EP3738408B1 - Hob apparatus - Google Patents

Description

The invention relates to a hob device according to the preamble of claim 1 and a method for operating a hob device according to the preamble of claim 12.

A hob device with a large number of heating units which define a variable cooking surface area is already known from the prior art. First heating units of the heating units define a first cooking surface portion of the variable cooking surface area and second heating units of the heating units define a second cooking surface portion of the variable cooking surface area that is different from the first cooking surface portion. In an operating state in which at least part of a cooking utensil is set up in the cooking surface areas, a control unit of the hob device heats the cooking utensils set up with a target heating power intended for the corresponding cooking utensil. Depending on the cooking utensil configuration, the total output power of the heating units can fluctuate, which can cause flickering.

EP 2 931 005 discloses a hob device according to the preamble of claim 1.

The object of the invention is, in particular, to provide a generic device with improved properties with regard to heating cooking utensils. The object is achieved according to the invention by the features of claims 1 and 12, while advantageous refinements and developments of the invention can be found in the subclaims.

The invention is based on a hob device, in particular an induction hob device, with a plurality of heating units which define at least one variable cooking surface area, which has at least one fixedly defined first cooking surface part area and at least one fixedly defined second cooking surface part area and in particular at least one fixedly defined third cooking surface part area.

The hob device has at least one control unit, which, in at least one operating state, in which at least one piece of cooking utensils is set up in the cooking surface sub-areas, generates a total output power from the first heating units defining the first cooking surface sub-area of the heating units and a total output power from the second heating units of the heating units defining the second cooking surface section at any particular time is kept at least essentially constant, in particular in order to thereby minimize the occurrence of flicker.

With such a configuration, optimal heating of cooking utensils can be achieved, in particular while avoiding the occurrence of flicker. In this way, in particular, an impression of a defective hob for an operator can be avoided, which in particular enables a high level of operating comfort. In particular, each cooking utensil can be supplied with at least essentially a target heating power requested for the cooking utensil and, in particular, at the same time a total output power can be kept constant at all times. In particular, a large number of cooking utensils can be heated at a target heating power, particularly at the same time and advantageously, while avoiding the occurrence of flicker. By dividing the cooking utensils into the cooking surface areas, a low level of complexity can be made possible, in particular in the calculation of output powers and/or time intervals by the control unit, which ensures in particular a high level of functionality and/or rapid processing of operating inputs and thus in particular a high ease of use can be achieved. In particular, regulations regarding flicker can be complied with, particularly in a relatively simple and/or uncomplicated manner.

A “hob device”, in particular an “induction hob device”, should be understood to mean in particular at least a part, in particular a subassembly, of a hob, in particular an induction hob. The hob device in particular has at least one mounting plate, below which the heating units are arranged in particular in at least one installation position.

A “set-up plate” is intended to mean in particular at least one, in particular plate-like unit, which is intended for setting up at least one cooking utensil and/or for placing at least one item to be cooked for the purpose of heating. The mounting plate could, for example, be designed as a partial area of at least one worktop, in particular at least one kitchen worktop, in particular at least one cooking system having the hob device. Alternatively or additionally, the mounting plate could be designed as a hob plate. The set-up plate designed as a hob plate could in particular be at least part of a Form the hob outer housing and in particular together with at least one outer housing unit, with which the set-up plate designed as a hob plate could be connected in particular in at least one assembled state, form at least a large part of the hob outer housing. The support plate could, for example, be made at least largely of glass and/or of glass ceramic and/or of Neolith and/or of Dekton and/or of wood and/or of marble and/or of stone, in particular of natural stone, and/or of laminate and/or made of metal and/or made of plastic and/or made of ceramic. “At least to a large extent” should be understood to mean in particular a proportion, in particular a mass proportion and/or volume proportion, of at least 70%, in particular of at least 80%, advantageously of at least 90% and preferably of at least 95%.

In this context, a “heating unit” is intended to mean, in particular, a unit which is intended to supply energy to at least one cooking utensil in at least one operating state for the purpose of heating the cooking utensil. For example, the heating unit could be designed as a resistance heating unit and in particular be intended to convert energy into heat and supply this to the cooking utensil for the purpose of heating the cooking utensil. Alternatively or additionally, the heating unit could be designed as an induction heating unit and in particular be intended to supply energy in the form of an alternating electromagnetic field to the cooking utensil, wherein the energy supplied to the cooking utensil could be converted into heat, in particular in the cooking utensil. In at least one operating state, the heating units are arranged in particular below the variable cooking surface area and/or the mounting plate and are advantageously arranged in a close area of the variable cooking surface area and/or the mounting plate.

In particular, the heating unit could in particular have exactly one heating element, which could in particular be defined by exactly one line element, which could be provided in at least one operating state, in particular for conducting electrical current, in particular for providing heating energy. Alternatively, the heating unit could have at least two, in particular at least three, advantageously at least five and preferably several heating elements, which in particular could each have exactly one line element. The heating unit could in particular have a group of heating elements.

A “variable” cooking surface area is intended to mean, in particular, a cooking surface area which is intended for placing cooking utensils at any desired position for the purpose of heating. For example, the variable cooking surface area could be at least a partial surface area of the set-up plate, in particular a partial surface area of the set-up plate that faces an operator in at least one operating state. In at least one operating state, the heating units in particular are arranged below the variable cooking surface area. In at least one operating state, the control unit forms at least one heating zone from at least some of the heating units, which is adapted in particular to at least one set-up cooking utensil, in particular to a size and / or shape of at least one set-up cooking utensil. In particular, the variable cooking surface area differs from a cooking surface area in which cooking zones are fixed, in particular by markings on the cooking surface area. The heating units defining the variable cooking surface area could, for example, be arranged in the form of a matrix. Alternatively or additionally, the heating units defining the variable cooking surface area could, for example, be movably mounted at least partially, in particular at least substantially parallel to a main extension plane of the mounting plate, and in particular be designed as movable heating units.

A “main extension plane” of an object is to be understood in particular as a plane which is parallel to a largest side surface of a smallest imaginary geometric cuboid, which just completely encloses the object, and in particular runs through the center of the cuboid. “Substantially parallel” is to be understood here in particular as an alignment of a direction relative to a reference direction, in particular in a plane, with the direction having a deviation from the reference direction of in particular a maximum of 8°, advantageously a maximum of 5° and particularly advantageously a maximum of 2° having.

A “firmly defined” cooking surface sub-area is to be understood in particular as a cooking surface sub-area, the position of which is determined by at least one property, for example by at least one structural and/or electrical and/or spatial property, and/or by at least one marking, in particular in any operating state. is fixed and/or predetermined invariably and/or independently of a heating zone configuration and/or of a cooking utensil configuration. For example A firmly defined cooking surface subarea could be fixed unchangeably and/or constantly by at least one connection of heating units defining the cooking surface subregion to a common mains voltage phase and/or by a spatial arrangement of heating units defining the cooking surface subregion.

At least some of the heating units define the first cooking surface area and are referred to below as first heating units. At least some of the heating units define the second cooking surface area and are referred to below as second heating units.

The variable cooking surface area could, for example, have a number of n cooking surface subareas, where n could in particular be an integer real number greater than two. In particular, at least one piece of cooking utensils could be set up in each of the n cooking surface areas in at least one operating state. In particular, in the operating state in which at least one part of a cooking utensil is set up in the particular n cooking surface subareas, the control unit could keep a respective total output power of respective heating units of the heating units defining the corresponding cooking surface subarea at least essentially constant at all times. This makes it possible in particular to expand two mains voltage phases to a higher number of mains voltage phases and/or to extend to a large number of cooking utensils, at least a part of which is arranged in a cooking surface sub-area and at least a part in a further cooking surface sub-area.

A “control unit” is to be understood in particular as an electronic unit which is preferably at least partially integrated into a control and/or regulating unit of a hob and which is preferably intended to control and/or regulate at least the heating units. Preferably, the control unit comprises a computing unit and in particular, in addition to the computing unit, a storage unit with a control and/or regulation program stored therein, which is intended to be executed by the computing unit.

The expression that “at least one part of a cooking utensil” is set up in the cooking surface sub-areas is intended to mean in particular that in one of the cooking surface sub-areas there is at least one part of a cooking utensil and in another At least part of a cooking utensil is set up in the cooking surface areas. For example, at least one part of a cooking utensil could be placed in one of the cooking surface subareas and at least another part of the cooking utensil could be placed in the other of the cooking surface subareas. Alternatively or additionally, at least one cooking utensil, in particular completely, could be set up in one of the cooking surface subareas and at least one further cooking utensil, different from the one cooking utensil, in particular completely, could be set up in the other of the cooking surface subareas.

A “total output power” of heating units defining a cooking surface area is to be understood as a sum of the output powers of all heating units defining the cooking surface area at a specific point in time, in particular a period. An “output power” of one of the heating units is to be understood in particular as an electrical power which the heating unit transmits in at least one operating state to at least one set-up cooking utensil and/or which the heating unit in at least one operating state serves to heat at least one heating zone and/or at least one cooking utensils. For example, the output power could be characterized by at least one electrical current. In at least one operating state, the heating unit could, for example, convert the output power in at least one line element of the heating unit at least partially, advantageously at least to a large extent and preferably completely into a heat flow and provide the heat flow in particular for heating at least one heating zone and/or at least one cooking utensil. Alternatively or additionally, the heating unit could, in particular in at least one operating state, in particular by means of the electrical current, provide a particularly high-frequency electromagnetic alternating field, which could be converted into heat, in particular in a cooking utensil.

The total output power differs in particular from an average output power. An “average output power” of a heating unit should be understood to mean, in particular, an output power of the heating unit that is averaged over time, in particular over at least one time interval. The average output power of the heating unit is in particular a quotient of a sum of all output powers of the heating unit within the time interval and the time interval. For example, the time interval could be at least a large part of a period and advantageously an entire period. Preferably, the control unit sets the middle one in at least one operating state Output power, in particular for each heating zone individually, advantageously by controlling the heating units that heat the heating zone, such that the average output power corresponds to a target heating power specified, in particular for the heating zone. In at least one operating state, the control unit adapts in particular a heating power supplied to at least one heating zone to a target heating power specified for the heating zone, in particular at any time. The target heating output could, for example, be predetermined by an operator, in particular by at least one operating input using at least one operator interface, and/or by a cooking program, which could in particular be stored in the memory unit of the control unit. Particularly advantageously, the control unit heats cooking utensils set up in the operating state and/or at least one heating zone provided for the cooking utensils with at least one target heating power intended for the cooking utensils.

The expression that the control unit in at least one operating state keeps a total output power "at least substantially constant" at any time is intended to mean that the control unit in the operating state maintains a total output power at any time and a further total output power at any further time, which is in particular different from the point in time, sets such that a quotient of a smaller of the total output powers and a larger of the total output powers is at least 0.9, in particular at least 0.95, advantageously at least 0.97, particularly advantageously at least 0.98, preferably at least 0.99 and particularly preferably at least 0.995.

In particular, in the case that it is possible to keep the total output power of the heating units defining the cooking surface subareas constant while simultaneously heating the cooking utensil with a target heating power specified for the cooking utensil, the quotient of the smaller of the total output powers and the larger of the total output powers is at least 0.97, particularly advantageously at least 0.98, preferably at least 0.99 and particularly preferably at least 0.995. In particular, in the event that it is impossible to keep the total output power of the heating units defining the cooking surface subareas constant while simultaneously heating the cooking utensils with a target heating power specified for the cooking utensil, the quotient of the smaller of the total output powers and the larger of the total output powers is at least 0.9, in particular at least 0 .92, advantageous at least 0.93, particularly advantageously at least 0.94, preferably at least 0.95 and particularly preferably at least 0.97.

A total output power difference between the total output power at the particularly arbitrary point in time and the further total output power at the particularly arbitrary further point in time is in particular at least essentially zero. In particular, a total output power difference between two total output powers at two different, in particular arbitrary times, in particular a period duration, is at least essentially zero. A “total output power difference” is intended to mean, in particular, a difference in the total output power at two different points in time.

For example, a total output power of the first heating units and a total output power of the second heating units could be at least substantially and advantageously completely identical. In particular, a total output power of the first heating units and a total output power of the second heating units differ. This allows, in particular, a flexible adjustment of the total output power of the heating units, whereby set-up cooking utensils can be heated particularly flexibly and advantageously with a predetermined target heating output.

In the operating state, the control unit could in particular adjust at least one output power of at least one of the heating units, advantageously at least a large part of the output power of the heating units and preferably all output power of the heating units by means of a frequency. Alternatively or additionally, in the operating state, the control unit could in particular adjust at least one output power of at least one of the heating units, advantageously at least a large part of the output powers of the heating units and preferably all output powers of the heating units by means of a duty cycle.

“Flicker” is intended to be understood in particular as a subjective impression of instability in a visual perception, which is caused in particular by a light stimulus whose luminance or spectral distribution fluctuates over time. In particular, flicker can be caused by a voltage drop in the mains voltage.

The term “intended” is intended to mean, in particular, specifically programmed, designed and/or equipped. Including that an object is intended for a specific function is, it should be understood in particular that the object fulfills and/or carries out this specific function in at least one application and/or operating state.

For example, in the operating state, at least a large part of and advantageously each of the first heating units could be connected to a first mains voltage phase and at least a large part of and advantageously each of the second heating units could be connected to the same first mains voltage phase. Preferably, in the operating state, at least a majority of and advantageously each of the first heating units are connected to a first mains voltage phase and at least a large part of and advantageously each of the second heating units are connected to a second mains voltage phase which is different from the first mains voltage phase. In particular, the first heating units are connected to the first mains voltage phase in the operating state. In particular, the second heating units are connected to the second mains voltage phase in the operating state. A “mains voltage phase” should be understood to mean in particular a phase of a household network, in particular exactly one phase of a household network. The first mains current voltage phase and the second mains current voltage phase could in particular be phase-shifted, in particular at a phase angle of at least substantially 120°. “At least a majority” should be understood to mean in particular a proportion, in particular a mass proportion and/or volume proportion and/or number proportion, of at least 70%, in particular of at least 80%, advantageously of at least 90% and preferably of at least 95%. This means that a large number of cooking utensils can be heated, in particular at the same time. In particular, a total output power per mains voltage phase can be limited, which in particular enables low complexity, in particular in a calculation of output powers and/or time intervals by the control unit. Particularly advantageously, a total output power of heating units, which in the operating state are connected to a particularly single common mains voltage phase, can be kept at least essentially constant, whereby in particular predetermined standards with regard to flicker can be adhered to.

In addition, it is proposed that the first total output power, which is in particular a total output power provided by the first heating units, in the operating state a maximum of one value of one of the first mains voltage phase maximum power provided. In particular, the second total output power, which is in particular a total output power provided by the second heating units, in the operating state assumes a maximum value of a maximum power provided by the second mains voltage phase. A “maximum power provided by a mains voltage phase” is intended to mean, in particular, a power which can be tapped and/or requested at most from the mains voltage phase in at least one operating state, in particular independently of a heating zone configuration and/or of the cooking utensils set up. Particularly in Europe and advantageously in Germany, the maximum power provided by a mains voltage phase could, for example, assume a maximum value of 3600 W, in particular per mains voltage phase. In the operating state, the control unit operates the first heating units and the second heating units independently of one another. In the operating state, the control unit avoids in particular a boost mode and/or an assignment of at least two mains voltage phases to at least one of the heating units. In this way, overloading of the heating units can be avoided, which means that a long-lasting design can be achieved. In particular, a small number of possible different heating powers per heating unit can be achieved, in particular in comparison to a higher maximum power provided by the first mains voltage phase, which in particular enables simple calculability and/or a simple control algorithm.

In the operating state, for example, a cooking utensil could be set up in the first cooking surface sub-area and another cooking utensil that is different from the cooking utensil could be set up in the second cooking surface sub-area. Alternatively or additionally, at least a large part of and advantageously each of the cooking utensils could in particular be set up at least to a large extent and advantageously completely in one of the cooking surface areas. Preferably, in the operating state, at least a first cooking utensil sub-area of the cooking utensil is set up in the first cooking surface sub-area and at least a second cooking utensil sub-area of the particular same cooking utensil is set up in the second cooking surface sub-area. In particular, a particular cooking utensil is partially set up in the first cooking surface sub-area and in particular at the same time partially in the second cooking surface sub-area. This allows you to a cooking utensil, which is partially placed on each of the cooking surface areas, can in particular be optimally heated.

In the operating state, the control unit could operate the first heating units that heat the first cooking utensil sub-area and the second heating units heating the second cooking utensil sub-area at least in sections at the same time. In particular, in the operating state, in particular in the case that the control unit in the operating state operates the first heating units that heat the first cooking utensil sub-area and the second heating units heating the second cooking utensil sub-area at least in sections at the same time, the first heating units and the second heating units with the same frequency and / or operate with frequencies different by at least 17 kHz, in particular by at least 18 kHz, advantageously by at least 19 kHz and preferably by at least 20 kHz, in order to avoid intermodulation hum in particular. Preferably, in the operating state, the control unit operates the first heating units that heat the first cooking utensil sub-area and the second heating units heating the second cooking utensil sub-area without overlapping in time. In particular, in the operating state, the control unit first operates the first heating units that heat the first cooking utensil sub-area and in particular then the second heating units heating the second cooking utensil sub-area. Alternatively or additionally, in the operating state, the control unit could first operate the second heating units that heat the second cooking utensil sub-area and in particular then operate the first heating units heating the first cooking utensil sub-area. In the operating state, the control unit avoids, in particular, at least partially simultaneous operation of the first heating units heating the first cooking utensil sub-area and the second heating units heating the second cooking utensil sub-area, in particular in the case that it is possible to avoid intermodulation hum while at the same time keeping the total output power of the heating units defining the cooking surface sub-areas constant is. As a result, intermodulation hum can be avoided particularly reliably, whereby a high level of operating comfort can be achieved.

In addition, it is proposed that in the operating state a sum of an activation duration of the first heating units heating the first cooking utensil sub-area and an activation duration of the second heating units heating the second cooking utensil sub-area corresponds to a maximum of one period. A sum is particularly advantageous an activation duration of the first heating units heating the first cooking utensil sub-area and an activation duration of the second heating units heating the second cooking utensil sub-area is less than a period. This makes possible, in particular, overlap-free operation of the first heating units that heat the first cooking utensil sub-area and the second heating units heating the second cooking utensil sub-area, whereby intermodulation hum can be avoided in particular efficiently.

The variable cooking surface area could, for example, exclusively have the first cooking surface partial area and the second cooking surface partial area. Preferably, the variable cooking surface area has at least one fixedly defined third cooking surface subarea, in which at least a third cooking utensil subarea of the particular same cooking utensil is set up in the operating state. This allows, in particular, optimized and/or efficient heating of the cooking utensils.

Furthermore, it is proposed that in the operating state at least a large part of the third heating units of the heating units defining the third cooking surface area is connected to a third mains voltage phase. At least some of the heating units define the third cooking surface area and are referred to below as third heating units. In particular, the third heating units are connected to the third mains voltage phase in the operating state. This makes it possible in particular to heat the cooking utensils particularly quickly and/or to heat the cooking utensils with a high heating output.

In addition, it is proposed that the control unit operates the first heating units and the second heating units in the operating state while avoiding intermodulation hum. For example, to avoid intermodulation hum, the control unit could operate the first heating units and the second heating units in the operating state without overlapping in time. Alternatively or additionally, in the operating state to avoid intermodulation hum, the control unit could operate the first heating units and the second heating units with an at least substantially the same frequency. In the operating state to avoid intermodulation hum, the control unit could operate the first heating units and the second heating units with frequencies different by at least 17 kHz. In this way, a high level of operating comfort and/or low-noise, preferably silent heating of cooking utensils can be achieved.

For example, the control unit could be provided, in the event that it is impossible to avoid intermodulation hum while simultaneously keeping the total output power of the heating units defining the cooking surface subareas constant, to prioritize keeping the total output power of the heating units defining the cooking surface subareas constant and in particular to accept the occurrence of intermodulation humming. Preferably, the control unit is intended to prioritize the avoidance of intermodulation hum while simultaneously keeping the total output power of the heating units defining the cooking surface subareas constant. In particular, in the operating state in which it is possible, in particular, to avoid intermodulation hum while simultaneously keeping the total output power of the heating units defining the cooking surface subareas constant, the control unit keeps the total output power of the heating units defining the cooking surface subareas at least substantially constant while at the same time avoiding intermodulation humming. The control unit avoids the occurrence of intermodulation hum in particular in at least one further operating state, in which in particular it is impossible to avoid intermodulation hum while at the same time keeping the total output power of the heating units defining the cooking surface subareas constant, and in particular accepts minimal fluctuations in the total output power of the heating units defining the cooking surface subareas. These fluctuations are arranged in a range which is contained by the phrase “at least substantially constant”. As a result, the occurrence of intermodulation hum can be prevented at any particular time, whereby in particular a low-noise and/or comfortable operation of a hob having the hob device can be achieved.

Furthermore, it is proposed that the control unit operates the first heating units and the second heating units in the operating state while avoiding the occurrence of flicker. To avoid the occurrence of flicker, the control unit keeps the total output power of the first heating units and the total output power of the second heating units at least substantially constant in the operating state. In this way, a high level of operating comfort can be provided and/or the occurrence of flicker can be efficiently avoided.

For example, the control unit could be intended to prevent the occurrence of flicker and/or keeping the total output power of the heating units defining the cooking surface subareas constant while simultaneously heating the cooking utensils with a target heating power specified for the cooking utensils Flicker and / or keeping the total output power of the heating units defining the cooking surface areas constant. Preferably, the control unit is intended to, in the event that it is impossible to avoid the occurrence of flicker and/or keep the total output power of the heating units defining the cooking surface subareas constant while simultaneously heating the cooking utensil with a target heating power specified for the cooking utensil, to heat the cooking utensil with the to prioritize the target heating power specified for the cooking utensils and in particular to accept the occurrence of flicker and / or at least a change and / or at least a jump in the total output power of the heating units defining the cooking surface subareas. The control unit is advantageously intended to, in the operating state, in the event that it is impossible to avoid the occurrence of flicker and/or to keep the total output power of the heating units defining the cooking surface subareas constant while simultaneously heating the cooking utensil with the target heating power, the cooking utensil with the for To heat the cooking utensils specified target heating power and at the same time minimize the occurrence of flicker and / or at least a change and / or at least a jump in the total output power of the heating units defining the cooking surface areas. This means that particularly optimal cooking results can be achieved.

Optimum heating of cooking utensils can be achieved in particular by a hob, in particular by an induction hob, with at least one hob device according to the invention.

In particular, cooking utensils can be heated particularly advantageously by a method for operating a hob device with a plurality of heating units, which define at least one variable cooking surface area, which has at least one fixedly defined first cooking surface part area and at least one fixedly defined second cooking surface part area, wherein in at least one operating state, in which at least one part of a cooking utensil is placed in the cooking surface subareas, defining a total output power from the first cooking surface subarea first heating units of the heating units and a total output power from the second heating units of the heating units defining the second cooking surface area is kept at least substantially constant at all times. In particular, compliance with regulations regarding flicker can be made more difficult for competitors, which in particular can result in high competitiveness.

The hob device should not be limited to the application and embodiment described above. In particular, in order to fulfill the functionality described herein, the hob device can have a number of individual elements, components and units that deviate from the number mentioned herein. Further advantages result from the following drawing description. The drawing shows exemplary embodiments of the invention. The drawing, description and claims contain numerous features in combination.

Fig. 1

ein Kochfeld mit einer Kochfeldvorrichtung in einer Gargeschirrkonfiguration in einer schematischen Draufsicht,

Fig. 2

mehrere Diagramme, bei welchen für jedes Gargeschirr der Gargeschirrkonfiguration aus Fig. 1 jeweils eine Ausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 3

zwei Diagramme, in welchen für Heizeinheiten, die einen jeweiligen Kochflächenteilbereich der Kochfeldvorrichtung aus Fig. 1 definieren, jeweils eine Gesamtausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 4

das Kochfeld mit der Kochfeldvorrichtung in einer weiteren Gargeschirrkonfiguration in einer schematischen Draufsicht,

Fig. 5

mehrere Diagramme, bei welchen für jedes Gargeschirr der Gargeschirrkonfiguration aus Fig. 4 jeweils eine Ausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 6

zwei Diagramme, in welchen für Heizeinheiten, die einen jeweiligen Kochflächenteilbereich der Kochfeldvorrichtung aus Fig. 4 definieren, jeweils eine Gesamtausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 7

das Kochfeld mit der Kochfeldvorrichtung in einer weiteren Gargeschirrkonfiguration in einer schematischen Draufsicht,

Fig. 8

mehrere Diagramme, bei welchen für jedes Gargeschirr der Gargeschirrkonfiguration aus Fig. 7 jeweils eine Ausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 9

zwei Diagramme, in welchen für Heizeinheiten, die einen jeweiligen Kochflächenteilbereich der Kochfeldvorrichtung aus Fig. 7 definieren, jeweils eine Gesamtausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 10

das Kochfeld mit der Kochfeldvorrichtung in einer weiteren Gargeschirrkonfiguration in einer schematischen Draufsicht,

Fig. 11

mehrere Diagramme, bei welchen für jedes Gargeschirr der Gargeschirrkonfiguration aus Fig. 10 jeweils eine Ausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 12

zwei Diagramme, in welchen für Heizeinheiten, die einen jeweiligen Kochflächenteilbereich der Kochfeldvorrichtung aus Fig. 10 definieren, jeweils eine Gesamtausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung,

Fig. 13

ein alternatives Kochfeld mit einer alternativen Kochfeldvorrichtung in einer Gargeschirrkonfiguration in einer schematischen Draufsicht,

Fig. 14

mehrere Diagramme, bei welchen für jedes Gargeschirr der Gargeschirrkonfiguration aus Fig. 13 jeweils eine Ausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung und

Fig. 15

zwei Diagramme, in welchen für Heizeinheiten, die einen jeweiligen Kochflächenteilbereich der Kochfeldvorrichtung aus Fig. 13 definieren, jeweils eine Gesamtausgangsleistung über einer Zeit aufgetragen ist, in einer schematischen Darstellung.

Show it:

Fig. 1

a hob with a hob device in a cooking utensil configuration in a schematic top view,

Fig. 2

several diagrams for each cooking dish in the cooking dish configuration Fig. 1 an output power is plotted over a time in a schematic representation,

Fig. 3

two diagrams in which for heating units that have a respective cooking surface area of the hob device Fig. 1 define, in each case a total output power is plotted over a time, in a schematic representation,

Fig. 4

the hob with the hob device in a further cooking utensil configuration in a schematic top view,

Fig. 5

several diagrams for each cooking dish in the cooking dish configuration Fig. 4 an output power is plotted over a time in a schematic representation,

Fig. 6

two diagrams in which for heating units that have a respective cooking surface area of the hob device Fig. 4 define, a total output power is plotted over time in a schematic representation,

Fig. 7

the hob with the hob device in a further cooking utensil configuration in a schematic top view,

Fig. 8

several diagrams for each cooking dish in the cooking dish configuration Fig. 7 an output power is plotted over a time in a schematic representation,

Fig. 9

two diagrams in which for heating units that have a respective cooking surface area of the hob device Fig. 7 define, in each case a total output power is plotted over a time, in a schematic representation,

Fig. 10

the hob with the hob device in a further cooking utensil configuration in a schematic top view,

Fig. 11

several diagrams for each cooking dish in the cooking dish configuration Fig. 10 an output power is plotted over a time in a schematic representation,

Fig. 12

two diagrams in which for heating units that have a respective cooking surface area of the hob device Fig. 10 define, in each case a total output power is plotted over a time, in a schematic representation,

Fig. 13

an alternative hob with an alternative hob device in a cooking utensil configuration in a schematic top view,

Fig. 14

several diagrams for each cooking dish in the cooking dish configuration Fig. 13 In each case an output power is plotted over a time, in a schematic representation and

Fig. 15

two diagrams in which for heating units that have a respective cooking surface area of the hob device Fig. 13 define, in each case a total output power is plotted over a time, in a schematic representation.

Fig. 1 shows a hob 40a, which is designed as an induction hob. The hob 40a has a hob device 10a, which is designed as an induction hob device.

The hob device 10a has a stand plate 42a. In the present exemplary embodiment, the stand plate 42a is designed as a hob plate. In an assembled state, the mounting plate 42a forms part of an outer hob housing, in particular an outer hob housing, in particular of the hob 40a. The mounting plate 42a is intended for setting up cooking utensils 60a.

The hob device 10a has a plurality of heating units 12a for heating cooking utensils 60a. Of the multiple objects present in the figures, only one is provided with a reference number. In the present exemplary embodiment, the hob device 10a has fifty-six heating units 12a. The heating units 12a are arranged in an installed position below the mounting plate 42a. The heating units 12a are intended to heat cooking utensils 60a placed on the support plate 42a above the heating units 12a. The heating units 12a are designed as induction heating units in the present exemplary embodiment.

The hob device 10a has an operator interface 44a for inputting and/or selecting operating parameters, for example a heating power and/or a heating power density and/or a heating zone. The operator interface 44a is intended to output a value of an operating parameter to an operator.

The hob device 10a has a control unit 38a. The control unit 38a is intended to carry out actions and/or change settings depending on operating parameters entered via the operator interface 44a. The control unit 38a regulates an energy supply to the heating units 12a in an operating state.

The heating units 12a define a variable cooking surface area 14a. In the present exemplary embodiment, the variable cooking surface area 14a has a fixedly defined first cooking surface part area 16a and a fixedly defined second cooking surface part area 18a. The first cooking surface portion 16a and the second cooking surface portion 18a are arranged adjacent to one another and in particular partially adjoin one another. In the present exemplary embodiment, the first cooking surface portion 16a and the second cooking surface portion 18a are arranged adjacent to one another in a transverse direction 46a in the operating state.

First heating units 12a1 of the heating units 12a define the firmly defined first cooking surface section 16a. A number of first heating units 12a1 is essentially 50% of a total number of heating units 12a. The first heating units 12a1 of the heating units 12a defining the first cooking surface section 16a are connected to a first mains voltage phase 48a in the operating state.

Second heating units 12a2 of the heating units 12a define the firmly defined second cooking surface section 18a. A number of second heating units 12a2 is essentially 50% of a total number of heating units 12a. The second heating units 12a2 of the heating units 12a defining the second cooking surface section 18a are connected in the operating state to a second mains voltage phase 50a that is different from the first mains voltage phase 48a.

In the operating state, at least one part of a cooking utensil 60a is set up in the cooking surface sections 16a, 18a. In the case of one in Fig. 1 In the cooking utensil configuration shown, in the operating state, a first cooking utensil 60a1 is partially placed in the first cooking surface section 16a and partly in the second cooking surface section 18a. In the operating state, a first cooking utensil subarea 62a1 of the first cooking utensil 60a1 is set up in the first cooking surface subarea 16a and a second cooking utensil subarea 64a1 of the first cooking utensil 60a1 is set up in the second cooking surface subarea 18a. In the operating state, a second cooking utensil 60a2 is completely set up in the first cooking surface section 16a. In the operating state, a third cooking utensil 60a3 is completely set up in the second cooking surface section 18a.

In the operating state, the control unit 38a keeps a total output power from the first heating units 12a1 of the heating units 12a defining the first cooking surface subregion 16a essentially constant at all times. The total output power from the first heating units 12a1 of the heating units 12a defining the first cooking surface portion 16a is referred to below as the first total output power. In the operating state, the first total output power takes on a maximum value of a maximum power provided by the first mains voltage phase 48a.

In the operating state, the control unit 38a keeps a total output power from the second heating units 12a2 of the heating units 12a defining the second cooking surface portion 18a essentially constant at all times. The total output power from the second heating units defining the second cooking surface portion 18a 12a2 of the heating units 12a is referred to below as the second total output power. In the operating state, the second total output power takes on a maximum value of a maximum power provided by the second mains voltage phase 50a.

In the operating state, the control unit 38a operates the first heating units 12a1 which heat the first cooking utensil section 62a1 and the second heating units 12a2 which heat the second cooking utensil section 64a1 without overlapping in time (cf. Fig. 2 ). In the case of in Fig. 1 In the operating state of the cooking utensil configuration shown, the control unit 38a first operates the first heating units 12a1 which heat the first cooking utensil section 62a1 and then the second heating units 12a2 which heat the second cooking utensil section 64a1 (cf. Fig. 2 ).

In the operating state, the control unit 38a operates the first heating units 12a1 which heat the first cooking utensil section 62a1 and the second heating units 12a2 which heat the second cooking utensil section 64a1 within a particular single period Tsc. A sum of an activation duration t _on , ci of the first heating units 12a1 heating the first cooking utensil section 62a1 and an activation duration t _{on , CII} of the second heating units 12a2 heating the second cooking utensil section 64a1 is smaller in the example shown than the period Tsc.

In the operating state, the control unit 38a operates the first heating units 12a1 and the second heating units 12a2 while avoiding flicker (cf. Fig. 3 ). To avoid flicker, in the operating state, the control unit 38a keeps the total output power from the first heating units 12a1 defining the first cooking surface portion 16a and the total output power from the heating units 12a2 of the heating units 12a defining the second cooking surface portion 18a essentially constant at all times.

In the operating state, the control unit 38a operates the first heating units 12a1 and the second heating units 12a2 while avoiding intermodulation hum (cf. Fig. 2 ). In the operating state, the control unit 38a sets the output power of the heating units 12a via a respective frequency.

To avoid intermodulation hum, the control unit 38a selects an operating option from a catalog of operating options in the operating state. For example, the control unit 38a could avoid this in the operating state of intermodulation hum, operate the first heating units 12a1 and/or the second heating units 12a2 at least substantially at a substantially same frequency. This is in the figures, especially in Fig. 2 , 5 , 8th , 11 and 14 , marked by dashed hatching.

Alternatively or additionally, in the operating state to avoid intermodulation hum, the control unit 38a could operate the first heating units 12a1 and/or the second heating units 12a2 with frequencies that could differ by at least 17 kHz. This is in the figures, especially in Fig. 2 , 5 , 8th , 11 and 14 , marked by dash-dotted hatching.

For example, in the operating state to avoid intermodulation hum, the control unit 38a could alternatively or additionally deactivate at least part of the first and/or the second heating units 12a1, 12a2 and at least part of the first and/or the second heating units 12a1, 12a2 with a specific frequency operate. This is in the figures, especially in Fig. 2 , 5 , 8th , 11 and 14 , marked by solid hatching.

In the case of in Fig. 1 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2, with an essentially the same frequency (cf. Fig. 2 ). In a second time interval of the period Tsc, in the operating state, the control unit 38a operates first heating units 12a1, which are assigned to the second cooking utensil 60a2 set up in the first cooking surface section 16a, at a specific frequency and deactivates first heating units 12a1, which are set up in the first cooking surface section 16a are assigned to the first cooking utensil section 62a1. A sum of the first time interval and the second time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated first heating units 12a1 essentially constant at all times (cf. Fig. 3 ).

In the case of in Fig. 1 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state second heating units 12a2, which correspond to the third one set up in the second cooking surface section 18a Cooking utensils 60a3 are assigned, with a certain frequency and deactivates second heating units 12a2, which are assigned to the second cooking utensil subarea 64a1 set up in the second cooking surface subarea 18a (cf. Fig. 2 ). In a second time interval of the period Tsc, in the operating state, the control unit 38a operates second heating units 12a2, which are assigned to cooking utensils 60a set up in the second cooking surface section 18a, in particular the second cooking utensil section 64a1 and the third cooking utensils 60a3, with a substantially same frequency. A sum of the first time interval and the second time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated second heating units 12a2 essentially constant at all times (cf. Fig. 3 ).

Fig. 4 shows another cooking utensil configuration. In the case of in Fig. 4 In the cooking utensil configuration shown, in the operating state, a first cooking utensil 60a1 is partially placed in the first cooking surface section 16a and partly in the second cooking surface section 18a. In the operating state, a first cooking utensil subarea 62a1 of the first cooking utensil 60a1 is set up in the first cooking surface subarea 16a and a second cooking utensil subarea 64a1 of the first cooking utensil 60a1 is set up in the second cooking surface subarea 18a. In the operating state, a second cooking utensil 60a2 is completely set up in the first cooking surface section 16a. In the operating state, a third cooking utensil 60a3 is completely set up in the first cooking surface section 16a. In the operating state, a fourth cooking utensil 60a4 is completely set up in the second cooking surface section 18a.

In the case of in Fig. 4 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3, with essentially the same frequency (cf. Fig. 5 ). In the operating state, the control unit 38a operates first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3, with frequency in a second time interval of the period T _SC , which differ by at least 17 kHz. In a third time interval of the period T _SC the operates Control unit 38a in the operating state first heating units 12a1, which are assigned to the second cooking utensil 60a2 and the third cooking utensil 60a3, with frequencies that differ by at least 17 kHz. A sum of the first time interval, the second time interval and the third time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated first heating units 12a1 essentially constant at all times (cf. Fig. 6 ).

In the case of in Fig. 4 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state second heating units 12a2, which are assigned to the fourth cooking utensil 60a4 set up in the second cooking surface section 18a, at a certain frequency and deactivates second heating units 12a2, which are in the second Cooking surface section 18a is assigned to the second cooking utensil section 64a1 (cf. Fig. 5 ). In a second time interval of the period Tsc, in the operating state, the control unit 38a operates second heating units 12a2, which are assigned to the second cooking utensil subarea 64a1 set up in the second cooking surface subarea 18a, at a specific frequency and deactivates second heating units 12a2, which are set up in the second cooking surface subarea 18a fourth cooking dishes 60a4 are assigned. A sum of the first time interval and the second time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated second heating units 12a2 essentially constant at all times (cf. Fig. 6 ).

Fig. 7 shows another cooking utensil configuration. In the case of in Fig. 7 In the cooking utensil configuration shown, in the operating state, a first cooking utensil 60a1 is partially placed in the first cooking surface section 16a and partly in the second cooking surface section 18a. In the operating state, a first cooking utensil subarea 62a1 of the first cooking utensil 60a1 is set up in the first cooking surface subarea 16a and a second cooking utensil subarea 64a1 of the first cooking utensil 60a1 is set up in the second cooking surface subarea 18a. In the operating state, a second cooking utensil 60a2 is completely set up in the first cooking surface section 16a. In the operating state, a third cooking utensil 60a3 is completely set up in the first cooking surface section 16a. In the operating state, a fourth cooking utensil 60a4 is completely in the second cooking surface area 18a set up. In the operating state, a fifth cooking utensil 60a5 is completely set up in the second cooking surface section 18a.

In the case of in Fig. 7 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3, with essentially the same frequency (cf. Fig. 8 ). In the operating state, in a second time interval of the period T _SC , the control unit 38a operates first heating units 12a1, which are assigned to the second cooking utensil 60a2 and the third cooking utensil 60a3, with frequencies that differ by at least 17 kHz, and deactivates first heating units 12a1, which are assigned to the first cooking utensil section 62a1. In a third time interval of the period Tsc, in the operating state, the control unit 38a operates first heating units 12a1, which are assigned to the second cooking utensil 60a2 and the third cooking utensil 60a3, with frequencies that differ by at least 17 kHz, and deactivates first heating units 12a1, which are assigned to the second cooking utensil 60a2 and the third cooking utensil 60a3 are assigned to the first cooking utensil section 62a1. A sum of the first time interval and the second time interval and the third time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated first heating units 12a1 essentially constant at all times (cf. Fig. 9 ).

In the case of in Fig. 7 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state second heating units 12a2, which are assigned to the fourth cooking utensil 60a4 and the fifth cooking utensil 60a5, with frequencies that differ by at least 17 kHz, and deactivates second heating units 12a2 , which are assigned to the second cooking utensil section 64a1 (cf. Fig. 8 ). In a second time interval of the period Tsc, in the operating state, the control unit 38a operates second heating units 12a2, which are assigned to the fourth cooking utensil 60a4, at a specific frequency and deactivates second heating units 12a2, which are assigned to the fifth cooking utensil 60a5 and the second cooking utensil section 64a1. In a third time interval of the period T _SC, the control unit 38a operates second heating units 12a2 in the operating state, which are assigned to the second cooking utensil section 64a1 and the fifth cooking utensil 60a5 are, with frequencies that differ by at least 17 kHz, and deactivates second heating units 12a2, which are assigned to the fourth cooking utensil 60a4. A sum of the first time interval and the second time interval and the third time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38a keeps a total output power of activated second heating units 12a2 essentially constant at all times (cf. Fig. 9 ).

One in Fig. 10 The cooking utensil configuration shown corresponds to that in Fig. 4 Cookware configuration shown, which is why reference is made to the description above at this point. It is assumed below that it is impossible to simultaneously keep the total output power of the heating units 12a defining the cooking surface areas 16a, 18a constant and heat the cooking utensils 60a with target heating powers specified for the respective cooking utensil 60a. In the event that it is impossible to keep the total output power of the heating units 12a defining the cooking surface subareas 16a, 18a constant while simultaneously heating the cooking utensils 60a with the target heating power specified for the corresponding cooking utensil 60a, the control unit 38a prioritizes heating the cooking utensils 60a with that for the corresponding cooking utensil 60a specified target heating output (cf. Fig. 12 ).

In the case of in Fig. 10 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3, with essentially the same frequency (cf. Fig. 11 ). In the operating state, the control unit 38a operates first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular the first cooking utensil subarea 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3, with frequencies in a second time interval of the period T _SC , which differ by at least 17 kHz. The control unit 38a operates in a third time interval of the period Tsc, which is referred to as an overlap time interval, in the operating state first heating units 12a1, which are placed in the first cooking surface section 16a of cooking utensils 60a, in particular the first cooking utensil section 62a1 and the second cooking utensil 60a2 and the third cooking utensil 60a3 , are assigned, and second Heating units 12a2, which are assigned to cooking utensils 60a placed in the second cooking surface portion 18a, in particular the second cooking utensil portions 64a1 and the fourth cooking utensils 60a4, with a substantially same frequency. In a fourth time interval of the period Tsc, in the operating state, the control unit 38a operates first heating units 12a1, which are assigned to the second cooking utensil 60a2 and the third cooking utensil 60a3, at frequencies that differ by at least 17 kHz. A sum of the first time interval and the second time interval and the third time interval and the fourth time interval corresponds essentially and in particular completely to the period Tsc. A total output power of activated first heating units 12a1 in the overlap time interval is lower than a total output power of activated first heating units 12a1 in remaining time intervals of the period Tsc (cf. Fig. 12 ).

In the case of in Fig. 10 In the cooking utensil configuration shown, the control unit 38a operates in a first time interval of the period T _SC in the operating state second heating units 12a2, which are assigned to the fourth cooking utensil 60a4 set up in the second cooking surface section 18a, at a certain frequency and deactivates second heating units 12a2, which are in the second Cooking surface section 18a is assigned to the second cooking utensil section 64a1 (cf. Fig. 11 ). A second time interval corresponds to the overlap time interval, which is why reference is made to the above description at this point. In a third time interval of the period Tsc, in the operating state, the control unit 38a operates second heating units 12a2, which are assigned to the second cooking utensil section 64a1, at a specific frequency and deactivates second heating units 12a2, which are assigned to the fourth cooking utensil 60a4. A sum of the first time interval and the second time interval and the third time interval corresponds essentially and in particular completely to the period Tsc. A total output power of activated second heating units 12a2 in the overlap time interval is lower than a total output power of activated second heating units 12a2 in remaining time intervals of the period T _SC (cf. Fig. 12 ).

Alternatively, in the operating state, for example in the overlap time interval, the control unit 38a could be assigned to first heating units 12a1, which are assigned to cooking utensils 60a set up in the first cooking surface subarea 16a, in particular to the first cooking utensil subarea 62a1 and the second cooking utensils 60a2 and the third cooking utensils 60a3 are, and second heating units 12a2, which are assigned to cooking utensils 60a set up in the second cooking surface subarea 18a, in particular the second cooking utensil subarea 64a1 and the fourth cooking utensils 60a4, operate at frequencies which could differ by at least 17 kHz.

In a method for operating the hob device 10a, in the operating state in which a part of a cooking utensil 60a is set up in each of the cooking surface subareas 16a, 18a, a total output power from the first heating units 12a1 of the heating units 12a defining the first cooking surface subregion 16a and a total output power from the second heating units 12a2 of the heating units 12a defining the second cooking surface portion 18a are kept essentially constant at all times.

In Fig. 13 to 15 Another embodiment of the invention is shown. The following descriptions are essentially limited to the differences between the exemplary embodiments, with regard to the same components, features and functions being referred to the description of the exemplary embodiment Fig. 1 to 12 can be referred. To distinguish between the exemplary embodiments, the letter a is in the reference numerals of the exemplary embodiment in the Fig. 1 to 12 by the letter b in the reference numbers of the exemplary embodiment Fig. 13 to 15 replaced. With regard to components with the same designation, in particular with regard to components with the same reference numerals, one can in principle also refer to the drawings and/or the description of the exemplary embodiment Fig. 1 to 12 to get expelled.

Fig. 13 shows a hob 40b, which is designed as an induction hob, with a hob device 10b, which is designed as an induction hob device.

Heating units 12b of the hob device 10b define a variable cooking surface area 14b. In the present exemplary embodiment, the variable cooking surface area 14b has a fixedly defined first cooking surface part area 16b and a fixedly defined second cooking surface part area 18b and a fixedly defined third cooking surface part area 20b. The first cooking surface portion 16b and the second cooking surface portion 18b and the third cooking surface portion 20b are arranged adjacent to one another and in particular partially adjoin one another, in particular in a transverse direction 46b.

First heating units 12b1 of the heating units 12b define the firmly defined first cooking surface section 16b. The first heating units 12b1 of the heating units 12b defining the first cooking surface section 16b are connected to a first mains voltage phase 48b in the operating state.

Second heating units 12b2 of the heating units 12b define the firmly defined second cooking surface section 18b. The second heating units 12b2 of the heating units 12b defining the second cooking surface section 18b are connected in the operating state to a second mains voltage phase 50b that is different from the first mains voltage phase 48b.

Third heating units 12b3 of the heating units 12b define the firmly defined third cooking surface section 20b. The third heating units 12b3 of the heating units 12b defining the third cooking surface section 20b are connected in the operating state to a third mains voltage phase 52b which is different from the first mains voltage phase 48b and from the second mains voltage phase 50b.

In the operating state, at least part of a cooking utensil 60b is set up in each of the cooking surface areas 16b, 18b, 20b. In the case of one in Fig. 13 In the cooking utensil configuration shown, in the operating state, a first cooking utensil 60b1 is placed partly in the first cooking surface subarea 16b and partly in the second cooking surface subregion 18b and partly in the third cooking surface subregion 20b. In the operating state, a first cooking utensil sub-area 62b1 of the first cooking utensil 60b1 is set up in the first cooking surface sub-area 16b and a second cooking utensil sub-area 64b1 of the first cooking utensil 60b1 is set up in the second cooking surface sub-area 18b and a third cooking utensil sub-area 66b1 of the first cooking utensil 60b1 is set up in the third cooking surface sub-area 20b. In the operating state, a second cooking utensil 60b2 is completely set up in the first cooking surface section 16b. In the operating state, a third cooking utensil 60b3 is set up completely in the second cooking surface section 18b. In the operating state, a fourth cooking utensil 60b4 is completely set up in the third cooking surface section 20b.

In the operating state, the control unit 38b operates the first heating units 12b1 which heat the first cooking utensil section 62b1 and the second heating units 12b2 which heat the second cooking utensil section 64b1 and the third heating units 12b3 which heat the third cooking utensil section 66b1 without overlapping in time (cf. Fig. 14 ). In the operating state, the control unit 38b operates the first heating units 12b1 which heat the first cooking utensil section 62b1 and the second heating units 12b2 which heat the second cooking utensil section 64b1 and the third heating units 12b3 which heat the third cooking utensil section 66b1 within a particular single period Tsc. A sum of an activation duration t _on , ci of the first heating units 12b1 heating the first cooking utensil sub-area 62b1 and an activation duration t _{on, CII} of the second heating units 12b2 heating the second cooking utensil sub-area 64b1 and an activation duration t _on , _CIII of the third heating units 12b3 heating the third cooking utensil sub-area 66b1 in the example shown is smaller than the period T _SC .

In the case of in Fig. 13 In the cooking utensil configuration shown, the control unit 38b operates first heating units 12b1, which are assigned to the first cooking utensil section 62b1, at a certain frequency in a first time interval of the period T _SC in the operating state and deactivates first heating units 12b1, which are assigned to the second cooking utensil 60b2 (cf. Fig. 14 ). In a second time interval of the period T _SC, in the operating state, the control unit 38b operates first heating units 12b1, which are assigned to the second cooking utensil 60b2, at a certain frequency and deactivates first heating units 12b1, which are assigned to the first cooking utensil subarea 62b1 set up in the first cooking surface subarea 16b . A sum of the first time interval and the second time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38b keeps a total output power of activated first heating units 12b1 essentially constant at all times (cf. Fig. 15 ).

In the case of in Fig. 13 In the cooking utensil configuration shown, the control unit 38b operates second heating units 12b2, which are assigned to the third cooking utensil 60a3, at a certain frequency in a first time interval of the period T _SC and in a third time interval of the period T _SC in the operating state and deactivates second heating units 12b2, which are assigned to the third cooking utensil 60a3 second cooking utensil subarea 62b1 are assigned (cf. Fig. 14 ). In a second time interval of the period Tsc, in the operating state, the control unit 38b operates first heating units 12b1, which are assigned to the second cooking utensil section 64b1, at a specific frequency and deactivates first heating units 12b1, which are assigned to the third cooking utensil 60b3. A sum of the first time interval and the second time interval essentially corresponds and in particular completely the period Tsc. In the operating state, the control unit 38b keeps a total output power of activated second heating units 12b2 essentially constant at all times (cf. Fig. 15 ).

In the case of in Fig. 13 In the cooking utensil configuration shown, the control unit 38b operates third heating units 12b3, which are assigned to the fourth cooking utensil 60b4, at a certain frequency in a first time interval of the period T _SC in the operating state and deactivates third heating units 12b3, which are assigned to the third cooking utensil subarea 66b1 (cf. Fig. 14 ). In a second time interval of the period T _SC , in the operating state, the control unit 38b operates third heating units 12b3, which are assigned to the third cooking utensil section 66b1, at a specific frequency and deactivates third heating units 12b3, which are assigned to fourth cooking utensils 60b4. A sum of the first time interval and the second time interval corresponds essentially and in particular completely to the period Tsc. In the operating state, the control unit 38b keeps a total output power from activated third heating units 12b3 essentially constant at all times (cf. Fig. 15 ).

Reference symbols

10

Hob device

12

Heating unit

14

Variable cooking surface area

16

First cooking surface area

18

Second cooking surface area

20

Third cooking surface area

38

Control unit

40

Hob

42

Standing plate

44

Operator interface

46

Transverse direction

48

First mains voltage phase

50

Second mains voltage phase

52

Third mains voltage phase

60

cooking utensils

62

First cooking utensil section

64

Second cooking utensil section

66

Third cooking utensil section

Claims (12)

1. Hob apparatus, in particular induction hob apparatus, with a plurality of heating units (12a-b), which define at least one variable cooking surface area (14a-b), which has at least one permanently defined first partial cooking surface area (16a-b) and at least one permanently defined second partial cooking surface area (18a-b), characterised in that at least one control unit (38a-b), which, in at least one operating state in which at least one part of an item of cookware (60a-b) is placed in the partial cooking surface areas (16a-b, 18a-b) in each case, keeps a total output power, specifically a sum of the output powers of all heating units (12a-b) defining the partial cooking surface area (16a-b, 18a-b) at a particular time point, of first heating units (12a1-b1) of the heating units (12a-b) which define the first partial cooking surface area (16a-b) and a total output power of second heating units (12a2-b2) of the heating units (12a-b) which define the second partial cooking surface area (18a-b), at least essentially constant at all times, specifically that, in the operating state, the control unit (38a-b) sets a total output power at a given time point and a further total output power at a given further time point such that a quotient of a smaller power of the total output powers and of a larger power of the total output powers amounts to at least 0.9.
2. Hob apparatus according to claim 1, characterised in that, in the operating state, at least a majority of the first heating units (12a1-b1) are connected to a first line current voltage phase (48a-b) and at least a majority of the second heating units (12a2-b2) are connected to a second line current voltage phase (50a-b) which is different from the first line current voltage phase (48a-b).
3. Hob apparatus according to claim 2, characterised in that, in the operating state, the first total output power assumes at most a value of a maximum power provided by the first line current voltage phase (48a-b).
4. Hob apparatus according to one of the preceding claims, characterised in that, in the operating state, at least one first partial cookware area (62a-b) of the item of cookware (60a-b) is placed in the first cooking surface area (16a-b) and at least one second partial cookware area (64a-b) of the item of cookware (60a-b) is placed in the second cooking surface area (18a-b).
5. Hob apparatus according to claim 4, characterised in that, in the operating state, the control unit (38a-b) operates the first heating units (12a1-b1) heating the first partial cookware area (62a-b) and the second heating units (12a2-b2) heating the second partial cookware area (64a-b) without any temporal overlap.
6. Hob apparatus according to claim 4 or 5, characterised in that, in the operating state, a sum of an activation time of the first heating units (12a1-b 1) heating the first partial cookware area (62a-b) and an activation time of the second heating units (12a2-b2) heating the second partial cookware area (64a-b) corresponds to at most one period duration.
7. Hob apparatus according to one of claims 4 to 6, characterised in that the variable cooking surface area (14b) has an at least permanently defined third cooking surface area (20b), in which, in the operating state, at least one third partial cookware area (66b) of the item of cookware (60b) is placed.
8. Hob apparatus according to one of claims 2 and 7, characterised in that, in the operating state, at least a majority of the third heating units (12b3) of the heating units (12b) defining the third partial cooking surface area (20b) are connected to a third line current voltage phase (52b).
9. Hob apparatus according to one of the preceding claims, characterised in that, in the operating state, the control unit (38a-b) operates the first heating units (12a1-b1) and the second heating units (12a2-b2) without intermodulation noise.
10. Hob apparatus according to one of the preceding claims, characterised in that the control unit (38a-b) is provided to prioritise heating of the item of cookware (60a-b) with the target heating power predefined for the item of cookware (60a-b) in the event that it is not possible to keep the total output powers of the heating units (12a-b) defining the partial cooking surface areas (16a-b, 18a-b, 20a-b) constant while simultaneously heating the item of cookware (60a-b) with a target heating power predefined for the item of cookware (60a-b).
11. Hob, in particular induction hob, with at least one hob apparatus (10a-b) according to one of the preceding claims.
12. Method for operating a hob apparatus (10a-b), in particular according to one of claims 1 to 10, with a plurality of heating units (12a-b), which define at least one variable cooking surface area (14a-b), which has at least one permanently defined first partial cooking surface area (16a-b) and at least one permanently defined second partial cooking surface area (18a-b), characterised in that, in at least one operating state, in which at least one part of an item of cookware (60a-b) is placed in the partial cooking surface areas (16a-b, 18a-b) in each case, a total output power, specifically a sum of the output powers of all heating units (12a-b) defining the partial cooking surface area (16a-b, 18a-b) at a particular time point, of first heating units (12a1-b1) of the heating units (12a-b) which define the first partial cooking surface area (16a-b) and a total output power of second heating units (12a2-b2) of the heating units (12a-b) which define the second partial cooking surface area (18a-b) is kept at least essentially at a constant at all times, specifically that, in the operating state, a total output power at a given time point and a further total output power at a given further time point is set such that a quotient of a smaller power of the total output powers and of a larger power of the total output powers amounts to at least 0.9.

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