Microbubble generating device

A fine bubble generating device comprising a pump for pumping a liquid fluid from a liquid, a gas introducing inlet for introducing gas into the liquid fluid, and a fine bubble generating section used in the liquid for generating fine bubbles in the liquid fluid from the gas introduced from the gas introducing inlet and the liquid fluid pumped out from the pump and discharging the liquid fluid and the fine bubbles to the liquid, the fine bubble generating section comprising:

• a container body;
• a first liquid fluid introducing inlet provided on the container body for introducing the liquid fluid pumped out from the pump into the container body;
• a discharging outlet provided on the container body for discharging the liquid fluid introduced from the first liquid fluid introducing inlet;
• a liquid fluid swirling section provided in the container body for making the liquid fluid introduced from the first liquid fluid introducing inlet swirl in a spiral toward the discharging outlet;
• and
• a discharged flow volume adjusting section comprising:
• a baffle board that is movable in an approximately perpendicular direction to an end face of the discharging outlet by the swirled liquid flow generated by the liquid fluid swirling section,
• an axle extending along an axial direction approximately perpendicular to the end face of the discharging outlet and supported by the container body, and
• an insertion bore of the baffle board through which the axle is inserted, the axle being inserted through the baffle board so that the baffle board is movable in the axial direction of the axle through the insertion bore.