Combustion membrane for a gas burner

A combustion membrane for a gas burner, said combustion membrane forming a curved or planar multilayer panel with an inner side to which a combustible gas is conveyed and an outer side on which combustion of the combustible gas occurs upon crossing the multilayer panel, said multilayer panel comprising:

• a gas-permeable diffuser layer made of a porous or fibrous solid material other than metal sheet, said diffuser layer forming a combustion surface facing the outer side, on which combustion surface the flame develops in a combustion area;
• a support layer formed by a metal sheet, arranged on the inner side with respect to the diffuser layer, opposite to the combustion surface, and connected to the diffuser layer, said metal sheet having a perforation forming a pattern of passage openings at the combustion area, and parts of said metal sheet being in direct contact with the diffuser layer at the combustion area;
• a local deviating layer, bordering the support layer, wherein at the combustion area a plurality of diverter flaps, folded transversely out of the support layer and delimited by cutting or tearing edges of said metal sheet of the support layer, form guide surfaces oblique to a direction orthogonal to an extension plane of the multilayer panel;
• wherein the diverter flaps have a shape of a bottomless pocket, projecting from the metal sheet of the support layer and having a main guide wall and two opposite lateral guide walls, bent with respect to the main guide wall and with respect to the metal sheet plane of the support layer;
• wherein the diverter flaps comprise a first set of flaps and a second set of flaps, wherein all the diverter flaps of the first set of flaps determine a first partial flow direction of the combustible gas and all the diverter flaps of the second set of flaps determine a second partial flow direction of the combustible gas, different from the first partial flow direction;
• wherein both the first set of flaps and the second set of flaps extend in said local deviating layer on a same one of the inner side or the outer side with respect to the support layer;
• wherein the passage openings are formed in a plane of the metal sheet and spaced apart from the first set of flaps and the second set of flaps, and the passage openings are alternated with one or more flaps of said first set of flaps and one or more flaps of said second set of flaps;
• and
• wherein the first partial flow direction and the second partial flow direction of the combustible gas are substantially opposite and face each other.