Household appliance circuit arrangement
First Claim
1. An electric household appliance comprising a low-voltage capacitive power supply connected to an electrical power network and designed to generate a low-voltage, wherein said low-voltage capacitive power supply comprises:
- a user-operated control device that, when operated by a user, outputs a low-voltage enabling signal to change the electric household appliance from a standby mode to an operating mode; and
a capacitive dividing circuit comprising;
first and second input terminals connected to first and second power lines at first and second predetermined potentials, respectively;
a first output terminal adapted to provide the low-voltage enabling signal to an input of the user-operated control device;
a second output terminal connected to the second input terminal such that power supplied to the second input terminal is supplied to the second output terminal;
first and second charge-accumulating means connected between said first and second input terminals;
a third charge-accumulating means connected between said first output terminal and said second output terminal; and
at least one voltage limiter connected parallel to said second charge-accumulating means and designed to switch from a nonconducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage;
wherein said first and second charge-accumulating means are designed such that the voltage at terminals of said second charge-accumulating means is below said predetermined breakdown voltage.
1 Assignment
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Accused Products
Abstract
An electric household appliance has a low-voltage capacitive power means (10) connected to an electrical power network (3) and is designed to generate a low-voltage (S2,V2). The low-voltage capacitive power means (10) comprise a capacitive dividing circuit (28) comprising a first (30) and second input terminal (31) connected to a first and second power line (3) at a first (V1) and second (VREF) predetermined potential respectively; a first output terminal (32) adapted to generate said low-voltage enabling signal (S2); first (37) and second charge-accumulating means (38) connected between said first and second input terminal; and at least one voltage limiter (40) connected parallel to said second charge-accumulating means (38) and designed to switch from a non-conducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage (VZ). The first (37) and second charge-accumulating means (38) are designed so that the voltage (VC2) at the terminals of said second charge-accumulating means (38) is below the predetermined breakdown voltage (VZ).
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Citations
20 Claims
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1. An electric household appliance comprising a low-voltage capacitive power supply connected to an electrical power network and designed to generate a low-voltage, wherein said low-voltage capacitive power supply comprises:
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a user-operated control device that, when operated by a user, outputs a low-voltage enabling signal to change the electric household appliance from a standby mode to an operating mode; and a capacitive dividing circuit comprising; first and second input terminals connected to first and second power lines at first and second predetermined potentials, respectively; a first output terminal adapted to provide the low-voltage enabling signal to an input of the user-operated control device; a second output terminal connected to the second input terminal such that power supplied to the second input terminal is supplied to the second output terminal; first and second charge-accumulating means connected between said first and second input terminals; a third charge-accumulating means connected between said first output terminal and said second output terminal; and at least one voltage limiter connected parallel to said second charge-accumulating means and designed to switch from a nonconducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage; wherein said first and second charge-accumulating means are designed such that the voltage at terminals of said second charge-accumulating means is below said predetermined breakdown voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An electronic household appliance comprising a low-voltage capacitive power supply connected to an electrical power network and designed to generate a low-voltage, wherein said low-voltage capacitive power supply comprises:
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a user-operated control device that, when operated by a user, outputs a low-voltage enabling signal to change the electric household appliance from a standby mode to an operating mode; and a capacitive dividing circuit comprising; first and second input terminals connected to first and second power lines at first and second predetermined potentials, respectively; a first output terminal adapted to provide the low-voltage enabling signal to an input of the user-operated control device; first and second charge-accumulating means connected between said first and second input terminals; and at least one voltage limiter connected parallel to said second charge-accumulating means and designed to switch from a nonconducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage; wherein said first and second charge-accumulating means are designed such that the voltage at terminals of said second charge-accumulating means is below said predetermined breakdown voltage, wherein said low-voltage capacitive power supply is adapted to supply said low-voltage to at least one device of the appliance, wherein said device comprises a switch, a sensor, a control unit of the appliance, or a low-voltage power unit of the appliance, and wherein the electric household appliance comprises said low-voltage power unit, which is adapted to be connected to the electrical power network to receive a main supply voltage and supply a low supply voltage and further comprises said switch, which is adapted to connect/disconnect the low-voltage power unit to/from the electrical power network.
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19. An electronic household appliance comprising a low-voltage capacitive power supply connected to an electrical power network and designed to generate a low-voltage, wherein said low-voltage capacitive power supply comprises:
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a user-operated control device that, when operated by a user, outputs a low-voltage enabling signal to change the electric household appliance from a standby mode to an operating mode; and a capacitive dividing circuit comprising; first and second input terminals connected to first and second power lines at first and second predetermined potentials, respectively; a first output terminal adapted to provide the low-voltage enabling signal to an input of the user-operated control device; first and second charge-accumulating means connected between said first and second input terminals; and at least one voltage limiter connected parallel to said second charge-accumulating means and designed to switch from a nonconducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage; wherein said first and second charge-accumulating means are designed such that the voltage at terminals of said second charge-accumulating means is below said predetermined breakdown voltage, wherein said low-voltage capacitive power supply is adapted to supply said low-voltage to at least one device of the appliance, wherein said device comprises a switch, a sensor, a control unit of the appliance, or a low-voltage power unit of the appliance, and wherein the electric household appliance comprises said low-voltage power unit, said switch, and said control unit, said low voltage power unit being adapted to supply a low supply voltage to said control unit so that the switch in a closed state connects the low-voltage power unit to the electrical power network to turn on the low-voltage power unit and the control unit.
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20. An electronic household appliance comprising a low-voltage capacitive power supply connected to an electrical power network and designed to generate a low-voltage, wherein said low-voltage capacitive power supply comprises:
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a user-operated control device that, when operated by a user, outputs a low-voltage enabling signal to change the electric household appliance from a standby mode to an operating mode; and a capacitive dividing circuit comprising; first and second input terminals connected to first and second power lines at first and second predetermined potentials, respectively; a first output terminal adapted to provide the low-voltage enabling signal to an input of the user-operated control device; first and second charge-accumulating means connected between said first and second input terminals; and at least one voltage limiter connected parallel to said second charge-accumulating means and designed to switch from a nonconducting to a conducting state when subjected to a voltage above a predetermined breakdown voltage; wherein said first and second charge-accumulating means are designed such that the voltage at terminals of said second charge-accumulating means is below said predetermined breakdown voltage, wherein said low-voltage capacitive power supply is adapted to supply said low-voltage to at least one device of the appliance, wherein said device comprises a switch, a sensor, a control unit of the appliance, or a low-voltage power unit of the appliance, and wherein the electric household appliance comprises said low-voltage power unit and said control unit, said low-voltage power unit being adapted to be connected to the electrical power network to receive a main supply voltage and supply a low supply voltage to said control unit of the appliance, wherein the low-voltage power unit is designed to go from an active state, in which it supplies a low voltage to the control unit, to an idle state, in which the low-voltage power unit cuts off low-voltage supply to the control unit, but still remains partly active so it can be reactivated by a control signal and wherein said low-voltage capacitive power supply is adapted to provide a control signal for switching the low-voltage power unit from the idle state to the active state or from the active state to the idle state.
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Specification