SEAT HEATER USABLE AS ANTENNA ELECTRODE
First Claim
1. A seat heater, comprisinga heating element for dissipating heat when a heating current is caused to flow across said heating element;
- a temperature sensor for providing a temperature signal;
whereinsaid seat heater comprises a common mode choke with at least three windings,said heating element being connected in series between a first and a second winding of said at least three windings so as to be operatively connectable to a power source via said common mode choke;
said temperature sensor being connected to a third winding of said at least three windings in such a way that said temperature signal may be received via said common mode choke.
1 Assignment
0 Petitions
Accused Products
Abstract
A seat heater, e.g. for a vehicle seat, comprises a heating element (10) for dissipating heat when a heating current flows across it and a temperature sensor (15) for providing a temperature signal indicative of the seat temperature. The seat heater comprises a common mode choke (16) with at least three windings. The heating element is connected in series between a first (16.1) and a second (16.2) thereof so as to be operatively connectable to a power source (12) via the common mode choke. The temperature sensor is connected to a third winding (16.3) of the at least three windings in such a way that the temperature signal may be received, e.g. by a temperature controller of the seat heater, via the third winding of the common mode choke.
-
Citations
17 Claims
-
1. A seat heater, comprising
a heating element for dissipating heat when a heating current is caused to flow across said heating element; -
a temperature sensor for providing a temperature signal; wherein said seat heater comprises a common mode choke with at least three windings, said heating element being connected in series between a first and a second winding of said at least three windings so as to be operatively connectable to a power source via said common mode choke; said temperature sensor being connected to a third winding of said at least three windings in such a way that said temperature signal may be received via said common mode choke. - View Dependent Claims (2, 3, 4, 5, 16)
-
-
6. An assembly of a capacitive seat occupancy sensor and a seat heater, said seat heater, comprising
a heating element for dissipating heat when a heating current is caused to flow across said heating element; -
a temperature sensor for providing a temperature signal; wherein said seat heater comprises a common mode choke with at least three windings; said heating element being connected in series between a first and a second winding of said at least three windings so as to be operatively connectable to a power source via said common mode choke; said temperature sensor being connected to a third winding of said at least three windings in such a way that said temperature signal may be received via said common mode choke. - View Dependent Claims (7, 8, 9, 10, 11, 12, 17)
-
-
13. Vehicle seat, comprising
at least one of a seat heater and an assembly of a capacitive seat occupancy sensor and a seat heater, said seat heater comprising a heating element for dissipating heat when a heating current is caused to flow across said heating element; -
a temperature sensor for providing a temperature signal; wherein said seat heater comprises a common mode choke with at least three windings; said heating element being connected in series between a first and a second winding of said at least three windings so as to be operatively connectable to a power source via said common mode choke; said temperature sensor being connected to a third winding of said at least three windings in such a way that said temperature signal may be received via said common mode choke. - View Dependent Claims (14)
-
-
15. A capacitive sensing network configured to apply an oscillating voltage to an antenna electrode and to derive a capacitive load of said antenna electrode from a current flowing into said antenna electrode in response to said application of said oscillating voltage, said capacitive sensing network comprising an interface for connecting said capacitive sensing network to a seat heater including a heating element for dissipating heat when a heating current is caused to flow across said heating element and a temperature sensor for providing a temperature signal, said interface being configured for operating said heating element as said antenna electrode, said capacitive sensing network being characterized in that said interface comprises a common mode choke including a first winding for connecting a first node of said heating element to a first terminal of a power supply, a second winding for connecting a second node of said heating element to a second terminal of said power supply and a third winding for connecting said temperature sensor to a temperature controller.
Specification