Aerosol generator with two cavities and a susceptor element

Abstract

The present invention relates to an aerosol generator (100). The device comprises a first cavity (150) configured to receive a first planar aerosol forming substrate. The device comprises a second cavity (152) configured to receive a second planar aerosol forming substrate. The device comprises an airflow channel (148) and an induction heating arrangement comprising a susceptor element (138). The susceptor element is disposed between the first cavity and the second cavity. The susceptor element is configured to define the airflow channel at least partially. The susceptor element is configured to fluidly connect the first cavity to the airflow channel. The susceptor element is configured to fluidly connect the second cavity to the airflow channel.

Description

Technical Field

[0001] The present invention relates to an aerosol generating device and an aerosol generating system.

Background Art

[0002] It is known to provide an aerosol generating device for generating inhalable vapor. Such a device can heat an aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate volatilize without burning the aerosol-forming substrate. The aerosol-forming substrate can be provided as part of an aerosol-generating article. The aerosol-generating article can have a rod shape for insertion of the aerosol-generating article into a cavity (such as a heating chamber) of the aerosol generating device. The heating element can be disposed within or around a heating chamber for heating the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol generating device.

[0003] It would be desirable to provide an aerosol generating system having improved heating efficiency. It would be desirable to provide an aerosol generating system having improved aerosol generation. It would be desirable to provide an aerosol generating system that provides a compatible user experience. It would be desirable to provide an aerosol generating system that provides improved airflow through the system. It would be desirable to provide an aerosol generating system that can be manufactured more efficiently. It would be desirable to provide an aerosol generating device that allows the use of multiple aerosol-forming substrates.

Summary of the Invention

[0004] According to a first aspect of the present invention, an aerosol generator is provided. The device comprises a first cavity configured to receive a first planar aerosol forming substrate. The device comprises a second cavity configured to receive a second planar aerosol forming substrate. The device comprises an airflow channel. The device comprises an induction heating arrangement comprising a susceptor element. The susceptor element is disposed between the first cavity and the second cavity. The susceptor element is configured to define the airflow channel at least partially. The susceptor element is configured to fluidly connect the first cavity to the airflow channel. The susceptor element is configured to fluidly connect the second cavity to the airflow channel.

[0005] According to one embodiment of the present invention, an aerosol generator is provided. The device may comprise a first cavity configured to receive a first planar aerosol-forming substrate. The device may comprise a second cavity configured to receive a second planar aerosol-forming substrate. The device may comprise an airflow channel. The device may comprise an induction heating arrangement comprising a susceptor element. The susceptor element may be disposed between the first cavity and the second cavity. The susceptor element may be configured to define the airflow channel at least partially. The susceptor element may be configured to fluidly connect the first cavity to the airflow channel. The susceptor element may be configured to fluidly connect the second cavity to the airflow channel.

[0006] The first cavity may be planar. The second cavity may be planar. The susceptor element may be planar. The airflow channel may be planar. At least a portion of the airflow channel may be planar. The first cavity may have a rectangular cross-section. The second cavity may have a rectangular cross-section. The susceptor element may have a rectangular cross-section. The airflow channel may have a rectangular cross-section. One or more of the first cavity, the second cavity, the susceptor element, and the airflow channel may be flat.

[0007] The susceptor element may be configured to direct the fluid flow from a first cavity to an airflow channel. The susceptor element may be configured to direct the fluid flow from a second cavity to an airflow channel. The susceptor element may be porous.

[0008] The susceptor element may be sandwiched between a first cavity and a second cavity. The first cavity may be located radially outside the susceptor element. The second cavity may be located radially outside the susceptor element. The first cavity may be located radially outside the airflow channel. The second cavity may be located radially outside the airflow channel. The susceptor element may surround at least a portion of the airflow channel.

[0009] The first aerosol-forming substrate may be part of the first aerosol-generating article. The second aerosol-forming substrate may be part of the second aerosol-generating article. The first cavity may be configured to receive the first aerosol-generating article. The second cavity may be configured to receive the second aerosol-generating article.

[0010] The susceptor element may be configured to heat a first aerosol-forming substrate inserted into a first cavity. The susceptor element may be configured to heat a first aerosol-forming article inserted into a first cavity. The susceptor element may be configured to heat a second aerosol-forming substrate inserted into a first cavity. The susceptor element may be configured to heat a second aerosol-forming article inserted into a first cavity.

[0011] Aerosol generators may allow for the adjustment of the user experience. Aerosol generators may enable consumers to personalize their user experience. Aerosol generators may provide optimized heat transfer to one or both of a first aerosol-forming substrate and a second aerosol-forming substrate. Aerosol generators may allow for control of airflow management through the device. Aerosol generators may optimize aerosol generation. Aerosol generators may optimize aerosol delivery.

[0012] By providing a first cavity and a second cavity, it may be possible to provide a first user experience and a second user experience. By providing a first cavity and a second cavity, the user may be able to choose between the first user experience and the second user experience. By providing a first cavity and a second cavity, the user may be able to adjust the user experience. By providing a first cavity and a second cavity, the airflow management for the first aerosol-forming substrate and the second aerosol-forming substrate can be controlled independently.

[0013] The first cavity may include a first cavity opening configured for the insertion of a first aerosol-forming substrate. The second cavity may include a second cavity opening configured for the insertion of a second aerosol-forming substrate.

[0014] The airflow channel may include an airflow channel opening. The airflow channel opening may be located at the downstream end of the airflow channel.

[0015] The first cavity opening may have a substantially rectangular cross-section. The second cavity opening may have a substantially rectangular cross-section.

[0016] The susceptor element may include a wall. The wall of the susceptor element may comprise at least a first wall portion and a second wall portion. The wall may be configured to define an airflow channel.

[0017] The first wall portion and the second wall portion may be connected. The first wall portion and the second wall portion may be separated. The first wall portion and the second wall portion may be separated by a gap.

[0018] The first wall portion may be planar. The second wall portion may be planar. The first wall portion may be a sheet. The second wall portion may be a sheet. The first wall portion may have a rectangular cross-section. The second wall portion may have a rectangular cross-section.

[0019] The first and second wall portions may define at least a portion of the airflow channel. The first and second wall portions may surround at least a portion of the airflow channel. The first and second wall portions may sandwich the airflow channel. The first and second wall portions may define the shape of the airflow channel.

[0020] The first wall portion may be located radially outward of the airflow channel. The second wall portion may be located radially outward of the airflow channel. The first cavity may be located radially outward of the first wall portion. The second cavity may be located radially outward of the second wall portion. The first cavity may be located radially outward of the airflow channel. The second cavity may be located radially outward of the airflow channel.

[0021] The first wall portion of the susceptor element may be configured to heat a first aerosol-forming substrate inserted into a first cavity. The first wall portion of the susceptor element may be configured to heat a first aerosol-generating article inserted into a first cavity. The second wall portion of the susceptor element may be configured to heat a second aerosol-forming substrate inserted into a second cavity. The second wall portion of the susceptor element may be configured to heat a second aerosol-generating article inserted into a second cavity.

[0022] The first wall portion may have one or more openings configured to fluidly connect the first cavity to the airflow channel. The second wall portion may have one or more openings configured to fluidly connect the second cavity to the airflow channel.

[0023] Each opening in the first wall portion may be a perforation of the first wall portion. Each opening in the second wall portion may be a perforation of the second wall portion.

[0024] The first wall portion may be disposed in contact with the first cavity. The second wall portion may be disposed in contact with the second cavity. The first wall portion may be disposed adjacent to the first cavity. The second wall portion may be disposed adjacent to the first cavity. The first wall portion may cover at least a portion of the airflow channel. The second wall portion may cover at least a portion of the airflow channel. The first wall portion may be disposed in contact with the first cavity. The second wall portion may be disposed in contact with the second cavity. The first wall portion may be disposed in contact with the first aerosol generating article. The second wall portion may be disposed in contact with the second aerosol generating article.

[0025] The induction heating system may include a first induction coil and a second induction coil. The induction heating system may include a first planar induction coil. The induction heating system may include a second planar induction coil.

[0026] The first induction coil may be configured to heat the first wall portion of the susceptor element. The second induction coil may be configured to heat the second wall portion of the susceptor element.

[0027] The first induction coil may be cubic in shape. The first induction coil may have a rectangular cross-section. The second induction coil may be cubic in shape. The second induction coil may have a rectangular cross-section.

[0028] The first induction coil may be disposed in contact with the first cavity. The second induction coil may be disposed in contact with the second cavity. The first induction coil may cover at least a part of the first cavity. The second induction coil may cover at least a part of the second cavity. The first induction coil may be disposed parallel to one or both of the first wall portion and the air flow channel. The second induction coil may be disposed parallel to one or both of the second wall portion and the air flow channel. The first induction coil may be disposed adjacent to the first cavity. The second induction coil may be disposed adjacent to the second cavity.

[0029] The first induction coil and the second induction coil may sandwich the first cavity, the second cavity, the susceptor element, and the air flow channel. The first cavity, the second cavity, the susceptor element, and the air flow channel may be disposed between the first induction coil and the second induction coil.

[0030] The device may be configured such that the first induction coil and the second induction coil can be controlled independently. The device may be configured such that the first induction coil and the second induction coil can operate independently.

[0031] The device may include a controller. A first induction coil may be connected to the controller. A second induction coil may be connected to the controller. The controller may be configured to operate the first induction coil. The controller may be configured to operate the second induction coil. The controller may be configured to operate the first induction coil independently 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 from the second power supply. The first power supply may be different from the second power supply in terms of one or more of the 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. The first heating profile may be different from the second heating profile.

[0032] The first induction coil may be configured to heat the first wall portion. The first induction coil may be configured to generate an alternating magnetic field that penetrates the first wall portion. The second induction coil may be configured to heat the second wall portion. The second induction coil may be configured to generate an alternating magnetic field that penetrates the second wall portion.

[0033] The susceptor element may be located in the center. The first cavity may be located radially outside the susceptor element. The first induction coil may be located radially outside the first cavity. The second cavity may be located radially outside the susceptor element. The second cavity may be located on the opposite side of the first cavity. The second induction coil may be located radially outside the second cavity.

[0034] The first induction coil, the first cavity, the first wall section, the airflow channel, the second wall section, the second cavity, and the second induction coil may be arranged parallel to each other.

[0035] The apparatus may include an air intake. The apparatus may include a first airflow conduit. The apparatus may include a second airflow conduit. The apparatus may include a third airflow conduit. The first airflow conduit may be configured to fluidly connect the air intake to a first cavity. The second airflow conduit may be configured to fluidly connect the air intake to a second cavity. The third airflow conduit may be configured to fluidly connect the air intake to an airflow channel.

[0036] The first cavity may be located downstream of the first airflow conduit. The second cavity may be located downstream of the second airflow conduit. The airflow channel may be located downstream of the third airflow conduit.

[0037] The first airflow conduit may be arranged parallel to the second airflow conduit. The first airflow conduit may be arranged parallel to the third airflow conduit. The second airflow conduit may be arranged parallel to the third airflow conduit.

[0038] One or more of the first cavity, the second cavity, and the airflow channel may be cubic in shape.

[0039] The device may comprise a main unit that includes one or both a controller and a power supply. The main unit may include a housing.

[0040] The controller may be configured to supply power from the power source to the first induction coil. The controller may also be configured to supply power from the power source to the second induction coil.

[0041] The main unit may be equipped with a data port. The data port may be connected to an external device for transferring data between the aerosol generator and the external device. The main unit may be equipped with a recharge port. The recharge port may be connected to an external electrical energy source for recharging the power supply.

[0042] One or both of the first and second cavities may have a length of 10 to 30 millimeters, a width of 7 to 17 millimeters, and a height of 1 to 5 millimeters.

[0043] The longitudinal axes of one or more of the first cavity, the second cavity, and the airflow channel may be arranged parallel to the central longitudinal axis of the aerosol generator.

[0044] The longitudinal axis of a component may be along the longitudinal direction of the component or parallel to the longitudinal direction of the component. The longitudinal axis of a device may extend between the distal and proximal ends of the device. The longitudinal axis of an article may extend between the distal and proximal ends of the article.

[0045] The aerosol generator may be equipped with a mouthpiece.

[0046] The airflow channel may extend through the mouthpiece. Alternatively, the airflow channel may be positioned in contact with the mouthpiece. The mouthpiece may include a housing.

[0047] The mouthpiece may include a chamber. The chamber may be located downstream of one or more of the first cavity, the second cavity, and the airflow channel.

[0048] The chamber may be in fluid communication with one or more of the first cavity, the second cavity, and the airflow channel. Alternatively, the airflow channel may comprise the chamber. The chamber may be in direct fluid communication with one or more of the first cavity, the second cavity, and the airflow channel. The first cavity may be fluidly connected to the mouthpiece through the opening of the first cavity. The second cavity may be fluidly connected to the mouthpiece through the opening of the second cavity. The airflow channel may be fluidly connected to the mouthpiece through the opening of the airflow channel. The opening of the airflow channel may be in contact with the mouthpiece. The opening of the airflow channel may be in contact with the chamber of the mouthpiece.

[0049] The mouthpiece chamber may be configured for one or more of the following purposes: mixing, homogenizing, and cooling the volatile aerosol-forming substrates of one or both of the first and second aerosol-forming substrates.

[0050] The airflow channel may have an opening that is fluid-connected to the mouthpiece.

[0051] The mouthpiece may be equipped with an aerosol outflow channel.

[0052] The apparatus may include a first cavity opening and a second cavity opening. One or more of the airflow channel opening, the first cavity opening, and the second cavity opening may be fluid-connected to the mouthpiece chamber.

[0053] The first cavity opening may contact the mouthpiece. The first cavity opening may contact the chamber of the mouthpiece. The second cavity opening may contact the mouthpiece. The second cavity opening may contact the chamber of the mouthpiece.

[0054] The apparatus may include an intermediate section comprising a first cavity, a second cavity, an airflow channel, and an induction heating arrangement. The intermediate section may be detachably connected to the mouthpiece and the main body. The mouthpiece may be sealed to the intermediate section.

[0055] The intermediate section may include a first induction coil. The intermediate section may include a second induction coil. The intermediate section may include a housing. The intermediate section may include a susceptor element. The intermediate section may include an air intake. The intermediate section may include one or more of the first airflow conduit, the second airflow conduit, and the third airflow conduit.

[0056] The intermediate section may be detachably connected to the main body. The intermediate section may also be detachably connected to the mouthpiece.

[0057] The intermediate section may have a downstream end. The intermediate section may have an upstream end. The mouthpiece may be detachably connected to the downstream end of the intermediate section. The main body may be detachably connected to the upstream end of the intermediate section.

[0058] The main body may be equipped with a power connector. The intermediate section may be equipped with a power connector. The power connector on the main body may be configured complementary to the power connector on the intermediate section. The power connector on the main body may be in contact with the power connector on the intermediate section when the main body is connected to the intermediate section. The power connector on the main body and the power connector on the intermediate section may electrically connect the power supply to one or both of the first and second induction coils. Power may be delivered from the power supply to one or both of the first and second induction coils through the power connector on the main body and the power connector on the intermediate section.

[0059] The main body may have a length of 30 mm to 70 mm. The main body may have a width of 12 mm to 35 mm. The main body may have a height of 5 mm to 15 mm.

[0060] The intermediate section may have a length of 20 mm to 45 mm. The intermediate section may have a width of 12 mm to 35 mm. The intermediate section may have a height of 5 mm to 15 mm.

[0061] The mouthpiece may have a length of 15 mm to 40 mm. The middle section may have a width of 12 mm to 35 mm. The middle section may have a height of 5 mm to 15 mm.

[0062] The intermediate section and / or the mouthpiece may contain a polymer material. The intermediate section and / or the mouthpiece may be made from a polymer material.

[0063] The airflow channel may have a length of 7 mm to 21 mm. The airflow channel may have a width of 7 mm to 17 mm. The airflow channel may have a height of 1.5 mm to 3.5 mm.

[0064] The susceptor element may contain a ferromagnetic alloy. The susceptor element may consist of a ferromagnetic alloy. The susceptor element may contain stainless steel. The susceptor element may consist of stainless steel. The susceptor element may contain a medical-grade stainless steel alloy (200 series alloy). The susceptor element may consist of a medical-grade stainless steel alloy (200 series alloy).

[0065] In a second aspect of the present invention, the present invention relates to an aerosol generating system. The system comprises an aerosol generating apparatus as described herein. The system includes a first aerosol forming substrate, preferably a first planar aerosol forming substrate.

[0066] In a second embodiment, the present invention relates to an aerosol generating system. The system comprises an aerosol generating apparatus as described herein. The system may include a first aerosol-forming substrate, preferably a first planar aerosol-forming substrate.

[0067] The system may include a second aerosol-forming substrate, preferably a second planar aerosol-forming substrate.

[0068] The first aerosol-forming substrate may be flat. The second aerosol-forming substrate may be flat. The first aerosol-generating article may be flat. The second aerosol-generating article may be flat. The first aerosol-forming substrate may be cubic in shape. The first aerosol-forming substrate may have a rectangular cross-section. The second aerosol-forming substrate may be cubic in shape. The second aerosol-forming substrate may have a rectangular cross-section. By using one or both of the planar aerosol-forming substrate and the planar article, heating efficiency can be improved. By using one or both of the planar aerosol-forming substrate and the planar article, the dimensions of the aerosol generator can be minimized. By using one or both of the planar aerosol-forming substrate and the planar article, energy consumption can be optimized.

[0069] The first aerosol-forming substrate may be configured differently from the second aerosol-forming substrate. The first aerosol-generating article may be configured differently from the second aerosol-generating article. The second aerosol-forming substrate may contain flavor. The second aerosol-generating article may contain flavor.

[0070] The controller may be configured to provide a first heating profile to a first aerosol-forming substrate. The controller may be configured to provide a first heating profile to a first aerosol-generating article. The controller may be configured to provide a second heating profile to a second aerosol-forming substrate. The controller may be configured to provide a second heating profile to a second aerosol-generating article.

[0071] The system may comprise an aerosol generator as described herein, a first aerosol-forming substrate as described herein, and a second aerosol-forming substrate as described herein. 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 differ from the second user experience. Power may be supplied to a first induction coil to provide the first experience. A first heating profile may be supplied to a first wall portion of the susceptor element. The first heating profile may be adapted to the properties of the first aerosol-forming substrate. Power may be supplied to a second induction coil to provide a second experience. A second heating profile may be supplied to a second wall portion of the susceptor element. The second heating profile may be adapted to the properties of the second aerosol-forming substrate.

[0072] A third user experience may be provided by supplying power to both the first and second induction coils. The third user experience may be a combination of the first and second user experiences. The third user experience may be adjusted by adapting one or both of the first and second heating profiles. The third user experience may be tailored to the individual consumer's preferences.

[0073] The first aerosol-forming substrate and the second aerosol-forming substrate may have the same configuration.

[0074] 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.

[0075] The first aerosol-forming substrate may form part of the 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 the 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.

[0076] The first aerosol generating article may be cubic in shape. The first aerosol generating article may have a rectangular cross-section. The second aerosol generating article may be cubic in shape. The second aerosol generating article may have a rectangular cross-section.

[0077] The first aerosol-forming substrate may be porous. The second aerosol-forming substrate may be porous. The first aerosol-generating article may be porous. The second aerosol-generating article may be porous. The first aerosol-forming substrate may be configured so that an airflow can pass through it. At least a portion of the airflow passing through the first cavity may flow through at least a portion of one or both of the first aerosol-forming substrate and the first aerosol-generating article. The second aerosol-forming substrate may be configured so that an airflow can pass through it. At least a portion of the airflow passing through the second cavity may flow through at least a portion of one or both of the first aerosol-forming substrate and the first aerosol-generating article.

[0078] The present invention allows users to flexibly adapt the user experience. For example, if a user experience having such a first characteristic is desired, the user may insert a first aerosol generating article containing a first aerosol-forming substrate having a specific first characteristic, such as a first flavor or a first nicotine content. Alternatively, if a user experience having such a second characteristic is desired, the user may insert a second aerosol generating article containing a second aerosol-forming substrate having a specific second characteristic, such as a second flavor or a second nicotine content. Alternatively, if a user desires a combination of the first and second characteristics, the user may insert both the first and second aerosol generating articles. The ratio between the first and second characteristics may be adjusted by adapting the heating profiles of the first wall portion of the susceptor element and the first wall portion of the second susceptor element. For example, if a user experience primarily having the first characteristic is desired, one or both of the power supply intensity and the length of the power supply to the first induction coil may be increased, while one or both of the power supply intensity and the length of the power supply to the second induction coil may be decreased.

[0079] During use, the consumer may insert one or both of the first and second aerosol generating articles into the device. The user can inhale air into the device and draw it out through the device's air intake. The airflow may be distributed between one or more of the first cavity, the second cavity, and the airflow channel. The first wall portion may heat the first aerosol-forming substrate inserted into the first cavity, causing at least a portion of the first substrate to volatilize. The second wall portion may heat the second aerosol-forming substrate inserted into the second cavity, causing at least a portion of the second substrate to volatilize. At least a portion of the volatilized first substrate may flow into the mouthpiece chamber through the opening of the first cavity. At least a portion of the volatilized second substrate may flow into the mouthpiece chamber through the opening of the second cavity. Another portion of the volatilized first substrate may flow into the airflow channel through an opening in the first wall portion disposed between the first cavity and the airflow channel. Another portion of the volatile second substrate may flow into the airflow channel through an opening in the second wall portion disposed between the second cavity and the airflow channel. Such volatile substrate may mix within the airflow channel with the airflow directly entering the airflow channel via a third airflow conduit. The mixture in the airflow channel may flow into the mouthpiece chamber through the airflow channel opening. Different airflows entering the mouthpiece chamber may mix within the chamber. The mixture may cool within the chamber and form an aerosol. The aerosol may be inhaled by the consumer through the aerosol outlet of the mouthpiece.

[0080] The first aerosol-forming substrate and the second aerosol-forming substrate may be selected according to one or more of the following: (i) the first aerosol-forming substrate is shaped to closely conform to the shape of the first cavity and the second aerosol-forming substrate is shaped to closely conform to the shape of the second cavity; (ii) a first aerosol-forming substrate having a first flavor and a second aerosol-forming substrate having a second flavor; (iii) a first aerosol-forming substrate containing nicotine and a second aerosol-forming substrate containing flavor; (iv) the first aerosol-forming substrate is configured to provide a first heating profile and the second aerosol-forming substrate is configured to provide a second heating profile; and (v) the first aerosol-forming substrate is configured to provide a first user experience and the second aerosol-forming substrate is configured to provide a second user experience.

[0081] The first aerosol-forming substrate may be shaped differently from the second aerosol-forming substrate. The first flavor may differ from the second flavor. The first heating profile may differ from the second heating profile. The first user experience may differ from the second user experience.

[0082] As used herein, the terms “proximal,” “distal,” “downstream,” and “upstream” are used to describe the relative position of a component or part of a component of an aerosol generator with respect to the direction in which the user inhales through the aerosol generator during its use.

[0083] An aerosol generator may have an oral end through which, during use, aerosol exits the aerosol generator and is delivered to the user. The oral end may be referred to as the proximal end. During use, the user inhales the aerosol generated by the aerosol generator by inhaling the proximal or oral end of the aerosol generator. A mouthpiece may be positioned at the oral end. The aerosol generator has a distal end opposite to the proximal or oral end. The body may be positioned at the distal end. The proximal or oral end of the aerosol generator may also be referred to as the downstream end, and the distal end of the aerosol generator may also be referred to as the upstream end. Components of the aerosol generator, or parts of components, may be described as being upstream or downstream of each other based on their relative positions between the proximal, downstream, or oral end of the aerosol generator and the distal or upstream end of the aerosol generator.

[0084] As used herein, the term "aerosol generator" refers to a device that generates an aerosol by interacting with an aerosol-forming substrate. The aerosol-forming substrate may be part of an aerosol-generating article, for example, part of a smoking article. The aerosol generator may be a smoking device that interacts with the aerosol-forming substrate of an aerosol-generating article to generate an aerosol that can be directly inhaled through the user's mouth into the user's lungs. The aerosol generator may be a holder. The device may be an electrically heated smoking device. The aerosol generator may comprise a housing, an electrical circuit, a power supply, and an induction heating arrangement.

[0085] The term "smoking," as used herein in relation to the present invention, relating to apparatus, articles, systems, substrates, or otherwise, does not refer to conventional smoking in which the aerosol-forming substrate is completely or at least partially burned. The aerosol-generating apparatus of the present invention is configured to heat the aerosol-forming substrate to a temperature below the combustion temperature of the aerosol-forming substrate, but above the temperature at which one or more volatile compounds of the aerosol-forming substrate are released, in order to form an inhalable aerosol.

[0086] The aerosol generator may include an electrical circuit. The electrical circuit may include a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of a controller. The electrical circuit may include further electronic components. The electrical circuit may be configured to regulate the power supply to the induction heating arrangement. Power may be supplied to the induction heating arrangement continuously following the operation of the aerosol generator, or intermittently (e.g., with each smoke extraction). Power may be supplied to the induction heating arrangement in the form of current pulses. The electrical circuit may be configured to monitor the electrical resistance of one or both of the first and second wall portions, and preferably to control the power supply to one or both of the first and second induction coils, depending on the electrical resistance of one or both of the first and second wall portions.

[0087] The aerosol generator may have a power source (typically a battery) within the body of the aerosol generator. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery (e.g., a lithium-cobalt battery, lithium iron phosphate, lithium titanate, or lithium polymer battery). The power source may be a lithium-ion polymer battery. Alternatively, the power source may be another form of charge storage device, such as a capacitor. The power source may be an electric double-layer capacitor. The power source may be a hypercapacitor. The power source may require recharging and may have a capacity that allows for the storage of sufficient energy for one or more use experiences. For example, the power source may have sufficient capacity to continuously generate aerosol for about six minutes, or for a time that is a multiple of six minutes. In another embodiment, the power source may have sufficient capacity to provide a predetermined number of fume extractions or discontinuous operation of the heating element.

[0088] The first cavity opening may be at the proximal end. The second cavity opening may be at the proximal end. The first cavity may have a base facing the first cavity opening. The second cavity may have a base facing the second cavity opening. The base of the first cavity may be closed except for providing a first airflow conduit disposed at the base. The base of the second cavity may be closed except for providing a second airflow conduit disposed at the base. The base of the first cavity may be flat. The base of the second cavity may be flat. The base of the first cavity may be rectangular. The base of the second cavity may be rectangular. The base of the first cavity may be located upstream of the first cavity. The base of the second cavity may be located upstream of the second cavity. The first cavity opening may be located downstream of the first cavity. The second cavity opening may be located downstream of the second cavity. The first cavity may have an elongated extension. The second cavity may have an elongated extension. The first cavity may have a central axis in the longitudinal direction. The second cavity may have a central axis in the longitudinal direction. The longitudinal direction may be a direction extending between the cavity opening and the base along the central axis in the longitudinal direction. The central axis in the longitudinal direction of the first cavity may be parallel to the longitudinal axis of the aerosol generator. The central axis in the longitudinal direction of the second cavity may be parallel to the longitudinal axis of the aerosol generator.

[0089] The airflow channel may have a base. The airflow channel base may be closed to provide a third airflow conduit. The airflow channel base may be flat. The airflow channel cavity may be rectangular. The airflow channel may be located upstream of the airflow channel. The airflow channel may have an elongated extension. The airflow channel may have a longitudinal axis.

[0090] 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 received in the first cavity. The second cavity may have a shape corresponding to the shape of the second aerosol generating article 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.

[0091] The susceptor element may be made of a material capable of generating heat when penetrated by an alternating magnetic field. A first induction coil may generate an alternating magnetic field in a first cavity. The first induction coil may generate an alternating magnetic field penetrating the first wall portion of the susceptor element. A second induction coil may generate an alternating magnetic field in a second cavity. The second induction coil may generate an alternating magnetic field penetrating the second wall portion of the susceptor element.

[0092] When the susceptor element is conductive, eddy currents are typically induced by the alternating magnetic field. When the susceptor element is magnetic, another effect that typically contributes to heating is generally called hysteresis loss. Hysteresis loss arises mainly from the movement of magnetic domain blocks within the susceptor element, because these magnetic orientations align with the alternatingly induced magnetic field. Another effect that contributes to hysteresis loss is when magnetic domains expand or contract within the susceptor element. Generally, all these changes occurring at or below the nanoscale within the susceptor element generate heat and are therefore called "hysteresis loss." Thus, when the susceptor element is both magnetic and conductive, both hysteresis loss and the generation of eddy currents contribute to the heating of the susceptor element. If the material of the susceptor element is magnetic but not conductive, hysteresis loss becomes the only way the susceptor element will be heated when penetrated by an alternating magnetic field. According to the present invention, the susceptor element may be conductive or magnetic, or both conductive and magnetic. An alternating magnetic field generated by one or more induction coils can heat the susceptor element, which then transfers heat to the aerosol-forming substrate, resulting in the formation of an aerosol. An alternating magnetic field generated by a first induction coil heats a first wall portion, which then transfers heat to a first aerosol-forming substrate. An alternating magnetic field generated by a second induction coil heats a second wall portion, which then transfers heat to a second aerosol-forming substrate. Heat transfer may be mainly by conduction. Such heat transfer is best when the susceptor element is in close thermal contact with the aerosol-forming substrate.

[0093] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate having the ability to release volatile compounds capable of forming aerosols. For example, an aerosol-generating article may be a smoking article that generates an aerosol that can be directly inhaled into the user's lungs through the user's mouth. Aerosol-generating articles may be disposable.

[0094] As used herein, the term "aerosol-forming substrate" refers to a substrate having the ability to release one or more volatile compounds capable of forming aerosols. Such volatile compounds may be released by heating the aerosol-forming substrate. Conveniently, the aerosol-forming substrate may be part of an aerosol-generating article or a smoking article.

[0095] The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosol-forming substrate may contain both solid and liquid components. The aerosol-forming substrate may contain tobacco-containing materials that contain volatile tobacco-flavoring compounds released from the substrate upon heating. The aerosol-forming substrate may contain nicotine. The aerosol-forming substrate may contain non-tobacco materials. The aerosol-forming substrate may contain an aerosol-forming agent that facilitates the formation of a high-density and stable aerosol. Examples of preferred aerosol-forming agents include glycerin and propylene glycol. The aerosol-forming substrate may also be a liquid aerosol-forming substrate. The aerosol-forming substrate may contain flavoring agents. The aerosol-forming substrate may contain plant-derived medicines. The aerosol-forming substrate may contain cannabis for therapeutic purposes. [Brief explanation of the drawing]

[0096] [Figure 1] Figure 1 shows the aerosol generating device of the present invention. [Figure 2] Figure 2 shows the aerosol generator of the present invention. [Figure 3] Figure 3 shows an enlarged view of the intermediate section of Figure 2. [Figure 4] Figure 4 shows the aerosol generator of the present invention having an inserted first aerosol-forming substrate and a second aerosol-forming substrate. [Figure 5] Figure 5 shows the aerosol generator of the present invention having an inserted first aerosol-forming substrate and a second aerosol-forming substrate. [Figure 6]Figure 6 shows the aerosol generator of the present invention having an inserted first aerosol-forming substrate and a second aerosol-forming substrate. [Modes for carrying out the invention]

[0097] [Examples] The present invention is defined in the claims. However, a non-exclusive list of non-limiting embodiments is provided below. One or more features of these embodiments may be combined with any one or more features of other embodiments, forms, or aspects described herein.

[0098] Example 1: Aerosol generator comprising: a first cavity configured to receive a first planar aerosol forming substrate; a second cavity configured to receive a second planar aerosol forming substrate; an airflow channel; and an induction heating arrangement comprising a susceptor element, wherein the susceptor element is disposed between the first cavity and the second cavity; the susceptor element is configured to at least partially define the airflow channel; the susceptor element is configured to fluidly connect the first cavity to the airflow channel; and the susceptor element is configured to fluidly connect the second cavity to the airflow channel. Example 2: The aerosol generator according to Example 1, wherein the susceptor element is configured to direct the fluid flow from a first cavity to an airflow channel, and the susceptor element is configured to direct the fluid flow from a second cavity to an airflow channel. Example 3: An aerosol generator according to any one of Examples 1 to 2, wherein the first cavity comprises a first cavity opening configured for the insertion of a first aerosol-forming substrate, and the second cavity comprises a second cavity opening configured for the insertion of a second aerosol-forming substrate. Example 4: The aerosol generator according to any one of Examples 1 to 3, wherein the susceptor element comprises a wall, the wall of the susceptor element comprising at least a first wall portion and a second wall portion, and the wall is configured to define an airflow channel. Example 5: The aerosol generator according to Embodiment 4, wherein the first wall portion comprises one or more openings configured to fluidly connect the first cavity to an airflow channel, and the second wall portion comprises one or more openings configured to fluidly connect the second cavity to an airflow channel. Example 6: The aerosol generator according to either of Examples 4 and 5, wherein the first wall portion is disposed in contact with the first cavity, and the second wall portion is disposed in contact with the second cavity. Example 7: The induction heating arrangement comprises a first induction coil, preferably a first planar induction coil, and a second induction coil, preferably a second planar induction coil, according to any one of Examples 1 to 6. Example 8: The aerosol generator according to Example 7, wherein the first induction coil is disposed in contact with the first cavity, and the second induction coil is disposed in contact with the second cavity. Example 9: The aerosol generator according to either of Examples 7 and 8, configured such that the first induction coil and the second induction coil are independently controllable. Example 10: An aerosol generator according to any of Examples 7 to 9, comprising a susceptor element according to any of Examples 4 to 6, wherein a first induction coil is configured to heat a first wall portion, and a second induction coil is configured to heat a second wall portion. Example 11: An aerosol generator according to any one of Examples 7 to 10, wherein a susceptor element is located in the center, a first cavity is located radially outward from the susceptor element, a first induction coil is located radially outward from the first cavity, a second cavity is located radially outward from the susceptor element, a second cavity is located on the opposite side of the first cavity, and a second induction coil is located radially outward from the second cavity. Example 12: An aerosol generator according to any one of Examples 1 to 11, comprising an air intake, a first airflow conduit, a second airflow conduit, and a third airflow conduit, wherein the first airflow conduit is configured to fluidly connect the air intake to a first cavity, the second airflow conduit is configured to fluidly connect the air intake to a second cavity, and the third airflow conduit is configured to fluidly connect the air intake to an airflow channel. Example 13: The aerosol generator according to Example 12, wherein the first cavity is located downstream of the first airflow conduit, the second cavity is located downstream of the second airflow conduit, and the airflow channel is located downstream of the third airflow conduit. Example 14: An aerosol generator according to any of Examples 1 to 13, wherein one or more of the first component, the first cavity, the second cavity, and the airflow channel are cubic in shape. Example 15: The apparatus is an aerosol generator according to any one of Examples 1 to 14, comprising a main body that includes one or both of a controller and a power supply. Example 16: An aerosol generator according to any of Examples 1 to 15, wherein one or both of the first cavity and the second cavity have a length of 10 to 30 mm, a width of 7 to 17 mm, and a height of 1 mm to 5 mm. Example 17: The aerosol generator according to any one of Examples 1 to 16, wherein one or more of the long axis axes of the first cavity, the second cavity, and the airflow channel are arranged parallel to the central long axis axis of the aerosol generator. Example 18: The aerosol generator is the aerosol generator according to any one of Examples 1 to 17, comprising a mouthpiece. Example 19: The aerosol generator according to Example 18, wherein the airflow channel extends through the mouthpiece. Example 20: The aerosol generator according to any one of Examples 18 and 19, wherein the mouthpiece preferably comprises a chamber disposed downstream of one or more of the first cavity, the second cavity, and the airflow channel. Example 21: The aerosol generator according to Example 20, wherein the mouthpiece chamber is configured for one or more of the following: mixing, homogenizing, and cooling the volatile aerosol-forming substrates of one or both of the first aerosol-forming substrate and the second aerosol-forming substrate. Example 22: The aerosol generator according to any one of Examples 18 to 21, wherein the airflow channel has an opening that is fluidly connected to the mouthpiece. Example 23: The aerosol generator according to Example 22, wherein the apparatus comprises a first cavity opening and a second cavity opening as described in Example 3, and the aerosol generator comprises an airflow channel opening, and one or more of the airflow channel opening, the first cavity opening, and the second cavity opening are fluidly connected to the chamber of the mouthpiece. Example 24: The aerosol generator according to any of Examples 18 to 23, comprising an intermediate section having a first cavity, a second cavity, an airflow channel, and an induction heating arrangement, the intermediate section being detachably connected to a mouthpiece and a main body. Example 25: The system is an aerosol generating system comprising an aerosol generating device according to any one of Examples 1 to 24, comprising a first aerosol forming substrate, preferably a first planar aerosol forming substrate. Example 26: The aerosol generation system according to Example 25, comprising a second aerosol-forming substrate, preferably a second planar aerosol-forming substrate. Example 27: The aerosol generation system according to Example 26, wherein the first aerosol-forming substrate is configured differently from the second aerosol-forming substrate. Example 28: The aerosol generating system according to Example 26, wherein the first aerosol-forming substrate and the second aerosol-forming substrate have the same configuration. Example 29: An aerosol generating system according to any one of Examples 25 to 28, wherein the first aerosol-forming substrate is shaped to closely conform to the shape of the first cavity, and the second aerosol-forming substrate is shaped to closely conform to the shape of the second cavity. Example 30: An aerosol generating system according to any one of Examples 25 to 29, wherein a first aerosol-forming substrate forms a part of a first aerosol-generating article, preferably a part of a first planar aerosol-generating article, and a second aerosol-forming substrate forms a part of a second aerosol-generating article, preferably a part of a second planar aerosol-generating article, and preferably the first aerosol-generating article is shaped to closely conform to the shape of a first cavity, and the second aerosol-generating article is shaped to closely conform to the shape of a second cavity.

[0099] A non-exclusive list of non-limiting embodiments is provided below. One or more features of these embodiments may be combined with any one or more features of other embodiments, forms, or aspects described herein.

[0100] Features described in reference to one embodiment may also apply to other embodiments of the present invention.

[0101] The present invention will be further explained with reference to the following attached drawings, which are for illustrative purposes only.

[0102] Figure 1 shows the aerosol generator 100 of the present invention. The device 100 is shown in a disassembled state. The device 100 comprises a planar body 102. The device 100 comprises a planar intermediate section 104. The device 100 comprises a planar mouthpiece 106. The body 102 comprises a controller (not shown) and a power supply (not shown). The intermediate section 104 comprises a planar first cavity 108 and a planar second cavity 110. The mouthpiece 106 comprises an air outlet 112.

[0103] The main body 102 may be connected to the upstream end of the intermediate section 104. The downstream end of the intermediate section 104 may be connected to the upstream end of the mouthpiece 106.

[0104] Figure 2 shows the aerosol generator 100 of the present invention. The device 100 is shown disassembled. The device 100 comprises a planar body 102. The device 100 comprises a planar intermediate section 104. The device 100 comprises a planar mouthpiece 106.

[0105] The main unit 102 includes a controller 114. The main unit 102 includes a power supply 116. The main unit 102 includes a housing 118. The main unit 102 includes power and data ports 120.

[0106] The mouthpiece 106 includes a housing 122. The mouthpiece 106 includes a chamber 124. The mouthpiece 106 includes an aerosol outflow channel 126.

[0107] As indicated by arrow 130, the downstream end of the main body 102 may be connected to the upstream end of the intermediate section 104. As indicated by arrow 132, the downstream end of the intermediate section 104 may be connected to the upstream end of the mouthpiece 106.

[0108] The main unit 102 includes a power connector 134. The intermediate section 104 includes a power connector 136. The power connector 134 of the main unit 102 is configured to be complementary to the power connector 136 of the intermediate section 104. When the main unit 102 is connected to the intermediate section 104, the power connectors 134 and 136 are in contact. During use, power may be supplied from the battery 116 of the main unit 102 to the intermediate section 104 via the connection between the power connectors 134 and 136.

[0109] Figure 3 shows an enlarged view of the intermediate section 104 of Figure 2. The intermediate section 104 includes a susceptor element 138. The susceptor element 138 is planar. The susceptor element 138 includes a first wall portion 140. The susceptor element 138 includes a second wall portion 142. The first wall portion 140 includes a first opening 144. The second wall portion 142 includes a second opening 146. The intermediate section 104 includes an airflow channel 148. The first wall portion 140 and the second wall portion 142 surround the airflow channel 148. The first wall portion 140 and the second wall portion 142 form the airflow channel 148. The airflow channel 148 is disposed between the first wall portion 140 and the second wall portion 142. The airflow channel 148 is planar. The intermediate section 104 includes a first cavity opening 178. The intermediate section 104 includes an airflow channel opening 178. The intermediate section 104 also includes a second cavity opening 182.

[0110] The intermediate section 104 includes a first cavity 150. The first cavity 150 is planar. The intermediate section 104 includes a second cavity 152. The second cavity 152 is planar. The first cavity 150 is configured to receive a first aerosol-forming substrate (not shown). The second cavity 152 is configured to receive a second aerosol-forming substrate (not shown). The first cavity 150 abuts against the first wall portion 140. The second cavity 152 abuts against the second wall portion 142. The first opening 144 fluidly connects the first cavity 150 to the airflow channel 148. The first opening 144 may direct the airflow from the first cavity 150 to the airflow channel 148. The second opening 146 fluidly connects the second cavity 152 to the airflow channel 148. The second opening 146 may direct the airflow from the second cavity 152 to the airflow channel 148.

[0111] The intermediate section 104 includes a first induction coil 154. The first induction coil 154 is a planar induction coil. The intermediate section 104 also includes a second induction coil 156. The second induction coil 156 is a planar induction coil. The first induction coil 154 abuts against the first cavity 150. The second induction coil 156 abuts against the second cavity 152.

[0112] The intermediate section 104 includes an air intake port 158. The intermediate section 104 includes a first airflow conduit 160. The first airflow conduit 160 is fluidly connected to the air intake port 158. The first airflow conduit 160 is fluidly connected to the first cavity 150. The first airflow conduit 160 fluidly connects the air intake port 158 ​​to the first cavity 150. The intermediate section 104 includes a second airflow conduit 162. The second airflow conduit 162 is fluidly connected to the air intake port 158. The second airflow conduit 162 is fluidly connected to the second cavity 152. The second airflow conduit 162 fluidly connects the air intake port 158 ​​to the second cavity 152. The intermediate section 104 includes a third airflow conduit 164. The third airflow conduit 164 is fluidly connected to the air intake port 158. The third airflow conduit 164 is fluidly connected to the airflow channel 148. The third airflow conduit 164 fluidly connects the air intake port 158 ​​to the airflow channel 148.

[0113] The intermediate section 104 may include a shield 166. The intermediate section 104 includes a housing 168. The air intake 158 may be an opening within the housing 168.

[0114] During use, the first aerosol-forming substrate or a first aerosol-generating article containing the first aerosol-forming substrate may be inserted into the first cavity 150. Additionally, or by other means, a second aerosol-forming substrate or a second aerosol-generating article containing the second aerosol-forming substrate may be inserted into the second cavity 152. The first aerosol-forming substrate may be different from the second aerosol-forming substrate. The first aerosol-forming substrate may be porous. The second aerosol-forming substrate may be porous. The main body 102 may be connected to the intermediate section 104. The mouthpiece 106 may be connected to the intermediate section 104. Power may be supplied to the first induction coil 154 to heat the first wall portion 140. Power may be supplied to the second induction coil 156 to heat the second wall portion 142. The power supply to the first induction coil 154 may be independent of the power supply to the second induction coil 156. The first wall portion 150 may heat the first aerosol-forming substrate. Heating the first wall portion 150 can cause at least a portion of the first aerosol-forming substrate to volatilize. The second wall portion 152 may heat the second aerosol-forming substrate. Heating the second wall portion 152 can cause at least a portion of the second aerosol-forming substrate to volatilize.

[0115] By providing an aerosol generator in which the first and second induction coils can be operated independently of each other, it may be possible to adjust the user experience. By providing an aerosol generator in which the first and second induction coils can be operated independently of each other, aerosol generation from the first aerosol-forming substrate may be independent of aerosol generation from the second aerosol-forming substrate. By providing an aerosol generator in which the first and second induction coils can be operated independently of each other, the heating profile used to generate aerosols from the first aerosol-forming substrate may be selected to be different from the heating profile used to generate aerosols from the second aerosol-forming substrate.

[0116] When a user inhales through the mouthpiece 106, the airflow may enter the intermediate section 104 through the air intake 158. At least a portion of the airflow flows into the first cavity 150 through the first airflow conduit 160. At least a portion of the airflow flows through at least a portion of the first aerosol-forming substrate if the first aerosol-forming substrate is present in the first cavity 150. If the first aerosol-forming substrate is present in the first cavity 150, the first wall portion 140 may heat the first aerosol-forming substrate and volatilize at least a portion of it. At least a portion of the airflow flows from the first cavity 150 into the airflow channel 148 through the first opening 144. At least a portion of the airflow flows from the first aerosol-forming substrate into the airflow channel 148 through the first opening 144 if the first aerosol-forming substrate is present in the first cavity 150. At least a portion of the airflow flows into the second cavity 152 via the second airflow conduit 162. At least a portion of the airflow flows through at least a portion of the second aerosol-forming substrate if the second aerosol-forming substrate is present in the second cavity 152. If the second aerosol-forming substrate is present in the second cavity 152, the second wall portion 142 may heat the second aerosol-forming substrate and volatilize at least a portion of it. At least a portion of the airflow flows from the second cavity 152 into the airflow channel 148 via the second opening 146. At least a portion of the airflow flows into the airflow channel 148 via the third airflow conduit 164. At least a portion of the airflow flows from the second aerosol-forming substrate into the airflow channel 148 via the second opening 146 if the second aerosol-forming substrate is present in the second cavity 152.

[0117] The airflow may flow from the intermediate section 104 to the mouthpiece 106. At least a portion of the airflow flows from the airflow channel 148 into the chamber 124 of the mouthpiece 106 through the airflow channel opening. At least a portion of the airflow may flow directly from the first cavity 150 into the chamber 124 of the mouthpiece 106 through the first cavity opening. At least a portion of the airflow may flow directly from the second cavity 152 into the chamber 124 of the mouthpiece 106 through the second cavity opening. The airflows through the first cavity 150, the second cavity 152, and the airflow channel 148 may mix within the chamber 124. The aerosol may be delivered to the consumer through the aerosol outlet channel 126.

[0118] Figures 4-6 show the aerosol generator of the present invention, in which a first aerosol-forming article 170 containing a first aerosol-forming substrate and a second aerosol-forming article 172 containing a second aerosol-forming substrate are inserted. The first aerosol-forming article 170 is porous. The second aerosol-forming article 172 is porous. Notes relating to Figures 2 and 3 also apply essentially to Figures 4-6. Structural details of the main body are not shown in Figure 4. Figures 4-6 show the airflow through the device and the aerosol-forming substrate. Figures 4-6 show the selective operation of the first induction coil 154 and the second induction coil 156. Figures 4-6 show the selective volatilization of the first aerosol-forming substrate and the second aerosol-forming substrate. In Figures 4-6, arrows indicate the direction of the airflow through the device and substrate. In Figures 4-6, air is drawn into the air intake 158. As explained with reference to Figure 3, a portion of the airflow moves through the first airflow conduit 160 toward the first cavity 150, through the second airflow conduit 162 toward the second cavity 152, and through the third airflow conduit 164 toward the airflow channel 148.

[0119] In Figure 4, the first wall section 140 and the second wall section 142 are in operation. Power is delivered to the first induction coil 154 to heat the first wall section 140. The first wall section 40 heats the first aerosol-forming substrate, causing at least a portion of the first aerosol-forming substrate to volatilize. Power is delivered to the second induction coil 156 to heat the second wall section 142. The second wall section 142 heats the second aerosol-forming substrate, causing at least a portion of the second aerosol-forming substrate to volatilize. In the example shown in Figure 4, both the first wall section 140 and the second wall section are heated simultaneously.

[0120] At least a portion of the volatilized first aerosol-forming substrate flows directly into the chamber 124 of the mouthpiece 106 through the first cavity opening. At least a portion of the volatilized first aerosol-forming substrate flows into the airflow channel 148 through the first opening 144. The volatilized first aerosol-forming substrate is mixed with the airflow passing through the airflow channel 148. At least a portion of the volatilized second aerosol-forming substrate flows directly into the chamber 124 of the mouthpiece 106 through the second cavity opening and the second cavity 152. At least a portion of the volatilized second aerosol-forming substrate flows into the airflow channel 148 through the second opening 146. The volatilized second aerosol-forming substrate is mixed with the airflow passing through the airflow channel 148. The airflow passing through the airflow channel 148 flows into the chamber 124 of the mouthpiece 106 through the airflow channel opening. The airflow through the first cavity 150, which enters directly into the chamber 124, the airflow through the second cavity 152, which also enters directly into the chamber 124, and the airflow through the airflow channel 148 are mixed within the chamber 124 of the mouthpiece 106. The mixture can be cooled and form an aerosol. The consumer inhales the aerosol through the aerosol outlet channel 126.

[0121] In Figure 5, only the first wall section 140 is operating. Power is delivered to the first induction coil 154 to heat the first wall section 140. The first wall section 40 heats the first aerosol-forming substrate 170, causing at least a portion of the first aerosol-forming substrate to volatilize. No power is delivered to the second induction coil 156.

[0122] At least a portion of the volatile first aerosol-forming substrate flows through the first cavity directly into the chamber 124 of the mouthpiece 106 via the first cavity opening. At least a portion of the volatile first aerosol-forming substrate flows through the first opening 144 into the airflow channel 148, as indicated by reference numeral 174. The volatile first aerosol-forming substrate mixes with the airflow passing through the airflow channel 148. The airflow passing through the airflow channel 148 flows into the chamber 124 via the airflow opening. The airflow passing through the airflow channel 148 and the volatile first aerosol-forming substrate flowing directly into the chamber 124 mix within the chamber 124. The consumer inhales the aerosol through the aerosol outlet channel 126.

[0123] In Figure 6, only the second wall portion 142 is operating. Power is delivered to the second induction coil 156 to heat the second wall portion 142. The second wall portion 142 heats the second aerosol-forming substrate 172, causing at least a portion of the second aerosol-forming substrate to volatilize. No power is delivered to the first induction coil 154.

[0124] At least a portion of the volatilized second aerosol-forming substrate flows directly into the chamber 124 of the mouthpiece 106 through the second cavity opening and the second cavity 152. At least a portion of the volatilized second aerosol-forming substrate flows into the airflow channel 148 through the second opening 146, as indicated by reference numeral 176. The volatilized second aerosol-forming substrate mixes with the airflow through the airflow channel 148. The airflow through the airflow channel 148 flows into the chamber 124 through the airflow channel opening. The airflow through the airflow channel 148 and the volatilized second aerosol-forming substrate flowing directly into the chamber 124 mix within the chamber 124. The mixture may cool and form an aerosol. The consumer inhales the aerosol through the aerosol outlet channel 126.

Claims

1. Aerosol generator, A first cavity configured to receive a first planar aerosol-forming substrate, A second cavity configured to receive a second planar aerosol-forming substrate, Airflow channels and The induction heating arrangement comprises a susceptor element, wherein the susceptor element is disposed between the first cavity and the second cavity, the susceptor element is configured to at least partially define the airflow channel, the susceptor element is configured to fluidly connect the first cavity to the airflow channel, and the susceptor element is configured to fluidly connect the second cavity to the airflow channel. An aerosol generator in which the first cavity is planar and the second cavity is planar.

2. The aerosol generator according to claim 1, wherein the susceptor element is configured to direct the fluid flow from the first cavity to the airflow channel, and the susceptor element is configured to direct the fluid flow from the second cavity to the airflow channel.

3. The aerosol generating apparatus according to any one of claims 1 to 2, wherein the first cavity comprises a first cavity opening configured for the insertion of the first aerosol forming substrate, and the second cavity comprises a second cavity opening configured for the insertion of the second aerosol forming substrate.

4. The aerosol generator according to any one of claims 1 to 3, wherein the susceptor element comprises a wall, the wall of the susceptor element comprises at least a first wall portion and a second wall portion, and the wall is configured to define the airflow channel.

5. The aerosol generator according to claim 4, wherein the first wall portion comprises one or more openings configured to fluidly connect the first cavity to the airflow channel, and the second wall portion comprises one or more openings configured to fluidly connect the second cavity to the airflow channel.

6. The aerosol generating apparatus according to either claim 4 or 5, wherein the first wall portion is disposed in contact with the first cavity, and the second wall portion is disposed in contact with the second cavity.

7. The aerosol generating apparatus according to any one of claims 1 to 6, wherein the induction heating arrangement comprises a first induction coil, preferably a first planar induction coil, and the induction heating arrangement comprises a second induction coil, preferably a second planar induction coil.

8. The aerosol generating apparatus according to claim 7, wherein the apparatus is configured such that the first induction coil and the second induction coil can be controlled independently.

9. The aerosol generator according to any one of claims 7 to 8 and claim 4, wherein the first induction coil is configured to heat the first wall portion, and the second induction coil is configured to heat the second wall portion.

10. The aerosol generator according to any one of claims 7 to 9, wherein the susceptor element is located in the center, the first cavity is located radially outward from the susceptor element, the first induction coil is located radially outward from the first cavity, the second cavity is located radially outward from the susceptor element, the second cavity is located on the opposite side of the first cavity, and the second induction coil is located radially outward from the second cavity.

11. The aerosol generating apparatus according to any one of claims 1 to 10, wherein the apparatus comprises an air intake port, a first airflow conduit, a second airflow conduit, and a third airflow conduit, wherein the first airflow conduit is configured to fluidly connect the air intake port to the first cavity, the second airflow conduit is configured to fluidly connect the air intake port to the second cavity, and the third airflow conduit is configured to fluidly connect the air intake port to the airflow channel.

12. The aerosol generating system comprises an aerosol generating device according to any one of claims 1 to 11, wherein the system includes a first aerosol-forming substrate, preferably a first planar aerosol-forming substrate.

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

14. The aerosol generating system according to claim 13, wherein the first aerosol-forming substrate is configured differently from the second aerosol-forming substrate.

15. The aerosol generating system according to any one of claims 13 to 14, wherein the first aerosol-forming substrate forms a part of a first aerosol-generating article, preferably a part of a first planar aerosol-generating article, the second aerosol-forming substrate forms a part of a second aerosol-generating article, preferably a part of a second planar aerosol-generating article, the first aerosol-generating article is shaped to closely conform to the shape of the first cavity, and the second aerosol-generating article is shaped to closely conform to the shape of the second cavity.

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