| 摘要 |
<p>PROBLEM TO BE SOLVED: To hold therein an ultra-low humidity at low cost by providing a timer control circuit having a plurality of controlling functions and providing a time difference between a recyclably energizing heating time to a heater and an opening/closing time of a shutter, thereby preventing a backflow of a moisture absorption residual water content of a desiccant thereinto. SOLUTION: The automatic dryer adapted to a long-term storage of an electronic component such as a semiconductor or the like, food or the like comprises a dry unit 4 having a desiccant 8 and a heating material 7 for heating the desiccant 8 to recycle it. The unit 4 has shutters 10, 11 for opening/closing an indoor vent port 6A and an outdoor vent port 6B. The shutter. At the time of opening the port 6A and closing the port 6B under the control of a timer control circuit 30, high humidity air therein is dehumidified by the desiccant. At the time of closing the port 6A and opening the port 6B, the air of the state containing the moisture discharged from the desiccant is exhausted outdoor to hold therein an ultra-low humidity.</p> |
