| 摘要 |
PROBLEM TO BE SOLVED: To realize miniaturization and a low cost for force feed equipment having a force feed section by a pump in a water storage tank by enhancing the exhaust capacity of drain and, at the same time, reducing the load to the pump. SOLUTION: A recessed portion 15 one step depressed from a bottom surface in the surrounding is formed at a bottom portion of the water storage tank 10 for temporarily storing drain and an auxiliary exhaust port 14 is provided at its side surface, and an auxiliary pipe 42 for performing natural flow due to deadweight of the drain is connected. A guide portion 16 sloped obliquely from the surrounding bottom surface is formed to the recessed portion 15 for easily collecting the drain remained at the bottom portion of the water storage tank 10. In this way, drain remained due to difficulty in force feed by a force feed section 20 can be discharged and this makes the bottom portion more healthy. Also, since discharge by natural flow is carried out in parallel to the force exhaust by the force feed section 20, the discharge capacity as a whole can be enhanced and then the pump capacity can be relatively reduced. |
