| 摘要 |
<p>The filter consists of a tubular grid, which is e.g. a monolithic plastic moulding with longitudinal ribs forming a circular row round the moulding. The ribs are covered by a coarse fabric mesh (I) and then a fine filter fabric (II). A liq., esp. drinking water, flows through fabric (II) first, and then through fabric (I); and the filtered water is removed from the interior of the tubular grid. Fabric (I) is elastic, and is forced inwards onto the grid by the pressure of the water being filtered. When the water is switched off, the spring in fabric (I) forces the latter outwards, thus pushing fabric (II) so particles collected on fabric (II) fall off, thus increasing the working life of the filter.</p> |
