A heat exchanger

Abstract

A heat exchanger includes a stack of heat exchanger plates, a first set of channels, and a second set of channels, in each of the channels in the respective set of channels fin structures are positioned between the heat exchanger plates, each heat exchanger plate comprises a first inlet port, a first outlet port, a second inlet port and a second outlet port formed at a respective corner portion of the respective heat exchanger plate and extending through the stack, the heat exchanger further comprises a distribution structure at the respective inlet port and a collection structure at the respective outlet port, the distribution structure, respectively the collection structure is positioned between the port and the respective fin structure, a port interface between the inlet port and the distribution structure, respectively a port interface between the outlet port and the collection structure is inclined relative to the fin direction.

1 . A heat exchanger comprising a stack of heat exchanger plates stacked one on top of the other along a stacking direction
 a first set of channels formed in every first second interspace between the heat exchanger plates,   a second set of channels formed in every second second-interspace between the heat exchanger plates,   wherein, in each of the channels in the first and second set of channels fin structures formed of sheets being folded back and forth are positioned between the heat exchanger plates such that the respective fin structure abuts the heat exchanger plates along a plurality of contact lines having a main extension extending in parallel with a longitudinally extending fin direction thereby defining plurality of fluid channels forming said first and second set of channels,   wherein each heat exchanger plate comprises four through-going openings formed at a respective corner portion of the respective heat exchanger plate and configured to form a first inlet port extending through the stack along the stacking direction a first outlet port extending through the stack along the stacking direction a second inlet port extending through the stack along the stacking direction and a second outlet port extending through the stack along the stacking direction the first inlet port and first outlet port being in fluid connection with each other via the first set of channels and the second inlet port and second outlet port being in fluid connection with each other via the second set of channels,   wherein the heat exchanger further comprises, in each interspace between the heat exchanger plates, a distribution structure at the respective inlet port and a collection structure at the respective outlet port,   wherein the respective distribution structure respectively the respective collection structure is positioned between the respective port, and the respective fin structure in the respective first and second set of channels,   wherein a port interface between the respective inlet port and the respective distribution structure respectively a port interface between the respective outlet port and the collection structure is inclined relative to the fin direction such that a distance between the port interface and the fin structure as measured along the fin direction increases with increasing distance, as seen along an imaginary line extending transversally across the fin direction, from an edge of the respective heat exchanger plate which is closest to the respective port and which extends along the longitudinally extending fin direction.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the respective port interface forms an angle α with the fin direction, wherein the angle α is between 110° and 160°. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the respective port interface extends along a substantially straight line. 
     
     
         4 . The heat exchanger according to any one of the  claim 1 , wherein the respective distribution structure and/or the respective collection structure, extends from a first, transversally central, corner of the respective port towards a second, transversally outer, corner of the respective port and leaves a transversally extending gap at the longitudinally extending edge being closest to the respective port. 
     
     
         5 . The heat exchanger according to  claim 4 ,
 wherein a major portion of a flow from the respective inlet port is distributed via the distribution structure to the fin structure respectively a major portion of a flow from the fin structure is collected via the collection structure to the respective outlet port; and   wherein a minor portion of the flow from the respective inlet port is transferred to the fin structure via said gap, respectively a minor portion of the flow from the fin structure is transferred to the respective outlet port via said gap.   
     
     
         6 . The heat exchanger according to  claim 5 , wherein a cut in the respective heat exchanger plate forming respective port is arc-shaped along at least a major portion of a transversal extension of said gap. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the distribution structure is formed by a basically triangular or truncated triangular fin structure. 
     
     
         8 . according to  claim 1 , wherein the collection structure is formed by a basically triangular or truncated triangular fin structure. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein the respective ports are formed as substantially triangular ports. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein dimensions of the first inlet and outlet ports are different from dimensions of the second inlet and outlet ports. 
     
     
         11 . The heat exchanger according to  claim 1 , wherein an internal interface between the respective distribution structure and the fin structure and/or an internal interface between the respective collection structure and the fin structure in the respective channel of the first set of channels and/or in the respective channel of the second set of channels is inclined relative to the longitudinally extending fin direction and is inclined also relative to a transversal direction. 
     
     
         12 . The heat exchanger according to  claim 11 , wherein the respective internal interface forms an angle β with the fin direction wherein the angle β is between 95° and 130° or between 50° and 85°. 
     
     
         13 . The heat exchanger according to  claim 11 , wherein the respective internal interface extends along a substantially straight line. 
     
     
         14 . The heat exchanger according to  claim 1 , wherein the first inlet port is arranged on a first longitudinally extending side of the stack of heat exchanger plates and the first outlet port is arranged on a second longitudinally extending side of the stack of heat exchanger plates, the second longitudinally extending side being opposite the first longitudinally extending side, and
 wherein the second inlet port is arranged on the first longitudinally extending side of the stack of heat exchanger plates and the second outlet port is arranged on the second longitudinally extending side of the stack of heat exchanger plates, the first longitudinally extending side being opposite the second longitudinally extending side.   
     
     
         15 . The heat exchanger according to  claim 1 , wherein, in a first channel of the first set of channels, a first fin structure comprises at least a first and a second part arranged one after the other along the fin direction.
 wherein, in a first channel of the second set of channels the first channel of the second set of channels being a neighbouring channel to the first channel of the first set of channels a second fin structure comprises at least a first and a second part arranged one after the other along the fin direction,   wherein a central interface between the first and second parts of the first fin structure extends across the longitudinal fin direction and is positioned at a first position along the fin direction,   wherein a central interface between the first and second parts of the second fin structure extends across the fin direction and is positioned at a second position along the fin direction, and   wherein the first and second positions are separated a longitudinal distance from each other.   
     
     
         16 . The heat exchanger according to  claim 1 , wherein the angle α is between 120° and 150°. 
     
     
         17 . The heat exchanger according to  claim 11 , wherein the angle β is between 95° and 120° or between 60° and 85°.