Diffuser

Abstract

The present disclosure relates to a diffuser which is connected to a duct and discharges air that is guided by the duct, and the diffuser according to the exemplary embodiment of the present disclosure includes: a diffuser frame which has a discharge port having a slot or quadrangular shape; a damping bar which is installed in the discharge port of the diffuser frame so as to be movable upward and downward, closes the discharge port of the diffuser frame while being moved upward, and opens the discharge port of the diffuser frame while being moved downward; a motor which is installed in the damping bar, and provides rotational power; and a screw shaft which has one side supported by the diffuser frame, and the other side connected to the motor, and moves the damping bar.

What is claimed is: 
     
         1 . A diffuser which is connected to a duct and discharges air that is guided by the duct, the diffuser comprising:
 a diffuser frame which has a discharge port having a slot or quadrangular shape;   a damping bar which is installed in the discharge port of the diffuser frame so as to be movable upward and downward, closes the discharge port of the diffuser frame while being moved upward, and opens the discharge port of the diffuser frame while being moved downward;   a motor which is installed in the damping bar, and provides rotational power; and   a screw shaft which has one side supported by the diffuser frame, and the other side connected to the motor, and moves the damping bar upward or downward by being supplied with rotational power from the motor.   
     
     
         2 . The diffuser of  claim 1 , wherein the damping bar includes:
 a bar main body which has a motor accommodating portion having an open side; and   a bar cover which is detachably coupled to the bar main body, and covers the opening of the motor accommodating portion,   wherein the motor is separably accommodated in the motor accommodating portion of the bar main body.   
     
     
         3 . The diffuser of  claim 1 , wherein a pair of motors is installed at both sides of the damping bar which are opposite to each other. 
     
     
         4 . The diffuser of  claim 1 , further comprising:
 a supporting block which has a screw nut coupled to one side of the screw shaft; and   a supporting bracket which is coupled to an upper portion of the diffuser frame in a direction that intersects with a longitudinal direction of the discharge port, and supports the supporting block.   
     
     
         5 . The diffuser of  claim 1 , further comprising:
 a stopper which is coupled to one end of the screw shaft.   
     
     
         6 . The diffuser of  claim 1 , further comprising:
 a chamber which connects the duct and the diffuser frame, and changes a flow direction of air that is guided by the duct.   
     
     
         7 . The diffuser of  claim 1 , further comprising:
 a printed circuit board (PCB) which is embedded in the damping bar, and controls an operation of the motor.   
     
     
         8 . The diffuser of any one of  claim 1 , wherein the damping bar engages with the discharge port of the diffuser frame in a projection-and-recess engagement and closes the discharge port of the diffuser frame, when the damping bar is moved upward, a discharge flow path having a predetermined length is formed between a part of an outer surface of the damping bar and a part of an inner surface of the diffuser frame which forms the discharge port, when the damping bar is moved downward, and a discharge flow rate of air, which is discharged through the discharge port, with respect to an opening degree is controlled in a linear manner using flow path resistance of the discharge flow path. 
     
     
         9 . The diffuser of  claim 8 , wherein a part of the outer surface of the damping bar and a part of the inner surface of the diffuser frame, which engage with each other and close the discharge port, are formed to be inclined. 
     
     
         10 . The diffuser of  claim 8 , further comprising:
 a sealing member which is coupled to the damping bar, and surrounds the discharge port while coming into contact with the inner surface of the diffuser frame, when the damping bar closes the discharge port.