FILTERING APPARATUS

摘要

A filtering apparatus with a plurality of filtering elements (9) which can be accommodated in a filter housing (1) having a filter inlet (45) for fluid to be filtered and a filter outlet (43) for the filtered fluid, wherein during the filtration operation, at least one of the filtering elements (9) can be back-flushed by means of a back-flushing device (13, 21) in order to dedust the effective filtering surface of said filtering element, the back-flushing device comprising a pressure control device (13) for assisting the back-flushing operation, is characterized in that the pressure control device comprises a hydraulic accumulator (13), the one fluid chamber (67) of which can be filled during the filtration operation with a quantity of dedusted fluid and can be connected for a back-flushing operation via a back-flushing guide (21) to the clean side (59) of the filtering element (9) to be dedusted, and in that, for a back-flushing operation, a further fluid chamber (79) of the hydraulic accumulator (13) can be subjected to a media pressure in order, by means of a resultant movement of the separating element (65) of the hydraulic accumulator (13), to at least partially again dispense the filling amount of the dedusted fluid for the back-flushing operation from the first fluid chamber (67).

主权项

1. A filtering apparatus with a plurality of filtering elements (9), which can be accommodated in a filter housing (1), having a filter inlet (45) for the fluid that is to be filtered and a filter outlet (43) for the filtered fluid, wherein, during the filtration operation, at least one of the filtering elements (9) can be back-flushed by means of a back-flushing device (13, 21), containing a pressure-control device (13) for supporting the back-flushing operation, in order to clean the effective filtering surface of said filtering element, characterized in that the pressure-control device contains a hydraulic accumulator (13), one fluid chamber (67) of which can be filled during the filtration operation with a volume of cleaned fluid and can be connected for a back-flushing operation, via a back-flushing guide (21), to the clean side (59) of the filtering element (9) to be cleaned, and in that a further fluid chamber (79) of the hydraulic accumulator (13) can be pressurized with a media pressure in order to again discharge, by means of a movement of the separating element (65) of the hydraulic accumulator that has been caused thereby, the filling volume of the cleaned fluid for the back-flushing operation, at least in part, from the first fluid chamber (67).