FILTER APPARATUS WITH FILTER CLEANING ARRANGEMENT

摘要

In a filter apparatus with a filter for filtering a liquid including, in a housing, a filter structure which is rotatably supported off-center so that it is arranged at one side in close proximity to the housing wall and at the opposite side a housing space is formed in which at least one nozzle tube with nozzle openings directed toward the filter structure and advantageously also an ultrasound transducer are arranged for removing deposits from the filter structure. A liquid inlet is connected to filter housing bottom wall in the area of the housing space and a return pipe is connected to the bottom wall in communication with a center passage of the filter structure for discharging cleaned liquid. The liquid inlet includes a valve for blocking the water flow and a drain opening for draining cleaning liquid during filter cleaning.

主权项

1. A filter apparatus for filtering contaminated liquids, particularly the water of pools, comprising:
a cylindrical filter housing (2) including side walls and bottom and top end walls 20, 21 attached to the side walls so as to close the filter housing (2), an annular filter structure (1) with a central passage (22) rotatably supported by the bottom and top end walls (20, 21) in an off-center position so that the filter is arranged at one side in close proximity of the side wall of the housing (2) so that from the area of closest proximity of the filter to the cylinder housing the space between the filter structure (1) and the wall of the cylindrical housing (2) widens continuously whereby, at the side opposite the area of closest proximity, the filter is arranged spaced from the side wall so as to form adjacent the filter structure (1) a housing space (24) extending over the length of the filter structure (1), two cleaning nozzle tubes (3) with nozzles (19) arranged in the housing space (24) in spaced relationship so as to extend along the filter structure (1) and having nozzle openings directed toward the filter structure (1) for washing deposits off the filter structure (1) during cleaning operation of the filter structure (1), the cleaning nozzle tubes (3) being pivotally supported so as to permit adjustment of the direction of the orientation of the nozzles (19) toward the filter structure (1), a drive device (9) disposed on the top end wall (21) with a drive shaft (23) extending through the top end wall (21) for rotating the filter structure (1), a supply pipe (4) connected to the bottom end wall (20) of the filter housing in the area of the housing space (24) for conducting pool water to the housing space and around the filter structure (1) and directing the pool water through the filter structure (1) into the central passage (22) of the filter structure (1), a return pipe (5) connected to the bottom end wall (20) of the filter housing in axial alignment with the central passage (22) of the filter structure (1) for receiving the filtered water and conducting it back to the pool, and a valve device (13) arranged in the supply pipe (4) for blocking the water flow to the filter structure (1) and having a drain opening (26) for draining the wash water from the filter structure (1) during cleaning operation.