Indoor unit of air conditioner

Abstract

An indoor unit of an air conditioner, includes a blower fan disposed within a casing; and a heat exchanger for heat-exchanging between refrigerant and air flowing by the blower fan, said heat exchanger connected to a refrigerant inlet pipe for introducing refrigerant and a refrigerant outlet pipe for discharging a refrigerant, wherein the refrigerant inlet pipe is connected to a side of the heat exchanger, where a flow velocity of the air passing through the heat exchanger is relatively high. Accordingly, efficiency of heat exchange between the indoor air and refrigerant can be improved, and thus cooling and heating efficiency of the indoor air is improved, thereby improving performance of the air conditioner. Also, by reducing the operation time of the air conditioner, power consumption can be reduced.

1 . An indoor unit of an air conditioner, comprising: 
 a blower fan disposed within a casing; and    a heat exchanger for heat-exchanging between refrigerant and air flowing by the blower fan, said heat exchanger connected to a refrigerant inlet pipe for introducing refrigerant and a refrigerant outlet pipe for discharging refrigerant,    wherein the refrigerant inlet pipe is connected to a side of the heat exchanger, where a flow velocity of the air passing through the heat exchanger is relatively high.    
     
     
         2 . The indoor unit of  claim 1 , wherein the heat exchanger includes a pair of slabs having therein a tube through which refrigerant passes and disposed to be at a predetermined angle therebetween as ends of the slabs are connected to each other.  
     
     
         3 . The indoor unit of  claim 2 , wherein the refrigerant inlet pipe is connected to each first end of the slabs, where the slabs are connected to each other.  
     
     
         4 . The indoor unit of  claim 3 , wherein the refrigerant outlet pipe is connected to each second end of the slabs, said second end opposite to the first end of the slab.  
     
     
         5 . The indoor unit of  claim 1 , wherein the heat exchanger is an A-coil heat exchanger type having a pair of slabs disposed to be at a predetermined angle as upper ends of the slabs are connected to each other and lower ends of the slabs are apart from each other.  
     
     
         6 . The indoor unit of  claim 5 , wherein the refrigerant inlet pipe is connected to each upper end of the slabs.  
     
     
         7 . The indoor unit of  claim 5 , wherein the refrigerant outlet pipe is connected to each lower end of the slabs.  
     
     
         8 . The indoor unit of  claim 5 , wherein the blower fan is disposed under the heat exchanger.  
     
     
         9 . The indoor unit of  claim 1 , wherein a four way valve connected to the refrigerant inlet pipe and the refrigerant outlet pipe, for circulating refrigerant according to a heating cycle and a cooling cycle is installed.  
     
     
         10 . The indoor unit of  claim 9 , wherein a thermostatic expansion valve (TXV) for controlling a flow of refrigerant according to a temperature of a refrigerant is installed at the refrigerant inlet pipe.