Heating apparatus
A heating apparatus, in particular a hob heating apparatus, with at least one heating connection for at least one heating element and at least one frequency unit. In order to provide a heating apparatus of the generic type with relatively high operational reliability, it is proposed that the heating apparatus comprises a protective unit, which is provided for determining the existence of a conducting path between the frequency unit and the at least one heating connection.
1. A heating apparatus configured for a cooktop, the heating apparatus comprising:
at least one heating connection for at least one heating element,
at least one frequency unit,
a switching arrangement including at least one switching element coupling the at least one frequency unit to the at least one heating connection, and
a protective unit coupled to the at least one heating connection, the protective unit configured to determine whether a conducting path exists between the frequency unit and the at least one heating connection; and
a control unit configured to receive connection information from the protective unit and determine an erroneous existence of the conducting path.
2. The heating apparatus of claim 1 , wherein the heating apparatus is constructed as a cooktop heating apparatus.
3. The heating apparatus of claim 1 , wherein the protective unit is configured to determine whether the conducting path exists based on a potential profile.
4. The heating apparatus of claim 3 , wherein the protective unit is configured to analyze the potential profile at the at least one heating connection.
5. The heating apparatus of claim 3 , wherein the protective unit is configured to determine whether the conducting path exists based on a frequency spectrum of the potential profile.
6. The heating apparatus of claim 3 , wherein the protective unit comprises at least one high-pass filter configured to discriminate between potential profiles.
7. The heating apparatus of claim 1 , wherein the protective unit comprises a current sensor configured to determine whether the conducting path exists.
8. The heating apparatus of claim 1 , wherein the control unit is configured to initiate at least one safety measure in response to determining the erroneous existence of the conducting path.
9. The heating apparatus of claim 1 , wherein a total number of heating elements is greater than a total number of frequency units.
10. A cooktop, comprising:
a heating apparatus including:
at least one heating connection for at least one heating element,
at least one frequency unit,
a switching arrangement including at least one switching element coupling the at least one frequency unit to the at least one heating connection, and
a protective unit coupled to the at least one heating connection, the protective unit configured to determine whether a conducting path exists between the frequency unit and the at least one heating connection; and
a control unit configured to receive connection information from the protective unit and determine an erroneous existence of the conducting path.
11. The cooktop of claim 10 , wherein the cooktop is an induction cooktop.
12. The cooktop of claim 10 , wherein the heating apparatus is constructed as a cooktop heating apparatus.
13. The cooktop of claim 10 , wherein the protective unit is configured to determine whether the conducting path exists based on a potential profile.
14. The cooktop of claim 13 , wherein the protective unit is configured to analyze the potential profile at the at least one heating connection.
15. The cooktop of claim 13 , wherein the protective unit is configured to determine whether the conducting path exists based on a frequency spectrum of the potential profile.
16. The cooktop of claim 13 , wherein the protective unit comprises at least one high-pass filter configured to discriminate between potential profiles.
17. The cooktop of claim 10 , wherein the protective unit comprises a current sensor configured to determine whether the conducting path exists.
18. The cooktop of claim 10 , wherein the control unit is configured to initiate at least one safety measure in response to determining the erroneous existence of the conducting path.
19. The cooktop of claim 10 , wherein a total number of heating elements is greater than a total number of frequency units.
20. The heating apparatus of claim 8 , wherein the at least one safety measure includes the control unit switching off the at least one frequency unit.
21. The heating apparatus of claim 1 ,
wherein the control unit is configured to compare the connection information with a switch position of the switching element,
wherein the control unit is configured to initiate at least one safety measure when the connection information deviates from the switch position, and
wherein the at least one safety measure includes the control unit switching off the at least one frequency unit.
22. The heating apparatus of claim 1 , wherein the heating apparatus comprises:
a plurality of heating elements;
a plurality of heating connections for the plurality of heating elements; and
a plurality of frequency units;
wherein the switching arrangement includes a plurality of switching elements coupling the plurality of frequency units to the plurality of heating connections, and
wherein the protective unit is configured to determine whether the conducting path exists between the plurality of frequency units and the plurality of heating connections.
23. The heating apparatus of claim 22 , wherein a total number of heating elements is greater than a total number of frequency units.
24. The heating apparatus of claim 22 ,
wherein the control unit is configured to compare the connection information with switch positions of the plurality of switching elements,
wherein the control unit is configured to initiate at least one safety measure when the connection information deviates from the switch positions, and
wherein the at least one safety measure includes the control unit switching off all of the plurality of frequency units.
25. The cooktop of claim 18 , wherein the at least one safety measure includes the control unit switching off the at least one frequency unit.
26. The cooktop of claim 10 ,
wherein the control unit is configured to compare the connection information with a switch position of the switching element,
wherein the control unit is configured to initiate at least one safety measure when the connection information deviates from the switch position, and
wherein the at least one safety measure includes the control unit switching off the at least one frequency unit.
27. The heating apparatus of claim 8 , wherein the control unit determines the erroneous existence of the conducting path when the at least one heating element is energized when the control unit has set the at least one switching element for the at least one heating element to be de-energized.
28. The heating apparatus of claim 8 , wherein the connection information includes a connection status between the frequency unit and the at least one heating connection.
29. The heating apparatus of claim 28 , wherein the connection information is encoded in a digital signal.
30. The heating apparatus of claim 20 , wherein the at least one safety measure further includes the control unit outputting at least one of an error message and a maintenance request.
31. The cooktop of claim 18 , wherein the control unit determines the erroneous existence of the conducting path when the at least one heating element is energized when the control unit has set the at least one switching element for the at least one heating element to be de-energized.
32. The heating apparatus of claim 1 , wherein the protective unit is coupled to the at least one heating connection between the at least one switching element and the at least one heating element.
33. The heating apparatus of claim 1 , wherein the erroneous existence of the conducting path is an existence of the conducting path between the frequency unit and the heating connection due to the at least one switching element being defective.
34. The heating apparatus of claim 1 , wherein the erroneous existence of the conducting path is an existence of the conducting path between the frequency unit and the heating connection due to the at least one switching element being erroneously activated.