Air purifier

Abstract

An air purifier includes a blower which selectively supplies air in a first direction and a second direction based on forward/reverse rotation, a first air vent located on the first direction side of the blower, a second air vent located on the second direction side of the blower, a purification filter located on an upstream side of the second air vent based on the second direction, a third air vent located on an upstream side of the blower based on the first direction, and a damper which opens/closes the third air vent.

What is claimed is: 
     
         1 . An air purifier comprising:
 a blower which selectively supplies air in a first direction or in a second direction opposite to the first direction based on forward/reverse rotation;   a first air vent located on a first direction side of the blower;   a second air vent located on a second direction side of the blower;   a purification filter located on an upstream side of the second air vent based on the second direction;   a third air vent located on an upstream side of the blower based on the first direction; and   a damper which opens/closes the third air vent.   
     
     
         2 . The air purifier of  claim 1 , further comprising
 a controller configured to selectively drive the blower in the first direction and the second direction, respectively, in an air blowing mode and an air purification mode.   
     
     
         3 . The air purifier of  claim 1 , wherein
 the damper opens the third air vent by a blowing pressure when the blower is driven in the first direction.   
     
     
         4 . The air purifier of  claim 3 , further comprising
 an elastic member which applies, to the damper, an elastic force in a direction to close the third air vent.   
     
     
         5 . The air purifier of  claim 1 , wherein
 the third air vent is located on a downstream side of the purification filter based on the first direction.   
     
     
         6 . The air purifier of  claim 1 , wherein
 the third air vent is located on an upstream side of the blower based on the first direction.   
     
     
         7 . The air purifier of  claim 1 , wherein
 the blower is provided in plural.   
     
     
         8 . The air purifier of  claim 7 , wherein
 a plurality of is are arranged in parallel to each other.   
     
     
         9 . An air purifier comprising:
 a housing provided with a first air vent, a second air vent, and a third air vent between the first air vent and the second air vent, wherein a flow path of air is formed in the housing;   a blower arranged between the second air vent and the third air vent;   a controller configured to drive the blower in forward/reverse directions to discharge the air in a first direction toward the first air vent in an air blowing mode and to discharge the air in a second direction toward the second air vent in an air purification mode;   a damper which opens the third air vent by a blowing pressure in the first direction; and   a purification filter located on an upstream side of the second air vent based on the second direction.   
     
     
         10 . The air purifier of  claim 9 , wherein
 the damper closes the third air vent by a blowing pressure in the second direction.   
     
     
         11 . The air purifier of  claim 9 , further comprising
 an elastic member which applies, to the damper, an elastic force in a direction to close the third air vent.   
     
     
         12 . The air purifier of  claim 9 , wherein
 the third air vent is located on a downstream side of the purification filter based on the first direction.   
     
     
         13 . The air purifier of  claim 9 , wherein
 the third air vent is located on an upstream side of the blower based on the first direction.   
     
     
         14 . The air purifier of  claim 9 , wherein
 the blower is provided in plural.   
     
     
         15 . The air purifier of  claim 14 , wherein
 a plurality of blowers is arranged in parallel to each other.