| 摘要 |
<p>A novel water jetting method capable of expanding a washing range two-dimensionally without involving a nozzle movement. A nozzle head (170) has, directly under a water-jet hole (31), a washing water vortex chamber (171) communicating with the head via a small-diameter communication path (163). The vortex chamber (171), being a hollow chamber having a tilted inner wall, is connected with a head flow path (34) eccentrically. Washing water flowing into the vortex chamber (171) via the head flow path (34) is jetted out from the water-jet hole (31) in the form of a spiral (conical) swirling water jet while swirling along the inner wall of the vortex chamber as shown by an arrow SY.</p> |
