Induction hob device and induction hob

Abstract

In order to improve the cost efficiency and heating efficiency of a structure, an induction hob device (10a) is proposed, having at least one induction unit (12a, 12e) which has at least two annular winding portions (14a, 16a;14e, 16e, 18e) which are arranged concentrically with respect to one another, at least one operator interface (20a; 20b; 20c; 20d), and a control unit (22a) designed to operate the winding portions (14a, 16a;14e, 16e, 18e) with respective heating power densities, which can be variably adjusted relative to one another, in at least one operating state, wherein the heating power densities can be set on the operator interface (20a; 20b; 20c; 20d) on the basis of at least one operator input.

Description

[0001] 202401243

[0002] 1

[0003] Induction hob device and induction hob

[0004] The invention relates to an induction hob device according to claim 1 and an induction hob according to claim 12.

[0005] Paella gas burners are already known in the art, which provide independently adjustable, concentrically arranged heating zones with respect to their heating power. EP 3028537 B1 discloses a cooktop with an inhomogeneous heat distribution, in which heat is drawn from the front of the cooktop to the back. Furthermore, DE 112008000710 B4 discloses a matrix cooktop with adjacent inductors that together can provide an annular partial heating zone arranged around a circular partial heating zone, the partial heating zones being operated at different heating powers.

[0006] The object of the invention is, in particular but not limited to, providing a generic device with improved properties regarding the cost-efficiency and heating efficiency of a structure. This object is achieved according to the invention by the features of claim 1, while advantageous embodiments and further developments of the invention can be found in the dependent claims.

[0007] An induction hob device is proposed, comprising at least one induction unit having at least two concentrically arranged annular winding sections, at least one operator interface and a control unit designed to operate the winding sections in at least one operating state with heating power densities that can be variably adjusted to differ from each other, wherein the heating power densities are adjustable based on at least one operator input at the operator interface.

[0008] Such a design allows for a particularly simple construction, which exhibits exceptionally high heating efficiency and particularly advantageous cost-efficiency. In particular, a number of operated induction coils of an induction cooktop can be used to achieve a desired 202401243

[0009] Two inhomogeneous heat distributions in a heating zone of the induction cooktop can be reduced when heating cookware. Advantageously, a cookware can be heated inductively with particular efficiency according to the desired inhomogeneous heat distribution. In particular, the energy efficiency of the induction cooktop can be increased. For example, when using cookware with empty areas, only the area containing food can be heated. The heat distribution can be adjusted with exceptional precision and / or ease, thereby improving user comfort and cooking results. Furthermore, a particularly space-efficient design can be achieved, the dimensions of which can be adapted with great flexibility.

[0010] An induction cooktop device is understood to mean, in particular, at least a part, especially a sub-assembly, of an induction cooktop, and may also include accessory units for the cooktop, such as a sensor unit for externally measuring the temperature of cookware and / or food being cooked. In particular, the induction cooktop device may also comprise the entire induction cooktop. During operation, especially heating operation, the induction cooktop device is designed to heat at least one cookware item, in particular placed in one of the heating zones assigned to at least one induction unit on a support plate of the induction cooktop device and / or the induction cooktop. The support plate may be designed as a cooktop surface. Alternatively, the support plate may be designed as a kitchen worktop.Preferably, the kitchen worktop, particularly in contrast to the hob, is additionally designed to provide a food preparation area in which, for example, cutting, mixing, pounding, and / or peeling food could be carried out. The induction unit is preferably designed to heat the cooking utensil and is particularly configured as an inductor. Preferably, the induction unit is configured as a double-turn inductor, particularly with exactly two concentrically arranged winding sections, or as a triple-turn inductor, particularly with exactly three concentrically arranged winding sections. The winding sections each provide a partial heating zone on the worktop, which 202401243.

[0011] 3. Together, they form the continuous heating zone provided by the induction unit. The annular winding section has, in particular, the shape of a ring, which in at least one viewing direction has a continuous surface with an empty area in the middle, which is surrounded by the surface. The surface has, in particular, an at least substantially constant width along a circumferential direction of the ring, which is oriented, in particular, parallel to a radial direction of the ring, wherein the width preferably always deviates by less than 25%, more preferably less than 10%, and most preferably less than 5% from a mean width of the ring. The ring, in particular a circumference of the ring, preferably has a round and / or circular shape. Alternatively, the ring can have an at least partially angular shape, for example, with a square circumference or the like.The induction unit comprises at least one inner, in particular an internal, winding section and at least one outer, in particular an external, winding section arranged concentrically around the inner winding section, wherein the inner winding section is preferably arranged in the empty area of ​​the outer winding section. The annular winding section is preferably designed as an induction coil and more preferably as a flat coil. A distance, which is preferably arranged parallel to the radial direction, between an outer winding section and an adjacent inner winding section is preferably less than the width, in particular in the radial direction, of the outer and / or inner winding section.The induction unit, in particular an outermost winding section of the induction unit, can, for example, have a diameter of at least 10 cm, preferably at least 20 cm, more preferably at least 25 cm, and particularly preferably at least 28 cm, and / or of at most 100 cm, preferably at most 80 cm, advantageously at most 50 cm, more preferably at most 40 cm, more preferably at most 35 cm, and most advantageously at most 32 cm. The winding sections can have the same or different wire diameters and / or the same or different number of turns.The induction cooktop device and / or the induction cooktop may have only one induction unit or at least one further induction unit, which may be identical to the induction unit or different from it, for example, having a different number of winding sections and / or different dimensions and / or a different shape. The 202401243.

[0012] 4

[0013] The induction hob device and / or the induction hob may, in addition to at least one induction unit, have at least one single-winding inductor, in particular to provide a classic heating zone with a uniform heat distribution.

[0014] The user interface includes, in particular, at least one input means for at least one user input, by means of which the induction cooktop device, preferably the induction cooktop itself, can be controlled by the user. The input means is designed, in particular, as a control element. The input means can be at least partially mechanical and / or electrical. The input means can be designed as a button and / or switch and / or slider and / or rotary dial, or in another configuration that appears useful to a person skilled in the art. Preferably, the input means is designed as a touch input means, which is integrated into and / or forms part of a touchpad of the user interface. Alternatively, a mechanically movable input means for user input is conceivable.The user interface preferably has at least one output means designed to output at least one piece of information, in particular regarding user input and / or a setting. The output means is preferably designed for display, in particular for visual output, although alternatively or additionally, acoustic and / or haptic output is also conceivable. The user interface preferably has at least one display and / or at least one marker and / or at least one indicator light, which includes the output means and / or is designed as such. The input means and the output means can be designed as the same element and / or as the same area, particularly in an embodiment in which the user interface has at least one touchpad that includes both the input means and the output means. The input means can, in particular, also function as the output means.The term "control unit" shall be understood to mean, in particular, an electronic unit that is preferably at least partially integrated into a control and / or regulating unit of the induction cooktop and that is preferably designed to control and / or regulate at least one inverter unit of the induction cooktop, in particular the induction cooktop device. Preferably, the control unit comprises a processing unit and, in particular, in addition to the processing unit, a storage unit with a 202401243 therein.

[0015] 5. A stored control and / or regulation program, intended to be executed by the processing unit. The control unit is, in particular, electrically and / or electronically connected to the user interface and is preferably designed to process the user input at the user interface into at least one control signal for controlling at least the inverter unit. The inverter unit preferably comprises at least one inverter, which preferably has at least two switching elements, for generating the operating signal for operating a respective winding section. The control unit is, in particular, designed to control the heating power densities of the induction unit, especially a heating power density distribution between the winding sections of the induction unit in the operating state, via the inverter unit.The heating power density is to be understood in particular as a measure of the transfer of thermal energy per unit area of ​​a cooking appliance, especially a standardized one, which is arranged in a heating zone associated with the induction unit. The fact that a winding section is operated with a heating power density is to be understood in particular as meaning that the winding section is operated with a corresponding operating signal, in particular periodic and / or electrical, generated by at least one inverter, to transfer thermal energy per unit area corresponding to the heating power density.The phrase "the heating power densities are variably adjustable" means that the heating power densities can be adjusted differently from one another, whereby the difference between the heating power densities is variably adjustable and, in particular, can be selected discretely from a list of predefined values ​​or quasi-continuously, especially within a predefined value interval. Specifically, the heating power densities of the winding sections can also be variably adjusted differently from one another with respect to non-zero heating power densities. The heating power densities can preferably be selected from a set of at least three, preferably at least five, preferably at least eight, and particularly preferably at least ten, for example at least 20, stored heating power densities.Alternatively, it is conceivable that any other number of stored heating power densities, deemed sensible by an expert, could be selected. 202401243.

[0016] 6

[0017] The term "intended" means specifically programmed, designed, and / or equipped. The fact that an object is intended for a specific function means that the object fulfills and / or executes this specific function in at least one application and / or operating state.

[0018] Furthermore, it is proposed that the coil sections are designed to simultaneously heat the same cooking vessel according to a set heat distribution, in particular determined by the corresponding set heating power density distribution. Advantageously, a specific inhomogeneous heat distribution can be achieved within the same cooking vessel, which differs according to the arrangement of the coil sections in the cooking vessel with respect to a concentric ring shape. In particular, cooking processes that require an inhomogeneous heat distribution in the cooking vessel, especially a difference in temperature between an outer and an inner area of ​​the cooking vessel, can be provided particularly advantageously, efficiently, and user-friendly.For example, the preparation of paella or similar dishes can be simplified, as meat can be seared in the inner heating zone and then moved to the outer heating zone to be kept warm, while other ingredients such as vegetables are sautéed in the hotter inner zone. The coiled sections of the induction unit preferably form a continuous heating zone on the base plate, which is intended for placing the cookware on to heat it.

[0019] Furthermore, it is proposed that the user interface include at least one mode input device designed to switch the control unit between an operating state with differently adjustable heating power densities and another operating state in which the winding sections are always operated with the same heating power densities. Advantageously, the induction cooktop can be switched particularly easily between a standard cooking mode, in which the induction unit and, in particular, the heating zone provided by the induction unit has a uniform heating power density, and a professional cooking mode, in which the heat distribution of the heating zone is determined by the variably adjustable heating power densities.

[0020] 7

[0021] Heating power densities are variable from a uniform distribution. In particular, the ease of use of the cooktop and the efficiency of the cooking process can be advantageously increased. In the subsequent operating state, the winding sections are preferably only operable with the same heating power densities. When switching from the operating state to the subsequent operating state by activating the mode input device, the control unit can, for example, be designed to automatically operate the winding sections with the same heating power density, which corresponds to the heating power density of at least one of the winding sections in the operating state before the switch. Preferably, the heating power densities of the winding sections in the operating state can also be set to be equal to each other, particularly according to a corresponding user input.When switching from the further operating state to the operating state by actuating the mode input means, the heating power densities of the winding sections, especially in the absence of further operator input to set the different heating powers, are preferably automatically set to be equal to each other and correspond in particular to the heating power density of the winding sections in the further operating state before the switch.

[0022] Furthermore, it is proposed that the heating power densities be independently adjustable in at least one operating state. Advantageously, the heating power density of a respective winding section can be selected independently of any influence on the heating power density of at least one other winding section, thereby increasing flexibility. Preferably, a maximum adjustable heating power for operating the entire induction unit corresponds to the sum of the respective maximum adjustable heating powers for operating the individual winding sections, which are, in particular, individually specified in the control unit. The respective maximum adjustable heating powers for operating a respective winding section can, in particular, correspond to a heating power when using a boost mode of the induction cooktop device.The operator interface preferably has, at least in at least one operating state, at least temporarily at least one power input means for independently adjusting the heating power densities of the winding sections. The operator interface preferably has, at least in the at least one 202401243.

[0023] 8

[0024] In the operating state, at least temporarily, at least one power output device, preferably one power output device per winding section of the at least one induction unit, is activated to output the heating power densities of the winding sections, set by means of the power input device, to the operator. The power output device is preferably designed as a power indicator. Preferably, the power input device also functions as a corresponding power output device. Alternatively, it is conceivable that the power input device and the corresponding power output device are arranged separately from each other.

[0025] It is further proposed that the user interface, at least in one operating state, has at least two power input means, each for independently setting the heating power densities of the winding sections, particularly as mentioned above. Advantageously, the heating power densities can be set independently of each other in a particularly simple and clear manner, especially for induction units with more than two winding sections. In particular, the specific heating power density of each winding section can be displayed very clearly. Preferably, in each operating state, the user interface has at least one, and preferably exactly one, power input means for setting the heating power density of exactly one winding section. The power input means itself is preferably designed to output and, in particular, display the set heating power densities.The power input device is preferably designed as a slider or a dial, which can be moved or rotated, in particular, from a minimum heating power density of zero to a maximum heating power density. Alternatively, any other design of the power input device that appears sensible to a person skilled in the art is conceivable. The user interface preferably always displays the power input and / or power output devices in the operating state. Advantageously, user-friendliness can be increased by allowing the operator to quickly obtain an overview of the currently set heating power densities at all times by viewing the user interface, in particular the power input devices, in the operating state. 202401243.

[0026] 9

[0027] Alternatively, it would be conceivable that the user interface only displays the power input and / or power output means temporarily in the operating state, for example, only within a predefined time interval after activation of the mode input means. This would improve the aesthetics and / or complexity of the induction cooktop by reducing the display of the user interface. Alternatively or additionally, it is conceivable that the user interface only has a power input means for independent adjustment, whereby the power input means could preferably switch between adjusting the heating power density of the different winding sections and / or differentiate from the control unit in another way that would appear sensible to a person skilled in the art.

[0028] In a further embodiment of the invention, it is proposed that the heating power densities in at least one operating state can be adjusted independently of each other. Advantageously, the number of operator inputs required to adjust the heating power densities in the operating state can be reduced, thereby increasing ease of use. In particular, a specific ratio between the heating power densities can be set in a particularly simple manner. Preferably, a maximum adjustable heating power for operating the entire induction unit corresponds to a maximum adjustable heating power for operating a single winding section. The maximum adjustable heating power can, in particular, correspond to a heating power when using a boost mode of the induction cooktop device.

[0029] Furthermore, it is proposed that the operator interface, at least in at least one operating state, includes at least temporarily one, and in particular exactly one, total power input means for setting a total heating power, in particular by means of a single operator input, for operating the induction unit, in particular exactly one induction unit. Advantageously, the number of operator inputs can be reduced when changing only the total heating power of the induction unit while maintaining a previously set ratio of heating power densities, compared to an embodiment with independently adjustable heating power densities. (202401243)

[0030] 10

[0031] The total power input means is provided, in particular, for setting a total heating power by means of which the induction unit, and thus especially the winding sections, are operated in combination. The operator interface preferably has, at least in at least one operating state, at least temporarily at least one, and in particular exactly one, total power output means for outputting the total heating power of the induction unit, set by means of the total power input means, to the operator. The total power output means is preferably designed as a total power indicator. Preferably, the total power input means also functions as the total power output means.The total power input device is preferably designed as a slider or a dial, which can be moved or rotated, in particular, from a minimum value of zero to a maximum available heating power. Alternatively, any other design of the total power input device that appears sensible to a person skilled in the art is conceivable.

[0032] For example, a separate arrangement of the total power input device and the total power output device is conceivable. The operator interface preferably always displays the total power input device and / or the total power output device in the operating state. Advantageously, user-friendliness can be increased by allowing the operator to quickly obtain an overview of the currently set total heating power by viewing the operator interface, particularly the power input device, in the operating state.Alternatively, it would be conceivable that the user interface only displays the overall power input device and / or the overall power output device in the operating state temporarily, for example only within a predefined time interval after activation of the mode input device, thereby improving the aesthetics and / or complexity of the induction hob by reducing the display of the user interface.

[0033] Furthermore, it is proposed that the user interface, at least in at least one operating state, at least temporarily provide at least one, for example exactly one, ratio input means for setting a power density ratio between the winding sections of the induction unit. Advantageously, 202401243

[0034] 11. At least a number of operator inputs can be reduced when changing only the ratio of the heating power densities while maintaining the already set total heating power of the induction unit. In particular, the operator can set the power density ratio in a particularly simple manner and adapt it to a selected cooking process. The ratio input means is specifically designed for setting a ratio between the heating power densities of the different winding sections for a total heating power of the induction unit set by means of the total power input means. The operator interface preferably has at least one, and in particular exactly one, ratio output means for outputting the ratio of the heating power densities set by means of the ratio input means to the operator, at least temporarily in at least one operating state.The ratio output means is preferably configured as a ratio display means. Preferably, the ratio input means also functions as the ratio output means. The ratio input means can, for example, be configured as a slider, a dial, or a button. The ratio input means is preferably adjustable from a minimum value of 0% of the total heating power provided for an external heating power density of an external winding section to a maximum value of 100% of the total heating power provided for the external heating power density, in particular by being movable, rotatable, and / or actuated. Alternatively, the ratio input means can be adjustable from a minimum value of 0% of the total heating power provided for an internal heating power density of the internal winding section to a maximum value of 100% of the total heating power provided for the internal heating power density.In particular, a value of 0% of the total heating power provided for the external heating power density corresponds to a value of zero for the external heating power density, and a value of 100% of the total heating power provided for the internal heating power density, and vice versa. A proportion PEXT of the total heating power provided for the external heating power density and a proportion INT of the total heating power provided for the internal heating power density are preferably correlated in the operating state according to an equation PEXT = 100% - PINT, wherein the entire set total heating power for a value of 100% of a heating power density is provided entirely at exactly one corresponding winding section. Alternatively, any other arrangement is acceptable to a person skilled in the art.

[0035] 12. A sensible design for the overall performance input means is conceivable. For example, a separate arrangement of the ratio input means and the ratio output means is conceivable.

[0036] Preferably, the operator interface displays the ratio output only temporarily in the operating state, for example, only within a predefined time interval after activation of the mode input device. The operator interface is preferably designed to output, and in particular display, the power ratio set by means of the ratio input device only within the predefined time interval after activation of the mode input device.

[0037] Furthermore, in one embodiment of the invention, it is proposed that the user interface displays the ratio input means, particularly when unactivated, only during a predetermined time interval after activation of the mode input means, and especially for the entire duration of the time interval. Advantageously, the aesthetics and / or complexity of the induction cooktop can be improved by a reduced display of the user interface. In particular, the total heating power can be set particularly intuitively and clearly while maintaining the power density ratio, thereby increasing ease of use. The time interval preferably has a duration of at least 1 s, advantageously at least 2 s, more preferably at least 3 s, and by way of example at least 4 s and / or 5 s, and / or a maximum of 20 s, advantageously a maximum of 10 s, and more preferably a maximum of 8 s, particularly preferably a maximum of 6 s, and most advantageously a maximum of 5 s.

[0038] Alternatively, other durations of the time interval that appear sensible to a person skilled in the art are conceivable. The user interface preferably features the ratio input means for the duration of the time interval following activation of the mode input means to switch from the further operating state to the operating state. Preferably, the user interface also features the ratio input means outside the time interval if activation of the ratio input means begins within the time interval, and if activation continues outside the time interval. After activation, the user interface preferably features the ratio input means for at least a further time interval, which may, for example, correspond to or differ from the duration of the time interval. The time interval is particularly 202401243

[0039] The time interval is stored in the control unit. It is conceivable that the operator and / or a technician can change the time interval, particularly by changing settings in the control unit.

[0040] Alternatively or additionally, it is conceivable that the user interface displays the ratio input device in the operating state after activation of the mode input device, in particular only until activation of another input device of the user interface. Alternatively, it is conceivable that the user interface always displays the ratio input device and / or the ratio output device in the operating state.

[0041] Furthermore, in another embodiment of the invention, it is proposed that the ratio input means be configured as the mode input means, wherein, when actuated, the mode input means is designed to cause a cyclical change in the power density ratio between predefined values. Advantageously, a particularly reduced and especially clear number of input means for the user interface can be achieved, thereby significantly increasing ease of use. The predefined values ​​are preferably stored in the control unit. The predefined values ​​are preferably configured as discrete values ​​sorted in ascending order.It would be conceivable that exactly one mode input device is provided for at least two different operator operations for triggering the mode change and for changing the power density ratio, for example in the form of a push-button dial or the like, which can be pushed in for the mode change and rotated for changing the power density ratio. Preferably, however, the mode input device is designed for actuation by the same operator movement for both the mode change and for changing the power density ratio. For example, the mode input device could be designed as a digital or mechanical button which changes the mode change and / or the power density ratio depending on the duration of an operator operation.Preferably, the mode input means is provided for actuation by the same operator operation for changing the mode and for changing the power density ratio. In particular, the cyclical change of the power density ratio can be a change of 202401243.

[0042] 14

[0043] Operating conditions include, in particular, a power density ratio between the winding sections with respect to each 50% of the total heating power. Preferably, the control unit has at least 3, advantageously at least 5, more preferably at least 8, and particularly preferably at least 10 predefined values ​​of the power density ratio. For example, the control unit can have exactly 11 values, wherein, in particular, the power density ratio is adjustable in 10% increments from a proportion of 0% of the total heating power to a corresponding proportion of 100% for providing a heating power density of one of the winding sections. It is conceivable that the control unit has at least 15, for example, at least 20, or, by way of example, exactly 21 predefined values ​​of the power density ratio, wherein the ratio is variable, in particular, in 5% increments.

[0044] It is conceivable that the heating power densities of the winding sections in at least one operating state can be variably adjusted to different values ​​by setting a respective operating frequency of at least one operating signal or at least two operating signals for operating at least one of the respective winding sections, wherein the operating frequency for operating the different winding sections can be variably adjusted to different values. Preferably, the control unit is provided for adjusting the total heating power density of the induction unit in at least one operating state by setting a respective operating frequency, which can be identical to each other, for operating the winding sections.Alternatively or additionally, it is proposed that the heating power densities of the winding sections in at least one operating state can be variably adjusted relative to each other by setting the duty cycle of at least one operating signal, in particular the one mentioned above, for operating at least one of the winding sections, and / or by using a multiplexing method, and / or by setting a phase difference, in particular between the at least two operating signals for operating the at least two winding sections. Advantageously, the generation of a signal audibly perceptible to the human ear can be avoided by selecting a difference between the operating frequencies within an audibly perceptible range. In particular, user-friendliness and / or flexibility in selecting a heating power density can be increased.The heating power densities, and in particular a difference between the 202401243, can be advantageous.

[0045] 15

[0046] Heating power densities can be adjusted with exceptional efficiency and precision. Advantageously, the multiplexing method enables efficient switching of the inverters and, in particular, zero-voltage switching. Adjusting the phase difference allows for advantageous magnetic field coupling or decoupling, resulting in exceptional flexibility for a wide range of heat distributions using the induction unit. Preferably, the control unit is designed to adjust the duty cycle of a single operating signal for precisely one winding section, thereby allowing for variable adjustment of the heating power densities relative to each other.Alternatively, the control unit could be designed to adjust the duty cycle of the at least two operating signals for operating the at least two winding sections, thereby allowing the heating power densities to be variably different from each other. For adjusting the duty cycle, the control unit is specifically designed to reduce or increase it starting from a value of 0.5, which corresponds to a maximum heating power. Preferably, the control unit is designed to adjust the duty cycle within a value interval of 0 to 0.5 or 0.5 to 1. More preferably, the control unit is designed to adjust the duty cycle in relation to the power density ratio between the heating power densities, and in particular to adjust the total heating power by adjusting the operating frequency.Preferably, the multiplexing method is designed as a frequency multiplexing method or as a time multiplexing method between the operating frequencies for the operation of the different winding sections, in which the operating frequency is kept particularly constant and multiplex slots of the winding section for which a lower heating power density is to be set are switched off.

[0047] The induction cooktop device and the induction cooktop are not to be limited to the application and embodiment described above. In particular, the induction cooktop device and the induction cooktop may, to fulfill a function described herein, have a different number of individual elements, components, and units than specified herein.

[0048] Further advantages arise from the following drawing description. In the

[0049] The drawings show exemplary embodiments of the invention. The drawing, number 202401243

[0050] 16

[0051] The description and claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0052] They show:

[0053] Fig. 1 A schematic representation of an induction hob from above with a user interface and with two induction units, each having two concentric winding sections, Fig. 2 the induction unit in a schematic enlargement, Fig. 3 the user interface in an operating state according to the invention, Fig. 4 an alternative embodiment of a user interface, Fig. 5 a further alternative embodiment of a user interface,

[0054] Fig. 6 shows another alternative design of a user interface and

[0055] Fig. 7 shows an alternative embodiment of an induction unit with three concentric winding sections in a schematic representation.

[0056] Figure 1 shows a schematic representation of an induction hob 50a with an induction hob device 10a.

[0057] The induction cooktop device 10a has at least one induction unit 12a, which has at least two concentrically arranged annular winding sections 14a, 16a. The induction unit 12a is designed as an inductor. The induction unit 12a has only concentrically arranged annular winding sections 14a, 16a with respect to the arrangement of the winding sections 14a, 16a of the induction unit 12a.

[0058] The induction cooktop device 10a, by way of example, comprises exactly one induction unit 12a. Alternatively, the induction cooktop device 10a can have any other number of induction units 12a that would be considered reasonable by a person skilled in the art, which may be identical or different from one another (see Figure 7). In addition to the at least one induction unit 12a, the induction cooktop device 10a, by way of example, also has at least one conventional single-turn inductor 52a, which in particular has exactly one turn segment. 202401243

[0059] 17

[0060] The induction unit 12a in this example has exactly two winding sections 14a, 16a. Alternatively, more than two winding sections 14a, 16a of the induction unit 12a are conceivable (see Figure 7).

[0061] Each annular winding section 14a, 16a is designed as an induction coil, in particular as a flat coil.

[0062] The coil sections 14a and 16a are designed to simultaneously heat the same cooking vessel 60a according to a set heat distribution. The induction unit 12a forms, particularly on a mounting plate 56a of the induction cooktop 50a, a continuous heating zone 40a for heating a cooking vessel 60a. The coil sections 14a and 16a are designed to heat the cooking vessel 60a when it is positioned in the heating zone 40a.

[0063] The induction hob device 10a has at least one operator interface 20a.

[0064] The induction cooktop device 10a has a control unit 22a. The control unit 22a is connected to the user interface 20a, at least via data transmission, in particular by wired connection. The control unit 22a is designed to convert a user input at the user interface 20a into at least one control signal for adapting at least one operating signal, in particular by means of at least one inverter (not shown) of the induction cooktop device 10a, to operate the induction unit 12a.

[0065] Each winding section 14a, 16a is connected to at least one separate inverter for generating the operating signal for the operation of the respective winding section 14a, 16a. The winding sections 14a, 16a are each part of their own resonant circuit (not shown) with at least one resonant capacitor (not shown) for transferring inductive heating energy to the cooking vessel 60a when the winding sections 14a, 16a are operated with the respective operating signal.

[0066] The control unit 22a is designed to operate the winding sections 14a and 16a in at least one operating state with variably adjustable heating power densities, wherein the heating power densities are adjustable based on at least one operator input at the operator interface 20a. 202401243

[0067] 18

[0068] Figure 2 shows the induction unit 12a with the two winding sections 14a, 16a schematically.

[0069] Figure 3 shows a schematic representation of an exemplary design of the operator interface 20a in the operating state.

[0070] An inner, in particular internal, winding section 14a of the winding sections 14a, 16a of the induction unit 12a (see Figure 2) shall be designated with a designation “INT” in the following Figures 3 to 6 and an outer, in particular external, winding section 14a of the winding sections 14a, 16a of the induction unit 12a (see Figure 2) with a designation “EXT”.

[0071] The operator interface 20a has, at least in its operating state, at least one input means 42a for at least one operator input relating to the operation of the induction unit 12a. The input means 42a is designed as a control element. In this example, the operator interface 20a is designed as a touchpad. The input means 42a is digitally configured as an area of ​​the operator interface 20a, in particular the touchpad, which can be actuated by the operator, at least for controlling the heating power densities. In its operating state, the operator interface 20a has more than one input means 42a for more than one operator input.

[0072] The operator interface 20a, at least in its operating state, has at least one output device 44a, which is designed to output at least one piece of information regarding a setting based on operator input. The output device 44a is configured as a display device.

[0073] The input device 42a functions in this case as the corresponding output device 44a with respect to the operator input. The input device 42a itself is intended in this case to output at least one piece of information.

[0074] The operator interface 20a includes at least one exemplary further input means 54a, which is intended for the execution of at least one operator input relating to the operation of at least one single-turn inductor 52a. 202401243

[0075] 19

[0076] Alternatively or additionally, the operator interface 20a may include mechanical input means (not shown), such as mechanical pushbuttons and / or dials and / or switches and / or the like. Alternatively or additionally, the operator interface 20a may include output means 44a (not shown) that are separate from the input means 42a.

[0077] The operator interface 20a has at least one mode input means 28a, which is intended to switch the control unit 22a between the operating state with differently adjustable heating power densities and another operating state in which the winding sections 14a, 16a are operated with heating power densities of the same size.

[0078] The mode input device 28a also functions as a mode output device and, for example, lights up in the operating state. Alternatively, the user interface 20a can have a mode output device (not shown) arranged separately from the mode input device 28a, for example, in an area of ​​the user interface 20a that is arranged differently from the mode input device 28a, in particular the touchpad.

[0079] The heating power densities can be adjusted independently of each other in at least one operating state.

[0080] The operator interface 20a preferably has at least one power input device 24a, 26a in at least one operating state, each for independently adjusting the heating power densities of the winding sections 14a, 16a. The power input device 24a, 26a also functions as a power output device.

[0081] The operator interface 20a has, at least in one operating state, at least two power input devices 24a, 26a, each for independently adjusting the heating power densities of the winding sections 14a, 16a. Each power input device 24a, 26a is provided for individually adjusting the heating power densities for operating one of the winding sections 14a, 16a. Each individual heating power density setting is assigned at least one operator input at one of the power input devices 24a, 26a, which changes only exactly one of the heating power densities. 202401243

[0082] 20

[0083] The power input devices 24a and 26a are identical in this case. The power input devices 24a and 26a are, by way of example, configured as digital sliders. Alternatively, any other configuration of the power input devices 24a and 26a that would be considered sensible by a person skilled in the art is conceivable.

[0084] In the further operating state, the operator interface 20a has only one power input device (not shown), which is provided for the simultaneous and uniform setting of exactly one heating power density for the operation of all winding sections 14a, 16a of the induction unit 12a. The power input device of the further operating state can be configured according to one of the power input devices 24a, 26a of the operating state.

[0085] The heating power densities of the winding sections 14a, 16a in at least one operating state can be variably adjusted to each other by setting a duty cycle of the at least one operating signal for the operation of at least one of the winding sections 14a, 16a.

[0086] Alternatively or additionally, the heating power densities of the winding sections 14a, 16a can be adjusted differently from each other in at least one operating state by means of a multiplex method and / or variably.

[0087] Alternatively or additionally, the heating power densities of the winding sections 14a and 16a can be variably adjusted to differ from each other in at least one operating state by setting a phase difference. The phase difference is defined between the at least two operating signals for operating the respective winding sections 14a and 16a.

[0088] Alternatively or additionally, the heating power densities of the winding sections 14a, 16a can be variably adjusted to each other in at least one operating state by setting a respective operating frequency of at least one operating signal for the operation of at least one of the respective winding sections 14a, 16a.

[0089] The control unit 22a is used to set at least one duty cycle and / or at least one parameter with regard to the multiplexing procedure and / or the 202401243

[0090] 21

[0091] Phase difference and / or at least one operating frequency, in particular by means of controlling the inverters, is provided.

[0092] Of the objects that appear multiple times in the figures, only one is marked with a reference symbol.

[0093] Figures 4 to 7 show further embodiments of the invention. The following descriptions are essentially limited to the differences between the embodiments, whereby reference can be made to the description of the embodiment shown in Figures 1 to 3 with regard to components, features, and functions that remain the same. To distinguish the embodiments, the letter a in the reference numerals of the embodiment in Figures 1 to 3 is replaced by the letter b in the reference numerals of the embodiment shown in Figure 4, by the letter c in the reference numerals of the embodiment shown in Figure 5, by the letter d in the reference numerals of the embodiment shown in Figure 6, and by the letter e in the reference numerals of the embodiment shown in Figure 7.With regard to identically designated components, in particular with regard to components with the same reference numerals, reference can also be made to the drawings and / or the description of the embodiment in Figures 1 to 3.

[0094] Figure 4 shows a schematic representation of an exemplary embodiment of an operator interface 20b of an induction hob device for controlling at least two operating signals for operating an induction unit (not shown) of the induction hob device (not shown) by means of a control unit (not shown) of the induction hob device connected to the operator interface in at least one operating state, in which the control unit is provided to operate winding sections (not shown) of the induction unit in at least one operating state with heating power densities that can be set variably differently from each other, wherein the heating power densities can be set based on at least one operator input at the operator interface 20b.

[0095] The heating power densities are adjustable in at least one operating state, depending on each other. 202401243

[0096] 22

[0097] The operator interface 20b has, at least in one operating state, at least temporarily, in this case exactly one, total power input device 30b for setting a total heating power for operating the induction unit. The total power input device 30b is provided for setting the sum of all individual heating powers with which the individual winding sections of the induction unit are operated by a single operator input.

[0098] The total power input device 30b also functions as a total power output device in this case. The total power input device 30b is, by way of example, designed as a digital slider. Alternatively, any other design of the total power input device 30b that would appear sensible to a person skilled in the art is conceivable.

[0099] The operator interface 20b always has the total power input device 30b in the operating state.

[0100] The operator interface 20b has, at least in at least one operating state, at least temporarily at least one, in this case exactly one, ratio input means 32b for setting a power density ratio between the winding sections of the induction unit. The ratio input means 32b is provided for setting a ratio between the heating power densities of the different winding sections of the induction unit for a total heating power of the induction unit set at the total power input means 30b.

[0101] The ratio input device 32b also functions as a ratio output device in this case. The ratio input device 32b is implemented here as an example of a digital slider. Alternatively, any other implementation of the ratio input device 32b that appears sensible to a person skilled in the art is conceivable.

[0102] The operator interface 20b always features the ratio input device 32b in the current operating state.

[0103] Figure 5 shows a further embodiment of the invention. The following descriptions are essentially limited to the differences from the embodiment of Figure 4, with regard to unchanged components, features 202401243

[0104] 23 and functions, in particular reference can be made to the description of the embodiment shown in Figure 4.

[0105] Figure 5 shows a schematic representation of an exemplary embodiment of an operator interface 20c of an induction hob device for controlling at least two operating signals for operating an induction unit (not shown) of the induction hob device (not shown) by means of a control unit (not shown) of the induction hob device connected to the operator interface 20c in at least one operating state, in which the control unit is provided to operate winding sections (not shown) of the induction unit in at least one operating state with heating power densities that can be set variably differently from each other, wherein the heating power densities can be set based on at least one operator input at the operator interface 20c.

[0106] The operator interface 20c has at least one mode input means 28c, which is intended to switch the control unit between an operating state with differently adjustable heating power densities and another operating state in which the winding sections are operated with equal heating power densities. The operator interface 20c has, at least temporarily in at least one, in this case exactly one, ratio input means 32c for setting a power density ratio between the winding sections of the induction unit.

[0107] The ratio input means 32c is designed as the mode input means 28c, wherein the mode input means 28c is provided for a cyclic change of the power density ratio between predefined values ​​when actuated.

[0108] The operator interface 20c has a ratio output device 34c at least temporarily in at least one operating state. The ratio output device 34c is arranged separately from the ratio input device 32c.

[0109] The ratio output means 34c gives the power density ratio with respect to a proportion of an applied heating power for the operation of one of the winding sections, in this case an outer winding section by way of example, to the operation of this winding section with the heating power density corresponding to the heating power, of 202401243

[0110] 24 indicates the total heating power with which the induction unit is operated. Alternatively, another output format for the power density ratio, which would appear sensible to a specialist, is conceivable. The ratio output medium 34c expresses the power density ratio as a percentage.

[0111] The operator interface 20c always displays the ratio input device 32b in the current operating state. The operator interface 20d, for example, displays the ratio output device 34c only within a predefined time interval after activation of the mode input device 28c.

[0112] Figure 6 shows a further embodiment of the invention. The following descriptions are essentially limited to the differences from the embodiment shown in Figure 4, whereby with regard to unchanged components, features and functions, reference can be made in particular to the description of the embodiment shown in Figure 4.

[0113] Figure 6 shows a schematic representation of an exemplary embodiment of an operator interface 20d of an induction hob device for controlling at least two operating signals for operating an induction unit (not shown) of the induction hob device (not shown) by means of a control unit (not shown) of the induction hob device connected to the operator interface in at least one operating state, in which the control unit is provided to operate winding sections (not shown) of the induction unit in at least one operating state with heating power densities that can be set variably differently from each other, wherein the heating power densities can be set based on at least one operator input at the operator interface 20d.

[0114] The operator interface 20d has at least one mode input means 28d, which is intended to switch the control unit between an operating state with differently adjustable heating power densities and another operating state in which the winding sections are operated with equal heating power densities. The operator interface 20d has at least one, in this case exactly one, 202401243 in at least one operating state, at least temporarily.

[0115] 25

[0116] Ratio input means 32d for setting a power density ratio between the winding sections of the induction unit.

[0117] The ratio input device 32d also functions as a ratio output device in this case. The ratio input device 32d is implemented here as an example of a digital slider. Alternatively, any other implementation of the ratio input device 32d that appears sensible to a person skilled in the art is conceivable.

[0118] The operator interface 20d only displays the ratio input device 32d within a specified time interval after activation of the mode input device 28d.

[0119] Outside the specified time interval after activation of the mode input device 28d, the operator interface 20d in the operating state has, for example, a total power input device (not shown) instead of the ratio input device 32d, in which a total heating power for operating the induction unit can be set.

[0120] Figure 7 shows a further embodiment of the invention. The following descriptions are essentially limited to the differences from the embodiment shown in Figures 1 to 3, whereby with regard to unchanged components, features and functions, particular reference can be made to the description of the embodiment shown in Figures 1 to 3.

[0121] Figure 7 shows an induction hob device 10e which has exactly three concentric ring-shaped winding sections 14e, 16e, 18e.

[0122] 202401243

[0123] 26

[0124] Reference sign

[0125] 10 Induction hob device

[0126] 12 induction units

[0127] 14 winding section

[0128] 16 winding section

[0129] 18 winding section

[0130] 20 User interface

[0131] 22 Control unit

[0132] 24 Performance input devices

[0133] 26 Performance input devices

[0134] 28 Mode Input Devices

[0135] 30 Total performance input means

[0136] 32 Ratio input means

[0137] 34 Proportional expenditure funds

[0138] 40 heating zones

[0139] 42 Input devices

[0140] 44 expenditure funds

[0141] 50 induction hob

[0142] 52 single-turn inductor

[0143] 54 other input devices

[0144] 56 Mounting plate

[0145] 60 cooking utensils

Claims

202401243 27 Claims 1. Induction hob device (10a), comprising at least one induction unit (12a; 12e) which has at least two concentrically arranged annular winding sections (14a, 16a; 14e, 16e, 18e), comprising at least one operator interface (20a; 20b; 20c; 20d) and a control unit (22a) which is provided to operate the winding sections (14a, 16a; 14e, 16e, 18e) in at least one operating state with heating power densities that can be set variably differently from each other, wherein the heating power densities are adjustable based on at least one operator input at the operator interface (20a; 20b; 20c; 20d).

2. Induction hob device (10a) according to claim 1, characterized in that the winding sections (14a, 16a; 14e, 16e, 18e) are provided to simultaneously heat the same cooking vessel (60a) according to a set heat distribution.

3. Induction hob device (10a) according to claim 1 or 2, characterized in that the operator interface (20a; 20b; 20c; 20d) has at least one mode input means (28a; 28b; 28c; 28d) which is provided to switch the control unit (22a) between the operating state with differently adjustable heating power densities and another operating state in which the winding sections (14a, 16a; 14e, 16e, 18e) are operated with the same heating power densities.

4. Induction hob device (10a) according to one of the preceding claims, characterized in that the heating power densities are independently adjustable in at least one operating state. 202401243 28 5. Induction hob device (10a) according to claim 4, characterized in that the operator interface (20a) has at least two power input means (24a, 26a) each for independent adjustment of the heating power densities of the winding sections (14a, 16a) in at least one operating state.

6. Induction hob device according to one of claims 1 to 3, characterized in that the heating power densities are adjustable depending on each other in at least one operating state.

7. Induction hob device according to one of the preceding claims, characterized in that the operator interface (20b; 20c; 20d) has, at least in at least one operating state, at least temporarily a total power input means (30b; 30c) for setting a total heating power for operation of the induction unit.

8. Induction hob device according to one of the preceding claims, characterized in that the operator interface (20b; 20c; 20d) has at least in at least one operating state at least temporarily at least one ratio input means (32b; 32c; 32d) for setting a power density ratio between the winding sections of the induction unit.

9. Induction hob device according to claims 3 and 8, characterized in that the operator interface (20d) has the ratio input means (32d) only in a predetermined time interval after an actuation of the mode input means (28d). 202401243 29 10. Induction hob device according to claims 3 and 8, characterized in that the ratio input means (32c) is designed as the mode input means (28c), wherein the mode input means (28c) is provided for a cyclic change of the power density ratio between predefined values ​​when actuated.

11. Induction hob device (10a) according to one of the preceding claims, characterized in that the heating power densities of the winding sections (14a, 16a; 14e, 16e, 18e) in the at least one operating state by means of a setting of a duty cycle of at least one operating signal for the operation of at least one of the winding sections (14a, 16a; 14e, 16e, 18e) and / or by means of a multiplexing method and / or by means of a phase difference that can be variably adjusted to each other.

12. Induction hob (50a) with at least one induction hob device (10a) according to one of claims 1 to 11.

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