| 摘要 |
A burner ( 1 ), fed with a mixture of fuel and air, comprising a body ( 2 ) consisting of two half-shells having a plane of symmetry, inside said body a Venturi tube ( 3 ) being defined, provided with and inlet ( 4 ) into which said mixture of fuel and air is introduced, said Venturi tube ( 3 ) communicating upwardly with a distributing chamber ( 5 ) of said mixture of fuel and air, said distributing chamber ( 5 ) communicating upwardly with a burner head ( 8 ), closed upwardly by a diffuser ( 9 ), on which openings are made for the outflow and the subsequent combustion of said mixture of fuel and air, said distributing chamber ( 5 ) exhibits a first portion ( 6 ) and a second portion ( 7 ), said first portion ( 6 ), communicating with said Venturi tube, comprising at least a first stretch ( 6 a; 6 c; 6 e) having a cross section of substantially constant width and at least a second stretch ( 6 b; 6 d) having cross section that increases progressively along a direction parallel to said plane of symmetry towards an end of said distributing chamber ( 5 ) faraway with respect to said Venturi tube ( 3 ), said second portion ( 7 ) having a section that increases progressively towards said burner head ( 8 ). |
