PROBLEM TO BE SOLVED: To provide a fine air bubble generator with a more simple structure capable of efficiently generating air fine bubbles in a liquid by introducing gas into the liquid without installing a gas feeding apparatus such as a compressor and a compression cylinder.SOLUTION: The air fine bubble generator includes a liquid storage part 1 for storing the liquid, a liquid-jet nozzle 2 arranged in the liquid of the liquid storage part and having a liquid outlet part 2a, a gas-suction nozzle 3 arranged on an outer edge part of the liquid outlet part and having a gas outlet part, and a flow rate controller 6 for controlling the flow rate of the gas flowing out from the gas outlet part 3a. The air fine bubble generator is characterized in that the gas outlet part is arranged in a flow passage of the liquid jetted from the liquid outlet part, a negative pressure generation part is generated on a downstream edge part of the gas outlet part, and the gas is automatically sucked into the liquid.COPYRIGHT: (C)2012,JPO&INPIT【課題】コンプレッサーや圧縮ボンベなどの送気装置を設置することなく液体中に気体を導入し、液体中に微小気泡を効率よく発生させることのできるより簡便な構造の微小気泡発生装置を提供すること。【解決手段】液体を収容するための液体収容部1と、前記液体収容部の液体中に配置され、液体出口部2aを有する液体噴出ノズル2と、前記液体出口部の外縁部に配置され、気体出口部を有する気体吸引ノズル3と、前記気体出口部3aから流出する気体の流量を制御する流量制御装置6と、を備え、前記気体出口部を前記液体出口部より噴出される液体の流路内に配置し、前記気体出口部の下流縁部に負圧発生部を生じさせ、液体中に気体を自動吸引することを特徴とする微小気泡発生装置。【選択図】図1
