EP2692204B1 - Domestic appliance device - Google Patents

Description

The invention relates to a household appliance device according to the preamble of claim 1.

Domestic appliances with a power module, a control unit and several consumers are known from the prior art.

document WO 2008/067999 A1 discloses such an induction heater of the prior art

The object of the invention is in particular to provide a generic device with improved comfort. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

The invention is based on a domestic appliance device, in particular a cooking appliance device, with at least one power module, at least two, in particular at least three, consumer units and at least one control unit.

It is proposed that the control unit is provided, in at least one operating mode in which at least two of the consumer units are supplied together by the power module and in which a sum of services requested for the consumer units exceeds an available power of the power module, at least a part of Distribute available power depending on at least one operating characteristic to the consumer units. A "power module" is to be understood in particular as an arrangement of electronic components which is preferably provided for electrical power, which relates the power module in particular from a single phase of a home network connection, in particular a three-phase connection, via a distributor arrangement, preferably a switching arrangement at least one mechanical switching element, in particular a relay, and / or at least one electronic switching element, in particular a transistor, has to supply the consumer units. In particular, the power module has at least one voltage converter, in particular at least one rectifier and / or at least one inverter, in order to convert an AC line voltage into a usable voltage in the consumer units voltage form, in particular a pulsating DC voltage, a DC voltage and / or preferably a high-frequency AC voltage. A "consumer unit" should in particular be understood to mean a unit which has at least one consumer. In particular, in each operating state in which the consumer unit is supplied with energy, each of the consumers, preferably simultaneously, is supplied with energy. Preferably, the consumers are connected in parallel. A "consumer" is to be understood in particular as a component which is intended to supply electrical energy to another form of energy, in particular mechanical energy, preferably heat energy and / or electromagnetic radiation, advantageously with an efficiency greater than 40%, in particular greater than 60%. advantageously greater than 80%, and preferably greater than 90%, to convert. In particular, the consumer is intended, in at least one operating state, to continuously record a mean power of at least 50 W, in particular at least 100 W, advantageously at least 500 W, particularly advantageously at least 1000 W and preferably at least 2000 W over a period of time which is at least 10 s, advantageously at least 1 min and preferably at least 5 min. Preferably, a consumer is designed as a heating element. A "control unit" is to be understood in particular as meaning an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a domestic appliance device and which is preferably provided to control and / or regulate at least the power unit. The control unit preferably comprises a computing unit and, in particular in addition to the computing unit, a memory unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit. It is to be understood in particular that consumer units are supplied "jointly" by a power module that the two consumer units over a period of not more than 5 min, in particular not more than 1 min, advantageously not more than 10 s and preferably not more than 2 s, in each case at least once Power module to be supplied. In particular, at least two of the consumer units are simultaneously and / or at least two of the consumer units are alternately, preferably periodically alternately, supplied by the power module. Under the fact that services for the consumer units are "requested", should be understood in particular that this determined in the context of a program of the control unit and / or set by an operator via an operator interface and are greater than 0W. An "available power" should be understood in particular to be a device-side limitation of the power that can be removed by the power module via the phase. In particular, this device-side limitation corresponds to a setting that corresponds to a maximum load capacity of the phase to which the power module is connected, and in particular by an operator, an installer and / or a service technician, and / or a maximum load capacity of the electronic components of the Power module corresponds and was deposited in a production process of the home appliance device in a memory unit of the control unit. In particular, for a single consumer unit a maximum power is required which corresponds to at least 30%, in particular at least 50%, advantageously at least 70% and preferably at least 90% of the available power. A "part" of the available power should in particular be understood as meaning at least 1%, in particular at least 5%, advantageously at least 20% and preferably at least 70% of the available power. An "operating parameter" is to be understood as meaning, in particular, a constant or a variable of the domestic appliance device that is variable during operation of the domestic appliance device. The operating parameter can be designed to be variable by an adjustment process and / or by a learning process. In particular, a distribution of the available power takes place independently of an activation order of the consumer units. By the fact that the control unit is intended to "distribute" the available power as a function of at least one operating parameter, it should be understood in particular that the control unit is intended to determine a reduction factor at least for one of the consumer units in dependence on the operating parameter. by which a requested power of the consumer unit is reduced to a reduced, allocated power. In particular, a reduction factor should be understood to mean a real number greater than 0 and at most as great as 1. A "determination" is intended in particular to be a calculation in the mathematical sense with the aid of mathematical functions, in particular addition, multiplication, integration, division and / or a combination thereof, and / or an assignment of values via at least one map stored in a memory unit of the control unit and / or logical operations based on programmed conditions. In particular, the requested and / or the assigned, reduced Services stored in a storage unit. In particular, a distribution of the available line occurs after an increase in at least one of the requested services, in a case where a sum of the requested and / or reduced services is greater than the available power. In particular, increased comfort can be achieved.

In particular, the control unit is provided, at least in an operating mode in which the sum of the requested services exceeds the available power and the consumer units services are allocated, the sum of which corresponds to the maximum available power in the course of a power adjustment in which at least one of the Consumer services is required to keep allocated services of other consumer units constant. In particular, an allocated power of the consumer unit is lowered only when a requested power falls below the allocated power. On the other hand, embodiments are conceivable in which, when the requested power of one of the consumer units is lowered, the allocated power is proportionately reduced. In particular, increased security can be ensured since unpredictable increases in heating power are avoided by an operator.

In an advantageous embodiment, it is proposed that the control unit is provided to distribute at least part of the available power to the consumer units at least as a function of the services requested for the consumer units. In particular, the control unit is intended to distribute at least part of the available power proportionally to the consumer units. In particular, a consumer unit whose requested power corresponds to a maximum of 25%, in particular a maximum of 15% and preferably a maximum of 5% of the available power and / or whose maximum power corresponds to a maximum of 500 W, in particular a maximum of 300 W and preferably a maximum of 100 W, is allocated a power which corresponds to the requested service, and the remaining service is preferably split pro rata among the other consumer units. A "proportionate distribution" to consumer units is to be understood, in particular, as meaning that a ratio between the allocated and the requested service, that is to say the reduction factor, is the same for the consumer units. In particular, between 50% and 100%, advantageously between 60% and 90%, particularly advantageously between 70% and 85% and preferably between 75% and 80% of the available power proportionately distributed to the consumer units, in particular all consumer units. In particular, an allocation, in particular a reduction factor, of a consumer unit via a mathematical function, in particular in an application-relevant area a monotonous, especially strictly monotonous and preferably decreasing function, which preferably deviates from a constant determined, at least by a ratio of the requested power the consumer unit is dependent on a sum of the requested services of the consumer units. In particular, an increase in comfort can be achieved.

Furthermore, it is proposed that the control unit is provided to distribute at least part of the available power to the consumer units at least as a function of at least one stored characteristic. In particular, the parameter is stored in a memory unit of the control unit. The stored parameter may correspond, in particular, to a device-specific property, in particular an installation position and / or a size of the consumer units and / or a characteristic map, which is provided in particular for influencing variables to be assigned to measured values for reduction factors. In particular, a part, in particular up to 25%, of the available power can preferably be distributed to consumer units with specific properties, in particular a specific position and / or a specific size, in particular a diameter, an area and / or a volume, wherein in particular the Part is distributed to the at least one preferred consumer unit and in the event that the power allocated to the preferred consumer unit reaches the requested power, a remainder is distributed to the other consumer units, preferably on a pro-rata basis. In particular, increased comfort can be achieved.

In a further embodiment variant, it is proposed that the control unit be provided to distribute at least a portion, in particular up to 25%, of the available power as a function of at least one statistical parameter, in particular a statistical parameter of at least one of the consumer units, to the consumer units. A "statistical parameter" is to be understood, in particular, as meaning a parameter which is based on data that is transmitted via a a longer period of time, in particular at least the last day, the last week, the last month and preferably the entire running time of the control unit, in particular since a reset or initial activation of the control unit and / or its memory, and in particular a storage unit of the control unit are stored. Preferably, the control unit is provided for measuring, collecting and / or storing data for individual consumer units and / or groups of consumer units. In particular, the control unit is provided to run times of the consumer units, ie sums of periods in which the consumer units each had a power greater than 0 W was requested, or activation numbers of the consumer units, ie frequencies that a power was requested for the consumer unit, the Consumer unit was active and / or a change in performance was made, and / or average and / or maximum requested services of the consumer units to record and / or evaluate and / or to use as a statistical parameter. In particular, an increase in comfort can be achieved.

Furthermore, it is proposed that the control unit is provided to distribute at least part of the available power as a function of at least one sensor parameter to the consumer units. In particular, a value of a sensor and / or a value which is determined by means of a function and / or a characteristic diagram about the value of the sensor should be understood as a "sensor parameter". A "sensor" is to be understood as meaning, in particular, a component which is intended to uniquely transform a physical variable, at least in a domestic appliance-relevant area, into another physical variable, preferably a control unit, in particular an electrical, preferably digital signal. In particular, a map is stored in a memory unit of the control unit, which allows an assignment of sensor values to evaluation variables. Preferably, each of the consumer units is assigned a sensor. In particular, the sensor parameter corresponds to a temperature value, a humidity value or a degree of filling of a receiving region of the consumer unit. A "receiving area" is to be understood as meaning, in particular, an area, in particular an area and / or a volume, of the domestic appliance, which is intended to be fitted in and / or on a useful container, in particular a Garware, preferably a cookware, and / or a storage container and / or food at least partially arrange. In particular, a receiving region, preferably a heating zone, is determined by an area of action of a power element, preferably a heating element. A "range of action" is to be understood in particular as meaning an area in which an effect, in particular a heat output, corresponds to at least 1%, advantageously at least 5% and preferably at least 10% of a maximum local effect. In particular, the receiving area is an area directly above a power element, preferably a heating element. A "degree of completion" is to be understood in particular to mean a parameter which indicates a filling and / or occupancy of the receiving area. Preferably, the degree of filling indicates a percentage filling of the receiving area, preferably a percentage coverage of a heating area. In particular, increased comfort can be achieved.

In an alternative embodiment, it is proposed that the control unit is provided to distribute at least a portion of the available power as a function of at least one operator input to the consumer units. In particular, the domestic appliance device has an operator interface for this purpose. In particular, an operator can specify portions of the available power which are distributed to the consumer units by the control unit in accordance with at least one of the aforementioned criteria. In particular, the operator may specify a proportion, in particular up to a maximum of 50%, preferably up to a maximum of 25%, which is distributed among the consumer units in accordance with priority factors set by the operator. The operator inputs are stored in particular in the storage unit and retrieved when needed and / or entered and processed in real time during a work process. In particular, increased comfort can be ensured by user-specific prioritization of the consumer units.

In an advantageous embodiment, the domestic appliance device is designed as an induction heating device and thus the consumer units as induction heating units. In particular, the power module has at least one heating frequency unit. A "heating frequency unit" is intended in particular to mean an electrical unit be understood, which generates an oscillating electrical signal, preferably with a switching frequency of at least 1 kHz, in particular of at least 10 kHz, advantageously of at least 20 kHz and in particular of at most 100 kHz for an induction heating unit. In particular, the heating frequency unit is provided to provide a maximum electrical power of at least 1000 W, in particular at least 2000 W, advantageously at least 3000 W, and preferably at least 3500 W, required by the induction heating unit. The heating frequency unit comprises in particular at least one inverter, which preferably has at least two, preferably series-connected, bidirectional unipolar switches, which are in particular formed by a transistor and a diode connected in parallel, and particularly advantageously at least one damping capacitor connected in parallel to the bidirectional unipolar switches, which is in particular formed by at least one capacitor. As a result, a high-frequency power supply of the induction heating unit can be provided. A voltage tap of the radio-frequency unit is arranged in particular at a common contact point of two bidirectional unipolar switches. An "induction heating unit" should in particular be understood to mean a consumer unit having at least one induction heating element. An "induction heating element" is to be understood in particular as a wound electrical conductor, preferably in the form of a circular disk through which high-frequency alternating current flows in at least one operating state. The induction heating element is preferably provided to convert electrical energy into an alternating magnetic field, which is intended to cause in a metallic, preferably at least partially ferromagnetic, heating means, in particular cooking utensils, eddy currents and / or remagnetization effects, which are converted into heat. In embodiments as induction heaters improved comfort can be achieved by fast response times.

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. 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 meaningful further combinations.

Fig. 1

ein Induktionskochfeld mit einer Steuereinheit, die zu einer Ausführung eines erfindungsgemäßen Verfahrens vorgesehen ist, in einer schematischen Ansicht von oben und

Fig. 2

eine schematische Darstellung der Hausgerätevorrichtung.

Show it:

Fig. 1

an induction hob with a control unit, which is provided for carrying out a method according to the invention, in a schematic view from above and

Fig. 2

a schematic representation of the home appliance device.

FIG. 1 shows a designed as an induction hob home appliance 10 with a designed as induction heating appliance device 12, which is designed as induction hob with four, designed as induction heating units, consumer units 20, 22, 24, 26, each having a formed as an induction heating consumer, designed as an inductor is. The consumer units 20, 22, 24, 26 are arranged under a hob plate 14. Furthermore, the domestic appliance device 12 has a power module 18 operated by a single phase 16 of a three-phase domestic connection, which is provided to supply the consumer units 20, 22, 24, 26 with high-frequency alternating current with a switching frequency between 20 kHz and 100 kHz , For this purpose, the power module 18 has two voltage converters designed as heating frequency units 30, 32, which are intended to be operated via the single phase 16 and to supply the load units 20, 22, 24, 26 ( Fig. 2 ). The switching frequency of the heating frequency units 30, 32 is dependent, inter alia, on a heating capacity requested for the consumer unit 20, 22, 24, 26 via an operating unit 28 and a cooking utensil which is arranged in a heating zone on the hob plate 14 via the consumer unit 20, 22, 24, 26, and is determined by a control unit 34 of the home appliance device 12. The operating unit 28 has a control element 29 designed as a touch-sensitive display and four operating elements 90, 92, 94, 96 designed as a rotary selector switch. The control unit 34 has an arithmetic unit, a memory unit and an operating program stored in the memory unit, which is intended to be executed by the arithmetic unit.

FIG. 2 shows a circuit for the home appliance device 12. A voltage applied to a phase 16 between 220 V and 230 V with a mains frequency between 49 Hz and 51 Hz is rectified in a designed as a rectifier 36 voltage converter of the power module 18 and partially stored in a buffer capacity 38.

The poles of the buffer capacitor 38 form two external contacts 40, 42, between which a pulsating DC voltage is applied. The heating frequency units 30, 32 are arranged between the external contacts 40, 42 and convert the pulsating DC voltage into high-frequency alternating current. The Heizfrequenzeinheiten 30, 32 each have two between the outer contacts 40, 42 connected in series, designed as a bidirectional unipolar switch, switching elements 44, 46 each having a parallel-connected damping capacitor 48, 50 on. The switching elements 44, 46 are each formed by an IGBT 52, 54 (insulated gate bipolar transistor) and a parallel connected diode 56, 58. A voltage tap 60, 62 is arranged in each case at a common contact of the two IGBTs 52, 54. The control unit 34 causes by alternating, high-frequency control of the two IGBTs 52, 54 at the voltage tap 60 a high-frequency alternating voltage with pulsating amplitude, which follows a high-frequency alternating current when connecting a consumer unit 20, 22, 24, 26. The voltage taps 60, 62 of the heating frequency units 30, 32 are connected to a switching arrangement 64 having six relay elements formed switching elements 66, 68, 70, 72, 74, 76, which are designed as a single pole changeover switch, and by switching commands of the control unit 34 thereto is provided, 16 different combinations of up to two of the two Heizfrequenzeinheiten 30, 32 and up to two of the four consumer units 20, 22, 24, 26 to connect directly. The switching elements 66, 68, 70, 72, 74, 76 designed as single-pole changeover switches have three contacts and two switching states. In a first switching state, the first contact is directly connected to the second contact and in a second switching state, the first and the third contact are directly connected (in the illustration, the first contact is arranged on the left and the second contact on the top right). The switching elements 66, 68, 70, 72, 74, 76 are arranged in a cascaded circuit. A first contact of the switching element 66 is connected directly to the voltage tap 60 of the heating frequency unit 30. A second and a third contact of the switching element 66 is in each case directly connected to a first contact of the two switching elements 68, 70. The consumer units 20, 22, 24, 26 are each directly connected to one of the second or third contacts of the switching elements 68, 70. At the voltage tap 62 of the second heating frequency unit 32, a similar arrangement is connected to the switching elements 72, 74, 76. Each of the consumer units 20, 22, 24, 26 can thus be directly connected to each of the heating frequency units 30, 32 by suitable switching states of the switching elements 66, 68, 70, 72, 74, 76. Furthermore, any two of the consumer units 20, 22, 24, 26 can be used simultaneously with different ones Heizfrequenzeinheiten 30, 32 be directly connected. Likewise, for each of the consumer units 20, 22, 24, 26, a boost operation in which a single consumer unit 20, 22, 24, 26 is simultaneously directly connected to both heating frequency units 30, 32 is possible. The consumer units 20, 22, 24, 26 are each operated in half-bridge circuit. The consumer units 20, 22, 24, 26 each have a common contact 78, 79, which is in each case connected directly to a resonance unit 80, 81 which is formed by two resonance capacitances 82, 84 and 83, 85 formed from individual capacitors , The resonant capacitances 82, 84 and 83, 85 are each connected in series and one of the resonant capacitances 82, 83 is connected directly to one of the external contacts 40 and the other of the resonant capacitors 84, 85 is connected directly to the other external contact 42. Both of the resonance capacitances 82, 84 and 83, 85 are each connected directly to the two consumer units 20, 22 and 24, 26, respectively.

The power module 18 is designed to provide the consumer units 20, 22, 24, 26 with a total power P _max of 2300 W. In an alternative embodiment, the power module 18 is configured to provide a maximum power of 4500 W, but the overall power P _max is limited by a fuse that sets a maximum current that can be requested by the power module 18 via the phase 16 and is, for example, 3700 W. This maximum current is determined by an operator, preferably only indirectly, accessible control element or via a setting in a configuration menu of the home appliance device 12 via the control element 29 of the control unit 28. About switch positions designed as a rotary selector switch controls 90, 92, 94, 96 is a request for power P ₁ , P ₂ , P ₃ , P ₄ for each one of the consumer units 20, 22, 24, 26, wherein the requested power P _i accordingly the switch position is assigned a proportion between 0% and 100% of the available power P _max . If a sum P _{sum of} the requested services P _{i is} smaller than the available power P _max , the services P _i 'allocated to the consumer units 20, 22, 24, 26 correspond to the requested services P _i .

The control unit 34 is intended, in an operating mode in which two, three or four of the consumer units 20, 22, 24, 26 are supplied jointly by the power module 18 and in which a sum of the consumer units 20, 22, 24, 26 requested services P ₁ , P ₂ , P ₃ , P ₄ an available power P _max of Power module 18 exceeds at least a portion of the available power P _max depending on different operating characteristics to the load units 20, 22, 24, 26 to distribute. The services P ₁ ', P ₂ ', P ₃ ', P ₄ ' and the requested services P ₁ , P ₂ , P ₃ , P ₄ allocated to the consumer units 20, 22, 24, 26 are stored in the memory unit for later purposes ,

The control unit 34 is provided, in an operating mode in which the sum P _{sum of} the requested power P ₁ , P ₂ , P ₃ , P ₄ exceeds the available power P _max and the load units 20, 22, 24, 26 power P ₁ ', P ₂ ', P ₃ ', P ₄ ' are assigned, the sum P _sum 'maximum of the available power P _max corresponds, in the course of power adjustment, in which at least one of the consumer units 20, 22, 24, 26 requested Power P _{i is} lowered, to keep constant power P ₁ ', P ₂ ', P ₃ ', P ₄ ' of the other consumer units 20, 22, 24, 26. For example, the allocated power P ₁ 'of the consumer unit 20, whose requested power P _{1 is} lowered, is kept constant, as long as the requested power P _{1 is} greater than the allocated power P ₁ '. If the requested power P _{1 is} smaller than the allocated line, the allocated power P ₁ 'is reduced to the value of the requested power. The allocated services P ₂ ', P ₃ ', P ₄ 'of the other consumer units 22, 24, 26 remain constant. If a requested power P _{2 is} increased and exceeds a sum of the allocated power P ₁ ', P ₃ ', P ₄ 'and the requested power P _2, the available power P _max , a distribution of the available power P _{max is} based on the requested Performances P ₁ , P ₂ , P ₃ , P ₄ performed. If a newly calculated allocated power P ₁ ', P ₃ ', P ₄ 'exceeds the existing allocated power P ₁ ', P ₃ ', P ₄ ', the old allotted power P ₁ ', P ₃ ', P ₄ 'is maintained , A thereby becoming available amount of power, a difference between newly calculated and existing allocated power P ₁ ', P ₃ ', P ₄ ', can be distributed to the other consumer units 20, 22, 24, 26.

The control unit 34 is provided in a first embodiment, or a first operating mode, to the total available power P _max in response to the requested for the consumer units 20, 22, 24, 26 services to the consumer units 20, 22, 24, 26th to distribute. The requested power P ₁ , P ₂ , P ₃ , P ₄ , for example 0 W, 300 W, 1000 W and 1500 W are thereby by a reduction factor r = r ₁ = r ₂ = r ₃ = r ₄ , the ratio of available power P _max to the sum P _{sum of} the requested powers P ₁ , P ₂ , P ₃ , P ₄ , ie 2300/2800 = 0.82, corresponds, reduced. The numbers mentioned above will continue to be used for the following calculation examples.

In a second embodiment, or a second operating mode, the control unit 34 is provided to the total available power P _max in response to the requested for the consumer units 20, 22, 24, 26 benefits P ₁ , P ₂ , P ₃ , P ₄ on the consumer units 20, 22, 24, 26 to distribute. Reduction factors r ₁ , r ₂ , r ₃ , r ₄ are determined in accordance with the formula r _i = N (R - 1) × X + 1. N here is the number of consumption units 20, 22, 24, 26 with a requested power P _i greater than 0, X the ratio of P _i to P _sum and R the ratio of P _max to P _sum , ie P _max / P _sum , The powers P _i 'result in P _i ' = r _i × P _i . Thus, an excessive reduction of low requested power Pi can be avoided.

In further exemplary embodiments, or operating modes, the control unit 34 is provided to distribute a first portion of the available power P _max in accordance with the requested powers P ₁ , P ₂ , P ₃ , P ₄ , analogously to the first or second embodiment. This share is 78%. As a result, the consumer units 20, 22, 24, 26 are assigned a second portion of the available power P _max based on other characteristics, independent basic performance, by the divisions described below. The second share is accordingly 22%. Embodiments are furthermore conceivable in which the total available power is distributed to the consumer units 20, 22, 24, 26 in accordance with one of the methods described below.

In a third exemplary embodiment, or a third operating mode, the control unit 34 is provided to distribute the second portion of the available power P _max to the load units 20, 22, 24, 26 as a function of a stored characteristic. Since the heating zones in the front area of the cooking plates are used statistically more frequently, it is deposited in the storage unit that the front consumer units 22, 24, which are closer to an operator during a cooking process, are to be preferred when distributing the available power. Thus, the 22% are proportionately distributed to the front consumer units 22, 24 until they are used up, or the allocated services P ₂ ', P ₃ ' correspond to the requested services P ₂ , P ₃ . Thus, with a distribution of the 78% according to the first variant, P ₂ 'results 300 W = P ₂ and P ₃ 'to 1000 W = P ₃ . The remaining 40 W are allocated to the consumer unit 26, which thus reaches P ₄ '= 1000 W.

In a fourth exemplary embodiment, or a fourth operating mode, the control unit 34 is intended to distribute the second portion of the available power P _max to the load units 20, 22, 24, 26 as a function of a statistical characteristic. The control unit 34 is provided to count at a first switch-on starting at 0, how often the supply units 20, 22, 24, 26 are used. The second portion of the available power P _max is distributed according to the proportions of the frequency in proportion to a sum of the frequencies of the active load units 22, 24, 26. Thus, if, for example, the supply unit 24 was used 300 times and the supply units were used a total of 1000 times, 30% of the 22% of the available power P _max , ie 152 W would be added to the proportion of the base load. If the thus determined power P ₂ 'exceeds the requested power P ₂ , the difference is distributed according to the proportion of the frequencies of use to the other, consumer units 24, 26 and P ₂ ' = P _{2 is} set.

In further exemplary embodiments, or further operating modes, the allocation takes place as a function of another statistical characteristic, for example the total duration that a consumer unit was active or the average power that was requested for it, or another variable which appears to be suitable to the person skilled in the art.

In a fifth embodiment, or a fifth operating mode, the control unit 34 is provided for the second portion of the available power to the load units 20, 22, 24, 26 at least in response to sensor characteristics of temperature sensors, which are arranged below the heating zones to distribute. If sensor values are delivered by the temperature sensors which indicate a temperature of a cooking utensil which is greater than 100 ° C., this consumer unit 20, 22, 24, 26 is preferably treated. A power split is analogous to the embodiment with the preferred front consumer units 22, 24. If none of the consumer units 20, 22, 24, 26 preferred, the second portion is also proportionately distributed according to the requested services P _i .

In a sixth embodiment, or a sixth mode of operation, the control unit 34 is provided to the second portion of the available power at least in response to power factors, which are determined by voltage and current sensors of the heating frequency units and reflect an efficiency of the consumer units, distributed to the consumer units 20, 22, 24, 26. For each of the consumer units 20, 22, 24, 26, a power factor LF _{i is} determined. The second component is determined on the basis of the ratios of the power factors LF _i to a sum LF _{sum of} the power factors LF _{i of} the active consumer units 22, 24, 26.

In a seventh embodiment, or a seventh operating mode, the control unit 34 is provided to the second portion of the available power at least in response to at least one stored characteristic and in dependence on at least one sensor characteristic on the consumer units 20, 22, 24, 26 to distribute. The allocation is dependent on stored in the storage unit sizes, ie surfaces, the heating zones and degrees of completion of the heating zones, which are determined by sensors, for example via a coupling factor between the inductor of the consumer unit and a cooking appliance positioned above it, which is dependent on an inductance , The 22% of the available power is determined by the ratios of the products of the size of the heating zone of a consumer unit with the respective degree of filling of the heating zone to the sum of these products via the active consumer units 22, 24, 26.

On the other hand, embodiments, or operating modes, are conceivable in which only a portion of the size of the heating zone in relation to a buzzer of the sizes of the heating zones of the active consumer units 22, 24, 26 is taken into account in the distribution.

In an eighth embodiment, or an eighth operating mode, the control unit 34 is provided to distribute the second portion of the available power in response to operator inputs to the consumer units 20, 22, 24, 26. The operator can determine via the operating unit 28, that is, the operating element 29, in which ratio the second portion is to be distributed to the active consumer units 22, 24, 26.

In further embodiments, or operating modes, the control unit 34 is provided for at least two, in particular at least three, advantageously at least four, or preferably at least six, parts of the available power as a function of at least two, in particular at least three, advantageously at least four, or preferably at least six different parameters to the consumer units 20, 22, 24, 26 to distribute. For example, 55% of the power P _max available to be distributed to the first embodiment, 33% of embodiment four, 22% according to a variation of embodiment four, in which, instead of the frequencies of the useful lives are weighted, and 12% distributed to embodiment three.

In a further exemplary embodiment or operating mode, the control unit 34 is provided to determine, depending on operator inputs, which and how many parts of the available power P _max influence the distribution as a function of which and how many parameters. For example, a plurality of distribution options may be predetermined and the operator may specify a weighting of the various distribution options.

In each of the exemplary embodiments, the operating elements 90, 92, 94, 96 configured as a rotary selector switch could be dispensed with and a power requirement could take place solely via the operating element 29 designed as a touch-sensitive display. On the other hand, most of the proposed embodiments are independent of operator input, wherein the control element 29 could be dispensed with.

In a training as a matrix cooktop, all of these methods are also applicable. In particular, parameters of the consumer units, which form a common heating zone, or variables based on the parameters, which are used to calculate the proportion, are added.

Furthermore, embodiments of the invention are conceivable in which various resonant units can be assigned to the consumer units 20, 22, 24, 26 via switching elements or in which at least some of the consumer units 20, 22, 24, 26 have their own resonance units.

Alternatively, any numbers of at least two consumer units and at least two voltage transformers are conceivable, wherein the number of voltage transformers preferably corresponds to at least half the number of consumer units and / or a number of the resonance units preferably corresponds to the number of voltage transformers. reference numeral 10 household appliance 60 voltage tap 12 Home appliance device 62 voltage tap 14 Hotplate 64 switching arrangement 16 phase 66 switching element 18 power module 68 switching element 20 consumer unit 70 switching element 22 consumer unit 72 switching element 24 consumer unit 74 switching element 26 consumer unit 76 switching element 28 operating unit 78 common contact 29 operating element 79 common contact 30 Heizfrequenzeinheit 80 resonance unit 32 Heizfrequenzeinheit 81 resonance unit 34 control unit 82 resonant capacitance 36 rectifier 83 resonant capacitance 38 buffering capacity 84 resonant capacitance 40 outside Contact 85 resonant capacitance 42 outside Contact 90 operating element 44 switching element 92 operating element 46 switching element 94 operating element 48 snubber capacitor 96 operating element 50 snubber capacitor 52 IGBT 54 IGBT 56 diode 58 diode

Claims (7)

1. Cooking appliance device having at least one power module (18), at least two consumer units (20, 22, 24, 26) and at least one control unit (34), which is provided, in at least one operating mode, in which at least two of the consumer units (20, 22, 24, 26) are jointly supplied by the power module (18) and in which a sum of powers required for the consumer units (20, 22, 24, 26) exceeds an available power of the power module (18), to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) as a function of at least one operating parameter, characterised in that the control unit (34) is provided to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) at least as a function of at least one stored parameter.
2. Cooking appliance device according to claim 1, characterised in that the control unit (34) is provided, at least in one operating mode, in which the sum of the required powers exceeds the available power and powers are apportioned to the consumer units (20, 22, 24, 26), the sum of which corresponds at most to the available power, during the course of a power adjustment, in which at least one of the powers required for the consumer units (20, 22, 24, 26) is reduced, to keep powers apportioned to other consumer units (20, 22, 24, 26) constant.
3. Cooking appliance device according to one of the preceding claims, characterised in that the control unit (34) is provided to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) at least as a function of the powers required for the consumer units (20, 22, 24, 26).
4. Cooking appliance device according to one of the preceding claims, characterised in that the control unit (34) is provided to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) at least as a function of at least one statistical parameter.
5. Cooking appliance device according to one of the preceding claims, characterised in that the control unit (34) is provided to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) at least as a function of at least one sensor parameter.
6. Cooking appliance device according to one of the preceding claims, characterised in that the control unit (34) is provided to distribute at least one part of the available power among the consumer units (20, 22, 24, 26) at least as a function of at least one operator input.
7. Cooking appliance device according to one of the preceding claims, characterised in that the consumer units (20, 22, 24, 26) are embodied as induction heating units.

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