Intermediate cover of a filter housing of a filter for purifying liquid fluids and filter insert, filter and use

A filter comprising:

• a filter housing comprising a housing cup;
• a filter insert inserted in the housing cup of the filter housing, the filter insert configured to be mounted in the filter housing and removed from the filter housing by a rotary and insertion movement in respect to an axis;
• an intermediate cover inserted in the housing cup of the filter housing for separation of a filter receiving space for the filter insert from a centrifuge receiving space for at least one centrifuge separator and configured to be mounted in the filter housing and removed from the filter housing by a rotary and insertion movement in respect to the axis;
• wherein the intermediate cover comprises at least a portion of at least one clean fluid channel configured to form a fluidic connection between a clean fluid side of the filter insert and at least one fluid outlet of the filter housing for a purified clean fluid, wherein the at least one clean fluid channel comprises at least one inlet opening;
• wherein the filter insert comprises at least one connecting device, arranged at a first axial end face, axial in respect to the axis, of the filter insert, wherein the at least one connecting device of the filter insert is configured to connect to the intermediate cover;
• wherein the filter insert comprises at least one outlet opening for purified clean fluid arranged at the first axial end face of the filter insert, wherein the at least one outlet opening of the filter insert is configured to correspond to the at least one inlet opening of the at least one clean fluid channel of the intermediate cover;
• wherein the at least one outlet opening of the filter insert at least partially forms the at least one connecting device;
• wherein the intermediate cover further comprises:
• a centrifuge section formed as a wall and facing the centrifuge receiving space;
• a filter-side separation section facing the filter receiving space and spaced axially apart from the centrifuge section;
• wherein the at least one clean fluid channel extends radially, is arranged in the intermediate cover and is positioned axially between the filter-side separation section and the centrifuge-side separation section, the at least one clean fluid channel forming a first fluidic connection between a clean fluid side of the filter insert and at least one fluid outlet opening of the filter housing;
• and
• at least one raw fluid channel extending axially through both the centrifuge section and the filter-side separation section (88), the at least one raw fluid channel configured to form a second fluidic connection between a fluid inlet of the filter housing and the at least one centrifuge separator.