| 摘要 |
PURPOSE:To remember filter replacement when necessary by informing a user that the life of a filter has reached the end by means of a previously set process, when the service life of the filter has expired. CONSTITUTION:In a supporting frame 42, the filter 45 is mounted between the exhaust port and the fan 43, so that a suction device is constituted. With respect to the filter 45, metallic nets 452 and 453 cover both sides of a cylindrical outer frame 451; high permeability paper is attached to its inside, and a deodorant 454 is filled in the inside of it. When a detecting means (microcomputer) 51 detects that the life of the filter 45 has reached the end, the processing means (microcomputer) 51 produces a warning sound and performs a previously set processing such as inactivating a device itself. Since the operation of the process makes a user perceive that the service life of the filter 45 has expired, filter replacement, etc., can be speedily performed. |
