Extruded wing tube portion, wing tube comprising an extruded wing-tube portion, and heat exchanger comprising a wing tube, and method for producing a wing-tube portion

Abstract

An extruded wing tube section ( 10 ) according to the invention consists of a formed tube portion ( 12 ) comprising at least one first wing section ( 20 ) integrally formed thereon in a first radial plane of the tube portion ( 12 ). The first wing section ( 20 ) has a plurality of first radial cut-outs such that a plurality of first wings ( 22 ) is provided in the first wing portion ( 20 ). Each of the first wings ( 20 ) is rotated about a radial axis of rotation such that each of the first wings ( 22 ) is rotated out of the first radial plane by a first angle 0°<α 1 <π° A first continuous transition portion is provided between the tube region ( 12 ) and each of the first wings ( 22 ), which transition portion has a twisted portion in the portion of the axis of rotation, and at least one expansion portion adjacent thereto.

1 - 20 . (canceled) 
     
     
         21 . An extruded wing tube section having a formed tube portion with at least one first integrally formed wing section in a first radial plane of the formed tube portion, wherein
 a. the at least one first wing section has a plurality of first radial cut-outs so that a plurality of first wings is present in the at least one first wing section, and   b. each of the first wings of the plurality of first wings is rotated about a radial rotation axis so that each of the first wings of the plurality of first wings is rotated out of the first radial plane about a first angle 0°<α 1 <90°, wherein   c. a first continuous transition portion is present between the formed tube portion and each of the first wings of the plurality of first wings, the first continuous transition portion having a twisted portion in the portion of the rotation axis and at least one adjacent expansion portion.   
     
     
         22 . The extruded wing tube section according to  claim 21 , where the first angle α 1  lies between 30° and 60°. 
     
     
         23 . The extruded wing tube section according to  claim 21 , which is made from aluminum. 
     
     
         24 . The extruded wing tube section according to  claim 21 , where an outer diameter of the formed tube portion extending in a straight manner lies between 3 and 10 mm and/or a wall thickness in the formed tube portion is 0.3 to 0.9 mm. 
     
     
         25 . The extruded wing tube section according to  claim 21 , where the at least one first wing section has an extension E r  in the radial direction between 10 and 20 mm and/or each of the first radial cut-outs has a width of 3 to 8 mm. 
     
     
         26 . The extruded wing tube section according to  claim 21 , where the first continuous transition portion includes two expansion portions on opposite sides with respect to the twisted portion. 
     
     
         27 . The extruded wing tube section according to  claim 21 , which further includes a second wing section which is formed integrally at the formed tube portion in a second radial plane of the formed tube portion, wherein
 a. the second wing section comprises a plurality of second radial cut-outs so that a plurality of second wings is present in the second wing section, and   b. each one of the second wings of the plurality of second wings is rotated about a radial rotation axis so that each one of the second wings of the plurality of second wings is rotated out of the second radial plane by a second angle 0°<α 2 <90°, wherein   c. a second continuous transition portion is present between the formed tube portion and each second wing, the second continuous transition portion comprising a twisted portion in the portion of the rotation axis and at least one adjacent expansion portion.   
     
     
         28 . The extruded wing tube section according to  claim 27 , where the second wing section is arranged opposite the first wing section at the tube portion which extends in a straight manner, so that the first radial plane and the second radial plane form a joint plane in which the longitudinal axis of the formed tube portion is arranged. 
     
     
         29 . The extruded wing tube section according to  claim 27 , where the first α 1  and the second angle α 2  are the same. 
     
     
         30 . The extruded wing tube section according to  claim 27 , where the second wing section has an extension E r  in the radial direction between 10 and 20 mm and/or each one of the second cut-outs has a width of 3 to 8 mm. 
     
     
         31 . The extruded wing tube section according to  claim 27 , where the second continuous transition portion comprises two expansion portions on opposite sides with respect to the twisted portion. 
     
     
         32 . A wing tube for a heat exchanger, said wing tube including at least two extruded wing tube sections according to  claim 21 , the longitudinal axes of which extend parallel to one another and which are connected by means of a wingless bent section. 
     
     
         33 . A heat exchanger comprising a wing tube according to  claim 32 . 
     
     
         34 . A production method of an extruded wing tube section according to  claim 21 , comprising the following steps:
 a. extruding the wing tube section having a tube portion as well as at least one integrally configured wing section,   b. making a plurality of radial cut-outs transverse to the longitudinal axis of the tube portion into the first wing section, so that with respect to the first wing section, a plurality of first wings develops, and   c. twisting of at least one wing out of the plurality of first wings out of the radial plane at the same time of or following the making of the cut-outs, so that a first continuous transition portion develops having a twisted portion in the portion of the rotation axis as well as at least one adjacent expansion portion after concluding the twisting.   
     
     
         35 . The production method according to  claim 34  wherein the step of extruding includes the extruding of the wing tube section with at least one further integrally formed wing section. 
     
     
         36 . The extruded wing tube section according to  claim 22 , which is made from aluminum. 
     
     
         37 . The extruded wing tube section according to  claim 22 , where an outer diameter of the formed tube portion extending in a straight manner lies between 3 and 10 mm and/or a wall thickness in the formed tube portion is 0.3 to 0.9 mm. 
     
     
         38 . The extruded wing tube section according to  claim 22 , where the at least one first wing section has an extension E r  in the radial direction between 10 and 20 mm and/or each of the first cut-outs has a width of 3 to 8 mm. 
     
     
         39 . The extruded wing tube section according to  claim 22 , where the first continuous transition portion includes two expansion portions on opposite sides with respect to the twisted portion. 
     
     
         40 . The extruded wing tube section according to  claim 22 , which further includes a second wing section which is formed integrally at the formed tube portion in a second radial plane of the formed tube portion, wherein
 a. the second wing section comprises a plurality of second radial cut-outs so that a plurality of second wings is present in the second wing section, and   b. each one of the second wings of the plurality of second wings is rotated about a radial rotation axis so that each one of the second wings of the plurality of second wings is rotated out of the second radial plane by a second angle 0°<α 2 <90°, wherein   c. a second continuous transition portion is present between the formed tube portion and each second wing, the second continuous transition portion comprising a twisted portion in the portion of the rotation axis and at least one adjacent expansion portion.