Air purifier

Abstract

The present embodiment may comprise: a housing that have a suction port, a space formed therein, and a discharge port formed in an upper portion thereof; a purification unit and a blowing unit accommodated in the space; a discharge guide that is disposed in an upper portion of the housing and discharges blown air to the discharge port; a tilting mechanism that is connected to the discharge guide to tilt the discharge guide; and a lifting and lowering mechanism that lifts and lowers the tilting mechanism.

1 . An air purifier comprising:
 a housing having a suction port formed therein, a space formed therein, and a discharge port formed in an upper portion thereof;   a purification unit and a blowing unit accommodated in the space;   a discharge guide disposed in an upper portion of the housing to discharge and guide air blown to the discharge port;   a tilting mechanism configured to tilt the discharge guide; and   a lifting mechanism configured to raise and lower the discharge guide.   
     
     
         2 . The air purifier of  claim 1 ,
 wherein the discharge port is opened in the upper portion of the housing in an upper-and-lower direction,   wherein a size of the discharge guide is larger than a size of the discharge port, and   wherein a rim of the discharge guide faces a periphery of the discharge port in the upper-and-lower direction.   
     
     
         3 . The air purifier of  claim 2 , wherein the discharge guide comprises a lower guide surface facing the space and guiding air blown from the discharge port. 
     
     
         4 . The air purifier of  claim 2 , wherein the housing comprises a curved surface formed around the discharge port. 
     
     
         5 . The air purifier of  claim 4 ,
 wherein the housing further comprises a pair of side surfaces extending from the curved surface, and   wherein the pair of side surfaces gradually moves away from each other downward.   
     
     
         6 . The air purifier of  claim 4 , wherein a width of the housing in a left-and-right direction gradually increases downward. 
     
     
         7 . The air purifier of  claim 1 ,
 wherein the housing comprises:   a discharge body having an open bottom and the discharge port formed therein; and   an inlet guide disposed below the discharge body, and   wherein at least one of the discharge body or the inlet guide comprises a hanger connector connected to a support body extending from a hanger unit installed on a ceiling.   
     
     
         8 . The air purifier of  claim 7 ,
 wherein the discharge body comprises:   an upper curved portion in which the discharge port is opened in an upper-and-lower direction and a curved surface is formed around the discharge port;   a left slope portion extending from a lower left end of the upper curved portion; and   a right slope portion extending from a lower right end of the upper curved portion, and   wherein the left slope portion and the right slope portion move away from each other downward.   
     
     
         9 . The air purifier of  claim 1 , wherein the discharge guide comprises:
 a vane having a larger size than a size of the discharge port; and   a connector protruding from a lower surface of the vane and connected to a horizontal shaft of the tilting mechanism to be tilted about the horizontal shaft.   
     
     
         10 . The air purifier of  claim 1 ,
 wherein the tilting mechanism is connected to the discharge guide, and   wherein the lifting mechanism is connected to the tilting mechanism.   
     
     
         11 . The air purifier of  claim 1 , wherein the lifting mechanism comprises:
 a carrier equipped with the tilting mechanism;   a rack formed in the carrier;   a pinion engaged with the rack; and   a lifting motor installed in the housing to rotate the pinion.   
     
     
         12 . The air purifier of  claim 1 , further comprising a lifting guide disposed inside the housing to guide raising and lowering of the tilting mechanism. 
     
     
         13 . The air purifier of  claim 1 , further comprising a controller configured to control the tilting mechanism and the lifting mechanism in a plurality of modes. 
     
     
         14 . The air purifier of  claim 13 , wherein the plurality of modes comprise:
 a pop-up mode in which the discharge guide is raised to a first height; and   a descending airflow mode in which the discharge guide is lowered to a second height lower than the first height,   wherein the second height is a height at which air guided to the discharge guide forms Coanda airflow along a curved surface formed around the discharge port.   
     
     
         15 . The air purifier of  claim 14 ,
 wherein the housing comprises a left curved surface on a right side of the discharge port and a right curved surface on a right side of the discharge port, and   wherein the plurality of modes comprises:   a left concentrated discharge mode in which a distance between a left end of the discharge guide and the left curved surface is longer than a distance between a right end of the discharge guide and the right curved surface; and   a right concentrated discharge mode in which a distance between a right end of the discharge guide and the right curved surface is longer than a distance between a left end of the discharge guide and the left curved surface.   
     
     
         16 . The air purifier of  claim 13 , further comprising a sensor configured to sense a pollution level of a room,
 wherein the controller controls the tilting mechanism and the lifting mechanism so that the discharge guide guides air toward an area where the sensor is located, when a pollution level sensed by the sensor is within a set range.   
     
     
         17 . The air purifier of  claim 16 , wherein the sensor is spaced apart from the housing outside the housing, and
 wherein a plurality of sensors is provided to be spaced apart from each other and each of the plurality of sensors is communicatively connected to the controller.   
     
     
         18 . The air purifier of  claim 16 ,
 wherein the sensor comprises:   a sensing element configured to sense foreign substances;   a sensor PCB configured to process a sensing value of the sensing element; and   a transmission element connected to the sensor PCB to transmit a signal generated by the sensor PCB to an outside,   wherein the controller comprises:   a reception element configured to receive a signal transmitted by the transmission element; and   a purifier PCB connected to the reception element to control the tilting mechanism and the lifting mechanism according to the signal received by the reception element.   
     
     
         19 . An air purifier comprising:
 a discharge body having a discharge port formed at an upper portion thereof and a curved surface formed around the discharge port;   a discharge guide formed with a lower guide surface larger than the discharge port and facing the discharge port and the curved surface and having a rim facing the curved surface in an upper-and-lower direction; and   a lifting mechanism for raising the discharge guide to a first height or lowering the discharge guide to a second height lower than the first height,   wherein the second height is a height at which the lower guide surface is not in contact with the curved surface.   
     
     
         20 . The air purifier of  claim 19 ,
 wherein the discharge body further comprises a pair of side surfaces extending from the curved surface, and   wherein the pair of side surfaces gradually moves away from each other downward.   
     
     
         21 . The air purifier of  claim 19 , comprising an inlet guide guiding air into the discharge body,
 wherein the inlet guide has a left end spaced apart from a left inner surface of the discharge body and a right end spaced apart from a right inner surface of the discharge body.