Indoor unit for air conditioner

Abstract

An indoor unit for an air conditioner includes: a blower fan that is arranged in a casing; a heat exchanger that encompasses all air flow directions from the blower fan; a drain pan that is arranged below the heat exchanger; and an antimicrobial unit that is installed on the drain pan and has an antimicrobial agent to sterilize drain water. At least a part of the antimicrobial unit is arranged directly below the heat exchanger. The indoor unit has the antimicrobial agent arranged on the drain pan while a cross-sectional area of an outlet passage is prevented from being reduced.

1 . An indoor unit for an air conditioner comprising:
 a blower fan that is arranged in a casing;   a heat exchanger that encompasses all air flow directions from the blower fan;   a drain pan that is arranged below the heat exchanger; and   an antimicrobial unit that is installed on the drain pan and has an antimicrobial agent to sterilize drain water,   wherein at least a part of the antimicrobial unit is arranged directly below the heat exchanger,   the drain pan has a partition wall that partitions a primary space at an upstream side from a secondary space on a downstream side of an air flow through the heat exchanger above the drain pan,   an opening groove is formed in the partition wall to allow the primary space to communicate with the secondary space, and   the antimicrobial unit is installed in the opening groove formed in the partition wall.   
     
     
         2 . (canceled) 
     
     
         3 . The indoor unit for an air conditioner according to  claim 1  further comprising:
 a drain pump that drains drain water accumulated in the drain pan, 
 wherein the drain pump and the antimicrobial unit are installed in one corner of the casing having a rectangular shape in a planar view. 
 
     
     
         4 . The indoor unit for an air conditioner according to  claim 1 ,
 wherein a bottom face of the opening groove is set to have the same height as that of a bottom face in the primary space and a bottom face in the secondary space of the drain pan.   
     
     
         5 . The indoor unit for an air conditioner according to  claim 1 ,
 wherein the heat exchanger has two bent portions in one corner of the casing having a rectangular shape in a planar view, and   the antimicrobial unit is installed between the two bent portions in a planar view.   
     
     
         6 . The indoor unit for an air conditioner according to  claim 1 ,
 wherein the antimicrobial unit is installed so as to longitudinally, in a planar view, run along an extending direction of the heat exchanger in a planar view.   
     
     
         7 . The indoor unit for an air conditioner according to  claim 1 ,
 wherein a resistive element against air is installed on the antimicrobial unit to fill in a gap between the antimicrobial unit and the heat exchanger.