| 摘要 |
PURPOSE: It continues the number in which valve is and closes opened according to need and which rapidly changes the direction of the air pressure actuating on the filter. The filter in which the clogging phenomenon generates can be recovered in the fast time to the steady- state. CONSTITUTION: A multi-head vacuum cleaner comprises a main body(20), a vacuum sucking motor unit(30), and a filter(40). The main body comprises a dust sucking port. The vacuum sucking motor unit is installed in the main body in order to be connected to inlet and filters the dust from inlet. The vacuum sucking motor unit is arranged a plurality parallel with inlet. A filter(40) is installed between the vacuum sucking motor unit and inlet. The pressure sensor is installed between the vacuum sucking motor unit and filter. The pressure sensor is installed in the inner part of the main body, is connected to the dust collector with the vacuum sucking motor unit.
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