Evaporator

Abstract

An evaporator ( 1 ) having: a plurality of vertical tubes ( 2 ) having a refrigerant path ( 7, 8 ) therein; an upper tank ( 10, 11 ) communicating upper ends of the refrigerant paths ( 7, 8 ) in the plural tubes ( 2 ); a lower tank ( 12, 13 ) communicating lower ends of the refrigerant paths ( 7, 8 ) in the plural tubes ( 2 ); and a resistance generators ( 21 ) provided in vicinity of inlets of the refrigerant paths ( 7, 8 ) and applying resistance to refrigerant flowing from the upper tank ( 10, 11 ) or the lower tank ( 12, 13 ) into the refrigerant paths ( 7, 8 ).

1 . An evaporator comprising:
 a plurality of vertical tubes having a refrigerant path therein;   an upper tank communicating upper ends of the refrigerant paths in the plural tubes;   a lower tank communicating lower ends of the refrigerant paths in the plural tubes; and   resistance generators provided in vicinity of inlets of the refrigerant paths and applying resistance to refrigerant flowing from the tank into the refrigerant paths.   
   
   
       2 . The evaporator according to  claim 1 , wherein
 the plurality of tubes include upflow-type tubes in which refrigerant flows upward from the lower tank to the upper tank, and   the resistance generators are provided in vicinity of the inlets of the refrigerant paths in the upflow-type tubes.   
   
   
       3 . The evaporator according to  claim 1 , wherein
 the tubes are formed with the resistance generators on their inlet side.   
   
   
       4 . The evaporator according to  claim 1 , further comprising
 inner fins provided in the tubes,   wherein the resistance generators are formed on the inner fins at their inlet side.   
   
   
       5 . The evaporator according to  claim 1 , wherein
 each of the tubes is a plate-to-plate type tube formed by combining a pair of plate-like tube members.