Circuit arrangement for an electric appliance

• US 20050084118A1
• Filed: 08/27/2004
• Published: 04/21/2005
• Est. Priority Date: 08/27/2003
• Status: Abandoned Application

• Current Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Original Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Inventors: Zenker, Thomas, Ohl, Gerold, Schaupert, Kurt
• Application Number:
  US10/927,950
• Publication Number:
  US 20050084118A1
• Time in Patent Office: Days
• US Class Current: 381/110
• CPC Class Codes: H05B 1/0252 Domestic applications
• CPC Class Codes: H05B 3/74 Non-metallic plates , e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits

Abstract

A circuit arrangement for an electric appliance, having a control device and a power supply connected with an electric current supply connector for supplying functional units to be controlled of the electric appliance. A switching device for the separation of the power supply from the electric current supply connector at the primary side is provided at the electric current supply connector, which has a comparator, which can be activated by an electrical activation signal (A). It is used, for example, in electronically controlled household appliances.

Claims

1. A circuit arrangement for an electric appliance, having a control device (10) and a power supply (12) connected with an electric current supply connector (L, N) for supplying controllable units of the electric appliance, wherein a switching device (14) for a separation of the power supply (12) from the electric current supply connector (L, N) at a primary side is provided at the electric current supply connector (L, N), the circuit arrangement comprising:

the switching device (14) having a comparator activated by an electrical activation signal (A).

2. The circuit arrangement in accordance with claim 1, wherein the activation signal (A) is an output signal of a signal generation device (15).

3. The circuit arrangement in accordance with claim 2, wherein the signal generation device (15) converts at least one of an optical signal, an acoustic signal and an other signal into the electrical activation signal (A).

4. The circuit arrangement in accordance with claim 3, wherein the signal generation device (15) has one of a microphone and a loudspeaker.

5. The circuit arrangement in accordance with claim 4, wherein a comparator is connected with a power semiconductor circuit (16) so that when activated the comparator connects the control device (10) with the electrical current supply connector (L, N) for activation.

6. The circuit arrangement in accordance with claim 5, wherein the power semiconductor circuit (16) has at least one triode AC semiconductor switch.

7. The circuit arrangement in accordance with claim 6, wherein the activated power semiconductor circuit (16) connects the control device (10) with the electrical current supply connector (L, N) via the power supply (12).

8. The circuit arrangement in accordance with claim 7, wherein for maintaining an electrical current supply of the electric appliance during operation the control device (10) is connected with a holding circuit (18) activated by the control device (10).

9. The circuit arrangement in accordance with claim 8, wherein the holding circuit has at least one thyristor (18).

10. The circuit arrangement in accordance with claim 9, wherein the holding circuit has at least one of an electro-mechanical relay and a reed relay.

11. The circuit arrangement in accordance with claim 10, wherein the control device (10) is connected with a semiconductor circuit for separation from the electrical power supply connector (L, N).

12. The circuit arrangement in accordance with claim 11, wherein the control device (10) deactivates a holding circuit for separation from the electrical power supply connector (L, N) and for switching off the electric appliance.

13. The circuit arrangement in accordance with claim 2, wherein the signal generation device (15) has one of a microphone and a loudspeaker.

14. The circuit arrangement in accordance with claim 1, wherein a comparator is connected with a power semiconductor circuit (16) so that when activated the comparator connects the control device (10) with the electrical current supply connector (L, N) for activation.

15. The circuit arrangement in accordance with claim 14, wherein the power semiconductor circuit (16) has at least one triode AC semiconductor switch.

16. The circuit arrangement in accordance with claim 5, wherein the activated power semiconductor circuit (16) connects the control device (10) with the electrical current supply connector (L, N) via the power supply (12).

17. The circuit arrangement in accordance with claim 1, wherein for maintaining an electrical current supply of the electric appliance during operation the control device (10) is connected with a holding circuit (18) activated by the control device (10).

18. The circuit arrangement in accordance with claim 17, wherein the holding circuit has at least one thyristor (18).

19. The circuit arrangement in accordance with claim 8, wherein the holding circuit has at least one of an electro-mechanical relay and a reed relay.

20. The circuit arrangement in accordance with claim 1, wherein the control device (10) is connected with a semiconductor circuit for separation from the electrical power supply connector (L, N).

21. The circuit arrangement in accordance with claim 8, wherein the control device (10) deactivates a holding circuit for separation from the electrical power supply connector (L, N) and for switching off the electric appliance.