AIR FILTER AND FILTER ELEMENT Russian patent published in 2020 - IPC B01D46/24 

FIELD: separation.

SUBSTANCE: invention is intended for filtration. Hollow filtration element for removal of dust and liquid mixed with compressed air comprises inner filter element surrounding central part in the form of space, and external filtering element surrounding external periphery of internal filtering element. Upper end cover, including inlet hole for supply of compressed air into central part in form of space, is attached to upper end parts, which are first ends of internal filtering element and external filtering element in axial direction. Lower end cover closing the lower end part of the central part in the form of space is attached to the lower end parts, which are the second ends of the internal filter element and the external filtering element in the axial direction. Outer periphery of lower end portion of inner filter element is surrounded by inner wall formed in lower end cover, wherein outer periphery of lower end part of outer filter element is surrounded by outer wall, blocking compressed air flow, and wherein upper end surface of outer wall is located higher than upper end surface of inner wall. Vertical dimension of wall part of outer wall located above inner wall and surrounding external periphery of external filtering element is larger than vertical dimension of wall part of inner wall surrounding outer periphery of inner filter element. Outlet channel for fluid to discharge fluid collected by inner filter element and outer filter element is formed between outer wall and inner wall, wherein fluid outlet channel communicates with fluid outlet communicating with lower end cap bottom surface. Bottom end part of outer filter element adjoins upper end surface of inner wall.

EFFECT: technical result: simplicity of design, prevention of mixing again of liquid collected by filter element, with cleaned compressed air.

11 cl, 11 dwg