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发明授权
CN106139666B 双层滤网前置过滤器及其工作方法 有权 转让

双层滤网前置过滤器及其工作方法
摘要：
本发明涉及一种双层滤网前置过滤器及其工作方法，其特征在于：其中双层滤网前置过滤器包括过滤器壳体、设在过滤器壳体内的滤芯和切换阀，以及连接在过滤器壳体上的阀头组，所述滤芯具有两层套置的滤网，所述阀头组安装在滤芯的第一端，所述切换阀安装在滤芯的第二端，所述滤芯外层滤网与过滤器壳体内壁之间形成第一隔腔，所述滤芯内、外层滤网之间形成第二隔腔，所述滤芯内滤网内腔为第三隔腔，所述切换阀切换第一隔腔与第二隔腔的通断。本发明双层滤网前置过滤器结构简单、设计合理，有利于实现过滤，正冲洗，反冲洗内、外层滤网功能，高效实用。
摘要（英）：

A filtering device includes a hollow body, a filtering core assembly securely received inside the body and composed of an outer filtering core and an inner filtering core securely received inside the outer filtering core. A first switch device is mounted at a bottom end of the body and operably connected to a bottom of the filtering core assembly. A second switch device is mounted at a top end of the body and operably connected to a top of the filtering core assembly. A first chamber is defined between an inner face of the body and an outer periphery of the outer filtering core. A second chamber is defined an inner periphery of the outer filtering core and an outer periphery of the inner filtering core. A third chamber is defined inside the inner filtering core, wherein the first switch device controls communication between the first chamber and the second chamber.

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