Indoor unit of air-conditioning apparatus, and air-conditioning apparatus including the indoor unit

Abstract

An indoor unit of an air-conditioning apparatus includes a suction grille having an air inlet through which air flows in, a decorative panel to which the suction grille is mounted and having an air outlet through which the air flows out, a casing to which the decorative panel is mounted and defining an air passage between the air inlet and the air outlet, a fan located to face the suction grille in the casing and configured to cause the air to flow in through the air inlet and flow out through the air outlet, a heat exchanger located in the air passage between the fan and the air outlet in the casing and configured to exchange heat between refrigerant flowing in the heat exchanger and the air, and a refrigerant detection sensor configured to detect leakage of the refrigerant.

1 . An indoor unit of an air-conditioning apparatus, the indoor unit comprising:
 a suction grille having an air inlet through which air flows in;   a decorative panel to which the suction grille is mounted and having an air outlet through which the air flows out;   a casing to which the decorative panel is mounted and defining an air passage between the air inlet and the air outlet;   a fan located to face the suction grille in the casing and configured to cause the air to flow in through the air inlet and flow out through the air outlet;   a heat exchanger located in the air passage between the fan and the air outlet in the casing and configured to exchange heat between refrigerant flowing in the heat exchanger and the air;   a refrigerant detection sensor configured to detect leakage of the refrigerant,   a sensor holder shaped in a box shape and containing the refrigerant detection sensor, the sensor holder being configured to secure the refrigerant detection sensor in the casing; and   a temperature sensor located in the sensor holder and configured to detect a temperature of the air flowing in through the air inlet,   the suction grille being located below the heat exchanger,   the refrigerant detection sensor being located below the heat exchanger and between the suction grille and the fan,   the sensor holder including a first housing portion housing the refrigerant detection sensor, and a second housing portion housing the temperature sensor,   a partition separating a space in the first housing portion from a space in the second housing portion.   
     
     
         2 . The indoor unit of an air-conditioning apparatus of  claim 1 , wherein a detection unit of the refrigerant detection sensor is directed perpendicularly to a flow of the air flowing from the air inlet toward the fan. 
     
     
         3 . (canceled) 
     
     
         4 . The indoor unit of an air-conditioning apparatus of  claim 1 , wherein the sensor holder is located between the suction grille and the fan. 
     
     
         5 . The indoor unit of an air-conditioning apparatus of  claim 1 , the indoor unit further comprising
 an electric component box containing a controller configured to control the indoor unit of an air-conditioning apparatus,   the sensor holder being secured to a side wall of the electric component box.   
     
     
         6 . The indoor unit of an air-conditioning apparatus of  claim 1 , wherein a plurality of through holes are opened in the sensor holder to face the refrigerant detection sensor, and
 a width between walls of the sensor holder separating the plurality of through holes from one another is smaller than a thickness of a human finger.   
     
     
         7 - 8 . (canceled) 
     
     
         9 . The indoor unit of an air-conditioning apparatus of  claim 1 , wherein the casing is to be located in a ceiling. 
     
     
         10 . An air-conditioning apparatus, comprising
 the indoor unit of an air-conditioning apparatus of  claim 1 .