Patent ID: 9233327
Filing Date: 2016-01-12
CPC Classification: B01D,B04C

Claim Text:
1. A filter for separating foreign matter from air, comprising: a separation unit having a port block and a separation cylinder which is attached to the port block, the port block having a primary port to which the air is supplied, the separation unit being formed with a swirl flow generating portion which changes the air supplied from the primary port into swirl flow, and a separation chamber communicating with the swirl flow generating portion, wherein the port block further has a secondary port which causes purified air obtained by separation of foreign matter in the separation chamber to flow out, and an exhaust port is formed at a lower end portion of the separation unit; a collection container attached to the separation unit, the collection container having a storage chamber in which foreign matter exhausted from the exhaust port of the separation unit is stored; an exhaust pipe arranged at a central portion of the swirl flow generating portion to guide purified air to the secondary port; and a lock member attached to the outside of the separation cylinder, wherein the lock member has a first state to prevent the separation cylinder from being detached from the port block, and a second state to allow the separation cylinder to be detached from the port block. wherein the separation unit has a conical portion formed with a conical surface reduced in diameter toward the exhaust port, wherein the conical portion is formed with a communication hole through which the separation chamber and the storage chamber communicate with each other, wherein the communication hole is above the exhaust port.