| 摘要 |
A device (10) for alternately applying pressure and vacuum to pipes (42) in order to remove or prevent build-up of undesirable coatings inside the pipes is disclosed. The device (10) includes a pressure and vacuum source (340) connected to a plenum (60) having a hose (30) attached to the plenum (60) at a proximal end (31) and a control mechanism (320) attached to the hose (30) near a distal end (32). The control mechanism (320) is operable to control the plenum (60) to rapidly switch between variable amounts of vacuum and pressure to the hose (30). The plenum (60) may also be controlled to supply neither vacuum nor pressure to the hose. The device (10) may be used in a wide variety of settings, including industrial, commercial, marine hospitality industry, and household settings. |
