A gas cooktop includes a cooktop body having a burner head which when activated generates a fire for heating cookware placed on the burner head, and a control system which includes a fire detection apparatus installed over the burner head and is aligned with the burner head. The control system further includes a control apparatus receiving a signal of the fire detection apparatus to control the fire of the burner head. The control apparatus determines, depending on whether the fire detection apparatus detects the fire of the burner head, whether cookware is placed on the burner head. By using such a gas cooktop including the control system, the gas cooktop automatically adjusts the fire to a minimum after a user removes a cookware, thus reducing fume in a kitchen and reducing gas consumption.

A system for controlling digital gas valves of an appliance utilizing a configurable duty cycle that includes a configurable ON time, a configurable cycle period and one or more configurable burner power level variables. In some instances, the configurable duty cycle may be configured at least in part by operation of a control knob, and in some instances, multiple burner power levels may be specified such that cycling may be performed between multiple burner power levels.

Provided are embodiments of a gas valve for an intermittent pilot ignition system. The gas valve includes features designed to address the buildup of negative pressure in a fuel line connected to the gas valve that could cause internal valve diaphragms to open, drawing fuel from the gas valve. In embodiments, the gas valve includes a system of check valves designed to seal off the gas valve when a negative pressure develops. In other embodiments, the gas valve includes a relief valve having a relief port so that air is able to enter the valve proximate to the inlet port so as to avoid building a negative pressure sufficient to open the diaphragms. In both cases, the valve remains primed with fuel for subsequent ignition. The gas valve is envisioned to be useful for a variety of pilot operated systems.

An electronically controlled burner management system for oilfield separators. The system includes an autonomous standing pilot spark ignition that includes a self-aligning clamp that holds the igniter to the burner nozzle. The self-aligning clamp enables rapid installation and removal, lowering the total cost of ownership. The autonomous spark ignition system incorporates temperature sensors to determine when the standing pilot needs to be relit, and can shut off the gas or other fuel flow to the standing pilot and the main burner when the pilot is not lit. The system increases oil and gas production from the well, reduces fugitive emissions of unburned gas, and improves oilfield worker safety. When installed or retrofitted into an existing oilfield separator, the original burner control components are left in place, allowing the user to revert to traditional operation in case of failure of any electronic component of the present system.

A system for controlling digital gas valves of an appliance utilizing a configurable duty cycle that includes a configurable ON time, a configurable cycle period and one or more configurable burner power level variables. In some instances, the configurable duty cycle may be configured at least in part by operation of a control knob, and in some instances, multiple burner power levels may be specified such that cycling may be performed between multiple burner power levels.

A barbecue grill has a body, a barbecue grid, a heating device, a heating adjustment unit, a thermal sensor, and a control device. The heating adjustment unit is connected with the heating device. The thermal sensor is mounted in the body and detects an actual temperature. The control device has a constant temperature control module electrically connected to the heating adjustment unit and the thermal sensor. The constant temperature control module controls the heating adjustment unit to adjust heat output of the heating device according to a difference value between a target temperature and the actual temperature. The heat output of the heating device is increased or decreased according to the difference value to keep the temperature constant at the position of the thermal sensor.

Methods and systems for a flame display may comprise flowing fuel from a fuel source to a burner via an electric valve fuel passage that includes an electric valve and via a mechanical valve fuel passage that includes a mechanical valve, receiving a flame boost mode request, and adjusting the electric valve to a wide open position. The flame display may further be operated in a music mode in which the electric valve is adjusted based on an audio input or in a standard mode.

Apparatus and methods for a gas furnace are disclosed. The gas furnace includes a variable combustion control which monitors the temperature of the burner and modifies one of the amount of combustion air supplied and the amount of gas fuel supplied to the mixing chamber. The described systems can dynamically accommodate differences in air quality and gas fuel supply to provide an optimum BTU output irrespective of differences in geographic location of usage. The gas furnace can include a dynamic response unit which predicts an optimum rate of heating to maintain a target room temperature, thereby preventing unnecessary shut down and costly re-ignition sequences, and maintaining the gas furnace at an optimum BTU output level.

The present invention discloses a regulating mechanism regulating the flows from a plurality of gas outlets in a fuel gas valve, comprising an actuator, a push rod, a presser plate assembly, regulating rods and a valve body. Wherein the valve body has a plurality of gas outlets, a regulating rod is provided in each regulating port which exists between the gas inlet and each gas outlet, a resetting device is provided between each regulating rod and the valve body, and the actuator drives the push rod which is around by the regulating ports to move along the axis. The push rod causes the presser plate assembly to move up and down to press or relax the regulating rods and simultaneously change the degree of opening between the head portion of each regulating rod and the corresponding regulating port so that the flow from each gas outlet changes synchronously.

A method of operating a multi-ring gas burner includes sending a spark to a first ring of the multi-ring burner. After sending the spark to the first ring, the method determines a flame status of the first ring and adjusts a position of an electronic gas valve connected to a second ring of the multi-ring gas burner based on the determined flame status of the first ring.