| 摘要 |
PURPOSE:To provide a circulating clarification apparatus for a bath tub which is easy to regenerate microorganism filter mediums and has a long life of a biological filtration device. CONSTITUTION:Water in a bath tub can be clarified sufficiently in a short time by lowering the opening of a motor-operated valve 7, switching the 1st and 2nd motor-operated three-way valves 11, 12, forming a jet pipeline of the arrow D and a filtration pipe-line of the arrow E, and increasing the inflow of water into a filter 9 by circulating water by the operation of the 1st pump 6. On the other hand, the regeneration of microorganism filter mediums 15 in a biological filtration device 16 can be improved by increasing air inflow by allowing the motor-operated valve 7 full admission, switching the 3rd and 4th motor-operated three-way valves 20, 21, forming the 2nd clarification pipeline of the arrow H, increasing the pressure and amount of water flowing into an ejector 25 by the simultaneous operation of the 1st and 2nd pumps 6, 18. |
