DOUBLE-CIRCUIT WALL-MOUNTED GAS BOILER Russian patent published in 2020 - IPC F24H1/00 

FIELD: fuel combustion devices.

SUBSTANCE: invention relates to design of devices for burning fuel natural gas in order to obtain heat energy in form of hot water for heating and water for hot water supply. Invention can be used in industrial and civil construction for heating and hot water supply, in independent mobile and stationary objects at generation of heat energy due to combustion of fuel natural gas. Said task is technically solved in the invention by replacing the automatic outlet valve with an expansion tank having a separating elastic membrane separating the heating water circuit from the atmosphere. Membrane is balanced on one side by the water pressure in the heating circuit, and on the other side by compressed air pressure, which is previously forced by the compressor. At increase of water pressure in heating circuit due to temperature increase membrane deflects, compressing air from its opposite side, and water release with sharp decrease of its pressure does not occur and boiler in emergency mode does not stop.

EFFECT: invention is aimed at solving the task of improving boiler operation reliability, preventing boiler emergency shutdown due to actuation of automatic outlet valve.

1 cl, 1 dwg