A burner assembly for a cooktop includes a housing defining a first group of radially-spaced fuel outlets extending from an interior to an exterior of the housing, a first aperture extending through the housing and spaced outward of the first group of outlets, and a second group of radially-spaced fuel outlets extending from the interior to the exterior and spaced outward of the first aperture. A first switch assembly is mounted within the housing and includes a first pin extending upwardly through the first aperture to an end positioned above the housing. The end of the first pin is moveable in a first direction inward and outward with respect to the housing to control a direction of a first portion of a flow of fuel to the second group of outlets. A second portion of the flow of fuel is continuously directed to the first group of outlets.

The present invention discloses a cooker burner. The cooker burner comprises a base (1), a first ejector passage (3), a plurality of primary air passages (4), a cap (5) and a transfer passage (6), the base (1) has a chamber (11) and at least one first ejector (12); the first ejector passage (3) has a central chamber (311) and a peripheral chamber (312), the peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. With the design of the first ejector passage, the gas in the central chamber is more directly mix with the primary air in the peripheral chamber, improving the mixing uniformity and air intake rate around the periphery of the central chamber. Therefore, yellow flame and backfire can be avoided.

The present invention discloses a cooker burner. The cooker burner comprises a base (1), a first ejector passage (3), a plurality of primary air passages (4), a cap (5) and a transfer passage (6), the base (1) has a chamber (11) and at least one first ejector (12); the first ejector passage (3) has a central chamber (311) and a peripheral chamber (312), the peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. With the design of the first ejector passage, the gas in the central chamber is more directly mix with the primary air in the peripheral chamber, improving the mixing uniformity and air intake rate around the periphery of the central chamber. Therefore, yellow flame and backfire can be avoided.

A combustion device includes a first cover, a second cover, an infrared generating mesh, and a gas burner assembly, wherein the first cover has a plurality of through holes. A first half portion of the second cover has at least one hollow portion. A second half portion of the second cover is closed. The infrared generating mesh is disposed between the first cover and the second cover. A flame outlet of the gas burner assembly is located within a projection area of the second half portion. In this way, the intensity of the infrared rays generated by the combustion device could be increased and could be uniform.

A combustion device includes a first cover, a second cover, an infrared generating mesh, and a gas burner assembly, wherein the first cover has a plurality of through holes. A first half portion of the second cover has at least one hollow portion. A second half portion of the second cover is closed. The infrared generating mesh is disposed between the first cover and the second cover. A flame outlet of the gas burner assembly is located within a projection area of the second half portion. In this way, the intensity of the infrared rays generated by the combustion device could be increased and could be uniform.

A burner including a first burner element having a first annular oxidant nozzle surrounding a first inner fuel nozzle; a second burner element having a second annular oxidant nozzle surrounding a second inner fuel nozzle, the second burner element being positioned adjacent to and spaced apart from the first burner element; a staging nozzle configured to flow secondary oxidant and being positioned adjacent to and spaced apart from the second burner element and separated from the first burner element by the second burner element; wherein the first inner nozzle and the second inner nozzle each have a major axis defined by a length L and a minor axis defined by a height h.sub.f; wherein 5<=L/h.sub.f<=15; wherein the staging nozzle has a major axis; and wherein the major axes of the first and second inner nozzles and the staging nozzle are substantially parallel with each other.

A burner including a first burner element having a first annular oxidant nozzle surrounding a first inner fuel nozzle; a second burner element having a second annular oxidant nozzle surrounding a second inner fuel nozzle, the second burner element being positioned adjacent to and spaced apart from the first burner element; a staging nozzle configured to flow secondary oxidant and being positioned adjacent to and spaced apart from the second burner element and separated from the first burner element by the second burner element; wherein the first inner nozzle and the second inner nozzle each have a major axis defined by a length L and a minor axis defined by a height h.sub.f; wherein 5<=L/h.sub.f<=15; wherein the staging nozzle has a major axis; and wherein the major axes of the first and second inner nozzles and the staging nozzle are substantially parallel with each other.

The invention relates to a burner as well as to a waste gas treatment device for generating a flame for the combustion of process gas, especially of contaminants, in a combustion chamber, in each case having feed lines for a fuel gas and for an oxidizing agent so that they flow into a pre-mixing chamber, and having an ignition device for igniting the gas mixture contained in the pre-mixing chamber. According to the invention, a sensor for detecting and/or monitoring the flame is provided on the burner, especially at one end of the burner situated opposite from the pre-mixing chamber.

The invention relates to a burner as well as to a waste gas treatment device for generating a flame for the combustion of process gas, especially of contaminants, in a combustion chamber, in each case having feed lines for a fuel gas and for an oxidizing agent so that they flow into a pre-mixing chamber, and having an ignition device for igniting the gas mixture contained in the pre-mixing chamber. According to the invention, a sensor for detecting and/or monitoring the flame is provided on the burner, especially at one end of the burner situated opposite from the pre-mixing chamber.

A burner assembly for a gas grill has a venturi tube for conveying gas to a burner. A burner tube has front and back manifolds, with the venturi tube connected to the front and back manifolds. A flow restrictor is placed at a connection interface between the burner tube and front manifold.