Indoor unit for air conditioner

Abstract

The indoor unit of the air conditioner includes a centrifugal blower configured to discharge air sucked from an indoor-unit suction port to the periphery, a heat exchanger provided on a discharge side of the centrifugal blower, a blowout port provided on a downstream side of the heat exchanger, and a drain pan provided under the heat exchanger and configured to receive moisture condensation water. The lower end of a discharge port of the centrifugal blower is provided in a position higher than an upper end of a wall surface section of the drain pan located on the upstream side with respect to the heat exchanger. The upper end of the wall surface section located on the upstream side with respect to the heat exchanger is formed lower than an upper end of a wall surface section located on the downstream side with respect to the heat exchanger.

1 . An indoor unit of an air conditioner comprising:
 an indoor-unit suction port that sucks indoor air into the indoor unit;   a centrifugal blower configured to discharge the air sucked from the indoor-unit suction port to a periphery;   a heat exchanger provided on a discharge side of the centrifugal blower and configured to cool or heat the air;   a blowout port provided on a downstream side of the heat exchanger to blow out the air; and   a drain pan provided under the heat exchanger and configured to receive moisture condensation water generated in the heat exchanger,   the drain pan including wall surface sections standing upward respectively from an end portion located on an upstream side with respect to the heat exchanger and an end portion located on the downstream side with respect to the heat exchanger, and   a lower end of a discharge port of the centrifugal blower being provided in a position higher than an upper end of the wall surface section of the drain pan located on the upstream side with respect to the heat exchanger, wherein   in the drain pan, the upper end of the wall surface section located on the upstream side with respect to the heat exchanger is formed lower than an upper end of the wall surface section located on the downstream side with respect to the heat exchanger.   
     
     
         2 . The indoor unit of the air conditioner according to  claim 1 , wherein, in the drain pan, on a bottom surface between the wall surface section located on the upstream side with respect to the heat exchanger and the wall surface section located on the downstream side with respect to the heat exchanger, a dug section dug further downward from the bottom surface is provided. 
     
     
         3 . The indoor unit of the air conditioner according to  claim 2 , wherein the dug section is provided on the upstream side with respect to the heat exchanger. 
     
     
         4 . The indoor unit of the air conditioner according to  claim 2 , further comprising a drain pump for discharging drain water to an outside of the indoor unit, wherein
 a suction port of the drain pump is provided in the dug section.   
     
     
         5 . The indoor unit of the air conditioner according to  claim 1 , further comprising:
 a decorative panel including the indoor-unit suction port in a center and including the blowout port around the indoor-unit suction port; and   a housing connected to the decorative panel, wherein   the centrifugal blower, the heat exchanger, and the drain pan are disposed on an inner side of the housing, and   an electrical component box incorporating a control board for controlling the indoor unit is provided on an outer side of the housing.   
     
     
         6 . The indoor unit of the air conditioner according to  claim 2 , wherein the upper end of the wall surface section of the drain pan located on the upstream side with respect to the heat exchanger is located below a lower end of the heat exchanger. 
     
     
         7 . The indoor unit of the air conditioner according to  claim 1 , thickness of the wall surface section of the drain pan located on the upstream side with respect to the heat exchanger is smaller than thickness of the wall surface section of the drain pan located on the downstream side with respect to the heat exchanger. 
     
     
         8 . The indoor unit of the air conditioner according to  claim 1 , wherein a distance between the wall surface section of the drain pan located on the downstream side with respect to the heat exchanger and the heat exchanger is set larger than a distance between the wall surface section of the drain pan located on the upstream side with respect to the heat exchanger and the heat exchanger.