| 摘要 |
A method and apparatus (10) for cleaning passageways such as air ducts or flues. The apparatus (10) includes a body having a nozzle, or plurality of nozzles, rotatably coupled to it. A cage (12) 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 t he 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 (10) is placed in a duct or ventilation passageway, preferably at the highest vertical location of th e passageway. Fluid is then passed through the nozzle spraying and cleaning th e 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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