公开(公告)号：US20240252962A1

公开(公告)日：2024-08-01

申请号：US18692266

申请日：2022-09-19

Applicant: HYDAC Process Technology GmbH

Inventor： Bernhard Schlichter ,  Jörg Hermann Gerstner ,  Manfred Deutschmeyer ,  Dimitri Bugrov

IPC: B01D36/02 ,  B01D24/08 ,  B01D24/46 ,  B01D29/15 ,  B01D29/68 ,  B01D39/02

CPC classification number: B01D36/02 ,  B01D24/08 ,  B01D24/4636 ,  B01D29/15 ,  B01D29/682 ,  B01D39/02 ,  B01D2239/0428

Abstract: The invention relates to a filter apparatus, in particular in the form of a hollow cylinder (10) having a filter material (12), characterized in that a pre-filter (16) is mounted upstream of a surface filter (14) in the flow direction of a fluid stream to be cleaned from particulate contaminants, which pre-filter comprising a bulk material (18) for increasing the effective surface of the filter material (12), which bulk material is received between delimiting layers (20, 22) which are in each case provided with holes for fluids, the opening width of which is smaller than the diameter of a single grain (24) of the bulk material (18).

公开(公告)号：US11458424B2

公开(公告)日：2022-10-04

申请号：US16769296

申请日：2018-11-16

Applicant: HYDAC PROCESS TECHNOLOGY GMBH

Inventor： Bernhard Schlichter ,  Jörg Hermann Gerstner ,  Albert Kaints

IPC: B01D29/68 ,  B01D29/52 ,  B01D29/66

Abstract: A filter device has a filter housing (1) having a fluid inlet (8) for unfiltered matter and having a fluid outlet (9) for filtrate, and has at least one one-piece or multi-part filter insert (15, 17) held in the filter housing (1). Filter insert (15, 17) can be cleaned using a backwash device (25) having at least one backwash element (31) in counter flow to the direction of filtration. The backwash element can be moved along the inside of the relevant filter insert (15, 17) by a fluid-conveying drive shaft (29) of a rotary drive (69, 71). The individual backwash element (31) has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft (29) and which opens into a flow chamber connected to the drive shaft (29) in a fluid-conveying manner. At least one further backwash device (27) has a further backwash element (31). The fluid-conveying drive shaft (29) is divided into chambers (73, 75) separated from each other. One backwash element (31) of one backwash device (25) is connected to one of the chambers (73, 75). The other backwash element (31) of the other backwash device (27) is connected to another chamber (73, 75).