JPS6441787A - Cereal grain drying control system of cereal grain drier - Google Patents

Abstract

PURPOSE: To stably dry the grain, and to prevent a bad effect of quantity degradation by controlling the circulation rate of the grain under drying according to the quantity of the fuel to be supplied to a burner. CONSTITUTION: During the drying operation, a variable speed motor 12 is controlled by a deliver control device 36 so that the rotation of a delivery valve 2 is at low speed, standard speed, and high speed, and the quantity of the grain to be delivered and flow is controlled by the delivery valve 2, and the circulation speed of the grain is controlled by fuel volume to a set hot-air temperature set by a setting knob 33. At the same time, the temperature of the hot air to be generated from a burner 3 is controlled to the prescribed high value and low value according to the outside air temperature to be detected by an outside air temperature sensor 42, and the grain is dried. The grain temperature to be detected by a grain temperature sensor 43 is higher than the prescribed value during the drying operation, the burner 3 is stopped, and the ventilation drying mode where only the outside air is sucked and exhausted by an exhauster 8, is controlled to dry the grain. When the detected grain temperature is below the prescribed value, the burner 3 is re-started, and the grain is dried with hot air.