| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bubble generator which generates a large amount of fine bubbles whose radius is roughly 50μm or shorter, preferably 30μm or shorter, while substantially reducing power without adding a chemical agent such as a surfactant, and is easily manufactured, and to provide an air diffuser. <P>SOLUTION: The air diffuser 12 includes: a gas chamber 16; a gas inflow pipe 18 for making a gas flow into the gas chamber 16; and a diffusion part 24 for diffusing the gas which has flowed in from the gas chamber 16 into liquid outside and making it flow out as bubbles. The diffusion part 24 is configured by laminating at least two planar members 30 and 32 which have many diffusion holes 30a and 32a in the inside respectively and comprise materials of different modulus of longitudinal elasticity while communicating the diffusion holes 30a and 32a with each other. The hole diameter of the diffusion holes 30a provided on one planar member 30 comprising the material of the larger modulus of longitudinal elasticity is larger than the hole diameter of the diffusion holes 32a provided on the other planar member 32 comprising the material of the smaller modulus of longitudinal elasticity. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
