Aerosol-generating article comprising an aerosol-cooling element with an elongated protrusion

Abstract

An aerosol-generating article is provided, including a rod of aerosol-generating substrate; an aerosol-cooling element downstream of the rod and including a hollow tubular segment including a peripheral wall, the segment extending along a longitudinal axis and having a downstream end in fluid communication with an upstream end, the segment further including at least one elongated protrusion extending from the peripheral wall into an interior of the segment, the protrusion extending longitudinally from an upstream position on the wall to a downstream position on the wall; and a wrapper circumscribing the rod and the aerosol-cooling element, the protrusion being a deflecting fin configured to change a direction of flow of an aerosol flowing from the upstream to the downstream end the segment, and the fin being twisted along a length of the segment.

1 .- 14 . (canceled) 
     
     
         15 . An aerosol-generating article for producing an aerosol upon heating, the aerosol-generating article comprising:
 a rod of aerosol-generating substrate;   an aerosol-cooling element, positioned downstream of the rod of aerosol-generating substrate, the aerosol-cooling element comprising a hollow tubular segment comprising a peripheral wall, the hollow tubular segment extending along a longitudinal axis and having a downstream end in fluid communication with an upstream end, wherein the hollow tubular segment further comprises at least one elongated protrusion extending from the peripheral wall into an interior of the hollow tubular segment, the at least one elongated protrusion extending longitudinally from an upstream position on the peripheral wall to a downstream position on the peripheral wall downstream of the upstream position; and   a wrapper circumscribing the rod of aerosol-generating substrate and the aerosol-cooling element,   wherein the at least one elongated protrusion is a deflecting fin configured to change a direction of flow of an aerosol flowing from the upstream end to the downstream end of the hollow tubular segment, and   wherein the deflecting fin is twisted along a length of the hollow tubular segment.   
     
     
         16 . The aerosol-generating article according to  claim 15 , wherein the at least one elongated protrusion extends along a radial direction from the peripheral wall towards a central axis of the hollow tubular segment. 
     
     
         17 . The aerosol-generating article according to  claim 15 , wherein a height of the at least one elongated protrusion varies between the upstream position and the downstream position. 
     
     
         18 . The aerosol-generating article according to  claim 17 , wherein the height of the at least one elongated protrusion decreases between one of the upstream position and the downstream position and the other. 
     
     
         19 . The aerosol-generating article according to  claim 15 ,
 wherein the deflecting fin comprises first and second opposing surfaces, and   wherein an angle formed between a reference plane, the reference plane being parallel to the longitudinal axis and bisecting the internal volume of the hollow tubular segment, and the first surface of the deflecting fin at the upstream position is different from an angle formed between the reference plane and the first surface of the deflecting fin at the downstream position.   
     
     
         20 . The aerosol-generating article according to  claim 15 , wherein a circumferential position of the at least one elongated protrusion varies between its upstream position and its downstream position. 
     
     
         21 . The aerosol-generating article according to  claim 15 , wherein a height of the at least one elongated protrusion is less than a radius of the hollow tubular segment. 
     
     
         22 . The aerosol-generating article according to  claim 15 ,
 wherein the upstream position is located between the upstream end of the hollow tubular segment and a midpoint of the hollow tubular segment, and   wherein the downstream position is located between the midpoint of the hollow tubular segment and the downstream end of the hollow tubular segment.   
     
     
         23 . The aerosol-generating article according to  claim 15 , wherein the at least one elongated protrusion extends longitudinally from the upstream end of the hollow tubular segment to the downstream end of the hollow tubular segment. 
     
     
         24 . The aerosol-generating article according to  claim 15 , wherein a length of the aerosol-generating article is from about 8 mm to about 30 mm. 
     
     
         25 . The aerosol-generating article according to  claim 15 , wherein a thickness of the at least one elongated protrusion is from about 0.1 mm to about 1 mm. 
     
     
         26 . The aerosol-generating article according to  claim 15 , wherein the at least one elongated protrusion comprises a plurality of elongated protrusions radially distributed on the peripheral wall.