| 摘要 |
An improved condensation premixing boiler for sanitary water and heating systems comprises at least a finned heat exchanger the fins (4) of which are provided downwardly located and slanted notches to direct the dripping condensate away from the tube sheet (2) of the heat exchanger, the tube sheet (2) providing, together with the specifically contoured fins (4), a plurality of thermal exchange stages (5,6,7); and at least a ceramic burner provided with a premixing block (9) including at least a flange (10) and one or more calibrated nozzles (11), with a plurality of perforated plates (14,15) upstream of the ceramic plates (16,17) where the combustion occurs, and adapted to assure an even distribution of the air-gas mixer through the overall surface of the burner, as well as a support element having a sealing gasket (18) allowing the ceramic plates (16,17) to expand. <IMAGE> |
