| 摘要 |
PROBLEM TO BE SOLVED: To keep working efficiency unchanged in a grain drying apparatus even when operation is facilitated following reduction of operation switches. SOLUTION: A circulation grain drying apparatus is provided in which there is repeated a process: grains in a storage tank section are dried while being exposed to hot air from a burner 5 when it flows down along a drying chamber, and are again returned to the storage tank. In the apparatus, there are provided a delivery motor for driving a delivery valve for delivering grains from the storage tank to the drying chamber and a circulation system motor 20 for returning the foregoing delivered grains to the storage tank. There are further provided on an operation control board at least an operation switch 41 for actuating both of the delivery motor and the circulation system motor 20 with on operation, a combustion switch 42 for actuating the burner, and an interruption switch 43 for interrupting each section operated. The amount of delivery by the delivery motor is alterable on the basis of a result of detection means for detecting conditions of circulated fluidization of the grains and combination of the respective switches.
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