Aerosol-generating device comprising susceptor with angled perforations

Abstract

The invention relates to an aerosol-generating device (102) comprising a first cavity (106) configured for receiving a first aerosol-forming substrate. The device comprises a first airflow channel (110). The device comprises a heating arrangement comprising at least a first heating element (122). The first heating element comprises at least two or more first perforations (154). Each of the first perforations extends along a first perforation direction. The first perforation direction is angled with respect to a longitudinal axis of the first heating element. The first heating element is arranged between the first cavity and the first airflow channel. The heating element is arranged abutting the first cavity and the first airflow channel. The first perforation is configured for fluidly connecting the first cavity with the first airflow channel.

Description

[0001] AEROSOL-GENERATING DEVICE COMPRISING SUSCEPTOR WITH ANGLED PERFORATIONS

[0002] The present invention relates to an aerosol-generating device and an aerosolgenerating system.

[0003] It is known to provide an aerosol-generating device for generating an inhalable vapor. Such devices may heat aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate are volatilised without burning the aerosolforming substrate. Aerosol-forming substrate may be provided as part of an aerosolgenerating article. The aerosol-generating article may have a rod shape for insertion of the aerosol-generating article into a cavity, such as a heating chamber, of the aerosol-generating device. A heating element may be arranged in or around the heating chamber for heating the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol-generating device.

[0004] It would be desirable to provide an aerosol-generating system having an improved heating efficiency. It would be desirable to provide an aerosol-generating system that facilitates improved aerosol generation. It would be desirable to provide an aerosolgenerating system having an improved airflow through the system. It would be desirable to provide an aerosol-generating system with an improved aerosol delivery. It would be desirable to provide an aerosol-generating system, which can be more efficiently manufactured. It would be desirable to provide an aerosol-generating device for use with multiple aerosol-forming substrates.

[0005] According to a first aspect of the invention there is provided an aerosol-generating device. The device comprises a first cavity configured for receiving a first aerosol-forming substrate. The device comprises a first airflow channel. The device comprises a heating arrangement comprising at least a first heating element. The first heating element comprises at least two or more first perforations. Each of the first perforations extends along a first perforation direction. The first perforation direction is angled with respect to a longitudinal axis of the first heating element. The first heating element is arranged between the first cavity and the first airflow channel. The heating element is arranged abutting the first cavity and the first airflow channel. The first perforation is configured for fluidly connecting the first cavity with the first airflow channel.

[0006] According to an embodiment of the invention there is provided an aerosol-generating device. The device may comprise a first cavity configured for receiving a first aerosol-forming substrate. The device may comprise a first airflow channel. The device may comprise a heating arrangement comprising at least a first heating element. The first heating element may comprise at least two or more first perforations. Each of the first perforations may extend along a first perforation direction. The first perforation direction may be angled with respect to a longitudinal axis of the first heating element. The first heating element may be arranged between the first cavity and the first airflow channel. The heating element may be arranged abutting the first cavity and the first airflow channel. The first perforation may be configured for fluidly connecting the first cavity with the first airflow channel.

[0007] The first heating element may be arranged parallel to the first cavity. The first heating element may line at least a portion of the first cavity. The first heating element may be in contact with the first cavity. The first heating element may be arranged parallel to the first airflow channel. The first heating element may line at least a portion of the first airflow channel. The first heating element may be arranged parallel to the first cavity and the first airflow channel. The first cavity and the airflow channel may sandwich the first heating element.

[0008] The first heating element may be configured to heat the first aerosol-forming substrate inserted into the first cavity. The first aerosol-forming substrate may be part of a first aerosol-generating article. The first cavity may be configured to receive the first aerosolgenerating article. The first heating element may be configured to heat the first aerosolforming substrate of the first aerosol-generating article inserted into the first cavity.

[0009] The first cavity may be arranged radially outward of the first heating element. Alternatively, the first heating element may be arranged radially outward of the first cavity. The first heating element may be arranged radially outward of the first airflow channel. Alternatively, the first airflow channel may be arranged radially outward of the first heating element.

[0010] The first cavity may be cuboid-shaped. The first cavity may have a rectangular crosssection. The first cavity may be planar. The first cavity may be flat. The first cavity may be configured to closely match the shape of the first aerosol-forming substrate. The first cavity may be configured to closely match the shape of the first aerosol-generating article. The first cavity may be configured to slidably receive the first aerosol-forming substrate. The first cavity may be configured to slidably receive the first aerosol-generating article.

[0011] The first heating element may be cuboid-shaped. The first heating element may have a rectangular cross-section. The first heating element may be planar. The first heating element may be flat. The first heating element may be a sheet. The first heating element may be of perforated sheet.

[0012] The first airflow channel may be cuboid-shaped. The first airflow channel may have a rectangular cross-section. The first airflow channel may be planar. The first airflow channel may be flat.

[0013] Each of the two or more first perforations may be configured for fluidly connecting the first cavity with the first airflow channel. The aerosol-generating device may heat the aerosol-forming substrate with improved efficiency. The aerosol-generating device may provide improved airflow. The aerosolgenerating device may provide improved aerosol flow. The aerosol-generating device may provide improved resistance to draw (RTD). The aerosol-generating device may provide improved aerosol generation. The aerosol-generating device may provide an improved user experience. The aerosol-generating device may provide improved airflow characteristics. The aerosol-generating device may provide improved mixing of external air and volatized aerosolforming substrate. The aerosol-generating device may provide an aerosol of improved homogeneity. The aerosol-generating device may provide improved aerosol delivery.

[0014] The longitudinal axis of the first heating element may be arranged parallel to a longitudinal axis of the aerosol-generating device.

[0015] The first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and 150°

[0016] Preferably, the first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and below 90° or by between above 90° and 150°

[0017] The first perforation direction may be defined by the angle between the longitudinal axis of the first heating element and the first perforation direction.

[0018] The angle between the longitudinal axis of the first heating element and the first perforation direction may be between 30° and 150°. An angle direction may be defined in dependence of to the direction of an airflow through the first airflow channel. The angle direction may be a clockwise direction or an anticlockwise direction. The angle direction may be defined in dependence of the net direction of the airflow through the first airflow channel. The net airflow through the first airflow channel may extend from an upstream end of the first airflow channel to a downstream end of the first airflow channel.

[0019] Preferably, the angle between the longitudinal axis of the first heating element and the first perforation direction may be between 30° and below 90° or between above 90° and 150°

[0020] The first perforation direction may partially point in a downstream direction. The first perforation direction may partially point in an upstream direction. The first perforation direction may partially point in the direction of an airflow through the first airflow channel. The first perforation direction may partially point in a direction opposite to the direction of the airflow through the first airflow channel. The first perforation direction may partially point in a net direction of an airflow through the first airflow channel. The first perforation direction may partially point in a direction opposite to the net direction of the airflow through the first airflow channel. The first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is below 90° may partially point in an upstream direction. A component of the first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is below 90° may point in an upstream direction. A component of the first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the first airflow channel.

[0021] Each of the two or more first perforations may have an outlet abutting the first airflow channel. Each of the two or more first perforations may have an inlet abutting the first cavity. When the angle between the longitudinal axis of the first heating element and the first perforation direction is below 90°, the outlets of the two or more first perforations may be at least partially offset towards an upstream end of the first airflow channel relative to the corresponding inlets of the two or more first perforations.

[0022] The first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is above 90° may partially point in a downstream direction. A component of the first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is above 90° may point in a downstream direction. A component of the first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is above 90° may point in the same direction as the net direction of the airflow through the first airflow channel.

[0023] When the angle between the longitudinal axis of the first heating element and the first perforation direction is above 90°, the outlets of the two or more first perforations may be at least partially offset towards a downstream end of the first airflow channel relative to the corresponding inlets of the two or more first perforations.

[0024] The first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is 90° may be perpendicular to the net airflow direction through the first airflow channel. The first perforation direction in which the angle between the longitudinal axis of the first heating element and the first perforation direction is 90° may be perpendicular to a longitudinal axis of the first airflow channel.

[0025] The first heating element may comprise at least two or more second perforation. The second perforations may extend along a second perforation direction. The second perforation direction may be angled with respect to the longitudinal axis of the first heating element. The second perforations may be configured for fluidly connecting the first cavity with the airflow channel. Each of the two or more second perforations may be configured for fluidly connecting the first cavity with the first airflow channel.

[0026] Each of the two or more second perforations may extend along a second perforation direction.

[0027] The second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and 150°

[0028] Preferably, the second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and below 90° or by between above 90° and 150°

[0029] The second perforation direction may be defined by the angle between the longitudinal axis of the first heating element and the second perforation direction.

[0030] The angle between the longitudinal axis of the first heating element and the second perforation direction may be between 30° and 150°. The angle direction may be defined in dependence of the direction of the airflow through the first airflow channel. The angle direction may be a clockwise direction or an anticlockwise direction. The angle direction may be defined in dependence of the net direction of the airflow through the first airflow channel. The net airflow through the first airflow channel may extend from the upstream end of the first airflow channel to the downstream end of the first airflow channel.

[0031] Preferably, the angle between the longitudinal axis of the first heating element and the second perforation direction may be between 30° and below 90° or between above 90° and 150°

[0032] The second perforation direction may partially point in a downstream direction. The second perforation direction may partially point in an upstream direction. The second perforation direction may partially point in the direction of an airflow through the first airflow channel. The second perforation direction may partially point in a direction opposite to the direction of the airflow through the first airflow channel. The second perforation direction may partially point in a net direction of an airflow through the first airflow channel. The second perforation direction may partially point in a direction opposite to the net direction of the airflow through the first airflow channel.

[0033] The second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is below 90° may partially point in an upstream direction. A component of the second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is below 90° may point in an upstream direction. A component of the second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the first airflow channel. Each of the two or more second perforations may have an outlet abutting the first airflow channel. Each of the two or more second perforations may have an inlet abutting the first cavity. When the angle between the longitudinal axis of the first heating element and the second perforation direction is below 90°, the outlets of the two or more second perforations may be at least partially offset towards an upstream end of the first airflow channel relative to the corresponding inlets of the two or more second perforations.

[0034] The second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is above 90° may partially point in a downstream direction. A component of the second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is above 90° may point in a downstream direction. A component of the second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is above 90° may point in the same direction as the net direction of the airflow through the first airflow channel.

[0035] When the angle between the longitudinal axis of the first heating element and the second perforation direction is above 90°, the outlets of the two or more second perforations may be at least partially offset towards a downstream end of the first airflow channel relative to the corresponding inlets of the two or more second perforations.

[0036] The second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is 90° may be perpendicular to the net airflow direction through the first airflow channel. The second perforation direction in which the angle between the longitudinal axis of the first heating element and the second perforation direction is 90° may be perpendicular to a longitudinal axis of the first airflow channel.

[0037] The first perforation direction may be the same as the second perforation direction. The first perforation direction may be different to the second perforation direction. The second perforations may be arranged proximal to the first perforations. Alternatively, the first perforations and the second perforations may be interspersed.

[0038] The first perforation direction may partially point in an upstream direction and the second perforation direction may partially point in a downstream direction. The second perforation direction may partially point in a direction of an airflow through the first airflow channel and the first perforation direction may partially point in a direction opposite to the direction of the airflow through the first airflow channel. The two or more first perforations may be arranged upstream of the two or more second perforations. An improved airflow through the system may be provided. An improved aerosol delivery may be provided.

[0039] The first perforation direction may partially point in a downstream direction and the second perforation direction may partially point in an upstream direction. The first perforation direction may partially point in a direction of an airflow through the first airflow channel and the second perforation direction may partially point in a direction opposite to the direction of the airflow through the first airflow channel.

[0040] The first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and 90° The second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 90° and 150°

[0041] Preferably, the first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and below 90° Preferably, the second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between above 90° and 150°

[0042] The first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 30° and 85°, preferably by between 35° and 80°, more preferably by between 40° and 70°, and even more preferably by between 45° and 65°. The second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 95° and 150°, preferably by between 100° and 145°, more preferably by between 110° and 140°, and even more preferably by between 115° and 135° The first perforation direction may be angled with respect to the longitudinal axis of the first heating element by about 60° The second perforation direction may be angled with respect to the longitudinal axis of the first heating element by about 120°

[0043] The first perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 45° and 65°, and the second perforation direction may be angled with respect to the longitudinal axis of the first heating element by between 115° and 135°

[0044] The two or more first perforations may be arranged upstream of the two or more second perforations. Alternatively, the two or more first perforations and two or more second perforations may be interspersed.

[0045] An improved airflow through the system may be provided. An improved aerosol delivery may be provided. An improved aerosol homogeneity may be provided. An improved mixing may be provided.

[0046] The first perforations may be arranged upstream of the second perforations. The first perforations may be arranged in a first area of the first heating element. The second perforations may be arranged in a second area of the first heating element. The first area of the first heating element may be arranged upstream of the second area of the first heating element.

[0047] The heating arrangement may comprise a second heating element. The second heating element may comprise at least two or more third perforations. Each of the third perforations may extend along a third perforation direction. The third perforation direction may be angled with respect to a longitudinal axis of the second heating element.

[0048] The second heating element may be cuboid-shaped. The second heating element may have a rectangular cross-section. The second heating element may be planar. The second heating elements may be flat. The second heating element may be a sheet. The second heating element may be a perforated sheet.

[0049] The second heating element may be in contact with the first cavity. Alternatively, the second heating element may be in contact with a second cavity.

[0050] The second heating element may be configured to heat the first aerosol-forming substrate inserted into the first cavity. Alternatively, the second heating element may be configured to heat a second aerosol-forming substrate inserted into the second cavity.

[0051] The second heating element may be configured to heat the first aerosol-forming substrate of the first aerosol-generating article inserted into the first cavity. Alternatively, the second heating element may be configured to heat a second aerosol-forming substrate of a second aerosol-generating article inserted into the second cavity.

[0052] A longitudinal axis of the second heating element may extend between the distal end and the proximal end of the second heating element.

[0053] The longitudinal axis of the second heating element may be arranged parallel to a longitudinal axis of the aerosol-generating device.

[0054] The third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and 150°.

[0055] Preferably, the third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and below 90° or by between above 90° and 150°

[0056] The third perforation direction may be defined by the angle between the longitudinal axis of the second heating element and the third perforation direction.

[0057] The angle between the longitudinal axis of the second heating element and the third perforation direction may be between 30° and 150°. The angle direction may be defined in dependence of the direction of the airflow through the first airflow channel. The angle direction may be defined in dependence of the direction of the airflow through a second airflow channel. The angle direction may be a clockwise direction or an anticlockwise direction. The angle direction may be defined in dependence of the net direction of the airflow through the first airflow channel. The angle direction may be defined in dependence of the net direction of the airflow through the second airflow channel. The net airflow through the first airflow channel may extend from the upstream end of the first airflow channel to the downstream end of the first airflow channel. The net airflow through the second airflow channel may extend from the upstream end of the second airflow channel to the downstream end of the second airflow channel.

[0058] Preferably, the angle between the longitudinal axis of the second heating element and the third perforation direction may be between 30° and below 90° or between above 90° and 150°

[0059] The third perforation direction may partially point in a downstream direction. The third perforation direction may partially point in an upstream direction. The third perforation direction may partially point in the direction of an airflow through one of the first airflow channel and the second airflow channel. The third perforation direction may partially point in a direction opposite to the direction of the airflow through one of the first airflow channel and the second airflow channel. The third perforation direction may partially point in a net direction of an airflow through one of the first airflow channel and the second airflow channel. The third perforation direction may partially point in a direction opposite to the net direction of the airflow through one of the first airflow channel and the second airflow channel.

[0060] The third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is below 90° may partially point in an upstream direction. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is below 90° may point in an upstream direction. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the first airflow channel. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the second airflow channel.

[0061] Each of the two or more third perforations may have an outlet abutting the first airflow channel or the second airflow channel. Each of the two or more third perforations may have an inlet abutting the first cavity or the second cavity. When the angle between the longitudinal axis of the second heating element and the third perforation direction is below 90°, the outlets of the two or more third perforations may be at least partially offset towards an upstream end of the corresponding airflow channel relative to the corresponding inlets of the two or more third perforations.

[0062] The third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is above 90° may partially point in a downstream direction. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is above 90° may point in a downstream direction. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is above 90° may point in the same direction as the net direction of the airflow through the first airflow channel. A component of the third perforation direction in which the angle between the longitudinal axis of the second heating element and the third perforation direction is above 90° may point in the same direction as the net direction of the airflow through the second airflow channel.

[0063] When the angle between the longitudinal axis of the second heating element and the third perforation direction is above 90°, the outlets of the two or more third perforations may be at least partially offset towards a downstream end of the corresponding airflow channel relative to the corresponding inlets of the two or more third perforations.

[0064] The third perforation direction in which the angle between the longitudinal axis of the first heating element and the third perforation direction is 90° may be perpendicular to the net airflow direction through at least one of the first airflow channel and the second airflow channel. The third perforation direction in which the angle between the longitudinal axis of the first heating element and the third perforation direction is 90° may be perpendicular to a longitudinal axis of at least one of the first airflow channel and the second airflow channel.

[0065] The second heating element may comprise at least two or more fourth perforation. Each of the fourth perforations may extend along a fourth perforation direction. The fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element.

[0066] The fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and 150°.

[0067] Preferably, the fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and below 90° or by between above 90° and 150°

[0068] The fourth perforation direction may be defined by the angle between the longitudinal axis of the second heating element and the fourth perforation direction.

[0069] The angle between the longitudinal axis of the second heating element and the fourth perforation direction may be between 30° and 150°. The angle direction may be defined in dependence of the direction of the airflow through the first airflow channel. The angle direction may be defined in dependence of to the direction of the airflow through the second airflow channel. The angle direction may be a clockwise direction or an anticlockwise direction. The angle direction may be defined in dependence of the net direction of the airflow through the first airflow channel. The angle direction may be defined in dependence of the net direction of the airflow through the second airflow channel. The net airflow through the first airflow channel may extend from the upstream end of the first airflow channel to the downstream end of the first airflow channel. The net airflow through the second airflow channel may extend from the upstream end of the second airflow channel to the downstream end of the second airflow channel.

[0070] Preferably, the angle between the longitudinal axis of the second heating element and the fourth perforation direction may be between 30° and below 90° or by between above 90° and 150°

[0071] The fourth perforation direction may partially point in a downstream direction. The fourth perforation direction may partially point in an upstream direction. The fourth perforation direction may partially point in the direction of an airflow through one of the first airflow channel and the second airflow channel. The fourth perforation direction may partially point in a direction opposite to the direction of the airflow through one of the first airflow channel and the second airflow channel. The fourth perforation direction may partially point in a net direction of an airflow through one of the first airflow channel and the second airflow channel. The fourth perforation direction may partially point in a direction opposite to the net direction of the airflow through one of the first airflow channel and the second airflow channel.

[0072] The fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is below 90° may partially point in an upstream direction. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is below 90° may point in an upstream direction. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the first airflow channel. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is below 90° may point in a direction opposite to the net direction of the airflow through the second airflow channel.

[0073] Each of the two or more fourth perforations may have an outlet abutting the first airflow channel or the second airflow channel. Each of the two or more fourth perforations may have an inlet abutting the first cavity or the second cavity. When the angle between the longitudinal axis of the second heating element and the fourth perforation direction is below 90°, the outlets of the two or more fourth perforations may be at least partially offset towards an upstream end of the corresponding airflow channel relative to the corresponding inlets of the two or more fourth perforations.

[0074] The fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is above 90° may partially point in a downstream direction. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is above 90° may point in a downstream direction. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is above 90° may point in the same direction as the net direction of the airflow through the first airflow channel. A component of the fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is above 90° may point in the same direction as the net direction of the airflow through the second airflow channel.

[0075] When the angle between the longitudinal axis of the second heating element and the fourth perforation direction is above 90°, the outlets of the two or more fourth perforations may be at least partially offset towards a downstream end of the corresponding airflow channel relative to the corresponding inlets of the two or more fourth perforations.

[0076] The fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is 90° may be perpendicular to the net airflow direction through at least one of the first airflow channel and the second airflow channel. The fourth perforation direction in which the angle between the longitudinal axis of the second heating element and the fourth perforation direction is 90° may be perpendicular to a longitudinal axis of at least one of the first airflow channel and the second airflow channel.

[0077] Preferably, the first perforation direction may be obliquely angled with respect to a longitudinal axis of the first heating element. Preferably, the second perforation direction may be obliquely angled with respect to a longitudinal axis of the first heating element. Preferably, the third perforation direction may be obliquely angled with respect to a longitudinal axis of the second heating element. Preferably, the fourth perforation direction may be obliquely angled with respect to a longitudinal axis of the second heating element.

[0078] Preferably, a perforation direction being “angled” may refer to the perforation direction being obliquely angled. A perforation direction being obliquely angled may refer to the perforation direction partially pointing in a downstream direction. A perforation direction being obliquely angled may refer to the perforation direction partially pointing in an upstream direction. Preferably, a perforation direction being obliquely angled may exclude a perforation direction of 90°.

[0079] The obliquely angled perforations may improve airflow through the system. The obliquely angled perforations may improve airflow characteristics. The obliquely angled perforations may provide an improved aerosol delivery. The obliquely angled perforations may provide an improved user experience. The obliquely angled perforations may provide an improved aerosol quality. The obliquely angled perforations may provide improved mixing of volatized aerosol-forming substrate and air. The obliquely angled perforations may provide improved aerosol homogeneity. The obliquely angled perforations may create turbulences. The obliquely angled perforations may improve heat transfer. The obliquely angled perforations may accelerate the airflow. The obliquely angled perforations may decelerate the airflow.

[0080] The third perforation direction may be the same as the fourth perforation direction. The third perforation direction may be different to the fourth perforation direction. The fourth perforations may be arranged proximal to the third perforations. Alternatively, the third perforations and the fourth perforations may be interspersed.

[0081] The third perforation direction may at least partially point in an upstream direction and the fourth perforation direction may at least partially point in a downstream direction. The third perforation direction may at least partially point in the direction opposite to an airflow through one of the first airflow channel and the second airflow channel and the fourth perforation direction may at least partially point in the direction of the airflow through the corresponding one of the first airflow channel and the second airflow channel. The third perforations may be arranged upstream of the fourth perforations. An improved airflow through the system may be provided. An improved aerosol delivery may be provided.

[0082] The third perforation direction may at least partially point in a downstream direction and the fourth perforation direction may at least partially point in an upstream direction. The third perforation direction may at least partially point in the direction of an airflow through one of the first airflow channel and the second airflow channel and the fourth perforation direction may at least partially point in the direction opposite to the airflow through the corresponding one of the first airflow channel and the second airflow channel.

[0083] The third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and 90°. The fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 90° and 150°

[0084] Preferably, the third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and below 90° Preferably, the fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between above 90° and 150°

[0085] The third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 30° and 85°, preferably by between 35° and 80°, more preferably by between 40° and 70°, and even more preferably by between 45° and 65°. The fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 95° and 150°, preferably by between 100° and 145°, more preferably by between 110° and 140°, and even more preferably by between 115° and 135° The third perforation direction may be angled with respect to the longitudinal axis of the second heating element by about 60° The fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by about 120°. The third perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 45° and 65°, and the fourth perforation direction may be angled with respect to the longitudinal axis of the second heating element by between 115° and 135°

[0086] The two or more third perforations may be arranged upstream of the two or more fourth perforations. Alternatively, the two or more third perforations and two or more fourth perforations may be interspersed.

[0087] An improved airflow through the system may be provided. An improved aerosol delivery may be provided. An improved aerosol homogeneity may be provided. An improved mixing may be provided. An improved user experience may be provided.

[0088] The third perforations may be arranged upstream of the fourth perforations. The third perforations may be arranged in a first area of the second heating element. The fourth perforations may be arranged in a second area of the second heating element. The first area of the second heating element may be arranged upstream of the second area of the second heating element.

[0089] A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 90° and 150°, preferably between above 90° and 150°, may accelerate the airflow. A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 90° and 150°, preferably between above 90° and 150°, may accelerate the airflow toward a downstream end of the device. A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 90° and 150°, preferably between above 90° and 150°, may draw airflow from the cavity into the airflow channel. A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 30° and 90°, preferably between 30° and below 90°, may create turbulence. A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 30° and 90°, preferably between 30° and below 90°, may decelerate the airflow. A perforation direction angled with respect to the longitudinal axis of one of the first heating element and the second heating element by between 30° and 90°, preferably between 30° and below 90°, may improve mixing and heat transfer between an airflow directly entering the airflow channel from an air inlet of the device and the airflow from one or both of the first cavity and the second cavity into the airflow channel.

[0090] A perforation direction partially pointing in a downstream direction may accelerate the airflow. A perforation direction partially pointing in a downstream direction may accelerate the airflow toward a downstream end of the device. A perforation direction partially pointing in a downstream direction may draw airflow from the cavity into the airflow channel. A perforation direction partially pointing in an upstream direction may create turbulence. A perforation direction partially pointing in an upstream direction may decelerate the airflow. A perforation direction partially pointing in an upstream direction may improve mixing and heat transfer between an airflow directly entering the airflow channel from an air inlet of the device and the airflow from one or both of the first cavity and the second cavity into the airflow channel. An improved airflow through the system may be provided. An improved aerosol delivery may be provided.

[0091] A perforation direction partially pointing in a net direction of an airflow through one of the first airflow channel and the second airflow channel may accelerate the airflow. A perforation direction partially pointing in the net direction of the airflow through one of the first airflow channel and the second airflow channel may accelerate the airflow toward a downstream end of the device. A perforation direction partially pointing in the net direction of the airflow through one of the first airflow channel and the second airflow channel may draw airflow from the cavity into the airflow channel. A perforation direction partially pointing in a direction opposite to the net direction of the airflow through one of the first airflow channel and the second airflow channel may create turbulence. A perforation direction partially pointing in a direction opposite to the net direction of the airflow through one of the first airflow channel and the second airflow channel may decelerate the airflow. A perforation direction partially pointing in a direction opposite to the net direction of the airflow through one of the first airflow channel and the second airflow channel may improve mixing and heat transfer between an airflow directly entering the airflow channel from an air inlet of the device and the airflow from one or both of the first cavity and the second cavity into the airflow channel.

[0092] By providing perforations of different angles in the heating element, the airflow the characteristics of the airflow through the airflow channel abutting the heating element may be adjusted. The airflow may be adjusted by providing a specific distribution of the angled perforations in one or both of the first heating element and the second heating element. The airflow may be adjusted by providing a specific distribution of perforations angled between 30° and 90°, preferably between 30° and below 90°, and perforations angled between 90° and 150°, preferably between above 90° and 150°, in one or both of the first heating element and the second heating element.

[0093] The airflow may be adjusted by providing a specific distribution of perforations having a perforation direction partially pointing in an upstream direction and perforations having a perforation direction partially pointing in a downstream direction in one or both of the first heating element and the second heating element. The airflow may be adjusted by providing a specific distribution of perforations partially pointing in a direction opposite to a net direction of the airflow through the airflow channel and perforations partially pointing in the net direction of the airflow through the airflow channel.

[0094] For example, provision of perforations angled with respect to the longitudinal axis of one of the heating element by between 90° and 150°, preferably between above 90° and 150°, at a downstream end may help accelerating the airflow towards the downstream end. The downstream end may have a low pressure. Provision of perforations angled with respect to the longitudinal axis of the heating element by between 30° and 90°, preferably between 30° and below 90°, at an upstream end may create turbulence at the upstream end. The upstream end may have a high pressure.

[0095] The provision of perforations having a perforation direction partially pointing in a downstream direction at a downstream end of the airflow channel may help accelerating the airflow towards the downstream end. The provision of perforations having a perforation direction partially pointing in a net direction of an airflow through one or both of the first airflow channel and the second airflow channel at a downstream end of the airflow channel may help accelerating the airflow towards the downstream end.

[0096] Provision of perforations having a perforation direction partially pointing in an upstream direction at an upstream end of the airflow channel may create turbulence at the upstream end. Provision of perforations having a perforation direction partially pointing in a direction opposite to the net direction of the airflow through one or both of the first airflow channel and the second airflow channel at an upstream end of the airflow channel may create turbulence at the upstream end.

[0097] The device may comprise a second airflow channel. The second heating element may be arranged between the first cavity and the second airflow channel. The second heating element may be arranged abutting the first cavity and the second airflow channel. One or both of the third perforations and the fourth perforations may be configured for fluidly connecting the first cavity with the second airflow channel. The second heating element may be configured to contact the first cavity. The second heating element may be configured to contact one or both of the first aerosol-forming substrate and first aerosol-generating article inserted in the first cavity. The second heating element may be configured to heat the first aerosol-forming substrate.

[0098] Each of the two or more third perforations may be configured for fluidly connecting the first cavity with the second airflow channel. Each of the two or more fourth perforations may be configured for fluidly connecting the first cavity with the second airflow channel.

[0099] The second airflow channel may be cuboid-shaped. The second airflow channel may have a rectangular cross-section. The second airflow channel may be planar. The second airflow channel may be flat. The second airflow channel may be arranged parallel to the second heating element. The second airflow channel may be arranged parallel to the first cavity. The second heating element may be arranged radially outward of the first cavity. The second airflow channel may be arranged radially outward of the second heating element.

[0100] The device may comprise a second cavity configured for receiving a second aerosolforming substrate. The second cavity may be configured for receiving a second aerosolgenerating article comprising the second-aerosol-forming substrate.

[0101] The second cavity may be arranged abutting the second heating element. The second cavity may be in contact with the second heating element. The second heating element may be arranged between the second cavity and the first airflow channel. The second heating element may be arranged abutting the second cavity and the first airflow channel. One or both of the third perforations and the fourth perforations may be configured for fluidly connecting the second cavity with the first airflow channel. The second heating element may be configured to be in contact with one or both of the second aerosol-forming substrate or second aerosol-generating article. The second heating element may be configured to heat the second aerosol-forming substrate.

[0102] Each of the two or more third perforations may be configured for fluidly connecting the second cavity with the first airflow channel. Each of the two or more fourth perforations may be configured for fluidly connecting the second cavity with the first airflow channel.

[0103] The second cavity may be cuboid-shaped. The second cavity may have a rectangular cross-section. The second cavity may be planar. The second cavity may be flat. The second cavity may be configured to closely match the shape of the second aerosol-forming substrate. The second cavity may be configured to closely match the shape of the second aerosol-generating article. The second cavity may be configured to slidably receive the second aerosol-forming substrate. The second cavity may be configured to slidably receive the second aerosol-generating article.

[0104] The second cavity may be arranged parallel to the second heating element. The second cavity may be arranged parallel to the first airflow channel. The second heating element may be configured radially outward of the first airflow channel. The second cavity may be arranged radially outward of the second heating element.

[0105] The shape of the first cavity and the shape of the second cavity may be the same. Alternatively, the shape of the first cavity and the shape of the second cavity may be different.

[0106] The device may comprise a second cavity configured for receiving a second aerosolforming substrate. The device may comprise a second airflow channel. The second heating element may be arranged between the second cavity and the second airflow channel. The second heating element may be arranged abutting the second cavity and the second airflow channel. One or both of the third perforations and the fourth perforations may be configured for fluidly connecting the second cavity with the second airflow channel.

[0107] The first cavity may comprise an open end. The first cavity open end may be arranged at a downstream end of the first cavity. The second cavity may comprise an open end. The second cavity open end may be arranged at a downstream end of the second cavity. The first airflow channel may comprise an open end. The first airflow channel open end may be arranged at a downstream end of the first airflow channel. The second airflow channel may comprise an open end. The second airflow channel open end may be arranged at a downstream end of the second airflow channel.

[0108] The first aerosol-forming substrate may be inserted into the first cavity via the first cavity open end. The first aerosol-generating article may be inserted into the first cavity via the first cavity open end. The second aerosol-forming substrate may be inserted into the second cavity via the second cavity open end. The second aerosol-generating article may be inserted into the second cavity via the second cavity open end.

[0109] One or both of the first heating element and the second heating element may be a resistive heating element.

[0110] The first resistive heating element and the second resistive heating element may abut the first cavity. The first cavity may be arranged between the first resistive heating element and the second resistive heating element. The first resistive heating element may abut the first airflow channel. The second resistive heating element may abut the second airflow channel. The first resistive heating element and the second resistive heating element may be in contact with the first cavity.

[0111] The heating arrangement may comprise a first planar induction coil. The first planar induction coil may be configured abutting the first cavity. The first induction coil may have a rectangular cross-section. The first induction coil may be flat. The first induction coil may be cuboid-shaped.

[0112] The first planar induction coil may line the first cavity. The first planar induction coil may be arranged parallel to the first cavity. The first planar induction coil may be arranged parallel to the first heating element. The first planar induction coil may be parallel to the first airflow channel. The first planar induction coil may be arranged radially outward of the first cavity.

[0113] The first heating element may be as susceptor. The first heating element may be a perforated susceptor. The first heating element may be a first induction heating element. The first heating element may be a first perforated induction heating element.

[0114] Power may be provided to the first planar induction coil. The first planar induction coil may be configured to heat the first heating element. The first planar induction coil may generate an alternating magnetic field penetrating the first heating element. The first planar induction coil may be sealed. The first planar induction coil may be arranged in a device housing wall.

[0115] The heating arrangement may comprise a second planar induction coil. The second planar induction coil may be configured abutting the second cavity. The second induction coil may have a rectangular cross-section. The second induction coil may be flat. The second induction coil may be cuboid-shaped.

[0116] The second planar induction coil may line the second cavity. The second planar induction coil may be arranged parallel to second cavity. The second planar induction coil may be arranged parallel to the second heating element. The second planar induction coil may be parallel to the first airflow channel. The second planar induction coil may be parallel to the second airflow channel. The second planar induction coil may be arranged radially outward of the second cavity.

[0117] The second heating element may be as susceptor. The second heating element may be a perforated susceptor. The second heating element may be a second induction heating element. The second heating element may a second perforated induction heating element.

[0118] Power may be provided to the second planar induction coil. The second planar induction coil may be configured to heat the second heating element. The second planar induction coil may generate an alternating magnetic field penetrating the second heating element.

[0119] The second planar induction coil may be sealed. The second planar induction coil may be arranged in a device housing wall.

[0120] One or both of the first planar induction coil and the second planar induction coil may comprise shielding. The shielding may be an electromagnetic shielding. The electromagnetic shielding may at least partially shield the rest of the device from an electromagnetic field produced by or both of the first coil and the second coil. The shielding may be thermal shielding. The thermal shielding may protect a user holding the device from being burnt by the heat produced by one or more of the first heating element and the second heating element.

[0121] One or both of the first heating element and the second heating element may be planar.

[0122] One or both of the first heating element and the second heating element may be produced by electrodeposition.

[0123] One or more of the first perforations, the second perforations, the third perforations and the fourth perforations may be produced by electrodeposition. One or more of the first perforations, the second perforations, the third perforations, and the fourth perforations may be produced by sintering. Heating elements produced using electrodeposition may have surfaces providing low abrasivity. Using heating elements produced using electrodeposition may decrease the risk of damaging the aerosol-forming substrate or aerosol-generating article during insertion of the substrate or article, respectively, into the device.

[0124] Electrodeposition may refer to an electrochemical process. A metal plate may be used as a master negative. To create a perforated heating element, an electrically insulating material may cover the positions of the intended perforations on the master negative. The part of the master negative not covered by the insulating material may get electroplated in an acid bath with a metal coating (first coating), then may be passivated, for instance with bichromate (second coating). The metal added to the master negative may form the final perforated heating element. The edges of the perforations created by electrodeposition may be rounded. The resulting perforated heating element may have a low abrasivity.

[0125] Electrodeposition may allow to have a great range of shapes and distributions for the perforations. Electrodeposition may allow to adjust the thickness of the coating (impacting the final diameter of the perforations). The porosity and resistance-to-draw (RTD) of the heating element may be controlled with high precision.

[0126] One or both of the first heating element and the second heating element may be a metal foil.

[0127] Perforations may be introduced to the metal foil using a puncturing tool or a laser. Perforations may be introduced to the metal foil by electrodeposition.

[0128] One or more of the first perforations, second perforations, third perforations and fourth perforations may comprise rounded edges. The rounded edges may reduce the risk of damaging the aerosol-forming substrate or aerosol-generating article during insertion into the device.

[0129] One or both of the first heating element and the second heating element may have a rounded downstream end. The rounded downstream end may reduce the risk of damaging the aerosol-forming substrate or aerosol-generating article during insertion into the device. The rounded downstream and may improve the ease of insertion of the aerosol-substrate or aerosol-generating article.

[0130] The device may comprise an air inlet. The device may comprise one or more of a first cavity inlet configured for fluidly connecting the air inlet and the first cavity, a second cavity inlet configured for fluidly connecting the air inlet and the second cavity, a first airflow channel inlet configured for fluidly connecting the air inlet and the first airflow channel and a second airflow channel inlet configured for fluidly connecting the air inlet and the second airflow channel.

[0131] The device may comprise a housing. The air inlet of the device may be an opening in the housing of the device. The device may comprise an airflow distribution channel arranged between the air inlet of the device and one or more of the first cavity inlet, second cavity inlet, first airflow channel inlet and second airflow channel inlet.

[0132] The first aerosol-forming substrate may be inserted into the first cavity via the first cavity inlet. The first aerosol-generating article may be inserted into the first cavity via the first cavity inlet. The second aerosol-forming substrate may be inserted into the second cavity via the second cavity inlet. The second aerosol-generating article may be inserted into the second cavity via the second cavity inlet.

[0133] One or both of the first cavity and the second cavity may have a length of between 10 millimeters and 30 millimeters. One both of the first cavity and the second cavity may have a width of between 7 millimeters and 17 millimeters. One or both of first cavity in the second cavity may have a height of between 1 millimeter and 5 millimeters.

[0134] One or both of the first and the second airflow channel may have a length of between 7 millimeters and 21 millimeters. One or both of the first and the second airflow channel may have a width of between 7 millimeters and 17 millimeters. One or both of the first and the second airflow channel may have a height of between 1.5 millimeters and 3.5 millimeters.

[0135] The device may comprise a mouthpiece. The mouthpiece may comprise a housing. The mouthpiece may be removably connectable to the device. The mouthpiece may be fluidly connected with the first airflow channel via the first airflow channel open end. The mouthpiece may be fluidly connected with the second airflow flow channel via second airflow channel open end. The mouthpiece may be fluidly connected with the first cavity via the first cavity open end. The mouthpiece may be fluidly connected with the second cavity via the second cavity open end. The mouthpiece may comprise an aerosol outlet. The user may inhale aerosol through the aerosol outlet. The aerosol outlet may be fluidly connected with one or more of the first airflow channel, the second flow channel, the first cavity, and the second cavity.

[0136] The mouthpiece may comprise a chamber. The chamber may be fluidly connected with one or more of the first airflow channel, the second flow channel, the first cavity, and the second cavity. The chamber may be in fluidly connected with one or more of the first airflow channel via the first airflow channel open end, the second flow channel via the second airflow channel open end, the first cavity via the first cavity open end, and the second cavity via the second cavity open end. The chamber may be fluidly connected with the aerosol outlet. Air flow from one or more of the first cavity, the second cavity, the first airflow channel, and the second airflow channel may mix in the chamber. The chamber may be cooling chamber. One or both of volatized first-aerosol forming substrate and second aerosol-forming substrate in an airflow entering the chamber may cool inside the chamber to form an aerosol. The chamber may be a mixing chamber. Airflow is from one or more of the first cavity, the second cavity, the first airflow channel and the second airflow channel may mix in the chamber. A homogenised mixture may be obtained.

[0137] The mouthpiece may be arranged downstream of one or more of the first airflow channel, the second flow channel, the first cavity, and the second cavity. The mouthpiece may be arranged at the mouth end. The mouthpiece may be arranged at the downstream end of the device. The mouthpiece may be a hinged mouthpiece.

[0138] The device may comprise a main body. The main body may comprise a controller. The main body may comprise a power supply. The power supply may be a battery. The main body may comprise one or more of the heating arrangement, the first cavity, the second cavity, the first airflow channel, the second flow channel, the first cavity inlet, the second cavity inlet, the first airflow channel inlet and the second airflow channel inlet. Alternatively, one or more of the heating arrangement, the first cavity, the second cavity, the first airflow channel, the second airflow channel, the first cavity inlet, the second cavity inlet, the first airflow channel inlet and the second airflow channel inlet may be arranged an intermediate section. The main body may be configured to be removably attachable to the mouthpiece. The main body may comprise a housing.

[0139] The main body may comprise an interface. The interface may be configured as a data port for transferring data. The interface may be configured to connect to an external energy source for recharging the power supply.

[0140] The mouthpiece may be removed from the main body to insert one or more of the first aerosol-forming substrate, second aerosol-forming substrate, first aerosol-generating article and second aerosol-generating article.

[0141] The intermediate section may comprise a housing. The main body may be configured to be removably attached to an upstream end of the intermediate section. The intermediate section may be configured to be removably attached to an upstream end of the mouthpiece. The mouthpiece may be configured to be removably attached to the downstream end of the intermediate section.

[0142] By providing the removably attachable mouthpiece, the removably attachable intermediate section and the removably attachable main body, the manufacturer may upgrade each part one at a time. By providing the removably attachable mouthpiece, the removably attachable intermediate section and the removably attachable main body, accessibility to one or both of the first cavity and the second cavity may be improved.

[0143] The main body may have a length of between 30 millimeters and 70 millimeters. The main body may have a width of between 12 millimeters and 35 millimeters. The main body may have a height of between 5 millimeters and 15 millimeters.

[0144] The intermediate section may have a length of between 20 millimeters and 45 millimeters. The intermediate section may have a width of between 12 millimeters and 35 millimeters. The intermediate section may have a height of between 5 millimeters and 15 millimeters.

[0145] The mouthpiece may have a length of between 15 millimeters and 40 millimeters. The mouthpiece may have width of between 12 millimeters and 35 millimeters. The mouthpiece may have a height of between 5 millimeters and 15 millimeters.

[0146] In a second aspect, the invention relates to an aerosol-generating system comprising the aerosol-generating device as described herein and a first aerosol-generating substrate.

[0147] According to an embodiment of the invention there is provided an aerosol-generating system, which may comprise the aerosol-generating device as described herein and a first aerosol-generating substrate.

[0148] The first aerosol-generating substrate may be a first planar aerosol-generating substrate. The first cavity may be configured to receiving the first planar aerosol-forming substrate.

[0149] A planar aerosol-forming substrate may be manufactured more efficiently. A planar aerosol-forming substrate may be compact. A planar aerosol-forming substrate may be heated with improved efficiency.

[0150] A planar aerosol-forming substrate may be more compact. Provision of a planar aerosol-forming substrate may improve thermal contact between the heating element and the aerosol-forming substrate.

[0151] Provision of a planar cavity may improve the efficiency of operation of the device. Provision of a planar cavity may improve heating efficiency. A planar cavity may be more compact. Provision of a planar cavity may improve thermal contact between the heating element and the aerosol-forming substrate.

[0152] Provision of a planar heating element may improve the efficiency of operation of the device. Provision of a planar heating element may improve heating efficiency. A planar heating element may be more compact. Provision of a planar heating element may improve thermal contact between the heating element and the aerosol-forming substrate.

[0153] The first aerosol-forming substrate may be cuboid-shaped. The first aerosol-forming substrate may have a rectangular cross-section. The first aerosol-forming substrate may be flat. The first aerosol-forming substrate may be cylindrical. The first aerosol-forming substrate may have a flat cylindrical shape. The first aerosol-forming substrate may have an oval cross section. The first aerosol-forming substrate may be coin-shaped.

[0154] The first aerosol-forming substrate may be porous. The first aerosol-forming substrate may be configured to allow an airflow through the substrate. At least a portion of the airflow through the first cavity may flow through at least a portion of one or both of the first aerosolforming substrate and the first aerosol-generating article. As used herein, a “porous" element may be an element through which air can pass through when the pressure drop applied (resistance to draw) is in the range of between 80 to 130 mm H2O.

[0155] The first aerosol-forming substrate may be configured to be slidable into the first cavity. The first aerosol-generating article may be configured to be slidable into the first cavity.

[0156] The system may comprise a second aerosol-generating substrate. The second aerosol-generating substrate may be a second planar aerosol-generating substrate. The system may comprise a second aerosol-forming substrate. The second aerosol-forming substrate may be a second planar aerosol-forming substrate. The second cavity may be configured for receiving the second planar aerosol-forming substrate.

[0157] The second aerosol-forming substrate may be cuboid-shaped. The second aerosolforming substrate may have a rectangular cross-section. The second aerosol-forming substrate may be flat. The second aerosol-forming substrate may be cylindrical. The second aerosol-forming substrate may be coin-shaped. The second aerosol-forming substrate may have the same shape as the first aerosol-forming substrate.

[0158] The second aerosol-generating substrate may be porous. The second aerosolforming substrate may be configured to allow an airflow through the substrate. At least a portion of the airflow through the second cavity may flow through at least a portion of one or both of the second aerosol-forming substrate and the second aerosol-generating article.

[0159] The second aerosol-forming substrate may be configured to be slidable into the second cavity. The second aerosol-generating article may be configured to be slidable into the second cavity.

[0160] The first aerosol-forming substrate may be configured to provide a first user experience. The second aerosol-forming substrate may be configured to provide a second user experience. The first user experience may be different to the second user experience. Power may be provided to the first induction coil or first resistive heating element to provide the first experience. A first heating profile may be provided to the first induction coil or first resistive heating element. The first heating profile may be adapted to the characteristics of the first aerosol-forming substrate. Power may be provided to the second induction coil or the second resistive heating element to provide the second experience. A second heating profile may be provided to the second induction coil or second resistive heating element. The second heating profile may be adapted to the characteristics of the second aerosol-forming substrate.

[0161] A third user experience may be provided by providing power to both the first induction coil and the second induction coil. A third user experience may be provided by providing power to both the first resistive heating element and the second resistive heating element. The third user experience may be a combination of the first user experience and the second user experience. The third user experience may be tuned by adapting one or both of the first heating profile and the second heating profile. The third user experience may be adapted to the individual preferences of the consumer.

[0162] The first aerosol-forming substrate may be configured to be different from the second aerosol-forming substrate. The first aerosol-generating article may be configured to be different from the second aerosol-generating article.

[0163] The shape of the first aerosol-forming substrate may be different to the shape of the second aerosol-forming substrate. The shape of the first aerosol-generating article may be different to the shape of the second aerosol-generating article.

[0164] By providing differently shaped first substrate and second substrate, the user may readily distinguish between the first substrate and the second subject. By providing differently shaped first article and second article, the user may readily distinguish between the first article and the second article. By providing differently shaped substrates and matching first cavity and second cavity, the risk of the consumer inserting the first substrate into the second cavity or inserting the second substrate into the first cavity may be reduced. By providing differently shaped articles and matching first cavity and second cavity, the risk of the consumer inserting the first article into the second cavity or inserting the second article into the first cavity may be reduced.

[0165] The first aerosol-forming substrate may be configured to be the same as the second aerosol-forming substrate. The first aerosol-generating article may be configured to be the same as the second aerosol-generating article.

[0166] The first aerosol-forming substrate may be shaped to closely conform to the shape of the first cavity. The second aerosol-forming substrate may be shaped to closely conform to the shape of the second cavity.

[0167] The first aerosol-forming substrate may form part of a first aerosol-generating article. The first aerosol-generating article may be a first planar aerosol-generating article. The second aerosol-forming substrate may form part of a second aerosol-generating article. The second aerosol-generating article may be a second planar aerosol-generating article. The first aerosol-generating article may be shaped to closely conform to the shape of the first cavity. The second aerosol-generating article may be shaped to closely conform to the shape of the second cavity.

[0168] The first aerosol-generating article may be cuboid-shaped. The first aerosolgenerating article may have a rectangular cross-section. The first aerosol-generating article may be flat. The first aerosol-generating article may be cylindrical. The first aerosol-forming article may have a flat cylindrical shape. The first aerosol-forming article may have an oval cross section. The first aerosol-forming article may be coin-shaped. The first aerosol- generating article may be porous. The first aerosol-generating article may be configured to allow an airflow through the article.

[0169] The second aerosol-generating article may be cuboid-shaped. The second aerosolgenerating article may have a rectangular cross-section. The second aerosol-generating article may be flat. The second aerosol-generating article may be cylindrical. The second aerosol-forming article may have a flat cylindrical shape. The second aerosol-forming article may have an oval cross section. The second aerosol-generating article may be coin-shaped. The second aerosol-generating article may be porous. The second aerosol-generating article may be configured to allow an airflow through the article.

[0170] An airflow through the first cavity may at least partially flow through an inserted first aerosol-generating article. An airflow through the first cavity may at least partially flow through an inserted first aerosol-forming substrate.

[0171] An airflow through the second cavity may at least partially flow through an inserted second aerosol-generating article. An airflow through the second cavity may at least partially flow through an inserted second aerosol-forming substrate.

[0172] The device may comprise a controller. The first induction coil may be connected to the controller. The second induction coil may be connected to the controller. The controller may be configured to control the first induction coil. The controller may be configured to control the second induction coil. The controller may be configured to control the operation of the first induction coil independently from the operation of the second induction coil. The controller may be configured to control a first power supply to the first induction coil. The controller may be configured to control a second power supply to the second induction coil. The first power supply may be different to the second power supply. The first power supply may be different to the second power supply in terms of one or more of intensity and timing. The controller may be configured to provide a first heating profile to the first induction coil. The controller may be configured to provide a second heating profile to the second induction coil.

[0173] The controller may be connected to the first resistive heating element. The controller may be connected to the second resistive heating element. The controller may be configured to provide power to the first resistive heating element. The controller may be configured to provide power to the second resistive heating element. The controller may be configured to provide power to the first resistive heating element independently from providing power to the second heating element. The power provided to the first resistive heating element may be different to the power provided to the second resistive heating element. The controller may be configured to provide a first heating profile to the first resistive heating element. The controller may be configured to provide a second heating profile to the second resistive heating element. The first heating profile may be different to the second heating profile. The first heating profile may be adapted to the characteristics of the first aerosolforming substrate. The second heating profile may be adapted to the characteristics of the second-forming substrate.

[0174] The invention allows the user to flexibly adapt the user experience. For example, the user may insert a first aerosol-generating article comprising a first aerosol-forming substrate having particular first characteristics, such as first flavour or a first nicotine content, if a user experience having such first characteristic is desired. Alternatively, the user may insert a second aerosol-generating article comprising a second aerosol-forming substrate having particular second characteristics, such as second flavour or a second nicotine content, if the user experience having such second characteristics is desired. Alternatively, if the user desires a combination of the first characteristics and the second characteristics, the user may insert both the first aerosol-generating article and the second aerosol-generating article. The ratio between the first characteristics and the second characteristics may be adjusted by adapting the heating profile of the first heating element and the second heating element. For example, if a user experience having predominantly the first characteristic is desired, one or both of the intensity of the power supply and the length of the power supply to the first induction coil or the first resistive heating element may be increased, while one or both of the intensity of the power supply and the length of the power supply to the second induction coil or the second resistive heating element may be decreased.

[0175] In use, the consumer may insert one or both of the first aerosol-generating article and the second aerosol-generating article in the device. The user may draw on the device to pull in air through the air inlet of the device. The airflow may be distributed between one or more of the first cavity, second cavity, first airflow channel and second airflow channel. Heating elements abutting a cavity may heat the aerosol-forming substrate inserted into the cavity to volatized at least a portion of the substrate. At least a portion of the volatized substrate may flow into the mouthpiece chamber via the cavity open end. Another portion of the volatized substrate may flow into airflow channels abutting heating element via the perforations of the heating element arranged between the cavity and the airflow channel. The volatized substrate may mix in the airflow channel with airflow directly entering the airflow channel via the airflow channel inlet. The distribution and direction of the perforations of the heating elements abutting the airflow channel may adjust the characteristics of the airflow through the airflow channel. The mixture of the airflow channel may flow into the mouthpiece chamber via the airflow channel open end. The different airflows entering the mouthpiece chamber may mix in the chamber. The mixture may cool in the chamber to form an aerosol. The aerosol may be inhaled by the consumer through the aerosol outlet of the mouthpiece.

[0176] When it is referred herein to an angle range of any of the first perforation direction, second perforation direction, third perforation direction and fourth perforation direction, preferably, an angle of about 90° may be excluded. A first perforation direction of about 90° may be excluded. A second perforation direction of about 90° may be excluded. A third perforation direction of about 90° may be excluded. A fourth perforation direction of about 90° may be excluded. For example, a perforation direction angled between 30° and 150° may refer to a perforation direction angled between 30° and below 90° or by between above 90° and 150° For example, a perforation direction angled between 30° and 90° may refer to a perforation direction angled between 30° and below 90°. For example, a perforation direction angled between 90° and 150° may refer to a perforation direction angled between above 90° and 150°.

[0177] The airflow through the airflow channel may refer to the airflow through the airflow channel when the device is in use. The airflow through the airflow channel may refer to the airflow through the airflow channel when a user draws on a proximal end of the device.

[0178] The airflow through the first airflow channel may be directed from a distal end of the first airflow channel to a proximal end of the first airflow channel. The airflow through the second airflow channel may be directed from a distal end of the second airflow channel to a proximal end of the second airflow channel. The net airflow through the first airflow channel may be directed from a distal end of the first airflow channel to a proximal end of the first airflow channel. The net airflow through the second airflow channel may be directed from a distal end of the second airflow channel to a proximal end of the second airflow channel.

[0179] The airflow through the airflow channel may be directed from an upstream end of the airflow channel to a downstream end of the airflow channel. The net airflow through the airflow channel may be directed from an upstream end of the airflow channel to a downstream end of the airflow channel.

[0180] A longitudinal axis of a component may be an axis along or parallel to the lengthwise direction of the component. A longitudinal axis of the device may extend between the distal end and the proximal end of the device. A longitudinal axis of the first heating element may extend between the distal end in the proximal end of the first heating element. A longitudinal axis of the second heating element may extend between the distal end in the proximal end of the second heating element. A longitudinal axis of the first airflow channel may extend between the distal end and the proximal end of the first airflow channel. A longitudinal axis of the second airflow channel may extend between the distal end and the proximal end of the second airflow channel.

[0181] A longitudinal axis of the first heating element may extend between the distal end and the proximal end of the first heating element. A longitudinal axis of the second heating element may extend between the distal end and the proximal end of the second heating element. As used herein, the terms ‘proximal’, ‘distal’, ‘downstream’ and ‘upstream’ are used to describe the relative positions of components, or portions of components, of the aerosolgenerating device in relation to the direction in which a user draws on the aerosol-generating device during use thereof.

[0182] The aerosol-generating device may comprise a mouth end through which in use an aerosol exits the aerosol-generating device and is delivered to a user. The mouth end may also be referred to as the proximal end. In use, a user draws on the proximal or mouth end of the aerosol-generating device in order to inhale an aerosol generated by the aerosolgenerating device. The aerosol-generating device comprises a distal end opposed to the proximal or mouth end. The proximal or mouth end of the aerosol-generating device may also be referred to as the downstream end and the distal end of the aerosol-generating device may also be referred to as the upstream end. Components, or portions of components, of the aerosol-generating device may be described as being upstream or downstream of one another based on their relative positions between the proximal, downstream or mouth end and the distal or upstream end of the aerosol-generating device.

[0183] As used herein, an ‘aerosol-generating device’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article. An aerosolgenerating device may be a smoking device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth. An aerosol-generating device may be a holder. The device may be an electrically heated smoking device. The aerosol-generating device may comprise a housing, electric circuitry, a power supply and a heating arrangement.

[0184] As used herein with reference to the present invention, the term ‘smoking’ with reference to a device, article, system, substrate, or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is fully or at least partially combusted. The aerosol-generating device of the present invention is arranged to heat the aerosol-forming substrate to a temperature below a combustion temperature of the aerosol-forming substrate, but at or above a temperature at which one or more volatile compounds of the aerosolforming substrate are released to form an inhalable aerosol.

[0185] The aerosol-generating device may comprise electric circuitry. The electric circuitry may comprise a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of the controller. The electric circuitry may comprise further electronic components. The electric circuitry may be configured to regulate a supply of power to the heating arrangement. Power may be supplied to the heating arrangement continuously following activation of the aerosol-generating device or may be supplied intermittently, such as on a puff-by-puff basis. The power may be supplied to the heating arrangement in the form of pulses of electrical current. The electric circuitry may be configured to monitor the electrical resistance of one or both of the first heating element and the second heating element, and preferably to control the supply of power to one or both of the first heating element and the second heating element dependent on the electrical resistance of the first heating element and the second heating element.

[0186] The aerosol-generating device may comprise a power supply, typically a battery, within the main body of the aerosol-generating device. In one embodiment, the power supply is a Lithium-ion battery. Alternatively, the power supply may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium-lron-Phosphate, Lithium Titanate or a Lithium-Polymer battery. The power supply may be a Lithium-ion polymer battery. As an alternative, the power supply may be another form of charge storage device such as a capacitor. The power supply may be a supercapacitor. The power supply may be a hyper-capacitor. The power supply may require recharging and may have a capacity that enables to store enough energy for one or more usage experiences; for example, the power supply may have sufficient capacity to continuously generate aerosol for a period of around six minutes or for a period of a multiple of six minutes. In another example, the power supply may have sufficient capacity to provide a predetermined number of puffs or discrete activations of the heating element.

[0187] The first cavity open end may be a proximal end. The second cavity open end may be a proximal end. The first cavity may comprise a base opposite to the first cavity open end. The second cavity may comprise a base opposite to the second cavity open end. The first cavity base may be closed except for the provision of the first cavity inlet arranged at the base. The second cavity base may be closed except for the provision of the second cavity inlet arranged at the base. The first cavity base may be flat. The second cavity base may be flat. The first cavity base may be rectangular. The second cavity base may be rectangular. The first cavity base may be arranged upstream of the first cavity. The second cavity base may be arranged upstream of the second cavity. The first cavity open end may be arranged downstream of the first cavity. The second cavity open end may be arranged downstream of the second cavity. The first cavity may have an elongate extension. The second cavity may have an elongate extension. The first cavity may have a longitudinal central axis. The second cavity may have a longitudinal central axis. A longitudinal direction may be the direction extending between the base and the open end along the longitudinal central axis. The longitudinal central axis of the first cavity may be parallel to the longitudinal axis of the aerosol-generating device.

[0188] The first cavity may be configured as a heating chamber. The second cavity may be configured as a heating chamber. The first cavity may have a hollow rectangular shape. The second cavity may have a hollow rectangular shape. The first cavity may have a shape corresponding to the shape of the first aerosol-generating article to be received in the first cavity. The second cavity may have a shape corresponding to the shape of the second aerosol-generating article to be received in the second cavity. The first cavity may have an inner diameter corresponding to the outer diameter of the first aerosol-generating article. The first cavity may have an inner diameter corresponding to the outer diameter of the first aerosol-forming substrate. The second cavity may have an inner diameter corresponding to the outer diameter of the second aerosol-generating article. The second cavity may have an inner diameter corresponding to the outer diameter of the second aerosol-forming substrate.

[0189] The heating arrangement may be a resistive heating arrangement. One above of the first heating element and the second heating element may comprise an electrically resistive material. Suitable electrically resistive materials include but are not limited to: semiconductors such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material. Such composite materials may comprise doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum platinum, gold and silver. Examples of suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese-, gold- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetai® and iron-manganese-aluminium based alloys. In composite materials, the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required.

[0190] The heating arrangement may be an induction heating arrangement. The induction heating arrangement may comprise the first induction coil and the first heating element. The induction heating arrangement may comprise the second induction coil and the second heating element. The induction heating arrangement may comprise the first induction coil, the second induction coil, the first heating element and the second heating element.

[0191] One or both of the first heating element and the second heating element may be a susceptor. One both of the first heating element and the second heating element may be a material that is capable of generating heat, when penetrated by an alternating magnetic field. The first induction coil may generate an alternating magnetic field in the first cavity. The first induction coil may generate an alternating magnetic field penetrating the first heating element. The second induction coil may generate an alternating magnetic field in the second cavity. The second induction coil may generate an alternating magnetic field penetrating the second heating element. If one or both of the first heating element and the second heating element is conductive, then typically eddy currents are induced by the alternating magnetic field. If one or both of the first heating element and the second heating element is magnetic, then typically another effect that contributes to the heating is commonly referred to hysteresis losses. Hysteresis losses occur mainly due to the movement of the magnetic domain blocks within the one or both of first heating element and the second heating element, because the magnetic orientation of these will align with the magnetic induction field, which alternates. Another effect contributing to the hysteresis loss is when the magnetic domains will grow or shrink within the one or both of the first heating element at the second heating element. Commonly all these changes in the one or both of the first heating element and the second heating element that happen on a nano-scale or below are referred to as “hysteresis losses”, because they produce heat in the one or both of the first heating element and the second heating element. Hence, if the one or both of the first heating element and the second heating element is both magnetic and electrically conductive, both hysteresis losses and the generation of eddy currents will contribute to the heating of the one or both of the first heating element and the second heating element. If the one or both of the first heating element and the second heating element is magnetic, but not conductive, then hysteresis losses will be the only means by which the one or both of the first heating element and the second heating element will heat, when penetrated by an alternating magnetic field. According to the invention, the one or both of the first heating element and the second heating element may be electrically conductive or magnetic or both electrically conductive and magnetic. An alternating magnetic field generated by the first induction coil may heat the first heating element, which then transfers the heat to the first aerosol-forming substrate. An alternating magnetic field generated by the second induction coil may heat the second heating element, which then transfers the heat to the second aerosol-forming substrate. The heat transfer may be mainly by conduction of heat. Such a transfer of heat is best, if the one above of the first heating element and the second heating element is in close thermal contact with the aerosolforming substrate.

[0192] As used herein, the term ‘aerosol-generating article’ refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth. An aerosolgenerating article may be disposable.

[0193] As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate. An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article. The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosolforming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds which are released from the substrate upon heating. The aerosol-forming substrate may comprise nicotine. The aerosol-forming substrate may comprise a nontobacco material. The aerosol-forming substrate may comprise an aerosol former that facilitates the formation of a dense and stable aerosol. Examples of suitable aerosol formers are glycerine and propylene glycol. The aerosol-forming substrate may be a liquid aerosolforming substrate. The aerosol-forming substrate may comprise flavouring. The aerosolforming substrate may comprise botanicals. The aerosol-forming substrate may comprise cannabis for therapeutic use.

[0194] The invention is defined in the claims. However, below there is provided a non- exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0195] Example 1: An aerosol-generating device comprising a first cavity configured for receiving a first aerosol-forming substrate, a first airflow channel, and a heating arrangement comprising at least a first heating element, wherein the first heating element comprises at least two or more first perforations, wherein each of the first perforations extends along a first perforation direction, wherein the first perforation direction is angled with respect to a longitudinal axis of the first heating element, wherein the first heating element is arranged between the first cavity and the first airflow channel, wherein the heating element is arranged abutting the first cavity and the first airflow channel, wherein the first perforation is configured for fluidly connecting the first cavity with the first airflow channel.

[0196] Example 2: The aerosol-generating device according to example 1, wherein the longitudinal axis of the first heating element is arranged parallel to a longitudinal axis of the aerosol-generating device.

[0197] Example 3: The aerosol-generating device according to any of the preceding examples, wherein the first perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 150°

[0198] Example 4: The aerosol-generating device according to any of the preceding examples, wherein the first heating element comprises at least two or more second perforation, wherein the second perforations extend along a second perforation direction, wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element, wherein the second perforations are configured for fluidly connecting the first cavity with the airflow channel. Example 5: The aerosol-generating device according to example 4, wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 150°

[0199] Example 6: The aerosol-generating device according to any examples 4 and 5, wherein the first perforation direction is the same as the second perforation direction.

[0200] Example 7: The aerosol-generating device according to any examples 4 and 5, wherein the first perforation direction is different to the second perforation direction.

[0201] Example 8: The aerosol-generating device according to any of examples 4 to 7, wherein the second perforations are arranged proximal to the first perforations.

[0202] Example 9: The aerosol-generating device according to example 8, wherein the first perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 90°, and wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element by between 90° and 150°.

[0203] Example 10: The aerosol-generating device according to any of the preceding examples, wherein the heating arrangement comprises a second heating element, wherein the second heating element comprises at least two or more third perforations, wherein each of the third perforations extends along a third perforation direction, wherein the third perforation direction is angled with respect to a longitudinal axis of the second heating element.

[0204] Example 11: The aerosol-generating device according to example 10, wherein the longitudinal axis of the second heating element is arranged parallel to a longitudinal axis of the aerosol-generating device.

[0205] Example 12: The aerosol-generating device according to any of examples 10 and 11 , wherein the third perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 150°

[0206] Example 13: The aerosol-generating device according to any of examples 10 to 12, wherein the second heating element comprises at least two or more fourth perforation, wherein each of the fourth perforations extends along a fourth perforation direction, wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element.

[0207] Example 14: The aerosol-generating device according to example 13, wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 150°.

[0208] Example 15: The aerosol-generating device according to any of examples 13 and 14, wherein the third perforation direction is the same as the fourth perforation direction.

[0209] Example 16: The aerosol-generating device according to any of examples 13 and 14, wherein the third perforation direction is different to the fourth perforation direction. Example 17: The aerosol-generating device according to any of examples 13 to 16, wherein the fourth perforations are arranged proximal to the third perforations.

[0210] Example 18: The aerosol-generating device according any of examples 13 to 17, wherein the third perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 90°, and wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element by between 90° and 150°

[0211] Example 19: The aerosol-generating device according to any of examples 13 to 18, wherein the device comprises a second airflow channel, wherein the second heating element is arranged between the first cavity and the second airflow channel, wherein the second heating element is arranged abutting the first cavity and the second airflow channel, wherein one or both of the third perforations and the fourth perforations are configured for fluidly connecting the first cavity with the second airflow channel.

[0212] Example 20: The aerosol-generating device according to any example 13 to 18, wherein the device comprises a second cavity configured for receiving a second aerosolforming substrate, wherein the second heating element is arranged between the second cavity and the first airflow channel, wherein the second heating element is arranged abutting the second cavity and the first airflow channel, wherein one or both of the third perforations and the fourth perforations are configured for fluidly connecting the second cavity with the first airflow channel.

[0213] Example 21: The aerosol-generating device according to any example 13 to 18, wherein the device comprises a second cavity configured for receiving a second aerosolforming substrate, wherein the device comprises a second airflow channel, wherein the second heating element is arranged between the second cavity and the second airflow channel, wherein the second heating element is arranged abutting the second cavity and the second airflow channel, wherein one or both of the third perforations and the fourth perforations are configured for fluidly connecting the second cavity with the second airflow channel.

[0214] Example 22: The aerosol-generating device according to any of the preceding examples, wherein one or both of the first heating element and the second heating element is a resistive heating element.

[0215] Example 23: The aerosol-generating device according to any of examples 1 to 21, wherein the heating arrangement comprises a first planar induction coil, wherein the first planar induction coil is configured abutting the first cavity.

[0216] Example 24: The aerosol-generating device according to any of examples 1 to 18, 20, 21 and 23, wherein the heating arrangement comprises a second planar induction coil, wherein the second planar induction coil is configured abutting the second cavity. Example 25: The aerosol-generating device according to any of the preceding examples, wherein one or both of the first heating element and the second heating element are planar.

[0217] Example 26: The aerosol-generating device according to any preceding examples, wherein one or both of the first heating element and the second heating element is produced by electrodeposition.

[0218] Example 27: The aerosol-generating device according to any of the preceding examples, wherein one or both of the first heating element and the second heating element is a metal foil.

[0219] Example 28: The aerosol-generating device according to any of the preceding examples, wherein the proximal end of one or both of the first heating element and the second heating element are rounded.

[0220] Example 29: The aerosol-generating device according to any of the preceding examples, wherein the one or more of the first perforations, second perforations, third perforations and fourth perforations comprise rounded edges.

[0221] Example 30: The aerosol-generating device according to any of the preceding examples, wherein the device comprises an air inlet, wherein the device comprises one or more of a first cavity inlet fluidly connecting the air inlet and the first cavity, a second cavity inlet fluidly connecting the air inlet and the second cavity, a first airflow channel inlet fluidly connecting the air inlet and the first airflow channel and a second airflow channel inlet fluidly connecting the air inlet and the second airflow channel.

[0222] Example 31: An aerosol-generating system comprising the aerosol-generating device according to any of examples 1 to 30 and a first aerosol-generating substrate, preferably a first planar aerosol-generating substrate.

[0223] Example 32: The aerosol-generating system according to example 31, wherein the first aerosol-generating substrate is porous.

[0224] Example 33: The aerosol-generating system according to any of examples 31 and 32 comprising the device of any of examples 20 to 30, wherein the system comprises a second aerosol-generating substrate, preferably a second planar aerosol-generating substrate.

[0225] Example 34: The aerosol-generating system according to example 33, wherein the second aerosol-generating substrate is porous.

[0226] Example 35: The aerosol-generating system according to any of examples 33 and 34, wherein the first aerosol-forming substrate is configured to be different from the second aerosol-forming substrate.

[0227] Example 36: The aerosol-generating system according to any of examples 33 and 34, wherein the first aerosol-forming substrate is configured to be the same as the second aerosol-forming substrate. Example 37: The aerosol-generating system according to any of examples 33 to 36, wherein the first aerosol-forming substrate is shaped to closely conform to the shape of the first cavity and wherein the second aerosol-forming substrate is shaped to closely conform to the shape of the second cavity.

[0228] Example 38: The aerosol-generating system according to any of examples 33 to 37, wherein the first aerosol-forming substrate forms part of a first aerosol-generating article, preferably wherein the first planar aerosol-generating article and wherein the second aerosolforming substrate forms part of a second aerosol-generating article, preferably a second planar aerosol-generating article, preferably wherein first aerosol-generating article is shaped to closely conform to the shape of the first cavity and wherein the second aerosol-generating article is shaped to closely conform to the shape of the second cavity.

[0229] Example 39: A heating element produced by electrodeposition, wherein the heating element comprises at least two or more first perforations, wherein each of the first perforations extends along a first perforation direction, wherein the first perforation direction is angled with respect to a longitudinal axis of the heating element.

[0230] Example 40: A method for producing a heating element comprising at least two or more perforations comprising the following steps:

[0231] (a) providing a master negative,

[0232] (b) applying electrically insulating material to the master negative at positions of intended perforations,

[0233] (c) electroplating the master negative with a metal coating.

[0234] Below, there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0235] Features described in relation to one embodiment may equally be applied to other embodiments of the invention.

[0236] The invention will be further described, by way of example only, with reference to the accompanying drawings in which:

[0237] Fig. 1 shows an aerosol generating system of the invention;

[0238] Fig. 2 shows a layered view of components of the aerosol-generating system of the invention;

[0239] Fig. 3 shows a modular embodiment of the aerosol-generating device of the invention;

[0240] Fig. 4 shows a magnified view of an intermediate section of Fig. 3 Fig. 5 shows an embodiment of the aerosol-generating system of the invention using a resistive heating arrangement;

[0241] Fig. 6 shows an embodiment of the aerosol-generating system of the invention using an induction heating arrangement;

[0242] Fig. 7 shows the embodiment of the aerosol-generating system of the invention using an induction heating arrangement;

[0243] Fig. 8 shows a magnification of the aerosol-generating device;

[0244] Fig. 9 shows an aerosol-generating article and a heating element with rounded edges and rounded downstream end.

[0245] Fig 1 shows a simplified illustration of an aerosol-generating system 100. System 100 comprises an aerosol-generating device 102. Device 102 comprises a main body 104. Device 102 comprises a first cavity 106. Device 102 comprises a second cavity 108. Device 102 comprises a first airflow channel 110. Device 102 comprises a mouthpiece 112. Device 102 comprises an air inlet 114.

[0246] First cavity 106 abuts first airflow channel 110. Second cavity 108 abuts first airflow channel 110. First airflow channel 110 is sandwiched between first cavity 106 and second cavity 108.

[0247] System 100 comprises a first aerosol-generating article 116 comprising a first aerosol forming substrate. System 100 comprises a second aerosol-generating article 118 comprising a second aerosol-forming substrate. First aerosol-generating article 116 may be different to second aerosol-generating article 118. For example, first aerosol-generating article 116 may comprise a different aerosol-forming substrate than second aerosolgenerating article 118. First aerosol-generating article 116 may be inserted into first cavity 106 as indicated by an arrow. Second aerosol-generating article 118 may be inserted into second cavity 108 as indicated by an arrow.

[0248] Mouthpiece 112 is a hinged mouthpiece. Mouthpiece 112 may be moved between a first position and a second position. Fig. 1 shows the first position of mouthpiece 112, in which mouthpiece 112 is arranged to allow aerosol-generating articles to be inserted into the device 102. Once one or both of first aerosol-generating article 116 and second aerosolgenerating article 118 is inserted into the device 102, the mouthpiece 112 may be moved into second position in which mouthpiece 112 engages with the downstream end of aerosolgenerating device 102.

[0249] In the second position, mouthpiece 112 abuts the downstream end of main body 104 of device 102. In the second position, mouthpiece 112 is fluidly connected the first cavity 106, the second cavity 108, and the first airflow channel 110. Device 102 comprises a perforated a first heating element (not shown). Device 102 comprises a perforated second heating element (not shown).

[0250] In use, the user may draw on mouthpiece 112 to draw air into air inlet 114. The drawn air may be distributed between first cavity 106, second cavity 108, and first airflow channel 110. The airflow through first cavity 106 may partially enter first aerosol-generating article 116. The airflow through second cavity 108 may partially enter second aerosol-generating article 118. The first heating element may heat the inserted first aerosol-forming substrate. The first heating element may at least partially volatize the first aerosol-forming substrate. Additionally or alternatively, the second heating element may heat the inserted second aerosol-forming substrate. The second heating element may at least partially volatize the inserted second aerosol-forming substrate.

[0251] Volatized first aerosol-forming substrate may flow into first airflow channel 110 via the perforated first heating element. Volatized first aerosol-forming substrate may directly flow into mouthpiece 112. Volatized second aerosol-forming substrate may flow into first airflow channel 110 by the perforated second heating element. Volatized second aerosol-forming substrate may directly flow into mouthpiece 112. Volatized first aerosol-forming substrate and volatized second-aerosol forming substrate mix in first airflow channel 110 with air directly drawn into first airflow channel 110 through air inlet 114. Such mixture may flow from airflow channel 110 into mouthpiece 112. Aerosol may be inhaled through mouthpiece 112.

[0252] Fig. 2 shows a staggered view of an arrangement of components of the invention. The components form a stack which may be included in an intermediate section or main body 104 of device 102. The stack comprises, from top to bottom, a first planar induction coil 120, first planar cavity 106, a planar first perforated induction heating element 122, first planar airflow channel 110, a planar second perforated induction heating element 124, second planar cavity 108 and a second planar induction coil 126.

[0253] First cavity 106 comprises an open end 128. Airflow channel 110 comprises an open end 130. Second cavity 108 comprises an open end 132. First cavity 106 may be fluidly connected with mouthpiece 112 via open end 128 of first cavity 106. Second cavity 108 made fluidly connected with mouthpiece 112 via open end 132 of second cavity 108. Airflow channel 110 may be in fluidly connected with mouthpiece 112 via open end 130 of airflow channel 110.

[0254] Fig. 3 shows a modular aerosol-generating device 102. Device 102 comprises main body 104. Device 102 comprises mouthpiece 112. Device 102 comprises an intermediate section 134.

[0255] Main body 104 comprises a controller 136. Main body 104 comprises a power supply 138. Controller 136 may be configured to supply intermediate section 134 with power from power supply 138. Main body 104 comprises a housing 140. Main body 104 comprises an interface 142, which may be a data port or an interface for connecting an external energy source to recharge power supply 138.

[0256] Mouthpiece 112 comprises a housing 144. Mouthpiece 112 comprises a chamber 146. Mouthpiece 112 comprises an aerosol outlet 148.

[0257] Device 102 is shown to be disassembled. Main body 104 may be removably connected to the upstream end of intermediate section 134 as indicated by arrow 150. Intermediate section 134 may be removably connected to the upstream end of mouthpiece 112 as indicated by arrow 152. The details of intermediate section 134 are shown in Fig. 4.

[0258] Fig. 4 shows the details of intermediate section 134 of Fig. 3. Intermediate section 134 comprises first planar heating coil 120. Intermediate section 134 comprises second planar heating coil 126. Intermediate section 134 comprises first planar cavity 106. Intermediate section 134 comprises second planar cavity 108. Intermediate section 134 comprises first planar heating element 122. First planar heating element 122 is an induction heating element. Intermediate section 134 comprises second planar heating element 124. Second planar heating element 124 is an induction heating element. Intermediate section comprises airflow channel 110.

[0259] First heating element 122 comprises first perforations 154. First perforations 154 are angled with respect to a longitudinal axis of first heating element 122 at an angle of between 90° and 150°. All first perforations 154 extend in the same first perforation direction.

[0260] The first perforation direction of first perforations 154 partially points towards a downstream end of the airflow channel 110. First perforations 154 are obliquely angled.

[0261] Second heating element 124 comprises third perforations 156. Third perforations 156 are angled with respect to a longitudinal axis of second heating element 124 at an angle of between 90° and 150°. All third perforations 156 extend in the same the perforation direction.

[0262] The third perforation direction of third perforations 156 partially points towards the downstream end of the airflow channel 110. Third perforations 156 are obliquely angled.

[0263] First cavity 106 comprises open end 128. Second cavity 108 comprises open end 132. First airflow channel 110 comprises open end 130.

[0264] Intermediate section 134 comprises air inlet 114. Intermediate section 134 comprises a first cavity inlet 160. Intermediate section 134 comprises a second cavity inlet 162. Intermediate section 134 comprises an airflow channel inlet 164. Intermediate section 134 comprises housing 166. Air inlet 114 may be in housing 166.

[0265] In use, first aerosol-generating article 116 comprising a first aerosol-forming substrate may be inserted into first cavity 106. Additionally or alternatively, second aerosol-generating article 118 comprising a second aerosol-forming substrate may be inserted into second cavity 108. Main body 104 may be connected to intermediate section 134 and intermediate section 134 may be connected to mouthpiece 112 to obtain an assembled aerosolgenerating system.

[0266] In use, the user may draw on aerosol outlet 148 of mouthpiece 112, such that air enters air inlet 114. The airflow through air inlet 114 may be distributed between first cavity inlet 160, second cavity inlet 162, and airflow channel inlet 164.

[0267] The airflow through first cavity inlet 160 enters first cavity 106. The airflow through second cavity inlet 162 enters second cavity 108. The airflow through air flow channel inlet 164 enters airflow channel 110.

[0268] A portion of the airflow through the cavity 106 enters airflow channel 110 via first perforations 154. As first perforations 154 are angled between 90° and 150°, the airflow in airflow channel 110 towards the downstream end of the device 102 is accelerated. A portion of the airflow through first cavity 106 enters mouthpiece 112 via open end 128.

[0269] As first perforations 154 partially point towards the downstream end of airflow channel 110, the airflow through airflow channel 110 towards the downstream end of the device 102 is accelerated. The airflow is improved. The aerosol delivery is improved.

[0270] A portion of the airflow through second cavity 108 enters first airflow channel 110 via third perforations 156. As third perforations 156 are angled between 90° and 150°, the airflow in first airflow channel 110 towards the downstream end of the device 102 is accelerated. A portion of the airflow through second cavity 108 enters mouthpiece 112 via open end 132.

[0271] As third perforations 156 partially point towards the downstream end of airflow channel 110, the airflow through airflow channel 110 towards the downstream end of the device 102 is accelerated. The airflow is improved. The aerosol delivery is improved.

[0272] The airflow through first airflow channel 110 enters mouthpiece 112 through open end 130.

[0273] Fig. 5 shows a portion of aerosol-generating system 100 of the invention. System 100 comprises device 102 (only a portion of device 102 is shown). The device 102 comprises first planar heating element 122. First planar heating element 122 is a resistive heating element. Device 102 comprises second planar heating element 124. Second planar heating element 124 is a resistive heating element. Device 102 comprises first aerosol-generating article 116 comprising a first aerosol-forming substrate. First aerosol-generating article 116 is inserted into the first cavity 106. First cavity 106 is arranged between first heating element 122 and second heating element 124. First heating element 122 is in contact with first aerosolgenerating article 116. Second heating element 124 is in contact with first aerosol-generating article 116.

[0274] Device 102 comprises first airflow channel 110. First heating element 122 abuts first airflow channel 110. Device 102 comprises second airflow channel 168. Second airflow channel 168 comprises an open end 170. Second heating element 124 abuts second airflow channel 168.

[0275] First heating element 122 comprises first perforations 154. First perforations 154 fludily connect first cavity 106 with first airflow channel 110. First perforations 154 are angled with respect to a longitudinal axis of first heating element 122 at an angle of between 90° and 150°. All first perforations 154 extend in the same first perforation direction.

[0276] The first perforation direction of first perforations 154 partially points towards a downstream end of the first airflow channel 110. First perforations 154 are obliquely angled.

[0277] Second heating element 124 comprises third perforations 156. Third perforations 156 fluidly connect first cavity 106 with second airflow channel 168. Third perforations 156 are angled with respect to a longitudinal axis of second heating element 124 at an angle of between 90° and 150°. All third perforations 156 extend in the same perforation direction.

[0278] The third perforation direction of third perforations 156 partially points towards the downstream end of the second airflow channel 168. Third perforations 156 are obliquely angled.

[0279] First heating element 122 is arranged radially outward of the first cavity 106. Second heating element 124 is arranged radially outward of first cavity 106. First airflow channel 110 is arranged radially outward of first heating element 122. Second airflow channel 168 is arranged radially outward of second heating element 124.

[0280] In use, the consumer draws on aerosol outlet 148 of mouthpiece 112, such that air enters device 102 via air inlet 114. The airflow is distributed between first airflow channel inlet 164, a second airflow channel inlet 174 and first cavity inlet 160 via an airflow distribution channel 172 as indicated by the arrows 176.

[0281] A portion of the airflow enters first airflow channel 110 via first airflow channel inlet 164. A portion of the airflow enters second airflow channel 168 via second airflow channel inlet 174. A portion of the airflow enters first cavity 106 via first cavity inlet 160.

[0282] Controller 136 may provide power to one or both of first heating element 122 and second heating element 124. One or both of first heating element 122 and second heating element 124 heat the aerosol-forming substrate of the inserted aerosol-generating article 116 to volatize at least a portion of the aerosol-forming substrate. At least a portion of airflow through first cavity inlet 160 flow through at least a portion of article 116 inserted into cavity 106.

[0283] At least a portion of the volatized aerosol-forming substrate may flow into first airflow channel 110 via first perforations 154. The volatized aerosol-forming substrate may mix with the airflow through first airflow channel 110 in the first airflow channel 110. At least a portion of the volatized aerosol-forming substrate may flow into second airflow channel 168 via third perforations 156. The volatized aerosol-forming substrate may mix with the airflow through second airflow channel 168 in second airflow channel 168. As first perforations 154 are angled towards a downstream direction, the airflow through first airflow channel 110 towards mouthpiece 112 is accelerated. As third perforations 156 are angled towards the downstream direction, the airflow towards mouthpiece 112 through second airflow channel 168 is accelerated.

[0284] The airflow with the volatized substrate through first airflow channel 110 enters chamber 146 of mouthpiece 112 via open end 130 of the first airflow channel 110. The airflow with the volatized substrate through second airflow channel 168 enters chamber 146 of mouthpiece 112 via open end 170 of second airflow channel 168. A portion of the volatized substrate enters chamber 146 of mouthpiece 112 via open end 128 of first cavity 106.

[0285] The airflow from the first airflow channel 110, the first cavity, and the second airflow channel 168 mix in the chamber 146. The mixing may improve aerosol quality. The mixing may improve homogeneity of the aerosol. The consumer may inhale the aerosol through aerosol outlet 148.

[0286] Fig. 6 shows an embodiment of aerosol-generating system 100 of the invention using an induction heating arrangement.

[0287] System 100 comprises device 102. The device 102 comprises first planar airflow channel 110. Device 102 comprises first planar heating element 122. System 100 comprises first planar aerosol-generating article 116 comprising a first aerosol-forming substrate inserted into first cavity 106. Device 102 comprises first planar induction coil 120. The induction heating arrangement comprises first heating element 122 and first induction coil 120. Induction heating coil 120 comprises shielding 178. First heating element 122 is an induction heating element.

[0288] First heating element 122 is in thermal contact with first aerosol-generating article 116. First aerosol-generating article 116 is arranged between first heating element 122 and first induction coil 120. First heating element 122 lines first airflow channel 110.

[0289] First heating element 122 comprises first perforations 154. First perforations 154 are angled towards the downstream end of the device 102. First perforations 154 fluidly connect first aerosol-generating article 116 with first airflow channel 110.

[0290] In use, the user may draw on aerosol outlet 148 to pull in air through air inlet 114. The airflow is distributed between first airflow channel inlet 164 and the first cavity inlet 160.

[0291] First induction coil 120 may generate an alternating magnetic field penetrating first heating element 122. First induction coil 120 may heat first heating element 122. First heating element 122 is in thermal contact with first aerosol-generating article 116. First heating element 122 heats first aerosol-forming substrate to volatize at least a portion of the first aerosol-forming substrate. At least a portion of the volatized first aerosol-forming substrate flows radially outward into first airflow channel 110 via first perforations 154. The flow of volatized first aerosolforming substrate mixes with the airflow entering first airflow channel 110 via first airflow channel inlet 164.

[0292] At least a portion of the volatized first aerosol-forming substrate may flow from first aerosol-generating article 116 into chamber 146 of mouthpiece 112 via first cavity open end 128. The mixture of volatized first aerosol-forming substrate entering first airflow channel 110 via first perforations 154 and the airflow entering first airflow channel 110 via first airflow channel inlet 164 flows into chamber 146 via first airflow channel open end 130.

[0293] Volatized first aerosol-forming substrate directly entering the chamber 148 via first cavity open end 128 and the mixed airflow entering chamber 148 via first airflow channel open end 130 mix in the chamber. Such mixture may have improved homogeneity. Such mixture may cool in the chamber 146 to form an aerosol. The consumer may inhale the aerosol via aerosol outlet 148.

[0294] Fig. 7 shows aerosol-generating system 100 of the invention using an induction heating arrangement. System 100 comprises modular device 102 as shown in Fig. 3 and Fig. 4 in an assembled state. System 100 of Fig. 7 comprises inserted first aerosol-generating article 116 and inserted second aerosol-generating article 118. First aerosol-generating article 116 comprises a first aerosol-forming substrate. Second aerosol-generating article 118 comprises a second aerosol-forming substrate.

[0295] First heating element 122 is in intimate contact with first aerosol-generating article 116. Second heating element 124 is in intimate contact with second aerosol-generating article 118. First induction coil 120 may generate an alternating magnetic field penetrating first heating element 122. First induction coil 120 may heat first heating element 122. Second induction coil 126 may generate an alternating magnetic field penetrating second heating element 124. Second induction coil 126 may heat second heating element 124. First heating element 122 may heat the first aerosol-forming substrate to volatize at least a portion of the first aerosol-forming substrate. Second heating element 124 may heat the second aerosolforming substrate to volatize at least a portion of the second-forming substrate.

[0296] First induction coil 120 may be operated independently of second induction coil 126. First induction coil 120 may be provided with a first heating profile. Second induction coil 126 may be provided with a second heating profile. The first heating profile and the second heating may be different. The first heating profile may be adapted to the characteristics of first aerosol-generating article 116. The second heating profile may be adapted to the characteristics of second aerosol-generating article 118.

[0297] At least a portion of the volatized first aerosol-forming substrate may flow into first airflow channel 110 via first perforations 154. At least a portion of the volatized second aerosol-forming substrate may flow into first airflow channel 110 via third perforations 156. Volatized first aerosol-forming substrate, volatized second aerosol-forming substrate and airflow entering first airflow channel 110 through first airflow channel inlet 164 mix in first airflow channel 110. Such mixture may flow from first airflow channel 110 into chamber 146 via first airflow channel open end 130.

[0298] At least a portion of the volatized first aerosol-forming substrate may flow into chamber 146 of mouthpiece 112 via first cavity open end 128. At least a portion of the volatized second aerosol-forming substrate may flow into chamber 146 via second cavity open end 132.

[0299] The airflows from first cavity 106 via first cavity open end 128, second cavity 108 via second cavity open end 132 and airflow channel 110 via first airflow channel open end 130 mix in chamber 146. The mixture may cool in the chamber 146 to produce an aerosol. The user may inhale the aerosol via aerosol outlet 148.

[0300] System 100 enables adjusting the delivered aerosol. For example, the first aerosolforming substrate may have first particular characteristic, such as a first flavour or first nicotine content, and the second aerosol-forming substrate may have second particular characteristic such as the second flavour or a second nicotine content. The power provided to the first induction 120 coil may be varied to produce a varied amount of volatized first aerosol-forming substrate. The power provided to the second induction coil 126 may be varied to produce a varied amount of volatized second aerosol-forming substrate.

[0301] For example, if the user wishes to have an aerosol reflecting the characteristics of only the first aerosol-forming substrate, power may only be provided to first induction coil 120, such that only the first aerosol-forming substrate is volatized. If the user wishes to have an aerosol reflecting the characteristics of only the second aerosol-forming substrate, power may only be provided to second induction coil 126, such that only the second aerosolforming substrate is volatized. If the user wishes to have a blend of the characteristics of the first aerosol-forming substrate and the second aerosol-forming substrate in a particular ratio, power may be provided to both, first coil 120 and second coil 126, such that the desired ratio is achieved.

[0302] Fig. 8 shows a magnification of aerosol-generating system 100. The above remarks concerning in particular Fig. 5 and Fig. 6 apply correspondingly. However, first heating element 122 comprises first perforations 154 and second perforations 180. First perforations 154 extend in a first perforation direction 182. Second perforations 180 extended in a second perforation direction 184. First perforation direction 182 is different to second perforation direction 184. The first perforations 154 and the second perforations 180 are interspersed.

[0303] First perforation direction 182 is angled with respect to longitudinal axis 186 of the first heating element 122 by an angle 188 of between 90° and 150°. Second perforation direction 184 is angled with respect to longitudinal axis 186 of first heating element 122 by an angle 190 of between 30° and 90°. The airflow through airflow channel 110 is shown by arrow 192.

[0304] First perforation direction 182 at least partially points in the direction of airflow 192 through air flow channel 110. Second perforation direction 184 at least partially points in the direction opposite to airflow 192 through air flow channel 110.

[0305] As first perforation direction 182 at least partially points in the direction of airflow 192 through air flow channel 110, the airflow towards the mouthpiece 112 is accelerated. As second perforation direction 184 at least partially points in the direction opposite of airflow 192, the airflow through the second perforations 180 cause turbulence in the airflow channel 110.

[0306] First perforations 154 and second perforations 180 have rounded edges 194.

[0307] Fig. 9 shows aerosol-generating article 116 and heating element 122 with rounded edges 194 and rounded downstream end 196. Fig. 9 illustrates an insertion of aerosolgenerating article 116 into the cavity as indicated by arrow. As aerosol-generating article 116 is inserted into the cavity, article 116 slides past heating element 122. Rounded edges 194 reduce the risk of article 116 from getting damaged during the insertion action and improves the smoothness of the insertion action. Due to rounded downstream end 196, article 116 can be more easily inserted into the cavity.

Claims

CLAIMS1. An aerosol-generating device comprising a first cavity configured for receiving a first aerosol-forming substrate, an air inlet, a first cavity inlet configured for fluidly connecting the air inlet and the first cavity, a first airflow channel, a first airflow channel inlet configured for fluidly connecting the air inlet and the first airflow channel, and a heating arrangement comprising at least a first heating element, wherein the first heating element comprises two or more first perforations, wherein each of the two or more first perforations extends along a first perforation direction, wherein the first perforation direction is angled with respect to a longitudinal axis of the first heating element, wherein the first heating element is arranged between the first cavity and the first airflow channel, wherein the heating element is arranged abutting the first cavity and the first airflow channel, wherein the two or more first perforations are configured for fluidly connecting the first cavity with the first airflow channel.

2. The aerosol-generating device according to claim 1 , wherein the first perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 150°.

3. The aerosol-generating device according to any of the preceding claims, wherein the first heating element comprises two or more second perforations, wherein the two or more second perforations extend along a second perforation direction, wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element, wherein the two or more second perforations are configured for fluidly connecting the first cavity with the first airflow channel.

4. The aerosol-generating device according to claim 3, wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 150°.

5. The aerosol-generating device according to any claims 3 and 4, wherein the first perforation direction is different to the second perforation direction.

6. The aerosol-generating device according to any of claims 3 to 5, wherein the first perforation direction is angled with respect to the longitudinal axis of the first heating element by between 30° and 90°, and wherein the second perforation direction is angled with respect to the longitudinal axis of the first heating element by between 90° and 150°.

7. The aerosol-generating device according to any of the preceding claims, wherein the heating arrangement comprises a second heating element, wherein the second heating element comprises two or more third perforations, wherein each of the two or more third perforations extends along a third perforation direction, wherein the third perforation direction is angled with respect to a longitudinal axis of the second heating element.

8. The aerosol-generating device according to claim 7, wherein the third perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 150°9. The aerosol-generating device according to any of claims 7 and 8, wherein the second heating element comprises two or more fourth perforations, wherein each of the two or more fourth perforations extends along a fourth perforation direction, wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element.

10. The aerosol-generating device according to claim 9, wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 150°11. The aerosol-generating device according to any of claims 9 and 10, wherein the third perforation direction is angled with respect to the longitudinal axis of the second heating element by between 30° and 90°, and wherein the fourth perforation direction is angled with respect to the longitudinal axis of the second heating element by between 90° and 150°12. The aerosol-generating device according to any of claims 9 to 11, wherein the device comprises a second cavity configured for receiving a second aerosol-forming substrate, wherein the second heating element is arranged between the second cavity and the first airflow channel, wherein the second heating element is arranged abutting the second cavity and the first airflow channel, wherein one or both of the two or more third perforationsand the two or more fourth perforations are configured for fluidly connecting the second cavity with the first airflow channel.

13. An aerosol-generating system comprising the aerosol-generating device according to any of claims 1 to 12 and a first aerosol-forming substrate, preferably a first planar aerosol-forming substrate.

14. The aerosol-generating system according to claim 13 comprising the device of claim 12, wherein the system comprises a second aerosol-forming substrate, preferably a second planar aerosol-forming substrate.

15. The aerosol-generating system according to claim 14, wherein the first aerosol-forming substrate forms part of a first aerosol-generating article, preferably wherein the first planar aerosol-generating article and wherein the second aerosol-forming substrate forms part of a second aerosol-generating article, preferably a second planar aerosolgenerating article, preferably wherein the first aerosol-generating article is shaped to closely conform to the shape of the first cavity and wherein the second aerosol-generating article is shaped to closely conform to the shape of the second cavity.

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