| 摘要 |
PURPOSE:To easily withdraw an air hose and to uniformly clean the inside of a duct by putting a guide member connected to the air hose into the duct, withdrawing this member by the suction effect of a dust collector, hauling the member to withdraw the member further to the dust collector side, removing the guide member, actuating the air hose and pulling the air hose in an opposite direction. CONSTITUTION:The dust collector 4 is connected to a chamber 3 and a hollow spherical body 10 is put into the duct 1 for air conditioning from its aperture. The hollow spherical body 10 is sucked by the suction effect of the dust collector 4 and is moved in the duct 1 toward the chamber 3. The hollow spherical body 10 is taken out and a fine cord 9 is hauled upon arrival at the chamber 3. As a result, the rope 8 as the guide member is pulled and eventually the front end of the air hose 6 is withdrawn into the chamber 3. The rope 8 is thereafter removed and while the air hose 7 is actuated, the air hose is pulled in the opposite direction at a prescribed speed. The shaken-off dust is sucked into the dust collector 4. |
