| 摘要 |
<p>PURPOSE:To omit a pump pit of a drainage tank, a sewage tank or the like, and to prevent a motor temperature rising accident. CONSTITUTION:A drainage single pipe 17 is provided to communicated with a discharge port 16, a branch pipe 18 diverging from the drainage single pipe 17 is provided, an injection nozzle 23 is arranged on the tip of the branch pipe in such a manner as to direct to the upper side of a motor 11 for a submergible pump, and some of discharged water is always injected from the injection nozzle to the motor, thereby cooling the motor.</p> |
