Heat Exchanger for an Air Heating Device and Method for Producing a Heat Exchanger

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 heat exchanger body ( 14 ) with a longitudinal axis. According to the invention, the heat exchanger body ( 14 ) has on its external surface (external side) a plurality of undular ribs ( 28 ) which extend essentially along its circumferential dimension, which ribs provide heat transfer surfaces.

1 . A heat exchanger ( 10 ) for an air heating apparatus ( 12 ) for integration into an air-guiding housing, which heat exchanger has a heat exchanger body ( 14 ) with a longitudinal axis; characterized in that the heat exchanger body ( 14 ) has on its external surface (external side) a plurality of undular ribs ( 28 ) which extend essentially along its circumferential dimension, which ribs provide heat transfer surfaces.  
   
   
       2 . A heat exchanger ( 10 ) according to  claim 1;  characterized in that the heat exchanger body ( 14 ) has a heat exchanger core ( 20 ); 
 and in that the plurality of undular ribs ( 28 ) are at least to some extent integrally formed with the heat exchanger core ( 20 ).    
   
   
       3 . A heat exchanger ( 10 ) according to  claim 1;  characterized in that the heat exchanger body ( 14 ) has a heat exchanger core ( 20 ); 
 and in that    the plurality of undular ribs ( 28 ) are at least to some extent applied to the heat exchanger core ( 20 ) via separate component parts or as separate components.    
   
   
       4 . A heat exchanger ( 10 ) according to  claim 3;  characterized in that the plurality of undular ribs ( 28 ) are applied to the heat exchanger core by shrink-forming and/or press-forming methods.  
   
   
       5 . A method of fabricating a heat exchanger ( 10 ) for an air heating apparatus ( 12 ) to be integrated into an air-guiding housing, particularly a housing of an onboard heating and air conditioning system of a motor vehicle, wherewith the heat exchanger has a heat exchanger body ( 14 ) which has a heat exchanger core ( 20 ) which has a longitudinal axis, and said heat exchanger has heat transfer surfaces; characterized in that the heat exchanger body ( 14 ) has on its external surface (external side) a plurality of undular ribs ( 28 ) which extend essentially along its circumferential dimension, which ribs provide heat transfer surfaces, wherewith the heat exchanger core ( 20 ) and the undular ribs are at least to some extent separately fabricated.  
   
   
       6 . A method according to  claim 5;  characterized in that the plurality of undular ribs ( 28 ) are applied to the heat exchanger core by shrink-forming and/or press-forming methods.  
   
   
       7 . A method of fabricating a heat exchanger ( 10 ) for an air heating apparatus ( 12 ) to be integrated into an air-guiding housing, particularly a housing of an onboard heating and air conditioning system of a motor vehicle, wherewith the heat exchanger has a heat exchanger body ( 14 ) which has a heat exchanger core ( 20 ) which has a longitudinal axis, and said heat exchanger has heat transfer surfaces; characterized in that 
 the heat exchanger body ( 14 ) has on its external surface (external side) a plurality of undular ribs ( 28 ) which extend essentially along its circumferential dimension, which ribs provide heat transfer surfaces, wherewith the heat exchanger core ( 20 ) and the undular ribs are fabricated so as to have together a unit construction.