Patent ID: 8678816

Claim:
A hot air burner/generator with internal ignition comprising: a tubular burner head having a proximal end and a distal end; an injection device connected to the proximal end of the burner head and capable of producing a high velocity flow of a combustible gas mixture and injecting the high velocity flow through the burner head; the burner head including a pressure recovery chamber, the pressure recovery chamber having a flared shape delimited by two convergent walls having an increasing width and two divergent side walls having a decreasing width, the burner head further including a first ignition chamber, the first ignition chamber having a flared shape delimited by two parallel walls extending from the two convergent walls of the pressure recovery chamber and two divergent side walls of the first ignition chamber extending from the two divergent side walls of the pressure recovery chamber along the same orientations, respectively; and at least one diffusion grid attached between said pressure recovery chamber and said ignition chamber, said at least one diffusion grid having a central orifice and a concave shape with a concavity that is directed toward the first ignition chamber, an ignition chimney which extends axially inside the pressure recovery chamber, the ignition chimney having a proximal end and a distal end, the distal end of the ignition chimney extending through the central orifice of the at least one diffusion grid, a second ignition chamber and an ignition assembly, the second ignition chamber being situated between the ignition assembly and the proximal end of the ignition chimney, the ignition assembly including at least one first electrode for providing ignition to the gas flow.