| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator device for a partitioned room in which a superior responding characteristic against a pressure variation within the partitioned room can be attained and there occurs no problem of generating noise when a valve is opened or closed. SOLUTION: A side wall 6 of a partitioned room 10 is provided with an opening 9 passing therethrough. A plastic short cylindrical base 1 made of plastic material is fitted into the opening 9, an outer surface side of the base 1 is covered with a cover 2 having a ventilating hole 7. An inner bottom wall 1a slanted inwardly of the base 1 is provided with a ventilating hole 4 and then a valve plate 3 made of silicone rubber closing the ventilating hole 4 from its outer surface side is fixed to the inner bottom wall 1a. |
