Damper-embedded ventilator

Abstract

A damper-embedded ventilator includes a housing which has an air flow chamber formed therein and is provided with an air discharge port communicating with the air flow chamber; an impeller rotatably connected to a rotary shaft of a motor and disposed in the housing; and a back draft damper for opening and closing the air discharge port. Each component in the ventilator can be disassembled by a simple attaching/detaching operation, a user can solve problems that have occurred in each of the components or easily perform maintenance such as cleaning, merely by directly disassembling each component in the ventilator sequentially.

What is claimed is: 
     
         1 . A damper-embedded ventilator comprising:
 a housing defining an air flow chamber therein and the housing is provided with an air discharge port communicating with the air flow chamber;   an impeller connected to a rotary shaft of a motor to be rotatable and disposed in the housing; and   a backdraft prevention damper configured to open and close the air discharge port,   wherein, the backdraft prevention damper is detachably mounted on the air discharge port in an interior of the housing.   
     
     
         2 . The damper-embedded ventilator according to  claim 1 , wherein the backdraft prevention damper is provided in a combined shape corresponding to an inner shape of the air discharge port to be inserted into and coupled to the air discharge port. 
     
     
         3 . The damper-embedded ventilator according to  claim 2 , further comprising:
 a coupling groove and a coupling boss formed on a plurality of contact surfaces of an outer surface of the backdraft prevention damper and an inner surface of the air discharge port to guide a coupling direction and a disassembling direction in an attachment direction or a detachment direction of the backdraft prevention damper and confine a coupling location of the backdraft prevention damper.   
     
     
         4 . The damper-embedded ventilator according to  claim 1 , wherein the impeller is a sirocco fan provided in a form of a cylindrical fan and configured to blow air in a tangential direction during a rotation thereof, and the air discharge port has a tubular shape extending from a rectangular cross-sectional shape to a circular cross-sectional shape to provide the air blown by the impeller to be smoothly discharged. 
     
     
         5 . The damper-embedded ventilator according to  claim 4 , wherein the backdraft prevention damper is provided in a combined outer shape corresponding to a circular cross-sectional shape of the air discharge port to be inserted into and matched with a portion having the circular cross-sectional shape. 
     
     
         6 . The damper-embedded ventilator according to  claim 1 , further comprising:
 an impeller attaching unit and an impeller detaching unit configured to couple the impeller and the rotary shaft of the motor to be detachable.   
     
     
         7 . The damper-embedded ventilator according to  claim 6 , wherein the impeller attaching unit and the impeller detaching unit further comprises a magnet provided at a connection portion of the impeller and the rotary shaft of the motor. 
     
     
         8 . A damper-embedded ventilator comprising:
 a housing defining an air flow chamber therein and the housing is provided with an air discharge port communicating with the air flow chamber; and   an impeller connected to a rotary shaft of a motor to be rotatable and disposed in the housing,   wherein as an impeller attaching unit or an impeller detaching unit configured to couple the impeller and the rotary shaft of the motor to be detachable, the rotary shaft of the motor comprises a magnetic material magnetically coupled to a magnet and has a shaft structure, wherein at least a portion of the shaft structure is surface-mounted, the impeller comprises a connection groove, wherein the rotary shaft is inserted into the connection groove, at a center of rotation thereof, and a magnet is provided inside the connection groove, the connection groove comprises a hooking step for a rotational direction of the rotary shaft in a state wherein the rotary shaft, a portion of the rotary shaft is surface-mounted, is inserted, and the hooking step is a structure that defines a gap for the rotational direction of the rotary shaft inserted into the connection groove.   
     
     
         9 . The damper-embedded ventilator according to  claim 8 , wherein the shape of a cross-section of the rotary shaft is perpendicular to an axial direction thereof has a shape having a portion of an arc with a chamfered circular shape, and the shape of a cross-section of at least a portion of the connection groove corresponding to the rotary shaft, wherein the portion of the arc has a chamfered circular cross-section occupies only a portion of the chamfered area by a cross-section of the hooking step, and has a shape of a circle surrounding an outskirt of the rotary shaft. 
     
     
         10 . The damper-embedded ventilator according to  claim 8 , wherein the hooking step has an inclined surface and the inclined surface guides an insertion of the rotary shaft from an insertion direction of the rotary shaft to an inward direction of the connection groove. 
     
     
         11 . The damper-embedded ventilator according to  claim 9 , wherein the hooking step has an inclined surface and the inclined surface guides an insertion of the rotary shaft from an insertion direction of the rotary shaft to an inward direction of the connection groove.