| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure without requiring a high-speed water current, in a bubble generator including a jet nozzle jetting a jet water current including bubbles into a bathtub. <P>SOLUTION: An orifice 23 for jetting a jet water current provided at a downstream end of a jet nozzle 20 comprises a first orifice 23a at an upstream side and a second orifice 23b at a downstream side having a sectional area larger than that of the first orifice 23a. The second orifice 23b including a level difference part 29 having an expanded cross-section area at least a part in a circumferential direction is continuously provided at downstream end of the first orifice 23a. A negative pressure generated at a back surface of the level difference part 29 is used to suck the bubbles into the water current passing through the orifice 23 at a relatively low speed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
