| 摘要 |
A filter device having a plurality of filter elements (23) that can be received in a filter housing (1) having a filter inlet (19) for a fluid that is to be filtered and a filter outlet (21) for the filtered fluid, wherein flow can pass through the filter elements (23) for a filtration or backwash in both directions and wherein at the same time at least one filter element (23) performs the filtration and at least one other filter element (23), for cleaning off the active filter surface thereof, can be backwashed by means of a backwash appliance which, for supporting the backwashing, contains a pressure control appliance (43) which has a pressure control element (45) by means of which, during a backwash operation, the fluid flow is controllable in a fluid connection between filter inlet (19) and the filter element (23) that is to be cleaned off, is characterized in that the fluid connection has a connection space (29) having element openings (27) each of which can be connected to an open end of the filter cavity forming the unfiltered side of each filter element (23), in that a fluid pathway (27) is provided via which, during the filtration, unfiltrate flows into the connection space (29) and in that, by means of the pressure control element (45), the flow of unfiltrate through the element opening (27) associated with the filter element (23) that is to be cleaned off can be controlled. |
| 主权项 |
1. A filter device having a plurality of filter elements (23), which can be received in a filter housing (1) having a filter inlet (19) for a fluid that is to be filtered, and a filter outlet (21) for the filtered fluid, wherein flow can pass through the filter elements (23) in both directions for filtration or backwash, and wherein at the same time, at least one filter element (23) performs the filtration, and at least one other filter element (23) for cleaning off the active filter surface thereof can be backwashed by means of a backwash mechanism, which includes a pressure control mechanism (43) for supporting the backwash, which has a pressure control element (45), by means of which the fluid flow in a fluid connection, between filter inlet (19) and the filter element (23) that is to be cleaned off, can be controlled during a backwash operation, characterized in that the fluid connection has a connecting chamber (29) having element openings (27), each of which can be connected to an open end of the filter cavity forming the unfiltered side of each filter element (23), in that a fluid pathway (27; 63) is provided, by means of which unfiltrate flows into the connecting chamber (29) during filtration, and in that, by means of the pressure control element (45), the flow of unfiltrate though the element opening (27), associated with the filter element (23) that is to be cleaned off, can be controlled. |
