition step S1 of a setpoint power can be implemented by the user from the control panel 11 using conventional setting keys for the setpoint power. The user can optionally also enter a cooking duration using the setting of a timer.

Le procédé de commande se poursuit alors par une étape de mesure S2 d'une valeur représentative d'une puissance P1m délivrée au récipient R posée sur le premier foyer de cuisson F1. Cette étape consiste à mesurer la puissance qui peut être délivrée au récipient R par le premier foyer de cuisson F1 lorsque celui-ci est mis en fonctionnement selon la puissance de consigne P1c fixée par l'utilisateur.The control method then continues with a step S2 of measuring a value representative of a power P1m delivered to the container R placed on the first cooking zone F1. This step consists in measuring the power which can be delivered to the container R by the first cooking zone F1 when the latter is put into operation according to the setpoint power P1c fixed by the user.

En pratique, lors de la mise en fonctionnement du premier foyer de cuisson F1, le ou les inducteurs constituant le foyer de cuisson sont mis en fonctionnement de manière classique par un onduleur commandé en fréquence.In practice, when the first cooking zone F1 is put into operation, the inductor(s) constituting the cooking zone are put into operation in a conventional manner by a frequency-controlled inverter.

Au démarrage, la fréquence de commande de l'onduleur est élevée, par exemple de l'ordre de 50 kHz.At start-up, the inverter control frequency is high, for example of the order of 50 kHz.

Puis cette valeur diminue de façon à augmenter petit à petit la puissance délivrée par le ou les inducteurs constituant le premier foyer de cuisson F1 jusqu'à atteindre sensiblement la valeur de la puissance de consigne P1c.Then this value decreases so as to gradually increase the power delivered by the inductor(s) constituting the first cooking zone F1 until it substantially reaches the value of the setpoint power P1c.

On mesure alors la puissance P1m délivrée au récipient R posé sur le premier foyer de cuisson F1.The power P1m delivered to the container R placed on the first cooking zone F1 is then measured.

La valeur de cette puissance mesurée P1m dépend notamment de l'adaptation du premier foyer de cuisson F1 au récipient R.The value of this measured power P1m depends in particular on the adaptation of the first cooking zone F1 to the container R.

En particulier, la taille relative du récipient R et du premier foyer de cuisson F1 a une influence sur le comportement de l'inducteur placé sous le récipient R. De même, la qualité du matériau utilisé pour réaliser le récipient R vis-à-vis du chauffage par induction, la forme du récipient, la structure du fond du récipient, et éventuellement la présence d'un revêtement, peuvent influencer l'adaptation du récipient R pour son chauffage par induction par le premier foyer de cuisson F1.In particular, the relative size of the container R and the first cooking zone F1 has an influence on the behavior of the inductor placed under the container R. Similarly, the quality of the material used to make the container R vis-à-vis induction heating, the shape of the container, the structure of the bottom of the container, and possibly the presence of a coating, can influence the adaptation of the container R for its induction heating by the first cooking zone F1.

Le procédé de commande comporte ensuite une étape de comparaison S3 de la valeur mesurée P1m avec une valeur représentative de la puissance de consigne P1c.The control method then includes a step S3 of comparing the measured value P1m with a value representative of the setpoint power P1c.

On notera que les valeurs représentatives de la puissance de consigne P1c et de la puissance mesurée P1m sont par exemple des valeurs électriques mesurables par le système de commande, et par exemple une valeur de tension ou de courant mesurée au niveau du circuit formé par l'inducteur et le récipient posé sur le premier foyer de cuisson F1.It will be noted that the values representing the setpoint power P1c and the measured power P1m are for example electrical values measurable by the control system, and for example a voltage or current value measured at the level of the circuit formed by the inductor and the container placed on the first cooking zone F1.

En fonction du résultat de cette étape de comparaison S3, le premier foyer de cuisson F1 est classifié comme adapté à chauffer le récipient R lorsque un ratio entre la valeur mesurée P1m et la valeur représentative de la puissance de consigne P1c est supérieur à un seuil prédéfini.Depending on the result of this comparison step S3, the first cooking zone F1 is classified as suitable for heating the container R when a ratio between the measured value P1m and the value representative of the setpoint power P1c is greater than a predefined threshold .

A titre d'exemple non limitatif, ce ratio peut correspondre à 85%.By way of non-limiting example, this ratio may correspond to 85%.

Dans ce cas, en sortie de l'étape de comparaison S3, le premier foyer de cuisson F1 est considéré comme adapté à chauffer le récipient R et le procédé de commande de l'appareil de cuisson se poursuit de manière classique par l'utilisation en fonctionnement du premier foyer de cuisson F1 pour chauffer le récipient R.In this case, at the output of the comparison step S3, the first cooking zone F1 is considered suitable for heating the receptacle R and the method for controlling the cooking appliance continues in a conventional manner by the use in operation of the first cooking zone F1 to heat the container R.

A contrario, si le ratio entre la valeur mesurée P1m et la valeur représentative de la puissance de consigne P1c est inférieur au seuil prédéfini, le procédé de commande se poursuit par une étape d'identification S4, parmi les autres foyers de cuisson d'induction, d'au moins un foyer de cuisson disponible adapté à chauffer le récipient R.On the other hand, if the ratio between the measured value P1m and the value representative of the setpoint power P1c is lower than the predefined threshold, the control method continues with an identification step S4, among the other induction cooking zones , at least one available cooking zone suitable for heating the container R.

Cette étape d'identification S4 est illustrée, à titre non limitatif, selon un mode de réalisation plus détaillé à la figure 3.This identification step S4 is illustrated, without limitation, according to a more detailed embodiment at picture 3 .

Dans son principe, cette étape d'identification S4 consiste à comparer la valeur mesurée P1m et une valeur représentative de la puissance maximale théorique P2Max, P3Max délivrée par les autres foyers de cuisson F2, F3 de la table de cuisson, différents du premier foyer de cuisson F1.In principle, this identification step S4 consists in comparing the measured value P1m and a value representative of the theoretical maximum power P2Max, P3Max delivered by the other cooking zones F2, F3 of the hob, different from the first cooking zone. cooking F1.

En pratique, afin de discriminer de manière efficace les foyers de cuisson susceptibles de convenir pour chauffer le récipient R en fonction de la puissance de consigne P1c demandé par l'utilisateur, l'étape d'identification S4 comporte tout d'abord une étape de comparaison S41 adaptée à vérifier si le ratio entre la valeur mesurée P1m et la valeur représentative de la puissance de consigne P1c est inférieur à un autre seuil prédéfini, et ici fixé à 70%.In practice, in order to effectively discriminate the cooking zones likely to be suitable for heating the container R according to the setpoint power P1c requested by the user, the identification step S4 first of all comprises a step of comparison S41 adapted to check whether the ratio between the measured value P1m and the value representative of the setpoint power P1c is lower than another predefined threshold, and here fixed at 70%.

Cette étape de vérification S41 permet ainsi de vérifier si la puissance mesurée P1m est très éloignée ou non de la puissance de consigne P1c demandée par l'utilisateur. Dans la négative, on testera ensuite l'adaptation du deuxième foyer de cuisson F2, le plus proche en termes de dimensionnement et de puissance maximale théorique du premier foyer de cuisson F1. A contrario, si l'écart entre la puissance mesurée P1m et la puissance de consigne P1c est très important, on testera directement la possibilité d'utiliser le troisième foyer de cuisson F3 de puissance maximale théorique P3Max la plus faible.This verification step S41 thus makes it possible to verify whether or not the measured power P1m is very far from the setpoint power P1c requested by the user. If not, we will then test the adaptation of the second cooking zone F2, the closest in terms of dimensioning and theoretical maximum power to the first cooking zone F1. Conversely, if the difference between the measured power P1m and the setpoint power P1c is very large, the possibility of using the third cooking zone F3 with the lowest theoretical maximum power P3Max will be directly tested.

Pour vérifier l'adaptation du deuxième ou troisième foyer de cuisson F2, F3 à chauffer le récipient R, des étapes de comparaison S42, S43 sont mises en œuvre respectivement pour comparer la valeur mesurée P1m et une valeur représentative d'une puissance maximale théorique P2Max, P3Max délivrée par chaque foyer de cuisson F2, F3.To check the adaptation of the second or third cooking zone F2, F3 to heat the container R, comparison steps S42, S43 are implemented respectively to compare the measured value P1m and a value representative of a theoretical maximum power P2Max , P3Max delivered by each cooking zone F2, F3.

En pratique, les foyers de cuisson F2, F3 sont classifiés comme un foyer de cuisson adapté lorsque le ratio entre la valeur mesurée P1m et la valeur représentative de la puissance maximale théorique P2Max, P3Max est inférieur à un second seuil prédéfini, ici fixé à titre d'exemple non limitatif à 95%.In practice, cooking zones F2, F3 are classified as a suitable cooking zone when the ratio between the measured value P1m and the value representative of the theoretical maximum power P2Max, P3Max is lower than a second predefined threshold, here fixed as non-limiting example to 95%.

Dans l'affirmative, une étape de détection S44, S45 de récipient est mise en œuvre sur ces foyers de cuisson F2, F3 afin de déterminer si les deuxième et troisième foyers de cuisson F2, F3 sont des foyers de cuisson disponibles.If so, a container detection step S44, S45 is implemented on these cooking zones F2, F3 in order to determine whether the second and third cooking zones F2, F3 are available cooking zones.

En sortie de ces étapes de détection S44, S45, une étape de classification S46, S47 permet de classifier le deuxième foyer de cuisson F2 ou le troisième foyer de cuisson F3, lorsqu'il est disponible, comme un foyer de cuisson adapté à chauffer le récipient R dès lors que le ratio entre la valeur mesurée P1m et la valeur représentative de la puissance maximale théorique P2Max, P3Max associée à chaque foyer de cuisson F2, F3 est inférieur au second seuil prédéfini.At the output of these detection steps S44, S45, a classification step S46, S47 makes it possible to classify the second cooking zone F2 or the third cooking zone F3, when it is available, as a cooking zone suitable for heating the container R when the ratio between the measured value P1m and the value representative of the theoretical maximum power P2Max, P3Max associated with each cooking zone F2, F3 is lower than the second predefined threshold.

En revenant au procédé de commande illustré à la figure 2, en sortie de l'étape d'identification S4, lorsqu'il existe au moins un foyer de cuisson à induction disponible adapté à chauffer le récipient R comme décrit précédemment, une étape d'émission S5 d'un signal d'avertissement de foyer de cuisson inadapté est mise en œuvre. Le signal d'avertissement de foyer de cuisson inadapté est émis en association avec le premier foyer de cuisson F1.Returning to the ordering process illustrated in picture 2 , at the output of the identification step S4, when there is at least one induction cooking zone available suitable for heating the container R as described previously, a step S5 of transmitting a zone warning signal unsuitable cooking method is implemented. The unsuitable cooking zone warning signal is emitted in association with the first cooking zone F1.

Ainsi, l'utilisateur peut être informé de l'inadaptation du premier foyer de cuisson F1 au chauffage du récipient R, et ceci uniquement s'il existe dans la table de cuisson 10 un autre foyer de cuisson à induction, susceptible de chauffer le récipient R dans des conditions d'adaptation supérieures.Thus, the user can be informed of the unsuitability of the first cooking zone F1 for heating the container R, and this only if there is in the hob 10 another induction cooking zone, capable of heating the container. R under higher adaptation conditions.

L'étape d'émission S5 du signal d'avertissement peut être mise en œuvre de manière visuelle à l'attention de l'utilisateur.The step S5 of issuing the warning signal can be implemented visually for the attention of the user.

Dans ce cas, le signal d'avertissement de foyer de cuisson inadapté est une information affichée sur le bandeau de commande 11 de la table de cuisson 10, en association avec le foyer de cuisson inadapté.In this case, the unsuitable hob warning signal is information displayed on the control panel 11 of the hob 10, in association with the unsuitable hob.

Comme illustré à la figure 1, par exemple un signal « no » est affiché dans une zone d'affichage dédiée à l'affichage de la puissance de consigne, associée à chaque foyer de cuisson F1, F2, F3.As shown in figure 1 , for example a “no” signal is displayed in a display zone dedicated to displaying the setpoint power, associated with each cooking zone F1, F2, F3.

Ici, un signal "no" est affiché dans la zone d'affichage de puissance de consigne dédiée au premier foyer de cuisson F1.Here, a "no" signal is displayed in the setpoint power display zone dedicated to the first cooking zone F1.

Dans ce mode de réalisation illustré à la figure 2, le procédé de commande se poursuit, suite à l'émission d'un tel signal d'avertissement de foyer de cuisson inadapté, en suivant le déplacement éventuel du récipient R par l'utilisateur sur la table de cuisson 10.In this embodiment illustrated in picture 2 , the control method continues, following the emission of such an unsuitable cooking zone warning signal, following the possible movement of the container R by the user on the hob 10.

Une étape de détection S6 du retrait du récipient R du premier foyer de cuisson F1 est mise en œuvre pendant une période de temps prédéterminée ΔT1, égale par exemple à 10s.A detection step S6 of the withdrawal of the container R from the first cooking zone F1 is implemented for a predetermined period of time ΔT1, equal for example to 10s.

Comme illustré à la figure 2, si le récipient R n'est pas retiré du premier foyer de cuisson F1, le procédé de commande réitère les étapes d'identification S4 d'un foyer de cuisson disponible adapté à chauffer le récipient R et l'étape d'émission S5 d'un signal d'avertissement de foyer de cuisson inadapté pendant la période de temps prédéterminée ΔT1. A l'issue de cette période de temps prédéterminée ΔT1, le procédé de commande se poursuit par l'utilisation du premier foyer de cuisson F1 pour chauffer le récipient R de manière classique, à la puissance de consigne P1c demandée par l'utilisateur.As shown in figure 2 , if the container R is not removed from the first cooking zone F1, the control method repeats the identification steps S4 of an available cooking zone suitable for heating the container R and the emission step S5 d an unsuitable cooking zone warning signal for the predetermined period of time ΔT1. At the end of this predetermined period of time ΔT1, the control method continues with the use of the first cooking zone F1 to heat the container R in the conventional manner, at the setpoint power P1c requested by the user.

En revanche, si à l'issue de l'étape de détection S6, le récipient R est retiré du premier foyer de cuisson F1, une étape d'activation S7 de la détection de récipient est mise en œuvre sur la table de cuisson 10.On the other hand, if at the end of the detection step S6, the container R is removed from the first cooking zone F1, a step S7 for activating container detection is implemented on the hob 10.

L'étape d'activation S7 de la détection de récipient est mise en œuvre de manière classique dans une table de cuisson, en testant le comportement de chaque inducteur constituant chaque foyer de cuisson F1, F2, F3 de la table de cuisson 10 pour vérifier s'il est ou non recouvert d'un récipient R.The container detection activation step S7 is implemented in a conventional manner in a hob, by testing the behavior of each inductor constituting each cooking zone F1, F2, F3 of the hob 10 to verify whether or not it is covered with a container R.

Une étape de détection S8 est mise en œuvre pour détecter la présence du récipient R sur un autre foyer de cuisson à induction Fi, différent du premier foyer de cuisson F1.A detection step S8 is implemented to detect the presence of the container R on another induction cooking zone Fi, different from the first cooking zone F1.

L'étape de détection S8 est mise en œuvre également de manière itérative pendant une période de temps prédéterminée ΔT2, égale par exemple à 10s.The detection step S8 is also implemented iteratively for a predetermined period of time ΔT2, equal for example to 10s.

Si à l'issue de la période de temps prédéterminée ΔT2, aucun récipient n'est détecté sur un foyer de cuisson Fi de la table de cuisson 10, une étape d'extinction S9 du premier foyer de cuisson F1 est mise en œuvre.If at the end of the predetermined period of time ΔT2, no container is detected on a cooking zone Fi of the hob 10, a step S9 of extinguishing the first cooking zone F1 is implemented.

En revanche, si à l'issue de l'étape de détection S8, un foyer de cuisson à induction Fi est détecté comme recouvert par le récipient R, une étape de test S10 permet de vérifier si ce foyer de cuisson Fi correspond à un foyer disponible classifié comme un foyer de cuisson adapté au chauffage du récipient R lors de l'étape d'identification S4 d'un foyer de cuisson disponible adapté à chauffer le récipient R.On the other hand, if at the end of the detection step S8, an induction cooking zone Fi is detected as covered by the container R, a test step S10 makes it possible to check whether this cooking zone Fi corresponds to a zone available classified as a cooking zone suitable for heating the container R during the identification step S4 of an available cooking zone suitable for heating the container R.

Dans la négative, l'étape d'émission S5 d'un signal d'avertissement de foyer de cuisson inadapté est mise en œuvre en association avec cet autre foyer de cuisson Fi pour indiquer à l'utilisateur que cet autre foyer de cuisson n'est pas identifié comme un foyer disponible adapté à chauffer le récipient R.If not, the step S5 of issuing an unsuitable cooking zone warning signal is implemented in association with this other cooking zone Fi to indicate to the user that this other cooking zone is not is not identified as an available fireplace suitable for heating the container R.

L'ensemble des étapes S5 et suivantes est alors réitéré pour détecter le déplacement éventuel du récipient R.All of the steps S5 and following are then repeated to detect any movement of the container R.

A contrario, si à l'issue de l'étape de test S10, le foyer de cuisson Fi recouvert par le récipient R correspond à un foyer disponible adapté à chauffer le récipient lors de l'étape d'identification S4, le foyer de cuisson Fi est mis en fonctionnement à la puissance de consigne P1c associée au premier foyer de cuisson F1 et une étape d'extinction S11 du premier foyer de cuisson F1 est mise en œuvre.Conversely, if at the end of the test step S10, the cooking hearth Fi covered by the container R corresponds to an available hearth suitable for heating the container during the identification step S4, the cooking hearth Fi is set operation at the setpoint power P1c associated with the first cooking zone F1 and a step S11 of extinguishing the first cooking zone F1 is implemented.

L'ensemble des paramètres de cuisson réglés par l'utilisateur, et notamment la puissance de consigne P1c et éventuellement la durée de cuisson sont transmis à ce nouveau foyer de cuisson Fi pour permettre ensuite l'utilisation classique de ce foyer de cuisson Fi pour chauffer le récipient R.All of the cooking parameters set by the user, and in particular the setpoint power P1c and possibly the cooking duration are transmitted to this new cooking zone Fi to then allow the conventional use of this cooking zone Fi to heat the container R.

Dans le mode de réalisation illustré à la figure 2, l'étape de mesure S2 d'une valeur représentative d'une puissance délivrée au récipient R posé sur le premier foyer de cuisson F1 est mise en œuvre automatiquement après l'étape d'acquisition S1 de la puissance de consigne P1c associée au premier foyer de cuisson F1.In the embodiment illustrated in picture 2 , the step S2 of measuring a value representative of a power delivered to the container R placed on the first cooking zone F1 is implemented automatically after the step S1 of acquiring the setpoint power P1c associated with the first cooking zone F1.

Alternativement, l'étape de mesure S2 et l'ensemble des étapes suivantes du procédé de commande pourraient être mis en œuvre après actionnement d'une touche dédiée 12 de l'appareil de cuisson 10. Le procédé de commande comporte alors une étape préalable pour détecter l'actionnement de cette touche dédiée 12 de l'appareil de cuisson 10. En l'absence d'actionnement de la touche dédiée 12, le procédé de commande et de chauffage du récipient R se poursuit de manière classique sur le premier foyer de cuisson F1 quelle que soit la qualité de l'adaptation.Alternatively, the measurement step S2 and all of the following steps of the control method could be implemented after actuating a dedicated key 12 of the cooking appliance 10. The control method then comprises a preliminary step for detect the actuation of this dedicated button 12 of the cooking appliance 10. In the absence of actuation of the dedicated button 12, the process for controlling and heating the container R continues in a conventional manner on the first hearth of F1 cooking regardless of the quality of the adaptation.

En revanche, l'utilisateur peut à tout moment actionner la touche dédiée 12 pour vérifier l'adaptation du premier foyer de cuisson F1 au chauffage du récipient R selon la puissance de consigne demandée.On the other hand, the user can at any time actuate the dedicated key 12 to check the adaptation of the first cooking zone F1 to the heating of the container R according to the requested setpoint power.

Ainsi, le procédé de commande permet de déterminer si un premier foyer de cuisson F1 est bien adapté au chauffage d'un récipient R et dans le cas contraire, d'émettre un signal d'avertissement de foyer de cuisson inadapté à l'attention de l'utilisateur afin que celui-ci puisse choisir un foyer de cuisson mieux adapté.Thus, the control method makes it possible to determine whether a first cooking zone F1 is well suited to heating a container R and, if not, to emit an unsuitable cooking zone warning signal for the attention of the user so that he can choose a more suitable cooking zone.

Bien entendu, les modes de réalisation décrits précédemment sont purement illustratifs.Of course, the embodiments described above are purely illustrative.

Ainsi, les valeurs choisies pour illustrer les ratios permettant de déterminer si un foyer de cuisson est adapté ou non sont indicatives et peuvent varier, notamment en fonction de la taille et de la puissance de chaque foyer de cuisson.Thus, the values chosen to illustrate the ratios used to determine whether a cooking zone is suitable or not are indicative and may vary, in particular depending on the size and power of each cooking zone.

Par ailleurs, le procédé décrit précédemment en référence à la figure 2 peut également être modifié après les étapes d'identification S4 et d'émission S5 d'un signal d'avertissement de foyer de cuisson inadapté en association avec le premier foyer de cuisson F1.Furthermore, the method described above with reference to the picture 2 can also be modified after the steps of identification S4 and emission S5 of an unsuitable cooking zone warning signal in association with the first cooking zone F1.

Le procédé de commande peut comporter en outre une étape d'émission d'un signal d'avertissement de foyer de cuisson adapté en association avec un des foyers de cuisson F2, F3 disponible et identifié comme adapté à chauffer le récipient R après l'étape d'identification S4 telle que mise en œuvre par exemple selon le mode de réalisation de la figure 3.The control method may further comprise a step of transmitting a suitable cooking zone warning signal in association with one of the cooking zones F2, F3 available and identified as suitable for heating the container R after the step S4 identification as implemented for example according to the embodiment of the picture 3 .

Dans ce cas, le signal d'avertissement de foyer de cuisson adapté peut être une information affichée sur le bandeau de commande 11 de l'appareil de cuisson 10, en association avec le foyer de cuisson adapté.In this case, the adapted cooking zone warning signal can be information displayed on the control panel 11 of the cooking appliance 10, in association with the adapted cooking zone.

Ainsi, simultanément à l'affichage du signal "no" en association avec le premier foyer de cuisson F1, un signal différent, tel que "ok", peut être affiché sur une autre zone d'affichage associée à l'un des deux autres foyers de cuisson F2, F3.Thus, simultaneously with the display of the "no" signal in association with the first cooking zone F1, a different signal, such as "ok", can be displayed on another display zone associated with one of the other two cooking zones F2, F3.

Claims (11)

  1. Method of controlling a cooking appliance (10) comprising several induction cooking areas (F1, F2, F3), characterized in that it comprises the following steps:
    - acquiring (S1) a power setting (P1c) associated with a first cooking area (F1) covered with a vessel (R);
    - measuring (S2) a value representing a power (P1m) delivered to said vessel (R) placed on said first cooking area (F1); and
    - comparing (S3) said measured value (P1m) and a value representing said power setting (P1c), said first cooking area (F1) being considered as suitable for the heating of said vessel (R) when a ratio between said measured value (P1m) and said value representing the power setting (P1c) is greater than a predefined threshold,
    and in that said controlling method further comprises, when said ratio between said measured value (P1m) and said value representing the power setting (P1c) is less than said predefined threshold, a step of identifying (S4), among said several induction cooking areas (F1, F2, F3), at least one available cooking area, different from said first cooking area (F1) and suitable for heating said vessel (R), said identifying step (S4) comprising the following sub-steps:
    • comparing (S42, S43) said measured value (P1m) and a value representing a maximum theoretical value (P2Max, P3Max) delivered by said at least one available cooking area (F2, F3); and
    • classifying said at least one available cooking area (F2, F3) as a suitable cooking area when the ratio between said measured value (P1m) and said value representing the theoretical maximum power (P2Max, P3Max) is less than a second predefined threshold.
  2. Controlling method according to claim 1, characterized in that it further comprises the following steps:
    - sending (S5) an unsuitable cooking area alerting signal in association with said first cooking area (F1) when said ratio between said measured value (P1m) and said value representing the power setting (P1c) is less than said predefined threshold.
  3. Controlling method according to one of claims 1 or 2, characterized in that it further comprises, when the ratio between said measured value (P1m) and said value representing the power setting (P1c) is less than said predefined threshold, a step (S5) of sending an unsuitable cooking area alerting signal in association with said first cooking area (F1) if at least one cooking area, different from said first cooking area (F1), is determined as being available and suitable for heating said vessel (R) at said identifying step (S4).
  4. Controlling method according to one of claims 1 to 3, characterized in that it further comprises a step of sending a suitable cooking area alerting signal in association with said at least one available cooking area that is suitable for heating said vessel (R).
  5. Controlling method according to one of claims 1 to 4, each induction cooking area (F1, F2, F3) being associated with means for detecting the presence of a vessel (R), characterized in that it comprises the following steps:
    - detecting (S6) the removal of said vessel (R) from said first cooking area (F1);
    - detecting (S8) a second induction cooking area (Fi) covered by said vessel (R); and
    - sending (S5) an unsuitable cooking area alerting signal in association with said second cooking area (Fi) when said second cooking area (Fi) is not determined as available and suitable for heating said vessel (R) at said identifying step (S4).
  6. Controlling method according to one of claims 1 to 4, each induction cooking area (F1, F2, F3) being associated with means for detecting the presence of a vessel (R), characterized in that it comprises the following steps:
    - detecting (S6) the removal of said vessel (R) from said first cooking area (F1);
    - detecting (S8) a second induction cooking area (Fi) covered by said vessel (R); and
    - putting said second cooking area (Fi) into operation at said power setting (P1c) associated with said first cooking area (F1) when said second cooking area (Fi) is determined as available and suitable for heating said vessel (R) at said identifying step (S4); and
    - turning off (S11) said first cooking area (F1).
  7. Controlling method according to one of claims 1 to 6, characterized in that said step of measuring (S2) a value representing a power (P1m) delivered to said vessel (R) placed on said first cooking area (F1) is implemented after actuating a dedicated manual control (12) of the cooking appliance (10)
  8. Controlling method according to one of claims 1 to 6, characterized in that said step of measuring (S2) a value representing a power (P1m) delivered to said vessel (R) placed on said first cooking area (F1) is implemented automatically, after said step (S1) of acquiring a power setting (P1c) associated with said first cooking area (F1).
  9. Controlling method according to one of claims 1 to 8, characterized in that said unsuitable cooking area alerting signal is an item of information displayed on a control panel (11) of the cooking appliance (10), in association with said unsuitable cooking area.
  10. Cooking appliance comprising several induction cooking areas (F1, F2, F3), characterized in that it comprises control means configured to implement the controlling method in accordance with one of claims 1 to 9.
  11. Cooking appliance according to claim 10, characterized in that said several induction cooking areas (F1, F2, F3) deliver a different theoretical maximum power (P1Max, P2Max, P3Max).
EP16157136.9A 2015-03-02 2016-02-24 Method for controlling a cooking appliance and associated cooking appliance Active EP3065505B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2389045B1 (en) * 2010-05-21 2013-07-17 FagorBrandt SAS Method for controlling the operation of a set of inductors of an induction cooktop
EP2706816B1 (en) * 2012-09-05 2016-07-20 E.G.O. ELEKTRO-GERÄTEBAU GmbH Operating method for a cooking hob and cooking hob
EP2453715B9 (en) * 2010-11-11 2017-01-25 BSH Hausgeräte GmbH Household operating device and method for centring an attachment to a household operating device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686340A (en) * 1985-04-17 1987-08-11 Sanyo Electric Co., Ltd. Induction heating apparatus with unsuitable load detecting circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2389045B1 (en) * 2010-05-21 2013-07-17 FagorBrandt SAS Method for controlling the operation of a set of inductors of an induction cooktop
EP2453715B9 (en) * 2010-11-11 2017-01-25 BSH Hausgeräte GmbH Household operating device and method for centring an attachment to a household operating device
EP2706816B1 (en) * 2012-09-05 2016-07-20 E.G.O. ELEKTRO-GERÄTEBAU GmbH Operating method for a cooking hob and cooking hob

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FR3033471B1 (en) 2017-03-17
EP3065505A1 (en) 2016-09-07
MA40356A (en) 2016-09-07
FR3033471A1 (en) 2016-09-09

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