| 摘要 |
PURPOSE:To eliminate the water quality problem due to detergent and the like and improve the efficiency of water-saving in a drain water recycling device by constructing a gate type car-washing machine installed in a gasoline station and the like to send out two kinds of water of different qualities by switching in accordance with the method of car-washing. CONSTITUTION:For washing a car by the use of wax, an underwater pump 8 pumps up the service water via a nonreturn valve 10 from a clean water tank 7 by the command of a car-washing machine, and supplies the water to this gate type car-washing machine 1. At this time, a water-stop valve 11 of a treated water tank 6 is closed. For ordinary washing, the water-stop valve 11 is opened, and the treated water in the treated water tank 6 is pumped up by the underwater pump 8 for supplying to the car-washing machine 1. The drain water after washing is sent to a drain water recycling device 4 for treatment via a pit 2 and a pump 3, and supplied to the treated water tank 6. This construction permits to use the service water for using wax or the like for eliminating the water quality problem and improving the efficiency of water-saving in the drain water recycling device. |
