A cooking appliance includes a gas cooking element, an electromechanical valve fluidly coupled with the gas cooking element to regulate a flow of gas to the cooking element, a flame detector configured to detect an active state of a flame for the gas cooking element, a manually-actuated user control movable over a range of positions, and a controller coupled to the electromechanical valve, the flame detector, and the manually-actuated user control. The controller is configured to initiate a calibration process to determine an active range for the gas cooking element.

A cooking appliance and method generate an audible and/or visual indication to a user when a user control for a gas burner is in a position within which an igniter is active and a gas valve is supplying sufficient gas flow to the gas burner to support ignition and thereby assist a user in properly positioning the user control during ignition of the burner.

A device for handling combustion gas comprises: a housing, a first electronic element, a second electronic element, a connecting element, and a sealing element. The housing defines a gas chamber for the combustion gas and an ambient chamber for ambient air. The first electronic element is positioned within the gas chamber and is exposed to the combustion gas. The second electronic element is positioned within the ambient chamber and is not exposed to the combustion gas but is exposed to the ambient air. The connecting element electrically connects the first electronic element and the second electronic element. The sealing element is made at least partially from an elastomer, and is compressed between the connecting element and the housing, and seals the gas chamber against the ambient chamber even if electrically insulating material of the connecting element or the connecting element is removed.

The hydrogen gas burner has a first pipe extendable into an oven chamber, having a plurality of through-holes in a sidewall thereof, fluidly communicating an interior of the first pipe with an exterior thereof. A combination gas valve and pressure regulator is connected to an inlet of the first pipe and fluidly connects a hydrogen gas source with the first pipe, such that the hydrogen gas flows into the first pipe and exits therefrom through the through-holes. An igniter ignites and initiates combustion of the exiting hydrogen gas. A second pipe is extendable into the oven chamber, having apertures in the sidewall thereof fluidly communicating an interior of the second pipe with an exterior thereof. The second pipe fluidly connects at an inlet thereof with an air source, whereby the air flows into the second pipe from the inlet thereof and exits out of the second pipe through the apertures.

A premixing apparatus has a butterfly valve provided in an air supply passage, a zero governor and a variable throttle valve interposed in a gas supply passage. A control is performed to switch a combustion capacity between at least two stages of a large-capacity stage and a small-capacity stage through change in opening degrees of the butterfly valve and the variable throttle valve. At the small-capacity time, in case the opening degree of the variable throttle valve, when regulated so that the λ becomes a predetermined value, has been changed more to the small-opening-degree side than the predetermined small-capacity opening degree, in a state in which the opening degree of the variable throttle valve has been returned to the predetermined small-capacity opening degree, the opening degree of the butterfly valve is regulated such that the λ becomes the predetermined value, and the small-capacity opening degree of the butterfly valve is renewed to the predetermined value when the λ becomes the predetermined value.

In an embodiment, a system includes a gas turbine controller. The gas turbine controller is configured to receive a plurality of sensor signals from a fuel composition sensor, a pressure sensor, a temperature sensor, a flow sensor, or a combination thereof, included in a gas turbine engine system. The controller is further configured to execute a gas turbine model by applying the plurality of sensor signals as input to derive a plurality of estimated gas turbine engine parameters. The controller is also configured to execute a flame holding model by applying the plurality of sensor signals and the plurality of estimated gas turbine engine parameters as input to derive a steam flow to fuel flow ratio that minimizes or eliminates flame holding in a fuel nozzle of the gas turbine engine system.

The hydrogen gas burner has a first pipe extendable into an oven chamber, having a plurality of through-holes in a sidewall thereof, fluidly communicating an interior of the first pipe with an exterior thereof. A combination gas valve and pressure regulator is connected to an inlet of the first pipe and fluidly connects a hydrogen gas source with the first pipe, such that the hydrogen gas flows into the first pipe and exits therefrom through the through-holes. An igniter ignites and initiates combustion of the exiting hydrogen gas. A second pipe is extendable into the oven chamber, having apertures in the sidewall thereof fluidly communicating an interior of the second pipe with an exterior thereof. The second pipe fluidly connects at an inlet thereof with an air source, whereby the air flows into the second pipe from the inlet thereof and exits out of the second pipe through the apertures.

A cooking appliance includes a gas cooking element, an electromechanical valve fluidly coupled with the gas cooking element to regulate a flow of gas to the cooking element, a flame detector configured to detect an active state of a flame for the gas cooking element, a manually-actuated user control movable over a range of positions, and a controller coupled to the electromechanical valve, the flame detector, and the manually-actuated user control. The controller is configured to initiate a calibration process to determine an active range for the gas cooking element.

A regulation device for regulating a mixing ratio (x) of a gas mixture comprises a first conduit (1) for carrying a flow of a first gas (e.g., air) and a second conduit (2) for carrying a flow of a second gas (e.g., a fuel gas). The first and second conduits (1, 2) open out into a common conduit (3) in a mixing region (M) to form the gas mixture. A first sensor (S1) is configured to determine at least one thermal parameter of the gas mixture downstream from the mixing region. A control device (10) is configured to receive, from the first sensor, sensor signals indicative of the at least one thermal parameter of the gas mixture and to derive control signals for adjusting device (V1) acting to adjust the mixing ratio, based on the at least one thermal parameter.

The present disclosure describes a metal making burner in fluid communication with a gas inlet and comprising an oxygen inlet valve that provides control of oxygen flow to two different discharge lines, such as a main line and a shroud line. This allows distinct “modes” of operation, utilizing only the flow from the single oxygen supply as the control method. The apparatus includes a moving piston with ports therein that meter flow to both discharge lines when the ports line up with a separate set of ports in a cylinder that receives the piston. At low or no pressure from the gas inlet, flow rates follow one ratio of flows between the discharge lines. As pressure from a gas inlet changes in the burner, the piston moves and realigns the ports (opening or closing some of the ports), which results in a different ratio of flows between the discharge lines.