| 摘要 |
<p>PURPOSE: To realize an apparatus capable of automatically purifying water quality in a lake or the like. CONSTITUTION: In a water flow generator provided with a water flow generating part 23 disposed in the bottom layer 16 of a closed water region and a driving water pump 25 disposed in the front layer 15, sensors 26a, 26b disposed respectively in the front layer 15 and bottom layer 16 in the closed water region to detect the concentration of dissolved oxygen and a controller 29 to input detecting signals from the sensors 26a, 26b and drive a driving water pump 25 with the rotationary frequency corresponding to the concentration difference between respective dissolved oxygen are provided. Thus, the driven water pump 25 can be automatically run in accordance with a change in water quality to efficiently prevent the water quality from deteriorating.</p> |
