| 摘要 |
<p>A cleaning head for a filter backwashing mechanism comprises a nozzle 3 for contact with a filter element wall 1 and for receiving a flow of backwash fluid 10 wherein the nozzle comprises a rotor 3 for generating a torque when exposed to the flow of backwash fluid 10, and wherein the cleaning head is arranged such that at least a part of the nozzle will move toward and apply a force to the filter element wall 1 as a result of the torque generated by the rotor 3.</p> |
