| 摘要 |
PURPOSE:A closed drier is divided into the upper and the lower drying chambers, the humidity of each drying chamber is maintained almost to a preset level with a humidifier and a fan, and laver is dried with hot air having regulated humidity. CONSTITUTION:A closed drier 6 is divided with an intermediate floor 20 into the upper drying chamber 4 and the lower drying chamber 24 which are furnished with suction ports 9, 29 and exhaustion ports 8, 28 closable with shutters. Hot air generated by combustion furnaces 2, 22 is circulated in the drying chambers 4, 24 with the fans 3, 23. The humidity values in the drying chambers 4, 24 are detected by the humidity sensors 5, 25. When the detected humidity is lower than a preset level, the humidifiers 10, 30 are energized, and when it is higher than the preset level, the fans 7, 27 are energized, the shutter is operated to open the suction and exhaustion ports 9, 29, 8, 28 to open the drying chamber 4, 24,and hot air having regulated humidity is supplied and circulated to the drying chambers 4, 24. |
