| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water discharge device which can impart sufficiently large flow velocity fluctuation to water discharge without using a large-sized pump and which can form a sufficiently large water mass even when the distance from water discharge to water landing is short. <P>SOLUTION: A water discharge device generates large air bubble BA with a larger cross-sectional area than the cross-sectional area of the flow passage in an injection port 10b when viewing the inside of a water storage room 10 from the injection port 10b, and the flow velocity of jet flow WSm is changed by forming the large air bubble BA intermittently. <P>COPYRIGHT: (C)2013,JPO&INPIT |
