| 摘要 |
PURPOSE:To detect wind-speed of exhaust air by arranging a wind-speed sensor on the exhaust duct of the evacuating apparatus of an image forming device and to maintain exhausting performance by increasing the revolving speed of a fan, when filters are clogged and the wind-speed is reduced. CONSTITUTION:The exhaust duct 10 arranged on the exhaust part of the image forming device is arranged with a fan 11 and a dust filter 13 and is constituted so as to process dust and ozone included in exhaust air. The wind-speed sensor 20 is arranged inside the exhaust duct and detection information is outputted to a controller 21 to control the rotational speed of the motor 12 of the fan 11 in accordance with the wind-speed inside the exhaust duct. When the filters are clogged and flow resistance becomes high, the revolving speed of the fan is increased, displacement is maintained constant and heat, the dust, the ozone, etc., can not be confined in a device. |
