Heat Exchanger for an Air Heating Device

Abstract

The invention relates to a heat exchanger ( 10 ) for an air heating apparatus ( 12 ) for integration into a housing which guides air. The heat exchanger has a longitudinal axis, wherewith air can be forcibly caused to flow around the heat exchanger in a “main flow direction” which is essentially perpendicular to said longitudinal axis. According to the invention, the heat exchanger has a cross sectional geometry [sic] perpendicular to the “main flow direction” which geometry is flattened with respect to a circular cross sectional geometry ( 32, 34, 36 ).

1 . A heat exchanger ( 10 ) for an air heating apparatus ( 12 ) for integration into an air-guiding housing, which heat exchanger has a longitudinal axis, wherewith air can be forcibly caused to flow around the heat exchanger in a “main flow direction” which is essentially perpendicular to said longitudinal axis; characterized in that the heat exchanger has a cross sectional geometry [in a cross sectional plane] perpendicular to the “main flow direction” which geometry is flattened with respect to a circular cross sectional geometry ( 32 ,  34 ,  36 ).  
   
   
       2 . A heat exchanger ( 10 ) according to  claim 1;  characterized in that the cross sectional geometry ( 32 ) is oval or ovaloid.  
   
   
       3 . A heat exchanger ( 10 ) according to  claim 1;  characterized in that the cross sectional geometry ( 34 ) is similar to the cross sectional shape of an airfoil.  
   
   
       4 . A heat exchanger ( 10 ) according to  claim 1;  characterized in that the cross sectional geometry ( 36 ) resembles a diamond shape.