US 12,440,811 B2
Bubble generation device and liquid filtration device
Hiroshi Noguchi, Singapore (SG); Akitoshi Nakagawa, Tokyo (JP); and Terutake Niwa, Singapore (SG)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/027,043
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Aug. 31, 2021, PCT No. PCT/JP2021/031993
§ 371(c)(1), (2) Date Mar. 17, 2023,
PCT Pub. No. WO2022/059479, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 2020-157636 (JP), filed on Sep. 18, 2020.
Prior Publication US 2023/0321614 A1, Oct. 12, 2023
Int. Cl. B01F 23/231 (2022.01); B01D 65/02 (2006.01)
CPC B01F 23/231 (2022.01) [B01D 65/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A bubble generation device configured to intermittently form a gas passing through a turnaround path as a bubble, the bubble generation device comprising:
a gas storage chamber that stores a liquid therein and stores a gas supplied into the liquid above the liquid;
the turnaround path that communicates with an upper portion of the gas storage chamber, extends downward, turns back, and extends upward; and
a bubble discharge chamber that communicates with a bubble discharge port for discharging the bubble, wherein
a plurality of sets of the gas storage chamber and the turnaround path are provided,
the bubble discharge port opens upward,
the bubble discharge port has an elongated shape extending in a substantially horizontal direction,
each of a plurality of the turnaround paths includes a first communication port communicating with the gas storage chamber and a second communication port communicating with the bubble discharge chamber on a downstream side of the turnaround portion of the turnaround path in a gas traveling direction, a lowering portion extending downward from the first communication port, a turnaround portion turning back upward from below, and a rising portion extending upward from the turnaround portion and reaching the second communication port, and communicate with the bubble discharge chamber common to the second communication ports,
each of the bubble discharge chamber and a plurality of the gas storage chambers includes an opening facing downward at a lower end,
a shape of each of the lowering portion, the turnaround portion, the rising portion, and the bubble discharge chamber is a shape extending along a longitudinal direction of the bubble discharge port,
a shape of each of the first communication port and the second communication port is a shape extending along the longitudinal direction, and
a cross-sectional area of the bubble discharge chamber in the horizontal direction is equal to or more than a sum of an opening area of the second communication port in each of the plurality of the turnaround portions.