Catalyst unit

Abstract

A catalyst unit may include a carrier that channels may be formed from a front surface thereof to a rear surface thereof, and plugs that closes the channels that may be formed along an edge portion of the front surface except a central portion of the front surface, wherein a coating layer may be not formed in the channels that the plugs may be disposed and a coating layer may be formed along the remaining opened channels.

1 . A catalyst unit, comprising:
 a carrier that channels are formed from a front surface thereof to a rear surface thereof; and   plugs that closes the channels that are formed along an edge portion of the front surface except a central portion of the front surface, wherein a coating layer is not formed in the channels that the plugs are disposed and a coating layer is formed along the remaining opened channels.   
     
     
         2 . The catalyst unit of  claim 1 , wherein the opened channels that the plugs are not formed thereon have an inlet and an outlet that are opened, and exhaust gas flows into the inlet and flows out of the outlet. 
     
     
         3 . The catalyst unit of  claim 1 , wherein an outlet of the channels that inlets thereof are closed by the plugs are closed by plugs. 
     
     
         4 . A manufacturing method of a catalyst unit, comprising:
 extruding a carrier that channels are formed therein from a front surface to a rear surface;   plugging channels that are formed along an edge portion of the front surface by plugs; and   coating catalyst along opened channels that are not plugged by the plugs.   
     
     
         5 . The manufacturing method of a catalyst unit of  claim 4 , wherein the front surface of the carrier is dipped into a catalyst solution, which is wash coat, and the catalyst solution is sucked from the rear surface of the carrier through the opened channels such that the catalyst solution coats along an interior surface of the opened channels in the process for coating the catalyst solution. 
     
     
         6 . An exhaust gas purification device, comprising:
 an exhaust line that exhaust gas passes therethrough;   a converter housing being disposed on the exhaust line and having a converter cone portion formed near the exhaust line;   a catalyst unit that is disposed within the converter housing and reduces harmful material of the exhaust gas,   wherein an inlet of channels in the catalyst unit that is formed near the converter cone portion is closed by plugs to form closed channels, coating layer is not formed along the closed channels, and coating layer is formed along an interior surface of remained opened channels.   
     
     
         7 . The exhaust gas purification device of  claim 6 , wherein a diameter of the converter cone portion is larger than that of the exhaust line.