To provide a minute air bubble generator which can effectively reduce jetting noise.
In the minute air bubble generator, minute air bubbles are produced by releasing pressure of air-liquid dissolving fluid where gas is dissolved in liquid under pressure by a pressure reducing means and are ejected from an ejection nozzle 30. A Venturi tube 12b which is the pressure reducing means is provided at a nozzle body 29 of the ejection nozzle 30. A cylindrical protrusion 29b projecting in an ejection direction than an ejection port 12c of the Venturi tube 12b is formed. At an inner peripheral surface of the protrusion 29b, a cylindrical sound absorption sheet 35 is held by being inserted inside. At an inner peripheral surface of the sound absorption sheet 35, a cylindrical silent mesh 36 which is a metallic mesh-like body is held by being inserted inside.
COPYRIGHT: (C)2011,JPO&INPIT
MAEDA YASUNARI
YAMAGUCHI SHIGEYUKI
NIBU TAKAYA
KITAMURA HITOSHI
ITO YOSHIYASU
| JP2006175294A | 2006-07-06 | |||
| JP2006167612A | 2006-06-29 | |||
| JPH03229097A | 1991-10-11 |
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