| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain device in which a floating matter in a drain tank and a drainage in a basilar part can be discharged together, and when the floating matter is aspirated, a large amount of air is contaminated, and a submerged pump arising an air lock is prevented.SOLUTION: In a drain tank 2, a suction port 42 is provided on an underside, and a submerged pump 4 that discharges the water storage W to an outside is disposed. In a lower side of the submerged pump 4, a confluent passage part 5 having first and second end connections 55, 56 is disposed at an upper wall part 51, the first end connection 55 is communicated with the suction port 42 of the submerged pump 4 and the second end connection 56 is communicated with an accessory passage part 6, respectively. The accessory passage part 6 has an accessory suction port 61 that suctions from an upper water face of the drain tank 2. The confluent passage part 5 is disposed with an inflow opening part 54 in which water storage of the drain tank 2 inner lower part inflows. The water storage including a floating matter from the accessory suction port 61 of the accessory passage part 6 and the water storage of the drain tank 2 inner lower part from the inflow opening part 54 are performed by confluence at the confluent passage part 5 respectively and aspirated to the submerged pump 4. |
