ES2319031A1 - Hob with a movable heating element - Google Patents

Abstract

The invention is based on a hob with a cooking area (10) with a plurality of heating zones (12a - 12o) on which cooking utensils (22) are positioned, with at least one movable heating element (14a - 14d), which is arranged below the cooking area (10), and with an actuator (16a - 16d) for moving the at least one movable heating element (14a - 14d). In order to design generic hobs to be more flexible, the invention proposes that the hob is equipped with a control unit (20) for actuating the actuator (16a - 16d) depending on at least one operating parameter (D).

Description

Cooking field with an element of movable heating.

The invention relates to a cooking field with a movable heating element according to the general concept of claim 1 and a method for operating a field of cooking according to the general concept of claim 20.

From the state of the art they are known various cooking fields with a cooking surface with several heating zones with different midpoint zone heating to place kitchen battery. From EP 0 556 251 B1 a cooking field with heating elements is known movable, arranged under a cooking surface and with a actuator to move the at least one heating element movable. The movement of the heating elements serves to homogenize a heat distribution in an area of heating, and the actuator can only move the elements of heating from one side to another under a heating zone respective. The movement is always equal and independent of a operating status of the cooking field.

The object of the invention is especially in making available a generic type cooking field and a procedure to operate a cooking field of this type with possibilities of use of the movable heating element especially flexible

According to the invention, the objective is achieved. by the characteristics of claims 1 and 20, while from the dependent claims can be extracted advantageous configurations and improvements of the invention.

The invention relates to a cooking field with a cooking surface with several heating zones with at least one movable heating element, arranged below the cooking surface and with an actuator to move the at least a movable heating element.

It is proposed that the cooking field comprises a control unit to operate the actuator in a dependent manner At least one operating parameter. In this way, you can make possible a variable use of the heating element movable, and the flexibility of the field of cooking.

It is especially proposed that the actuator be configured to move the movable heating element in a first operating state to a first zone of heating, and to move the movable heating element in a second operating state to a second zone of heating. In this way, an element of movable heating to heat several heating zones, and a selection can be made available to the user especially wide of different heating zones possible.

In generic cooking fields, the cooking surface is usually configured as a cooking plate ceramic hob, which is oriented horizontally in the operating configuration, and under which they are located The heating elements. With the indication that the element of  heating is "in the heating zone", by this must be understood in this context especially a state in the that the heating element is under a section of cooking surface area corresponding to the area heating

A surface section of the surface of cooking corresponding to the heating zone may be defined in embodiments of the invention by means of a graphic marking on the cooking surface or on the side bottom of a transparent cooking surface, and in others exemplary embodiments may be defined through that, in a given operating state, a heating power transmitted to the kitchen battery referred to a unit of surface exceeds a certain threshold value.

In another refinement of the invention, proposes that the cooking field comprises a sensor arrangement to identify a position and / or size of kitchenware placed on the cooking surface. Sensor arrangement it can be configured, for example, as an infrared sensor, where, however, others would also be thinkable configurations

If the cooking range has a unit of control to operate the actuator, where the control unit is configured to direct the movement of at least one element of movable heating dependently on sensor signals from The sensor arrangement, the movement can be adapted from advantageous way to the position and / or size of the kitchen battery identified.

Due to the high heating powers and at the rapid response times that are attainable with such heating elements, the advantages of the invention are especially effective if the at least one heating element Movable is configured as inductive heating element. Basically, configurations of the invention in which the heating element is configured as a radiation heating body. You can ensure a close contact of the heating element with the surface of cooking during a heating phase if the cooking field presents a means to press the heating element to the lower side of the cooking surface. Especially then yes The heating element is a heating body by induction, you can then ensure a good transmission and Complete heating power.

The inductive heating element also It can be used simultaneously as a sensor and, if necessary, other sensors can be suppressed if the sensor arrangement for automatic identification of a position and / or battery size kitchen placed on the cooking surface compares at least a parameter of an impedance of the heating element inductive movable in at least two positions.

In this case, the parameter can be an angle. of loss, inductivity or resistance. Of course, combinations of these sizes can also be used.

If the sensor arrangement has a sensor infrared, safe detection of the cookware also in the case of heating elements inactive inductants, and surveillance can be made possible permanent cooking surface.

According to a configuration of the invention especially simple and robust when it comes to construction refers, the actuator comprises an electric motor.

A diversity can be made possible especially wide of shapes and sizes of the areas of heating without confusing the user, presenting the surface cooking markings to visualize the different areas of heating. The markings can be permanently visible and / or can selectively display the areas of heating depending on an operating mode chosen one. In the latter case, the markings could present, by example, light rings or light emitting diodes, which could be connected or disconnected depending on the mode of functioning.

Through a control unit to operate the actuator that is intended to define a heating zone to heat the kitchen battery depending on the size identified of the kitchen battery, the position and / or size of the heating zone can be adapted to the position and / or size of the cookware by proper displacement of the movable heating element. In this context, it must understood as "planned" also "configured" or "equipped".

If, in addition, the control unit is provided to determine a number of heating elements for heat the defined heating zone, the power of heating and a total area can be varied even in greater extent.

In this case, the heating power of a heating zone can be multiplied compared to the operation of the heating zone with only one element heating, if the control unit is intended for determine a number of heating elements to heat the heating zone defined dependently on a power heating required by the user.

Alternatively or additionally to this, it proposes that the control unit be planned for at least one operating status, move the heating element movable alternately in at least two heating zones spatially separated to heat two battery elements of kitchen. In this way, a heating element can be use to simultaneously heat two zones of heating. This is especially convenient when none of the two heating zones need all the power of heating of the heating element. Due to the rapid response behavior of heating bodies by induction, this configuration of the invention is usable in special in relation to such heating bodies by induction. The frequency with which the heating element is moved between the two heating zones can be determined dependent on the speed with which the actuator moves The heating element. As an example, the period assigned to the frequency can amount to between 1 and 100 seconds.

If the cooking field also has a unit input to enter an input parameter for a heating power, where the heating zone should be heated with this heating power and where the unit of command determine the heating powers of the number set of heating elements in the area of relative heating dependent on a single input parameter, the heating power can be specially adapted to the need. The user you should not take care of the heating power setting of the individual heating elements.

Through a control unit to operate the actuator that chooses the at least one heating element for generate the desired heating power dependently of the output signal of the sensor arrangement, you can choose always in an advantageous way that heating element that less needed in other heating zones. The assignment fixed between heating zones and heating elements are can cancel and, in this way, you can increase the flexibility.

If the control unit is intended to choose the heating element depending on the size of the Cookware detected, can ensure a power of uniform heating on the base surface of the battery kitchen.

It is also proposed that the sensor arrangement is intended to detect an edge of the kitchen battery to identify the size and / or position of the kitchen battery on the cooking surface The optical and magnetic characteristics they change at the edge especially sharply, so that makes possible an especially precise identification. If known the location of the edge, an area of heating adapted to the need especially well in the Size and shape.

By means of a control unit to operate the actuator that is intended to move at least one of the elements heating elements assigned to a heating zone of such that a surface of the directed heating element towards the cooking surface cover the heating zone, it it can homogenize more a medium heating power by a surface of the heating zone.

It is also proposed that the control unit be intended to move the heating element in a path periodic. When this happens, a production can be carried out of uniform heat mechanically especially easily and robust, if the control unit is intended to move the element of heating in a circular path.

If the cooking field has at least one other heating element, where the actuator is configured to move the movable heating element in a first state of operation to a first heating zone, which is heated only by the movable heating element, and for move the movable heating element in a second state of operation to a second heating zone that is heated jointly by the movable heating element and the other heating element, in the first state of operation you can use a small heating zone, and in the second operating state a zone can be used large heating, where both are heated at least partially by the same movable heating element.

The position of the second heating zone large, heated together by both elements of heating, can be freely chosen to the greatest extent if the another heating element is also movable and in the second operating status is moved below the second zone of heating by an actuator unit.

By at least four elements of movable heating that are designed to heat in a first operating state smaller heating zones and, in a second operating state, heat so joint a large heating zone, you can get a heating zone heated by four elements of heating, especially large and high power.

Regulated operation is possible using a temperature sensor to measure the temperature of the cooking surface in the area of a heating zone, where in a particularly advantageous configuration the sensor of temperature is movable together with the heating element.

Using the movable temperature sensor, can ensure that it always measures the temperature in an area central heating zone. In this case, it can be avoided a scratch on the cooking surface by means for remove the temperature sensor from the bottom side of the cooking surface during a movement of the element of heating.

It is also proposed that the cooking field have a means to choose a heating zone and a medium to adjust a heating power of the zone of chosen heating, where a control unit to operate the actuator is configured to automatically move the element heating movable to the chosen heating zone, if the adjusted heating power of the heating zone chosen is greater than zero and if the movable heating element It is outside the chosen heating zone. This form, the allocation of heating elements to the zones heating can take place largely without intervention explicit of a user.

A mechanism of silent and wear-free movement by a magnetic actuator to move the movable heating element.

In addition, the invention relates to a procedure to operate a cooking field with a surface Cooking with several heating zones with different point heating zone medium to place cookware with at least one movable heating element, arranged below The cooking surface.

It is proposed that the heating element movable be moved in a first operating state to a first heating zone, and that the heating element movable be moved to a second heating zone in a Second operating state.

Other advantages are taken from the following Description of the drawings. In the drawings they are represented Examples of embodiment of the invention. The drawings, the description and the claims contain numerous combined features. Advantageously, the expert in the matter will also consider the characteristics so individual, and will gather them in other convenient combinations.

The figures show:

Figure 1 a cooking field with four heating elements in an initial configuration with four heating zones,

Figure 2 the cooking field of Figure 1 in a configuration with a central heating zone,

Figure 3 the cooking range of Figures 1 and 2 in an operating state with a very warm zone big,

Figure 4 the cooking field of Figures 1 a 3 in a configuration with a heating zone heated by two heating elements,

Figure 5 the cooking field of Figures 1 a 4 in a configuration with a large heating zone, heated by two heating elements,

Figure 6 a schematic representation for the movement of a heating element in an area of heating, which has a diameter greater than the element of heating,

Figure 7 a schematic representation for the movement of a heating element in an area of heating, whose diameter is larger than twice the heating element diameter,

Figure 8 a cooking field with four zones of large heating and four heating elements whose diameter is smaller than the diameter of the areas of heating,

Figure 9 a schematic representation of a sensor device to identify a battery position and size cooking

Figure 10 an alternative cooking field with two heating elements and with a diversity of zones of heating,

Figure 11 the cooking field of Figure 10 in a working state with two pots,

Figure 12 the cooking range of figures 10 and 11 during a first heating phase of a state of operation, in which the heating element heats two heating zones alternately,

Figure 13 the cooking range of figures 10 to 12 during a second heating phase of a state of operation, in which the heating element heats two heating zones alternately,

Figure 14 the cooking range of figures 10 to 13 during a heating phase according to figure 13, in the which heating element moves inside the second heating zone,

Figure 15 a cooking field with an element of movable heating with a movable temperature sensor and a means for removing the temperature sensor from a lower side of the cooking field and

Figure 16 a schematic view of a unit of input to enter an input parameter for a power heating, with which the area of defined heating and with a means to choose an area of heating.

Figure 1 shows a cooking field with a cooking surface 10 with several heating zones 12a-12d with different midpoint of zone of heating to place kitchen battery, and with four elements heating elements 14a-14d, arranged below the cooking surface 10, each with an actuator 16a-16d to move the heating element respective 14a-14d. The actuators 16a-16d are only schematically represented and they can be simple electric motors that drive a mechanism of movement such as cable traction, zippers or similar.

Actuator 16a-16d is configured to move the movable heating element respective 14a-14d to a first zone of heating 12a-12d in a first state of operation, and to move the movable heating element 14a-14d to a second heating zone 12e (figure 2) in a second operating state to heat the second heating zone 12e. For this, the margin of movement of heating elements 14a-14d essentially throughout the cooking field, where, to avoid overheating a housing, represented here, an edge of the cooking surface 10 can remain inaccessible to the heating element 14a-14d.

The movement produced by the actuators 16a-16d is managed or regulated by a unit of control 20. Control unit 20 directs the movement of the heating elements 14a-14b shape dependent on a state of operation that determines the less partially automatically depending on the Cookware detected.

The configuration shown in Figure 1 is corresponds to an initial configuration, in which the four heating elements 14a-14d at the point middle are each at the midpoint of four rectangles  same-sized imaginary in which you can divide the rectangular cooking surface 10. In the initial configuration, the edges of the plate-shaped heating elements 14a-14d define the edges of four zones of heating 12a-12d, whose diameter essentially 12 cm., that is, except less than 2 cm., corresponds to the heating element diameter 14a-14d.

In the embodiment shown in the Figure 1, heating elements 14a-14d are configured as induction heating elements and They comprise powerful induction coils.

The cooking field comprises an arrangement of sensor 18 described below with an infrared sensor (here represented only schematically), through which the unit of command 20 permanently monitors if and at what point it is placed a kitchenware element, for example a pot, on the cooking surface 10. The control unit 20 determines with help of the sensor arrangement 18 the contact surface of the kitchen battery element with cooking surface made of ceramic hob 10, and defines a heating zone round to heat the identified kitchen battery automatic as the smallest possible circle in which it is Contained the contact surface.

The control unit determines in particular the diameter D and the center of the heating zone. Diameter D It is an operating parameter calculated by the control unit 20 depending on the sensor signals of the arrangement of sensor 18.

In alternative configurations of the invention, the control unit 20 can determine the heating zone of form dependent on the sensor signals of the arrangement of sensor 18 otherwise, for example, by choosing a appropriate shape and size of the heating zone of a countable amount of possible shapes and sizes of the area of heating.

From the following it is obvious that in alternative configurations of the invention the control unit 20 you can also define the heating zone in ways that differ from the circular shape. The control unit 20 drives then in operation the actuator 16a-16d of form dependent on the sensor signals of the arrangement of sensor 18, and move with the help of actuator 16a-16d the heating element 14a-14d to the zone of heating defined above.

According to the definition of the heating zone, a control software implemented in the control unit 20 determine a number of heating elements 14a-14d to heat the heating zone defined. Figure 2 shows the cooking field of Figure 1 in a configuration with a large central heating zone 12e, which was defined by the control unit 20 due to a pot of especially large cooking 22 placed in the middle of the cooking surface 10. Since to heat the area of heating four heating elements are necessary 14a-14d, the control unit 20 moves through the 16a-16d actuators heating elements 14a-14d diagonally to the heating zone 12e or, what is the same, below the heating zone 12e, so that the heating power of all of the four heating elements 14a-14d is at disposition to heat the cooking pot 22 or the pan.

Thus, actuators 16a-16d they are configured as far as construction is concerned to move the respective movable heating elements 14a-14d in a first operating state at a respective first heating zone 12a-12d represented in figure 1, which is heated only by the movable heating element 14a-14d, and for move movable heating element 14a-14d moved by the corresponding actuator 16a-16d in a second operating state to a second zone of central heating 12e (figure 2) with a diameter D, which is jointly heated by all four elements heating 14a-14d. The four elements of movable heating 14a-14d are configured to, in a first operating state, heat the four small heating zones 12a-12d and, in a second operating state, jointly heat a large heating zone 12e.

If the diameter D of the heating zone defined by the control unit 20 due to the sensor signals exceeds a minimum value stored in a unit of storage, the control unit 20 connects a mode of operation that is schematically represented in the figure 3. When this happens, the cooking field is operated with a zone of heating very large 12f, being moved each of the four heating elements 14a-14d by the control unit 20 in a circular path. Points means of the circular paths refer to the midpoint of the very large circular heating zone with the same radius and evenly distributed around the perimeter over a distance of 90 ° In a possible configuration of the invention, the unit of knob 20 also slowly moves the midpoints of the four circular paths around the midpoint of the area of very large heating to get a heat distribution especially uniform. In this configuration of the invention, the heating elements 14a-14d may be arranged on a carousel-like movement mechanism, and be moved by an articulated arm with two or more joints

Figure 4 shows the cooking range of the Figures 1 to 3 in a configuration with a heating zone 12g heated by two heating elements 14a-14d. For this, the control unit 20 joins from the initial configuration represented in figure 1 the two heating elements 14a, 14b represented in the figures on the left, so that they heat the area together 12g heating that is between the two positions initials of both heating elements 14a, 14b.

If a size of the heating zone combined 12g combined is smaller than a threshold value or if it was detected an elongated pot, heating elements 14a, 14b remain during a warm-up phase in positions represented in figure 4. But if the diameter D of the zone of 12g heating or the kitchen battery detected by the sensor arrangement 18 is greater than a threshold value, the unit of knob 20 moves the movable heating elements 14a, 14b assigned to the heating zone 12g so that a surface of the heating elements 14a, 14b directed towards  the cooking surface 10 covers the heating zone 12g and generates a uniform heating power in the middle. By of course, other configurations of the invention are thinkable in which heating elements always move or never.

In this case, the control unit 20 can fix one of the heating elements 14a in the middle of the zone of heating 12g and moving the other heating element 14b, as depicted in figure 5, in a circular path around the fixed heating element 14a or, so Alternatively, you can move both heating elements 14a, 14b in concentric or equal circular paths. In addition, it would be thinkable to move both heating elements 14a, 14b in lemniscata-shaped trajectories, which could also be by example rotated 90 ° with respect to each other.

Also if a defined heating zone by the control unit 20 in a manner dependent on the signals of sensor is heated only by one of the heating elements movable 14a, in a configuration of the invention represented in Figure 6 the corresponding heating element 14a is moved by the control unit 20 in a periodic path. For the control unit 20 directs the heating element 14a in a circular path, if the diameter D of the zone of heating is between the diameter of the element of heating 14a of 12 cm. and double the diameter of the element of heating 14a.

Figure 7 shows a representation schematic for the movement of a heating element 14a in a heating zone 12i, whose diameter D is larger than twice the diameter of the heating element 14a. He heating element 14a is cyclically moved at positions indicated in figure 7 by circles to guarantee a heating power as homogeneous as possible. In the indicated positions, the heating element 14a stops for a period of time, which is dependent of a response time of the induction system.

Figure 8 shows an example of a field Cooking with four large heating zones 12a-12d, which are heated by four respective heating elements 14a-14d of mode explained by means of figure 7, whose diameter is more smaller than the diameter of the heating zones 12a-12d.

Figure 9 is a schematic representation of an alternative sensor arrangement 18 'to identify a position and size of kitchen battery 22. The sensor arrangement 18 'employs the induction coils of the elements of heating 14a-14d as sensor elements. The 18 'sensor arrangement for automatic identification of a position and / or size of kitchen battery 22 placed on the cooking surface 10 compares at least one parameter of an impedance of the movable inductive heating element 14a in at least two positions. For this, the control unit 20 detects and stores the complex value impedances measured by the sensor arrangement 18 and determines the angle of loss, is say, the impedance phase, inductivity as the real part of impedance and resistance as the real part of the impedance.

Due to the inductivities and resistances of heating arranged in the kitchen battery 22, the resistance is approximately proportional to the overlap between the base of the cookware 22 and heating element 14a. For the general, the radius and the midpoint of the battery base of kitchen can be found out from the progression of the impedance during a radial movement of the element of heating 14a referred to the midpoint of the battery base Cooking To explore the kitchen battery, the control unit 20 can move the heating element 14a also by a crosslinked or you can use another search algorithm appropriate.

To identify the size and / or position of the cookware on cooking surface 10, the arrangement of sensor 18 'detects an edge of the kitchen battery 22. The 18 'sensor arrangement can use the inductors of the heating elements 14a-14d so alternative or additional to the infrared sensor described above.

Figure 10 shows a cooking field alternative with only two heating elements 14a-14b that can heat a plurality of zones heating 12j-12o with six possible points heating zone means. The user can choose the zone 12j-12o heating through a panel contact sensitive control 24 or, in an exemplary embodiment alternatively, the choice occurs through the placement of a cooking pot 22a, 22b near the midpoint of zone corresponding heating. Figure 10 shows a initial setting of the cooking field. The surface of cooking 10 of the cooking field has stamped markings to visualize the different midpoints of zone of heating. Since the size and shape of the areas of 12j-12o heating is variable as in the Examples of embodiment described above, the reference symbols 12j-12o indicate the midpoints of zone of respective heating.

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Figure 11 shows the cooking field of the Figure 10 in an operating state with two cooking pots 22a, 22b that were placed over the midpoint of the zone of right lower and upper right heating of the representation. The cooking pots 22a, 22b are identified by sensor arrangement 18 or due to the choice performed by the user in the control panel 24, and the unit of command 20 starts an operating program, in which the right heating element, configured as inductor 14a, 14b simultaneously heats the upper heating zone right 12m and the lower right heating zone 12o. TO from the initial configuration represented in figure 10, the control unit 20 moves for this the right of the two elements heating 14a, 14b to the upper heating zone right 12m and heat this heating zone first 12m Figure 12 shows the cooking range of Figures 10 and 11 during the first phase of heating the state of operation, in which the heating element 14b heats alternately two heating zones 12m, 12o.

Figure 13 shows the cooking range of the Figures 10 to 12 during a second heating phase of the operating state, in which the heating element 14b alternately heats two 12m heating zones, 12th. After the completion of the first heating phase, the control unit 20 drives the heating element 14b to the second heating zone 12o and activates it. The zones of heating 12m, 12o are alternately heated in such a way form that is changed periodically between the settings of the Figure 12 and Figure 13. The person skilled in the art can determine adequately the frequency dependently on a actuator speed (not shown) and for the optimization of heating effect

Figure 14 shows the cooking range of the Figures 10 to 13 during a heating phase that corresponds to the heating phase according to figure 13. During the second heating phase, the control unit 20 moves the heating element 14b in a circular path. Of course, it can be used depending on the size and 12o heating zone shape any path suitable for movement of heating element 14b within the heating zone 12o. When this happens, unity of control 20 should move the movable heating element 14a, 14b assigned to the heating zone 12o or the elements of movable heating 14a, 14b assigned to the heating zone 12o such that a surface of the heating element directed towards heating zone 12o covers so evenly as possible the heating zone 12o in the course of A period of movement.

Figure 15 schematically shows a field of cooking with a movable heating element 14a and with a movable temperature sensor 26 and a medium configured as linear transmitter 28 to remove the temperature sensor 26 from a lower side of the cooking field. Before each move, the middle remove temperature sensor 26 from the bottom side of the field  Cooking Actuator 16a then moves the temperature sensor 26 together with the movable heating element 14a at a final position of the movement, in which the middle 28 returns to press the temperature sensor 26 to the lower side of the field cooking, to make a good heat contact possible. Thus,  the temperature sensor 26 is always moved together with the element heating 14a and is always in the area of variable heating that precisely heats the element of relative heating 14a. In a configuration of the especially advantageous invention, each of the elements of movable heating 14a-14d of a field of cooking has a temperature sensor 26 of the type represented in Figure 15

Figure 16 shows a schematic view of an input unit 30 to enter an input parameter for a heating power with which it must be heated the defined heating zone and with a means 32 to choose a heating zone configured with the same construction as the control panel 24. While the input unit 30 is composed  essentially of a rotary knob, which could also be replaced by arrow keys to choose the heating power, the medium 32 to choose the heating zone is composed essentially from a sensor field sensitive to contact with six capacitive contact sensors, which are arranged so corresponding to the midpoints of the heating zone.

The user can choose an area of heating by simple actuation of the sensors Contact. The choice is visualized by a light-emitting diode in the area of the contact sensor and, if necessary, also on the cooking field in the midpoint area of the heating zone selected. Then the user can choose a power of heating of the desired heating zone through the input unit 30. As soon as a power has been chosen non-zero heating for one of the zones of 12j-12o heating and if the element of movable heating 14a, 14b is outside the zone of heating chosen, the control unit 20 moves one of the heating elements 14a, 14b to the corresponding place and explore the size of the kitchen battery placed there from the way described above. The adjustments made can be shown through a display not shown here.

If the heating power exceeds a threshold value dependent on the size of the heating zone determined by the size of the kitchen battery, the unit of knob 20 automatically moves two or more of the elements of heating 14a-14b to the heating zone concerning. Accordingly, the control unit 20 determines a number of heating elements 14a-14b to heat the heating zone defined in a way dependent on a heating power required by a Username.

If several heating elements are used 14a-14d to heat a heating zone, the control unit 20 directs the heating powers of the number determined of heating elements 14a, 14b of the zone of relative heating dependent on a single input parameter that the user can enter through the input unit 30. Thus, the user must not determine the heating powers of the heating elements participants 14a, 14b individually.

Although in the above embodiment examples only heating elements are always described 14a-14d with the same size and the same power of heating, the notion of the invention is, of course, applicable also to cooking fields with heating elements 14a-14d with different powers of heating.

The control unit 20 determines shape dependent on the output signal of the sensor arrangement 18 which of the heating elements 14a-14d is used to generate the desired heating power, of so that short motion paths can be achieved and can prevent collisions of movable heating elements 14a, 14b.

Therefore, in the control unit 20, implements a procedure to operate a cooking field with a cooking surface 10 with several heating zones 12th-12th to place kitchenware, with at least a movable heating element 14a-14d, arranged below the cooking surface 10.

According to the procedure according to the invention, the movable heating element 14a-14d is moved in a first state of operation to a first heating zone, and the element movable heating 14a-14d is moved in a second operating state to a second zone of heating. 12th-12th heating zones they can have different midpoints of heating zone, different shapes and / or different sizes. Also, the allocation of heating elements 14a-14d to the zones 12j-12o heating takes place dependent on the size detected through the sensor unit of the detected kitchen battery and / or the heating power required

Reference numbers

10

Cooking surface

12

Heating zone

14

Heating element

16

Actuator

18

Sensor layout

twenty

Control unit

22

Cooking pot

24

Control Panel

26

Temperature sensor

28

Means, medium

30

Input unit

32

Means, medium

Claims (20)

1. Cooking range with a cooking surface (10) with several heating zones (12a-120) to place a cookware (22), with at least one movable heating element (14a-14d), arranged below the cooking surface (10) and with an actuator (16a-16d) to move the at least one movable heating element (14a-14d), characterized by a control unit (20) that is configured to operate the actuator (16a- 16d) dependently on at least one operating parameter (D). 2. Cooking field according to claim 1, characterized in that the actuator (16a-16d) is configured to move the movable heating element (14a-14d) in a first operating state to a first heating zone (12a-12d) , and to move the movable heating element (14a-14d) in a second operating state to a second heating zone (12e-120). 3. Cooking field according to one of the preceding claims, characterized in that the at least one movable heating element (14a-14d) is configured as an inductive heating element. 4. Cooking field according to one of the preceding claims, characterized by a sensor arrangement (18) for the identification of a position and / or a size of cookware (22) placed on the cooking plate (10). 5. Cooking field according to claim 4, characterized in that the control unit (20) is configured to direct the movement of at least one movable heating element (14a-14d) in a manner dependent on sensor signals of the sensor arrangement (18). 6. Cooking field according to claim 4 or 5, characterized in that the sensor arrangement (18) compares at least one parameter of an impedance of the movable inductive heating element (14a-14d) in at least two positions for the automatic identification of a position and / or size of cookware (22) placed on the cooking surface (10). 7. Cooking field according to one of the preceding claims, characterized in that the cooking surface (10) has markings to visualize the different heating zones (12th-12th). 8. Cooking field according to one of the preceding claims, characterized in that the control unit (20) is designed to, depending on the identified size of the cookware (22), define a heating zone (12-12) ) to heat the cookware (22). 9. Cooking field according to claim 8, characterized in that the control unit (20) is provided to determine a number of heating elements (14a-14d) for heating the defined heating zone (12a-12o). 10. Cooking field according to claim 8 or 9, characterized in that the control unit (20) is provided to determine a number of heating elements (14a-14d) to heat the defined heating zone (12a-12o) in a way dependent on a heating power required by a user. 11. Cooking field according to one of claims 8 to 10, characterized in that the control unit (20) is provided to, in at least one operating state, move the movable heating element (14a-14d) alternately in at least two spatially separated heating zones (12a-12o) to heat two kitchenware elements (22a, 22b). 12. Cooking field according to one of claims 8 to 11, characterized by an input unit (30) for entering an input parameter for a heating power, with which the defined heating zone (12a-12o) must be heated, where the control unit (20) determines the heating powers of the determined number of heating elements (14a-14d) of the respective heating zone (12a-12o) in a manner dependent on a single input parameter. 13. Cooking field according to one of the preceding claims, characterized in that the control unit (20) is provided for in a heating phase to move at least one of the movable heating elements (14a-14d) assigned to an area of heating (12a-12o) such that a surface of the heating element (14a -14d) directed towards the cooking surface (10) covers the heating zone (12a -12o). 14. Cooking field according to one of the preceding claims, characterized by at least one other heating element (14a-14d), wherein the actuator (16a-16d) is configured to move the movable heating element (14a-14d) in a first operating state to a first heating zone (12a-12d), which is heated only by the movable heating element (14a-14d), and to move the movable heating element (14a-14d) in a second operating state to a second heating zone (12e-12o), which is jointly heated by the movable heating element (14a-14d) and the other heating element (14a-14d). 15. Heating field according to claim 14, characterized in that the other heating element (14a-14d) is also movable, and in the second operating state is moved by an actuator (16a-16d) below the second zone of heating (12th-12th). 16. Cooking field according to one of claims 14 and 15, characterized by at least four movable heating elements (14a-14d) that are configured to heat smaller heating zones (12a-12d) in a first operating state, and to heat together a large heating zone (12e-12o) in a second operating state. 17. Cooking field according to one of the preceding claims, characterized by a temperature sensor (26) for measuring the temperature of the cooking surface (10) in the area of a heating zone (12-12), where the Temperature sensor (26) is movable with the heating element (14a-14d). 18. Cooking field according to one of the preceding claims, characterized by a temperature sensor (26) for measuring the temperature of the cooking surface (10) in the area of a heating zone (12-12), where the Temperature sensor (26) is movable with the heating element (14a-14d). 19. Cooking field according to one of the preceding claims, characterized by means (32) for choosing a heating zone (12-12) and an input unit (30) for adjusting a heating power of the heating zone. selected heating (12a-12o), where a control unit (20) for operating the actuator (16a-16d) is configured to move the movable heating element (14a-14d) automatically to the chosen heating zone (12a -12o), if the adjusted heating power of the chosen heating zone (12a-12o) is greater than zero, and if the movable heating element (14a-14d) is outside the chosen heating zone (12a- 12th). 20. Procedure for operating a cooking field with a cooking surface (10) with several heating zones (12a-12o) to place a cookware (22) and with at least one movable heating element (14a-14d), disposed below the cooking surface (10), characterized in that the movable heating element (14a-14d) is moved in a first operating state to a first heating zone (12a-12d), and the movable heating element ( 14a-14d) is moved in a second operating state to a second heating zone (12e-12o).