EP3556180A1

EP3556180A1 - Domestic appliance device

Info

Publication number: EP3556180A1
Application number: EP17822459.8A
Authority: EP
Inventors: José Miguel Burdio Pinilla; Tomas Cabeza Gozalo; Sergio Llorente Gil; Oscar Lucia Gil; Ignacio Millan Serrano; Alejandro NAVAL PALLARES; Hector Sarnago Andia
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2016-12-19
Filing date: 2017-12-12
Publication date: 2019-10-23
Anticipated expiration: 2037-12-12
Also published as: ES2673131B1; US20190274190A1; WO2018116053A1; EP3556180B1; CN110063090A; ES2673131A1; CN110063090B; US11153940B2

Abstract

The invention relates to a domestic appliance device comprising at least one inverter unit with a half-bridge circuit or full-bridge circuit design for operating multiple inductors by means of a multiplexer. In order to increase the efficiency of the domestic appliance device, the invention provides a domestic appliance device, more particularly a cooking device comprising: at least one number N of row switching elements (10a-q); at least one number M of column switching elements (12a-q); at least one heating matrix (14a-q) having at least one number ΝxΜ of heating matrix elements (16a-q), wherein for any i of 1 to N and any j of 1 to M, with a total number N+M of row switching elements (10a-q) and column switching elements (12a-q) that is greater than 2, the i, j-th heating matrix element (16a-q) comprises at least one i, j-th inductor (18a-q) and is connected both to the i-th row switching element (10a-q) and to the j-th column switching element (12a-q); and at least one switching diode (34a-q, 36a-q) that connects at least one of the row switching elements (10a-q) or at least one of the column switching elements (12a-q) to at least one reference potential (30a-q, 32a-q).

Description

Appliances device

The invention relates to a household appliance device, in particular a

Gargerätevorrichtung according to the preamble of claim 1.

A household appliance device with at least one inverter unit in half-bridge or full-bridge circuit for operating a plurality of inductors by means of a multiplexer is already known from the prior art.

The object of the invention is in particular to provide a generic device with improved properties in terms of efficiency. 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 relates to a household appliance device, in particular a cooking device device and preferably a cooktop device, having at least a number N of row switching elements, with at least a number M of column switching elements and with at least one heating matrix having at least one, in particular exactly one, number N * M of heating matrix elements for any i from 1 to N and any j from 1 to M with a total number N + M of column switching elements and

Row switching elements greater than 2 means that the i, j-th heating matrix element comprises at least one, preferably exactly one, i, j-th inductor and is connected to both the i-th row switching element and the j-th column switching element, and at least a switching diode which connects at least one of the row switching elements or at least one of the column switching elements with at least one reference potential.

In this context, a "household appliance device" is to be understood as meaning, in particular, at least one part, preferably at least one subassembly, of a domestic appliance

Cooking appliance, preferably as a microwave, an oven and / or a, in particular variable, hob, in particular a matrix cooktop, and particularly preferably as a inductive cooking appliance, such as in particular an induction oven and / or preferably an induction hob, in particular a matrix induction hob formed. A "cooking appliance device" is to be understood in particular as meaning a household appliance device which at least partially forms a cooking appliance. "A variable hob" is to be understood in this context to mean, in particular, a cooktop in which inductors, in particular in a regular spatial arrangement, in particular under a cooktop panel the domestic appliance device, are arranged and at least partially at least one heating zone, preferably a plurality of variable heating zones form, which comprises a portion of the hob plate preferably of at least 10%, preferably at least 30% and more preferably at least 40% of a total area of the hob plate / include. In particular, the inductors are designed to form the heating zone and to adapt it to the cooking utensil, depending on a position of a cooking utensil positioned on the hob plate. In particular, the term "provided" should be understood to mean specially programmed, designed and / or equipped.Assuming that an object is intended for a specific function should in particular mean that the object fulfills this specific function in at least one application and / or operating state In this context, a "number" is to be understood as meaning any number from the set of natural numbers. In particular, it should always be true that the total number N + M of column switching elements and row switching elements is greater than 2, if the number N of row switching elements and / or the number M on

Column switching elements is greater than 1. Under a "line switching element" and / or a "column switching element" in this context, in particular

Switching elements are understood, which lines and / or columns of a grid are associated with a switchable arrangement and / or define them. The circuit arrangement is in particular different from a spatial arrangement in which the column switching elements and row switching elements can be arranged in a preferred arrangement by a person skilled in the art and in particular particularly compact. The line switching elements are in particular with a

Row switching elements common reference potential connected. That the

Line switching elements common reference potential is in particular a

Operating potential of an operating voltage with which the household appliance device is operated. The reference potential common to the row switching elements is in particular a ground potential. The column switching elements are in particular with a further reference potential common to the column switching elements connected. The further reference potential common to the column switching elements is, in particular, a further operating potential of the operating voltage. The further reference potential common to the column switching elements is different in particular from a ground potential. In particular, lies between the reference potential common to the row switching elements and the further common to the column switching elements

Reference potential to an operating voltage. A "switching element" is to be understood in this context, in particular an element which to do so

is provided, in at least a first switching state to connect a first terminal electrically conductively connected to at least one second terminal and to separate in at least a second switching state, the first terminal of the second terminal. In particular, the switching element has at least one control connection via which the switching state of the switching element can be controlled. The switching element is in particular provided to change over from one of the switching states to the other switching state in a switching operation. The switching element can be embodied as any switching element which appears sensible to a person skilled in the art, preferably semiconductor switching element, such as a transistor, preferably as FET, as MOSFET and / or as IGBT, preferably as RC-IGBT and particularly preferably as HEMT. Transistor. A "HEMT transistor" should be understood in particular to be a high-electron mobility transistor, in particular having a particularly high electron mobility, which is in particular at 25 ^C C, in particular at least 400 cm ² V ^' V, preferably at least 800 cm ² V ^' V ^1, more preferably at least

800 cm ² V ^"1 s ^{" 1} and more preferably at least 1000 cm ² V ^' V'. In addition, modulation-doped field-effect transistors (MODFETs), two-dimensioned gas-fieid-effect transistors (TEGFETs), selectively-doped heterojunction transistors (SDHTs), and / or heterojunction-type Fieid-effect transistors will be described (HFET) are understood as HEMT transistors. In particular, the switching element has at least one first terminal, which is preferably a source terminal, a second terminal, which is preferably a drain terminal, and / or a control terminal, which is in particular a gate terminal, on. In particular, at least one diode, in particular a regeneration diode, and / or at least one capacitance, in particular a damping capacitance, can be connected to the switching element

Household appliance device to be connected in parallel. At least one i-tes

Row switching element and at least one j-th column switching element, in particular in a full-bridge topology or preferably are connected in a half-bridge topology, serve in particular as inverter switching elements and together form at least partially, preferably completely, an i, jth inverter unit of the household appliance device. The household appliance device comprises in particular a number Ν ^χ Μ of inverter units. An "ij-th inverter unit" is to be understood in particular as meaning a unit which is intended to supply a high-frequency heating current, preferably with a frequency of at least 1 kHz, in particular of at least 10 kHz and advantageously of at least 20 kHz,

in particular to an operation of the ij-th inductor, to provide and / or to produce. The household appliance device has in particular a control unit, which is provided for driving the row switching elements and the column switching elements. A "control unit" is to be understood as meaning, in particular, an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a domestic appliance

Control unit, a computing unit and in particular in addition to the arithmetic unit, a memory unit with a stored therein control and / or control program, which is intended to be executed by the arithmetic unit. Particularly advantageously, the control unit is provided to the line switching elements and the

Actuate column switching elements as inverter switching elements, in particular such that a soft switching operation between at least a first switching state and a second switching state of the switching elements occurs. A "soft switching operation" is to be understood as meaning, in particular, a switching operation with a negligibly low power loss, which occurs in particular when the switching operation is preferably at least substantially free of stress. zero voltage switching (ZVS) "is to be understood, in particular, a soft switching operation, in which a voltage, in particular immediately before a switching operation on the ij-th heating matrix element and in particular on the ij-th inductor and / or falls, at least essentially

vanishingly small, in particular essentially zero. In particular, the control unit is provided to the switching elements in an at least in

Substantially stress-free switching operation to switch with a switching frequency which is greater than a resonance frequency of the ij-th heating matrix element. A "vanishingly small value" is to be understood in particular as a value which in particular at least by a factor of 10, preferably by at least a factor of 50, preferably by at least a factor of 100, and more preferably by at least a factor of 500 less than an operating maximum value. A "heating matrix" is to be understood as meaning, in particular, a raster of a circuit-wise arrangement of i, j-th heating matrix elements. <br/><br/> The i, j-th heating matrix element is in particular at least indirectly and preferably directly connected to both the i-th row switching element and the j-th column switching element In this context, it should be understood, in particular, that a connection between the electrical components is free of at least one further electrical component, which has a phase between a current and a voltage and / or or preferably a current and / or a voltage itself. Particularly preferably, the i, j-th inductor at least one, in particular exactly one i, j-th connection, which with both the i-th

Row switching element, in particular with a first terminal of the ith

Row switching element, as well as with the j-th column switching element, in particular with a second terminal of the j-th column switching element connected. An "inductor" is to be understood in particular as meaning an electrical component which is provided in at least one cooking operating state, at least partially at least one cooking utensil which is mounted on the cooking surface plate of the cooking appliance

Household appliance device is positioned to heat inductively. The inductor comprises at least one, preferably in the form of a circular disk, wound electrical conductor which is traversed in at least the Garbetriebszustand of a high-frequency heating current. The inductor is preferably designed to convert electrical energy into an alternating magnetic field in order to cause eddy currents and / or re-magnetization effects in the cooking utensil, which are converted into heat.

By a corresponding configuration can advantageously a

Household appliance device with improved properties in terms of efficiency, in particular a cost-efficiency and / or energy efficiency, are provided. Advantageously, a particularly soft and thus energy-efficient switching operation can be achieved. In particular, a number of switching elements can be reduced because switching elements operate in part several inductors, which component costs can be saved. Further advantageous, different inductors of the heating matrix can be controlled individually, thereby reducing energy consumption and In particular, an electrical stray field can be reduced. Particularly advantageously, the abovementioned arrangement makes it possible to switch the switching elements soft, in particular at least substantially without voltage, as a result of which switching losses can be reduced. Furthermore, an advantageous detection of cooking utensils can be made possible, wherein additional components, such as sensor elements, can be avoided.

In order to reduce a space required for the inductors and in particular to achieve an efficient spatial arrangement of the inductors for a cooking operation of cooking utensils, it is further proposed that the inductors are arranged spatially in an inductor matrix, which is relative to a neighborhood ratio of at least two of the inductors is different from the heating matrix, in which the inductors are arranged in a circuit diagram. An "inductor matrix" is to be understood in particular as meaning a grid of a spatial arrangement of the inductors below a cooking field plate of the household appliance device

Neighborhood Ratio "is to be understood in particular that nearest neighbors of i, j-th inductors in the inductor matrix are not nearest neighbors of i, j-th inductors in the heating matrix.

In a preferred embodiment of the invention, it is proposed that in the inductor matrix the inductors are spatially arranged such that at least one i, j-th inductor, for which i = j in the heating matrix, adjoins at least one i, j-th inductor is, for which \ \ in the heating matrix applies. An "ij-th inductor for which i = j in the heating matrix" is to be understood as meaning, in particular, a diagonal inductor which is arranged on a diagonal of the heating matrix, under a "ij-th inductor for which \ Φ \ in the heating matrix applies "should in particular a

Outside diagonal inductor, which outside a diagonal of the

Heating matrix is arranged. Preferably, at least one ij-th inductor is arranged between at least two ij-th inductors, for which i = j in the heating matrix, for which \ Φ \ in the heating matrix applies. Particularly preferred is an ij-th inductor for which i = j in the heating matrix, of several, in particular of at least three, preferably of at least four, and more preferably of at least five ij-th inductors, for which \ Φ \ in the heating matrix , surrounded, preferably surrounded annular. Alternatively, it is conceivable that the heating matrix is free of ij-th heating matrix elements and in particular ij-th inductors for which i = j in the heating matrix. In this way, a control of the household appliance device can be further simplified, since in particular a simultaneous operation of Diagonalinduktoren can be avoided.

In a particularly preferred embodiment of the invention, it is proposed that in the inductor matrix i, j-th inductors of the same i or the same j adjacent to each other and preferably directly adjacent to each other. In particular, the ij-th inductors of the same i or the same j are arranged in a same row or column of the heating matrix. In particular, i, j-th inductors of the same i or j are arranged grouped together and form in particular at least partially, preferably at least to a large extent and particularly preferably completely at least one heating zone for a cooking utensil. More preferably, i, j-th inductors of different i or j at least partially form different heating zones. In this way, a control of the household appliance device can be further simplified, since in particular a simultaneous operation of at least two ij-th inductors, for which i = j in the heating matrix applies, can be avoided particularly advantageously.

It is conceivable that the total number N + M of column switching elements and

Line switching elements is less than or equal to the number N * M of Heizmatrixelementen. In order to operate a number N * M of heating matrix elements with the smallest possible total number N + M of column switching elements and row switching elements and to advantageously reduce component costs, it is proposed that the number N of

Column switching elements is equal to the number M of row switching elements. In particular, the heating matrix is then formed as a square matrix.

To an unwanted activation of at least two Diagonalinduktoren

It is suggested that the total number N + M of

Column switching elements and row switching elements is one greater than the number N * M of heating matrix elements. In this case, the heating matrix is in particular as a vector, preferably a row vector, in particular if the number N of the

Line switching elements equal to 1, or as a column vector, in particular when the number M of the column switching elements is equal to 1 formed. Furthermore, it is proposed that the ij-th heating matrix element has at least one ij-th diode, by means of which the ij-th inductor at least with the i-th Row switching element is connected. In particular, the i, jth diode is at the i, jth terminal between the i, jth inductor and the ith row switching element

connected. In particular, the i, jth diode allows a current to flow in the direction of the i-th row switching element and preferably blocks a current flow in the direction of the i, j-th inductor. In particular, in the case where the number of line switching elements is equal to 1, the i, j th diode can be dispensed with. In addition, in particular, a flyback diode and / or a damping capacitor of the household appliance device could be connected in parallel to the j-th column switching element. With further advantage, the i, j-th heating matrix element has at least one further jth diode, by means of which the i, jth inductor is connected at least to the jth column switching element. In particular, the i, jth additional diode is connected to the i, jth terminal between the i, jth inductor and the jth column switching element. In particular, the i, jth diode allows a current to flow in the direction of the i, j-th inductor and preferably blocks a current flow in the direction of the j-th column switching element. Further, in the case where the number M of column switching elements is 1, the other i, j-th diode can be dispensed with. In addition, in particular, a flyback diode and / or an attenuation capacitor could be connected in parallel to the i-th row switching element. In this way, in particular an uncontrolled flow of current, in particular between a plurality of heating matrix elements, can be avoided. It is further proposed that the i, j-th heating matrix element at least one i, j-th

Has capacitance, by means of which the i, j-th inductor is connected to at least one reference potential common to the heating matrix elements. That the

Heating matrix elements common reference potential is in particular the

Operating potential. In addition, the i, j-th heating matrix element has, in particular, at least one further, jth capacitance, by means of which the i, jth inductor is connected to at least one further reference potential common to the heating matrix elements. The further common reference potential common to the heating matrix elements is in particular the further operating potential. The i, j-th capacity comprises at least one capacitor. The capacitance may preferably comprise a plurality of capacitors, in particular a capacitor network, which preferably consists of capacitors connected at least partially in series and / or in parallel. Furthermore, the capacity can be adjustable in particular. The i, j-th inductor has in particular at least one i, j-th further connection, which with both the ij-th capacity and is connected to the i, j-th further capacity. In this way, advantageously, a natural frequency of a resonant circuit of the household appliance device can be matched to the field of application by an appropriate choice of the capacities. Furthermore, it is proposed that the heating matrix comprises a number N of row diodes, wherein the ith row diode at least the ith row switching element with at least one further reference potential common to the row switching elements,

especially the further operating potential, connects. In particular, in the event that the switching diode connects the i-th row switching element with a reference potential common to the row switching elements, the switching diode is the i-th row diode. It is further proposed that the heating matrix comprises a number M of column diodes, the jth column diode connecting at least the jth column switching element with at least one reference potential common to the column switching elements, in particular the operating potential. In particular, for the case that the switching diode connects the j-th column switching element with a reference potential common to the column switching elements, the switching diode is the jth column diode. This allows a particularly soft switching operation can be achieved.

It is further proposed that the control unit in at least one

Gargeschirrerkennungsmodus is provided for when an operating voltage assumes an at least substantially vanishingly small value to determine at least one occurring at least one of the inductors electrical characteristic. The electrical parameter is preferably correlated with an electromagnetic coupling of the inductor with a cooking utensil, in particular with a degree of coverage and / or a material of the cooking utensil. In particular, the

Close control unit at least on the basis of the electrical characteristic on the electromagnetic coupling of the inductor with the cooking utensils and preferably determine this. The electrical parameter corresponds in particular to a direct

Control variable. Advantageously, the electrical parameter is an electrical signal and / or an electronic signal, in particular measured by a sensor unit of the household appliance device. Preferably, the electrical characteristic is a frequency, amplitude and / or phase of a voltage applied to the inductor and / or a current flowing through the inductor. This can a flexibility of the household appliance device can be improved, since cookware can be detected.

It is further proposed that the control unit be in the

Gargeschirrerkennungsmodus is provided to first charge the inductor and then, when an operating voltage assumes an at least substantially vanishingly low value to recharge. Advantageous is the

Control unit in the cooking dish detection mode provided to detect a characteristic of a discharge of the inductor and to determine the electrical characteristic by means of this characteristic. The characteristic is in particular a time course of the electrical parameter. In particular, the control unit is provided to determine the electrical characteristic value by adapting a comparison characteristic curve to the characteristic curve, in particular based on parameters for generating the comparison characteristic curve. This can be done in a simple manner, a discharge of the inductor, which can be avoided that a short circuit with other electrical components.

In particular, the household appliance device should not be limited to the application and embodiment described above. In particular, the

Domestic appliance device to fulfill a function described herein one of a number of individual elements, components and

Units have different numbers. Preferably, in the value ranges indicated in this disclosure, values lying within the stated limits should also be regarded as disclosed and as applicable

Further advantages emerge from the following description of the drawing. In the drawing, several 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.

Show it:

Fig. 1 shows a household appliance with a household appliance device in one

schematic plan view, 2 is a schematic circuit diagram of a part of the household appliance device with a heating matrix,

3 shows a part of the household appliance device with an inductor matrix in a schematic plan view,

4 is a schematic flowchart of a method for operating the

5 a, b show various diagrams of typical current and / or voltage characteristics in an operation of the household appliance device, FIG.

Fig. 6 a, b different graphs with typical power and / or

Voltage curves in an operation of the household appliance device, Fig. 7 shows another household appliance device in a circuit diagram

Presentation,

Fig. 8 shows another household appliance device in a circuit diagram

Presentation,

Fig. 9 shows another household appliance device in a circuit diagram

Presentation,

Fig. 10 shows another household appliance device in a circuit diagram

Presentation,

Fig. 11 shows a further household appliance device in a circuit diagram

Presentation,

Fig. 12 shows a further household appliance device in a circuit diagram

Presentation and

Fig. 13 shows another household appliance device in a circuit diagram

Presentation.

Fig. 1 shows a household appliance 48a with a household appliance device in a schematic plan view. The household appliance 48a is designed in the present case as a cooking appliance. The household appliance 48a is a hob, in particular a variable induction hob. Alternatively, the household appliance 48a may be designed as any domestic appliance 48a, in particular cooking appliance, which differs from a cooking hob and, in particular, appears to be advantageous to a person skilled in the art, for example as a microwave or an induction baking oven. The household appliance device has a hob plate 50a. The

Household appliance device is intended to operate at least one cooking utensil, which is arranged at an arbitrary position on the hob plate 50a. The cooktop panel 50a includes preferred heater zone locations 52a that identify preferred positions for cookware. In the present case, the hob plate 50a has six preferred heating zone positions 52a. For a better overview, only one of the preferred heating zone positions 52a is provided with a reference numeral. In particular, the hob plate 50a may have any number of preferred ones

Have heating zone positions 52a or no preferred heating zone positions 52a.

Fig. 2 shows a schematic diagram of a part of the household appliance device. The home appliance device comprises at least a number N of row switching elements 10a. Furthermore, the household appliance device comprises at least a number M of column switching elements 12a. The household appliance device comprises at least one heating matrix 14a. The heating matrix 14a has at least one i, j-th heating matrix element 16a for any i from 1 to N and any j from 1 to M. The heating matrix 14a has a number N * M of heating matrix elements 16a. A total of N + M of

Row switching elements 10a and column switching elements 12a is greater than 2. Die

The total number N + M of row switching elements 10a and column switching elements 12a is less than or equal to the number N * M of heating matrix elements 16a. In the present case, the household appliance device has a number of N = 8 line switching elements 10a. In the present case, the household appliance device has a number of N = 3 column switching elements 12a. In addition, the household appliance device has a number of N * M = 24 heating matrix elements 16a. However, it is also conceivable that N and / or M can be any other natural number, which is considered by a skilled person to be particularly advantageous. Alternatively or additionally, a number N may be chosen equal to a number M or such that the total number N + M is greater than the number N * M by one.

In the following, by way of example with reference to the i-th, j-th and i J-th electrical components of the household appliance device, an arrangement, in particular a circuit diagram, of the electrical components of the household appliance device is explained. The following explanations can be transferred to other, equivalent electrical components. The i-th row switching element 10a is formed as a transistor. The i-th row switching element 10a has a first terminal. The first port is a source port. The first terminal of the i-th row switching element 10a is connected to the i, jth heating matrix element 16a. The i-th row switching element 10a has a second terminal. The second port is a drain port. The second

Terminal of the ith row switching element 10a is connected to a reference potential 30a common to the row switching elements 10a. The reference potential 30a common to the row switching elements 10a is an operating potential of an operating voltage, preferably a ground potential. The household appliance device has

in particular a rectifier, which converts a mains voltage at least partially into the operating voltage. In this case, the operating voltage is the voltage which is present between the reference potential 30a common to the row switching elements 10a and a further reference potential 32a common to the column switching elements 12a. The i-th row switching element 10a has a control terminal. Of the

Control terminal is a gate terminal. The control terminal is connected to a control unit 38a of the household appliance device.

The jth column switching element 12a is formed as a transistor. The jth

Column switching element 12a has a first terminal. The first port is a source port. The first terminal of the jth column switching element 12a is connected to the further reference potential 32a common to the column switching elements 12a. The further reference potential 32a common to the column switching elements 12a is the further operating potential. The jth column switching element 12a has a second terminal. The second port is a drain port. The second

Terminal of the jth column switching element 12a is connected to the i, jth heating matrix element 16a. The jth column switching element 12a has a control terminal. The control terminal is a gate terminal. The control terminal is connected to the control unit 38a of the home appliance device.

The ith row switching element 10a and the jth column switching element 12a are arranged in a half-bridge topology. It is conceivable that the household appliance device i-th comprises further row switching elements 10a and jth further column switching elements 12a, so that the ith row switching elements 10a, the ith further ones Row switching elements 10a, the jth column switching elements 12a and the jth further column switching elements 12a may be arranged in a full-bridge topology.

The ith row switching element 10a and the jth column switching element 12a serve as inverter switching elements. The i-th row switching element 10a and the jth

Column switching element 12a together form at least one i-th inverter unit 54a of the household appliance device. In particular, the household appliance device comprises a number N * M of inverter units 54a. The control unit 38a is provided to drive the i-th row switching element 10a and the jth column switching element 12a as inverter switching elements. The control unit 38a controls the i-th row switching element 10a and the jth column switching element 12a so that a smooth switching operation occurs between at least a first switching state and a second switching state of the i-th row switching element 10a and the j-th column switching element 12a.

The i, j-th heating matrix element 16a has at least one i, jth inductor 18a. The i, j-th inductor 18a is connected to both the ith row switching element 10a and the jth

Column switching element 12a connected. The i, j-th inductor 18a has at least one i, j-th terminal 20a. The i, j-th terminal 20a is connected both to the i-th row switching element 10a, in particular to the first terminal of the ith row switching element 10a, and to the jth column switching element 12a, in particular to the second terminal of the jth column switching element 12a , connected. In the heating matrix 14a, a total of N * M inductors 18a are arranged in a circuit diagram.

The i, j-th heating matrix element 16a has at least one i-th diode 24a. By means of the i-th diode 24a, the i-th inductor 18a is connected at least to the i-th row switching element 10a. A first terminal of the i, jth diode 24a is connected to the ijth terminal 20a of the i, jth inductor 18a. A second terminal of the i-th diode 24a is connected to a first terminal of the i-th row switching element 10a. The ij-th diode 24a allows a current flow in the direction of the i-th row switching element 10a. The ij-th diode 24a blocks a current flow in the direction of the i, jth inductor 18a.

The ij-th heating matrix element 16a has at least one ij-th further diode 26a. By means of the i, jth further diode 26a, the ij-th inductor 18a is at least the jth

Column switching element 12a connected. A first terminal of the i-th further diode 26a is connected to the i, j-th terminal of the i, j-th inductor 18a. A second terminal of the i, jth further diode 26a is connected to the second terminal of the jth

Column switching element 12a connected. The i, jth additional diode 26a allows one

Current flow in the direction of the i, jth inductor 18a. The i, jth additional diode 26a blocks a current flow in the direction of the jth column switching element 12a.

The i, j-th heating matrix element 16a has at least one i, jth capacitance 28a. The i, j-th capacitance 28a is a capacitor. By means of the i, jth capacitance 28a, the ijth inductor 18a is connected at least to a reference potential 30a common to the heating matrix elements 16a. The reference potential 30a common to the heating matrix elements 16a is the operating potential. A first terminal of the i, jth capacitance 28a is connected to an i, jth further terminal 42a of the i, jth inductor 18a. A second terminal of the i, j th capacitance 28a is connected to the common reference potential 30a.

An i, j-th heating matrix element 16a has at least one i, jth additional capacity 29a. The i, jth additional capacitance 29a is a capacitor. By means of the further i, jth capacitance 29a, an i, jth inductor 18a is connected at least to a further reference potential 32a common to the heating matrix elements 16a. The further reference potential 32a common to the heating matrix elements 16a is a further operating voltage. A first terminal of the i, jth further capacitance 28a is connected to an i, jth further terminal 42a of the i, jth inductor 18a. A second terminal of the i, jth capacitance 28a is connected to the further reference potential 32a common to the heating matrix elements 16a. Alternatively or additionally, the ijth capacity 28a may be considered to be a

Capacitor network may be formed, which comprises a plurality of capacitors in series and / or parallel capacitors.

The household appliance device has a number M of column diodes 36a. The jth column diode 36a connects at least one j-th column switching element 12a to at least one reference potential 30a common to the column switching elements 12a. The reference potential 30a common to the column switching elements 12a is equal to a reference potential 30a common to the row switching elements 10a. A first terminal of the j-th column switching element 12a is connected to a further reference potential 32a common to the column switching elements 12a. A second terminal of the jth column switching element 12a is connected to a first terminal of a jth column diode 36a. The jth column diode 36a blocks a current in the direction of the Column switching elements 12a common reference potential 30a. The jth column diode 36a allows a current from the direction of the common reference potential 30a to the column switching elements 12a.

The home appliance device has a number N of line diodes 34a. The ith line diode 34a connects at least one i th line switching element 10a to at least one further reference potential 32a common to the line switching elements 10a. The further reference potential 32a common to the row switching elements 10a is a further operating voltage. The further reference potential 32a common to the row switching elements 10a is equal to the further reference potential 32a common to the column switching elements 12a. A first terminal of the i-th row diode 34a is connected to a first terminal of the i-th row switching element 10a. A second terminal of the ith line diode 34a is connected to the further reference potential 32a common to the row switching elements 10a. The ith line diode 34a blocks a current from the direction of the further reference potential 32a common to the row switching elements 10a. The i-th row diode 34a allows a current from the direction of the further reference potential 32a common to the row switching elements 10a.

FIG. 3 shows a plan view of a part of the household appliance device with an inductor matrix 22a. In the present case, i J -th inductors 18a of the same i in FIG. 3 are provided with the same hatching. Inductors 18a, for which i = j in the

Heating matrix 14a is valid, are additionally marked with a dot. The i, j-th inductors 18a are spatially arranged in the inductor matrix 22a. The inductor matrix 22a is different than the heating matrix 14a with respect to neighborhood ratios of at least two of the i, j-th inductors 18a relative to each other. In the inductor matrix 22a, i, j-th inductors 18a of the same i or j are adjacent to each other. In the inductor matrix 22a, the i, j-th inductors 18a are arranged spatially so that at least one ij-th inductor 18a, for which i = j in the heating matrix 14a, is adjacent to at least one i, j-th inductor 18a, for which \ \ in the heating matrix 14a applies. An ij-th inductor 18a, for which i = j in the heating matrix 14a, is of several, in particular of at least three, preferably of at least four, and more preferably of at least five i, j-th inductors 18a, for which \ Φ \ in the heating matrix 14a, surrounded, preferably surrounded annular.

4 shows a method for controlling the household appliance device. In the present case, the method is based on an exemplary operation of the electrical components with the indices i = 1 and i = 2, as well as the electrical components with the indices j = 1 and j = 2 described. The method can be equivalently transferred to any other i-th electrical components and j-th electrical components.

The method includes an operation 56a. In the operation 56a, the control unit 38a drives the 2nd line switching element 10a and the 1st column switching element 12a as inverter switching elements. The 2nd line switching element 10a and the 1st column switching element 12a alternately go from a first switching state to a second switching state by a switching operation. The second row switching element 10a and the 1st column switching element 12a connect the 2, 1-th heating matrix element 16a, in particular the 2, 1-th inductor 18a, alternately with the reference potential 30a common to the row switching elements 10a and the further reference potential common to the column switching elements 12a 32a. The second line switching element 10a and the 1st column switching element 12a generate a supply voltage with which the 2, 1-th heating matrix element 16a, in particular the 2, 1-th inductor 18a, is operated. Through the 2, 1-th heating matrix element 16a, in particular the 2.1 th inductor 18a, a heating current flows.

The method includes a cooking dish detection mode 40a. Of the

Garware detection mode 40a is timed to coincide with operation 56a. Alternatively, the cooking dish detection mode 40a may be independent of the

Operation step 56a done. The cooking dish detection mode 40a includes a loading step 58a. In the charging step 58a, the control unit 38a controls the 1-th

Column switching element 12a so that this merges into a first switching state. The 1, 1-th heating matrix element 16a, in particular the 1, 1-th capacitance 28a, is loaded by means of the 1-th column switching element 12a on the further reference potential 32a common to the column switching elements 12a. The control unit 38a activates the 1-th row switching element 10a such that it is in a second switching state and thus does not establish a conductive connection with the reference potential 30a common to the row switching elements 10a. There is no current flowing, which maintains the charged voltage. In the same way, the 2, 2-th

Heating matrix element 16a, in particular the 2, 2 nd capacity 28a, loaded with the 2d line switching element 10a provided, the line switching elements 10a common reference potential 30a. In the charging step 58a, the Control unit 38a, the second line switching element 10a, so that this goes into a second switching state. The 2, 2-th heating matrix element 16a, in particular the 2, 2-th capacity 28a, is common to the line switching elements 10a

Reference potential 30a loaded. The control unit 38a controls the 2nd one

Column switching element 12a so that this is in the second switching state and thus no conductive connection to the column switching elements 12a

common further reference potential 32a is produced. There is no current flowing, which maintains the charged voltage.

The cooking dish detection mode 40a includes a discharge step 60a. Of the

Discharge step 60a is performed during the operation step 56a. The

Operating voltage applied between the 2 nd line switching element 10a and the 1 th column switching element 12a varies with time. If the operating voltage assumes an at least substantially negligible value, the discharging step 60a is carried out. The control unit 38a discharges the 1, 1-th heating matrix element 16a. For this purpose, the control unit 38a switches the first line switching element 10a into the first one

Switching state. The 1-th row switching element 10a connects the 1, 1-th heating matrix element 16a, in particular the 1, 1-th capacity 28a, with the reference potential 30a common to the row switching elements 10a. The heating matrix element 16a, in particular the 1, 1-th capacitor 28a, discharges. A characteristic curve 46a of the discharge process is detected. A further characteristic curve 47a of the discharge process is detected.

The cooking dish detection mode 40a includes a determining step 62a. In the determination step 62a, a comparison characteristic curve is adapted to the characteristic curve 46a detected in the discharging step 60a and in particular to the further characteristic curve 47a. From parameters of the comparison characteristic, a quality of an electromagnetic coupling is determined. From the quality of the electromagnetic coupling is also a

Level of coverage between the 1, 1-th inductor 18a and one with the 1, 1-th inductor 18a coupled cooking utensils and / or a material of the cooking utensils determined.

Fig. 5a shows a diagram of the method for controlling the household appliance device. A time is plotted on an abscissa axis 64a. On an ordinate axis 66a, a voltage is plotted. A first voltage curve 68a shows a temporal

Course of the supply voltage, which is applied to the 2.1-th heating matrix element 16a. A second voltage curve 70a shows a time course of a voltage, which is applied to the 1, 1-th heating matrix element 16a. A third voltage curve 72a shows a time profile of a voltage which is applied to the 1, 2-th heating matrix element 16a. A fourth voltage curve 74a shows a time profile of a voltage which is applied to the 2.2-th heating matrix element 16a. A fifth voltage curve 76a shows a time profile of the operating voltage. In Fig. 5b, the curves 68a, 70a, 72a, 74a, 76a are shown again. FIG. 5b shows a region of the graph of FIG. 5a at a time T at which the operating voltage assumes an at least substantially negligible value. In FIG. 5b, the abscissa axis 64a has a finer scaling than in FIG. 5a. Fig. 6a shows a diagram of the method for controlling the household appliance device. A time is plotted on an abscissa axis 64a. On a ordinate axis 66a, a current is applied. A first current curve 80a shows a time profile of the heating current which flows through the 2, 1-th heating matrix element 16a. A second

Current curve 82a shows a time profile of a current flowing through the 1, 1-th heating matrix element 16a. A third current curve 84a shows a current flowing through the 1, 2-th heating matrix element 16a. A fourth current waveform 86a shows a current flowing through the 2.2-th heating matrix element 16a. FIG. 6b shows a region of the graph of FIG. 6a at a time T at which the operating voltage assumes an at least substantially negligible value. In FIG. 6b, the abscissa axis 64a has a finer scaling than in FIG. 6a.

The second current curve 82a and the second voltage curve 70a show the charging step 58a of the 1, 1-th heating matrix element 16a. In the charging step 58a, the 1, 1-th

Heating matrix element 16a loaded with the column switching elements 12a common further reference potential 32a. In the discharge step 60a, as soon as the operating voltage, the fifth voltage curve 76a, assumes an at least substantially vanishing value, the 1, 1-th heating matrix element 16a is discharged. A current flows, which corresponds to the second current curve 82a. The second voltage curve 70a is detected. The second voltage characteristic serves as a characteristic 46a for determining the electrical parameter. The second current curve 82a is detected. The second current curve 82a serves as a further characteristic 47a for determining the electrical parameter.

In Figs. 7 to 13 further embodiments of the invention are shown. The following description and the drawings are essentially limited to the differences between the embodiments, wherein with respect to the same designated components, in particular with respect to components with the same reference numerals, in principle, on the drawing and / or the description of the other

Embodiments, in particular of Figures 1 to 6, can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the figures 1 to 6 adjusted. In the exemplary embodiments of FIGS. 7 to 13, the letter a is replaced by the letters b, f, g, h, k, p and q.

Fig. 7 shows a circuit diagram of another embodiment of the invention. The further embodiment differs from the previous embodiment at least substantially with respect to a number N and a number M. Im

In this case, a number N of row switching elements 10b is equal to the number M of column switching elements 12b. Further, the total number N + M of

Row switching elements 10b and column switching elements 12b less than or equal to the number Ν ^χ Μ of heating matrix elements 16b. In the present case, the number N = 4 and the number M = 4. In the present case, at least the i-th row switching element 10b, in particular all row switching elements 10b, and / or at least the jth

Column switching element 12b, in particular all column switching elements 12b, as a switch, preferably relay formed. Furthermore, the household appliance device has an additional inverter unit 54b. The inverter unit 54b has a first inverter element 88b. Furthermore, the inverter unit 54b has a second inverter element 89b. The inverter elements 88b, 89b are as

Transistors formed. The inverter element 88b connects the

Row switching elements 10b with a row switching elements 10b common reference potential 30b. The further inverter element 89b connects the

Column switching elements 12b with the column switching elements 12b common further reference potential 32b.

8 shows a further embodiment of the invention. The further

Embodiment differs from the previous embodiment, at least substantially with respect to a number N and a number M. The

Total number N + M of row switching elements 10f and column switching elements 12f is one greater than the number Ν ^χ Μ of heating matrix elements 16f. In the present case is the number N = 2 and the number M = 1. The heating matrix 14f forms a circuit-vector, in particular a column vector. In one embodiment, for which the total number N + M is greater than the number N by one, it is possible to dispense with i, 1-th diodes 24f. 9 shows a further embodiment of the invention. The further

Total number N + M of row switching elements 10g and column switching elements 12g is one greater than the number N * M of heating matrix elements 16g. In the present case, the number N = 2 and the number M = 1. The heating matrix 14g forms a circuit-vector, in particular a column vector. In one embodiment, for which the total number N + M is greater than the number N by one, it is possible to dispense with i, 1-th diodes 24g. The home appliance device has a number of N

Return diodes 90g up. The ith return diode 90g is connected to the i-th row switching element 10g. The ith return diode 90g is connected in parallel with the i-th row switching element 10g. A first terminal of the flyback diode 90g is connected to a first terminal of the i-th row switching element 10g. A second terminal of the ith return diode 90g is connected to a second terminal of the i-th row switching element 10g. The ith return diode 90g blocks a current flow in the direction of the reference potential 30g common to the row switching elements 10g. The ith return diode 90g allows current to flow from the direction of the row switching elements 10g

common reference potential 30g too. Alternatively or additionally, the

Household appliance device having a number of further return diodes 90 g. A jth further flyback diode 90g could be connected in parallel with a jth column switching element 12g. Furthermore, it is possible to dispense with a column diode in the present case.

Fig.10 shows another embodiment of the invention. The further

Embodiment differs from the previous embodiment, at least substantially with respect to a number of additional electrical components. The present embodiment differs by a circuit of line diodes 34h. In the present case, the ith line diode 34h is connected to an i, jth terminal 20h of an i, jth inductor 18h. A first connection of the ith Row diode 34h is connected to the i, jth terminal 20h. A second terminal of the ith line diode 34h is connected to a further reference potential 32h common to the row switching elements 10h. The i-th row diode 34h blocks a current from the direction of the further common to the row switching elements 10h

Reference potential 32h. The ith line diode 34h allows a current to flow from the direction of the further reference potential 32h common to the row switching elements 10h.

Fig.1 shows a further embodiment of the invention. The further

Embodiment differs from the previous embodiment, at least substantially with respect to a number of additional electrical components. The home appliance device has a number N of line capacitances 92k. The i-th row capacitance 92k is connected in parallel with an i-th row switching element 10k. Further, an ith return diode 90k is connected in parallel to an i-th row switching element 10k. A first terminal of the i-th row capacitance 92k is connected to a first terminal of the ith row switching element 10k. A second terminal of the i-th row capacitance 92k is connected to a second terminal of the ith row switching element 10k. Furthermore, it is possible to dispense with a column diode in the present case.

Fig.12 shows another embodiment of the invention. The further

Total number N + M of row switching elements 10p and column switching elements 12p is one greater than the number Ν ^χ Μ of heating matrix elements 16p. In the present case, the number N = 1 and the number M = 2. The heating matrix 14p forms a circuit-vector, in particular a row vector. In one embodiment, for which the total number N + M is greater than the number N by one, j, 1-th further diodes can be dispensed with. The household appliance device has a number of M further return diodes 91 p. The jth further flyback diode 91p is connected to the jth column switching element 12p. The jth further flyback diode 91p is connected in parallel with the jth column switching element 12p. A first connection of the others

The flyback diode 91p is connected to a first terminal of the j-th column switching element 12p. A second terminal of the jth further flyback diode 91p is connected to a second terminal of the jth column switching element 12p. The jth further flyback diode 91p allows current to flow in the direction of the column switching elements 12p common reference potential 32p. The jth further flyback diode 91p blocks a current flow from the direction of the reference potential 32 common to the column switching elements 12p. Alternatively or additionally, the household appliance device may have a number of flyback diodes 90p. An ith return diode 90p could be connected in parallel with an ith row switching element 10p. Furthermore, it is possible to dispense with a line diode in the present case.

Fig. 13 shows another embodiment of the invention. The further

Embodiment differs from the previous embodiment, at least substantially with respect to a number of additional electrical components. The home appliance device has a number M of column capacitances 93q. The jth column capacitance 93q is connected in parallel with a jth column switching element 12q. A first terminal of the jth column capacitance 93q is connected to a first terminal of the jth column switching element 12q. A second terminal of the jth column capacitance 93q is connected to a second terminal of the jth column switching element 12q. Furthermore, it is possible to dispense with an i-th row diodes 34.

reference numeral

10 line switching element

12 column switching element

14 heating matrix

16 heating matrix element

18 inductor

20 connection

22 inductor matrix

24 diode

26 more diode

28 capacity

29 capacity

30 reference potential

32 Further reference potential

34 line diode

36 column diode

38 control unit

40 cookware detection mode

42 Further connection

46 characteristic

47 characteristic

48 home appliance

50 hob plate

52 heating zone position

54 inverter unit

56 operation step

58 charging step

60 unloading step Determination step abscissa axis ordinate axis first voltage curve second voltage curve third voltage curve fourth voltage curve fifth voltage curve first current curve second current curve third current curve fourth current curve inverter element inverter element flyback diode further flyback diode line capacitance column capacitance time

Claims

claims

Household appliance device, in particular cooking appliance device, having at least a number N of row switching elements (10a-q), with at least a number M of column switching elements (12a-q) and with at least one heating matrix (14a-q) comprising at least a number N * M of heating matrix elements (16a-q), where for any i from 1 to N and any j from 1 to M with a

Total number N + M of row switching elements (10a-q) and

Column switching elements (12a-q) greater than 2 holds that the i, j-th

Heating matrix element (16a-q) comprises at least one i, jth inductor (18a-q) and both the ith line switching element (10a-q) and the jth

Column switching element (12a-q) is connected, and at least one switching diode (34a-q, 36a-q), which at least one of the row switching elements (10a-q) or at least one of the column switching elements (12a-q) with at least one

Reference potential (30a-q, 32a-q) connects.

Domestic appliance device according to claim 1, characterized in that the i, j-th inductor (18a-q) has at least one i, j-th terminal (20a-q) connected both to the i-th row switching element (10a-q) is also connected to the jth column switching element (12a-q).

Domestic appliance device according to claim 1 or 2, characterized in that the inductors (18a-q) are arranged spatially in an inductor matrix (22a) which is different relative to each other with respect to neighborhood ratios of at least two of the inductors (18a-q) from the heating matrix (14a -q), in which the inductors (18a-q) are arranged in a circuit diagram.

4. Household appliance device according to claim 3, characterized in that in the inductor matrix (22a) the inductors (18a-q) are arranged spatially so that at least one ij-th inductor (18a-q), for which i = j in the heating matrix (14a-q) is adjacent to at least one i, jth inductor (18a-q) for which \ \ in the heating matrix (14a).

5. Household appliance device according to claim 3 or 4, characterized in that in the inductor matrix (22a) i, j-th inductors (18a-q) of the same i or the same j are adjacent to each other.

6. Household appliance device according to one of the preceding claims,

characterized in that the number N of row switching elements (10b) is equal to the number M of column switching elements (12b).

7. Household appliance device according to one of claims 1 to 5, characterized

characterized in that the total number N + M of row switching elements (1 of-q) and column switching elements (12f-q) is one greater than the number Ν ^χ Μ of heating matrix elements (16f-q).

8. Household appliance device according to one of the preceding claims,

characterized in that the i, j-th heating matrix element (16a; 16b; 16p; 16q) comprises at least one ij-th diode (24a; 24b; 24p; 24q), by means of which the i, j-th inductor (18a; 18b 18p, 18q) at least with the i-th

Row switching element (10a, 10b, 10p, 10q) is connected.

9. Household appliance device according to one of the preceding claims,

characterized in that the i, j-th heating matrix element (16a-k) has at least one i-th further diode (26a-k), by means of which the i, j-th inductor (18a-k) at least with the j -th column switching element (12a-k) is connected.

10. Domestic appliance device according to one of the preceding claims, characterized in that the i, j-th heating matrix element (16a-q) at least one i, j-th capacity (28a-q), by means of which the i, j-th inductor ( 18a-q) is connected at least to at least one reference potential (30a-q) common to the heating matrix elements (16a-q).

1 1. Household appliance device according to one of the preceding claims,

characterized by a number M of column diodes (36a-f; 36h; 36p; 36q-q), the jth column diode (36a-f; 36h; 36p; 36q-q) including at least the jth column switching element (12a-f ; 12h; 12p; 12q-q) with at least one den

Column switching elements (12a-f; 12h; 12p; 12q-q) common

Reference potential (30a-f; 30h; 30p; 30qq) connects.

12. Household appliance device according to one of the preceding claims,

characterized by a number N of row diodes (34a-k), wherein the ith row diode (34a-k) comprises at least the ith row switching element (10a-k) with at least one other common to the row switching elements (10a-k)

Reference potential (32a-k) connects.

13. Household appliance device according to one of the preceding claims,

characterized by a control unit (38a-q) which is provided for driving the row switching elements (10a-q) and the column switching elements (12a-q).

14. Household appliance device according to claim 13, characterized in that the control unit (38a-q) is provided to drive the row switching elements (10a-q) and the column switching elements (12a-q) as inverter switching elements. Domestic appliance device according to claim 13 or 14, characterized

characterized in that the control unit (38a-q) in at least one

Garware detection mode (40a) is provided when the

Operating voltage assumes an at least substantially vanishingly small value, at least one on at least one of the inductors (18a-q) occurring electrical characteristic to be determined.

Domestic appliance device according to claim 15, characterized in that the control unit (38a-q) is provided in the cooking dish detection mode (40a) to first charge the inductor (18a-q) and then when an operating voltage assumes an at least substantially vanishingly small value to unload again.

Domestic appliance device according to claim 16, characterized in that the control unit (38a-q) is provided in the cooking dish detection mode (40a) to detect a characteristic curve (46a, 47a) of a discharge process of the inductor (18a-d) and by means of this the electrical characteristic to investigate.

Household appliance (48a), in particular cooking appliance, with a

Domestic appliance device according to one of the preceding claims.