| 摘要 |
A method and apparatus for cleaning passageways such as air ducts or flues. The apparatus includes a body having a nozzle, or plurality of nozzles, rotatably coupled to it. A cage is coupled to the body and circumscribes the rotative path of the nozzle or nozzles. The nozzles are configured such that passage of fluid through the nozzle's orifice propels the apparatus along a defined axis. The nozzles may be further configured such that passage of fluid through the nozzle's orifice imparts a rotating motion of the nozzle about the defined axis. The apparatus is placed in a duct or ventilation passageway, preferably at the highest vertical location of the passageway. Fluid is then passed through the nozzle spraying and cleaning the interior of the duct. The propelling force of the spray causes the apparatus to maneuver its way through the duct system, including through angular transitions, until it travels the entire pathway of the duct.
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