A heat exchanger

Abstract

A heat exchanger includes heat exchanger plates, first and second sets of channels, and in each channel in the first and second set fin structures are positioned between the heat exchanger plates. In a first channel of the first set, a first fin structure comprises at least first and second parts. In a first channel of the second set, the first channel of the second set is a neighbouring channel to the first channel of the first set, and a second fin structure comprises at least first and second parts. An interface between the first and second parts of the first fin structure extends across the fin direction and is at a first position, an interface between the first and second parts of the second fin structure extends across the fin direction and is at a second position, and the first and second positions are separated from each other.

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 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 defining respective fluid channel of the first and second set of channels along a plurality of contact lines extending in parallel with a longitudinal fin direction,   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.   
     
     
         2 . A heat exchanger according to  claim 1 , wherein the distance between the first and second positions is such that any longitudinal gap at the central interface between the first and second part in the first channel of the first set of channels at least does not overlap a midline of any longitudinal gap at the central interface between the first and second part in the first channel of the second set of channels, and vice versa. 
     
     
         3 . A heat exchanger according to  claim 1 , wherein the distance between the first and second positions is such that any longitudinal gap at the central interface between the first and second part in the first channel of the first set of channels does not overlap with any longitudinal gap at the central interface between the first and second part in the first channel of the second set of channels, and vice versa. 
     
     
         4 . A heat exchanger according to  claim 1 , wherein the interface between the first and second parts of the first fin structure is defined by an edge of the first part of the first fin structure and an edge of the second part, wherein the edge of the first part has an extension with a transversal component and faces the edge of the second part and the second edge has an extension with a transversal component and faces said edge of the first part, and wherein the edge of the first part is arranged in parallel with the edge of the second part. 
     
     
         5 . A heat exchanger according to  claim 4 , wherein the edges of the first and second parts, respectively, of the first fin structure extend at an angle γ relative to the fin direction. 
     
     
         6 . A heat exchanger according to  claim 1 , wherein the interface between the first and second parts of the second fin structure is defined by an edge of the first part of the second fin structure and an edge of the second part, wherein the edge of the first part has an extension with a transversal component and faces the edge of the second part and the second edge has an extension with a transversal component and faces said edge of the first part, and wherein the edge of the first part is arranged in parallel with the edge of the second part. 
     
     
         7 . A heat exchanger according to  claim 6 , wherein the edges of the first and second parts, respectively, of the second fin structure extend at an angle γ relative to the fin direction. 
     
     
         8 . 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. 
     
     
         9 . The heat exchanger according to  claim 8 , 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°. 
     
     
         10 . The heat exchanger according to  claim 8 , wherein the respective internal interface extends along a substantially straight line. 
     
     
         11 . 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.   
     
     
         12 . The heat exchanger according to  claim 1 , 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. 
     
     
         13 . The heat exchanger according to  claim 12 , wherein the respective port interface forms an angle α with the fin direction, wherein the angle α is between 110° and 160°. 
     
     
         14 . The heat exchanger according to  claim 12 , wherein the respective port interface extends along a substantially straight line. 
     
     
         15 . The heat exchanger according to  claim 12 , 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. 
     
     
         16 . A heat exchanger according to  claim 4 , wherein the angle γ relative is between 95° and 130°. 
     
     
         17 . A heat exchanger according to  claim 6 , wherein the angle γ is between 95° and 130°. 
     
     
         18 . The heat exchanger according to  claim 8 , wherein the angle β is between 95° and 120° or between 60° and 85°. 
     
     
         19 . The heat exchanger according to  claim 12 , wherein the angle α is between 120° and 150°.