Indoor unit for air-conditioning apparatus

Abstract

An indoor unit for an air-conditioning apparatus includes a main body attached to an attachment portion, a heat exchanger attached to the main body and configured to exchange heat between air and refrigerant, a fan attached to the main body and configured to send, into a room, air subjected to heat exchange in the heat exchanger, and a front frame attached to the main body by using a screw. The front frame forms a fan casing that accommodates the fan between the front frame and the main body and through which air sent by the fan passes. The fan casing has an air outlet through which air is blown out, between a front air passage wall on a front side of the fan casing and a back air passage wall on a back side of the fan casing. The back air passage wall has, at a downstream terminal end, a recess into which the screw is inserted. The indoor unit further includes a screw cover covering the screw and attached to the recess. The screw cover has a hollow passing through in a laterally extending direction, and a chamber is formed by the hollow being held between side walls located on both sides of the recess in the front frame.

1 . An indoor unit for an air-conditioning apparatus, the indoor unit comprising:
 a main body attached to an attachment portion;   a heat exchanger attached to the main body and configured to exchange heat between air and refrigerant;   a fan attached to the main body and configured to send, into a room, air subjected to heat exchange in the heat exchanger;   a front frame attached to the main body by using a screw, the front frame forming a fan casing that accommodates the fan between the front frame and the main body and through which air sent by the fan passes and an air outlet through which air is blown out, and the back air passage wall on a back side of the fan casing having, at a downstream terminal end, a recess into which the screw is inserted; and   a screw cover covering the screw and attached to the recess,   wherein the screw cover has a hollow passing through in a laterally extending direction, and a chamber is formed by the hollow being held between side walls located on both sides of the recess in the front frame.   
     
     
         2 . The indoor unit for an air-conditioning apparatus of  claim 1 ,
 wherein the screw cover has:
 a bottom face forming part of a bottom of the front frame; 
 an air passage face connected to the bottom face, forming part of the back air passage wall, and receiving air sent by the fan; and 
 a partition wall disposed on a front side relative to the screw and connecting the bottom face and the air passage face to one another, wherein 
 an internal space surrounded by the bottom face, the air passage face and the partition wall is the hollow. 
   
     
     
         3 . The indoor unit for an air-conditioning apparatus of  claim 2 ,
 wherein, in an edge portion of a portion where the recess is formed in the back air passage wall, an air passage wall-side step is formed,   wherein, in an edge portion of the air passage face, an air passage face-side step is formed, and   wherein the air passage face-side step and the air passage wall-side step fit to one another, and the air passage face is attached to the back air passage wall.   
     
     
         4 . The indoor unit for an air-conditioning apparatus of  claim 2 ,
 wherein, in an edge portion of a portion where the recess is formed in the bottom, a bottom-side step is formed,   wherein, in an edge portion of the bottom face, a bottom face-side step is formed, and   wherein the bottom-side step and the bottom face-side step fit to one another, and the bottom face is attached to the bottom.