| 摘要 |
PURPOSE:To precisely inform the user of the exchanging time of a deodorizing filter by calculating the signals from odor sensors provided before and behind the filter by a control means, and displaying the result by a display means in accordance with the calculated result of the control means. CONSTITUTION:A suction port 2 and an exhaust port 3 are provided to the main body 1, and air cleaning filters 6a and 6b are opposed to the suction port 2. The air cleaned by the filters is supplied to the outside from the exhaust port 3 by a fan 5 provided in the main body 1. The concentration of odor is detected by the odor sensors 14 and 15 provided before and behind the filter. The signals from the sensors are calculated by the control means 17, and the calculated result is displayed by the display means 16 in accordance with the output of the control means 17. As a result, the user is informed that the filter must be exchanged, when the capacity of the deodorizing filter 6b is decreased. |
