Heat exchanger

Abstract

The present invention relates to a heat exchanger in which, in order to cool a vehicle engine or motor and to cool air conditioning refrigerant, a plurality of radiators and condensers are integrally configured. By the present invention, through a structure of a header tank, which overcomes the limitation to the degree of freedom in design, the limitation being caused by the aluminum material from which a heat exchanging part and the header tank are made, interference of an inlet-outlet port configured at a header tank can be avoided.

1 . A heat exchanger,
 wherein a plurality of tubes are disposed in two columns front and back and after to form a tube column, and a tube column of the front, which is an introduction direction of cooling air, is formed as a front core, and a tube column of the back, which is a discharge direction of the cooling air, is formed as a back core,   an upper portion of the front core forms a first heat exchanging part in which a heat exchanger medium circulates, a lower portion of the front core forms a second heat exchanging part in which the heat exchange medium circulates, and the back core forms a third heat exchanging part in which the heat exchange medium circulates,   a first header tank is connected to both ends of the first heat exchanging part, a second header tank is connected to both ends of the second heat exchanging part, and a third header tank is connected to both ends of the third heat exchanging part, and   in the first header tank, the second header tank, and the third header tank, one side of the first header tank is formed to have a larger length protruding from a heat exchanger in a longitudinal direction than the third header tank.   
     
     
         2 . The heat exchanger of  claim 1 , wherein the first header tank, the second header tank, and the third header tank each has inlet and outlet ports for introduction and discharge of the heat exchange medium, an outlet port and an inlet port of the first header tank are formed on the first header tank connected to one end of the first heat exchanging part, and an outlet port and an inlet port of the third header tank are each formed on the third header tank connected to both ends of the third heat exchanging part, and
 the first header tank inlet and outlet ports and the third header tank inlet and outlet ports extend rearward.   
     
     
         3 . The heat exchanger of  claim 2 , wherein the first header tank outlet port is disposed at an upper side of the first header tank connected to one end of the first heat exchanging part, and the first header tank inlet port is disposed at a lower side of the first header tank connected to the one end of the first heat exchanging part. 
     
     
         4 . The heat exchanger of  claim 2 , wherein among the third header tanks connected to both ends of the third heat exchanging part, the third header tank outlet port is disposed at an upper side of the third header tank connected to one end of the third heat exchanging part, and the third header tank inlet port is disposed at a lower side of the third header tank connected to the other end of the third heat exchanging part. 
     
     
         5 . The heat exchanger of  claim 2 , wherein in the second header tank connected to one end of the second heat exchanging part, the second header tank outlet port and inlet port are disposed on a lower portion thereof and are open in the longitudinal direction. 
     
     
         6 . The heat exchanger of  claim 2 , wherein an avoidance part that is concave in the longitudinal direction is formed in the third header tank. 
     
     
         7 . The heat exchanger of  claim 6 , wherein the first header tank inlet port and outlet port are not interfered with the third header tank by the avoidance part. 
     
     
         8 . The heat exchanger of  claim 1 , wherein the front and back cores, the first to third heat exchanging parts, and the first to third header tanks are made of an aluminum material and bonded by brazing. 
     
     
         9 . The heat exchanger of  claim 2 , wherein the front core has an upper portion configured as a low-temperature radiator and a lower portion configured as a condenser having a subcool area, and the back core is configured as a high-temperature radiator. 
     
     
         10 . The heat exchanger of  claim 9 , wherein the condenser having the subcool area constituting the lower portion of the front core is connected to a separate sub heat exchanger including a condenser having a condensation area and a receiver dryer. 
     
     
         11 . The heat exchanger of  claim 1 , wherein the front core has an upper portion configured as a low-temperature radiator and a lower portion configured as a condenser having a subcool area, and the back core is configured as a condenser having a condensation area. 
     
     
         12 . The heat exchanger of  claim 11 , further comprising the condenser having the condensation area, which constitutes the back core, and the condenser having the subcool area and the receiver dryer, which constitute the lower portion of the front core.