Filtering device for removing liquid particles from air streams of air compressors

Claim 1

A filtering device for removing liquid particles from air streams of air compressors comprising a housing with an open side of which the interior is divided by a first partition and a second partition into three successive compartments, a first one, a second one, and a third one with the first partition sandwiched between the first and the second compartments and the second partition sandwiched between the second and the third compartments, a lid with an interior space which covers the open side of said housing and seals thereon by suitable sealing means, a vane-type impeller which is rotatably disposed in the first compartment, a perforated cover with an air stream hole completely covering said vane-type impeller, a first filter layer disposed in an air passage between the first and the second compartments to remove liquid from air streams when they follow from the first compartment to the second compartment, a second filter layer disposed in an air passage between the second and the third compartments to further remove liquid from the air streams when they go on following into the third compartment, a plurality of liquid reservoirs which are in fluid connection with said housing to receive the liquid removed from the air streams therein and drain the liquid off with a drain line connected thereto, an air inlet which is formed on said housing so as to provide a fluid connection between the first compartment and an air supply conduit which is connected to an air compressor, and an air outlet which is in fluid connection to the third compartment and an air exhaust conduit so that air is exhaustible from the third compartment, said air stream hole being so formed on said perforated cover that when pressurized air coming from said air supply conduit passes through said air stream hole, the pressureized air stream will hit said vane-type impeller eccentrically and rotated said vane-type impeller so as to create circulation of air inside said perforated cover which will remove liquid particles from air due to centrifugal force and leave liquid particles on the inside surface of said perforated cover.