| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a microair bubble generating nozzle which can effectively mass-generate microair bubbles through a process to make it more microsized. Ž<P>SOLUTION: This microair bubble generating nozzle 1 is aimed at the generation of microair bubbles by receiving the supply of an aqueous solution obtained by dissolving gases with the help of a gas dissolving device. In addition, the nozzle 1 includes an air bubble outlet hole 17 formed in the circumferential wall of a pressure release chamber 11 with a contact wall surface 15 with which the air bubble is brought into contact, in order to make microsized the air bubbles generated by passing the aqueous solution through an orifice 7 and a netting member 9. The sectional area of a fluid passage 19 arranged around the circumference of the pressure release chamber 11 is made to be almost equal to the sectional area of the air bubble outlet hole 17. Further, an air bubble generation/micronization promoting chamber 21 is installed halfway through an outlet passage leading to an outlet 25 from the fluid passage 19. This chamber 21 has a contact wall surface 27 intended for generating a vortical current in the fluid containing the air bubbles to be ejected from the fluid passage 19 and thus agitating the fluid, as well as promoting the generation of the air bubbles by releasing the pressure and making the air bubble more microsized through bringing the air bubbles into contact with the contact wall surface 27. The contact wall surface 27 is roughened. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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