Indoor unit of air conditioner

Abstract

An indoor unit of an air conditioner includes multiple blow ports and multiple louvers each provided at the blow ports and configured to adjust a blowing direction. Each louver is, upon stop of the indoor unit, rotated in the direction of closing the blow port, the angle of the louver upon stop of the indoor unit being a fully-closed angle. When the minimum angle among louver angles settable by the remote controller is taken as a first angle and the maximum angle is taken as a second angle, the louver angles of a part of the multiple blow ports are, under a preset predetermined operation condition, set to a third angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle, and the louvers of the other blow ports perform louver operation settable from a remote controller.

1 . An indoor unit of an air conditioner, comprising:
 multiple blow ports; and   multiple louvers each provided at each of the blow ports and configured to adjust a blowing direction,   wherein each louver is, upon stop of the indoor unit, rotated in a direction of closing the blow port, an angle of the each louver rotated in the direction of closing the blow port upon stop of the indoor unit being a fully-closed angle,   a remote controller configured to set operation of each louver upon operation of the indoor unit is provided, and   when a minimum angle among louver angles settable by the remote controller is taken as a first angle and a maximum angle is taken as a second angle,
 louver angles of a part of the multiple blow ports are, under a preset predetermined operation condition, set to a third angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle, and the louvers of the other blow ports perform louver operation settable from the remote controller. 
   
     
     
         2 . The indoor unit of the air conditioner according to  claim 1 , wherein
 under the predetermined operation condition, the louver angles of a part of the multiple louvers are held at the fully-closed angle for a predetermined time, and are subsequently controlled to the third angle.   
     
     
         3 . The indoor unit of the air conditioner according to  claim 1 , wherein
 when the fully-closed angle as the louver angle upon stop of the indoor unit is 0 degree, the first angle is set to an optional angle within a range of 27 to 30 degrees, the second angle is set to an optional angle within a range of 60 to 70 degrees, and the third angle is further set to an optional angle within a range of 5 to 25 degrees.   
     
     
         4 . The indoor unit of the air conditioner according to  claim 1 , wherein
 the blow ports are provided at four spots to surround a suction port at a center of the indoor unit, and   the louvers set to the third angle are sequentially switched in every predetermined time.   
     
     
         5 . The indoor unit of the air conditioner according to  claim 1 , wherein
 the predetermined operation condition is heating operation.   
     
     
         6 . The indoor unit of the air conditioner according to  claim 1 , wherein
 the predetermined operation condition is a case where operation is performed under a high-load operation condition where a temperature difference between an external air temperature and a room temperature is equal to or greater than a preset predetermined temperature difference.   
     
     
         7 . The indoor unit of the air conditioner according to  claim 1 , wherein
 the predetermined operation condition is a case where high-speed blowing has been set.   
     
     
         8 . The indoor unit of the air conditioner according to  claim 1 , wherein
 the predetermined operation condition is a case where stirring operation for increasing a blown wind velocity to decrease a temperature difference between upper and lower portions in a room is performed.   
     
     
         9 . An indoor unit of an air conditioner, comprising:
 multiple blow ports; and   multiple louvers each provided at each of the blow ports and configured to adjust a blowing direction,   wherein each louver is, upon stop of the indoor unit, rotated in a direction of closing the blow port, an angle of the each louver rotated in the direction of closing the blow port upon stop of the indoor unit being a fully-closed angle,   a function of automatically swinging each louver upon operation of the indoor unit is provided, and   when a minimum angle of each louver upon automatic swing is taken as a first angle and a maximum angle is taken as a second angle,
 louver angles of a part of the multiple blow ports are, under a preset predetermined operation condition, set to a third angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle, and the louvers of the other blow ports are set to the auto swing or an optional angle. 
   
     
     
         10 . The indoor unit of the air conditioner according to  claim 9 , wherein
 a remote controller configured to set operation of each louver upon operation of the indoor unit is provided, and   the first angle is a minimum angle among louver angles settable by the remote controller.