| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a dust extractor capable of enhancing the circumferential environment without making the dust extractor large-sized by effectively trapping dust at a place where a large quantity of dust occurs such as the execution site of a tunnel or the like. <P>SOLUTION: The dust extractor 1 is equipped with a suction device 2 for sucking dust occurring in a dust occurrence place R. Further, a charger 3 for applying a high negative voltage to the dust F sucked by the suction device 2 is provided to charge the dust F with the high negative voltage. Furthermore, water W is sprayed on the dust F charged with the high negative voltage from a water sprinkler 4. Since potential difference is generated between the dust F and the water W adjusted to earth potential (0 V), the dust F can be trapped certainly by water W. <P>COPYRIGHT: (C)2004,JPO</p> |
