DOMESTIC HOT-WATER BOILER Russian patent published in 1994 - IPC

FIELD: hot-water boilers. SUBSTANCE: natural draught domestic hot-water boiler has combustion chamber mounted in bottle with inlet and outlet branch pipes, gas burner, gas flue with gate valve, casing and cover with heat insulation. Combustion chamber and tube bank are arranged in shell of varying section smoothly reducing in way of combustion products. Tube bank is arranged at angle to horizontal plane to ensure proper circulation of water without accumulation of steam-and-air mixture on walls of tubes in boiling. Bottom of combustion chamber having holes over periphery for water supplied from below is connected with bottle through bottom bead. Combustion chamber is connected with shell by means of inlet branch pipe having inlet holes for passage of water. EFFECT: enhanced efficiency. 3 cl, 4 dwg