MICRO-BUBBLE GENERATOR

A microbubble generator is described, that generate micro bubbles without adopting the complicated prior art venturi tube structure. One embodiment has a water supply side joint on one end of a main tube which is formed as a cylinder and a water drain side joint on the other. The two joints are connected with a water channel that runs along the axis of the tube, and in the middle of said channel there is a narrower, restricted channel whose internal diameter is 6 millimeters or less. A water supply side channel is constituted between the supply side joint and the restricted channel, and a water drain side channel is constituted between the restricted channel and the drain side joint, and both the supply side channel and the drain side channel have a larger diameter than that of the restricted channel and are formed as non-tapered, straight holes along the axis