| 摘要 |
<p>PURPOSE: To exhibit excellent aeration effect by increasing an air sucking quantity from an air suction pipe of a water stream generator and also making the underwater retaining time of air bubbles discharged from the outlet of an diffuser longer as much as possible. CONSTITUTION: A changeover valve 3 is fixed at a discharge port 2A of an underwater pump 2, and an inlet 4A of an ejector 4 is connected with one side port of this changeover valve 3 and an inlet 5A of a sprinkling pipe 5 is connected with another side port of the changeover valve 3. On the other hand, an air suction pipe 6 is branched and connected with a suction room 4C inserted with a throttling part 4B of the ejector 4, and a position of the suction room 4C is set over the water level WL and also an outlet 4e at the tip of the diffuser 4D is sunk in water, and the inside of the diffuser 4D communicates with the throttling part 4B via a circulation pipe 7 for circulating a portion of air bubble mixed water.</p> |
