JPS6446569A - Drying controller for cereal drier - Google Patents

Abstract

PURPOSE: To prevent grains from being overheated by correcting the value measured by means of a weighing device this time by subtracting an increment when the measured value increases from the value measured by means of the gravimeter last time and finding the mean drying of the grains based on the corrected measured value. CONSTITUTION: A calculating means C calculates the loss on drying of dried grains from the weight of a drier containing fed grains which is detected by means of a weighing device from time to time and a calculating means D calculates the target hot-blast temperature of a burner 10 at which the calculated mean drying coincides with a target value. A burner control means E feedback-controls the burning of the burner 10 with the signal of a hot-blast temperature sensor 25 based on the calculated target hot-blast temperature. When, for example, a man climbs the main body of the drier and the value measured by means of the weighing meter 23 this time increases while the mean drying is controlled, an increment calculating means A calculates the increment and a correcting means B corrects the value measured this time by subtracting the increment from the value and calculates the mean drying in the conventional way based on the corrected value. Therefore, the grains can be prevented from being overheated.