US 11,988,378 B2
Burner and assembly of compact burners
Pascal Laroche, Saint-Zacharie (FR); and Fouad Said, Marseilles (FR)
Assigned to FIVES PILLARD, Marseilles (FR)
Appl. No. 16/760,275
Filed by FIVES PILLARD, Marseilles (FR)
PCT Filed Nov. 29, 2018, PCT No. PCT/FR2018/053051
§ 371(c)(1), (2) Date Apr. 29, 2020,
PCT Pub. No. WO2019/122566, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 1762740 (FR), filed on Dec. 21, 2017.
Prior Publication US 2020/0309364 A1, Oct. 1, 2020
Int. Cl. F23D 14/02 (2006.01); F23D 14/64 (2006.01); F23D 14/70 (2006.01); F23D 14/84 (2006.01); F23D 23/00 (2006.01)
CPC F23D 14/02 (2013.01) [F23D 14/64 (2013.01); F23D 14/70 (2013.01); F23D 14/84 (2013.01); F23D 23/00 (2013.01); F23D 2203/007 (2013.01); F23D 2205/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Premix burner, comprising:
an air inlet tube of length L; and
a single specific gas injection system;
wherein said gas injection system comprises:
an upstream gas injector,
a mixer,
a downstream gas injector situated at a distance L3 from an upstream end of the air inlet tube, and
a diffuser;
wherein the gas injection system constitutes a one-piece mechanical assembly that ensures a self-stable elementary flame;
wherein the upstream gas injector comprises a single mechanical component configured to ensure both gas injection and mixing; and
wherein the diffuser comprises a stabilizing element of diameter D5 and a concentrator of diameter D8 and length L7, the stabilizing element is pierced by holes distributed in two concentric circles of diameters D6 and D7, D7<D8<D6, and the length L7 is between 0 and D5.