The method can include injecting fuel from a liquefied fuel source into a combustion chamber having a combustion path, by circulating the fuel out from an inlet conduit into an evaporator housing, along the evaporator housing in a direction opposite the combustion path and across an evaporator element receiving fuel in the liquid state and exposing a multiplied surface of the liquid fuel to heat from the combustion path to evaporate the liquid fuel, and conveying the evaporated fuel into the combustion chamber and into the combustion path.

A nozzle structure of a burner includes: a housing having an exhaust opening penetratingly-formed at an upper surface thereof, and having therein an accommodation space communicated with the exhaust opening; a fuel supply member connected to the housing such that one end thereof communicates with one side of the accommodation space, for supply of liquid fuel to inside of the accommodation space; a fuel supply controller accommodated in the accommodation space so as to be movable up and down, and having a fuel supply micro-control member at an end thereof, the fuel supply micro-control member configured to micro-control the amount of fuel to be supplied, by being selectively inserted into or separated from the exhaust opening as it moves up and down; and a heating pipe connected to two sides of an outer surface of the housing with different heights, so as to communicate with the accommodation space.

A combustion chamber assembly unit, especially for a vaporizing burner and particularly especially for a vehicle heater, includes at least two combustion chamber elements (12, 20, 26, 32, 50, 52, 64, 102, 126) with wall areas (12, 34, 46, 54, 64, 104, 130, 140, 142). The at least two combustion chamber elements are arranged in a radially staggered pattern in relation to a longitudinal axis (L) of the combustion chamber and are fixed to one another by laser welding.

A combustion system includes a perforated flame holder, an oxidant source, and an adjustable fuel nozzle. The oxidant source outputs oxidant. The adjustable fuel nozzle outputs fuel onto the perforated flame holder. The perforated flame holder supports a combustion reaction of the fuel and oxidant within the perforated flame holder. The position of the adjustable nozzle relative to the perforated flame holder can be adjusted to achieve selected characteristics of the combustion reaction within the perforated flame holder.