OUT-OF-DOOR BOILER Russian patent published in 2011 - IPC F24H1/00 

FIELD: power industry.

SUBSTANCE: out-of-door boiler consists of waterproof heat-insulated housing inside which the boiler heat exchanger with direct and return lines is installed. Boiler includes burner device and is equipped with automatic valve with constantly open nozzle (not shown in the figure), circulating pump equipped with suction and supply connection pipes and located along return line; at that, automatic valve with constantly open nozzle is installed between connections of suction and supply connection pipes on return line.

EFFECT: reducing electric power consumption for pump circulation of heat carrier.

1 dwg