| 摘要 |
PURPOSE:To deal with bending of a duct, a change in sectional area and the point of a damper and to easily feed in an air hose so that the duct is internally and uniformly cleaned by sucking a withdrawing means by the suction effect of a dust collector connected to the duct and feeding the air hose into the duct while actuating the air hose. CONSTITUTION:The cleaning method for the duct 1 consists in connecting the dust collector 4 to the duct 1, mounting a bag body 7 as the withdrawing means consisting of a freely shrinkable and deformable three-dimensional body to the proper position near the front end of the air hose 6 for shaking off dust and attracting the bag body 7 by the suction effect of thee dust collector 4, thereby actuating the air hose 6 and feeding the air hose into the duct 1 to clean the duct. The bag body 7 is sucked when the dust collector 4 is actuated by this constitution, by which the air hose 6 for dusting is withdrawn according to this constitution. The air hose advances while shaking off the dust on the inside surface of the duct 1 with its front end. The shaken-off dust is sucked by the dust collector 4. |
