Air-bubble atomizing device

An air-bubble atomizing device for atomizing air bubbles contained in an air bubble liquid produced by mingling air bubbles with a liquid, comprising a production cylinder having an upstream end closed, a downstream end opening to form a release port and a cylindrical wall with a primary injection hole for obliquely injecting the air bubble liquid along a supposed line parallel to a supposed tangent line of an inner peripheral surface of said cylindrical wall and a secondary injection hole for injecting said air bubble liquid with displacement so as to bring the injected air bubble liquid close to the axial center of said cylinder with respect to the injection direction of said air bubble liquid injected from said primary injection hole, wherein a primary swirling liquid flow is produced by said air bubble liquid injected from said primary injection hole in said production cylinder while tangling and mingling a secondary swirling liquid flow formed by said air bubble liquid injected from said secondary injection hole with said primary swirling liquid flow, thereby to produce air microbubbles in said liquid.