Indoor unit for air conditioner

Abstract

An air conditioner indoor unit has a box-shaped body casing 1. A pair of air inlet ports 5 are formed in a front surface of the body casing 1. A pair of air outlet ports 7 are formed on both sides of each of the air inlet ports 5. A pair of air passages 6 are each formed in the body casing 1 and extend from the corresponding air inlet port 5 toward the air outlet ports 7. Turbofans 8 are arranged in the body casing 1 in correspondence with the air inlet ports 5. A pair of heat exchangers 9 are arranged on both sides of each of the turbofans 8 in correspondence with the associated two air outlet ports 7. A drain pan 15 is arranged below the heat exchangers 9 and the turbofans 8. Refrigerant pipes 21 a, 21 b, 21 c, 21 d, which connect the heat exchangers 9 to each other, are received in the drain pan 15.

1 . An air conditioner indoor unit comprising a box-shaped casing, an air inlet port formed in a central portion of a front surface of the casing, a pair of air outlet ports formed on both sides of the front surface of the casing, a pair of air passages formed in the casing and extending from the air inlet port to the air outlet ports, a fan that is arranged upstream from the air passages and corresponds to the air inlet port, a pair of heat exchangers that are arranged downstream from the air passages and correspond to the air outlet ports, and a refrigerant pipe connecting the heat exchangers to each other, the air conditioner indoor unit being characterized by a drain pan arranged below the heat exchangers and the fan, the refrigerant pipe being received in the drain pan. 
   
   
       2 . The air conditioner indoor unit according to  claim 1 , characterized in that the casing has a back plate, the drain pan being formed integrally with the back plate of the casing. 
   
   
       3 . The air conditioner indoor unit according to  claim 1  or  2 , characterized in that a partition plate is arranged between the fan and the drain pan. 
   
   
       4 . The air conditioner indoor unit according to  claim 1 , characterized in that the two heat exchangers each extend across the corresponding one of the air passages and are inclined in mutually different directions. 
   
   
       5 . The air conditioner indoor unit according to  claim 1 , characterized in that positioning members for positioning the heat exchangers are arranged on both sides in the drain pan. 
   
   
       6 . The air conditioner indoor unit according to  claim 1 , characterized in that stepped portions for positioning the heat exchangers are formed in a bottom portion of the drain pan. 
   
   
       7 . The air conditioner indoor unit according to  claim 6 , characterized in that each of the stepped portions of the drain pan is formed by a wide portion corresponding to an upper portion of the drain pan and a narrow portion corresponding to the bottom portion of the drain pan, a heat insulating material being arranged on an outer surface of the narrow portion formed in the bottom portion of the drain pan.