EP2265087A2 - Cooking surface with several independent cooking elements - Google Patents

Abstract

A hob comprises a plurality of independent cooking hobs (F i) associated respectively with control means (C i) of a heating power of the cooking appliance and detection means (D i) of a cooking container to the right of cooking stoves. The heating power associated with a cooking zone (F i) is equal to a predefined value and the control means (C i) are adapted to control in operation a cooking zone (F i) according to the heating power when a cooking vessel is detected at the right of the cooking zone (F i).

Description

The present invention relates to a hob comprising a plurality of independent cooking hobs.

It relates generally to the hobs comprising radiant heating elements or induction, suitable for heating a cooking vessel and its contents.

Cooking tables are known for which cooking zones are predefined in the hob. Each home is thus a cooking zone for heating a container.

Traditionally, for this type of hob, the heating power can be adjusted by the user according to the desired recipe, in a predetermined power range.

Also known are hobs in which several heating elements are arranged in the hob, means for detecting a container being adapted to detect the presence of a cooking vessel disposed above a set of heaters. heating elements. This set of heating elements thus constitutes a cooking zone for which the user can, as previously, set a selected heating power in a predetermined power range.

When the user wishes to change the heating power associated with a container, it must adjust, at a control panel, the heating power associated with the cooking zone on which is placed the container in question.

It is also known in the document DE 40 07 680 a hob in which a predefined heating power is assigned to a portion of a hob.

The present invention aims to facilitate the adjustment of the heating power associated with a container, and in particular to allow a intuitive adjustment by simple manipulation of the cooking vessel and modification of its positioning on a cooking surface.

To this end, the present invention is directed to a hob comprising a plurality of independent cooking hobs associated respectively with means for controlling a cooking stove's heating power and means for detecting a cooking vessel at the hearth of the fireplaces. Cooking.

According to the invention, the heating power associated with a cooking stove is equal to a predefined value and the control means are adapted to control in operation a cooking stove according to this heating power, when a cooking vessel is detected to the right of this cooking hearth.

Thus, the user no longer has to adjust the heating power associated with a cooking stove. As soon as a cooking vessel is positioned in the vicinity of a cooking hearth, the control means make it possible to heat this receptacle to a predefined value of heating power.

Preferably, the predefined heating power values respectively associated with the cooking hobs are different from each other.

Thus, the user can change the heating power delivered to a container by moving it on the hob from one cooking stove to another.

It is thus possible to position the cooking vessel judiciously on one of the hobs of the hob to allow its heating according to a predefined heating power.

According to an advantageous characteristic of the invention, the predefined values of the heating powers associated respectively with the cooking stoves are increasing following a sequence of cooking stoves arranged from one edge to the other of the hob.

There are thus independent cooking hobs allowing, by a displacement of the container on the cooking stoves, to increase the heating power or on the contrary to reduce it depending on the direction of movement of the container on the hob.

According to another characteristic of the invention, the hob comprises means for adjusting the predefined values of the heating powers associated with the cooking hobs.

The user can thus pre-set the preset values of the heating power, depending on the subsequent use of the hob.

The present invention is particularly advantageous when the cooking hobs consist of one or more induction heaters.

Other features and advantages of the invention will become apparent in the description below.

• la figure 1 est une vue de dessus d'une table de cuisson selon un mode de réalisation de la présente invention ;
• la figure 2 est une illustration schématique du système de commande de la table de cuisson illustrée à la figure 1 ;
• la figure 3 est une vue de dessus d'une table de cuisson conforme à un mode de réalisation utile à la compréhension de la présente invention ;
• la figure 4 est une vue schématique explicitant le fonctionnement de la table de cuisson illustrée à la figure 3 ; et
• la figure 5 est un schéma illustrant un calcul de puissance intermédiaire, dans le mode de fonctionnement de la figure 4.

In the accompanying drawings, given as non-limiting examples:

• the figure 1 is a top view of a hob according to an embodiment of the present invention;
• the figure 2 is a schematic illustration of the cooktop control system shown in figure 1 ;
• the figure 3 is a top view of a hob according to an embodiment useful for understanding the present invention;
• the figure 4 is a schematic view explaining the operation of the hob illustrated in FIG. figure 3 ; and
• the figure 5 is a diagram illustrating an intermediate power calculation, in the operating mode of the figure 4 .

We will first describe with reference to the figure 1 , a hob according to one embodiment of the invention.

We illustrated on the figure 1 a schematic top view of a hob. Circles schematize the existence of cooking zones constituted here by independent cooking stoves on which a cooking vessel can be placed.

Such a hob can be embedded or be an integral part of a work plan. It can also be associated with other cooking devices, such as an oven arranged at the bottom.

Moreover, in addition to the cooking hobs that will be described below and their particular operation, the hob may include adjacent other cooking hobs of the same type or different type.

Here, by way of non-limiting examples, each cooking stove consists of one or more induction heating elements. Thus, a single disk-shaped inductor can materialize each cooking zone. Alternatively, each cooking zone may comprise several concentric inductors and, for example, three concentric inductors to adapt the size of the cooking zone to the size of the container to be heated. This type of concentric inductor is well known and described in particular in the document FR 2,728,132 .

As non-limiting examples, we have illustrated on the figure 1 four cooking zones F ₁ , F ₂ , F ₃ and F ₄ , successively arranged with an edge 11 at an edge 12 of the hob 10.

The hob 10 has a front edge 13 corresponding to the front face of the hob 10 at which is positioned traditionally the user of the table.

Thus, the different cooking zones F ₁ to F ₄ are successively arranged from a left lateral edge 11 to a right lateral edge 12 of the hob.

Of course, the number of cooking zones, here equal to 4, is not limiting. In addition, the arrangement of the cooking zones could be different. Thus, a cooking zone could be arranged in the center of the table, different cooking zones being arranged around this central cooking zone, at the periphery of the hob.

A control panel 14 is generally provided near the front edge 13 of the hob to allow the user to control the operation and change various parameters associated with the hob.

This control panel 14 may comprise different sensory keys whose functions will be described later.

We schematically illustrated at the figure 2 the control means during operation of the cooking zones F _1, F _2, F ₃ and F _4.

In particular, each cooking zone F _i is associated with a control means C _i of the heating power of this cooking zone F _i .

Traditionally, these control means make it possible to operate each fireplace F _i independently, with a heating power determined by the user by means of a sensitive control provided at the control panel 14.

It is thus possible to adjust the power control of each fireplace individually.

Detection means D _i are also associated with each cooking zone F _i so as to detect the presence or absence of a cooking vessel disposed in line with each cooking zone F _i .

These detection means are generally constituted by inductors, and here by the inductors used to heat the container.

For example, the measurement of the effective current flowing in each inductor is dependent on the surface of this inductor covered by a container.

The control of the value of the effective current thus makes it possible to determine the presence or not of a container placed on the cooking zone concerned.

In a traditional hob, these detection means D ₁ , D ₂ , D ₃ and D ₄ make it possible in particular to automatically cut off the supply of the heating means associated with each cooking zone F ₁ , F ₂ , F ₃ and F ₄ when the container has been removed from the cooking zone.

In parallel with this traditional system for managing cooking hobs, the hob according to the invention comprises centralized control means C which make it possible to control the operation of the cooking means. control C _i according to the information given by each detection means D _i .

In particular, thanks to these control means C, the control means C _i are adapted to control in operation each cooking zone F _i when a cooking vessel is detected in line with the cooking zone F _i .

The heating power then associated with each cooking zone F _i is equal to a preset value P _i memorized for each cooking zone F _i in the control means C.

Preferably, these predefined values of the heating powers P _i respectively associated with each cooking zone F _i are different from each other and cover the power range available on the hob.

As non-limiting examples, the heating powers P _i may be between 100 and 3000 W.

• P₁ = 3000 W pour F₁ ;
• P₂ = 1500 W pour F₂ ;
• P₃ = 500 W pour F₃ ; et
• P₄ = 100 W pour F₄.

With reference to the figure 1 , the predefined value of the heating power associated with each cooking zone may be equal to:

• P ₁ = F ₁ to 3000 W;
• P ₂ = 1500 W for F ₂ ;
• P ₃ = 500 W for F ₃ ; and
• P ₄ = 100 W for F ₄ .

So, as well illustrated at the figure 1 , the predefined values of the heating power associated with each cooking zone are increasing following a series of cooking zones arranged between the two edges of the hob.

In practice, it may be preferable to arrange the cooking zones F ₁ to F ₄ such that the predefined value of the heating powers associated with these cooking zones increases from a right lateral edge 12 to a left lateral edge 11 from the hob.

In the example described above, the preset values of the heating powers P _i are memorized by default in the control means C.

Optionally, the hob may include adjustment means accessible by the user to adjust these preset values of the heating power associated with each cooking zone F _i .

These adjustment means may consist of sensitive keys available at the control panel 14 of the hob 10.

Thus, the user can customize the preset values of the heating powers P _i associated with each household F _i , the subsequent operation of the hob being automatically managed by the control means C so that as soon as a container is detected with respect to a cooking zone F _i , the associated power control means C _i control the operation of the cooking zone F _i to the heating power with a predetermined value P _i .

This hob thus allows the user to adjust the heating power associated with a container by simply moving this container on the hob and its arrangement facing different homes.

So, in the example shown in the figure 1 and with the predefined values of the powers P _i given as an example above, the user will be able to start cooking where it is necessary to enter food, on the leftmost firebox F ₁ controlled with a heating power equal to 3000 W. Then, the container can be moved to the fires F ₂ , F ₃ or F ₄ so as to choose a cooking zone, associated with a lower heating power, for simmering the contents of the container.

In practice, when the user wishes to start a cooking, he places a container on the firebox F _i corresponding to the type of cooking he wishes to perform, then activates a cooking command, for example by pressing a touch sensitive available at from the control panel 14.

The activation of this cooking control key has the effect of controlling the operation of the central control means C. The information given to the control means C by the detection means D ₁ , D ₂ , D ₃ and D ₄ allows determine the focus F ₁ , F ₂ , F ₃ and F ₄ on which is placed the container of cooking. In response, the power control means C ₁ , C ₂ , C ₃ and C ₄ associated with the focus thus identified are implemented to deliver the heating power to the preset value for this focus.

Then, the central control means C continuously monitor the presence of the container on the hearth, so that when the container is moved from one focus to another, the central control system C receives the displacement information of the container. . In this case, the central control system again identifies from the detection means D _i the hearth on which the container was placed. Once the hearth thus detected, the control means associated with this new focus are implemented to control in operation this cooking stove according to the preset value heating power stored in the central control means C.

Note that when using more than one container on the cooktop, the user must activate the cook control at the control panel 14 for each new container added to the table.

The arrangement of the cooking heaters F _i could be different, and for example the higher power fireplace F _i could be located substantially in the center of the hob, the lower power fires F ₂ , F ₃ and F ₄ being arranged around of this central hearth F ₁ , at the periphery of the hob 10.

We will now describe with reference to the figure 3 , a hob according to another embodiment, not covered by the claims but useful for understanding the invention.

The hob is thus shown schematically from above.

As before, this hob can be embedded or be an integral part of a worktop and possibly be associated with other cooking devices, such as an oven or other cooking stoves arranged in the same plane.

In this embodiment, the hob comprises a plurality of heating elements arranged in the hob, and for example several small induction heating elements arranged in the cooking hob.

The heating elements 21 are thus distributed along a two-dimensional grid in the cooking plane of the table 20.

This hob thus has a large cooking zone, up to the size of the hob and for heating one or more containers without predetermined location of the cooking chamber. The user has full latitude to position the cooking vessel at any point on the hob.

Each heating element 21 consists of a small winding or elementary inductor. Preferably, these heating elements 21 are of circular shape and staggered in the cooking plane, so as to cover the entire surface of the hob.

The size of the inductors 21 is small enough that any container size covers at least one elementary inductor.

By way of example, the diameter of each elementary inductor 21 may be equal to 70 or 80 mm.

Each inductor is independently powered and has independent heating power control means. As an example, the maximum power supplied by each inductor is of the order of 700 W. It is thus possible to obtain a total power of approximately 2800 W for a medium-sized container, approximately 18 cm in diameter. , which would recover four inductors 21.

The traditional control system of such a hob can manage one or more containers placed on the hob and apply different powers, depending on the desired power demanded by the user, for each container.

For this purpose the hob 20 comprises a control and display keyboard 22. Each heating element 21 is associated with means for detecting the presence of a container placed on the cooking surface in line with this heating element 21.

In the particular example described here, the elementary inductors 21 constitute both the heating means of the container and means for detecting the presence of a container. The detection means are adapted detecting a cooking vessel disposed in line with a subset of heating elements constituting a cooking zone.

As previously, the measurement of the effective current passing through each inductor is dependent on the surface of this inductor covered by a container.

The control of this effective current thus makes it possible to determine the recovery rate of this inductor by a container placed on the hob.

By measuring the effective current, the position of the container on the cooking surface can be determined and a cooking zone consisting of one or more adjacent inductors can thus be defined.

Various improved detection methods are described in particular in the French patent application no. 0313925 in the name of the Claimant.

In this embodiment of the invention, the hob 20 comprises, as previously, centralized control means which make it possible to control the operation of the power control means of each inductor so that the heating power associated with a zone detected cooking is equal to a predefined value.

In practice, the predefined value of the heating power associated with each cooking zone may depend, for example, on the relative position of this cooking zone with respect to two edges of the hob.

By way of non-limiting example, the heating power of predefined value may depend on the position of the container relative to the distance between the left side edges 23 and right 24 of the hob.

In practice, when a container is placed on the hob 20, the user indicates by means of a control key provided at the control panel 22 the addition of a container on the hob 20 .

The centralized control means are then adapted to analyze the responses provided by the means for detecting the presence of a container.

In practice, the value of the rms current measured at each inductor 21 allows the centralized control means to determine the inductor (s) covered at least partially by a container. This set of elementary inductors 21 thus constitutes a cooking zone.

In practice, it will be noted that an elementary inductor 21 belongs to a cooking zone when its recovery rate is greater than a threshold value, for example 10%.

The centralized control means are further adapted to determine the heating power to be associated with this cooking zone Z.

By way of example, when the detected cooking zone Z is adjacent to the left lateral edge 23 of the hob, the associated heating power corresponds to a maximum heating power. Thus, for a medium-sized container covering about four inductors, the predefined value of the heating power will be of the order of 2800-3000 W.

On the other hand, when the detected cooking zone Z is adjacent to the right lateral edge 24 of the hob 20, the predefined value of the heating power associated with this cooking zone Z may be equal to the minimum value of the cooking table Z. cooking, of the order of 100 W.

Any intermediate position of the detected heating zone Z gives rise to a calculation of a predefined value of heating power depending on the relative position of the container with respect to these two lateral edges 23, 24.

By way of example, when the detected cooking zone Z is disposed halfway between these edges 23, 24, the predefined value of the heating power associated with this cooking zone Z is equal to 50% of the maximum value. the power delivered by the covered inductors.

Thus, according to the positioning of the cooking vessel between two edges 23, 24 of the hob 20, a predefined heating power will be associated with this container. This embodiment makes it possible to cover the range of heating power available between a minimum power and a maximum power, simply by moving the cooking vessel.

Of course, the relative position of the cooking zone could also be determined relative to the center and an edge of the hob.

Thus, in such an embodiment, when the detected cooking zone Z is located in the center of the hob, the heating power has a maximum predefined value. By moving the container away from the center of the hob in the direction of the edges, the newly detected cooking zones Z are associated with a heating power with a lower preset value.

Thus, when using this hob, the user can change the heating power delivered to the container by simply moving the container on the hob.

As soon as the cooking vessel is moved, the centralized control means detect, by means of the value of the rms current measured at each elementary inductor 21, the displacement of this vessel and the new cooking zone Z displaced.

Depending on the positioning of this cooking zone Z, the heating power is changed to be equal to the preset value, stored or calculated by the centralized control means.

In practice, when a heating power of a predefined value P is associated with a cooking zone Z consisting of several inductors, the power is distributed over each of these inductors as a function of their recovery rate.

This distribution makes it possible to minimize the field radiated by the partially covered inductors as long as the current traversing these inductors little covered is reduced.

où P est égal à la valeur prédéfinie de la puissance de chauffe associée à cette zone de cuisson Z, T_j est égal au taux de recouvrement de chaque inducteur I_j et n est égal au nombre d'inducteurs élémentaires I_j appartenant à la zone de cuisson Z.Thus, by way of example, the basic power delivered by each inductor P _j I _j belonging to a heating zone Z is of the type: $${\mathrm{P}}_{\mathrm{j}}\mathrm{=}\left(\mathrm{px}{\mathrm{T}}_{\mathrm{j}}\right)/{\displaystyle \underset{j=1}{\overset{j=\mathrm{not}}{\Sigma }}}{\mathrm{T}}_{\mathrm{j}}$$

where P is equal to the predefined value of the heating power associated with this cooking zone Z, T _j is equal to the recovery rate of each inductor I _j and n is equal to the number of elementary inductors I _j belonging to the zone cooking Z.

A second mode of operation of the hob 20 as illustrated in FIG. figure 3 will be described now with reference to the figure 4 .

In this second operating mode of the hob 20, the hob is partitioned into several portions, each portion of the hob being associated with a predefined value of heating power.

The hob is thus pre-cut fictitiously into several portions respectively associated with predefined values of heating power. Depending on the membership of a cooking zone to one or other of these portions of the hob, a predefined heating power value is associated with the cooking zone.

Thus, when a container is placed on the hob and a cooking zone Z is thus detected, the heating power associated with this cooking zone is equal to the preset value of the heating power associated with the portion of the cooking zone. cooking plan.

In practice, in the exemplary embodiment illustrated in FIG. figure 4 , the hob is cut into three portions 25, 26, 27.

Of course, the number of three portions is only given as an example and can be less than or greater than 3.

Each portion 25, 26, 27 is associated with a predefined value of heating power P ₁₂ , P ₁₀ and P ₆ , respectively equal for example to 3000, 1500 and 500 W, for a medium-sized container covering approximately four elementary inductors 21 .

The preset heating power values P ₁₂ , P ₁₀ and P ₆ are stored by default in the centralized control means.

In this embodiment, the portions of the hob are substantially rectangular and arranged successively from one edge to the other of the hob.

Of course, the portions of the hob could be arranged from the center to the edges of the hob, the heating power associated with the central portion in the form of a circle being greater than the outer portion adjacent to the edges of the hob .

In this embodiment, the hob would thus be shared for example in a disk-shaped central zone, an intermediate zone annular, and an outer zone extending between the annular intermediate zone and the edges of the hob.

Furthermore, the hob 20 could also include adjustment means at the control panel 22, accessible to the user and allowing him to set beforehand the preset value of the heating power associated with each portion 25, 26 , 27 of the hob.

Although we have schematized figure 4 separations of the hob by rectilinear lines X, it may be preferable to take into account the arrangement of elementary inductors 21 arranged matrix.

As illustrated in figure 5 in practice, each portion 25, 26, 27 corresponds to a certain number of inductors, each elementary inductor 21 belonging in its entirety to one or other of these portions 25, 26, 27.

When a container such as the container referenced R ₁ on the figure 4 is placed on the cooking plane, and that the associated cooking zone belongs to a portion 25 of the hob, the control means in operation of the elementary inductors covered 21 are implemented to control in operation this cooking zone according to the heating power with preset value P ₁₂ .

As before, the predefined heating power P ₁₂ is distributed over the different elementary inductors 21 belonging to the cooking zone, as a function of the recovery rate of each inductor by the receptacle.

The user can modify the heating power delivered to the container R ₁ by moving it on the hob, and in this example, it can reduce the heating power from a maximum value to a minimum value by moving the container from the left to the right of the hob 20.

By moving the container on the cooking surface, in particular by positioning the container on an area overlapping two plan portions associated with predefined values of heating power, it is possible to obtain a variation of the heating power delivered to the container, between the extreme values of heating power associated with the portions of the hobs.

Thus, when the container is placed on the hob astride two portions of the hob, as is the case for the container referenced R ₂ on the hob. Figures 4 and 5 , which is placed both on the portions 26 and 27 of the hob, the preset value of the heating power P associated with the cooking zone thus detected is calculated proportionally to the membership of this cooking zone to the portions 26 , 27 of the hob.

Thus, an intermediate heating power associated with the container R ₂ corresponds to an average of the predefined values of the heating powers associated with each portion 26, 27 partially covered by the container.

The average of the powers can thus be weighted according to the recovery rate of each elementary inductor 21 belonging to the detected cooking zone.

As illustrated in figure 5 when the container R ₂ is disposed both on the portions 26 and 27 of the hob, the average takes into account the number of inductors covered by the container R ₂ and the recovery rate of each of these inductors 21.

• T₁ 100% ;
• T₂ = 100% ;
• T₃ = 100% ; et
• T₄ = 40%.

Thus, in this example, the container R ₂ covers four elementary inductors 21 whose recovery rates are as follows:

• T ₁ 100%;
• T ₂ = 100%;
• T ₃ = 100%; and
• T ₄ = 40%.

The predefined value of the intermediate heating power P associated with the cooking zone covered by the container R ₂ will be calculated, for example, as follows: $$\mathrm{P}\mathrm{=}\frac{\left({\mathrm{T}}_{\mathrm{1}}\mathrm{+}{\mathrm{T}}_{\mathrm{2}}\mathrm{+}{\mathrm{T}}_{\mathrm{4}}\right){\mathrm{<figure-callout\; id="10"\; label="P"\; filenames="imgf0001.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{10}}\mathrm{+}{\mathrm{T}}_{\mathrm{3}}{\mathrm{P}}_{\mathrm{6}}}{{\mathrm{T}}_{\mathrm{1}}\mathrm{+}{\mathrm{T}}_{\mathrm{2}}\mathrm{+}{\mathrm{T}}_{\mathrm{3}}\mathrm{+}{\mathrm{T}}_{\mathrm{4}}}$$

Other methods of proportional calculation of the power could also be implemented, for example taking into account the surface portion of the container belonging to each portion 26, 27 of the hob.

Thus, the user can, by moving the container on the hob, change the heating power associated with this container between the P ₁₂ to P ₆ values of available power.

This type of operation makes it possible to bring the use of modern hobs closer to the traditional use of wood or coal stoves, in which a hob has a temperature that varies according to the distance from the combustion chamber. These traditional stoves allow the user to realize different cooking, requiring a high heating power to grasp food, or conversely low heating power for simmering, judiciously positioning the cooking vessel at a specific location of the furnace.

Of course, many modifications can be made to the embodiments described above.

In particular, the heating element (s) of the hob constituting each hearth or cooking zone could also be radiant elements, electric heating resistors or gas burners, since a device for detecting the presence of a container can be implemented in parallel in the hob, for example by means of a matrix array of inductors for detecting the presence of a load placed on the hob.

Claims (13)

Cooking hob comprising a plurality of independent cooking hobs (F _i ) associated respectively with control means (C _i ) of a heating power of said cooking hearth and detection means (D _i ) of a cooking vessel with right of said cooking stoves, characterized in that said heating power (P _i ) associated with a cooking zone (F _i ) is equal to a predefined value and in that said control means (C _i ) are adapted to control in operation a cooking zone (F _i ) according to said heating power (P _i ) when a cooking vessel is detected in line with said cooking zone (F _i ). Cooktop according to claim 1, characterized in that said predefined values of the heating powers (P _i ) respectively associated with the cooking hobs (F _i ) are different from each other. Cooktop according to claim 2, characterized in that said predefined values of the heating powers (P _i ) respectively associated with the cooking hobs (F _i ) are increasing according to a series of cooking hobs arranged on one edge (11). ) to the other (12) of said hob (10). Cooktop according to one of claims 1 or 2, characterized in that a central cooking space is arranged in the center of the cooking hob, the other cooking hobs being arranged around the central hob, at the periphery of the hob. Cooktop according to claim 4, characterized in that the central cooking hearth is the focus of higher heating power and said other cooking stoves are lower heating power foci. Cooktop according to one of claims 1 to 5, characterized in that it comprises means (14) for adjusting said predetermined values of the heating powers (P _i ) associated with the cooking hobs (F _i ). Cooktop according to one of claims 1 to 6, characterized in that said cooking hobs (F _i ) consist of one or more induction heaters. Cooktop according to claim 7, characterized in that said one or more induction heating elements constitute said detection means (D _i ) of a container. Cooktop according to one of claims 1 to 8, characterized in that it comprises centralized control means (C) adapted to control the operation of said control means (C _i ) according to the information provided by said detecting means (D _i ) of a container in line with said cooking hobs (F _i ). Cooktop according to one of claims 1 to 9, characterized in that it comprises a cooking control key adapted to be activated when adding a new container to said hob. A method of controlling a hob according to one of claims 1 to 10, for heating a cooking vessel placed on the hob, characterized in that it comprises the following steps: - activation of a cooking control key; - Determination by the detection means of the cooking chamber on which is placed said cooking vessel; and - Implementation of said control means associated with the determined cooking focus to deliver the heating power to said preset value associated with said determined cooking focus. Control method according to claim 11, characterized in that it further comprises the following steps when said cooking vessel is moved from one hearth to another hearth: - Identification by the detection means of a new cooking chamber on which is placed said cooking vessel; and - Implementation of said control means associated with said new cooking stove identified to control in operation said new cooking chamber according to the heating power to said preset value associated with said new cooking stove identified. Control method according to one of claims 11 or 12, characterized in that it comprises a step of activating said cooking control key when adding a new container on said hob.

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