Structure of DDHRS

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


画像の説明

Descending outer vortex and ascending inner one of the water are created in the inner chamber. The inner vortex can rotate much faster than the outer one, since the radius of the inner one is less than half of the outer one. The high speed rotation of the inner vortex creates the air column at the center of the vortex with a strong negative pressure, and realizes the increase of air intake from the outside of the chamber and production of large amounts of micro-bubbles.
     patent information


    Click the picture above to expand

A video clip that shows the inner vortex and production of micro-bubbles

[ Attention please after 50 seconds from the start of the video ]
The presence of double vortex of the water can be confirmed in the video. 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 to 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.