CONVECTIVE FURNACE Russian patent published in 2002 - IPC

FIELD: heating units for rooms and cooking. SUBSTANCE: convective furnace includes fire box, front wall with loading door, casing located on three sides of fire box, ash dump with fire grate and wind box door, air ducts, branch pipe with register for evacuation of waste gases and supports. Furnace is provided with firewood thermal decomposition chamber and instrument for monitoring optimal temperature of firewood thermal decomposition, combustible mixture forming and autoigniting chamber and instrument for monitoring formation of combustible mixture and its combustion temperature, corrugated heat exchanger with developed heating surface directed towards fire box and ejector passage, air intake with developed surface, thermal duct with fins and refractory shield, thermal reflector, swivel shutters and economizer. Firewood thermal decomposition chamber and combustible mixture forming chamber are formed by dividing the fire box into upper and lower parts by means of roof. Temperature monitoring instruments are found on front wall. Corrugated heat exchanger with external casing forms convective air ducts located vertically on three sides of fire box. Air intake is formed by outer surface of ash dump and surface of swivel shutters located in lower part of heat exchanger on three sides. Thermal duct is located at the top of fire box with its fins downward; it is connected with corrugated heat exchanger and front wall over perimeter. Ejector passage is located in fire box on surface of corrugated heat exchanger and its baffle enters convective air duct. Economizer is mounted on thermal duct flange. EFFECT: enhanced efficiency; increased productivity. 5 dwg