Tube for heat exchanger

Abstract

The object of the invention is, among others, a tube for a heat exchanger, including: a first tubular element and at least one second tubular element each tubular element including two juxtaposed longer walls having essentially flat surface connected by a pair of shorter walls to form a closed profile of each tubular element. The tube further includes at least one reversal element configured to fluidly connect the first tubular element and the second tubular element. The tubular elements are arranged next to each other, so that the respective longer walls are coplanar with respect to each-other. The reversal element is made integral with the tubular elements.

What is claimed is: 
     
         1 . A tube for a heat exchanger, comprising: a first tubular element and at least one second tubular element each tubular element including two juxtaposed longer walls having essentially flat surface connected by a pair of shorter walls to form a closed profile of each tubular element, wherein in that the tube further comprises at least one reversal element configured to fluidly connect the first tubular element and the second tubular element, wherein the tubular elements are arranged next to each other, so that the respective longer walls are coplanar with respect to each-other, wherein the reversal element is made integral with the tubular elements. 
     
     
         2 . The tube according to  claim 1 , wherein the reversal elements include a first twisted section and at least one second twisted section, wherein the first twisted section protrudes directly from first tubular element, and the second twisted section protrudes directly from the second tubular element. 
     
     
         3 . The tube according to  claim 2 , wherein the reversal element includes an essentially U-shaped section configured to fluidly connect the first twisted section and the second twisted section. 
     
     
         4 . The tube according to  claim 2 , wherein the reversal element includes an essentially straight section configured to fluidly connect the first twisted section and the second twisted section. 
     
     
         5 . The tube according to  claim 2 , wherein the second twisted section protrudes helically in one direction, wherein the first twisted section protrudes helically in the same direction as the second twisted section. 
     
     
         6 . The tube according to  claim 2 , wherein the second twisted section protrudes helically in one direction, wherein the first twisted section protrudes helically in different direction than the second twisted section. 
     
     
         7 . The tube according to  claim 1 , wherein the first tubular element forms a first pass for the fluid, the second tubular element includes a second pass for the fluid, wherein the intended fluid flow direction in the second pass is in counterflow with respect to the intended fluid flow in the first pass. 
     
     
         8 . The tube according to  claim 1 , wherein the reversal section includes an essentially the same hydraulic cross-section as any of the first tubular element or the second tubular element. 
     
     
         9 . The tube according to  claim 1 , wherein the tube is an extruded tube and further comprises a plurality of micro channels. 
     
     
         10 . A heat exchanger comprising at least one tube including a first tubular element and at least one second tubular element each tubular element including two juxtaposed longer walls having essentially flat surface connected by a pair of shorter walls to form a closed profile of each tubular element, wherein in that the tube further includes at least one reversal element configured to fluidly connect the first tubular element and the second tubular element, wherein the tubular elements are arranged next to each other, so that the respective longer walls are coplanar with respect to each-other, wherein the reversal element is made integral with the tubular elements, wherein the heat exchanger further comprises: at least one first manifold group configured to receive one end of the tube and a second manifold group configured to receive the other end of the tube bundle, wherein the first manifold group includes at least a first channel fluidly connected with the first tubular elements, so that a fluidal communication between at least two tube bundles is provided, and in that the second manifold group includes a second channel fluidly communicated with at least second tubular elements, wherein the manifold groups are arranged next to each-other. 
     
     
         11 . The heat exchanger according to  claim 10 , wherein the first and the second manifold groups include a header plate including slots for receiving the tubes, a distribution plate configured to form the first and the second channel in the manifold groups, and the tank plate for closure of the manifold groups. 
     
     
         12 . The heat exchanger according to  claim 11 , wherein the header plate includes a plurality of teeth configured to fix the distribution plate and the tank plate. 
     
     
         13 . The heat exchanger according to  claim 10 , wherein the tube includes a third tubular element and a fourth tubular element, wherein the third and fourth tubular elements are fluidly connected by corresponding reversal elements.