Bubble generation device and liquid filtration device

A bubble generation device configured to intermittently discharge bubbles from each of a plurality of bubble discharge ports, 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;
• a turnaround path that communicates with an upper portion of the gas storage chamber, extends downward, turns back, and extends upward;
• the plurality of bubble discharge ports that discharge the gas passing through the turnaround path as bubbles;
• and
• a bubble discharge chamber that communicates with each of the plurality of bubble discharge ports, wherein
• a plurality of sets of the gas storage chamber and the turnaround path are provided,
• each of the plurality of the turnaround path includes a first communication port communicating with the gas storage chamber, a second communication port communicating with the bubble discharge chamber on a downstream side of a turn-around point 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 plurality of bubble discharge ports is opened upward and arranged in a straight line,
• opening areas of the plurality of bubble discharge ports are the same as each other,
• a shape of each of the lowering portion, the turnaround portion, the rising portion, and the bubble discharge chamber is a shape extending along an arrangement direction of the plurality of bubble discharge ports,
• a shape of each of the first communication port and the second communication port is a shape extending along the arrangement direction and
• a sum of the opening areas in the plurality of the bubble discharge ports is smaller than a sum of an opening area of the second communication port in each of the plurality of the turnaround portions.