Valvular control circuit (10) comprising a first valve element (12) coupled with a manual drive member (20) to generate a pilot light (21), a second valve element (14) coupled with a second valve switch (15), a control and command unit (16) coupled with a DC/DC electric voltage converter (17) and able to command said second valve switch (15) by means of a command signal, wherein said valvular control circuit (10) comprises a first thermoelectric power source (22) coupled with the DC/DC electric voltage converter (17), and a second thermoelectric power source (23) coupled with at least one of either the first valve element (12) or the second valve element (14), said thermoelectric power sources (22, 23) both being fed by a pilot light (21).

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

Described herein are methods and systems for using pyrophoric liquids to ignite combustible gas.

An electromagnetic valve has a magnetic coil and a movable element coupled to a valve element. The magnetic coil, when excited, conveys the movable element in one direction to move the valve element from its initial position into its active position. A control circuit for the electromagnetic valve has a current source for optionally supplying current to the magnetic coil and a measuring device for measuring a voltage level of the magnetic coil and/or a current level through the magnetic coil. A monitoring unit which is connected to the measuring device establishes a switching state of the electromagnetic valve corresponding to the position of its valve element based on the intended current supply state of the current source and the current and/or voltage characteristic measured by the measuring device and, if appropriate, determines a fault state of the current supply and/or the electromagnetic valve.

Gas safety valve that includes a body having an inlet conduit and an outlet conduit. The body includes a housing in which a magnetic group is at least partially disposed. The magnetic group configured to regulate the opening or closing of a gas passage between the inlet conduit to the outlet conduit. The magnetic group includes an electromagnet, a support of the electromagnet and a bushing coupled to the support. The safety valve includes fixing means for fixing the bushing and the magnetic group to the body. The fixing means includes a fixing element having a cylindrical central part the free end of which is adapted to the geometry of the body retaining the fixing element against the body, and a flange extending radially towards the inside and retaining the bushing against the support.

The present invention relates to a method for detecting a blockage in an exhaust flue of a gas boiler, comprising: (A) a step for conducting an ignition process according to a user set temperature requested from the outside and performing temperature control to reach the user set temperature; (B) a step for determining whether the current fan RPM of a driven blower exceeds a reference fan RPM; (C) a step for calculating a difference between temperature values of supplied heating water and collected heating water that are detected by temperature sensors when heating water is supplied and determining whether the calculated value is less than a preset reference temperature value when it is determined that the current fan RPM exceeds the reference fan RPM; (D) a step for determining whether the elapsed time elapses a preset setting time based on the determination time point of the step (C) when it is determined that the calculated value is less than the reference temperature value; and (E) a step for displaying, on the outside, a notification that the blockage in the exhaust flue has been identified when it is determined that the elapsed time has elapsed the setting time based on the determination time point of the step (C).

The present invention relates to a method for detecting a blockage in an exhaust flue of a gas boiler, comprising: (A) a step for conducting an ignition process according to a user set temperature requested from the outside and performing temperature control to reach the user set temperature; (B) a step for determining whether the current fan RPM of a driven blower exceeds a reference fan RPM; (C) a step for calculating a difference between temperature values of supplied heating water and collected heating water that are detected by temperature sensors when heating water is supplied and determining whether the calculated value is less than a preset reference temperature value when it is determined that the current fan RPM exceeds the reference fan RPM; (D) a step for determining whether the elapsed time elapses a preset setting time based on the determination time point of the step (C) when it is determined that the calculated value is less than the reference temperature value; and (E) a step for displaying, on the outside, a notification that the blockage in the exhaust flue has been identified when it is determined that the elapsed time has elapsed the setting time based on the determination time point of the step (C).

A gas burner assembly for a cooktop appliance is provided. The gas burner has a gas stability chamber for providing a re-ignition source to primary burner ports positioned around the burner without the noises associated with spark controlled cycled burners. The stability chamber may entrain air from above the cooktop appliance for increased stability.

A liquid fuel air heater comprises a housing defining a motor housing portion and a grip portion extending from the motor housing portion. An electric motor is positioned in the motor housing portion. A combustion chamber is at least partially positioned within the motor housing portion. A fan is driven by the motor when activated for generating an axial airflow through the combustion chamber. A battery pack containing a plurality of battery cells connected to each other in a series or parallel arrangement is removably coupled to the grip portion of the housing for supplying power to the motor.

A liquid fuel air heater comprises a housing defining a motor housing portion and a grip portion extending from the motor housing portion. An electric motor is positioned in the motor housing portion. A combustion chamber is at least partially positioned within the motor housing portion. A fan is driven by the motor when activated for generating an axial airflow through the combustion chamber. A battery pack containing a plurality of battery cells connected to each other in a series or parallel arrangement is removably coupled to the grip portion of the housing for supplying power to the motor.