| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain drier capable of efficiently promoting moisture equalization by keeping predetermined grain temperature while suppressing sweating of grain, in a case that the grain drier is stopped and kept in a predetermined high-temperature state by a resting process in grain dry processing by exhaust air circulation. SOLUTION: The exhaust air circulating type grain drier includes a control part (F) which carries out exhaust air circulation drying control for making exhaust air diverge to the circulation side by switching valves (22, 23) and circulating the air in a grain drying part (3) to dry the grain by an exhaust air circulation ratio according to a detected moisture value of the grain, and drying resting control for stopping the grain drying if the detected moisture value reaches a separately-set resting reference moisture value. The control part (F) gradually opens the switching valves (22, 23) until all the air is exhausted in a predetermined moisture value range until the detected moisture value in the exhaust air circulation drying control reaches the resting reference moisture value, gradually decreases the exhaust air circulation ratio at predetermined speed, and then, carries out the drying resting control. COPYRIGHT: (C)2011,JPO&INPIT |
