HOT-WATER BOILER Russian patent published in 2020 - IPC F24H1/12 F24H9/12 F22B37/10 

FIELD: heating.

SUBSTANCE: invention relates to hot-water boilers for heating and hot water supply of communal, domestic and industrial facilities. Hot-water boiler comprises housing with side wall and two closing elements, which are rigidly connected to different ends of side wall and form together with it internal space of boiler. Burner is located in inner space of housing and is connected to one of closing elements. Heat exchanger is located in internal space of housing between side wall of housing and burner so that it sets combustion chamber surrounding burner and shields side wall of boiler housing from radiant radiation of burner. Circular channel is formed between heat exchanger and side wall of boiler housing for passage of smoke gases formed in combustion chamber. Covering elements of the housing are made so that one of them forms an input header for supply of heat carrier to be heated to the boiler, and the other one – an outlet header for removal of heated heat carrier from the boiler. Heat exchanger is formed by separate tubes flowing in one direction, each of which is connected by its one end to the inlet manifold, and by the other end – to the outlet header. Each heat exchanger tube has elongated cross-section, elongated sides of which set opposite to each other heat exchange surfaces. Heat exchanger is made in the form of sectors containing tubes, heat exchange surfaces of which are mainly parallel to each other, each tube of heat exchanger sector with elongated cross section has ends, one of which faces burner, and the other – to side wall of boiler housing. Heat exchange surfaces of adjacent tubes in the sector form a continuous feed channel for passage of flue gases from the combustion chamber to the said circumferential channel for flue gases formed between the heat exchanger and the side wall of the boiler body.

EFFECT: technical result of the invention is provision of uniform water heating in heat exchange tubes due to increase of rate of flue gases at output from through channels into circumferential channel.

1 cl, 2 dwg