公开(公告)号：US20230055123A1

公开(公告)日：2023-02-23

申请号：US17793365

申请日：2021-01-29

申请人： AKIMOKU IRON WORKS CO., LTD. ,  AKITA UNIVERSITY

发明人： Akira NAKAGAWA ,  Wataru SUGIYAMA

IPC分类号： B01F23/2373 ,  B01F23/232 ,  B01F25/31 ,  B01F25/313 ,  B01F25/10 ,  B01F35/71

摘要： A fine bubble generator which is an ultrafine bubble generator includes a side wall whose inner face is cylindrical, and closing walls closing both ends of the side wall, respectively, with a gas-liquid discharge port in one of the closing walls, wherein a fluid inlet port is provided closer to the gas-liquid discharge port than is a midpoint between both closing walls, and the fluid inlet port penetrates the side wall in a tangential direction of the inner face of the side wall, wherein a spiral groove is formed in the inner face of side wall, and wherein the spiral groove has an angle of inclination of 1° to 10°.