Indoor unit for air conditioner

Abstract

An indoor unit for an air conditioner may include a case having an intake hole and a discharge hole at a lower portion of the case; a dust sensor module including a dust sensor configured to sense a density of dust in an interior space and a sensor case configured to accommodate the dust sensor therein; and a cover assembly on which the dust sensor module is configured to be installed and which is configured to be coupled to the case. The sensor case may include a first sensor case including a first hole and a first coupling portion, and a second sensor case including a second hole and a second coupling portion. The dust sensor module may be fastened to the cover assembly by a fastener that passes through the first hole or the second hole.

What is claimed is: 
     
         1 . An indoor unit for an air conditioner, comprising:
 a case having an intake hole and a discharge hole at a lower portion of the case;   a dust sensor module including a dust sensor configured to sense a density of dust in an interior space in which the indoor unit is located and a sensor case configured to accommodate the dust sensor therein; and   a cover assembly on which the dust sensor module is configured to be installed and which is configured to be coupled to the case, wherein the sensor case includes:
 a first sensor case including a first hole and a first coupling portion; and 
 a second sensor case including a second hole and a second coupling portion, and wherein the dust sensor module is fastened to the cover assembly by a fastener that passes through the first hole or the second hole. 
   
     
     
         2 . The indoor unit of  claim 1 , wherein when the dust sensor module is fastened to the cover assembly by a fastener that passes through the first hole, the second coupling portion is coupled to a coupling member of the cover assembly, and when the dust sensor module is fastened to the cover assembly by a fastener that passes through the second hole, the first coupling portion is coupled to the coupling member of the cover assembly. 
     
     
         3 . The indoor unit of  claim 1 , wherein the case includes a bottom surface on which the intake hole is formed and a circumferential surface that extends from the bottom surface and exposed to the interior space, wherein the cover assembly is coupled to the circumferential surface, and wherein the dust sensor module is installed on an inner surface of the cover assembly. 
     
     
         4 . The indoor unit of  claim 1 , wherein the case includes a circular front panel on which the intake hole is formed. 
     
     
         5 . The indoor unit of  claim 1 , wherein the case includes a front panel on which the intake hole is formed, wherein the cover assembly is disposed radially outside of the front panel such that a surface thereof is exposed to the interior space, and wherein the dust sensor module is installed on an inner surface of the cover assembly. 
     
     
         6 . The indoor unit of  claim 1 , wherein the first sensor case includes a body and a fixing portion that protrudes from a surface of the body, wherein the first hole is disposed on a top of the fixing portion of the first sensor case, and wherein the first coupling portion is disposed on a side of the fixing portion of the first sensor case. 
     
     
         7 . The indoor unit of  claim 6 , wherein the fixing portion of the first sensor case protrudes from a lower end of the body, and wherein a plurality of hook coupling portion coupled to the second sensor case is formed on an upper end and both sides of the body. 
     
     
         8 . The indoor unit of  claim 1 , wherein the second sensor case includes a body and a fixing portion that protrudes from a surface of the body, and wherein the second hole and the second coupling portion are disposed on a top of the fixing portion of the second sensor case. 
     
     
         9 . The indoor unit of  claim 8 , wherein the fixing portion of the second sensor case includes a first section and a second section adjacent to the first section and having a second height smaller than a height of the first section. 
     
     
         10 . The indoor unit of  claim 9 , wherein the second hole is disposed on a top of the first section, and wherein and the second coupling portion is disposed on a top of the second section. 
     
     
         11 . The indoor unit of  claim 10 , wherein a bottom of the first section is inclined or curved. 
     
     
         12 . The indoor unit of  claim 8 , wherein the fixing portion of the second sensor case protrudes from a lower end of the body of the second sensor case, and wherein a plurality of hooks configured to be coupled to the first sensor case is formed on an upper end and both sides of the body of the second sensor case. 
     
     
         13 . The indoor unit of  claim 1 , wherein at least one indoor air intake portion and an indoor air discharge portion are formed on a surface of the dust sensor module. 
     
     
         14 . The indoor unit of  claim 13 , wherein the at least one indoor air intake portion includes a plurality of indoor air intake portions. 
     
     
         15 . The indoor unit of  claim 13 , wherein the first hole and the first coupling portion are disposed at a first side of the at least one indoor air intake portion and the indoor air discharge portion, and wherein the second hole and the second coupling portion are disposed at a second side of the at least one indoor air intake portion and the indoor air discharge portion. 
     
     
         16 . An indoor unit for an air conditioner, comprising:
 a case having an intake hole and a discharge hole at a lower portion of the case;   a dust sensor module including a dust sensor configured to sense a density of dust in an interior space in which the indoor unit is located and a sensor case configured to accommodate the dust sensor therein; and   a cover assembly on which the dust sensor module is configured to be installed and which is configured to be coupled to the case, wherein the sensor case includes:
 a first sensor case including a first hole and a first coupling portion; and 
 a second sensor case including a second hole and a second coupling portion, wherein the first sensor case and the second sensor case are coupled together to form the sensor case, wherein the first hole and first coupling portion and the second hole and second coupling portion are disposed on opposite sides of the sensor case when the first sensor case and the second sensor case are coupled, and wherein when the dust sensor module is fastened to the cover assembly by a fastener that passes through the first hole, the second coupling portion is coupled to a coupling member of the cover assembly, and when the dust sensor module is fastened to the cover assembly by a fastener that passes through the second hole, the first coupling portion is coupled to the coupling member of the cover assembly. 
   
     
     
         17 . The indoor unit of  claim 16 , wherein the case includes a bottom surface on which the intake hole is formed and a circumferential surface that extends from the bottom surface and exposed to the interior space, wherein the cover assembly is coupled to the circumferential surface, and wherein the dust sensor module is installed on an inner surface of the cover assembly. 
     
     
         18 . The indoor unit of  claim 16 , wherein the case includes a front panel on which the intake hole is formed, wherein the cover assembly is disposed radially outside of the front panel such that a surface thereof is exposed to the interior space, and wherein the dust sensor module is installed on an inner surface of the cover assembly. 
     
     
         19 . The indoor unit of  claim 16 , wherein at least one indoor air intake portion and an indoor air discharge portion are formed on a surface of the dust sensor module. 
     
     
         20 . The indoor unit of  claim 19 , wherein the first hole and the first coupling portion are disposed at a first side of the at least one indoor air intake portion and the indoor air discharge portion, and wherein the second hole and the second coupling portion are disposed at a second side of the at least one indoor air intake portion and the indoor air discharge portion.