Importance

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Abstract

Under the rated load amount of 'Normal' and 'Extra' drying degrees, a drying process carried out after the detections of the plurality of resistance values a passing time of at least one resistance value selected from among of the plurality of resistance values is predicted is carried out. The hot air operation time in accordance with the measured time is calculated, and the hot air operation during the calculated hot air operation time is carried out. When under the small load amount, a drying process is carried out in the form of a hot air operation by calculating a necessary time for 'Damp' drying degree under a small load amount in accordance with a time for passing a predetermined resistance value after a lapse of a constant time from the start of drying operation. When one of 'Semi', 'Normal' and 'Extra' drying degrees under the small load amount is selected, a hot air operation is carried out at a constant time according to the calculated time for 'Damp' drying degree.

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First Claim