Filtering device for cleaning surface water from e.g. street drainage, has outflow opening through which air is blown into filter unit, where opening is formed as component of air injecting channel that enables outlet-side air feeding

摘要

#CMT# #/CMT# The device (19) has a filter unit (42) arranged with a filter material at a filter housing (28) between an inlet (38) and an outlet (39). The material is made to flow by water to be cleaned at filter operation. A cleaning device cleans the unit by rinse water and air at a cleaning operation, and comprises an air outflow opening (49) arranged on sides of the inlet. Air is blown into the filter unit through the air outflow opening for cleaning purposes. The opening is formed as a component of an air injecting channel (50) that enables outlet-side air feeding from a side of the outlet. #CMT# : #/CMT# An independent claim is also included for a filtration system for cleaning surface water from a roof drainage or a street drainage. #CMT#USE : #/CMT# Filtering device for cleaning surface water from a roof drainage or a street drainage (all claimed). #CMT#ADVANTAGE : #/CMT# The air is blown into the filter unit through the air outflow opening for cleaning purposes, and the air outflow opening is formed as the component of the air injecting channel that enables outlet-side air feeding from the side of the outlet, thus cleaning the filter material of the filter unit by the air and/or the rinsing water with reduced time in a simple and cost-effective manner and handling the filtering device in an easy manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a longitudinal sectional view of a filtering device with a blocking element in a blocking position. 19 : Filtering device 28 : Filter housing 38 : Inlet 39 : Outlet 42 : Filter unit 49 : Air outflow opening 50 : Air injecting channel.