Indoor unit for air-conditioning apparatus and air-conditioning apparatus including the indoor unit

Abstract

An indoor unit for air-conditioning that may suppress the discharge of dewdrops into a conditioned space. An indoor unit including a casing having an air inlet in an upper portion thereof and an air outlet in a lower portion of a front face thereof, a fan, a heat exchange, and a louver configured to redirect air blown out of the air outlet in a vertical direction. The louver includes a main louver and a sub-louver. In a state where the main louver is level, the sub-louver is provided below the main louver. A leeward end of the sub-louver is positioned forward by a first predetermined distance with respect to a virtual perpendicular line passing through a windward end of the main louver. A windward end of the sub-louver is positioned rearward by a second predetermined distance with respect to the virtual perpendicular line.

1 . An indoor unit for an air-conditioning apparatus, comprising:
 a casing having an air inlet in an upper portion thereof and an air outlet in a lower portion of a front face thereof;   an air-sending device provided in the casing and configured to suction air into the casing via the air inlet and to blow the air out of the casing via the air outlet;   a heat exchanger provided in the casing and configured to exchange heat between the air suctioned into the casing and a refrigerant; and   a louver provided at the air outlet and configured to redirect the air blown out of the air outlet in a vertical direction, wherein   the louver includes a main louver and a sub-louver that each have a plate shape and are each configured to rotate around a rotational axis extending in a lateral direction of the casing, and   in a state where a virtual line connecting a leeward end and a windward end of the main louver is level,   the sub-louver is provided below the main louver;   a leeward end of the sub-louver is positioned forward by a first predetermined distance with respect to a virtual perpendicular line passing through the windward end of the main louver; and   a windward end of the sub-louver is positioned rearward by a second predetermined distance with respect to the virtual perpendicular line.   
     
     
         2 . The indoor unit for an air-conditioning apparatus of  claim 1 , wherein
 the air-sending device includes a plurality of axial-flow or mixed-flow fans that are provided in parallel on a downstream side of the air inlet, and   the heat exchanger is provided on the downstream side of the plurality of fans.   
     
     
         3 . The indoor unit for an air-conditioning apparatus of  claim 1 , wherein the sub-louver has a smaller width than the main louver in side sectional view. 
     
     
         4 . The indoor unit for an air-conditioning apparatus of  claim 1 ,
 wherein, in a state where the sub-louver is provided such that a virtual line connecting the leeward end and the windward end thereof is level, a lower edge of the air outlet is positioned forward by a third predetermined distance with respect to the windward end of the sub-louver.   
     
     
         5 . The indoor unit for an air-conditioning apparatus of  claim 1 , further comprising a straightening vane provided at an upper edge of the air outlet. 
     
     
         6 . The indoor unit for an air-conditioning apparatus of  claim 1 , wherein the main louver and the sub-louver are configured to rotate around a common rotational axis, and
 when the main louver and the sub-louver are rotated about the rotational axis, the windward end of the sub-louver comes into contact with an upper edge of the air outlet and the main louver and the sub-louver cover the air outlet.   
     
     
         7 . The indoor unit for an air-conditioning apparatus of  claim 6 , further comprising a stopper that is a projection provided on the upper edge of the air outlet,
 wherein the windward end of the sub-louver is configured to come into contact with the stopper.   
     
     
         8 . An air-conditioning apparatus comprising the indoor unit for an air-conditioning apparatus of  claim 1 .