| 摘要 |
PROBLEM TO BE SOLVED: To easily detach an air filter without removing a suction grill, by deforming the air filter by elasticity, and at the same time by correcting deformation on forming. SOLUTION: A correction means for correcting an air filter 7 is provided at the rear part of an insertion/removal port or on the rear surface of the base edge part of the air filter 7 that opposes the rear part of the insertion/ removal port. A filter guide 6 is provided in a casing 2, where the filter guide 6 is stretched to the insertion/removal port and detachably guides a filter guide reception part to an inner surface side in a suction grill 5. When the air filter 7 is detachably mounted, the air filter 7 is inserted from the insertion/removal port and at the same time is subjected to elastic deformation for guiding to the inner surface side of the suction grill 5 by the filter guide 6, and the deformation of the air filter 7 is corrected by the correction means for mounting. |
