Heat exchanger

Abstract

A heat exchanger having a heat exchanger core having at least two rows of tube and fin blocks, each tube and fin block contains an assembly of tubes and fins, wherein the tubes are aligned parallel to each other while the fins are located between adjacent tubes, each tube having a first tube end and a second tube end, each tube and fin block of the first tube and fin block and the second tube and fin block having a manifold tube, the manifold tubes having a row of openings for a fluid tight connection with tubes of a tube and fin block, wherein the first tube ends of the first tube and fin block are fluid tight connected to the openings of a first manifold and the first tube ends of the second tube and fin block are fluid tight connected to the openings of a second manifold.

What is claimed is: 
     
         1 . A heat exchanger comprising:
 a heat exchanger core having at least two rows of tube and fin blocks, a first tube and fin block and a second tube and fin block, each tube and fin block contains an assembly of tubes and fins, wherein the tubes are aligned parallel to each other and the fins are located between adjacent tubes, each tube having a first tube end and a second tube end, each tube and fin block of the first tube and fin block and the second tube and fin block having a manifold tube, the manifold tubes having a row of openings for a fluid tight connection with tubes of a tube and fin block, wherein the first tube ends of the tubes of the first tube and fin block are fluid tight connected to the openings of a first manifold and the first tube ends of the tubes of the second tube and fin block are fluid tight connected to the openings of a second manifold; and   a connecting element, wherein the second tube ends of the tubes of the first tube and fin block and the second tube ends of the tubes of the second tube and fin block are fluid tight connected pairwise via the connecting element.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein each second tube end of the tubes of the first tube and fin block is fluid tight connected to a second tube end of the tubes of the second tube and fin block via the connecting element. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the connecting element is an arch shaped connecting element having at least one arch shaped fluid connecting channel or a plurality of arch shaped fluid connecting channels. 
     
     
         4 . The heat exchanger according to  claim 3 , wherein the connecting element provides a first inlet opening for a first-second tube end and a second inlet opening for a second-second tube end, and wherein the at least one fluid connecting channel or the plurality of fluid connecting channels for fluid connecting the first opening with the second opening, respectively for fluid connecting the first-second tube end with the second-second tube end. 
     
     
         5 . The heat exchanger according to  claim 4 , wherein the connecting element provides a first cavity between the first inlet opening and the at least one fluid connecting channel or the plurality of fluid connecting channels and a second cavity between the second inlet opening and the at least one fluid connecting channel or the plurality of fluid connecting channels. 
     
     
         6 . The heat exchanger according to  claim 4 , wherein the connecting element is made of a pair of plates that are located adjacent to each other and which are connected to each other providing the two openings and the at least on fluid connecting channel. 
     
     
         7 . The heat exchanger according to  claim 6 , wherein the plates have a profile forming the openings and the at least one fluid connecting channel or the fluid connecting channels. 
     
     
         8 . The heat exchanger according to  claim 7 , wherein the plates are stamped metal plates. 
     
     
         9 . The heat exchanger according to  claim 6 , wherein an assembly is provided for the assembly of the two plates of a pair of plates as a pre-assembled unit. 
     
     
         10 . The heat exchanger according to  claim 9 , wherein the assembly is rivets, screws and/or tox elements. 
     
     
         11 . The heat exchanger according to  claim 1 , wherein the heat exchanger is an evaporator.