Filter holder, filter element and filter arrangement

1. An oval filter receptacle for a filter element ( 3 ) that, transversely to a longitudinal direction (LR) of the oval filter receptacle has an oval cross section, the oval filter receptacle comprising:

a receiving portion ( 19 ) configured to receive the filter element ( 3 ) and through which a fluid can flow radially;

a fluid inlet ( 24 ) for allowing fluid to be filtered (L) into the oval filter receptacle ( 2 ); and

a fluid outlet ( 25 ) for discharging the fluid (L) filtered with the aid of the filter element ( 3 ) from the oval filter receptacle ( 2 );

wherein the fluid outlet ( 25 ) is arranged such that an outflow direction (A) of the filtered fluid (L) from the fluid outlet ( 25 ) is oriented parallel to the longitudinal direction (LR) of the filter element ( 3 ); and

wherein the fluid outlet ( 25 ) has a circular cross section facing away from the filter element ( 3 ) and an oval cross section facing toward the filter element ( 3 );

wherein the circular cross section and the oval cross section of the fluid outlet ( 25 ) have the same cross-sectional area.

2. The oval filter receptacle as claimed in claim 1 , wherein

the fluid outlet ( 25 ) has a curved transition portion ( 49 ), which connects the circular cross section of the fluid outlet ( 25 ) to the oval cross section of the fluid outlet ( 25 ).

3. The oval filter receptacle as claimed in claim 2 , wherein

the fluid outlet ( 25 ) widens in a width direction (br) of the filter element ( 3 ) from the circular cross section to the oval cross section.

4. The oval filter receptacle as claimed in claim 2 , wherein

the fluid outlet ( 25 ) narrows in a height direction (hr) of the filter element ( 3 ) from the circular cross section to the oval cross section.

5. The oval filter receptacle as claimed in claim 1 , wherein

the oval filter receptacle ( 2 ) has a tubular incident-flow protection ( 48 ), configured to receive the filter element ( 3 ), at least in part.

6. The oval filter receptacle as claimed in claim 5 , wherein

the oval filter receptacle further comprises:

a maintenance cover ( 23 ) closing off an axial end of the receiving chamber of the receiving portion,

wherein the maintenance cover has a particle discharge opening ( 26 ) for discharging particles centrifugally separated in oval filter receptacle;

wherein the incident-flow protection ( 48 ) is integrally formed with the maintenance cover ( 23 ), the incident-flow protection ( 48 ) arranged radially over the tubular particle discharge opening ( 26 ),

wherein the maintenance cover ( 23 ) is configured as removable from the filter receptacle ( 2 ).

7. A filter arrangement ( 1 ) including:

an oval filter receptacle ( 2 ) as claimed in claim 1 ; and

a filter element ( 3 ) that, transversely to a longitudinal direction (LR) thereof, has an oval cross section, the filter element comprising:

a first end plate ( 7 );

a second end plate ( 8 ), and

a hollow oval filter medium ( 3 ) arranged between the first end plate ( 7 ) and the second end plate ( 8 );

wherein the hollow oval filter medium ( 3 ) has a cross section having a radial width measured from a radial interior of the hollow oval filter medium ( 3 ) to a radial exterior of the hollow oval filter medium ( 3 );

wherein the cross section of the hollow oval filter medium ( 3 ) at the second end plate ( 8 ) is larger than a cross section of the filter medium ( 3 ) at the first end plate ( 7 ) such that a radial width of the cross section of a hollow oval filter medium increases starting from the first end plate ( 7 ) in a direction towards the second end plate ( 8 );

wherein the filter element is received in a receiving portion ( 19 ) of the filter receptacle ( 2 ).