| 摘要 |
<p>A vortex generator (20) for use in a fluid filter (10) operable in both a normal filtering mode and a back flushing mode. The vortex generator including a flapper valve (28) that moves between an open position and a closed position in correspondence to the direction of fluid flow through the fluid filter. In the open position, fluid is permitted to flow through openings formed in a base of the vortex generator. In the closed position, fluid is prevented from flowing through the openings.</p> |
