Backwashable liquid filter

摘要

A backwashable liquid filter is provided which has a filter element 17 throughflow passes radially and which is mounted so as to be able to rotate about its axis. In addition, a backwash device 18 is provided which has a dirt removal channel 27 which runs in parallel to the axis of the filter element 17. The filter element 17 can be rotated within the filter housing 14 by a drive apparatus 23. When the filter element 17 is backwashed, cleaned liquid flows through the filter insert into the dirt removal channel 28, removes the dirt particles adhering to the filter element and feeds these to the dirt removal channel 27. For precleaning of the filter element 17, a spring-mounted scraper is connected upstream of the backwash device 28. This scraper removes the coarse dirt situated on the surface of the filter element. The filter element has slot-like orifices each of which surrounds a flexible tongue. These flexible tongues have the advantage that these can be moved out from their normal position during cleaning and thus effective cleaning of the filtration gap is performed. <IMAGE>