Evaporator

Abstract

An evaporator has at least one core. The core has tubes and a pair of tanks. The tube is configured to internally pass coolant, each of the tubes formed by bending a plate material and joining both edges of the bent plate material to each other. The pair of header tanks is connected to and communicating with each open end of the tubes. In the most windward core, the jointed edge of the tubes is arranged on the windward side.

What is claimed is:  
     
         1 . An evaporator comprising: 
 a core;    tubes configured to internally pass a coolant therethrough, each of the tubes formed by a bent plate material and in which edges of the bent plate material are joined to each other; and    a pair of header tanks connected to and communicating with open ends of the tubes,    wherein the joined edges of the tubes are oriented windward.    
     
     
         2 . An evaporator comprising: 
 a plurality of cores in which a core located at a position closest to windward includes:    tubes configured to internally pass coolant, each of the tubes formed by bending a plate material and joining both edges of the bent plate material to each other; and    a pair of header tanks connected to and communicating with each open end of the tubes,    wherein the joined edges of the tubes being oriented windward.    
     
     
         3 . An evaporator comprising: 
 a plurality of cores, each of said cores comprising:    tubes configured to internally pass a coolant therethrough, each of the tubes formed by a bent plate material and in which edges of the bent plate material are joined to each other; and    a pair of header tanks connected to and communicating with open ends of the tubes,    wherein the joined edges of the tubes are oriented in a windward direction with a core thereof located in a position closest to windward.    
     
     
         4 . The evaporator of  claim 3 , further comprising: 
 outer fins alternating with the tubes, wherein    a windward end face of each of the tubes is substantially aligned with a windward end face of each of the outer fins in the core located to the closest windward position.    
     
     
         5 . The evaporator of  claim 3 , further comprising: 
 outer fins alternating with the tubes,    wherein the outer fins are extended along the tubes through the cores.    
     
     
         6 . The evaporator of  claim 3 , wherein: 
 the joined edge of the tubes of in the core located closest to windward are oriented windward; and    the joined edges of the tubes of the core located closest to leeward are oriented leeward.    
     
     
         7 . The evaporator of  claim 3 , further comprising: 
 an inner fin arranged in each of the tubes, a material thickness of the inner fin being thinner than a material thickness of the tube.    
     
     
         8 . The evaporator of  claim 7 , wherein the inner fin comprises: 
 first parallel sections substantially parallel to and connected to a first side wall of the tube;    second parallel sections substantially parallel to and connected to a second side wall of the tube; and    orthogonal sections substantially orthogonal to the first and second side walls of the tube and linking the first and second parallel sections with each other.