公开(公告)号：US11759755B2

公开(公告)日：2023-09-19

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： B01F3/04 ,  B01F23/2373 ,  B01F25/31 ,  B01F35/71 ,  B01F25/313 ,  B01F23/232 ,  B01F25/10 ,  B01F25/00

CPC分类号： B01F23/2373 ,  B01F23/232 ,  B01F25/104 ,  B01F25/311 ,  B01F25/3133 ,  B01F35/71805 ,  B01F2025/9321

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°.