A combustion air inflow path, for a vehicle heater, includes a bottom area (24) and an outer circumferential wall (26) adjoining the bottom area (24) and extending essentially in the direction of a central longitudinal axis (L) of the inflow element (22). An inner circumferential wall (32) is arranged at a radially spaced location from the outer circumferential wall (26) and defines a space area (52) with same. An inflow opening arrangement (38) is provided for the inflow of air into the inflow element (22). The inflow opening arrangement (38) is provided in the bottom area (24) and is designed to generate a turbulent flow.

A combustion air inflow path, for a vehicle heater, includes a bottom area (24) and an outer circumferential wall (26) adjoining the bottom area (24) and extending essentially in the direction of a central longitudinal axis (L) of the inflow element (22). An inner circumferential wall (32) is arranged at a radially spaced location from the outer circumferential wall (26) and defines a space area (52) with same. An inflow opening arrangement (38) is provided for the inflow of air into the inflow element (22). The inflow opening arrangement (38) is provided in the bottom area (24) and is designed to generate a turbulent flow.

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 positioned above a top surface of the cooktop to define a gap therebetween and having a plurality of gas outlets. The gas burner unit further includes a venturi in fluid communication with the gas outlets and an orifice holder having a plurality of protrusions defining a plurality of upwardly directed primary air inlets therethrough. The plurality of upwardly directed primary air inlets are in fluid communication with the gap on respective first ends thereof and with the venturi on respective second ends thereof opposite the first ends.

The present disclosure provides a firewood stove with adjustable firepower, wherein an air inlet barrel is provided outside a combustion barrel, an inner bottom wall of the air inlet barrel is provided with a protrusion, an outer bottom wall of the combustion barrel is provided with an accommodating groove, and the protrusion is provided through the accommodating groove. The top end of the outer wall of the combustion barrel is provided with a baffle plate, and the baffle plate abuts against the inner wall of the air inlet barrel. The bottom wall of the combustion barrel is provided with a first ventilation hole, and the air inlet barrel is provided with an air inlet hole. Through the above technical solution, the problem that the firepower of the existing firewood stove cannot be adjusted due to the size of the air inlet barrel cannot be adjusted is solved.

The present disclosure provides a firewood stove with adjustable firepower, wherein an air inlet barrel is provided outside a combustion barrel, an inner bottom wall of the air inlet barrel is provided with a protrusion, an outer bottom wall of the combustion barrel is provided with an accommodating groove, and the protrusion is provided through the accommodating groove. The top end of the outer wall of the combustion barrel is provided with a baffle plate, and the baffle plate abuts against the inner wall of the air inlet barrel. The bottom wall of the combustion barrel is provided with a first ventilation hole, and the air inlet barrel is provided with an air inlet hole. Through the above technical solution, the problem that the firepower of the existing firewood stove cannot be adjusted due to the size of the air inlet barrel cannot be adjusted is solved.

A combustor includes a combustion chamber having a grate provided therein and a combustion space formed above the grate; a fuel supply part downwardly connected to a center part of the grate so as to supply fuel to an upper part of the grate; an air supply part connected to a side part of the combustion chamber so as to be slanted on a horizontal plane, thereby supplying combustion air; a guide member disposed to protrude toward the inside of the combustion space from an inlet through which the combustion air flows into the combustion space, and opened downwardly so as to guide the combustion air; and protruding guide lines having a screw line shape and extending to be slanted downwardly on at least one of the respective surfaces, which face each other, of the guide member and the inner wall of the combustion chamber.

A gas-burning appliance includes a combustor and a flow guide device engaged with the combustor. The combustor has a gas outlet. The flow guide device includes a separator and two stop plates. The separator has an opening. Each of the stop plates is located at the opening, and a top edge thereof is higher than a top surface of the separator. The combustor is located below the separator with the gas outlet corresponding to a space between the stop plates. The flow guide device has at least one first air inlet, which is located below the separator, and communicates with the space between the stop plates. A gas fireplace includes a firebox, a translucent shield, and the gas-burning appliance. A separator divides the firebox into an air chamber, which receives the combustor, and a combustion chamber. Whereby, the visibility of flame and the combustion efficiency could be improved.

Nozzles for delivering air into a combustion system of a boiler utilizing an interchangeable divided nozzle barrel along with a variable vane. The vane can be rotated to different divisions in the nozzle to change the size of the outlet flow area and subsequently the flow velocity of the air into the combustion system to optimize performance and adjust for changes in load and fuel.