Abstract: A laundry drying unit includes a process air circuit and a component arranged in the process air circuit. Provided above the component is a washing tank for dispensing a cleaning fluid, with a flow of cleaning fluid dispensed from the washing tank to the component being controlled by a controllable valve. The valve can be controlled on the basis of an amount of cleaning fluid in the washing tank.

Abstract: A method and apparatus for transmitting a measurement variable that is detected by a measuring unit and transmitted via a data transmission channel to a main control unit of a domestic appliance that is isolated from the measuring unit is disclosed. The measurement control unit is coupled to the main control unit via a data transmission channel through which a measurement variable detectable by the measuring unit can be transmitted to the main control unit. The data transmission channel is a line having a protective impedance.

Abstract: A circuit for operating a household appliance, wherein the circuit includes a switched-mode power supply for converting the power supply of a public power supply network into direct supply voltage. The circuit also includes a controller that is connected to the switched-mode power supply for being supplied with the direct supply voltage and for controlling processes of the household appliance. An EMC filter is provided to protect the public supply network from interference signals from the household appliance. The EMC filter includes a condenser that is connected between a phase conductor pole and a neutral conductor pole of the public power supply network; a bleeder resistor that is connected in parallel with the condenser; and a switch that can be activated by the controller to connect the condenser and the bleeder resistor to the neutral conductor pole.

Abstract: A circuit for operating a household appliance, having a switching power supply for transforming a grid voltage of a supply grid to a direct current supply voltage, a controller for controlling processes of the household appliance that can be coupled to the switching power supply and supplied by the DC supply voltage, and a button by means of which the switching power supply can be coupled to the supply grid by closing an electrical switch. The switch has two mechanically stable states and can be transitioned from one mechanically stable state to the other by actuating the button and/or by an at least indirect energy input from the controller.

Abstract: A domestic appliance for treating laundered articles including a container for receiving laundered articles, which can be introduced into the container via a loading opening that can be closed by a door, and a door contact switch that is actuated as a function of a door position in order to interrupt a treatment process of the laundered articles, wherein the door contact switch is arranged on a substrate, which supports electronic control devices of the domestic appliance.

Abstract: A laundry drying unit includes a process air circuit and a component arranged in the process air circuit. Provided above the component is a washing tank for dispensing a cleaning fluid, with a flow of cleaning fluid dispensed from the washing tank to the component being controlled by a controllable valve. The valve can be controlled on the basis of an amount of cleaning fluid in the washing tank.

Abstract: A method and apparatus for transmitting a measurement variable that is detected by a measuring unit and transmitted via a data transmission channel to a main control unit of a domestic appliance that is isolated from the measuring unit is disclosed. The measurement control unit is coupled to the main control unit via a data transmission channel through which a measurement variable detectable by the measuring unit can be transmitted to the main control unit. The data transmission channel is a line having a protective impedance.

Abstract: An electric switching circuit with a first current path for operating an electric motor and with a second current path for operating a first heater. The electric motor drives a fan during which an air flow created by the fan is heated by the first heater. A switch for opening or closing the second current path in response to an actual operating state of the electric motor is, in the second current path, connected in series to the first heater. The switch is designed as a bimetallic switch and a second heater is assigned thereto that is arranged and designed for detecting the actual operating state of the electric motor and for controlling the bimetallic switch by changing its ambient temperature in response to the detected operating state.

Abstract: A circuit for operating a household appliance, having a switching power supply for transforming a grid voltage of a supply grid to a direct current supply voltage, a controller for controlling processes of the household appliance that can be coupled to the switching power supply and supplied by the DC supply voltage, and a button by means of which the switching power supply can be coupled to the supply grid by closing an electrical switch. The switch has two mechanically stable states and can be transitioned from one mechanically stable state to the other by actuating the button and/or by an at least indirect energy input from the controller.

Abstract: A circuit for operating a household appliance, wherein the circuit includes a switched-mode power supply for converting the power supply of a public power supply network into direct supply voltage. The circuit also includes a controller that is connected to the switched-mode power supply for being supplied with the direct supply voltage and for controlling processes of the household appliance. An EMC filter is provided to protect the public supply network from interference signals from the household appliance. The EMC filter includes a condenser that is connected between a phase conductor pole and a neutral conductor pole of the public power supply network; a bleeder resistor that is connected in parallel with the condenser; and a switch that can be activated by the controller to connect the condenser and the bleeder resistor to the neutral conductor pole.

Abstract: A method for secure control of one of actuators, sensors, and loads in an electrical appliance, with at least two switch bodies operated in accordance with an AND logic gate for effective switching of the one of actuators, sensors, and loads by control signals acting on the at least two switch bodies. A continuous signal and a pulse signal are issued as control signals to a number of bistable control bodies corresponding to a number of the switch bodies, which are put into a switched-on state only by issuing the continuous signal and the pulse signal which occurs during issuing of a relevant continuous signal, in which the switch bodies are effectively switched, and put into a switched-off state in which the switch bodies are switched off solely by switching off the continuous signal and kept in this switched-off state even if the relevant continuous signal is issued once more.

Abstract: A domestic appliance for treating laundered articles including a container for receiving laundered articles, which can be introduced into the container via a loading opening that can be closed by a door, and a door contact switch that is actuated as a function of a door position in order to interrupt a treatment process of the laundered articles, wherein the door contact switch is arranged on a substrate, which supports electronic control devices of the domestic appliance.

Abstract: The tumble drying device has a heat pump with a lifting magnet, with a rinsing valve of the heat pump being connectable by means of the lifting magnet, with the lifting magnet and a PTC resistor with a non-linear resistance curve being connected in series, with it being possible to heat up the PTC resistor by means of a current flow and said PTC resistor being highly resistive when a predetermined limit temperature is exceeded and with the limit temperature being adjusted such that it is reached before a permissible on-time of the lifting magnet is exceeded.

Abstract: An electric switching circuit with a first current path for operating an electric motor and with a second current path for operating a first heater. The electric motor drives a fan during which an air flow created by the fan is heated by the first heater. A switch for opening or closing the second current path in response to an actual operating state of the electric motor is, in the second current path, connected in series to the first heater. The switch is designed as a bimetallic switch and a second heater is assigned thereto that is arranged and designed for detecting the actual operating state of the electric motor and for controlling the bimetallic switch by changing its ambient temperature in response to the detected operating state.