Patent ID: 8961640
Filing Date: 2015-02-24
Classification: B01D,B04C,F04B

Abstract:
1. A filter for removing foreign matter contained in air to purify the air, comprising: a separation unit including a primary port to which the air is supplied, a cylindrical swirl flow generating chamber communicating with the primary port via a receiving hole located above the swirl flow generating chamber, a separation chamber located below the swirl flow generating chamber and communicating with the swirl flow generating chamber, and a secondary port causing purified air in the separation chamber to flow out; a discharge pipe arranged at a central portion of the swirl flow generating chamber to guide purified air to the secondary port; and a cylindrical blade portion formed by arranging a plurality of blades in a cylindrical form, each of which extends in an axial direction along an inner peripheral surface of the swirl flow generating chamber and inclines in the circumferential direction, wherein the air supplied from the primary port and inflowing into the swirl flow generating chamber in the axial direction is swirled to remove foreign matters contained in the air, wherein the cylindrical blade portion swirls the air supplied from the primary port while letting the air flow in a radially-inward direction.