EP2888925B1 - Domestic appliance device - Google Patents

Description

The invention relates to a home appliance device according to the preamble of claim 1. The patent US 2012/0205365 A1 shows a home appliance device according to the preamble of claim 1. There are known induction cooktops, each having a switching unit, which is intended to operate two Induktionsheizkreise depending on the situation of a single phase or of two different phases.

The object of the invention is in particular to provide a generic device with improved security. 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 further relates to a method for operating a home appliance device according to claim 10.

The invention is based on a domestic appliance device, in particular a cooktop device, with at least two consumers and at least one switching unit which has at least one first multiple switching component which has at least two synchronous switching elements and is provided, in at least a first operating mode, at least a first of the at least two Connect consumers with a first or at least a second mode of operation with a second power source.

It is proposed that the switching unit has at least one second multiple switching component which has at least two synchronous switching elements and has at least two parallel switching paths and which is intended to connect at least a second of the at least two consumers to the second energy source. A "consumer" is to be understood in particular as an electrical component which is intended to supply electrical energy, in particular with an efficiency of at least 50%, advantageously at least 80%, preferably at least 90%, into another form of energy, in particular thermal energy, electromagnetic Field energy and / or mechanical energy to transform. In particular, the consumer is provided, in at least one operating state, a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W, implement. A "multiple switching component" should be understood to mean a switching component which has at least two synchronous switching elements. A "switching element" is to be understood in particular to mean an element which is intended to produce and / or to separate at least one connection between at least two switching contacts. Preferably, the switching element has at least one control contact, which is intended to define a switching state of the switching element. The term "synchronous" switching elements should be understood in particular to mean switching elements whose switching states change and / or are identical at the same time, the switching elements in particular simultaneously establishing or disconnecting. In particular, synchronous switching elements have a common control contact and / or are switched by a common mechanism. By "parallel" switching elements should be understood in particular switching elements whose eponymous switch contacts are interconnected. In particular, the first multiple switching component is intended to switch a supply and a derivative of at least the first consumer. In particular, the second multiple switching component is intended to switch a supply or a derivative of at least the second consumer. An "energy source" is to be understood, in particular, as a connection terminal which is intended to be connected for operation to a source of electrical energy, in particular to a phase of a domestic power connection. By "different" energy sources in particular two terminals are to be understood, which are intended to be connected to an operation with different sources of electrical energy, which are formed in particular by different phases of a domestic power connection. In particular, the domestic appliance device in each case has supply electronics assigned to an energy source, in particular at least one rectifier unit and / or a filter unit. Currents of different energy sources differ in particular in their phase positions, in particular by at least 20 °, advantageously at least 50 °, preferably at least 100 ° and in particular at most 180 °, and / or in their voltages and / or in their frequencies. The second multiple switching component is preferably arranged between the supply electronics and at least the second consumer. In that a first component "between" a second and a third component is arranged, should be understood in particular that in at least one operating state current in technical or physical current direction, by the first component flows, comes from the second component and flows to the third component. By "provided" is intended to be understood in particular specially programmed, designed and / or equipped. In particular, improved reliability can be achieved. In particular, an improved current carrying capacity can be achieved. In particular, a reduced wear of switching contacts can be achieved.

Furthermore, it is proposed that at least one of the at least two consumers is designed as an induction heating circuit. An "induction heating circuit" is to be understood in particular as meaning an electrical circuit which has at least one heating frequency unit. In particular, the induction heating circuit has at least one resonance capacity and at least one inductor. A "heating frequency unit" should in particular be understood to mean an electrical unit which generates an oscillating electrical signal, preferably with a frequency of at least 1 kHz, in particular of at least 10 kHz, advantageously of at least 20 kHz, and in particular of not more than 100 kHz. In particular, the heating frequency unit is intended 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. In particular, the heating frequency unit comprises at least one inverter, which preferably has at least two bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageously at least one snubber capacitor connected in parallel to the bidirectional unipolar switches. which is in particular formed by at least one capacitor. An "inductor" should in particular be understood to mean a component which is intended to convert alternating current generated by the heating frequency unit into an alternating magnetic field which is provided in a, in particular metallic, advantageously ferromagnetic heating means, in particular a cooking utensil and / or or a radiator, in particular an oven, to be converted by heat by induction currents and / or Ummagnetisierungseffekte. In particular, an advantageous use of the invention can be achieved.

It is also proposed that at least one, in particular at least two, of the multiple switching components, in particular at least the second, at least one relay having. Advantageously, all switching elements of a multiple switching component of a single relay, which is in particular designed as a multi-pole changeover switch formed. In particular, a cost-effective and / or efficient design can be achieved. Alternatively and / or additionally, it is conceivable that at least one of the multiple switching components comprises a semiconductor switching element, in particular a transistor and / or are formed by these, which in particular low switching times can be achieved. In particular, it is conceivable that a multiple switching component of at least one electromechanical switching element and at least one semiconductor switching element is formed, which can compensate in particular advantages and weaknesses of the different types of switching elements.

Furthermore, it is proposed that the first and the second multiple switching component have identical switching elements. By "identical" switching elements are in particular switching elements with an equal number of switching paths and / or to be understood with the same current carrying capacity. In particular, a simple construction can be achieved. In particular, a simple production can be achieved because fewer different components must be maintained.

It is further proposed that the switching unit has at least one third multiple switching component, which is provided in at least one operating mode to connect the third consumer either to the first or to the second energy source. In particular, an increased flexibility with regard to a distribution of a total available power can be achieved.

Furthermore, it is proposed that the first multiple switching component is arranged in at least one operating mode between the second multiple switching component and the first consumer. In particular, the second multiple switching component is provided to prevent at least one operating state, in particular in a switched-off state, a power supply at least to the first consumer, in particular to all consumers. In particular, a component-saving design can be achieved.

Furthermore, it is proposed that the domestic appliance device has at least one second switching unit which is provided in at least one operating mode To connect consumers at least partially with each other, the connection is different from an input-side connection of consumers. In particular, the second switching unit is provided to connect any two of the at least two consumers with each other. In particular, the second switching unit is provided to connect at least one Heizfrequenzeinheit with different inductors and / or Resonanzkapaziäten. Advantageously, the second switching unit is provided to connect a plurality of heating frequency units with an inductor. In particular, a flexible distribution of available power can be achieved. In particular, a boost mode in which power is supplied to an inductor exceeding a maximum power of a single heating frequency unit may be enabled.

It is advantageously proposed that the home appliance device has at least one first and one second connection electronic module, wherein the first connection electronic module is assigned to the first energy source and the second connection electronic module is assigned to the second energy source and wherein the second connection electronic module has a higher current carrying capacity than the first connection electronic module. In that a second connection electronic module has a "higher current carrying capacity" than a first connection electronic module, should be understood in particular that components of the second connection electronics module are designed for a higher average current flow, in particular higher line cross-sections, more efficient heatsink, adapted inductances and / or capacitances , as components of the first connection electronics module. In particular, a component savings and / or cost savings can be achieved.

Alternatively or additionally, it is proposed that a domestic appliance device, in particular a hob device, having at least two consumers and at least one switching unit, wherein the switching unit has a first switching component which is provided, at least a first of the consumer with either a first or a second Energy source to connect, wherein the switching unit has at least a second switching component which is at least provided to connect the first switching component with the second power source. In particular, the second switching component is arranged electrically between the second energy source and the first switching component, is therefore intended to form a circuit that via the second energy source and via the first switching component leads to disconnect. In particular, the second switching component is designed as a single switch, alternatively as a multiple switch with parallelized switching paths. In particular, the second switching component is arranged electrically between an input electronics connected to the second energy source and the first switching component. In particular, the second switching component is provided to connect at least one second of the consumers to the second energy source in at least one operating state.

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, 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 erfindungsgemäßes Kochfeld in einer schematischen Ansicht von oben,

Fig. 2

eine erfindungsgemäße Kochfeldvorrichtung und

Fig. 3

eine alternative erfindungsgemäße Kochfeldvorrichtung.

Figur 1 zeigt ein als Kochfeld ausgebildetes Hausgerät 10 mit einer als Kochfeldvorrichtung ausgebildeten Hausgerätevorrichtung 12. Die Hausgerätevorrichtung 12 ist als Gargeräteinduktionsvorrichtung ausgebildet.Show it:

Fig. 1

an inventive hob in a schematic view from above,

Fig. 2

a hob according to the invention and

Fig. 3

an alternative hob according to the invention.

FIG. 1 shows a cooking appliance designed as a domestic appliance 10 with a cooking appliance designed as a household appliance device 12. The home appliance device 12 is designed as a cooking appliance induction device.

The home appliance device 12 has two consumers 20, 30. The consumers 20, 30 are designed as induction heating circuits. The consumers 20, 30 are intended to be operated independently of one another in a plurality of operating modes ( FIG. 2 ). Furthermore, the domestic appliance device 12 has a switching unit 14 which has a first multiple switching component 40 and a second multiple switching component 50.

The multiple switching components 40, 50 each have two switching paths 42, 44, 52, 54. The multiple switching components 40, 50 are each provided to simultaneously switch their two switching paths 42, 44, 52, 54. The multiple switching components 40, 50 are designed as two-pole switches. The multiple switching components 40, 50 are designed as relays.

The first multiple switching component 40 is provided, in certain operating modes, to connect a first one of the consumers 20 to a first energy source 16, the switching paths 42, 44 being provided in each case to supply or discharge lines of the first consumer 20 to the first energy source 16 connect to. The first multiple switching component 40 is provided to connect the first consumer 20 to a second energy source 18 in further operating modes, the switching paths 42, 44 being provided in each case one of the supply and discharge lines of the first consumer 20 with the second energy source 18th connect to.

The switching paths 52, 54 of the second multiple switching component 50 are parallel to each other. Output-side second contacts of the second multiple switching component 50 are unconnected, whereby the second multiple switching component 50 effectively forms a single-pole power switch. The second multiple switching component 50 is provided to connect or disconnect one of two supply and discharge lines of the second consumer 30 with the second power source 18. The first multiple switching component 40 is disposed between the second multiple switching component 50 and the first consumer 20 in operating modes in which the first multiple switching component 40 is provided to connect the first load 20 to the second power source 18. In operating conditions in which the first multiple switching component 40 is provided to connect the first load 20 to the second power source 18, the second multiple switching component 50 is provided to one of two Zu-

Derivatives of the second consumer 30 with the second power source 18 to connect or disconnect.

The energy sources 16, 18 are each formed by terminals, which are intended to be connected to different phases of a domestic power connection, each having a nominal voltage of 230 V. The home appliance device 12 has two connection electronic modules 60, 70 which are each assigned to one of the energy sources 16, 18. The connection electronics modules 60, 70 each have a filter unit 62, 72, which is intended to prevent transmission of high-frequency interference signals, which are caused by the Induktionsheizkreise, in the power sources 16, 18. The terminal electronics modules 60, 70 each further comprise a rectifier unit 64, 74, which are intended to rectify from the power sources 16, 18 derived alternating current. The connection electronics modules 60, 70 are arranged electrically between the energy sources 16, 18 and the switching unit 14. The first connection electronic module 60, which is assigned to the first energy source 16, has a lower current carrying capacity than the second connection electronic module 70, which is assigned to the second energy source 18. The first connection electronics module 60 has a current carrying capacity of 10 A. The second connection electronic module 70 has a current carrying capacity of 16 A. The first and second multiple switching components 40, 50 are formed by identical switching elements. The switching paths 42, 44, 52, 54 of the multiple switching components 40, 50 each have a current carrying capacity of 10 A. The consumers 20, 30 each have a maximum power consumption of 2300 W.

The home appliance device 12 has a second switching unit 80, which is provided to connect the consumers 20, 30 with each other. The consumers 20, 30 each have a heating frequency unit 22, 32. In operating modes in which the consumers 20, 30 are connected to different energy sources 16, 18, the second switching unit 80 is provided to operate the heating frequency unit 22 of the first consumer 20 with a first or a second inductor 24, 26. The first and second inductors 24, 26 are connected to common resonance capacitances 28. In operating modes in which the consumers 20, 30 are connected to different energy sources 16, 18, the second switching unit 80 is provided to operate the heating frequency unit 32 of the second consumer 30 with a third or a fourth inductor 34, 36. The third and fourth inductors 34, 36 are connected to common resonance capacitances 38. It is achievable a total output, which corresponds to a sum of the maximum power of the heating frequency units 22, 32, and the corresponding connection electronics module 60, 70 and / or energy sources 16, 18.

In operating modes in which the loads 20, 30 are connected to a single energy source 18, the second switching unit 80 is provided to allow any two of the inductors 24, 26, 34, 36 simultaneously with different ones of the heating frequency units 22, 32, or to connect any of the inductors 24, 26, 34, 36 simultaneously with both Heizfrequenzeinheiten 22, 32 to a boost mode, wherein a maximum power of the connection electronics module 70 is exploitable, which is greater than a maximum power of the individual Heizfrequenzeinheiten 22, 32nd ,

By the parallel switching paths 52, 54 of the second multiple switching component 50 a safer line is also possible in simultaneous operation with both consumers 20, 30 at the second power source 18, whereas in the case of the operation of the first consumer 20, regardless of which power source 16, 18th this is connected via the first multiple switching component 40, an operation over two individual switching paths 42, 44 is sufficient because the first consumer 20 individually the current carrying capacity of the switching paths 42, 44 can not exploit.

Since the consumers 20, 30 must be connected to a single energy source 18 anyway for a boost mode, a connection electronics module 60 of the first energy source 16 can be made smaller, which can reduce costs.

In operation, a control unit ensures that the second switching unit 80 only interconnects consumers 20, 30, which are connected via the switching unit 14 to a same power source 18. The control unit is furthermore provided to connect the consumers 20, 30 with different energy sources 16, 18 or with a same energy source 18 as a function of heating powers requested for the inductors 24, 26, 34, 36. The control unit is provided in operating modes in which a heating power is required for a plurality of inductors 24, 26, 34, 36 of a load 20, 30 to operate them in a time-division multiplex method via the heating frequency unit 22, 32 of this load 20, 30. Furthermore, despite an embodiment with only two heating frequency units 22, 32 inductors 24, 26, 34, 36 are operated by different phases, but also a single inductor can be operated in a boost mode.

In the FIG. 3 a further embodiment of the invention is shown. The following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and functions on the description of the embodiment of characters 1 and 2 can be referenced. To distinguish the embodiments of the letter a to the reference numerals of the embodiment in FIG. 3 added. With respect to identically designated components, in particular with regard to components with the same reference numerals, can in principle also to the drawings and / or the description of the embodiment of FIGS. 1 and 2 to get expelled.

FIG. 3 shows a home appliance device 12a with a switching unit 14a. The home appliance device 12a has a first, a second and a third consumer 20a, 30a, 82a. The switching unit 14a has a first and a third multiple switching component 40a, 90a, which are provided, depending on the mode of operation, respectively to connect the first and third consumers 20a, 82a to a first or to a second energy source 16a, 18a. The switching unit 14a has a second multiple switching component 50a which is provided to connect the second load 30a to the second power source 18a. The multiple switching components 40a, 50a, 90a each have two switching paths 42a, 44a, 52a, 54a, 92a, 94a. The switching paths 52a, 54a of the second multiple switching component 50a are connected in parallel with each other. The switching paths 42a, 44a, 52a, 54a, 92a, 94a of the multiple switching components 40a, 50a, 90a each have a current carrying capacity of 16A.

The home appliance device 12a has a first connection electronic module 60a, which is assigned to the first energy source 16a. The first connection electronics module 60a has a current carrying capacity of 16 A. The home appliance device 12a has a second connection electronic module 70a, which is assigned to the second energy source 18a. The second connection electronic module 70a has a current carrying capacity of 25 A. The consumers 20a, 30a, 82a are each designed as induction heating circuits, each having a heating frequency unit 22a, 32a, 84a.

The home appliance device 12a has a second switching unit 80a, which is provided to connect the consumers 20a, 30a, 82a with each other. The first load 20a has a first and a second inductor 24a, 26a, which are connected to common resonance capacitances 28a. The second load 30a has a third inductor 34a connected to resonant capacitances 38a. The third consumer 82a has a fourth inductor 86a connected to resonant capacitances 88a. The second switching unit 80a is intended to be used in operating modes, in which two or three of the consumers 20a, 30a, 82a are connected to a same energy source 16a, 18a, any inductor 24a, 26a, 34a, 86a of these consumers 20a, 30a, 82a simultaneously with all Heizfrequenzeinheiten 22a, 32a, 84a of these consumers 20a , 30a, 82a connect to a boost mode. reference numeral 10 household appliance 74 Rectifier unit 12 Home appliance device 80 switching unit 14 switching unit 82 consumer 16 energy 84 Heizfrequenzeinheit 18 energy 86 inductor 20 consumer 88 resonant capacitance 22 Heizfrequenzeinheit 90 Multiple switching component 24 inductor 92 switching path 26 inductor 94 switching path 28 resonant capacitance 30 consumer 32 Heizfrequenzeinheit 34 inductor 36 inductor 38 resonant capacitance 40 Multiple switching component 42 switching path 44 switching path 50 Multiple switching component 52 switching path 54 switching path 60 Connecting electronic module 62 filter unit 64 Rectifier unit 70 Connecting electronic module 72 filter unit

Claims (10)

1. Domestic appliance apparatus, in particular hob apparatus, having at least two consumers (20, 30; 20a, 30a, 82a) and at least one switching unit (14; 14a), which has at least one first multiple switching component (40; 40a, 90a), which is provided to connect in at least one operating mode at least one first of the at least two consumers (20; 20a, 82a) to a first or, in at least a further operating mode, to a second energy source (16, 18; 16a, 18a), characterised in that the first multiple switching component has at least two synchronous switching elements and the switching unit (14; 14a) has at least one second multiple switching component (50; 50a, 90a), which has at least two synchronous switching elements and at least two parallel switching paths (52, 54; 52a, 54a, 92a, 94a) and which is provided to connect at least one second of the at least two consumers (20, 30; 20a, 30a, 82a) to the second energy source (18; 18a).
2. Domestic appliance apparatus according to claim 1, characterised in that at least one of the at least two consumers (20, 30; 20a, 30a, 82a) is embodied as an induction heating circuit.
3. Domestic appliance apparatus according to one of the preceding claims, characterised in that at least one of the multiple switching components (40, 50; 40a, 50a, 90a) has at least one relay.
4. Domestic appliance apparatus according to one of the preceding claims, characterised in that the first and the second multiple switching component (40, 50; 40a, 50a, 90a) have switching elements of identical construction.
5. Domestic appliance apparatus according to one of the preceding claims, characterised by at least one third consumer (20a, 82a) and in that the switching unit (14; 14a) has at least one third multiple switching component (40a, 90a), which in at least one operating mode is provided to connect the third consumer (20a, 82a) either to the first or to the second energy source (18; 18a).
6. Domestic appliance apparatus according to one of the preceding claims, characterised in that the first multiple switching component (40; 40a, 90a) is arranged in at least one operating mode between the second multiple switching component (50; 50a) and the first consumer (20; 20a, 82a).
7. Domestic appliance apparatus at least according to claim 2, characterised by at least one second switching unit (80), which is provided to interconnect the consumers (20, 30; 20a, 30a, 82a) at least partially in at least one operating mode, wherein the connection differs from an input-side connection of the consumers.
8. Domestic appliance apparatus according to one of the preceding claims, characterised by a first and a second terminal electronics module (60, 70; 60a, 70a), wherein the first terminal electronics module (60; 60a) is assigned to the first energy source (16; 16a) and the second terminal electronics module (70; 70a) is assigned to the second energy source (18; 18a) and wherein the second terminal electronics module (70; 70a) has a higher current load capacity than the first terminal electronics module (60; 60a).
9. Domestic appliance, in particular hob, with at least one domestic appliance apparatus (12; 12a) according to one of the preceding claims.
10. Method for operating a domestic appliance apparatus (12; 12a), in particular a hob apparatus, having at least two consumers (20, 30; 20a, 30a, 82a) and at least one switching unit (14; 14a), which has at least one first multiple switching component (40; 40a, 90a), which has at least two synchronous switching elements, wherein by means of the first multiple switching component (40; 40a, 90a) in at least one operating mode at least one first of the at least two consumers (20; 20a, 82a) is connected to a first or in at least one further operating mode to a second energy source (16, 18; 16a, 18a), wherein the switching unit (14; 14a) has at least one second multiple switching component (50; 50a, 90a), which has at least two synchronous switching elements and at least two parallel switching paths (52, 54; 52a, 54a, 92a, 94a), wherein by means of the second multiple switching component (50; 50a, 90a) at least one second of the at least two consumers (20, 30; 20a, 30a, 82a) is connected to the second energy source (18; 18a).

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