Heat exchanger, in particular a heating element for motor vehicles

Abstract

A heat exchanger, in particular a heating element for motor vehicles, is provided that includes a block that has flat tubes and corrugated fins and a collecting tank on the inlet side and on the outlet side, wherein the flat tubes comprise flat sides having embossed vortex generators, and a coolant can flow through the flat tubes. The flat tubes can have an inner diameter in the range of 0.9 to 1.2 mm, preferably of 1.0 mm, and the corrugated fins can have a height in the range of 6.3 to 8.0 mm, preferably of 8.3 mm.

1 . A heat exchanger comprising:
 a block having flat tubes and corrugated fins;   a collecting tank arranged on an inlet side and on an outlet side,   wherein the flat tubes comprise flat sides having embossed vortex generators, the flat tubes being configured such that a coolant flows there through, and   wherein the flat tubes have an inner diameter in a range of 0.9 to 1.2 mm, and the corrugated fins have a height in a range of 6.3 to 8.0 mm.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the ratio of the corrugated fin height to inner diameter of the flat tubes is in a range of 5 to 9 or in a range of 6.3 to 7.2 mm. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the flat tube is configured as a folded tube having two chambers partitioned off by a fold. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the flat tube has a depth in a range of 15 to 35 mm, preferably 26 mm. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein the vortex generators are longitudinal and have a length in a range of 1.5 to 4.0 mm, preferably 2.5 mm. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein the vortex generators have a width in a range of 1.0 to 2.5 mm, in particular 1.25 mm. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the vortex generators have a depth in a range of 0.15 to 0.35 mm, in particular 0.25 mm. 
     
     
         8 . The heat exchanger according to  claim 1 , wherein the vortex generators have a longitudinal axis, and the longitudinal axis forms an inclination angle with the flow direction in the flat tube in a range of 15 to 25°, in particular 20°. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein the vortex generators are arranged in rows transversely to the flow direction in the flat tube, and wherein a plurality of vortex generators in the range of 4 to 10, in particular 6 vortex generators are provided in one row of the flat tube. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein a density of the corrugated fins is in a range of 85 to 105 fins/dm. 
     
     
         11 . The heat exchanger according to  claim 1 , wherein a material thickness of the flat tubes is in a range of 0.15 to 0.3 mm, in particular 0.20 mm. 
     
     
         12 . The heat exchanger according to  claim 1 , wherein a material thickness of the corrugated fins is in a range of 0.06 to 0.10 mm, in particular in a range of 0.07 to 0.08 mm. 
     
     
         13 . The heat exchanger according to  claim 1 , wherein the heat exchanger is a heater core for a motor vehicle. 
     
     
         14 . The heat exchanger according to  claim 1 , wherein the inner diameter of the flat tubes is 1.0 mm, and wherein the height of the corrugated fins is 6.3 mm.