HOUSEHOLD APPLIANCE SYSTEM

Abstract

A household appliance system includes a household appliance having a first induction unit configured to inductively supply energy, a household unit having a second induction unit configured to inductively receive the energy that is supplied from the first induction unit, and a safety unit configured to prevent, as a function of a safety parameter, at least in an interval a transmission of energy to the second induction unit.

Claims

1-15. (canceled)

16. A household appliance system, comprising: a household appliance including a first induction unit configured to inductively supply energy; a household unit including a second induction unit configured to inductively receive the energy that is supplied from the first induction unit; and a safety unit configured to prevent, as a function of a safety parameter, at least in an interval a transmission of energy to the second induction unit.

17. The household appliance system of claim 16, constructed in the form of a hob-type cooking system.

18. The household appliance system of claim 16, wherein the safety unit includes a safety element to change a coupling parameter of a coupling of the first induction unit and of the second induction unit so as to prevent the transmission of energy to the second induction unit.

19. The household appliance system of claim 18, wherein the coupling parameter comprises an impedance.

20. The household appliance system of claim 18, wherein the safety element is designed as a switching element.

21. The household appliance system of claim 18, wherein the safety element and the second induction unit are connected in series.

22. The household appliance system of claim 18, wherein the safety element and the second induction unit are connected parallel to one another.

23. The household appliance system of claim 16, wherein the safety unit includes a safety control unit configured to communicate with a household appliance control unit of the household appliance.

24. The household appliance system of claim 23, wherein the safety control unit is configured to prevent, as a function of the safety parameter, which comprises an incorrect communication with the household appliance control unit, at least in an interval the transmission of energy to the second induction unit.

25. The household appliance system of claim 16, wherein the household unit includes an energy consumer, said second induction unit supplying the energy consumer in one operating state at least in part with energy.

26. The household appliance system of claim 25, wherein the second induction unit is configured to transmit at least in part the energy in a wireless manner to the energy consumer.

27. The household appliance system of claim 25, wherein the second induction unit is configured to transmit at least in part the energy in a wired manner to the energy consumer.

28. The household appliance system of claim 16, wherein the safety unit is integrated at least to a large extent in the household unit.

29. The household appliance system of claim 16, wherein the household unit includes an item of cooking dishware.

30. A household unit of a household appliance system, said household unit comprising: an item of cooking dishware; and an induction unit configured to inductively receive energy supplied from an induction unit of a household appliance of the household appliance system to heat the item of cooking dishware as a function of a safety parameter to prevent, at least in an interval a transmission of energy to the induction unit of the household unit.

31. The household unit of claim 30, further comprising an energy consumer, said induction unit of the household unit supplying the energy consumer in one operating state at least in part with energy.

32. The household unit of claim 31, wherein the induction unit of the household unit is configured to transmit at least in part the energy in a wireless manner to the energy consumer.

33. The household unit of claim 31, wherein the induction unit of the household unit is configured to transmit at least in part the energy in a wired manner to the energy consumer.

34. A method of operating a household appliance system, comprising: inductively transmitting energy by a first induction unit of a household appliance of the household appliance system to a second induction unit of a household unit of the household appliance system; and preventing at least in an interval a transmission of energy to the second induction unit as a function of a safety parameter.

35. The method of claim 34, further comprising changing an impedance of a coupling of the first induction unit and of the second induction unit to prevent the transmission of energy to the second induction unit.

36. The method of claim 34, wherein the transmission of energy to the second induction unit is prevented when a communication of a safety control unit of the household appliance system with a household appliance control unit of the household appliance is incorrect.

37. The method of claim 34, further comprising supplying the energy in one operating state at least in part to an energy consumer of the household unit in a wireless manner or a wired manner.

Description

IN THE DRAWINGS

[0041] FIG. 1 shows a household appliance system having a household appliance and having a household unit in a schematic plan view,

[0042] FIG. 2 shows a section along the line II-II from FIG. 1 in a schematic sectional view,

[0043] FIG. 3 shows a detail of an electrical switching circuit in which a coupling of the household appliance and of the household unit is illustrated, in a schematic view,

[0044] FIG. 4 shows a diagram of a method for operating the household appliance system, in a schematic view,

[0045] FIG. 5 shows a detail of an electrical switching circuit of an alternative household appliance system in which a coupling of a household appliance and of an alternative household unit of the household appliance system is illustrated, in a schematic view,

[0046] FIG. 6 shows a detail of an electrical switching circuit of an alternative household appliance system in which a coupling of a household appliance and of an alternative household unit of the household appliance system is illustrated, in a schematic view and

[0047] FIG. 7 shows a detail of an electrical switching circuit of an alternative household appliance system, in which a coupling of a household appliance and of an alternative household unit of the household appliance system is illustrated, in a schematic view.

[0048] FIG. 1 illustrates by way of example a household appliance system 10a that is designed in particular as an induction household appliance system. The household appliance system 10a has in particular at least one and advantageously precisely one household appliance 12a.

[0049] For example, the household appliance system 10a could be designed as a cleaning appliance system and/or as a refrigeration appliance system. In particular, the household appliance 12a could be designed as a cleaning appliance, such as for example as a dryer and/or as a washing machine and/or as a dishwasher.

[0050] Advantageously, the household appliance system 10a is designed as a cooking appliance system and particularly advantageously as an induction cooking appliance system. The household appliance 12a could be designed for example as an oven and/or as a microwave and/or as a grill appliance and/or as a steam cooking appliance. The oven could be for example a cooker and/or or a baking oven.

[0051] In the present exemplary embodiment, the household appliance system 10a is advantageously designed as a hob-type cooking system and particularly advantageously as an induction hob-type cooking system. Advantageously, the household appliance 12a is designed as a hob and particularly advantageously as an induction hob.

[0052] The household appliance 12a has in particular at least one and advantageously precisely one appliance plate 30a. In particular, the appliance plate 30a in one operating state forms at least one part at least of one appliance housing of the household appliance 12a. The appliance plate 30a in one operating state forms in particular at least one visible side and/or visible surface which faces in particular at least one user. In one operating state, the appliance plate 30a is arranged in particular facing the user.

[0053] In the present exemplary embodiment, the appliance plate 30a is designed in particular as a placement plate. For example, the appliance plate 30a could be designed as a hob plate and/or as a work plate, in particular as a kitchen worktop. The appliance plate 30a is in particular provided for placement of the cooking dishware 32a, in particular for the purpose of heating the cooking dishware 32a.

[0054] The appliance plate 30a defines in particular at least one and advantageously precisely one cooking surface 34a. The cooking surface 34a is designed in particular as a surface of the appliance plate 30a which faces a user and below which in at least one operating state in particular at least one heating unit 36a is arranged (cf. FIG. 2). Of the multiple objects present, only one of them is provided in particular in each case with a reference character in the figures.

[0055] The cooking dishware 32a is in the present exemplary embodiment in particular part at least of one household unit 16a, in particular of the household appliance system 10a (cf. FIGS. 1 and 2). The household appliance system 10a has in particular at least one and advantageously at least the household unit 16a. For example, the household appliance system 10a could have at least two, advantageously at least three, particularly advantageously at least four, preferably at least five and particularly preferably multiple household units 16a.

[0056] At least one of the household units 16a could have in particular at least one and advantageously at least the cooking dishware 32a. For example, at least one of the household units 16a could be designed as cooking dishware 32a. At least one of the household units 16a could have, for example as an alternative or in addition thereto, in particular at least one household appliance and advantageously at least one small household appliance and/or could be designed as a household appliance and advantageously as a small household appliance. By way of example, only one of the household units 16a is described below, and in fact by way of example a household unit 16a that has the cooking dishware 32a.

[0057] The household appliance 16a is designed and/or provided and/or suitable in particular especially for the household appliance system 10a. In the present exemplary embodiment, the household unit 16a is designed in particular as at least one accessory for the household appliance 12a and/or as at least one set of accessories for the household appliance 12a.

[0058] The household unit 16a is provided in particular for placement of the appliance plate 30a, in particular on the cooking surface 34a of the appliance plate 30a, in particular for the purpose of heating the household unit 16a and/or for the purpose of an inductive transmission of energy to the household appliance 16a. In the present exemplary embodiment, the household unit 16a is provided in particular for a flexible placement on the cooking surface 34a, in particular for the purpose of heating the household unit 16a and/or for the purpose of an inductive transmission of energy to the household unit 16a. In particular, the household unit 16a is provided for a placement on at least one, in particular arbitrary placement position on the cooking surface 34a.

[0059] The household appliance 12a has in particular at least one and advantageously precisely one user interface 38a (cf. FIG. 1). The user interface 38a is provided in particular so as to input and/or select operating parameters, such as for example at least one heating power and/or at least one heating power density and/or at least one heating zone and/or at least one temperature and/or at least one cooking parameter at least of one appliance function. The user interface 38a is provided in particular so as to output, for example a value at least of one operating parameter and/or of at least one piece of information and/or at least one operating request, in particular to a user.

[0060] The household appliance 12a has in particular at least one and advantageously precisely one household appliance control unit 26a. In the operating state, the household appliance control unit 26a controls and/or regulates in particular at least one household appliance function and advantageously at least one household appliance main function. The household appliance control unit 26a is provided in particular so as, as a function of the operating parameters that are input by means of the user interface 38a to perform actions and/or to change settings. The household appliance control unit 26a in one operating state controls and/or regulates in particular an energy supply to at least one first induction unit 14a of the household appliance 12a and/or to the heating unit 36 of the first induction unit 14a.

[0061] The household appliance 12a has in particular at least one and advantageously at least the first induction unit 14a. The first induction unit 14a has in particular at least one and advantageously at least the heating unit 36a. In the present exemplary embodiment, the first induction unit 14a has in particular at least two, advantageously at least four, particularly advantageously at least eight, preferably at least twelve and particularly preferably a multiplicity of heating units 36a. The heating units 36a could be arranged for example in the form of a matrix.

[0062] The first induction unit 14a defines in particular the cooking surface 34a and in fact in particular by an arrangement of the heating units 36a of the first induction unit 14a. Only one of the heating units 36a is described below.

[0063] The heating unit 36a is arranged in an installed position in particular below the appliance plate 30a. The heating unit 36a is provided in particular so as to heat the household unit 16a that has in particular the cooking dishware 32a and is advantageously placed on the appliance plate 30a above the heating unit 36a and/or to supply inductive energy to the household unit 16a. The household unit 36a is designed in particular as an induction heating unit. In the operating state, the household unit 36a is arranged in particular below the cooking surface 34a.

[0064] In one operating state, the first induction unit 14a inductively supplies energy, in particular by means of the heating unit 36a, in particular to the household unit 16a. The first induction unit 14a supplies the energy in particular for the purpose of heating the household unit 16a that has the cooking dishware 32a and/or for the purpose of an inductive transmission of energy to the household unit 16a. In particular, the first induction unit 14a is provided so as to inductively supply energy, in particular to the household unit 16a.

[0065] In one operating state, the household appliance control unit 26a controls and/or regulates in particular the first induction unit 14a. The household appliance control unit 26a in one operating state inductively supplies in particular by means of the first induction unit 14a energy to the household unit 16a, in particular for the purpose of heating the household unit 16a that has the cooking dishware 32a and/or for the purpose of an inductive transmission of energy to the household unit 16a.

[0066] The household unit 16a is provided in particular so as to inductively receive energy that is supplied inductively and goes beyond purely inductively heating the household unit 16a that has the cooking dishware 32a.

[0067] In particular so as to inductively receive energy, the household unit 16a has in particular at least one second induction unit 18a (cf. FIGS. 2 and 3). In the present exemplary embodiment, the household unit 16a has in particular precisely the second induction unit 18a. The second induction unit 18a is provided in particular so as to inductively receive the energy that is supplied. In one operating state, the second induction unit 18a inductively receives, in particular the energy that is supplied in particular by the first induction unit 14a.

[0068] The household appliance system 10a has in particular at least one and advantageously precisely one safety unit 20a. In particular, the safety unit 20a is provided so as, as a function of at least one safety parameter to prevent at least in intervals a transmission of energy to the second induction unit 18a. In one operating state, the safety unit 20a as a function of the safety parameter prevents at least in intervals the transmission of energy to the second induction unit 18a.

[0069] The safety unit 20a has advantageously at least one safety element 22a. For example, the safety unit 20a could have in particular in addition to the safety element 22a, at least one and advantageously precisely one further safety element (not illustrated in the present exemplary embodiment). In the present exemplary embodiment, the safety unit 20a has in particular precisely the safety element 22a.

[0070] In particular, the safety unit 20a is provided so as by means of the safety element 22a to change at least one coupling parameter of a coupling of the first induction unit 14a and of the second induction unit 18a so as to prevent the transmission of energy. In one operating state, the safety unit 20a changes, in particular by means of the safety element 22a, the coupling parameter of the coupling of the first induction unit 14a and of the second induction unit 18a so as to prevent the transmission of energy. So as to change the coupling parameter of the coupling of the first induction unit 14a and of the second induction unit 18a, the safety unit 20a in one operating state changes a position of the safety element 22a.

[0071] The safety element 22a is advantageously designed as a switching element. In the present exemplary embodiment, the safety element 22a is designed in particular as a relay and by way of example as an electromagnetic relay.

[0072] In one operating state, the safety unit 20a changes in particular by changing a position of the safety element 22a a value of the coupling parameter of the coupling of the first induction unit 14a and of the second induction unit 18a. For example, the safety unit 20a in one operating state could arrange the safety element 22a in a blocking state of the safety element 22a and consequently in particular set a relatively large value of the coupling parameter of the coupling of the first induction unit 14a and of the second induction unit 18a and in particular prevent at least in intervals the inductive transmission of energy to the second induction unit 18a.

[0073] For example as an alternative or in addition thereto, the safety unit 20a in one operating state could arrange the safety element 22a in an enabling state of the safety element 22a and consequently in particular set a relatively small value of the coupling parameter of the coupling of the first induction unit 14a and of the second induction unit 18a and in particular enable at least in intervals the inductive transmission of energy to the second induction unit 18a.

[0074] In the present exemplary embodiment, the enabling state of the safety element 22a is in particular a closed state of the safety element 22a. In particular, the blocking state of the safety element 22a is an open state of the safety element 22a.

[0075] In the present exemplary embodiment, the coupling parameter is in particular an electrical and/or electronic parameter and/or an electrical and/or electronic signal. The coupling parameter comprises in particular at least one impedance. In particular, the coupling parameter comprises in particular an impedance of an electrical coupling between the first induction unit 14a and the second induction unit 18a.

[0076] The safety element 22a and the second induction unit 18a are particularly advantageously arranged in a common, in particular electrical, switching circuit 42a (cf. FIG. 3). In particular, the safety element 22a and the second induction unit 18a are electrically connected to one another. In the present exemplary embodiment, the safety element 22a and the second induction unit 18a are connected in particular electrically in series.

[0077] The safety unit 20a has in particular at least one and advantageously precisely one safety control unit 24a (cf. FIG. 2). The safety control unit 24a is in particular provided so as to communicate, in particular in a wireless manner with the household appliance control unit 26a of the household appliance 12a. In one operating state, the safety control unit 24a and the household appliance control unit 26a communicate with one another in particular in a wireless manner.

[0078] The safety control unit 24a is provided in particular so as, as a function of the safety parameter, which comprises at least one incorrect communication with the household appliance control unit 26a, to prevent at least in intervals the transmission of energy to the second induction unit 18a. In one operating state, the safety unit 20a determines, in particular by means of the safety control unit 24a of the safety unit 20a, the safety parameter from the communication of the household appliance control unit 26a. In particular, the safety unit 20a in one operating state, in particular by means of the safety control unit 24a, as a function of the safety parameter prevents at least in intervals the transmission of energy to the second induction unit 18a.

[0079] The safety parameter comprises in particular a result of a communication of the safety control unit 24a with the household appliance control unit 26a. In particular, the safety parameter comprises at least one incorrect communication with the household appliance control unit 26a, as a function of which the safety unit 20a in particular by means of the safety control unit 24a prevents at least in intervals the inductive transmission of energy.

[0080] In particular in the case in which the safety unit 20a in one operating state successfully communicates in particular by means of the safety control unit 24a with the household appliance control unit 26a, the safety unit 20a in one operating state enables at least in intervals the inductive transmission of energy to the second induction unit 18a. In particular in the case in which the safety unit 20a, in particular by means of the safety control unit 24a, in one operating state unsuccessfully communicates with the household appliance control unit 26a, the safety unit 20a in one operating state prevents at least in intervals the inductive transmission of energy to the second induction unit 18a.

[0081] In the present exemplary embodiment, the safety unit 20a is in particular at least in part and advantageously at least to a large extent integrated in the household unit 16a. In particular, the safety unit 20a is part of the household unit 16a. The household unit 16a has in particular the safety unit 20.

[0082] The household unit 16a has in particular at least one and advantageously precisely one energy consumer 28a. In one operating state, the second induction unit 18a supplies the energy consumer 28a at least in part with energy. In particular, the second induction unit 18a is provided so as at least in part to supply energy to the energy consumer 28a.

[0083] For example, the energy consumer 28a could have at least one electrical resistance and/or could be designed as an electrical resistance. The energy consumer 28a could for example be designed as a bottom wall 62a of the household unit 16a that has the cooking dishware 32a. The bottom wall 62a could delimit in particular in the downward direction at least in part and advantageously in one operating state for example at least one food receiving compartment 64a of the household unit 16a that has the cooking dishware 32a. In particular, the energy consumer 28a could consume the supplied energy so as to heat at least one item of food that could be arranged in the household unit 16a that has the cooking dishware 32a.

[0084] In one operating state, the second induction unit 18a supplies in particular the energy consumer 28a at least in part with energy which the second induction unit 18a receives in particular from the first induction unit 14a. In particular, the second induction unit 18a in one operating state supplies the energy consumer 28a with energy at least in part in a wireless manner. In the present exemplary embodiment, the second induction unit 18a in particular in one operating state supplies the energy consumer 28a at least in part inductively with energy.

[0085] In one operating state, the second induction unit 18a supplies in particular the energy consumer 28a with energy jointly with at least one further unit 44a. The household unit 16a has in particular at least one and advantageously at least the further unit 44a. The further unit 44a, with which the second induction unit 18a in one operating state supplies the energy consumer 28a jointly with energy, could have for example at least one capacitance, such as for example at least one resonance capacitance and/or said further unit could be designed as such.

[0086] In particular, the further unit 44a and the second induction unit 18a are arranged in the common switching circuit 42a. The further unit 44a and the second induction unit 18a are connected in particular electrically in series. Advantageously, the further unit 44a and the second induction unit 18a are part at least of one oscillating circuit and in one operating state transmit in particular by means of the resonant circuit the energy, in particular in a wireless manner, to the energy consumer 28a.

[0087] In one method for operating the household appliance system 10a, in particular in an energy supplying step 46a, in particular energy is inductively supplied in particular by the first induction unit 14a (cf. FIG. 4). In particular in at least one energy receiving step 48a, in particular the energy that is inductively supplied in particular by the first induction unit 14a is received by the second induction unit 18a. FIG. 4 illustrates the energy supplying step 46a and the energy receiving step 48a in particular chronologically one after the other.

[0088] Advantageously, the energy supplying step 46a and the energy receiving step 48a are performed in particular at least in intervals and particularly advantageously at least to a large extent simultaneously.

[0089] In particular in at least one communicating step 50a, communication takes place in particular in a wireless manner in particular advantageously between the safety control unit 24a and the household appliance control unit 26a. In particular in at least one evaluating step 52a, in particular the communication, in particular between the safety control unit 24a and the household appliance control unit 26a, is advantageously evaluated by the safety unit 20a.

[0090] In one operating state, in particular in at least one determining step 54a, the safety parameter is determined as a function of a result of the communication in particular between the safety control unit 24a and the household appliance control unit 26a, advantageously by the safety unit 20a. In particular in at least one decision making step 56a, a decision is made in particular by the safety unit 20a as a function of the safety parameter as to whether the inductive transmission of energy to the second induction unit 18a is to be enabled at least in intervals and/or is to be prevented at least in intervals.

[0091] In particular in at least one enabling step 58a, the transmission of energy to the second induction unit 18a is enabled at least in intervals, in particular by the safety unit 20a, in particular as a function of the safety parameter and advantageously as a function of a result of the decision.

[0092] In particular in at least one preventing step 60a, the transmission of energy to the second induction unit 18a is prevented at least in intervals, in particular by the safety unit 20a, in particular as a function of the safety parameter and advantageously as a function of a result of the decision.

[0093] FIGS. 5 to 7 illustrate three further exemplary embodiments of the invention. The descriptions below are limited essentially to the differences between the exemplary embodiments, wherein with regard to consistently identical components, features and functions reference can be made to the description of the exemplary embodiment that is illustrated in FIGS. 1 to 4. In order to differentiate between the exemplary embodiments, the letter a in the reference characters of the exemplary embodiment that is illustrated in FIGS. 1 to 4 has been replaced by the letters b to d in the reference characters of the exemplary embodiment that is illustrated in FIGS. 5 to 7. With regard to components with the same designation, in particular with regard to components having identical reference characters, reference can also be fundamentally made to the drawings and/or the description of the exemplary embodiments illustrated in FIGS. 1 to 4.

[0094] FIG. 5 illustrates by way of example a detail of an electrical switching circuit 42b of an alternative household appliance system 10b. The household appliance system 10b has in particular a household unit 16b, which has in particular a second induction unit 18b, and in particular a safety unit 20b, which has in particular a safety element 22b. The household appliance system 10b that is illustrated in FIG. 5 differs from the household appliance system 10a that is described by FIGS. 1 to 4 relative to the second induction unit 18b by way of example by an in particular electrical arrangement of the safety element 22b.

[0095] In particular, the second induction unit 18b and the safety element 22b are arranged in the common, in particular electrical, switching circuit 42b. In the present exemplary embodiment, the safety element 22b and the second induction unit 18b are connected in particular parallel to one another.

[0096] FIG. 6 illustrates by way of example a detail of an electrical switching circuit 42c of an alternative household appliance system 10c. The household appliance system 10c has in particular a household unit 16c, which has in particular a second induction unit 18c, and in particular a safety unit 20c. The household appliance system 10c that is illustrated in FIG. 6 is by way of example designed as a combination of the household appliance system 10a that is described by FIGS. 1 to 4 and of the household appliance system 10b that is described by the FIG. 5. In particular, the safety unit 20c is designed as a combination of the respective safety units 20a, 20b.

[0097] In particular, the safety unit 20c in the present exemplary embodiment has at least one and advantageously precisely one safety element 22c. In particular, the safety element 22c and the second induction unit 18c are connected in particular electrically in series.

[0098] The safety unit 20c has, in particular in addition to the safety element 22c, in particular at least one and advantageously precisely one further safety unit 40c. The further safety element 40c is designed in particular as a switching element, such as for example an, in particular magnetic, relay. In particular, the further safety element 40c and the second induction unit 18c are connected in particular electrically parallel to one another.

[0099] The combination of the safety element 22c and the further safety element 40c renders it possible to realize in particular a particularly high safety standard since for example in the event that the safety element 22c, 40c remains in an enabling state of the corresponding safety element 22c 40c, it is nonetheless still possible to guarantee inductive transmission of energy to the second induction unit 18c being prevented at least in intervals, and in fact in particular by arranging the remaining safety elements 22c, 40c in a blocking state of the corresponding safety element 22c, 40c.

[0100] FIG. 7 illustrates by way of example a detail of an electrical switching circuit 42d of an alternative household appliance system 10d. The household appliance system 10d has in particular a household unit 16d, which has in particular a second induction unit 18d, and in particular a safety unit 20d. The household appliance system 10d that is illustrated in FIG. 7 differs by way of example from a household appliance system 10c that is described by FIG. 6 by a design of the household unit 16d and in fact in particular by a design of an energy consumer 28d of the household unit 16d and in particular an electrical connection of the energy consumer 28d in the switching circuit 42d.

[0101] The household unit 16d has in particular the energy consumer 28d. The energy consumer 28d is designed in the present exemplary embodiment in particular as an electrical resistance. In particular, the energy consumer 28d is connected in the common electrical switching circuit 42d and in fact jointly with the second induction unit 18d and safety elements 22d, 40d of the safety unit 20d. The energy consumer 28d is connected in particular electrically in series to the second induction unit 18d.

[0102] In one operating state, the second induction unit 18d supplies in particular the energy consumer 28d at least in part with energy. In particular, the second induction unit 18d transmits the energy in one operating state in a wired manner to the energy consumer 28d. The second induction unit 18d is provided in particular at least in part so as to transmit the energy in a wired manner to the energy consumer 28d.

[0103] The household unit 16d is designed in the present exemplary embodiment in particular as a small electrical appliance and/or advantageously as a small household appliance and/or particularly advantageously as a small kitchen appliance.

[0104] For example as an alternative to the safety unit 20d that is illustrated in FIG. 7, the safety unit 20d could have precisely one safety element 22d, in particular in the case of a household unit 16d that is designed as a small electrical appliance and/or as a small household appliance and/or particularly advantageously as a small kitchen appliance. For example, the safety element 22d and the second induction unit 18d could be connected in particular electrically in series, and/or in particular electrically parallel to one another, such as has been described and/or illustrated for example in the household appliance system 10a of FIGS. 1 to 4 and/or in the household appliance system 10b of FIG. 5.

REFERENCE CHARACTERS

[0105] 10 Household appliance system [0106] 12 Household appliance [0107] 14 First induction unit [0108] 16 Household unit [0109] 18 Second induction unit [0110] 20 Safety unit [0111] 22 Safety element [0112] 24 Safety control unit [0113] 26 Household appliance control unit [0114] 28 Energy consumer [0115] 30 Appliance plate [0116] 32 Cooking dishware [0117] 34 Hob-type surface [0118] 36 Heating unit [0119] 38 User interface [0120] 40 Further safety element [0121] 42 Switching circuit [0122] 44 Further unit [0123] 46 Energy supplying step [0124] 48 Energy receiving step [0125] 50 Communicating step [0126] 52 Evaluating step [0127] 54 Determining step [0128] 56 Decision-making step [0129] 58 Enabling step [0130] 60 Preventing step [0131] 62 Bottom wall [0132] 64 Food receiving compartment