公开(公告)号：US20210348106A1

公开(公告)日：2021-11-11

申请号：US17284926

申请日：2019-10-23

Applicant: USUI CO., LTD.

Inventor： Toshifumi KASHIWAGI ,  Iwane SUZUKI

IPC: C12M1/00 ,  C12M1/34 ,  B01F3/04 ,  B01F5/10 ,  B01F15/00

Abstract: The gas dissolution device includes a dissolution vessel storing a part of culture solution in a culture vessel, a gas supply pipe connected to a carbon dioxide cylinder and supplying carbon dioxide through an end inserted into the dissolution vessel, a gas discharger provided at the gas supply pipe and turning the carbon dioxide into microbubbles, and a mass flow controller controlling a flowrate of the carbon dioxide flowing in the gas supply pipe. Here, a water depth from the gas discharger to a liquid level of the culture solution in the dissolution vessel is set deeper than a water depth of the culture solution in the culture vessel.