A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.

The invention relates to an arrangement (1) including two burners (10), which has a common exhaust gas guiding device (2) and a common supply device (3) for combustion air. A backflow barrier (4) blocks a flow of a gaseous medium in a flow direction and is arranged in the exhaust gas guiding device (2) or in the supply device (3). The backflow barrier (4) has an opening (40) and a movable element (41) which is movable between two positions. The opening (40) is open in case the movable element (41) is in one of the two positions and closed in case the movable element (41) is in another of the two positions.

The invention relates to an arrangement (1) including two burners (10), which has a common exhaust gas guiding device (2) and a common supply device (3) for combustion air. A backflow barrier (4) blocks a flow of a gaseous medium in a flow direction and is arranged in the exhaust gas guiding device (2) or in the supply device (3). The backflow barrier (4) has an opening (40) and a movable element (41) which is movable between two positions. The opening (40) is open in case the movable element (41) is in one of the two positions and closed in case the movable element (41) is in another of the two positions.

A fire construction (10) comprising a firebox (12) defining a combustion chamber (14) in which fuel (not shown) can be burnt, a first air supply means (16) for delivering air into the combustion chamber (14) to support combustion of fuel therein, and a second air supply means (18) for supplying additional air to support combustion of fuel within the combustion chamber (14), the second air supply means (18) comprising a supply conduit (20) connecting the combustion chamber (14) with an air supply (22), the supply conduit (20) having a cross section (24) that increases as the supply conduit (20) opens into the combustion chamber (14).

A burner assembly for a cooktop includes a base portion having one or more vents and an eccentric stem. A cover portion is received on the base portion to define a mixing chamber disposed between the cover portion and the base portion. The cover portion includes a plurality of fuel ports opening inwardly into a centrally disposed combustion chamber. A venturi mixer is received through the eccentric stem and is configured to provide a primary-air and gas mixture to the mixing chamber as supplied from the cooktop. An aperture is disposed through an upper surface of the cooktop and is configured to pivotally receive the eccentric stem of the base portion for pivoting the burner assembly on the cooktop.

An interchangeable enclosed combustor for combustion of vapors includes: an interchangeable multi-paneled, multi-tiered combustor housing having a plurality of panels coupled together in polygonal form and further arranged in multiple tiers of polygonal forms, thereby to form a vertical, columnar, polygonal stack to flame combust combustible vapors; and a burner manifold disposed within the vertical, columnar, polygonal stack to flame combust combustible vapors to reduce toxic emissions. The burner manifold natural draft burners and nozzles are configured to the ratio of air and fuel to mix to achieve stoichiometric combustion and reduce harmful emissions at a rate >98% destruction efficiency and inlet pressure of <1 oz./in2. The burner manifold includes at least one orifice of a predetermined size through which to draw fuel into a plurality of mixing chambers where air is drawn in through multiple stages of air intake ports that are sized based upon fuel type and pressure.

The present disclosure provides a combustion furnace with adjustable firepower, including a furnace body. The furnace body is provided with a combustion chamber in which combustible materials are placed. The furnace body further includes an adjusting mechanism and an air inlet, the air inlet is provided on the side wall of the furnace body, and communicated with the combustion chamber so that external air enters the combustion chamber through the air inlet. The adjusting mechanism is configured to control the air inlet to be turned on or off. Through the above structural arrangement, users can control the air inlet to be turned on or off by controlling the adjusting mechanism, so as to adjust the firepower of the combustion furnace.

The present disclosure provides a combustion furnace with adjustable firepower, including a furnace body. The furnace body is provided with a combustion chamber in which combustible materials are placed. The furnace body further includes an adjusting mechanism and an air inlet, the air inlet is provided on the side wall of the furnace body, and communicated with the combustion chamber so that external air enters the combustion chamber through the air inlet. The adjusting mechanism is configured to control the air inlet to be turned on or off. Through the above structural arrangement, users can control the air inlet to be turned on or off by controlling the adjusting mechanism, so as to adjust the firepower of the combustion furnace.

A gas burner unit for a cooktop includes a spreader having a first side with a plurality of gas outlets and a second side opposite the first side and defining a portion of a fluid path. The spreader further defines a venturi in fluid communication with the gas outlets and extending away from the second side. The gas burner unit further includes an orifice holder having a protrusion defining an upwardly directed primary air inlet therethrough. The upwardly directed primary air inlet is in fluid communication with the fluid path associated with the spreader on a first end thereof and with the venturi on a second end thereof opposite the first end.

The combustor includes a nozzle casing, and combustion nozzles disposed at position spaced apart from each other in the nozzle casing and configured to mix fuel with compressed air and eject the mixture, Where each of the combustion nozzles includes, a nozzle shroud including an inlet through which the compressed air is drawn into the nozzle shroud, and an outlet through which the compressed air is discharged out of the nozzle shroud, an injection cylinder disposed in the nozzle shroud and configured to allow the fuel to be injected into the injection cylinder, and swirlers disposed on an outer circumferential surface of the injection cylinder, where the nozzle shroud includes a region having a constant diameter from the inlet to a predetermined distance along a longitudinal direction of the nozzle shroud.