COOKING FURNACE Russian patent published in 1996 - IPC

FIELD: heating furnaces for making meals and heating rooms. SUBSTANCE: furnace has housing 1 widening stepwise; fire tube 2 which is also widening stepwise is located inside housing 1. Each stage of housing is provided with heat-insulated cover 5. Housing is provided with heat-insulated casing 22. Housing 1 and casing 22 are mounted on furnace 25. To discharge smoke and create draft, hood 29 provided with exhaust pipe 30 and damper 31 is mounted above housing. To converter furnace to thermos flask, it is mounted on heat insulated support 35. When furnace is used as heating system, radiator 37 is connected to housing 1. To use furnace as heating unit for steam room, horseshoe-shaped reservoir 38 connected with housing 1 by means of pipes 29 is placed in furnace. Casing 22 of housing is mounted on bead of cylinder 40 having ceiling 41 with holes and door which is filled with stones 43. EFFECT: enhanced economical efficiency and reduction of time required for cooking. 4 cl, 10 dwg