| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a simple air diffusion plate capable of keeping oxygen dissolving efficiency regardless of a secular change by preventing the clogging of a non-expansible and not-contractible air diffusing element, and an air diffuser not stopped in operation even at the time of the occurrence of clogging to prevent a water tank from being emptified, capable of easily replacing the air diffusing element and easy in workability. <P>SOLUTION: The air diffusion plate 20 is equipped with the non-expansible and not-contractible air diffusing element 11 and the flexible diaphragm 15 installed on the downstream side of the air diffusing element 11 and having an air passing hole 14 and constituted so that no space is provided between the air diffusing element 11 and the diaphragm 15 when stopping air diffusion and the undersurface diaphragm 15 is bent downward by the air passing resistance of the air diffusing plate 11 when sending air to enable air ventilation. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
