| 摘要 |
<p>PURPOSE:To conserve energy and to economically construct an apparatus, by always measuring the dew point of dry air by a dew point sensor and simultaneously performing the dehumidification of compressed air in all of plural adsorbing towers for a considerable period at the point of time when the dew point was fallen to a first predetermined one. CONSTITUTION:Left and right adsorbing towers 1, 11 according to a cycle system are alternately operated and, when the dew point of dry air at a dry air outlet 20 reached a first predetermined dew point (e.g., -60 deg.C), the left and right adsorbing towers 1, 11 are allowed to simultaneously perform the dehymidification of air on the basis of the signal from a dew point sensor 10 always measuring the dew point of the aforementioned dry air. Subsequently, when the dew point of dry air reached a second predetermined dew point (e.g., -40 deg.C), both adsorbing towers 1, 11 are returned to the cyclic system by the signal of the aforementioned sensor 10. Further, when the dew point of dry air reached the aforementioned first dew point, the left and right adsorbing towers 1, 11 are allowed to again simultaneously perform the dehumidification of air. As a result, energy is conserved and an apparatus can be economically constructed.</p> |
