An apparatus for adjusting and controlling the combustion in a fuel gas burner. The apparatus comprises the following mutually integrated components: a comburent gas/fuel gas mixing pipe provided with a Venturi mixer in correspondence of which a fuel gas supply duct opens; means for adjusting the flow rate of fuel gas; a fan, at least partially housed in said mixing pipe; a burner arranged downstream of said fan; a safety system based upon the detection of the flame present in said burner; and an electronic control unit of devices belonging to the apparatus. The apparatus is characterized in that it further comprises: a temperature probe arranged on the inner surface of the burner; a valve for adjusting the fuel gas flow rate in the duct; said valve belonging to said control means and being mechanically controlled by an actuator; and an electronic card, electronically connected to said probe, to said fan and to said actuator.

The following relates generally to improving chimney safety through monitoring and detection of overheat conditions or animal intrusion that may damage a chimney or result in uncontrolled fire spreading outside the chimney. To improve chimney safety, a system may use temperature levels, sound signals, and/or imagery data to determine an overheat condition in a chimney. Upon determination of an overheat condition, the system may send an alert to a mobile device of a user or take other action (e.g., shutting off gas to a firebox, alerting the fire department, etc.). Similarly, sound signals and/or imagery data may be used to determine the presence of: (i) animals within or near the chimney, and/or (ii) water in the chimney box (e.g., water on a wall of the chimney box, or dripping to the bottom of the chimney box).

An oven appliance includes a cabinet and a chamber defined within the cabinet for receipt of food items for cooking. A gas burner is positioned in the cabinet, and a first temperature sensor is positioned proximate the gas burner. A second temperature sensor is distal from the first temperature sensor and the gas burner. The second temperature sensor is positioned and configured to measure a temperature in the chamber. A controller is positioned within the cabinet. The controller is configured for measuring a first temperature with the first temperature sensor, measuring a second temperature with the second temperature sensor, calculating a difference between the first temperature and the second temperature, and determining a flame is emanating from the gas burner in response to a positive difference between the first temperature and the second temperature.

A barbecue arrangement comprising a barbecue body having a cooking volume, one or more burners positioned to provide heat to the cooking volume; a gas source adapted to supply a gas to the one or more burners, and one or more control means to control the flow of gas from the gas source to the one or more burners producing a flame when the gas is ignited; a flame detection assembly, the flame detection assembly adapted to sense the flame from the one or more burners and a control means adapted to shut off the gas flow to the one or more burners if the flame is not detected within a pre-determined period of time.

The object of the present invention is a control method for verifying the presence of the flame in the combustion chamber (41) of a premixed gas burner (1), fed by an air and gas mixture mainly and/or essentially comprising hydrogen H2. The method is based on the use of at least one temperature sensor (6), the values whereof are sent to a control device (8) which uses them to calculate the derivative T over time of the temperature T to compare it to suitable feedback thresholds (Tau1, Tau2; Tau3, Tau4) to establish the ignition occurred, the ignition failure or flame extinguishment.