DE102019215954A1 - Cooking device - Google Patents

Abstract

The invention relates to a cooking device (10), in particular a cooktop device, with a control unit (12), which is provided for controlling and supplying energy to at least one first induction target (14) and at least one second induction target (16) It is proposed to improve control that the control unit (12) is intended to switch to at least one special operating state in which the control unit (12) does so when at least one tolerance condition exists between the first induction target (14) and the second induction target (16) the first induction target (14) and the second induction target (16) are combined to form a common induction target (32) and a first heating frequency to control the first induction target (14) and a second heating frequency to control the second induction target (16) are coordinated .

Description

The invention relates to a cooking device according to the preamble of claim 1 and a method for operating a cooking device according to the preamble of claim 14.

Hobs are already known from the prior art, which have inductors which are operated with matched heating frequencies to avoid acoustically perceptible coupling noises, control schemes for controlling inductors for heating cooking utensils as a result of increased customer requirements for control quality and functionality of a hob in a complex determination and calculation process can be determined, which places high demands on production and on built components and therefore results in high costs. The publication EP 1 951 003 B1 discloses in this context a method for the simultaneous, inductive operation of two inductors of an induction hob to avoid the occurrence of coupling noises and an uneven power network load, with the method in a first time interval with the inductors together with a first heating frequency and in a second time interval a second heating frequency different from the first heating frequency. The publication also discloses US 7,910,865 B2 a method for operating an induction hob, in which the inductors are operated during a mode with a common heating frequency and during another mode with different heating frequencies, the heating frequencies having a frequency spacing between 15 kHz and 25 kHz.

The object of the invention is, in particular, to provide a generic cooking appliance device with improved properties with regard to control. The object is achieved by the features of claims 1 and 14, while advantageous refinements and developments of the invention can be found in the subclaims.

The invention is based on a cooking device device, in particular a cooktop device, with a control unit which is used in particular to define at least one first induction target and at least one second induction target and to control and supply energy to at least one first induction target, in particular said first induction target, and at least one second induction target, in particular said second induction target, is provided.

It is proposed that the control unit be provided to transition to at least one special operating state, in which the control unit is provided, the first induction target and the second induction target, if at least one tolerance condition is met between the first induction target and the second induction target to combine them into a common induction target and to coordinate a first heating frequency for controlling the first induction target and a second heating frequency for controlling the second induction target, in particular in order to avoid coupling noises and / or flicker and / or a time-uneven load on the mains supply.

The inventive design enables a generic cooking appliance device with improved properties with regard to a particularly simplified control and in particular with regard to low-noise operation to be provided. A simplified control can in particular significantly reduce the effort for determining control schemes. In this way, in particular inexpensive and / or less powerful components can be used. Expense which increases exponentially with a number of induction targets for controlling a desired heating output desired by an operator can advantageously be reduced. In particular, simple performance control can be made possible. In this way, in particular an unfavorable acoustic load on an operator can be avoided, as a result of which in particular a high level of operating comfort and in particular a positive impression can be achieved with the operator in particular with regard to acoustic quality. Flicker can preferably be according to a flicker standard, in particular according to the DIN EN 61000-3-3 Standard, can be avoided by advantageous control of individual induction targets. In particular, a reliable configuration can preferably be achieved in relation to a target heating output requested by the operator. In particular, several induction targets can advantageously be operated simultaneously with little noise and with a low-fluctuation load on a supply network.

In particular, the control unit can define a third and advantageously any number of induction targets, which the control unit can combine to form one or more common induction targets in the special operating state. In particular, a large number of induction targets can be present, which in particular combines the control unit into one or more common induction targets. The induction targets can be supplied with electrical energy simultaneously from one or more energy sources. In particular, the control unit controls the energy supply of the induction targets from the energy source or sources. In particular, the common induction target can be a combination of at least two induction targets. In particular, a large number of independent induction targets can be present, which can be controlled by the control unit in the special operating state with heating frequencies, in particular while avoiding coupling noises.

A “cooking device device”, advantageously a “hob device” and particularly advantageously an “induction hob device” is intended to mean in particular at least a part, in particular a sub-assembly, of a cooking device, in particular a baking oven, for example an induction baking oven, and advantageously a hob and particularly advantageously an induction hob will. A household appliance having the cooking appliance device is advantageously a cooking appliance. A household appliance designed as a cooking appliance could, for example, be an oven and / or a microwave and / or a grill appliance and / or a steam cooking appliance. A domestic appliance designed as a cooking appliance is advantageously a hob and preferably an induction hob.

An “energy source” is to be understood in particular as a unit which provides electrical energy in the form of an electrical voltage, an electrical current and / or an electrical and / or electromagnetic field of at least one further unit and / or at least one electrical circuit. The energy source can in particular be an electrical current phase of a power supply network. In particular, the energy source can provide a maximum output of 3.7 kW. An inverter can advantageously be arranged between the energy source and at least one induction target, preferably all induction targets, in order to provide a high-frequency supply voltage with a suitable heating frequency. In particular, the energy source can have an inverter unit. In particular, the inverter unit can have at least one, in particular also a plurality of inverters for providing a high-frequency supply voltage with a suitable heating frequency for induction targets.

An “induction target” is to be understood in particular as meaning at least part of a cookware and at least one inductor or more inductors for heating at least part of the dishes, the inductors advantageously being operated at a common heating frequency.

A “first and / or second induction target” is to be understood in particular to mean a group of one inductor or a plurality of inductors which are operated together with the same heating frequency, in particular from the same energy source, for the same period and which, in at least one operating state, have at least part of one heat the same cookware, and if there are more than two inductors in the group that heat the same cookware, they are arranged in a coherent manner, with no other group of inductors that are operated from the same energy source heating the same part of the cookware. In particular, the control unit can define and / or redefine any induction targets for the first or second induction targets. The fact that the inductors are arranged “contiguously” is to be understood in particular to mean that the inductors belong to the same group and adjoin at least one of the inductors in the group, no other inductor being arranged in between.

A “common induction target” is to be understood in particular as an induction target which comprises at least a first and at least a second induction target and which the control unit treats as a single induction target, in particular when determining at least one control scheme, the two induction targets having the same heating frequency or else can be operated with different heating frequencies.

An “inductor” is to be understood here to mean in particular an element which, in at least one operating state, supplies energy to at least one cookware for the purpose of heating the cookware, in particular in the form of an alternating magnetic field which is provided in a metallic, preferably at least partially ferromagnetic, Heating means, in particular cookware, cause eddy currents and / or magnetic reversal effects, which are converted into heat. The inductor has in particular at least one induction coil and is in particular intended to supply energy to the cookware in the form of an alternating magnetic field with a heating frequency. The inductor is arranged in particular below and advantageously in the vicinity of at least one base plate of the cooking device device. In particular, a projection of the inductor can have different shapes, for example a circular, oval or at least essentially rectangular shape. In this context, “at least essentially” is to be understood in particular to mean that a deviation from a predetermined value is in particular less than 25%, preferably less than 10% and particularly preferably less than 5% of the predetermined value. In particular, the inductors can have different extents compared to one another. The cooking device device advantageously has a large number of inductors, which can in particular be arranged in a matrix, the inductors arranged in a matrix being able to form a variable cooking surface.

Alternatively or additionally, the inductors can form a cooking surface which has firmly defined cooking zones. In particular, at least one inductor or part of an inductor and in particular exactly one inductor can be assigned to the permanently defined cooking zones. A “firmly defined” cooking zone is to be understood in particular to mean a cooking zone whose position 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 fixed and / or independent of an induction target configuration and / or of a cookware configuration. For example, a fixedly defined cooking zone could be fixed in an unchangeable and / or constant manner by at least one connection of the inductors assigned to the fixedly defined cooking zone to a common electrical current phase and / or by a spatial arrangement of the inductors assigned to the fixedly defined cooking zone. In particular, the inductors can be combined with one another to form induction targets of any size, in particular with different contours.

A “control unit” is to be understood in particular to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooking device device, in particular a hob device, advantageously an induction hob device, and which is in particular provided for at least one inverter unit of the cooking device device to control and / or regulate with at least one inverter, in particular a resonance inverter and / or a dual half-bridge inverter. In particular, the control unit evaluates a signal provided by a unit, in particular a sensor and / or detection unit, according to which the control unit can initiate a special process and / or operating state, in particular if at least one condition is met. The control unit preferably comprises a computing unit and in particular, in addition to the computing unit, a storage unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit. In particular, the cooking device device can have a switching unit. In particular, the switching unit is controlled by the control unit, the switching unit in particular establishing an electrical connection between at least one energy source and at least one energy consumer, for example the induction target. The switching unit can in particular have at least one electromechanical or semiconductor-based switching element and can be provided for establishing at least one electrical connection between at least one energy source and at least one induction target. A “switching element” is to be understood in particular as an element which is intended to establish and / or separate an electrically conductive connection between two points, in particular contacts of the switching element. The switching element preferably has at least one control contact via which it can be switched. In particular, the switching element is designed as a semiconductor switching element, in particular as a transistor, for example as a metal oxide semiconductor field effect transistor (MOSFET), advantageously as a bipolar transistor with a preferably insulated gate electrode (IGBT). Alternatively, the switching element is designed as a mechanical and / or electromechanical switching element, in particular as a relay.

A “special operating state” is to be understood in particular to mean an operating state which differs in particular from a normal operating state in which in particular the control unit controls each induction target individually and in particular operates individually and independently of one another. In particular, the control unit checks for the existence of at least one tolerance condition at least between the first induction target and at least the second induction target and, if the tolerance condition is present, changes to the special operating state. For example, the control unit checks how strongly a respective average output heating output of the first and / or second induction target changes compared to a target heating output, which can be adjusted in particular by a target heating frequency, of the first and / or second induction target when a respective heating frequency varies by the respective target heating frequency in a frequency interval. If the average output heating power is within a tolerance interval, which is the tolerance condition in the present example, and the respective frequency intervals overlap, i.e. the first and second induction target can be operated within the tolerance interval with a common heating frequency, the control unit initiates the special operating state and / or changes to the special operating state.

In particular, in the special operating state, a summary of several induction targets, in particular by the Control unit instead of a common induction target, which is operated as a single, in particular independent induction target, wherein in particular the multiple induction targets can be controlled by the control unit coordinated. In the special operating state, there is a special control of a unit, in particular the induction targets, and / or the control unit applies a special method and / or algorithm to the unit and in particular to the induction targets, the control unit in particular operating the induction targets in a coordinated manner. In a normal operating state, the control unit operates the multiple induction targets independently of one another, in particular simultaneously and in particular each with its own heating frequency.

In each operating state, the control unit provides in particular at least one output heating output of at least the first and / or second and / or common induction target, advantageously at least a majority of the output heating outputs of the first and / or second and / or common induction target and preferably all output heating outputs of the first and / or second and / or a common induction target by means of a heating frequency and / or by means of a duty cycle. An “output heating power” of the first and / or second and / or common induction target is to be understood in particular as an electrical power which inductors of the first and / or second and / or common induction target a cooking utensil of the first and / or second and / or provides a common induction target for heating within a time interval.

A “coupling noise” is to be understood to mean, in particular, an acoustic intermodulation noise that can be perceived by humans and especially by pets with average hearing, which can arise through intermodulation of heating frequencies, in particular due to an electrical supply of in particular different induction targets, and an intermodulation frequency, in particular between 10 Hz and 65 kHz and preferably between 20 Hz and 20 kHz.

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

A “definition of an induction target” is to be understood in particular to mean a process in which at least one inductor is assigned to at least part of a cooking utensil, which is arranged at least partially above the inductor on a mounting surface of the cooking appliance device, for the purpose of heating.

The fact that a plurality of heating frequencies are “matched” is to be understood in particular to mean that the heating frequencies have one and / or at least one logical condition or valid functional relationship that is valid for at least one period, for example a mutual frequency spacing or a fixed factor between frequency values of the heating frequencies , meet or have.

“Provided” is to be understood in particular to be specially programmed, designed and / or equipped. The fact that an object is provided for a specific function should in particular be understood to mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

The tolerance condition could be a condition for a maximum frequency spacing between the target heating frequencies of the first and second induction target. Accordingly, the control unit could, in particular, summarize target heating frequencies that are close to one another and do not exceed the maximum frequency spacing, in particular if respective power curves of the first and second induction target have similar characteristic properties, such as a similar profile, for example. The tolerance condition could be a condition for a frequency spacing between the target heating frequencies first and second induction target of at least 17 kHz, advantageously 20 kHz. However, the condition for the maximum frequency spacing between the target heating frequencies of the first and second induction target and / or the requirement for a frequency spacing between the target heating frequencies of the first and second induction target of at least 17 kHz, advantageously of 20 kHz, can lead to average output powers, which for a Cooking mode has unfavorable deviations from target heating outputs, which can lead, for example, to a longer cooking time or to the burning of a food to be cooked, which is why the tolerance condition shows further criteria in addition to the conditions mentioned above.

It is further proposed that the tolerance condition be a condition for a maximum deviation of a respective average, in particular dependent on a heating frequency, output heating power of the two induction targets during continuous operation with the respective one Heating frequency, in particular the first or the second heating frequency, of a respective target heating power of the induction targets. In this way, a precise control and / or provision of at least one heating power set in particular by an operator can advantageously take place. An “average output heating power” is to be understood as an output heating power of an induction target averaged over a period. In particular, the average output heating power of each individual inductor of the cooking device device during continuous operation for a heating frequency range in which the inductors can be controlled by the control unit in at least one operating state, in particular stored in at least one value table in a storage unit of the control unit and can be called up by the control unit or can be determined from the table of values. As an alternative or in addition, the control unit can initiate, in particular before the start of the special operating state, a test operating state which is in particular limited in time and which in particular has a duration of several and advantageously of exactly one period, for the purpose of determining the average output heating power which is required for the continuous operation of each individual inductor of activated induction targets and / or each induction target. In particular, the control unit can carry out a frequency sweep in the test operating state, during which the control unit measures a target heating power for all target heating frequencies of an entire frequency range provided for one operating state, in particular for all operating states, which occurs during continuous operation when an induction target is controlled with the target heating frequency , and in the form of a specific power curve for each induction target and in particular stores it. A “target heating power” is to be understood in particular to mean a heating power set and / or required by an operator, in particular for a cooking process, the target heating power being adjustable in particular by a target heating frequency.

In addition, it is proposed that, according to the tolerance condition, the maximum deviation is within a tolerance interval of +15% / -15%. In this way, in particular a reliable provision of a heating output required by the operator can be achieved. This allows user-friendly control to be achieved, which can increase customer satisfaction. Even more advantageously, a lower upper limit of the tolerance interval of +5% compared to a lower limit of the tolerance interval of -10% prevents a risk of the food being burned on and / or burning during a cooking process.

Furthermore, it is proposed that the control unit, in the special operating state and in particular depending on the situation, select the first heating frequency and the second heating frequency with a mutual frequency spacing of in particular a maximum of 20 Hz and advantageously of 0 kHz. The control unit advantageously operates the first induction target and the second induction target with a common heating frequency. “Depending on the situation” is to be understood in particular to mean the existence of a tolerance condition, advantageously a fulfillment of the tolerance condition, between the first induction target and the second induction target. In particular, this enables simple control of average output heating outputs. In particular, the respective average output heating power of the first and second induction target has a deviation from the respective target heating power within the tolerance interval. In particular, a sum of the respective average output heating power of the first and second induction target has a deviation from a sum of the respective target heating powers within the tolerance interval.

Alternatively, it is proposed that the control unit select the first heating frequency and the second heating frequency with a mutual frequency spacing of at least 17 kHz in the special operating state and in particular depending on the situation. As a result, coupling noises in particular can be avoided when the first and second induction target are operated simultaneously. In addition, in particular a simplified control sequence of heating frequencies, in particular of inductors and / or induction targets, can be created. In particular, the respective average output heating power of the first and second induction target has a deviation from the respective target heating power within the tolerance interval. In particular, a sum of the respective average output heating power of the first and second induction target has a deviation from a sum of the respective target heating powers within the tolerance interval.

It is also proposed that the control unit, in the special operating state, select the frequency spacing as a function of selected target powers for the two induction targets. In this way, in particular, an accuracy in providing at least one output heating power can be increased. In particular, the control unit checks the deviation of the respective average output heating power of the first and second induction target from the respective target heating power and / or the sum of the respective average output heating power of the first and second induction target from the sum of the respective target heating powers for the frequency spacing of 0 Hz and the frequency spacing of at least 17 kHz and advantageously selects the frequency spacing with a smaller deviation from the target heating output of the first and / or second induction target and / or from the sum of the target heating outputs of the first and second induction target.

It is also proposed that the control unit in the special operating state be intended to treat the common induction target as a single induction target when determining at least one control scheme for controlling the two, in particular first and second induction targets and at least one further induction target and in particular several further induction targets . In particular, this reduces the number of induction targets by at least a number of the combined induction targets minus one, which advantageously allows the control scheme to be simplified. In this way, in particular, advantageous control of the provision of at least one output heating output can be made possible. In particular, the control unit in the special operating state is intended to operate the common induction target, in particular the first and the second induction target with a single heating frequency or with a frequency pair which in particular has two heating frequencies, which have a frequency spacing of at least 17 kHz from one another, and in particular to operate with the same period. In particular, the control scheme has heating frequencies for triggering the induction targets, which enable triggering of the induction targets free of coupling noises, and an output heating power which is averaged over a time interval and which, in particular, is equal to the target heating power. A “further induction target” is to be understood in particular as an induction target which is designed differently from the first and second induction target and / or common induction target and / or is operated independently of the first and second induction target and / or common induction target.

It is also proposed that the control unit in the special operating state be provided to operate the common induction target periodically with a period. This enables flexible heating output control. A “period duration” is to be understood in particular as a shortest time period of an activation sequence of a control scheme, the shortest time period being repeated periodically over an entire operating time of a cooking process. In particular, the induction target is activated during the period, wherein the induction target can be supplied with electrical energy, wherein the electrical energy can be negligible.

In addition, it is proposed that the control unit in the special operating state be provided for dividing the period into a number of partial time ranges, which corresponds to a resulting number of induction targets, in particular a number of common and further induction targets. In this way, in particular a reduction in the amount of calculation for determining at least one control scheme can be achieved. This allows, in particular, an advantageous control of at least one output heating output. The induction target is preferably supplied with a constant electrical output heating power in each partial time range. “Time subrange” is to be understood in particular as a time span whose duration is longer than 0 s and shorter than or equal to the period. In particular, at least one parameter, for example a duration of the partial time range and / or an operating parameter for the common and / or further induction target, for example a heating frequency and / or an output heating power, can be set in each partial time range by the control unit and in particular different from parameters of further partial time ranges and / or independently.

Furthermore, it is proposed that the control unit in the special operating state be provided to operate at least one of the induction targets, in particular one of the common and further induction targets, with a power surplus above the respective average output heating power in each time subrange. In this way, in particular, simplified control of the induction targets can be achieved. In particular, the control unit controls the output heating power of each induction target in each partial time range in such a way that a total output heating power is at least substantially constant over all partial time ranges. In this context, “at least essentially” is to be understood in particular to mean that a deviation from a predetermined value is in particular less than 15%, preferably less than 10% and particularly preferably less than 5% of the predetermined value. A “total output heating output” is to be understood in particular as a sum of the output heating outputs of all common and further induction targets at a specific point in time, in particular a period. In particular, the control unit is provided in the special operating state to operate an induction target that is temporally subsequent in a time subrange from an induction target operated in the time subrange with an excess power. In particular, the control unit is provided in the special operating state for only once with the excess power when there is an equal number of induction targets and the partial time ranges of each induction target a period to operate. The excess power can be adjusted in particular by a suitable choice of heating frequencies. A “power surplus” is to be understood in particular as a heating power whose average value exceeds an average output heating power in relation to a time interval. In particular, the excess power can be achieved by applying an alternating electromagnetic field with a heating frequency that differs from a target heating frequency, a target heating power required and / or set by the operator being provided when the induction target is operated with the target heating frequency. In particular, the excess power can be achieved when the cooktop device is operated in a ZVS mode with a heating frequency which is lower than the target heating frequency. In particular, the excess power can be achieved when the cooktop device is operated in a ZCS mode with a heating frequency which is higher than the target heating frequency. A “ZVS mode” is to be understood in particular as a zero-voltage switching mode in which a voltage with a value of approximately zero is present when a switch is switched.

It is further proposed that the control unit in the special operating state select the frequency spacing, in particular for all heating frequencies with which the first and / or second induction target are operated, at least constant for the period. In particular, the frequency spacing is at least 17 kHz. In this way, in particular a reduced complexity of controlling output heating powers can be made possible. In particular, the second heating frequency shifts by a same value when the first heating frequency is varied, in particular during a period, so that the frequency spacing remains constant.

It is also proposed that the control unit be provided to take into account at least one duty cycle when checking the tolerance condition. In particular, this enables precise control of output heating powers. In particular, the control unit can reduce the duty cycle for reaching a specific output heating power in order to be able to operate an induction target with a lower heating frequency and advantageously to achieve the specific output heating power at the same time. In particular, the control unit can increase the duty cycle in order to achieve a specific output heating power of an induction target at a higher heating frequency with which the induction target is operated. In particular, the heating frequency is a monotonically falling function of the duty cycle.

It is conceivable that the cooking appliance device has a position detection unit for detecting a position of the induction target, in particular the common induction targets and in particular the further induction targets. In this way, a precise, in particular temporal and / or spatial activation of inductors can be achieved, as a result of which a targeted energy supply can take place. In particular, the position detection unit provides the control unit with at least one signal, which the control unit evaluates and determines whether a case of at least one cookware occurs. The position can in particular be detectable by means of a camera, which can be part of the position detection unit. In particular, the position detection unit can determine an absolute and / or relative position of the induction target, in particular of the common induction targets. In particular, the position detection unit can determine an extent of the respective induction target. The positions can be determinable, for example, by determining coordinates and / or by determining a position relative to a reference point and / or surface.

In addition, a cooking device, in particular a hob, is proposed with at least one cooking device device according to the invention, as a result of which, in particular, low-noise operation and advantageously simplified control of the induction targets can take place.

The invention is also based on a method for operating a cooking device device according to the invention, in particular a cooktop device, in which at least one first induction target and at least one second induction target are in particular defined and supplied with electrical energy.

It is proposed that, if there is at least one tolerance condition between the first induction target and the second induction target, a transition is made to at least one special operating state in which the first induction target and the second induction target are combined to form a common induction target and a first heating frequency for controlling the first induction target and a second heating frequency for controlling the second induction target can be coordinated with one another.

The cooking device device should not be limited to the application and embodiment described above. In particular, the cooking appliance device can have a number that differs from a number of individual elements, components and units specified here in order to fulfill a function described here.

Further advantages result from the following description of the drawing. Four exemplary embodiments of the invention are shown in the drawing. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.

• 1 ein Kochfeld mit einer Gargerätevorrichtung,
• 2 die Gargerätevorrichtung mit einer beispielhaften ersten Induktionszielanordnung mit drei Induktionszielen, wobei zwei Induktionsziele zusammengefasst sind zu einem gemeinsamen Induktionsziel in einer schematischen Draufsicht,
• 3 Leistungskurven der drei Induktionsziele, mit einer eingezeichneten gemeinsamen Heizfrequenz f_AB des gemeinsamen Induktionsziels,
• 4 ein erstes beispielhaftes Steuerungsschema des gemeinsamen Induktionsziels und eines weiteren Induktionsziels der ersten Induktionszielanordnung,
• 5 ein zweites beispielhaftes Steuerungsschema des gemeinsamen Induktionsziels und des weiteren Induktionsziels der ersten Induktionszielanordnung,
• 6 die Gargerätevorrichtung mit einer beispielhaften zweiten Induktionszielanordnung mit drei Induktionszielen, wobei zwei Induktionsziele zusammengefasst sind zu einem gemeinsamen Induktionsziel in einer schematischen Draufsicht,
• 7 Leistungskurven der drei Induktionsziele, mit einer eingezeichneten gemeinsamen Heizfrequenz f_AB des gemeinsamen Induktionsziel 32, wobei die Sollheizfrequenzen der zusammengefassten Induktionsziele einen Frequenzabstand von zumindest 17 kHz aufweisen,
• 8 ein erstes beispielhaftes Steuerungsschema des gemeinsamen Induktionsziels und eines weiteren Induktionsziels der zweiten Induktionszielanordnung,
• 9 ein zweites beispielhaftes Steuerungsschema des gemeinsamen Induktionsziels und des weiteren Induktionsziels der zweiten Induktionszielanordnung,
• 10 ein weiteres Kochfeld mit einer Gargerätevorrichtung mit einer beispielhaften dritten Induktionszielanordnung mit vier Induktionszielen, wobei zwei Induktionsziele zusammengefasst sind zu einem gemeinsamen Induktionsziel in einer schematischen Draufsicht,
• 11 Leistungskurven der vier Induktionsziele mit einer eingezeichneten gemeinsamen Heizfrequenz f_CD des gemeinsamen Induktionsziels,
• 12 ein beispielhaftes Steuerungsschema des gemeinsamen Induktionsziels und zwei weiteren Induktionsziele der dritten Induktionszielanordnung,
• 13 ein weiteres, als klassisches Kochfeld ausgebildetes Kochfeld mit einer Gargerätevorrichtung mit einer vierten Induktionszielanordnung mit fünf Induktionszielen in einer schematischen Draufsicht,
• 14 ein weiteres, als Matrixkochfeld ausgebildetes Kochfeld mit einer Gargerätevorrichtung mit der vierten Induktionszielanordnung mit fünf Induktionszielen in einer schematischen Draufsicht,
• 15 Leistungskurven der fünf Induktionsziele am Beispiel des als Matrixkochfels ausgebildetes Kochfeld, von denen zwei als gemeinsames und drei als weiteres gemeinsames Induktionsziel zusammengefasst sind mit einer eingezeichneten Heizfrequenz f_AB des gemeinsamen Induktionsziels und mit einer eingezeichneten Heizfrequenz f_CDE des weiteren gemeinsamen Induktionsziels,
• 16 ein erstes beispielhaftes Steuerungsschema des gemeinsamen und des weiteren gemeinsamen Induktionsziels der vierten Induktionszielanordnung,
• 17 ein zweites beispielhaftes Steuerungsschema des gemeinsamen und des weiteren gemeinsamen Induktionsziels der vierten Induktionszielanordnung,
• 18 das weitere, als Matrixkochfeld ausgebildetes Kochfeld mit der Gargerätevorrichtung mit einer fünften Induktionszielanordnung mit fünf Induktionszielen in einer schematischen Draufsicht,
• 19 die Leistungskurven der fünf Induktionsziele, von denen vier als gemeinsames Induktionsziel zusammengefasst sind,
• 20 ein erstes beispielhaftes Steuerungsschema des gemeinsamen und eines weiteren Induktionsziels der fünften Induktionszielanordnung,
• 21 ein zweites beispielhaftes Steuerungsschema des gemeinsamen und des weiteren Induktionsziels der fünften Induktionszielanordnung,
• 22 Leistungskurven eines Induktionsziels bei drei verschiedenen Tastgraden,
• 23 eine beispielhafte Darstellung eines zulässigen Frequenzintervalls, in welchem eine Auswahl von geeigneten Heizfrequenzen bei dem Frequenzabstand von 0 kHz auswählbar ist und
• 24 eine beispielhafte Darstellung eines zulässigen Frequenzintervalls, in welchem eine Auswahl von geeigneten Heizfrequenzen bei dem Frequenzabstand von zumindest 17 kHz auswählbar ist.

Show it:

• 1 a hob with a cooking device,
• 2nd the cooking appliance device with an exemplary first induction target arrangement with three induction targets, two induction targets being combined to form a common induction target in a schematic plan view,
• 3rd Power curves of the three induction targets, with a common heating frequency shown f _AB the common induction target,
• 4th a first exemplary control scheme of the common induction target and a further induction target of the first induction target arrangement,
• 5 a second exemplary control scheme of the common induction target and the further induction target of the first induction target arrangement,
• 6 the cooking device with an exemplary second induction target arrangement with three induction targets, two induction targets being combined to form a common induction target in a schematic plan view,
• 7 Power curves of the three induction targets, with a common heating frequency shown f _AB of the common induction target 32 , the target heating frequencies of the combined induction targets having a frequency spacing of at least 17 kHz,
• 8th a first exemplary control scheme of the common induction target and a further induction target of the second induction target arrangement,
• 9 a second exemplary control scheme of the common induction target and the further induction target of the second induction target arrangement,
• 10th another hob with a cooking device device with an exemplary third induction target arrangement with four induction targets, two induction targets being combined to form a common induction target in a schematic plan view,
• 11 Power curves of the four induction targets with a drawn common heating frequency f _CD the common induction target,
• 12th an exemplary control scheme of the common induction target and two further induction targets of the third induction target arrangement,
• 13 a further hob designed as a classic hob with a cooking device device with a fourth induction target arrangement with five induction targets in a schematic plan view,
• 14 a further hob designed as a matrix hob with a cooking device device with the fourth induction target arrangement with five induction targets in a schematic plan view,
• 15 Power curves of the five induction targets using the example of the hob designed as a matrix hob, two of which are combined as a common and three as a further common induction target with a heating frequency shown f _AB the common induction target and with a marked heating frequency f _CDE further common induction target,
• 16 a first exemplary control scheme of the common and the further common induction target of the fourth induction target arrangement,
• 17th a second exemplary control scheme of the common and the further common induction target of the fourth induction target arrangement,
• 18th the further, designed as a matrix hob with the cooking device with a fifth induction target arrangement with five induction targets in a schematic plan view,
• 19th the performance curves of the five induction targets, four of which are combined as a common induction target,
• 20th a first exemplary control scheme of the common and a further induction target of the fifth induction target arrangement,
• 21 a second exemplary control scheme of the common and the further induction target of the fifth induction target arrangement,
• 22 Power curves of an induction target at three different duty cycles,
• 23 an exemplary representation of an allowable frequency interval in which a Selection of suitable heating frequencies at the frequency spacing of 0 kHz can be selected and
• 24th an exemplary representation of a permissible frequency interval in which a selection of suitable heating frequencies can be selected at the frequency spacing of at least 17 kHz.

In the figures, only one of multiple objects is provided with a reference symbol.

1 shows one as a hob 38a trained cooking appliance 26a with a cooking device 10a . The cooking device 26a is as an induction hob 40a educated. The cooking device 26a is as a matrix hob 18a educated. The cooking device 10a is designed as an induction hob device.

The cooking device 10a has a stand 42a for at least one cookware 44a on. In the present embodiment, the base plate 42a designed as a cooktop. The stand plate 42a is for setting up cookware 44a intended. The stand plate 42a has a first installation area 48a on. The stand plate 42a has a second installation area 50a on.

The cooking device 10a has a control unit 12a on. The control unit 12a is provided depending on operating parameters entered by an operator, such as a target heating output 78a and / or a cooking time, executing actions and / or algorithms and / or changing settings.

The cooking device 10a has a plurality of first and second inductors 20a , 22a on. The inductors 20a , 22a are arranged in a matrix. The inductors 20a , 22a are in an installed state below the base plate 42a arranged. The first inductors 20a are below the first installation area 48a arranged. The second inductors 22a are below the second installation area 50a arranged. In the present exemplary embodiment, the cooking appliance device has 10a twenty eight first and twenty eight second inductors 20a , 22a on. The inductors 20a , 22a are each provided on the stand 42a over the inductors 20a , 22a set up cookware 44a to heat. Any inductor 20a , 22a has at least one induction coil.

The first inductors 20a are through the control unit 12a can be supplied with electrical energy from a first energy source. The second inductors 22a are through the control unit 12a can be supplied with electrical energy from a second energy source. The first energy source has a first electrical current phase of a power supply network. The second energy source has a second electrical current phase of a power supply network.

The cooking device 10a has a position detection unit 24a on. The position detection unit 24a is designed as a position sensor. The position detection unit 24a is intended to be a respective position on the mounting plate 42a over the inductors 20a , 22a set up cookware 44a capture.

2nd shows the cooking device 10a with an exemplary first induction target arrangement with three induction targets A , B , C. , where two induction targets A , B are combined into a common induction target 32a in a schematic top view.

On the stand 42a are three cookware 44a , 60a , 62a placed. The position detection unit 24a detects a position of the three cookware 44a , 60a , 62a . The position detection unit 24a detects an extent of a floor of the three cookware 44a , 60a , 62a which the stand plate 42a to contact. The position detection unit 24a provides a signal with information about the respective position of the cookware 44a , 60a , 62a for the control unit 12a ready. The control unit 12a evaluates this from the position detection unit 24a provided signal.

It is conceivable that one or more first and / or second inductors 20a , 22a Part of the position detection unit 24a is / are. The inductor 20a , 22a could be, in a known manner, the absence and / or presence of cookware 44a , 60a , 62a over the inductor in question 20a , 22a detect and a signal for the control unit 12a provide.

Based on one on the stand 42a set up cookware 44a , 60a , 62a defines the control unit 12a an induction target. The control unit 12a can define a variety of induction targets. Each induction target comprises at least one inductor and at least part of the dishes. Each induction target can have one or more inductors.

The control unit 12a defines three induction targets A , B and C. . The control unit 12a defines the induction target A based on that on the stand plate 42a in the first installation area 48a first cookware set up 44a , which has several first inductors 20a covered. The control unit 12a supplies the induction target A with electrical energy from a first energy source.

The control unit 12a defines the induction target B based on that on the stand plate 42a in the first and second installation area 48a , 50a set up second cookware 60a , which has at least several first and second inductors 20a , 22a covered. The control unit 12a supplies the induction target B with electrical energy from the first and a second energy source.

The control unit 12a defines the induction target C. based on that on the stand plate 42a in the second installation area 50a third cookware set up 62a , which has at least several second inductors 22a covered. The control unit 12a supplies the induction target C. with electrical energy from the second energy source.

Assume that the control unit 12a the induction target A as the first induction target 14a , the induction target B as a second induction target 16a and the induction target C. as another induction target 34a Are defined.

The first energy source has a first electrical current phase of a power supply network. The second energy source has a second electrical current phase of a power supply network. The cooking device 10a has a first inverter unit which is part of the first energy source. The first electrical current phase of the power supply network supplies the first inverter unit with electrical energy. The cooking device 10a has a second inverter unit which is part of the second energy source. The second electrical current phase of the power supply network supplies the second inverter unit with electrical energy. The first and / or second inverter unit each have at least one inverter for providing at least one respective heating frequency for the first and / or second and / or further induction targets 14a , 16a , 34a on.

3rd shows performance curves of the three induction targets A , B , C. , with a common heating frequency shown f _AB of the common induction target 32a , with a target heating output 78a is plotted against a heating frequency. The respective target heating output 78a P _TA , P _TB , P _TC can be set by an operator.

The control unit controls in a normal operating state 12a the respective induction target 14a , 16a , 32a with a respective target heating frequency f _TA , f _TB , f _TC . at. The respective target heating frequency f _TA , f _TB , f _TC delivers the respective target heating output 78a P _TA , P _TB , P _TC .

The control unit 12a checks for a tolerance condition between the first induction target 14a and the second induction target 16 . The control unit 12a Checks whether two or more induction targets operate at an average heating output when operating at a common heating frequency 36a in continuous operation, deliver a maximum deviation from a respective target heating output 78a has within a tolerance interval. The tolerance range allows a maximum deviation of the average output heating output 36a with continuous operation of 5% above the target heating output 78a . The tolerance range allows a maximum deviation of 10% below the target heating output 78a .

The control unit 12a takes a duty cycle into account when checking the tolerance condition 56a . If an induction target, which the control unit 12a controlled with a heating frequency f ₁ , a required heating power P * cannot deliver without violating the tolerance condition, the control unit varies 12a the duty cycle 56a (see. 22 ). By lowering the duty cycle 56a D1 , which has a value of 0.5, to a further duty cycle 56a D2 , D3 with a smaller value below 0.5, a new heating frequency can be f ₂ , f ₃ with a smaller value f ₃ <f ₂ <f ₁ than the heating frequency, the required heating output P * deliver. This results in flexibility in the selection of suitable heating frequencies, taking the tolerance condition into account.

The control unit 12a chooses for the first induction target 14a and the second induction target 16a a common heating frequency f _TA out.

The control unit 12a checks how big a first frequency interval 52a is in which the first heating frequency is the average output heating power 36a with continuous operation of the first induction target 14a delivers within the tolerance interval of +15% / - 15% (cf. 23 ). The control unit 12a checks how big a second frequency interval 54a is in which the second heating frequency is the average output heating power 36a with continuous operation of the second induction target 16a within the tolerance interval of +15% / - 15%, preferably +5% / -10%. The control unit 12a checks whether the first frequency interval 52a and the second frequency interval 54a overlap.

In the event that the frequency intervals 52a , 54a cut and the deviation of the average output heating power 36a of the first and second induction target 14a , 16a with continuous operation within the tolerance interval, the control unit goes 12a into a special operating state.

The control unit holds in the special operating state 12a the first induction target 14a and the second induction target 16a to a common induction goal 32a together. The control unit is correct in the special operating state 12a a first heating frequency for controlling the first induction target 14a and a second heating frequency for driving the second induction target 16a on each other. The control unit selects in the special operating state 12a the first heating frequency for controlling the first induction target 14a and the second heating frequency for controlling the second induction target 16a with a mutual frequency spacing 46a from 0 kHz. The control unit selects in the specific operating state 12a the common heating frequency f _TAB to control the first induction target 14a and the second heating frequency for controlling the second induction target 16a .

The common heating frequency f _TAB lies between the target heating frequency f _TA and the target heating frequency f _TB .

The control unit 12a is intended to carry out a method in which the first induction target 14a and the second induction target 16a are defined and supplied with electrical energy if there is at least one tolerance condition between the first induction target 14a and the second induction target 16a is transitioned to the special operating state in which the first induction target 14a and the second induction target 16a to a common induction goal 32a are summarized and a first heating frequency for controlling the first induction target 14a and a second heating frequency for driving the second induction target 16a be coordinated.

The control unit determines in the special operating state 12a a control scheme for controlling the two induction targets 14a , 16a and the further induction target 34a .

4th shows a first exemplary control scheme of the common induction target 32a and another induction target 34a the first induction target arrangement.

The first exemplary control scheme shows for the common and further induction target 32a , 34a an output heating power plotted over time 68a .

Assume the control unit 12a defines the first induction target 14a and the second induction target 16a as an induction target, namely as a common induction target 32a . The control unit handles in the special operating state 12a the common induction target 32a in determining the control scheme as a single induction target.

The control unit 12a is for periodic supply of the common induction target 32a and the further induction target 34a intended.

The control unit 12a operates the induction targets 32a , 34a each period over an entire cooking period periodically 28a . The cooking time is in period 28a divided (cf. 4th ). During the period 28a powers the control unit 12a the induction targets 32a , 34a with a respective average output heating output 36a .

The control unit operates in a special operating state 12a the common and the further induction goal 32a , 34a avoiding flicker. To avoid flicker, the control unit stops 12a a total output heating power of the common and further induction target in the special operating state 32a , 34a at least in most of a period 28a essentially constant.

The control unit 12a operates the common and further induction target in the special operating state 32a , 34a while avoiding coupling noises. In the special operating state, the control unit reduces 12a Coupling noises through a special control of the common induction target 32a .

The period 28a is in partial time areas 30a divided. The control unit 12a divides the period into the special operating state 28a in two partitions 30a t ₁ , t ₂ . A number of time subranges 30a corresponds to a resulting number of a sum of the further induction targets 34a and common induction goals 32a . A sum of the respective duration of the time subranges 30a t1 , t2 corresponds to the period 28a .

The control unit 12a operates in the special operating state in the first partial time range 30a t ₁ the common induction target 32a and the further induction target 34a with the same heating frequency. The control unit 12a operates in the special operating state in the first partial time range 30a t ₁ the further induction target 34a with one above the average output heating power 36a the further induction target 34a excess performance.

In the second part of the time 30a t ₂ operates the control unit 12a the common induction target 32a and the further induction target 34a at the same time with heating frequencies that differ by at least 17 kHz. The control unit 12a operates in the special operating state in the second partial time range 30a t ₂ the common induction target 32a with one above average Output heating power 36a of the common induction target 32a excess performance.

In addition, the control unit 12a To avoid coupling noises in the special operating state, select a control option from a catalog of control options. For example, the control unit 12a the common induction target in the special operating state to avoid coupling noises 32a and the further induction target 34a operate at least essentially with a substantially the same heating frequency. This is in the figures, especially in 4th , 5 , 7 , 8th , 11 , 15 , 16 , 18th and 19th characterized by diagonally dash-dotted and vertical hatching.

Alternatively or additionally, the control unit could 12a the common induction target in the special operating state to avoid coupling noises 32a and the further induction target 34a operate with heating frequencies that differ by at least 17 kHz. This is in the figures, especially in 4th , 7 , 11 , 15 and 18th characterized by an oblique dashed hatching.

For example, the control unit 12a alternatively or additionally in the special operating state to avoid coupling noises at least part of the common induction target 32a and the further induction target 34a disable and at least part of the common induction target 32a and the further induction target 34a operate with a certain heating frequency. This is particularly evident in the figures 5 , 8th , 16 and 19th characterized by checkered hatching.

The example in 4th The control scheme shown fulfills the requirements of the flicker standard and the avoidance of coupling noises.

Over the period 28a averaged, provides the common induction target 32a and the further induction target 34a each an average output heating output 36a P _TAB , P _TC .

5 shows a second exemplary control scheme of the common induction target 32a and the further induction target 34a the first induction target arrangement. The following description is essentially limited to the differences between the control schemes, with the features and functions remaining the same as the description of the control scheme 4th can be referred.

The control unit 12a operates in the special operating state in the first partial time range 30a t ₁ the common induction target 32a and the further induction target 34a with the same heating frequency. The control unit 12a operates in the first part of time 30a t ₁ the further induction target 34a with one above the average output heating power 36a the further induction target 34a excess performance.

In the second part of the time 30a t ₂ operates the control unit 12a the common induction target 32a with an excess power and deactivates the further induction target 34a .

6 shows the cooking device 10a with an exemplary second induction target arrangement with three induction targets A , B , C. , where two induction targets A , C. are combined into a common induction target 32a in a schematic top view

7 shows performance curves of the three induction targets A , B , C. with a common heating frequency shown f _AB of the common induction target 32a , where the target heating frequencies of the combined induction targets A , C. a frequency separation 46a of at least 17 kHz.

The control unit 12a defines three induction targets A , B and C. . Assume that the control unit 12a the induction target A as the first induction target 14a , the induction target C. as a second induction target 16a and the induction target B as another induction target 34a Are defined.

In the event that the target heating frequencies of the first and second induction target 14a , 16a differ by more than 17 kHz and that the target heating power 78a f _TA of the first induction target 14a and the target heating output 78a f _TB of the third induction target 16a have a large percentage distance, the frequency intervals 52a , 54a the control unit does not intersect 12a into a special operating state. The control unit holds in the special operating state 12a the first induction target 14a and the second induction target 16a to a common induction goal 32a together. The control unit is correct in the special operating state 12a a first heating frequency for controlling the first induction target 14a and a second heating frequency for driving the second induction target 16a on each other. The control unit puts in the special operating state 12a the mutual frequency spacing 46a between the first heating frequency for controlling the first induction target 14a and the second heating frequency for controlling the second induction target 16a firmly. The frequency separation 46a is for the period 28a constant. The second heating frequency is automatically set by selecting the first heating frequency.

The control unit 12a checks how big the first frequency interval 52a is in which the first heating frequency is the average output heating power 36a with continuous operation of the first induction target 14a delivers within the tolerance interval of +15% / - 15% (cf. 24th ). The control unit 12a checks how big a second frequency interval 54a is in which the second heating frequency is the average output heating power 36a with continuous operation of the second induction target 16a delivers within the tolerance interval of +15% / -15%, preferably +5% / -10%.

The control unit 12a can at the constant frequency spacing 46a the first and / or second heating frequency vary as long as they meet the tolerance condition (cf. 21 ).

The first heating frequency can have a maximum value f ⁺ _TA assume from which the average output heating output 36a of the first induction target 14a the corresponding target heating output 78a of the first induction target 14a by 5%. The second heating frequency can have a maximum value f ⁺ _TB assume from which the average output heating output 36a of the second induction target 16a the corresponding target heating output 78a of the second induction target 16a by 5%.

The first heating frequency can have a minimum value f ^- _TA assume from which the average output heating output 36a of the first induction target 14a the corresponding target heating output 78a of the first induction target 14a falls below 10%. The second heating frequency can have a minimum value f ^- _TB assume from which the average output heating output 36a of the second induction target 16a the corresponding target heating output 78a of the second induction target 16a falls below 10%.

8th and 9 each show a first and second exemplary control scheme of the common induction target 32a and the further induction target 34a the second induction target arrangement, the first heating frequency of the first induction target 14a and the second heating frequency of the second induction target 16a a constant frequency separation 46a exhibit.

The following description is essentially limited to the differences between the control schemes, with the features and functions remaining the same as the descriptions of the control schemes 4th and 5 can be referred.

Suppose the control unit 12a defines the induction target A as the first induction target 14a and the induction target C. as a second induction target 16a together as an induction target namely as a common induction target 32a . The control unit handles in the special operating state 12a the common induction target 32a in determining the control scheme as a single induction target.

The control unit 12a operates in the special operating state in the first partial time range 30a t ₁ of the 8th and 9 the common induction target 32a and the further induction target 34a each with the same heating frequency. The control unit 12a operates in the first part of time 30a t ₁ the further induction target 34a with one above the average output heating power 36a the further induction target 34a excess performance.

In the second part of the time 30a t ₂ of in 8th The first control scheme shown operates the control unit 12a the common induction target 32a and the further induction target 34a at the same time with heating frequencies that differ by at least 17 kHz. The control unit 12a operates in the special operating state in the second partial time range 30a t ₂ the common induction target 32a with one above the average output heating power 36a of the common induction target 32a excess performance.

In the second part of the time 30a t ₂ of in 9 The second control scheme shown operates the control unit 12a the common induction target 32a with an excess power and deactivates the further induction target 34a .

The heating frequencies of the first and second induction target 14a , 16a point in every time period 30a the period 28a a constant, from the control unit 12a fixed frequency spacing 46a on.

In 10th to 21 further exemplary embodiments of the invention are shown. The following descriptions are essentially limited to the differences between the exemplary embodiments, with the components, features and functions remaining the same as in the description of the first exemplary embodiment 1 to 9 can be referred. To distinguish the exemplary embodiments is the letter a in the reference numerals of the embodiment in the 1 to 8th through the letters b , c and d are replaced in the following exemplary embodiments.

10th shows another hob 38b with a cooking device 10b with an exemplary third induction target arrangement with four Induction goals A , B , C. , D , where two induction targets C. , D are combined into a common induction target 32b in a schematic top view.

The first installation area 48b has five first inductors 20b on. The second installation area 50b has five second inductors 22b on. The inductors 20b , 22b each have an essentially rectangular contour.

By placing a cookware 44b , 60b , 62b , 64b over one or more inductors 20b , 22b or part of the inductor 20b , 22b , the part in particular at least 10% of a total expansion of the inductor 20b , 22b is the inductors 20b , 22b through the cookware 44b , 60b , 62b , 64b busy. The control unit 12b activates the occupied inductors 20b , 22b .

The control unit 12b defines the one or more by the cookware 44b , 60b , 62b , 64b occupied inductors 20b , 22b together with the respective cookware 44b , 60b , 62b , 64b to an induction target. Overall, through the control unit 12b four induction targets A , B , C. , D Are defined.

The induction goals A , B and D each have two inductors 20b , 22b on and on over the respective inductors 20b , 22b placed first, second and fourth cookware 44b , 60b , 64b on. The induction target C. has four inductors 20b , 22b and one over the inductors 20b , 22b placed third cookware 62b on.

Assume that the control unit 12b Performance curves of the induction targets A , B , C. , D checks for the existence of the tolerance condition and then the induction target C. as the first induction target 14b , the induction target D as a second induction target 16b and the induction targets A , B as further induction goals 34b , 58b Are defined.

The control unit 12b is a first heating frequency to control the first induction target 14b and a second heating frequency for driving the second induction target 16b in such a way that a mutual frequency spacing 46b of 0 kHz arises.

The control unit 12b defines the first induction target 14b and the second induction target 16b as an induction target, namely as a common induction target 32b . The control unit handles in the special operating state 12b the common induction target 32b in determining the control scheme as a single induction target.

The control unit 12b controls the first induction target 14b and the second induction target 16b and thus the common induction target 32b with the same heating frequency f _CD on (cf. 11 ).

12th shows an exemplary control scheme of the common induction target 32b and two other induction targets 34b , 58b the third induction target arrangement. The control unit 12b divides the period 28b in three time periods 30b t ₁ , t ₂ , t ₃ . The control unit 12b operates in the first part of time 30b t ₁ the common induction target 32b and the other induction targets 34b , 58b together with the same heating frequency.

The control unit 12b operates in the second part of the time 30b t ₂ all induction targets 32b , 34b , 58b at the same time, the control unit 12b the further induction target 34b and the common induction target 32b with the same heating frequency and the further induction target 58b operates with a further heating frequency, which differ by at least 17 kHz.

The control unit 12b operates in the third part of the time 30b t ₃ the further induction target 34b and the common induction target 32b simultaneously with heating frequencies that differ by at least 17 kHz, and deactivates the further induction target 58b .

Over the period 28b averaged, deliver the common induction target 32b and the other induction targets 34b , 58b each an average output heating output 36b PT _CD , P _TA , P _TB .

13 shows another cooktop designed as a classic cooktop 38c , with a cooking device 10c with a fourth induction target arrangement with five induction targets A , B , C. , D , E in a schematic top view.

14 shows another, as a matrix hob 18d trained cooktop 38d with a cooking device 10d with the fourth induction target arrangement with five induction targets A , B , C. , D , E in a schematic top view.

The following description is for the classic hob with defined cooking zones as well as for the matrix hob 18d , what a 14 shown is valid. The invention is illustrated below using the example of the matrix hob 18d explained.

The control unit 12d defines the one or more by the cookware 44d , 60d , 62d , 64d , 66d occupied inductors 20d , 22d together with the respective cookware 44d , 60d , 62d , 64d , 66d each to an induction target. Overall, through the control unit 12d five induction targets A , B , C. , D , E . Are defined.

Assume that the control unit 12d Performance curves of the induction targets A , B , C. , D , E checks for the existence of the tolerance condition and then the induction target A as the first induction target 14d , the induction target B as a second induction target 16d and the induction target C. as another first induction target 72d , the induction target D as another second induction target 74d , the induction target E as a third induction target 70d Are defined.

The control unit 12d is a first heating frequency to control the first induction target 14d and a second heating frequency for driving the second induction target 16d in such a way that a mutual frequency spacing 46d of 0 kHz arises.

The control unit 12d defines the first induction target 14d and the second induction target 16d as an induction target, namely as a common induction target 32d . The control unit handles in the special operating state 12d the common induction target 32d in determining the control scheme as a single induction target.

The control unit 12d controls the first induction target 14d and the second induction target 16d and thus the common induction target 32d with the same heating frequency f _AB on (cf. 15 ).

The control unit 12d agrees another first heating frequency for controlling the further first induction target 72d , a further second heating frequency for controlling the further second induction target 74d and a third heating frequency for driving the third induction target 70d in such a way that a mutual frequency spacing 46d of 0 kHz arises.

The control unit 12d defines the further first induction target 72d , the further second induction target 74d and the third induction target 70d as an induction target, namely as another common induction target 76d . The control unit handles in the special operating state 12d the further common induction target 76d in determining the control scheme as a single induction target.

The control unit 12d controls the further first induction target 72d , the further second induction target 74d and the third induction target 70d and thus the further common induction target 76d with the same heating frequency f _CDE on (cf. 15 ).

16 and 17th each show a first and second exemplary control scheme of the common induction target 32d and the further common induction target 76d the fourth induction target arrangement.

The control unit 12d divides the period 28d in two partitions 30d t ₁ , t ₂ . The control unit 12d operates in the first part of time 30d t ₁ of the first and second control schemes the common induction target 32d and the further common induction target 76d together with the same heating frequency. The control unit 12d operates in the first part of time 30d t ₁ the common induction target 32d with one above the average output heating power 36d of the common induction target 32d excess performance.

The control unit 12d operates in the second part of the time 30d t ₂ of the first control scheme the common induction target 32d and the further common induction target 76d at the same time with heating frequencies that differ by at least 17 kHz.

The control unit 12d operates in the second part of the time 30d t ₂ of the second control scheme the common induction target 32d with an excess power and deactivates the further common induction target 76d .

Over the period 28d averaged, provides the common induction target 32d and the further common induction target 76d each an average output heating output 36d P _TAB , P _TCDE .

18th shows the matrix hob 18d with the cooking device 10d with a fifth induction target arrangement with five induction targets A , B , C. , D , E in a schematic top view

The control unit 12d defines the induction target B as another induction target 34d .

The control unit 12d summarizes the induction goals C. , D , E as already to 12th and 13 described to another common induction target 76d together and determined for the further common induction goal 76d a heating frequency f _CDE (see. 19th ).

The control unit 12d defines the induction target A to a first induction target 14d . A target heating frequency of the first induction target 14d and the heating frequency f _CDE further common induction target 76d have a frequency separation 46d of at least 17 kHz. A target heating output 78d f _TA of the first induction target 14d and the target heating output 78d f _TCDE further common induction target 76d have a large percentage distance, the frequency intervals 52d , 54d do not cut (cf. 21 ).

The control unit 12d defines the further common induction target 76d as a new second induction target 16d . The control unit 12d sums it up first induction target 14d and the new second induction target 16d to a common induction goal 32d together.

20th and 21 each show a first and second exemplary control scheme of the common induction target 32d and the further induction target 34d the fifth induction target arrangement.

The control unit 12d divides the period in the first and second control schemes 28d in two partitions 30d t ₁ , t ₂ . The control unit 12d operates in the first part of time 30d t ₁ of the first and second control schemes the common induction target 32d and the further induction target 34d together with the same heating frequency. The control unit 12d operates in the first part of time 30d t ₁ the further induction target 34d with one above the average output heating power 36d the further induction target 34d excess performance.

The control unit 12d operates in the second part of the time 30d t ₂ of the first control scheme the common induction target 32d and the further induction target 34d at the same time with heating frequencies that differ by at least 17 kHz.

The control unit 12d operates in the second part of the time 30d t ₂ of the second control scheme the common induction target 32d with an excess power and deactivates the further induction target 34d .

Over the period 28d averaged, provides the common induction target 32d and the further induction target 34d each an average output heating output 36d P _TACDE , P _TB .

Reference list

10th

Cooking device

12th

Control unit

14

first induction target

16

second induction target

18th

Matrix hob

20th

first inductor

22

second inductor

24th

Position detection unit

26

Cooking appliance

28

Period duration

30th

Partial time range

32

common induction target

34

another induction target

36

average output heating power

38

Cooktop

40

Induction hob

42

Stand

44

first cookware

46

Frequency spacing

48

first installation area

50

second installation area

52

first frequency interval

54

second frequency interval

56

Duty cycle

58

another induction target

60

second cookware

62

third cookware

64

fourth cookware

66

fifth cookware

68

Output heating power

70

third induction target

72

another first induction target

74

another second induction target

76

another common induction target

78

Target heating output

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 1951003 B1 [0002]
• US 7910865 B2 [0002]

Non-patent literature cited

• DIN EN 61000-3-3 [0006]

Claims (14)

Cooking appliance device (10), in particular cooktop device, with a control unit (12), which is provided for controlling and supplying energy to at least one first induction target (14) and at least one second induction target (16), characterized in that the control unit (12) is provided for this purpose If at least one tolerance condition exists between the first induction target (14) and the second induction target (16), the transition to at least one special operating state, in which the control unit (12) is provided, the first induction target (14) and the second induction target ( 16) to form a common induction target (32) and to coordinate a first heating frequency for controlling the first induction target (14) and a second heating frequency for controlling the second induction target (16). Cooking appliance device (10) after Claim 1 , characterized in that the tolerance condition is a condition for a maximum deviation of a respective average output heating power (36) of the two induction targets (14, 16) during continuous operation with the respective heating frequency from a respective target heating power of the induction targets (14, 16). Cooking appliance device (10) after Claim 2 , characterized in that, according to the tolerance condition, the maximum deviation lies in a tolerance interval of +15% / -15%, preferably +5% / -10%. Cooking appliance device (10) according to one of the preceding claims, characterized in that the control unit (12) in the special operating state and in particular depending on the situation selects the first heating frequency and the second heating frequency with a mutual frequency spacing (46) of 0 kHz. Cooking appliance device (10) according to one of the preceding claims, characterized in that the control unit (12) selects the first heating frequency and the second heating frequency with a mutual frequency spacing (46) of at least 17 kHz in the special operating state and in particular depending on the situation. Cooking appliance device (10) according to Claims 4 and 5 , characterized in that the control unit (12) in the special operating state selects the frequency spacing (46) as a function of selected target powers for the two induction targets (14, 16). Cooking appliance device (10) according to one of the preceding claims, characterized in that the control unit (12) is provided in the special operating state for the purpose of determining the common induction target (32) when determining at least one control scheme for controlling the two induction targets (14, 16) and treat at least one further induction target (34) as a single induction target. Cooking appliance device (10) according to one of the preceding claims, characterized in that the control unit (12) is provided in the special operating state for periodically operating the common induction target (32) with a period (28). Cooking appliance device (10) according to Claims 7 and 8th , characterized in that the control unit (12) is provided in the special operating state for dividing the period (28) into a number of partial time areas (30) which corresponds to a resulting number of induction targets, in particular a number of common and further induction targets . Cooking appliance device (10) after Claim 9 , characterized in that the control unit (12) is provided in the special operating state to in each time subrange (30) at least one of the induction targets, in particular a number of common and further induction targets, with a power surplus above the respective average output heating power (36) operate. Cooking appliance device (10) at least according to Claims 4 , 5 and 8th , characterized in that the control unit (12) in the special operating state selects the frequency spacing (46) constant at least for the period (28). Cooking appliance device (10) according to one of the preceding claims, characterized in that the control unit (12) is provided to take into account at least one duty cycle when checking the tolerance condition. Cooking appliance (26), in particular hob (38), with at least one cooking appliance device (10) according to one of the preceding claims. Method for operating a cooking device device (10), in particular a cooktop device, in particular according to one of the Claims 1 to 12th , in which at least one first induction target (14) and at least one second induction target (16) are supplied with electrical energy, characterized in that when there is at least one tolerance condition between the first induction target (14) and the second induction target (16) is switched to at least one special operating state in which the first induction target (14) and the second induction target (16) are combined to form a common induction target (32) and a first heating frequency for controlling the first Induction target (14) and a second heating frequency to control the second induction target (16) are coordinated.

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