JPS6428480A - Grain drier - Google Patents

Abstract

PURPOSE: To save energy by sectioning a hot air chamber vertically upon detecting progress of drying operation and passing the air effective for drying, passed through the lower half section of a drying chamber, again through the upper half section of the drying chamber. CONSTITUTION: Only when a moisture sensor 30 and a humidity sensor 31 measure set values, respectively, a switching valve 20 is operated to section a hot air chamber 5. Electrical connection with a motor is made to close the open valve 17 of each air discharge chamber 6 and to open the close valve 11 of the hot air chamber. Consequently, hot air in the hot air chamber 5 is blocked by the switching valve 20 and fed through the lower half section of a drying chamber 4 to the air discharge chamber 6. Since the hot air has passed through the lower half section of the drying chamber 4, unhulled rice at the upper half section of the drying chamber 4 is dried slightly. The unhulled rice flowing down into the drying chamber 4 is subjected to dry up action by the hot air traversing the lower half section of the drying chamber 4 from below the switching valve 20 of the hot air chamber 5. The unhulled rice is subjected to specified drying action combined with the drying action in the upper half section of the drying chamber 4.