| 摘要 |
PURPOSE:To keep the airtight capacity of a hot experimetal equipment or a radioactive waste material processing equipment by a method wherein the control of the minute pressure difference between rooms and the power saving control of ventilation are performed simultaneously. CONSTITUTION:In an air supply and discharge equipment in which a single draft chamber 2 or a plurality of such chambers is or are provided in a single room 1 so that the pressure difference between the interior of the room and the outside of the room is kept constant irrespective of whether or not the room is used and at the same time, the capacity of an air exhauster 3 is controlled according to the condition of the draft chamger 2, an ON-OFF damper 5 is interposed in an exhaust duct 4 for the draft chamber 2 so that the damper 5 is opened and closed in response to signals from a sensor 6 for detecting the use condition of the chamber 2 while a pressure difference adjust damper 8 is interposed in an air supply duct 7 leading to the room 1 so that the damper 8 is opened and closed in response to signals from a pressure difference detecting sensor 9 for detecting the pressure difference between the room and the outside the room. Further, variable air quantity blowers are used as an air exhauster 3 and an air supplier 10 and the quantities of air from the air exhauster 3 and the air supplier 10 are controlled by a microcomputer 11 on the bases of the use condition of the draft chamber 2, the periodical change in the pressure loss in the air supply and discharge system and the pressure difference between the interior of the room and the outside of the room so that the equipment is kept airtight.
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