Indoor unit and refrigeration cycle device

Abstract

An indoor unit includes: a main body having an opening near an air-conditioning target space and attached to an installation section; a panel having an air inlet through which air is suctioned and an air outlet through which the suctioned air is discharged, and covering the opening of the main body; a fan provided to the main body and generating flow of air that is suctioned from the air inlet of the panel and blown out from the air outlet of the panel; a bell mouth provided upstream of the fan in the main body and guiding the air suctioned from the air inlet toward the fan; and an electric component box provided upstream of the bell mouth in the main body, to thereby define an air-flowing space between the electric component box and the bell mouth, and accommodating a control unit that controls operation of the fan.

1 . An indoor unit, comprising:
 a main body that has an opening near an air-conditioning target space and is attached to an installation section;   a panel that has an air inlet through which air is suctioned and an air outlet through which the suctioned air is discharged, and covers the opening of the main body;   a fan provided to the main body and generates flow of air that is suctioned from the air inlet of the panel and blown out from the air outlet of the panel;   a bell mouth provided upstream of the fan in the main body and guides the air suctioned from the air inlet toward the fan; and   an electric component box provided upstream of the bell mouth in the main body, to thereby define an air-flowing space between the electric component box and the bell mouth, and accommodates a control unit that controls operation of the fan,   wherein the fan   generates flow of air such that part of the air suctioned from the air inlet passes through the space and thereafter flows toward the bell mouth.   
     
     
         2 . (canceled) 
     
     
         3 . The indoor unit of  claim 1 , further comprising a flow regulation guide that is provided in the space and guides air entering the space toward the bell mouth. 
     
     
         4 . The indoor unit of  claim 3 , wherein a number of the flow regulation guide
 is one in the space in a circumferential direction about a rotational shaft of the fan.   
     
     
         5 . The indoor unit of  claim 3 , wherein the flow regulation guide
 is provided at an end portion of the space in the circumferential direction about the rotational shaft of the fan.   
     
     
         6 . The indoor unit of  claim 3 , wherein
 the flow regulation guide   includes a pair of side surfaces facing each other in the circumferential direction about the rotational shaft of the fan, and   a distance between the pair of side surfaces is decreased toward the rotational shaft of the fan.   
     
     
         7 . The indoor unit of  claim 6 , wherein the pair of side surfaces of the flow regulation guide
 protrudes toward a direction in which the pair of side surfaces faces each other.   
     
     
         8 . The indoor unit of  claim 1 , wherein an upstream-side end portion and a downstream-side end portion on a side surface of the electric component box have a curved surface, the side surface facing toward the fan, the upstream-side end portion having a radius of curvature larger than that of the downstream-side end portion. 
     
     
         9 . A refrigeration cycle device, comprising the indoor unit of  claim 1 .