| 摘要 |
PROBLEM TO BE SOLVED: To provide an insect filter system capable of preventing invasion of foreign matters such as insects while feeding air to inside of a facility during replacement of a filter of a filter device, in the filter device mounted to an outside air introduction duct for air conditioning ventilation in the facility requiring a clean space. SOLUTION: A first filter device 5 including a filter casing 2 interposed in the intermediate portion of the outside air introduction duct 7 for air conditioning ventilation and forming part of the outside air introduction duct 7 for air conditioning ventilation, a filter fixing frame 3 detachably provided within the filter casing 2 and the filter 4 nipped by the filter fixing frame 3 and covering an opening 2a of the filter casing 2 is provided in the outside air introduction duct 7 for air conditioning ventilation. A second filter device 5' for blocking invasion of insects from outside is detachably provided on the outdoor side from the filter 4 of the first filter device 5. COPYRIGHT: (C)2010,JPO&INPIT |
