Filter element for a filter system having a resonator structure, and filter system having a resonator structure

A filter system comprising:

• a filter housing comprising at least a housing top part and a housing bottom part;
• a filter element configured to be exchangeably arranged in the filter housing and comprising:
• a hollow cylinder-type filter bellows surrounding an interior of the filter element, the filter bellows having an end face;
• a bottom at an end face of the filter bellows, wherein the bottom is substantially closed;
• at least one first resonator structure formed on the substantially closed bottom of the filter element and configured to provide noise attenuation of a flowing fluid, wherein the at least one first resonator structure comprises two or more grooves formed on an outer side of the substantially closed bottom of the filter element and facing away from the interior of the filter element, wherein the two grooves are separated from each other by a first partition;
• wherein at least one of the two or more grooves is connected in fluid communication through an opening extending through the substantially closed bottom of the filter element into the interior of the filter element;
• wherein the housing bottom part comprises an inner side and further comprises a second resonator structure complementary to the at least one first resonator structure of the filter element, wherein the second resonator structure is arranged at the inner side of the housing bottom part and comprises two grooves separated from each other by a second partition;
• wherein the at least one first resonator structure of the filter element, when the filter element is installed in the filter housing, seals tightly relative to the complementary second resonator structure of the housing bottom part;
• wherein the two grooves of the at least one first resonator structure are connected in fluid communication through connection openings arranged in the at least one first resonator structure of the filter element or arranged in the second resonator structure of the filter housing.