Ambient air purification device

An ambient air purification device comprising:

• a housing comprising at least one air inlet and at least one air outlet;
• at least one air flow generating device arranged in the housing and configured to generate an air flow from the air inlet to the air outlet;
• a filter device arranged in the housing between the air inlet and the air outlet in relation to the air flow, the filter device comprising a main filter element that comprises a plurality of filter medium bodies arranged in a V-shape relative to each other, and a prefilter element arranged upstream of the main filter element in regard to the air flow and comprising at least one filter medium body,
• wherein the main filter element comprises a circumferentially extending frame device,
• wherein the prefilter element comprises a circumferentially extending frame device,
• wherein the housing comprises a filter receiving region, and
• wherein the filter device is arranged in the filter receiving region comprising a protruding circumferentially extending contact shoulder;
• a clamping force generating device arranged in the housing and configured to exert, in a mounted state of the filter device, an axially directed clamping force on the circumferentially extending frame device of the main filter element,
• wherein, at an upstream end of the main filter element, the circumferentially extending frame device of the main filter element, in the mounted state of the main filter element, rests at the circumferentially extending frame device of the prefilter element, and
• wherein the axially directed clamping force is transmitted to the circumferentially extending frame device of the prefilter element;
• and
• a first circumferentially extending seal interposed between the circumferentially extending frame device of the prefilter element and the protruding circumferentially extending contact shoulder of the filter receiving region,
• wherein the circumferentially extending frame device of the prefilter element is pressed by the axially directed clamping force via the first circumferentially extending seal seal-tightly against the protruding circumferentially extending contact shoulder of the filter receiving region to seal the filter device in relation to the housing, and
• wherein the circumferentially extending frame device of the main filter element is sealed indirectly by the circumferentially extending frame device of the prefilter element in relation to the housing and comprises no seal location of its own in relation to the housing.