Abstract: A gas cooking appliance, having burner units mounted on an upper cooktop and an oven cavity arranged below the burner units, incorporates a fan for generating a flow of cooling air within the appliance, with the cooling air extending along an at least back and top wall portions of the oven cavity. The cooling air exits the appliance through a frontal gap formed between a door of the oven cavity and an upper frontal portion of the appliance. The burner units have associated combustion air inlets which are isolated from the flow of cooling air by being disposed in a chamber formed by sealing an isolation pan beneath the cooktop. The cooktop is formed with a plurality of openings for permitting a flow of combustion air to be drawn into the chamber for mixing with a regulated flow of combustion gas. With this arrangement, the gas burner units are isolated from the flow of cooling air within the appliance to enhance the operation of the burner units, particularly during low or simmer settings.

Abstract: A sealed gas burner assembly provides fast spark ignition of the primary air/gas mixture by supporting the electrode in an electrically insulative member that is disposed in a fluid-tight sealing engagement through the electrode aperture of a burner head, whereby ignition is facilitated by providing an ignition port directly adjacent an exterior terminal end portion of the electrode. The burner head has a low profile defined partly by a circumferential curved sidewall which eliminates turbulence in secondary airflow to the burner ports during high burner rates. A venturi tube providing the primary air/gas mixture to the burner and ignition is fully contained within an internal chamber of the burner head. The assembly is detachably secured to the burner opening of a range top through a twist lock engagement therewith, and is also provided with a seal to prevent spillovers from leaking between the assembly and the range top into the burner box.