| 摘要 |
PURPOSE:To prevent a decrease in an exhaust efficiency and an increase in noise without reducing removability of a decorative grill in a ventilator for a duct. CONSTITUTION:An engaging part 13 and a holding jig 14 are so installed as not to disturb a suction port 9 of a blower under an orifice plate 10. The part 13 is engaged with a grill engaging part 18 of a decorative grill 20 by one linear spring 17 thereby to simply and effectively attach or detach the grill 20. Only the fine spring 17 exists under the port 9, and hence increases in ventilation resistance and noise at the time of operating can be prevented. |
