The methods that produce micro-bubbles are classified roughly into two different types, ones that move the water in a chamber, and mix it with the air introduced from the outside of the chamber, and ones that produce micro-bubbles in the stationary water in the chamber. eco-Bubble® adopts the former method, and it is referred to as "Swirling Fluid Flow type". This method has following two big advantages.
The micro-bubble generator usually consists of a nozzle and pump to send the water to the nozzle.
(1) A large amount of micro-bubbles can be produced from the nozzle.
(2) The nozzle is not clogged easily even in the treatment of waste water and muddy water.
The patent technique (DDHRS) for the nozzle for producing micro-bubbles
DDHRS:Dual-chamber/Dual-vortex/High-speed Rotation System （Patent information）
Water is carried to the chamber by the pump, and descending outer vortex and ascending inner one of the water are created in it.
The inner vortex can rotate much faster than the outer one, and creates an air column at the center of the vortex with a strong negative pressure, sucking air from outside the nozzle.
Around the top of the air column, it collapses due to the friction with the water, and the air turns to micro-bubbles.
Click the picture above to expand
[ Attention please after 17 seconds from the start of the video clip]
The power supply to the pump stops, and the air column created at the center of the inner chamber of the nozzle collapsed. The remaining small air-bubbles in the chamber moves toward the outer side, due to the centrifugal force of the rotating inner vortex, but they can not move outside the boundary between the inner and outer vortex. Then, we are able to confirm the presence of double vortex visually.