Heat exchanger

Abstract

The invention relates to a heat exchanger, particularly for a motor vehicle, comprising at least one duct ( 24 - 29 ) through which a fluid flows and of which at least some section have a curved shape. Preferably, said heat exchanger comprises several ducts through which a fluid flows and of which at least some sections have a curved shape. In order to increase the heat exchanging capacity, the duct ( 24 - 29 ) of which at least some sections have a curved shape is provided inside a profiled extruded element.

1 . A heat exchanger for a motor vehicle comprising at least one flow channel with a fluid throughflow, which at least in sections has a curved shape, wherein the at least one flow channel is provided in an extruded profile. 
     
     
         2 . The heat exchanger according to  claim 1 , comprising several flow channels which at least in sections have a curved shape, wherein the several flow channels are provided in an extruded profile. 
     
     
         3 . The heat exchanger according to  claim 2  wherein the extruded profile has at least one outer wall surrounded by the flow of a cooling agent, and at least one inner wall along which a combustion gas, flows. 
     
     
         4 . The heat exchanger according to  claim 3 , wherein the outer wall, surrounded by the flow of the cooling agent, has an at least partially rounded shape in the cross section. 
     
     
         5 - 6 . (canceled) 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the at least one flow channel has a corrosion-inhibiting coating. 
     
     
         8 . The heat exchanger according to  claim 1 , wherein, in addition to the curved shape at least in sections, the at least one flow channel has a 180° deflection. 
     
     
         9 . (canceled) 
     
     
         10 . The heat exchanger according  claim 1 , wherein the curved shape varies transversely to and/or in the direction of the extension of the flow channel. 
     
     
         11 . The heat exchanger according to  claim 1 , wherein the at least one flow channel has, downstream, an increasing amplitude (A) and/or a decreasing pitch (T). 
     
     
         12 . The heat exchanger according to  claim 11 , having a ratio between the amplitude (A) and thickness (d) of the extruded profile in the range of 0-2. 
     
     
         13 . The heat exchanger according to  claim 11 , having a ratio between the pitch (T) and thickness (d) of the extruded profile in the range of 3-10. 
     
     
         14 . The heat exchanger according to  claim 12 , wherein the ratio between the amplitude (A) and the thickness (d) of the extruded profile is in the range of 0-0.7. 
     
     
         15 . The exchanger according to  claim 1 , wherein the extruded profile has a thickness in the range of 3-12 mm. 
     
     
         16 - 18 . (canceled) 
     
     
         19 . The heat exchanger according to  claim 1 , further comprising a bypass flap upstream or downstream of the heat exchanger. 
     
     
         20 - 22 . (canceled) 
     
     
         23 . The heat exchanger according to  claim 2 , wherein the extruded profile is fixed at an end on a base element. 
     
     
         24 . (canceled) 
     
     
         25 . The heat exchanger according to  claim 2 , wherein the extruded profile is fixed at an end on two base elements. 
     
     
         26 - 29 . (canceled) 
     
     
         30 . The heat exchanger according to  claim 1 , wherein the extruded profile is situated in a housing a liquid cooling agent throughflow, the housing having an inflow and an outflow for the cooling agent. 
     
     
         31 . (canceled) 
     
     
         32 . The heat exchanger according to  claim 30 , wherein at least one guiding element for guiding the cooling agent is located in the housing. 
     
     
         33 . (canceled) 
     
     
         34 . The heat exchanger according to  claim 2 , further comprising support elements located between the extruded profiles. 
     
     
         35 - 38 . (canceled) 
     
     
         39 . The heat exchanger according to  claim 12 , having a ratio between the pitch (T) and the thickness (d) of the extruded profile in the range of 3-10.