FILTERING ELEMENTS, AIR CLEANING UNITS AND METHODS OF APPLICATION AND ASSEMBLY Russian patent published in 2024 - IPC B01D46/24 B01D46/52 

FIELD: technology of water and air purification.

SUBSTANCE: invention is intended for air cleaning. Filter cartridge comprises a filter padding comprising a folded padding which covers a central open volume, wherein the filtering padding extends from the first end of the filtering padding to the second end of the filtering padding; insert serving as a support for folded packing, which covers central open volume, wherein the insert extends from the first end of the insert to the second end of the insert; first open end nozzle and a second closed end nozzle, wherein the first end of the filtering padding and the first end of the insert pass into the first open end nozzle; the second end of the filtering packing and the second end of the insert pass into the second closed end nozzle; first open end nozzle comprises an inner surface, which forms an opening passing through the first open end nozzle, wherein the filter cartridge is characterized by the presence of a central axis passing through the central open volume, a second end nozzle and an opening in the first end nozzle; inner surface is located between the first end of the insert and the axis of the cartridge filter and includes a sealing surface, configured to form a seal sealing the sealing surface of the air cleaner; and the inner surface comprises a plurality of outwardly projecting and axially extending portions and a plurality of inwardly extending and axially extending portions.

EFFECT: provision of tightness of cartridge installation, improvement of service.

17 cl, 52 dwg