Heater assembly with heater mounting

Abstract

A heater assembly for an aerosol-generating device is provided, the heater assembly including: a tubular heating chamber including a proximal flared end and being configured to heat an aerosol-forming substrate; and a heater casing including a proximal wall and being arranged around the heating chamber, the proximal wall including a circular groove extending in a proximal direction from an inner surface of the proximal wall, the circular groove including a chamfered inner side wall, the chamfered inner side wall and the proximal flared end of the tubular heating chamber having matching shapes, and the proximal flared end of the tubular heating chamber being mounted into the circular groove of the proximal wall. An aerosol-generating device including the heater assembly, and an aerosol-generating system including the aerosol-generating device and an aerosol-generating article, are also provided.

1 .- 15 . (canceled) 
     
     
         16 . A heater assembly for an aerosol-generating device, the heater assembly comprising:
 a tubular heating chamber comprising a proximal flared end and being configured to heat an aerosol-forming substrate; and   a heater casing comprising a proximal wall and being arranged around the heating chamber,
 wherein the proximal wall comprises a circular groove extending in a proximal direction from an inner surface of the proximal wall, 
 wherein the circular groove comprises a chamfered inner side wall, 
 wherein the chamfered inner side wall and the proximal flared end of the tubular heating chamber have matching shapes, and 
 wherein the proximal flared end of the tubular heating chamber is mounted into the circular groove of the proximal wall. 
   
     
     
         17 . The heater assembly according to  claim 16 , wherein the chamfered inner side wall of the heater casing is flared in a proximal direction. 
     
     
         18 . The heater assembly according to  claim 16 , wherein the tubular heating chamber further comprises a distal flared end. 
     
     
         19 . The heater assembly according to  claim 18 ,
 further comprising a heater mounting,   wherein the distal flared end of the tubular heating chamber is mounted into the heater mounting.   
     
     
         20 . The heater assembly according to  claim 18 ,
 further comprising a heater mounting,   wherein the distal flared end of the tubular heating chamber is mounted into the heater mounting,   wherein the heater mounting comprises at a proximal end an additional circular groove extending in a distal direction from an inner proximal surface of the heater mounting,   wherein the additional circular groove comprises a chamfered inner side wall,   wherein the chamfered inner side wall is flared in a distal direction,   wherein the chamfered inner side wall and the distal flared end of the tubular heating chamber have matching shapes, and   wherein the distal flared end of the tubular heating chamber is mounted into the additional circular groove of the heater mounting.   
     
     
         21 . The heater assembly according to  claim 20 , wherein one or both of the chamfered inner side wall of the heater casing and the chamfered inner side wall of the heater mounting comprises at least one rib. 
     
     
         22 . The heater assembly according to  claim 20 , wherein one or both of the chamfered inner side wall of the heater casing and the chamfered inner side wall of the heater mounting comprises three ribs. 
     
     
         23 . The heater assembly according to  claim 16 , wherein the chamfered inner side wall of the heater casing has a same chamfer angle as the proximal flared end of the tubular heating chamber. 
     
     
         24 . The heater assembly according to  claim 23 , wherein the proximal flared end of the tubular heating chamber and the chamfered inner side wall of the heater casing have a chamfer angle of between 20° and 45°. 
     
     
         25 . The heater assembly according to  claim 23 , wherein the proximal flared end of the tubular heating chamber and the chamfered inner side wall of the heater casing have a chamfer angle of about 30°. 
     
     
         26 . The heater assembly according to  claim 16 , wherein a length of the proximal flared end of the tubular heating chamber and of the chamfered inner side wall of the heater casing is between 0.5 millimetre and 5 millimetres. 
     
     
         27 . The heater assembly according to  claim 16 , wherein a length of the proximal flared end of the tubular heating chamber and of the chamfered inner side wall of the heater casing is about 1 millimeter. 
     
     
         28 . The heater assembly according to  claim 16 ,
 wherein the heater casing further comprises a proximal heater casing and a distal heater casing, and   wherein the proximal heater casing comprises the proximal wall with the circular groove.   
     
     
         29 . The heater assembly according to  claim 28 ,
 further comprising a heater mounting,   wherein the tubular heating chamber further comprises a distal flared end,   wherein the distal flared end of the tubular heating chamber is mounted into the heater mounting, and   wherein the distal heater casing comprises the heater mounting or wherein the heater mounting is mounted into a distal opening of the distal heater casing.   
     
     
         30 . The heater assembly according to  claim 29 , wherein the tubular heating chamber is sandwiched between or press-fit into the proximal heater casing and the heater mounting. 
     
     
         31 . The heater assembly according to  claim 29 ,
 wherein the heater mounting is mounted into a distal opening of the distal heater casing, and   wherein a seal is arranged between the heater mounting and an internal surface of the distal heater casing.   
     
     
         32 . The heater assembly according to  claim 31 ,
 wherein one or both of the chamfered inner side wall of the heater casing and a chamfered inner side wall of the heater mounting comprises at least one rib, and   wherein the proximal heater casing, the distal heater casing, the tubular heating chamber, the heater mounting, and the seal enclose an air space.   
     
     
         33 . The heater assembly according to  claim 31 ,
 wherein one or both of the chamfered inner side wall of the heater casing and a chamfered inner side wall of the heater mounting comprises three ribs, and   wherein the proximal heater casing, the distal heater casing, the tubular heating chamber, the heater mounting, and the seal enclose a hollow air-tight space.   
     
     
         34 . An aerosol-generating device comprising the heater assembly according to  claim 16 . 
     
     
         35 . An aerosol-generating system comprising the aerosol-generating device according to  claim 16  and an aerosol-generating article comprising a substrate portion comprising an aerosol-forming substrate, wherein the aerosol-generating article is configured to be at least partly inserted into the tubular heating chamber.