US 12,405,002 B2
Combustion cell for a heating system
Alessandro Maroccolo, Verona (IT)
Assigned to FERROLI S.P.A., San Bonifacio (IT)
Filed by FERROLI S.P.A, San Bonifacio (IT)
Filed on Jun. 17, 2022, as Appl. No. 17/843,012.
Claims priority of application No. 102021000016196 (IT), filed on Jun. 21, 2021.
Prior Publication US 2022/0404013 A1, Dec. 22, 2022
Int. Cl. F24H 1/43 (2022.01); F23D 14/02 (2006.01); F24H 9/00 (2022.01)
CPC F23D 14/02 (2013.01) [F24H 1/43 (2013.01); F24H 9/0026 (2013.01); F23D 2203/1017 (2013.01); F23D 2203/102 (2013.01); F23D 2900/00003 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A combustion cell for a heating system, comprising:
a fan assembly configured to supply a premixed air-gas flow required for combustion;
a combustion chamber extending along a longitudinal axis from a first end to a second end;
a lid for closing the first end of the combustion chamber;
a burner having a convex profile and including a central region and a peripheral region, wherein the central region is perforated whilst the peripheral region is hole-free;
a distributor having a convex profile and including a peripheral region provided with apertures, the distributor being located upstream the burner to feed the premixed air-gas flow to the burner and being arranged so that the peripheral region of the distributor faces the peripheral region of the burner;
a flange configured for connecting the lid to the burner,
a heat exchanger coil arranged around the longitudinal axis to surround the combustion chamber and provided with a plurality of wraps including a first wrap proximal to the burner and a last wrap distal to the burner,
wherein the flange provides a receiving surface accommodating the first wrap of the heat exchanger coil in direct contact thereto,
wherein a minimum overall distance between the heat exchanger coil and the burner varies with respect to the angular position around the longitudinal axis, between a minimum value and a maximum value, and wherein at least one of the following conditions is met:
i) the minimum value of the minimum overall distance is less than 15 mm;
ii) the maximum value of the minimum overall distance is less than 25 mm.