PROBLEM TO BE SOLVED: To provide a gas-liquid mixer capable of preparing liquid containing air bubbles of nano-level which can enlarge an application range on industry and, at the same time, can prevent air entrainment.SOLUTION: Fine air bubble generation means which turns supplied gas into fine air bubbles to diffuse the air bubbles into liquid is arranged on the neighborhood of a suction port part of a submerged pump immersed under liquid and, on the other hand, gas-liquid mixing means which further makes the fine air bubbles finer and evenly mixes the fine air bubbles with the liquid is connected to an ejection port part of the submerged pump. Therein, the gas-liquid mixing means includes a gas-liquid supply path communicated with the ejection port part of the submerged pump and dispersion-mixing channels which are communicated with the gas-liquid supply path, cause the air bubbles and liquid to flow while meandering the air bubbles and liquid, and make the air bubbles fine to perform dispersion and mixing into liquid, and a number of dispersion-mixing channels are communicated while leaving intervals in the axial direction and in the circumferential direction of the gas-liquid supply path and cause liquid containing air bubbles to flow out from a terminal part of each dispersion-mixing channel.COPYRIGHT: (C)2015,JPO&INPIT【課題】産業上の利用範囲を拡大することができるナノレベルの気泡混じりの液体を生成することができるとともに、エア噛みを防止することができる気液混合装置を提供すること。【解決手段】液体中に浸漬した水中ポンプの吸入口部の近傍に、供給された気体を微細気泡となして液体中に散気する微細気泡生成手段を配設する一方、水中ポンプの吐出口部に、微細気泡をさらに微細化するとともに液体と均一に混合する気液混合手段を接続して構成し、気液混合手段は、水中ポンプの吐出口部と連通する気液供給路と、気液供給路に連通して気泡と液体を蛇行させながら流動させるとともに、液体中に気泡を微細化して分散・混合する分散・混合流路とを具備し、分散・混合流路は、気液供給路の軸線方向と周方向に間隔をあけて多数連通して、各分散・混合流路の終端部から気泡混じりの液体を流出させるようにした。【選択図】図2
