| 摘要 |
PROBLEM TO BE SOLVED: To provide a water purifier capable of preventing a support part of a hollow fiber membrane filter from being damaged by the action of hydraulic pressure while securing a sufficient water flow rate in filtration.SOLUTION: A first hollow fiber membrane filter 80 and a second hollow fiber membrane filter 82 are connected in series and arranged inside a water purifier along the flow of raw water in such a state that only the raw water having passed the hollow fiber membrane filter 80 passes through the hollow fiber membrane filter 82, and the area Sof a passage cross section in a support part 92 of the hollow fiber membrane filter 82 located downstream of a flow is made larger than the area Sof a passage cross section in a support part 85 of the hollow fiber membrane filter 80 located upstream of the flow. |
