Heat exchanger

Abstract

Heat exchanger ( 1 ) provided with a housing ( 2 ) having a core ( 3 ). The core ( 3 ) comprises a series of plate-shaped fins ( 10 ) placed at least almost parallel to each other, in which each fin ( 10 ) is provided with pipe openings ( 13 ), and bundle of pipes ( 8 ) for passing a first heat exchange medium. Each of the pipes ( 8 ) extends through respective pipe openings ( 13 ) of respective fins ( 10 ). The housing ( 2 ) is provided with an inlet ( 5 ) and an outlet ( 7 ) for passing a second heat exchange medium through the housing ( 2 ). At least one of the fins ( 10 ) is further provided with mix openings ( 20 ). Preferably at least one of the fins ( 10 ) is further provided with local elevations ( 23 ). Preferably between the core ( 3 ) and the housing ( 2 ) a strip ( 14 ), preferably of springy material, has been arranged for reducing leakage between the core ( 3 ) and the housing ( 2 ).

1 . Heat exchanger provided with a housing having a core, comprising a series of plate-shaped fins placed at least almost parallel to each other, in which each fin is provided with pipe openings, and a bundle of pipes for passing a first heat exchange medium, in which each of the pipes extends through respective pipe openings of respective fins, in which the housing is provided with an inlet and an outlet for passing a second heat exchange medium through the housing, which flows between the fins according to a flow direction, characterized in that at least one of the plate-shaped fins is provided with cut out mix openings, wherein the respective plate-shaped fin is provided with a torsion to both sides of the around said mix openings.  
     
     
         2 . heat exchanger according to  claim 1 , wherein the torsion is in a plane perpendicular to the flow direction of the second heat exchange medium.  
     
     
         3 . Heat exchanger according to  claim 1  or  2 , characterized in that the mix openings are placed there where a rate of flow of the second heat exchange medium is high in comparison to the rate of flow on other locations.  
     
     
         4 . Heat exchanger according to  claim 1 ,  2  or  3 , characterized in that the pipe openings are situated in rows next to each other, said rows extending perpendicular to the flow direction of the second heat exchange medium, wherein each of the mix openings is situated between respective adjacent pipe openings.  
     
     
         5 . Heat exchanger according to  claim 4 , in which the centres of two adjacent pipe openings are connected to each other by an imaginary connecting line, wherein two mix openings are placed on either side at equal distance from the connecting line.  
     
     
         6 . Heat exchanger according to  claim 5 , wherein adjacent pipe opening rows are offset with respect to each other over half a pipe distance perpendicular to the flow direction of the second heat exchange medium.  
     
     
         7 . Heat exchanger according to any one of the preceding claims, characterized in that the torsion is such that a flow of second heat exchange medium is directed at a pipe and to a plate-shaped fin, respectively.  
     
     
         8 . Heat exchanger according to any one of the preceding claims, characterized in that the mix openings are semi-circular.  
     
     
         9 . Heat exchanger according to any of the claims  1 - 7 , characterized in that the mix openings are circular.  
     
     
         10 . Heat exchanger according to any of the claims  1 - 7 , characterized in that the mix openings are oval.  
     
     
         11 . Heat exchanger according to any one of the preceding claims, characterized in that at least one of the fins is further provided with local elevations.  
     
     
         12 . Heat exchanger according to  claim 11 , characterized in that at least one of the elevations is provided with a groove.  
     
     
         13 . Heat exchanger according to any one of the preceding claims, characterized in that the distance between two adjacent fins is within a range of 0.5 and 2.0 mm.  
     
     
         14 . Plate-shaped fin to be used in a heat exchanger according to any one of the preceding claims.  
     
     
         15 . Heat exchanger according to any one of the preceding claims, characterized in that several fins are provided with mix openings, and in that the heat exchanger is further provided with at least one thread which extends through respective openings of respective fins.  
     
     
         16 . Heat exchanger according to  claim 15 , in which each respective fin has a circumferential edge, in which the thread is located near the circumferential edge.  
     
     
         17 . Heat exchanger according to any one of the preceding claims, characterized in that between the core and the housing a strip has been arranged for reducing leakage between the core and the housing.  
     
     
         18 . Heat exchanger according to  claim 17 , characterized in that the strip is of a springy material.  
     
     
         19 . Heat exchanger provided with a housing having a core, comprising a series of plate-shaped fins placed at least almost parallel to each other, in which each fin is provided with pipe openings, and a bundle of pipes for passing a first heat exchange medium, in which each of the pipes extends through respective pipe openings of respective fins, in which the housing is provided with an inlet and an outlet for passing a second heat exchange medium through the housing, characterized in that between the core and the housing a strip has been arranged for reducing leakage between the core and the housing.  
     
     
         20 . Heat exchanger according to  claim 19 , characterized in that the strip is of a springy material.