Cooling system for vehicle

Abstract

An air-conditioning system for a vehicle may include a cooling unit including a radiator, a cooling fan to introduce air in the radiator, a water pump connected to the radiator through the cooling line, and a reserver tank provided on the cooling line to store a cooling fluid, a first condenser connected to the cooling line between the radiator and the reserver tank such that a cooling fluid is introduced and a refrigerant is introduced through a refrigerant line, and the refrigerant is condensed by heat exchange between the cooling fluid and the refrigerant, and a second condenser serially connected to the first condenser on the refrigerant line such that a condensed liquid phase refrigerant is introduced, and disposed on a front of the radiator such that the refrigerant is condensed by an air cooling type through heat exchange between the refrigerant and an outdoor air introduced on driving.

What is claimed is: 
     
         1 . An air-conditioning system for a vehicle, comprising:
 a cooling unit including a cooling fan to introduce air in a radiator, a reserver tank connected to the radiator through a cooling line to store a cooling fluid, and a water pump to circulate the cooling fluid;   a first condenser connected to the cooling line between the radiator and the reserver tank wherein a refrigerant is introduced thereto through a refrigerant line and the refrigerant is condensed by heat exchange between the cooling fluid and the refrigerant; and   a second condenser serially connected to the first condenser on the refrigerant line such that a condensed liquid refrigerant is introduced from the first condenser, and the refrigerant is condensed by heat exchange between the refrigerant and an outdoor air introduced on driving by being disposed on a front of the radiator.   
     
     
         2 . The air-conditioning system of  claim 1 ,
 wherein an air-conditioning unit including an expansion valve to expand a condensed refrigerant, an evaporator to evaporate an expanded refrigerant by heat exchange with the air, and a compressor to compress the refrigerant of an evaporated gas state, which are connected to each other through the refrigerant line, and   wherein the compressed refrigerant discharged from the compressor is sequentially passed and condensed in each of the first condenser and the second condenser connected to each other through the refrigerant line.   
     
     
         3 . The air-conditioning system of  claim 1 , wherein the first condenser is integrally formed with a receiver drier to separate a remaining gaseous refrigerant in the condensed refrigerant, after the refrigerant connected and introduced through the compressor and the refrigerant line is condensed. 
     
     
         4 . The air-conditioning system of  claim 3 , wherein the first condenser is serially connected to the second condenser through the receiver drier. 
     
     
         5 . The air-conditioning system of  claim 1 , wherein a heating element is disposed between the water pump and the radiator, in which the cooling fluid that has been passed the first condenser connected through the cooling line is introduced. 
     
     
         6 . The air-conditioning system of  claim 5 , wherein the heating element includes an electric power part, a motor, or a stack in an environmentally-friendly vehicle and a water cooling type intercooler in an internal combustion engine vehicle. 
     
     
         7 . An air-conditioning system for a vehicle, which includes an expansion valve to expand a liquid refrigerant, an evaporator to evaporate an expanded refrigerant by heat exchange with air, and a compressor to compress a gaseous refrigerant supplied from the evaporator, which are connected to each other through a refrigerant line, comprising:
 a cooling unit including a cooling fan to introduce air in a first radiator, a reserver tank connected to the first radiator through a cooling line to store a cooling fluid, and a water pump connected through the cooling line to circulate the cooling fluid;   a first condenser disposed on one side of the first radiator such that the cooling fluid is introduced through the cooling line and the cooling unit, and the refrigerant is condensed by a water cooling type through heat exchange between the cooling fluid and the refrigerant introduced through the cooling line; and   a second condenser serially connected to the first condenser on the refrigerant line such that a condensed liquid phase refrigerant is introduced, and disposed on a front of the first radiator such that the refrigerant is condensed by an air cooling type through heat exchange between the refrigerant and an outdoor air introduced on driving.   
     
     
         8 . The air-conditioning system of  claim 7 , wherein the first condenser is disposed between the first radiator and the reserver tank. 
     
     
         9 . The air-conditioning system of  claim 7 , wherein the first condenser is integrally formed with a receiver drier to separate a remaining gaseous refrigerant in the condensed refrigerant. 
     
     
         10 . The air-conditioning system of  claim 9 , wherein the first condenser is connected to the second condenser through the receiver drier. 
     
     
         11 . The air-conditioning system of  claim 7 , wherein a heating element is disposed between the first radiator and the water pump through the cooling line. 
     
     
         12 . The air-conditioning system of  claim 11 , wherein the heating element includes an electric power part, a motor, or a stack in an environmentally-friendly vehicle and a water cooling type intercooler in an internal combustion engine vehicle. 
     
     
         13 . The air-conditioning system of  claim 7 , wherein a second radiator for an internal combustion engine is provided between the first radiator and the cooling fan to cool the internal combustion engine in an internal combustion engine vehicle.