EP2988573A1 - Cooking field device, and method for operating the same - Google Patents

Abstract

Cooking field device (1) and method for operating a cooking field device (1) with a hob (2), which comprises a plurality of induction coils (3), which are distributed substantially uniformly over the hob (2), wherein a detection device (4) is provided, which comprises an evaluation device (5) and a signaling device (6). In this case, the evaluation device (5) is suitable and designed to recognize pot positions (7, 8, 9, 10, 11) on the hob (2) and output a signal (12) via the signal device (6) if at least one predetermined minimum distance (13) between at least two pot positions (7, 8, 9, 10, 11) has fallen below. If there is a minimum distance between two pot positions, a signal is output.

Description

The present invention relates to a cooking field device with at least one hob, which comprises a plurality of induction coils, which are arranged distributed substantially uniformly over the hob. In addition, the present invention relates to a method for operating such a cooking field device.

There are cooktops with induction coils have become known, which have predetermined cooking zones, on which one or more cooking vessels can be placed. To assist a user in selecting a cooking zone advantageous to the cooking vessel size and / or cooking vessel bottom geometry, the individual cooking zones may be highlighted in a suitable manner. It can be z. B. be provided on the footprint of the hob an imprint that indicates the individual cooking zones, for example by means of an imprint, edged or otherwise marked.

In order to ensure a particularly flexible use of a hob, it is advantageous if a hob has a plurality of smaller induction coils, which are interconnected as accurately as possible depending on cooking vessel size and / or Gargefäßbodengeometrie. Then no predefined, but flexible cooking zones are provided. Thus, a cooking vessel can be placed at almost any location on a hob, with only the induction coil located under the cooking vessel are activated.

Such a hob is in the WO 2009/083279 A1 disclosed. Similar hobs are in the pamphlets EP 2 242 328 A2 and US 2007/0164017 A1 described.

In such flexible usable hobs, it can happen that a user puts two pots too close together. In this case, in particular, the cooking result of at least one pot can be adversely affected if the pots are placed on the hob in such a way that both pots use one or more induction coils together. Then, for example, it may happen that the two pots are operated at a different power, whereby the shared induction coil is not optimally set for at least one pot. As a result, the effectiveness of the hob may be affected.

In order to avoid this, systems have become known which indicate or prescribe flexible user zones for a user. However, such systems are often expensive to construct and also not easy to understand. A user must then follow exact instructions and / or deal more intensively with the construction of the hob. This overburdens some users and may affect the ease of use of the hob.

It is therefore the object of the present invention to provide a cooking field device with a plurality of induction coils and a method for operating a cooking field device, with which a user is pointed out in a simple manner on a more effective use of the cooking field device.

This object is achieved by a cooking field device with the features of claim 1 and by a method for operating a cooking field device with the features of claim 9. Preferred developments of the invention are the subject of the dependent claims. Further advantages and features of the invention will become apparent from the embodiments.

The cooking field device according to the invention has at least one hob, which comprises a plurality of induction coils. The induction coils are arranged distributed substantially uniformly over the hob. At least one identification device is provided which comprises at least one evaluation device and at least one signal device. In this case, the evaluation device is suitable and designed to recognize pot positions on the hob and output via the signal device, a signal when at least a predetermined minimum distance between at least two pot positions is reached.

According to the invention, the detection device is preferably designed as a so-called cooktop manager, which provides an extended pan detection, with which the pot positions can be determined on the hob.

Under a pot position is particularly to understand the position on the hob on which a pot or other cooking vessel is placed. In this case, the recognition of pot positions in particular means that it can be detected by the detection device, whether a pot is set up and where this pot is placed.

According to the invention, the evaluation device is suitable and designed to recognize different pot positions on the hob and to check whether a predetermined minimum distance is exceeded. This predetermined minimum distance is preferably a concrete distance between two pot positions or a non-predetermined distance genknüpft to certain conditions.

The cooking field device according to the invention offers many advantages. A significant advantage is that the cooking appliance according to the invention is provided by the detection device of the invention, with which a user is informed in a simple manner may be that the positioning of different pots can be optimized. For example, if two pots are too close together, this is communicated to the user by a simple signal. In this case, such a simple signal is to be understood in particular as a simple light signal or else as a simple sound signal.

A user is preferably proposed or prescribed no specific action, so that a user can freely decide whether he wants to change the pot positions or at least one pot position in order to optimize the effectiveness of the hob.

Since the cooking hob according to the invention a very simple signaling device can be used, the z. B. can also be integrated into existing display devices of cooking hob, also a particularly cost-effective detection device is provided.

Preferably, the evaluation device is suitable and designed to recognize the pot positions associated induction coils on the hob. Then, a signal is preferably output via the signal device if at least one induction coil is assigned to two pot positions. In such an embodiment, the predetermined minimum distance is then fallen below when a certain condition is met. The special condition here is the common use of an induction coil for two pot positions. Thus, the evaluation device can recognize that two pot positions are subject to a predetermined minimum distance, since the pots assigned to the pot positions must be so close to each other that they at least partially stand up on the same induction coil. The induction coils associated with a pot position are all induction coils that are activated or used by the currently set-up pot of the pot position.

Particularly preferably, the evaluation device is suitable and designed to evaluate the power setting of the pot position. This makes it possible, in particular, for the evaluation device to only evaluate a subset distance as critical and output a signal if at least one predetermined minimum size of the power settings of the different pot positions differs. So it is z. B. possible that two pot positions use at least one common induction coil, wherein the two pot positions have the same power settings. Then both pot positions can be operated with the same control level, so that the evaluation device comes to the conclusion that the use of a common induction coil does not adversely affect the cooking result. However, should a given minimum size of the power settings be different, the evaluation device is the undershoot minimum distance as critically evaluate and issue a signal. This is the case in particular when different cooking operations are carried out on the different pot positions. If meat is seared at a pot position and only simmered at a low level on the pot position that is too close, the shared induction coil can not be used optimally for both cooking operations. Then the evaluation device outputs a signal via the signal device, which indicates to the user that two pot positions are selected too close to each other and that he can change the pot distance for optimum use of the hob.

Preferably, the evaluation device comprises at least one sensor device. With such a sensor device, one or more pot positions can be detected on the hob. It is also possible that the distance between the two pot positions or a minimum distance between two pot positions is checked. In this case, the sensor device can preferably be provided integrated on the hob or in the hob. In other advantageous embodiments, however, the sensor device can also be provided independently of the hob. Then, the sensor device z. B. be provided above the hob on a cooker hood.

In expedient developments, the sensor device is provided at least one induction coil or between at least two induction coils. So it can be easily found out whether an induction coil is assigned to a pot position or to several pot positions.

The sensor device preferably comprises at least one active and / or passive sensor. At least one sensor is particularly preferably an inductive, acoustic, optical and / or capacitive sensor. Such a sensor may also preferably or exclusively be a sound and / or vibration emitting / receiving sensor. In particular, the use of an ultrasonic sensor is preferred. By means of the aforementioned sensors, it is possible to reliably detect the pot positions on the hob.

The signal device preferably comprises at least one optical and / or at least one acoustic output device. In this case, an optical output device in the simplest case z. B. be a light emitting diode or other light emitting device that is activated when falling below a minimum distance or flashes. Preferably, however, it is also possible that the optical output device is integrated into an already existing output device of the cooking field device or is also designed as a separate display. On such a separate display may preferably be a schematic image of the cooking field are displayed with the current pot positions, whereby the pot positions can be visually highlighted, which are below a minimum distance to another pot position. An acoustic output device can, for. B. be a small speaker. Simple audio signals can then be output via such a loudspeaker in order to inform a user that two pots are placed too close together and the user can improve the effectiveness of the cooktop by changing the pot positions.

The inventive method is suitable for operating a cooking field device with at least one hob, which comprises a plurality of induction coils. In this case, the induction coils are arranged essentially uniformly over the hob, and a detection device is additionally provided which comprises at least one evaluation device and at least one signal device. The evaluation recognizes pot positions on the hob and outputs a signal on the signaling device when at least a predetermined minimum distance between at least two pot positions is reached.

Under a pot position according to the invention is the position of a pot on the hob to understand. When detecting the pot positions, it is detected whether a pot is set up and where this pot is placed on the hob.

The method according to the invention also offers many advantages. A significant advantage is that a user can be easily informed that at least two pot positions are too close to each other on the hob. As a result, the hob may not be used optimally.

A user is then informed by a simple signal that he can optimize the efficiency of the hob or the cooking processes in the different pot positions. Whether a user responds to this hint, he can decide freely. In this particularly simple, yet reliable way of pan detection with reference to the user, the user namely no action instructions or rules of action are given. Thus, a user may be advised in a non-intrusive manner that the use of the hob can be optimized. Thus, the user does not perceive the hint as an indication that he has done something wrong, but that the cooking field device can be used even better.

Preferably, the evaluation recognizes the pot positions associated induction coils on the hob and outputs via the signal device from a signal when at least one induction coil is assigned to two pot positions. Then, preferably, the minimum distance is linked to at least one condition. Namely, the minimum distance is below that when two pots share at least one induction coil. The evaluation device particularly preferably evaluates the power setting of the pot positions and outputs only one signal via the signal device if the power setting of the pot positions differs in at least one predetermined minimum size. In this case, the falling below of a minimum distance by the evaluation device is evaluated as critical only when two pot positions share an induction coil and the pot position has different power settings. For example, the evaluation device will output a signal if, in a shared induction coil, a pot position is used for searing and the other pot position is used for simmering. Then the control levels of the two pot positions differ significantly, so that the shared induction coil can not be operated with optimal setting at least one pot position. Then the user is signaled that he can improve the positioning of the pot positions on the hob.

In advantageous embodiments, the evaluation device compares the pot positions of at least one first time with the pot positions of at least one second time. Such an approach can be used in particular and preferably for the detection of cooking vessels. If a large pot position detected by the evaluation, it may not be reliable to determine whether it is a large or two smaller pots. If the user changes the pot position of at least one pot caused by a signal, the evaluation device can draw conclusions as to whether one or two cooking vessels are set up when comparing the first and second time points.

Preferably, the signaling device comprises at least one optical and / or one acoustic output device, wherein a signal tone and / or an optical signal is output when the minimum distance between at least two pot positions is exceeded. In particular, only a few or even just one beep can be output. In an optical output device, a simple flashing light is preferably provided, for example as an LED. Overall, preferably a very simple signal output is preferred.

It is also preferred that the pot positions are determined by means of at least one inductive, acoustic, optical and / or capacitive sensor. Furthermore, it is preferred that additionally or exclusively a sound and / or vibration emitting and / or receiving sensor is used. In this way, the pot positions can be determined reliably on the hob.

Particularly preferably, the minimum distance between at least two pot positions is determined by means of at least one inductive, acoustic, optical and / or capacitive sensor. Again, additionally or exclusively, a sound and / or vibration emitting and / or receiving sensor can be used to check two pot positions with respect to a minimum distance.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

Figur 1

eine reinschematische Darstellung einer erfindungsgemäßen Kochfeldeinrichtung in einer Küchenzeile in einer perspektivischen Ansicht;

Figur 2

eine rein schematische Darstellung auf eine erfindungsgemäße Kochfeldeinrichtung zu einem ersten Zeitpunkt in einer Ansicht von oben;

Figur 3

eine rein schematische Darstellung der Kochfeldeinrichtung gemäß Figur 2 zu einem zweiten Zeitpunkt;

Figur 4

eine rein schematische Darstellung einer anderen Ausführungsform einer erfindungsgemäßen Kochfeldeinrichtung in einer Ansicht von oben; und

Figur 5

eine weitere Ausführungsform einer erfindungsgemäßen Kochfeldeinrichtung in einer rein schematischen Darstellung von oben.

In the figures show:

FIG. 1

a purely schematic representation of a cooking field device according to the invention in a kitchenette in a perspective view;

FIG. 2

a purely schematic representation of a cooking field device according to the invention at a first time in a view from above;

FIG. 3

a purely schematic representation of the cooking field according to FIG. 2 at a second time;

FIG. 4

a purely schematic representation of another embodiment of a cooking field device according to the invention in a view from above; and

FIG. 5

a further embodiment of a cooking field device according to the invention in a purely schematic representation from above.

In FIG. 1 is purely schematically a cooking field device 1 according to the invention in a kitchenette 100 integrated shown in a perspective view. The cooking field device comprises a hob 2, on which a pot 101 is placed in FIG.

To operate the hob 2, the cooking field device in the embodiment shown here comprises an operating device 27, which has a plurality of operating elements 28. In other embodiments, the cooking field device may also be provided without its own operating device 27. In such an embodiment, the operation of the hob 2 can then be done for example via the control panel 103 of another cooking appliance 102, which is provided together with the cooking field device 1 in the kitchen unit 100. Then, controls 104 may be provided on the control panel 103 of the cooking appliance 102, which serve to control the hob 2.

In FIG. 2 a cooking field device 1 according to the invention is shown purely schematically from above. In this case, the cooking field device 1 comprises a hob 2, which has a plurality of induction coils 3. The induction coils 3 are substantially uniform over the Hob 2 is distributed and arranged in rows and columns. The cooking field device 1 is also associated with a detection device 4, which in the exemplary embodiment shown here comprises an evaluation device 5 and a signal device 6.

The evaluation device 5 is suitable and designed to determine pots 101 set up on the hob and their pot positions 7, 8. In this case, the evaluation device 5 detects the pot positions 7, 8 on the hob 2 and also determines whether the pot positions 7, 8 are arranged to each other such that a minimum distance 13 between the pot positions 7, 8 is exceeded.

To detect the pot positions 7, 8, distributed over the hob 2 sensor devices 14 are arranged, wherein in FIG. 2 only two sensors 15 are indicated purely by way of example between the induction coils 3. Such a sensor 15 may be formed as an inductive sensor 16, as an acoustic sensor 17, as an optical sensor 18 or as a capacitive sensor 19. In addition, it is also possible that the sensor is designed as a sound and / or vibration emitting and / or received sensor.

It can be reliably detected via the sensors 15 of the sensor devices 14 whether and where a pot is placed on the hob 2. The pot positions 7, 8 thus determined are communicated with each other and it is checked whether a predetermined minimum distance 13 between the pot positions 7, 8 is exceeded.

In accordance with the invention, a minimum distance 13 is understood in particular to mean a specific distance between the pot positions. In the embodiment shown here, however, is checked by the evaluation device 5, whether the distance between the pot positions 7, 8 is chosen so far apart that the pot positions 7, 8 do not use common induction coils 3. A sufficient distance between the pot positions would be in the in FIG. 2 embodiment shown, inter alia, the case when the pot position 7 would be provided on one of the pot positions symbolized by the dashed circles. Then a minimum distance would not fall below.

In FIG. 2 In contrast, the pot positions 7, 8 are provided so close to each other that the induction coil 3.1 is used both from the pot position 7 and from the pot position 8.

When evaluating the pot positions 7, 8, the evaluation device 5 comes to the result that the minimum distance 13 between the pot positions 7, 8 has fallen below and outputs a signal 12 on the signal device 6. By this signal 12, the user is advised that the choice of pot positions 7, 8 can be improved. Whether the user is the Pot position 7, 8 changed, he can decide freely. He is not given or suggested that or where he must change the pot positions 7, 8.

In the exemplary embodiment shown here, the signal device 6 comprises an acoustic output device 22, which is made available by a small loudspeaker 29. The evaluation device 5 has recognized that the two pot positions 7, 8 use a common induction coil 3.1, so that the signal device 6 outputs a signal 12, which is designed here as a warning sound 30.

In FIG. 3 is the same embodiment as in FIG. 2 displayed. Here, too, various sensors 15 of sensor devices 14 on and between some induction coils 3 are shown purely schematically. In the exemplary embodiment shown here, it can be seen that the sensors 15 can be provided both in or on the induction coils 3 or between a plurality of induction coils.

In the state shown here, the user has responded to the signal 12 and changed the pot position 7. In this case, the user 7 has reacted to the signal tone 12 in such a way that he has brought about a maximum distance between the two pot positions 7, 8. Such a procedure is preferred and it can be deposited for example in a manual that a user should establish a maximum distance between pot positions when the detection device 4 determines a conflict between two pot positions 7, 8. By establishing the maximum possible distance between the pot positions 7, 8 is achieved in a simple manner that two pot positions 7, 8, which were provided too close to each other, can be pulled apart in any case in a single attempt optimally.

The evaluation device 5 of the recognition device 4 is in the in the FIGS. 2 and 3 shown embodiment also suitable and oriented to dissolve, whether a large pot position 7, 8 consists of a single cooking vessel or several cooking vessels. For this purpose, the pot positions 7, 8 are compared in a first time 25 with the pot positions 7, 8 of a second time 26. If a user has caused a signal 12 to change at least one pot position 7, 8, it will be possible at a second time 26 to determine uniquely by the evaluation device 5 whether one or more pot positions 7, 8 are present on the hob 2.

In FIG. 4 a further embodiment of a cooking field device 1 according to the invention is shown purely schematically in a plan view. Here, the cooking field device 1 comprises a hob 2 with a plurality of induction coils 3. Again, the induction coils 3 are substantially uniformly distributed in rows and columns on the hob 2.

On the hob 2 according to FIG. 4 four pot positions 7, 8, 9, 10 are present, the pot positions 7, 8 and the pot positions 9, 10 are arranged so close to each other that a predetermined minimum distance between these pot positions 7, 8 and 9, 10 is exceeded. This also results in this embodiment from the fact that the evaluation detects the pot positions 7, 8, 9, 10 associated induction coils 3. For this purpose, sensors 15 are used, wherein in FIG. 4 purely schematically and by way of example on a few induction coils sensor devices 14 are indicated with sensors 15.

In the evaluation, it is then determined that the pot position 7 and 8 use a common induction coil 3.1. The pot positions 9, 10 use a common induction coil 3.2. Since by using a common induction coil 3.1, 3.2 of several pot positions 7, 8; 9, 10 the cooking field device 1 may not be optimally operated under certain circumstances, a corresponding message is issued to the user via a signaling device 6.

The signal device 6 is formed in the embodiment shown here as an optical output device 21. In this case, the optical output device 21 can be provided in a simple embodiment, for example, by a lighting element such as an LED available.

In the in FIG. 4 In the embodiment shown, the optical output device 21 is provided by a light strip 31. The light strip 31 is designed such that a user across the width 32 of the hob 2 is at least approximately indicated, which pot positions 7, 8, 9, 10 are provided too close to each other.

At a corresponding position, a signal 12 is output on the optical output device 21. Thus, a user can easily recognize the signal device 6, where on the hob 2, the pot position 7, 8, 9, 10 can be provided optimally.

Especially with larger cooktops 2, such a configuration may be advantageous. Thus, a user can be informed relatively accurately about the positions of the problematic pot positions 7, 8, 9, 10, even if a plurality of pots on the hob 2 is provided.

In FIG. 5 a further embodiment of a cooking field device 1 according to the invention is shown in a plan view. The cooking field device 1 comprises a hob 2 with a plurality of induction coils 3, which are distributed substantially uniformly in rows and columns over the hob 2. Here again, purely schematically on only a few induction coils 3 sensor devices 14 with sensors 15 are indicated.

On the hob 2 five pot positions 7, 8, 9, 10, 11 are provided, wherein the cooking vessels of the pot positions 7, 8 and the positions 10, 11 are provided too close to each other. Again, the falling below a minimum distance between the pot positions 7, 8; 10, 11 is not determined by falling below a specific distance, but by the fact that the evaluation device 5 of the detection device 4 detects the pot positions 7, 8, 9, 10, 11 associated induction coils 3. In the pot positions 7 and 8 and in the pot positions 10 and 11, the evaluation device 5 recognizes that in each case a common induction coil 3.1, 3.2 is used by the pot positions 7, 8, 10, 11.

The signaling device 6 is embodied in the embodiment shown here as an optical output device 21 and is provided by a display 33. On this display 33, the pot positions 7, 8, 9, 10, 11 recognized by the evaluation device 5 are indicated purely schematically by symbols 34. In this case, the symbols 34 of the pot positions 7, 8, 10, 11, which are too close to each other, are visually highlighted. This is shown here purely schematically by a small circle in the middle of the symbols 34. Such highlighting can be achieved by flashing or z. B. also be done by a color highlighting.

Optionally, in such an embodiment, a user can also be made a proposal in which direction the pot positions 8, 10 should be moved, so that a minimum distance between the pot positions 7, 8, 9, 10, 11 is no longer undershot. This is indicated purely schematically by the dashed arrows in the display 33.

In the embodiment shown here evaluates the evaluation device 5 also the power setting 23 of the pot positions 7, 8, 9, 10, 11 to determine whether a minimum distance between the pot positions 7, 8, 9, 10, 11 is exceeded.

For this purpose, the evaluation device 5 analyzes whether the power settings 23 of the affected pot positions 7, 8; 10, 11 differ in at least a minimum size 24. In this case, the evaluation device 5 takes into account the control stage 35 of the critical pot positions 7, 8 in the exemplary embodiment shown here; 10, 11. The control stage 35 indicates the power with which the induction coils 3 of the corresponding pot positions 7, 8, 9, 10, 11 are operated.

The pot positions 7 and 8 and the pot positions 10 and 11 use a common induction coil 3.1, 3.2. However, the common use of the induction coils 3.1, 3.2 is usually only a problem if the pot positions 7 and 8 or 10 and 11 to be operated with different powers. This may be the case if z. B. on the pot position 8 a roasting dish stands up, in which a piece of meat is to be seared sharp.

If there is a cooking vessel on the pot position 7, in which vegetables should be simmered only slightly, the power settings 24 of the pot positions 7 and 8 are very different. Thus, the shared induction coil 3.1 can not be set optimally for both pot positions 7, 8. In such a case, the evaluation device 5 via the signaling device 6, a signal 12, which should entice the user to the pot positions 7, 8, 9, 10, 11 as far as possible to pull apart, so that a minimum distance between the pot positions 7, 8, 9 , 10, 11 is not undershot.

LIST OF REFERENCE NUMBERS

1

Hob unit

2

hob

3

induction coil

3.1

induction coil

3.2

induction coil

4

recognizer

5

evaluation

6

signaling device

7

pot position

8th

pot position

9

pot position

10

pot position

11

pot position

12

signal

13

minimum distance

14

sensor device

15

sensor

16

inductive sensor

17

acoustic sensor

18

optical sensor

19

capacitive sensor

20

Sound or vibration sensor

21

optical output device

22

acoustic output device

23

power position

24

minimum size

25

first time

26

second time

27

operating device

28

operating element

29

speaker

30

warning

31

light strip

32

Wide hob

33

display

34

symbol

35

control stage

100

kitchenette

101

pot

102

Cooking appliance

103

control panel

104

operating element

Claims (15)

Cooking field device (1) with at least one hob (2), which comprises a plurality of induction coils (3), which are distributed substantially uniformly over the hob (2), wherein at least one detection device (4) is provided, the at least one evaluation device (5) and at least one signaling device (6),
characterized,
in that the evaluation device (5) is suitable and designed to recognize pot positions (7, 8, 9, 10, 11) on the hob (2) and to output a signal (12) via the signal device (6) if at least one predetermined one Minimum distance (13) between at least two pot positions (7, 8, 9, 10, 11) is exceeded. Cooking field device (1) according to claim 1, characterized in that the evaluation device (5) is suitable and designed to - To recognize the pot positions (7, 8, 9, 10, 11) associated induction coils (3) on the hob (2) and - To evaluate the power setting (23) of the pot positions (7, 8, 9, 10, 11) and - output a signal (12) via the signal device (6) if at least one induction coil (3.1, 3.2) is assigned two pot positions (7, 8, 9, 10, 11) whose power setting (23) is at least one predetermined minimum size ( 24) are chosen differently. Cooking field device (1) according to one of the preceding claims, characterized in that the evaluation device (5) comprises at least one sensor device (14) which is provided between at least two induction coils (3) and / or at least one passive sensor (15). Cooking field device (1) according to the preceding claim, characterized in that the sensor (15) at least one inductive (16), acoustic (17), optical (18) and / or capacitive sensor (19) and / or a sound and / or Vibrating and / or receiving sensor (20) is. Cooking field device (1) according to one of the preceding claims, characterized in that the signal device (6) comprises at least one optical (21) and / or at least one acoustic output device (22). Method for operating a cooking field device (1) with at least one hob (2), which comprises a plurality of induction coils (3) which essentially are arranged uniformly over the hob (2), wherein at least one detection device (4) is provided which comprises at least one evaluation device (5) and at least one signal device (6),
characterized,
in that the evaluation device (5) recognizes pot positions (7, 8, 9, 10, 11) on the hob (2) and outputs a signal (12) via the signal device (6) if at least one predetermined minimum distance (13) between at least two Pot positions (7, 8, 9, 10, 11) is fallen below. Method according to the preceding claim 6, characterized in that the evaluation device (5) detects the pot positions (7, 8, 9, 10, 11) associated induction coils (3) on the hob (2) and via the signal device (6) Signal (12) outputs when at least one induction coil (3.1, 3.2) two pot positions (7, 8, 9, 10, 11) is assigned. Method according to one of the preceding claims 6 and 7, characterized in that the evaluation device (5) detects pot positions (7, 8, 9, 10, 11) on the hob (2) and via the signal device (6) a signal (12) outputs when two pot positions (7, 8, 9, 10, 11) are associated with at least one common induction coil (3) and different power settings (23) for the two pot positions (7, 8, 9, 10, 11) are selected. 10.11. Method according to one of the preceding claims 6 to 8, characterized in that the evaluation device (5) evaluates the power setting (23) of the pot positions (7, 8, 9, 10, 11) and only via the signal device (6) a signal (12 ) outputs when the power setting (23) of the pot positions (7, 8, 9, 10, 11) differs in at least one predetermined minimum size (24). Method according to one of the preceding claims 6 to 9, characterized in that the signal (12) is a simple signal, which in particular hinwiest the user only to a state without pretending to these rules of action. Method according to one of the preceding claims 6 to 10, characterized in that the falling below a minimum distance (13) by the evaluation device (5) only as critically evaluated when two pot positions (7, 8, 9, 10, 11) an induction coil ( 3) and the pot positions (7, 8, 9, 10, 11) have different power settings. Method according to one of the preceding claims 6 to 11, characterized in that the evaluation device (5) the pot positions (7, 8, 9, 10, 11) of at least one first time (25) with the pot positions (7, 8, 9, 10 , 11) compares at least one second time (26). Method according to one of the preceding claims 6 to 12, characterized in that the signal device (6) comprises at least one optical (21) and / or an acoustic output device (22) and that a signal tone and / or an optical signal is output when the Minimum distance (13) between at least two pot positions (7, 8, 9, 10, 11) is exceeded. Method according to one of the preceding claims 6 to 13, characterized in that the pot positions (7, 8, 9, 10, 11) by means of at least one inductive (16), acoustic (17), optical (18) and / or capacitive sensor ( 19) and / or by means of a sound and / or vibrations emitting and / or receiving sensor (20) are determined. Method according to one of the preceding claims 6 to 14, characterized in that the minimum distance (13) between at least two pot positions (7, 8, 9, 10, 11) by means of at least one inductive (16), acoustic (17), optical (18 ) and / or capacitive sensor (19) and / or by means of a sound and / or vibration emitting and / or receiving sensor (20) is determined.

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