HOT-WATER BOILER Russian patent published in 2006 - IPC F24H1/00 

FIELD: heating of water, applicable in heat supply systems.

SUBSTANCE: the hot-water boiler has a base, furnace with a gas burner, radiation and convectional heating surfaces, gas conduit with a gas-exhaust branch, in which a draught control damper is installed. The damper is made in the form of a heated section having a body with a rotary tubular frame installed in it, the frame consists of vertical and horizontal tubes, pipe connection for delivery of heated circulating water and a pipe connection for discharge of heated circulating water to the boiler tubular system, installed at the frame inlet and outlet respectively, coupled to the body for turning in the bearing assemblies and provided with sealing components. The total area of the slots between the frame tubes and the body corresponds to the minimum flow section of the closed damper.

EFFECT: enhanced efficiency, durability, reliability, and simplified servicing of the boiler.

3 cl, 3 dwg