| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the damage to a long-sized light source in the case of removing a cleaning element. SOLUTION: A housing 2 for supporting a fan motor is integrally provided at the center part of a casing 1 of almost square tubular shape, and the fan motor is supported to this housing. A fan is connected to a rotating shaft of the fan motor, and the air discharge side of the fan is provided with a long-sized light source receiving member 8, a long-sized light source 9, a main filter eliminating even fine dust, and a front grille in this order.
|
