| 摘要 |
<p>The present invention relates to a hydro-cleaning multistage filter device developed to filter raw water such as valley water, underground water, or lake water and a water filtering method using the same, and more specifically, to a hydro-cleaning multistage filter device which improves filtration performance by interconnecting a filtering means equipped in a housing and filtering inflowing raw water with a plurality of wrinkle filters, arranging gradually and filtering the same step by step, and extends life span of the filtering means using a back washing means, and to a filtering method of filtering raw water stage by stage using the multistage filtering device.</p> |
