DRYING CHAMBER Russian patent published in 2001 - IPC

FIELD: timber drying equipment. SUBSTANCE: drying chamber has heat-insulated housing 1, door 3 fixed at one end of housing 1, heaters 12, air duct 17, fan 5 with engine 6, combined extract and input ventilation system valves, and car for materials to be dried. False ceiling 8 is positioned in the vicinity of drying chamber ceiling. Heaters 12 are arranged above door 3 at an angle of 0-45 deg to horizontal plane. Fan 5 of reversing type is arranged at drying chamber wall opposite to door 3. Each subsequent blade of fan 5 is turned with respect to preceding blade to 180 deg. Fan axis is extending perpendicular to drying chamber floor. Engine 6 of fan 5 is positioned in sleeve adjacent to drying chamber ceiling. Combined extract and input ventilation system valves are arranged on drying chamber end wall in the vicinity of fan 5 so that one of them is above plane of rotation of fan 5 and other is below this plane. Water trays are disposed within air duct 17 on false ceiling 8 so that they may be filled with water or water may be drained. Height of air duct is selected on the basis of following condition: = 0.15-0.25, and distance δ between stack of timber material to be dried and end walls of drying chamber is selected on the basis of the following condition: = 0.25-0.35, where h₁ is distance between false ceiling 8 and drying chamber floor. Drying chamber width is 0.7-1.2 of its height. Gaskets with total area of perforations of 10- 90% are positioned between layers of timber stacks under drying process so as to be blown in longitudinal direction. EFFECT: increased efficiency in timber drying, reduced consumption of heat and electric energy and improved quality of timber drying. 8 dwg