Aerosol provision device

Abstract

The aerosol delivery device comprises a coil, a heater component arranged to heat an aerosol-generating material—the heater component can be heated by the coil—an indicator assembly, and a controller. The controller is configured to cause the coil to heat the heater component, and after the coil has heated the heater component, the indicator assembly is configured to indicate that the device is ready for use within a predetermined time period, the predetermined time period being less than about 60 seconds.

Description

Technology Field

[0001] The present invention relates to aerosol providing devices and methods for operating aerosol providing devices. Background Technology

[0002] Smoking articles, such as cigarettes and cigars, burn tobacco during use to produce tobacco smoke. Attempts have been made to provide alternatives to these burning articles by creating products that release compounds without combustion. Examples of such products are heating devices that release compounds by heating a material without burning it. This material can be, for instance, tobacco or other non-tobacco products, and may or may not contain nicotine.

[0003] According to a first aspect of the present disclosure, an aerosol providing device is provided, and the aerosol providing device is,

[0004] coil;

[0005] A heating component arranged to heat the aerosol-generating material — the heating component can be heated by a coil —;

[0006] Indicator assembly; and

[0007] It includes a controller, and the controller,

[0008] The coil heats the heater component; and

[0009] After the coil heats the heater component, the indicator assembly is configured to indicate that the device is ready for use within a predetermined time period, and the predetermined time period is less than about 60 seconds.

[0010] According to another aspect of the present disclosure, an aerosol providing device is provided, and the aerosol providing device is,

[0011] Inductor coil for generating a variable magnetic field;

[0012] A susceptor arranged to heat an aerosol-generating material — the susceptor can be heated by penetration by a variable magnetic field —;

[0013] Indicator assembly; and

[0014] It includes a controller, and the controller,

[0015] The inductor coil generates a variable magnetic field; and

[0016] After the inductor coil generates a variable magnetic field, the indicator assembly is configured to indicate that the device is ready for use within a predetermined time period, and the predetermined time period is about 60 seconds or less.

[0017] According to a second aspect of the present disclosure, an aerosol providing device is provided, and the aerosol providing device is,

[0018] A heater assembly configured to heat an aerosol-generating material;

[0019] Indicator assembly; and

[0020] It includes a controller, and the controller,

[0021] The heater assembly initiates the heating of the aerosol generating material; and

[0022] The indicator assembly is configured to indicate that the device is ready for use within a predetermined time period, and the predetermined time period is about 60 seconds or less after the heater assembly begins to heat the aerosol generating material.

[0023] According to a third aspect of the present disclosure, an aerosol providing device is provided, and the aerosol providing device is,

[0024] coil;

[0025] A heating component arranged to heat the aerosol-generating material — the heating component can be heated by a coil —;

[0026] Indicator assembly; and

[0027] It includes a controller, and the controller,

[0028] The coil causes the heating component to start heating; and

[0029] After the inductor coil starts heating the aerosol generating material, the indicator assembly is configured to indicate that the device has completed or will complete the operation within a predetermined time period.

[0030] According to another aspect of the present disclosure, an aerosol providing device is provided, and the aerosol providing device is,

[0031] Inductor coil for generating a variable magnetic field;

[0032] A susceptor arranged to heat an aerosol-generating material — the susceptor can be heated by penetration by a variable magnetic field —;

[0033] Indicator assembly; and

[0034] It includes a controller, and the controller,

[0035] Causing the inductor coil to start generating a variable magnetic field; and

[0036] After the inductor coil starts heating the aerosol generating material, the indicator assembly is configured to indicate that the device has completed or will complete the operation within a predetermined time period.

[0037] According to a fourth aspect of the present disclosure, a method for operating an aerosol providing device is provided, and the method comprises:

[0038] A step of causing a coil of an aerosol supply device to heat a heater component, and

[0039] After the coil heats the heater component, the method includes the step of having the indicator assembly of the aerosol providing device indicate that the device is ready for use within a predetermined time period, wherein the predetermined time period is less than about 60 seconds.

[0040] According to another aspect of the present disclosure, a method for operating an aerosol providing device is provided, and the method comprises:

[0041] A step of causing the inductor coil of the aerosol delivery device to generate a variable magnetic field to heat the susceptor; and

[0042] After causing the inductor coil to generate a variable magnetic field, the method includes the step of causing the indicator assembly of the aerosol providing device to indicate that the device is ready for use within a predetermined time period, wherein the predetermined time period is about 60 seconds or less.

[0043] According to a fifth aspect of the present disclosure, a method for operating an aerosol providing device is provided, and the method comprises:

[0044] A step of causing a coil of an aerosol supply device to heat a heater component, and

[0045] After the inductor coil heats the heater component, the method includes the step of causing the indicator assembly of the aerosol providing device to indicate that the device has completed or will complete the operation within a predetermined time period.

[0046] According to another aspect of the present disclosure, a method for operating an aerosol providing device is provided, and the method comprises:

[0047] A step of causing the inductor coil of the aerosol delivery device to generate a variable magnetic field to heat the susceptor; and

[0048] The method includes the step of, after the inductor coil assembly heats the susceptor, having the indicator assembly of the aerosol providing device indicate that the device has completed or will complete the operation within a predetermined time period.

[0049] Further features and advantages of the present invention will become apparent from the following description of preferred embodiments of the invention given merely as examples with reference to the accompanying drawings. Brief explanation of the drawing

[0050] Figure 1 shows a front view of an example of an aerosol delivery device. FIG. 2 shows a front view of the aerosol providing device of FIG. 1 with the outer cover removed. Figure 3 shows a cross-sectional view of the aerosol providing device of Figure 1. Figure 4 shows an exploded view of the aerosol providing device of Figure 2. FIG. 5a shows a cross-sectional view of a heating assembly within an aerosol delivery device. Figure 5b shows an enlarged view of a part of the heating assembly of Figure 5a. Figure 6 shows a front view of the device. FIG. 7 shows a perspective view of the housing of the device. FIG. 8 shows a perspective view of a device without a housing. Figure 9 depicts a perspective view of LEDs arranged within a device. FIG. 10 illustrates an external member including a plurality of apertures. Figure 11 illustrates the components of a device arranged on LEDs. FIG. 12 illustrates a system including a controller, a heater assembly, an input interface, and an indicator assembly. FIGS. 13a to 13d illustrate an external member illuminated by a plurality of LEDs. FIG. 14 illustrates a flowchart of a method for operating a device. FIG. 15 illustrates a flowchart of a method for operating a device. Specific details for implementing the invention

[0051] As used herein, the term “aerosol-generating material” typically comprises materials that provide components that volatilize upon heating in the form of an aerosol. The aerosol-generating material comprises any tobacco-retaining material and may comprise, for example, one or more of tobacco, tobacco derivatives, puffed tobacco, reconstituted tobacco, or tobacco substitutes. The aerosol-generating material may also comprise other non-tobacco products that may or may not contain nicotine depending on the product. The aerosol-generating material may be in the form of, for example, a solid, liquid, gel, wax, etc. The aerosol-generating material may also be, for example, a combination or blend of materials. The aerosol-generating material may also be known as a “smoking-capable material.”

[0052] Typically, a device is known for heating an aerosol-generating material to volatilize at least one component of the aerosol-generating material in order to form an aerosol that can be inhaled without burning or combusting the aerosol-generating material. Such a device is sometimes described as an "aerosol-generating device," an "aerosol-giving device," a "heat-not-burn device," a "tobacco heating product device," or a "tobacco heating device," etc. Similarly, there are also so-called e-cigarette devices that typically vaporize the aerosol-generating material in the form of a liquid that may or may not contain nicotine. The aerosol-generating material may be in the form of a rod, cartridge, or cassette that can be inserted into the device, or may be provided as part of a rod, cartridge, or cassette. A heater for heating and volatilizing the aerosol-generating material may be provided as a "permanent" part of the device.

[0053] An aerosol delivery device may accommodate an article comprising an aerosol generating material for heating. In this context, the “article” is a component comprising or containing an aerosol generating material that is heated to volatilize the aerosol generating material upon use, and optionally other components upon use. A user may insert the article into the aerosol delivery device before the article is heated to generate an aerosol, and subsequently, the user inhales the aerosol. The article may be of a predetermined or specific size, for example, configured to be placed within a heating chamber of a device sized to accommodate the article.

[0054] A first aspect of the present disclosure defines an aerosol-providing device comprising an indicator assembly configured to provide an indication that the device is ready for use within a predetermined time period after a coil, such as an inductor coil, has heated a heating component, such as a susceptor. As discussed in more detail herein, the susceptor is an electrically conductive object which can be heated by penetration through a variable magnetic field. The inductor coil generates a variable magnetic field that causes the susceptor to heat. When heated, the susceptor transfers heat to an aerosol-producing material, which releases an aerosol. In one example, the susceptor defines a receptacle and the susceptor receives the aerosol-producing material.

[0055] It has been found that certain heating systems can heat the aerosol generating material to an appropriate temperature within a reduced time period compared to other types of heating assemblies. Accordingly, the user of the device can inhale the device to inhale the aerosol within a time period of less than about 60 seconds. To ensure that the user recognizes that the device is ready for use, the aerosol dispensing device includes an indicator assembly to indicate that the device is ready for the user to inhale the aerosol. Because the inductor coil can rapidly heat the susceptor and the aerosol generating material, the aerosol generating material will release a sufficient amount of aerosol when the device indicates that it is ready.

[0056] "Ready to be used" may mean that the aerosol generating material has reached a desired / sufficient temperature, or that the aerosol generating material has generated a desired / sufficient volume of aerosol, or that the user can "puff" the device for the first time to inhale the aerosol generated by the aerosol generating material.

[0057] References to "within a predetermined period" include examples where an indicator provides an indication within a predetermined period. For example, the characteristics of an article used with an aerosol dispensing device and the heating applied by the aerosol dispensing device may be known so that the time when it becomes "ready for use" can be predetermined. This also includes examples where certain characteristics of the aerosol dispensing device and / or the article are monitored to determine whether the article is ready for use. For example, a temperature sensor measuring a predetermined temperature or a temperature above that may indicate that the device is ready for use.

[0058] In some examples, the predetermined time period is less than about 50 seconds, less than about 40 seconds, less than about 30 seconds, less than about 20 seconds, less than about 15 seconds, or less than about 10 seconds after the coil heats the heater component. Induction heating systems may be more efficient at heating aerosol-generating materials. In induction heating systems, the predetermined time may be less than about 20 seconds.

[0059] In some examples, the coil is an inductor coil and the heater component is a susceptor. The controller may be configured to cause the coil to heat the heater component by causing the inductor coil to generate a variable magnetic field. The susceptor may be heated by the penetration of the variable magnetic field.

[0060] The device may be configured to operate in one of a first mode and a second mode, and when the device is operated in the second mode, the inductor coil is configured to heat the aerosol generating material to a higher temperature than when the device is operated in the first mode, and the predetermined time period is a first predetermined time when the device is operating in the first mode and a second predetermined time when the device is operating in the second mode, and the second predetermined time is different from the first predetermined time.

[0061] Accordingly, in some examples, the device may be operated in different modes. In a first mode, for example, an inductor coil may be configured to heat the susceptor to a first temperature. In a second mode, for example, an inductor coil may be configured to heat the susceptor to a second temperature. In some examples, the second temperature is higher than the first temperature. The first and second temperatures may be average temperatures of the susceptor measured during a single session.

[0062] The first temperature may be about 240°C to about 260°C, and the second temperature may be about 270°C to about 290°C. The temperature of the aerosol-generating material may be slightly lower than the temperature of the susceptor.

[0063] The first mode may be known as the default mode, and the second mode may be known as the boost mode. The second mode can, for example, produce a higher volume or aerosol concentration than the first mode.

[0064] In certain examples, the second predetermined time is shorter than the first predetermined time. For instance, if the aerosol generating material is heated to a higher temperature, the aerosol generating material may release aerosols faster than when heated to a lower temperature. This may mean that the device is ready for use more quickly.

[0065] In another example, the device may be configured to operate in one of a first mode and a second mode, and when the device is operated in the second mode, the inductor coil is configured to heat the susceptor to a higher temperature than when the device is operated in the first mode, and the predetermined time period is a first predetermined time when the device is operating in the first mode and a second predetermined time when the device is operating in the second mode, and the second predetermined time is less than the first predetermined time.

[0066] In some examples, the indicator assembly may display the selected heating mode. In some examples, this display is the same as the display indicating that the device is ready for use. Thus, the type of display used to indicate that the device is ready for use may be based on the mode in which the device is operating. In other examples, the display indicating the mode may occur after a specific mode is selected but before the device is ready for use. Thus, two distinct displays may occur. The first display may indicate the heating mode, and the second display may indicate that the device is ready for use. This allows the user to cancel heating if they accidentally select the wrong mode. In certain examples, the first display is provided by a haptic component, and the second display is provided by a visual component. This is useful because the user may hold the device when selecting the heating mode, but can place the device on a surface while waiting for it to be ready for use. The visual display is more easily visible when the user is no longer holding the device.

[0067] The device may further include an input interface, and the controller is configured to cause an inductor coil to generate a variable magnetic field in response to an input received from the input interface. Thus, the user can interact with or operate the input interface to cause the device to start heating.

[0068] Additionally, the input interface may be referred to as a user interface. The input interface may be a button, touch screen, dial, knob, or a wireless connection to a mobile device (e.g., using Bluetooth).

[0069] In a specific example, the input interface includes a button, and the input includes a signal indicating that the button is released. Thus, the inductor coil begins heating the susceptor only when the button is released. While the user is pressing the button, the inductor coil may not heat the susceptor. Thus, a predetermined time period begins when the user releases the button. The button may be a software button or a hardware button. The signal may be a single signal or two or more signals.

[0070] In certain examples, the input further includes a signal indicating the duration the button has been pressed, and the controller is configured to cause the inductor coil to generate a variable magnetic field in response to (i) receiving a signal indicating that the button has been released and (ii) determining that the duration the button has been pressed is equal to or greater than a threshold time period. The signal indicating the duration the button has been pressed may be part of the same signal indicating that the button has been released, or it may be a separate signal. Thus, in some examples, the inductor coil may start heating the susceptor only when the button is pressed for a specific length of time that is greater than or equal to the threshold time period. In certain examples, the threshold time period is 3 seconds or 5 seconds. If the button is held and released for less than the threshold time period, the inductor coil may not start heating the susceptor. This avoids heating the susceptor in the event that the user accidentally presses the button—which can waste energy. Therefore, if the controller determines that the length of time the button is pressed is less than a threshold, the controller determines that the inductor coil does not generate a variable magnetic field.

[0071] In one example, the device is configured to operate in a first mode when the duration of time the button is pressed is greater than or equal to a first threshold time period and less than a second threshold time period, and the device is configured to operate in a second mode when the duration of time the button is pressed is greater than or equal to a second threshold time period. For example, the first threshold time period may be 3 seconds, and the second threshold time period may be 5 seconds. Thus, using a single button, the user can select different modes. Having a single interface for selecting multiple modes can simplify the operation of the device and reduce the number of components. The reduced number of components can make the device lighter, and there are fewer parts that may break or cease functioning.

[0072] The device may include a puff detector for detecting when a user puffs the device, and the controller is configured to cause an inductor coil to generate a variable magnetic field in response to the puff detector that detects when a user puffs the device. Thus, when a user inhales on the device, the device can automatically start heating.

[0073] In some examples, the indicator assembly provides an indication that the inductor coil has started generating a variable magnetic field. This allows the user to avoid attempting to restart the device's operation.

[0074] In one array, the indicator assembly includes a visual component configured to provide a visual indication that the device is ready for use. For example, the visual component may include, for example, an LED that moves to display one or more patterns, a plurality of LEDs, a display, an eInk display, or a mechanical element. In some examples, the visual component is configured to emit light.

[0075] In a specific example, the indicator assembly includes a plurality of LEDs, and the number of illuminated LEDs indicates when the device is ready for use. For example, when the inductor coil first begins to generate a variable magnetic field, a first number of LEDs may be illuminated, and when the device is ready for use, a second number of LEDs may be illuminated, and the second number is greater than the first number. The first number of LEDs may be zero. The second number may be all LEDs. Thus, the indicator assembly can indicate the degree to which the device is ready for use. The LEDs may be illuminated sequentially over a predetermined time period.

[0076] In a specific example, there are four LEDs, and the LEDs are illuminated sequentially for a predetermined time period. For example, the first LED may be illuminated for 5 seconds after the inductor coil generates a magnetic field, the second LED may be illuminated for 10 seconds after the inductor coil generates a magnetic field, the third LED may be illuminated for 15 seconds after the inductor coil generates a magnetic field, and the fourth LED may be illuminated for 20 seconds after the inductor coil generates a magnetic field. The illumination of the final LED may indicate that the device is ready for use. Previously illuminated LEDs may remain illuminated when the next LED is illuminated. Alternatively, the previous LEDs may be switched off as subsequent LEDs are illuminated.

[0077] In another example, the indicator assembly includes a haptic component configured to provide haptic feedback to indicate that the device is ready for use. For example, the haptic component may be a haptic motor that causes the device to vibrate when the device is ready for use. In some examples, the haptic component provides haptic feedback according to a first pattern after an inductor coil generates a variable magnetic field, and provides haptic feedback according to a second pattern when the device is ready for use. The first pattern may continue until the device is ready for use or may end after a short period of time. Accordingly, the haptic component may also indicate that the device has started heating the aerosol-generating material so that the user is aware that the device is operating.

[0078] In another example, the indicator assembly includes an audible indicator configured to emit sound to indicate that the device is ready for use. The audible indicator may be a transducer, a buzzer, a beeper, etc.

[0079] In a specific example, the indicator assembly includes a haptic component and a visual component. The haptic component may be configured to provide a haptic indication that the inductor coil has started to generate a variable magnetic field. The visual component may be configured to provide a visual indication that the device is ready for use.

[0080] In some examples, the indicator assembly is configured to display the time remaining until the device completes the operation. For example, the indicator assembly may provide different indications depending on the time remaining until the device completes the operation. The device may "complete the operation" at the point when the inductor coil stops generating a variable magnetic field, or at the point when the aerosol temperature / volume is considered to drop below an acceptable level—which may be a few seconds after the point when the inductor coil stops generating a magnetic field.

[0081] In a specific example, the indicator assembly includes a plurality of LEDs, and the number of illuminated LEDs indicates the time remaining until the device completes its operation. For example, when the device is operating, a first number of LEDs may be illuminated, and when the device completes its operation, a second number of LEDs may be illuminated, and the second number is smaller than the first number. The second number may be, for example, zero. The first number may be all of the LEDs. Thus, the LEDs may "count down" as the device approaches completion.

[0082] In a specific example, there are multiple LEDs, such as four LEDs, and the LEDs are switched off sequentially as the end of the heating session approaches. For example, all four LEDs may be lit for 20 seconds before the device completes its operation. If only 15 seconds remain, one of the four LEDs may be switched off. If only 10 seconds remain, another LED may be switched off. If only 5 seconds remain, another LED may be switched off, and if 0 seconds remain, all four LEDs may be switched off.

[0083] In another example, the haptic component can provide different haptic feedback patterns depending on the remaining time. For instance, the haptic component can provide haptic feedback to indicate that a specific period of time remains. The type of haptic feedback can indicate how much time is left. For instance, when 20 seconds remain, there may be short, low-intensity haptic feedback, and when 5 seconds or 0 seconds remain, the haptic feedback may be longer and stronger.

[0084] In an additional example, an audible indicator can provide different sounds depending on the remaining time. For instance, pitch, tone, sound patterns, etc., can change over time.

[0085] In another example, the controller is configured such that, after the inductor coil generates a variable magnetic field, the indicator assembly indicates that the device has completed or will complete an operation within a third predetermined time period. Thus, the indicator assembly can indicate the moment the indicator assembly has completed an operation or is about to complete an operation. For example, when the device completes an operation, the visual indicator may no longer provide any visual indication. In a specific example, all LEDs may be switched off when the device has completed an operation or is about to complete an operation. This indicates to the user that suction from the device must be stopped. The third predetermined time is longer than the first or second predetermined time described above. The third predetermined time may be, for example, 3 minutes, 3 minutes and 30 seconds, or 4 minutes. The third predetermined time may depend on the mode in which the device is operating.

[0086] The device may define a longitudinal axis. In some examples, the inductor coil is a first inductor coil, and the device further includes a second inductor coil for generating a second variable magnetic field. In a particular arrangement, the first inductor coil is adjacent to the second inductor coil in a direction along the longitudinal axis, and the controller is configured so that the second inductor coil generates the second variable magnetic field after the indicator assembly indicates that the device is ready for use. In use, the aerosol is drawn along the flow path of the device toward the proximal end of the device, and the first inductor coil is arranged closer to the proximal end of the device than the second inductor coil.

[0087] Accordingly, the device may include two inductor coils, with the first inductor coil being closer to the mouse end of the device. Thus, the first inductor coil heats the aerosol generating material closer to the user's mouth. Initially, the first inductor coil is activated. The second inductor coil may be activated later. For example, the controller may cause the second inductor coil to generate a second magnetic field at a fourth predetermined time after the first inductor coil has generated a first magnetic field. The fourth predetermined time may be, for example, about 40 seconds to about 60 seconds. The fourth predetermined time may depend on the mode in which the device is operating.

[0088] While the first inductor coil continues to generate a first magnetic field, the second inductor coil can generate a second magnetic field.

[0089] In a specific example, the first inductor coil has a first length, and the second inductor coil has a second length, and the first length is shorter than the second length. The shorter length heats a lower volume of aerosol-generating material, which generates a lower volume of aerosol, thereby reducing the phenomenon known as "hot puff."

[0090] In another aspect, a method for operating the aerosol delivery device described above is provided. The method comprises the steps of causing an inductor coil of the aerosol delivery device to generate a variable magnetic field to heat a susceptor, and, after causing the inductor coil to generate a variable magnetic field, causing an indicator assembly of the aerosol delivery device to indicate that the device is ready for use within a predetermined time period, wherein the predetermined time period is less than about 20 seconds.

[0091] In some examples, the device may be configured to operate in one of a first mode and a second mode, and the method comprises the step of operating the device in a second mode by inducing an inductor coil to heat the aerosol generating material to a higher temperature than when the device is operated in the first mode, and the predetermined time period is a first predetermined time when the device is operated in the first mode and a second predetermined time when the device is operated in the second mode, and the second predetermined time is different from the first predetermined time.

[0092] In another example, the device is configured to operate in one of a first mode and a second mode, and the method comprises the step of operating the device in a second mode by causing an inductor coil to heat a susceptor to a higher temperature than when the device is operated in the first mode, and the predetermined time period is a first predetermined time when the device is operating in the first mode and a second predetermined time when the device is operating in the second mode, and the second predetermined time is less than the first predetermined time.

[0093] The method may further include the step of causing an inductor coil to generate a variable magnetic field in response to receiving an input from the input interface of the device.

[0094] The input interface may include a button, and the input includes (i) a signal indicating that the button is released, and (ii) the length of time the button is pressed. The method may further include the steps of causing an inductor coil to generate a variable magnetic field in response to receiving the signal, and determining that the length of time the button is pressed is greater than or equal to a threshold time period.

[0095] The method may further include the step of causing an inductor coil to generate a variable magnetic field in response to a puff detector that detects that a user puffs the device.

[0096] The method may further include a step in which the indicator assembly displays the remaining time until the device completes the operation.

[0097] The method may further include the step of causing the inductor coil to generate a variable magnetic field, and then causing the indicator assembly to indicate that the device has completed or will complete the operation within a third predetermined time period.

[0098] In one array, the inductor coil is a first inductor coil, and the device further comprises a second inductor coil for generating a second variable magnetic field. The first inductor coil may be adjacent to the second inductor coil in a direction along a longitudinal axis, and in use, an aerosol is drawn along the flow path of the device toward the proximal end of the device, and the first inductor coil is arranged closer to the proximal end of the device than the second inductor coil. The method may further include the step of causing the second inductor coil to generate a second variable magnetic field after an indicator assembly indicates that the device is ready for use.

[0099] Although this method is described in relation to inductive heaters, it will be understood that this method can also be applied to devices having non-inductive heater assemblies. For example, instead of an inductor coil, the device may include a heater assembly configured to heat an aerosol-generating material.

[0100] In a second embodiment, the aerosol providing device comprises a heater assembly configured to heat an aerosol generating material, an indicator assembly, and a controller. The controller is configured to cause the heater assembly to start heating the aerosol generating material and for the indicator assembly to indicate that the device is ready for use within a predetermined time, the predetermined time period being less than about 20 seconds after the heater assembly starts heating the aerosol generating material.

[0101] Accordingly, in some examples, the device may include a non-inductive heater assembly. For example, the heater assembly may include resistive heating components configured to heat the aerosol generating material. The features described above in relation to the first aspect may be applied to the aerosol providing device of the second aspect.

[0102] In a third aspect, the aerosol delivery device comprises an inductor coil for generating a variable magnetic field, a susceptor arranged to heat the aerosol-generating material—the susceptor is capable of heating by penetration by the variable magnetic field—an indicator assembly, and a controller. The controller is configured to cause the inductor coil to generate a variable magnetic field and, after the inductor coil begins heating the aerosol-generating material, to cause the indicator assembly to indicate that the device has completed or will complete the operation within a predetermined time period. Thus, the user can be notified when the device has completed or is about to complete the operation. This causes the user to stop using the device when the generated aerosol no longer has a sufficient volume, concentration, or temperature.

[0103] In another aspect, a method for operating an aerosol providing device comprises the steps of: causing an inductor coil of the aerosol providing device to generate a variable magnetic field for heating a susceptor; and, after the inductor coil assembly starts heating an aerosol generating material, causing an indicator assembly of the aerosol providing device to indicate that the device has completed or will complete the operation within a predetermined time period.

[0104] Although this method is described in relation to inductive heaters, it will be understood that this method can also be applied to devices having non-inductive heater assemblies. For example, instead of an inductor coil, the device may include a heater assembly configured to heat an aerosol-generating material.

[0105] In a specific example, the indicator assembly comprises one or more light-emitting diodes (LEDs) and an external member positioned above one or more LEDs. The external member comprises a plurality of apertures visible from the outside of the aerosol providing device. Electromagnetic radiation (e.g., in the form of visible light) can pass through the plurality of apertures and can be seen by a user. At least a portion of the external member may form the outer surface of the device.

[0106] The indicator assembly may further include a light-shaping member positioned between one or more LEDs and an external member. The light-shaping member may include one or more light pipes for guiding light through the light-shaping member to produce a specific pattern or design. The light-shaping member may include opaque zones configured to block some of the light from the LEDs. The light-shaping member may include transparent or translucent zones to allow light to pass through. Alternatively, the light-shaping member may include openings that allow light to pass through. A light-shaping member including opaque zones and transparent or translucent zones may be more rigid than a light-shaping member having openings. Translucent zones may also additionally diffuse / soften the light.

[0107] In some examples, the light-forming member is formed from two or more overmolded components. For example, opaque and transparent / translucent zones may be formed from two overmolded components.

[0108] In one example, the light-forming member includes an opaque region extending around the periphery / periphery / circumference of the light-forming member. This can prevent light from leaking to the outer periphery of the outer member. The opaque region may be an outer ring.

[0109] In one example, the opaque area is colored black or dark gray.

[0110] In one example, the opaque area is cross-shaped.

[0111] In a specific example, the device includes four LEDs, each of the four LEDs is positioned below a light-forming member and is positioned between adjacent opaque zones so that light from the LEDs is separated into four quadrants. The opaque zones are configured to prevent light bleed from one quadrant to an adjacent quadrant.

[0112] Preferably, the device is a tobacco heating device also known as a non-combustion heating device.

[0113] As briefly mentioned above, in some examples, the coil(s) are configured to cause heating of at least one electrically conductive heating component / element (also known as a heater component / element) when in use, and accordingly, to conduct thermal energy from at least one electrically conductive heating component to an aerosol generating material, thereby causing heating of the aerosol generating material.

[0114] In some examples, the coil(s) are configured to generate a variable magnetic field to penetrate at least one heating component / element when in use, thereby causing inductive heating and / or magnetic hysteresis heating of at least one heating component. In such an array, the or each heating component may be referred to as a "susceptor." A coil configured to generate a variable magnetic field to penetrate at least one electrically conductive heating component when in use, thereby causing inductive heating of at least one electrically conductive heating component, may be referred to as an "induction coil" or "inductor coil."

[0115] The device may include heating component(s), for example, electrically conductive heating component(s), and the heating component(s) may be appropriately positioned or positioned relative to the coil(s) to enable such heating of the heating component(s). The heating component(s) may be in a fixed position relative to the coil(s). Alternatively, at least one heating component, for example, at least one electrically conductive heating component, may be included in an article for insertion into the heating zone of the device, and the article may also include an aerosol-generating material and be removable from the heating zone after use. Alternatively, both the device and such article may include at least one individual heating component, for example, at least one electrically conductive heating component, and the coil(s) may cause heating of the heating component(s) of the device and article, respectively, when the article is in the heating zone.

[0116] In some examples, the coil(s) are helical. In some examples, the coil(s) surround at least a portion of a heating zone of a device configured to accommodate an aerosol-generating material. In some examples, the coil(s) are helical coil(s) that surround at least a portion of the heating zone. The heating zone may be a receptacle molded to accommodate the aerosol-generating material.

[0117] In some examples, the device includes an electrically conductive heating component that at least partially surrounds the heating zone, and the coil(s) are spiral coil(s) that surround at least a portion of the electrically conductive heating component. In some examples, the electrically conductive heating component is tubular. In some examples, the coil is an inductor coil.

[0118] FIG. 1 illustrates an example of an aerosol providing device (100) for generating an aerosol from an aerosol generating medium / material. Approximately, the device (100) may be used to generate an aerosol or other inhalable medium by heating a replaceable article (110) containing an aerosol generating medium to be inhaled by a user of the device (100).

[0119] The device (100) includes a housing (102) (in the form of an outer cover) that surrounds and houses various components of the device (100). The device (100) has an opening (104) at one end, through which an article (110) can be inserted for heating by a heating assembly. In use, the article (110) can be inserted completely or partially into the heating assembly, and the article (110) can be heated by one or more components of the heating assembly.

[0120] The device (100) of this example includes a first end member (106) comprising a cover (108), the cover (108) being movable relative to the first end member (106) to close the opening (104) when the article (110) is not in place. In FIG. 1, the cover (108) is shown in an open configuration, but the cap (108) can be moved to a closed configuration. For example, the user can cause the cover (108) to slide in the direction of arrow “A”.

[0121] The device (100) may also include an input interface (112) that may include a button or switch that operates the device (100) when pressed. For example, a user may turn on the device (100) by operating the input interface (112).

[0122] The device (100) may also include an electrical connector / component, such as a socket / port (114), capable of receiving a cable for charging the battery of the device (100). For example, the socket (114) may be a charging port, such as a USB charging port. In some examples, the socket (114) may be used additionally or alternatively to transfer data between the device (100) and another device, such as a computing device.

[0123] FIG. 2 depicts the device (100) of FIG. 1 with the outer cover (102) removed and the article (110) not present. The device (100) defines a longitudinal axis (134).

[0124] As illustrated in FIG. 2, a first end member (106) is arranged at one end of the device (100) and a second end member (116) is arranged at the opposite end of the device (100). The first and second end members (106, 116) together define at least partially the end surfaces of the device (100). For example, the lowest surface of the second end member (116) defines at least partially the lowest surface of the device (100). The edges of the outer cover (102) may also define part of the end surfaces. In this example, the cover (108) also defines part of the uppermost surface of the device (100).

[0125] The end of the device closest to the opening (104) may be known as the proximal end (or mouse end) of the device (100) because it is closest to the user's mouth during use. During use, the user inserts the item (110) into the opening (104), operates the user control unit (112) to start heating the aerosol generating material, and inhales the aerosol generated from the device. This causes the aerosol to flow through the device (100) along a flow path toward the proximal end of the device (100).

[0126] The other end of the device furthest from the opening (104) may be known as the distal end of the device (100) because it is the end furthest from the user's mouth during use. As the user inhales the aerosol generated from the device, the aerosol flows away from the distal end of the device (100).

[0127] The device (100) further includes a power source (118). The power source (118) may be, for example, a battery, such as a rechargeable battery or a non-rechargeable battery. Examples of suitable batteries include, for example, a lithium battery (such as a lithium-ion battery), a nickel battery (such as a nickel-cadmium battery), and an alkaline battery. The battery is electrically coupled to a heating assembly to supply electric power when needed under the control of a controller (not shown) for heating the aerosol generating material. In this example, the battery is connected to a central support (120) that holds the battery (118) in place. The central support (120) may also be known as a battery support or a battery carrier.

[0128] The device further includes at least one electronic module (122). The electronic module (122) may include, for example, a printed circuit board (PCB). The PCB (122) may support at least one controller, such as a processor, and memory. The PCB (122) may also include one or more electrical tracks to electrically connect various electronic components of the device (100) to one another. For example, battery terminals may be electrically connected to the PCB (122) so that power can be distributed throughout the device (100). A socket (114) may also be electrically connected to the battery via the electrical tracks.

[0129] In an exemplary device (100), the heating assembly is an induction heating assembly and includes various components for heating an aerosol-generating material of an article (110) through an induction heating process. Induction heating is a process of heating an electrically conductive object (e.g., a susceptor) by electromagnetic induction. The induction heating assembly may include an inductive element, e.g., one or more inductor coils, and a device for delivering a variable current, such as an alternating current, through the inductive element. The variable current of the inductive element generates a variable magnetic field. The variable magnetic field penetrates a susceptor appropriately positioned relative to the inductive element and generates eddy currents within the susceptor. The susceptor has electrical resistance to the eddy currents, and thus the flow of eddy currents against this resistance causes the susceptor to be heated by Joule heating. In cases where the susceptor comprises ferromagnetic materials, such as iron, nickel, or cobalt, heat can also be generated by magnetic hysteresis losses within the susceptor—that is, by various orientations of magnetic dipoles in the magnetic material resulting from the alignment of magnetic dipoles with a variable magnetic field. In induction heating, compared to heating by conduction, for example, heat is generated within the susceptor, allowing for rapid heating. Furthermore, since no physical contact is required between the induction heater and the susceptor, improved freedom in configuration and application is permitted.

[0130] The induction heating assembly of the exemplary device (100) comprises a susceptor array (132) (referred to herein as "susceptor"), a first inductor coil (124), and a second inductor coil (126). The first and second inductor coils (124, 126) are made of an electrically conductive material. In this example, the first and second inductor coils (124, 126) are made of Litz wire / cable wound in a spiral shape to provide spiral inductor coils (124, 126). The Litz wire comprises a plurality of individual wires that are individually insulated and twisted together to form a single wire. The Litz wires are designed to reduce skin effect losses in the conductor. In the example of the device (100), the first and second inductor coils (124, 126) are made of copper Litz wire having a rectangular cross-section. In other examples, the Litz wire can have a cross-section of a different shape, such as a circle.

[0131] The first inductor coil (124) is configured to generate a first variable magnetic field for heating a first section of the susceptor (132), and the second inductor coil (126) is configured to generate a second variable magnetic field for heating a second section of the susceptor (132). In this example, the first inductor coil (124) is adjacent to the second inductor coil (126) in a direction along the longitudinal axis (134) of the device (100) (i.e., the first and second inductor coils (124, 126) do not overlap). The susceptor array (132) may include a single susceptor or two or more distinct susceptors. The ends (130) of the first and second inductor coils (124, 126) may be connected to the PCB (122).

[0132] It will be understood that the first and second inductor coils (124, 126) may have at least one different characteristic from one another in some examples. For instance, the first inductor coil (124) may have at least one different characteristic from the second inductor coil (126). More specifically, in one example, the first inductor coil (124) may have an inductance value different from that of the second inductor coil (126). In FIG. 2, the first and second inductor coils (124, 126) have different lengths so that the first inductor coil (124) is wound on a smaller section of the susceptor (132) than the second inductor coil (126). Thus, the first inductor coil (124) may have a different number of turns than the second inductor coil (126) (assuming the spacing between individual turns is substantially the same). In another example, the first inductor coil (124) may be made of a different material than the second inductor coil (126). In some examples, the first and second inductor coils (124, 126) may be substantially the same.

[0133] In this example, the first inductor coil (124) and the second inductor coil (126) are wound in opposite directions. This can be useful when the inductor coils are activated at different times. For example, initially, the first inductor coil (124) may be operating to heat a first section of the article (110), and later, the second inductor coil (126) may be operating to heat a second section of the article (110). Winding the coils in opposite directions helps to reduce the current induced in the inactive coil when used with a specific type of control circuit. In FIG. 2, the first inductor coil (124) is a right-handed spiral and the second inductor coil (126) is a left-handed spiral. However, in other embodiments, the inductor coils (124, 126) may be wound in the same direction, or the first inductor coil (124) may be a left-handed spiral and the second inductor coil (126) may be a right-handed spiral.

[0134] The susceptor (132) in this example is hollow and thus defines a receptacle into which an aerosol-generating material is received. For example, an article (110) can be inserted into the susceptor (132). In this example, the susceptor (120) is tubular with a circular cross-section.

[0135] The device (100) of FIG. 2 further comprises an insulating member (128) which is generally tubular and can at least partially surround the susceptor (132). The insulating member (128) may be composed of any insulating material, such as plastic. In this particular example, the insulating member is composed of PEEK (polyether ether ketone). The insulating member (128) can help insulate various components of the device (100) from heat generated in the susceptor (132).

[0136] The insulating member (128) may also fully or partially support the first and second inductor coils (124, 126). For example, as shown in FIG. 2, the first and second inductor coils (124, 126) are positioned around the insulating member (128) and come into contact with the radially outer surface of the insulating member (128). In some examples, the insulating member (128) does not come into contact with the first and second inductor coils (124, 126). For example, a small gap may exist between the outer surface of the insulating member (128) and the inner surface of the first and second inductor coils (124, 126).

[0137] In a specific example, the susceptor (132), the insulating member (128), and the first and second inductor coils (124, 126) are coaxial with the central longitudinal axis of the susceptor (132).

[0138] FIG. 3 illustrates a side view of the device (100) in partial cross-section. An outer cover (102) is present in this example. The rectangular cross-sectional shape of the first and second inductor coils (124, 126) is more clearly visible.

[0139] The device (100) further includes a support member (136) that engages with one end of the susceptor (132) to hold the susceptor (132) in place. The support member (136) is connected to a second end member (116).

[0140] The device may also include a second printed circuit board (138) associated within the input interface (112).

[0141] The device (100) further comprises a second cover / cap (140) and a spring (142) arranged toward the distal end of the device (100). The spring (142) allows the second cover (140) to be opened to provide access to the susceptor (132). A user may open the second cover (140) to clean the susceptor (132) and / or the support (136).

[0142] The device (100) further includes an extension chamber (144) extending away from the proximal end of the susceptor (132) toward the opening (104) of the device. A retaining clip (146) for holding an article (110) in contact with it when received within the device (100) is located at least partially within the extension chamber (144). The extension chamber (144) is connected to the end member (106).

[0143] FIG. 4 is an exploded view of the device (100) of FIG. 1 with the outer cover (102) omitted.

[0144] FIG. 5a depicts a cross-sectional view of a portion of the device (100) of FIG. 1. FIG. 5b depicts an enlarged view of the area of ​​FIG. 5a. FIG. 5a and 5b illustrate an article (110) housed within a susceptor (132), and the article (110) is dimensioned such that the outer surface of the article (110) contacts the inner surface of the susceptor (132). This ensures that heating is performed most efficiently. The article (110) of this example includes an aerosol-generating material (110a). The aerosol-generating material (110a) is positioned within the susceptor (132). The article (110) may also include other components such as filters, packaging materials, and / or cooling structures.

[0145] FIG. 5b illustrates that the outer surface of the susceptor (132) is spaced apart from the inner surface of the inductor coils (124, 126) by a distance (150) measured in a direction perpendicular to the longitudinal axis (158) of the susceptor (132). In one particular example, the distance (150) is about 3 mm to 4 mm, about 3 mm to 3.5 mm, or about 3.25 mm.

[0146] FIG. 5b further illustrates that the outer surface of the insulating member (128) is spaced apart from the inner surface of the inductor coils (124, 126) by a distance (152) measured in a direction perpendicular to the longitudinal axis (158) of the susceptor (132). In one specific example, the distance (152) is about 0.05 mm. In another example, the distance (152) is substantially 0 mm, and accordingly, the inductor coils (124, 126) come into contact with the insulating member (128).

[0147] In one example, the susceptor (132) has a wall thickness (154) of about 0.025 mm to 1 mm, or about 0.05 mm.

[0148] In one example, the susceptor (132) has a length of about 40 mm to 60 mm, about 40 mm to 45 mm, or about 44.5 mm.

[0149] In one example, the insulating member (128) has a wall thickness (156) of about 0.25 mm to 2 mm, about 0.25 mm to 1 mm, or about 0.5 mm.

[0150] FIG. 6 depicts a front view of the device (100). As briefly mentioned above, the device may include an input interface (112). In some examples, a user may interact with the input interface (112) to operate the device (100). An indicator assembly may be arranged in close proximity to the input interface (112), and the indicator assembly may indicate to the user the occurrence of one or more situations, such as when the device is ready to be used and / or when the device has completed an operation. The indicator assembly may also indicate the mode in which the device (100) is operating.

[0151] FIG. 6 depicts an external member (202) positioned above (i.e., in front) the indicator assembly. In other examples, the indicator assembly may be positioned elsewhere on the device. In the examples described herein, the indicator assembly includes a visual component configured to provide a visual indication. The visual component includes a plurality of LEDs that emit electromagnetic radiation, such as light, to indicate specific situations to the user. It will be understood that the indicator assembly may additionally or alternatively include a haptic component or an audible indicator. In the device (100), the indicator assembly includes a visual component and a haptic component.

[0152] The external member (202) forms the outermost component of the input interface (112). A user can press the external member (202) to interact with the device (100). As will be described in more detail below, the external member (202) includes a plurality of apertures (204) through which light from a plurality of LEDs can pass.

[0153] FIG. 7 depicts a housing (102) (also known as an outer cover) of a device (100). The housing (102) defines the scope of an opening (206). An external member (not shown in FIG. 7) may be arranged within the opening (206). For example, the external member may be arranged at the same height as the outer surface of the housing (102), or may rise above or below the outer surface of the housing (102).

[0154] FIG. 8 depicts a device (100) without a housing (102) in place. In this example, an external member (202) is bonded to a photoforming member (210) through an adhesive layer (208). The adhesive within the adhesive layer (208) may partially or completely cover the inner surface of the external member (202). A sealing member (212) extends around the photoforming member (210).

[0155] In some examples, the outer member (202), adhesive layer (208), light-forming member (210), and sealing member (212) may be omitted from the device.

[0156] FIG. 9 depicts a device (100) with the outer member (202), light-forming member (210), and sealing member (212) removed. The device (100) includes a visual component comprising four LEDs (214), but in other examples, there may be a different number of LEDs, such as one or more LEDs (214). The LEDs (214) are positioned below the outer member (202) so that light travels from the LEDs (214) through a plurality of apertures (204) formed in the outer member (202). Thus, light also passes through the light-forming member (210) and the adhesive layer (208). One or more additional components arranged between the LEDs (214) and the outer member (202) may also be present.

[0157] In the example of FIG. 9, LEDs (214) are arranged around an input interface (112) configured to detect interactions from a user. For example, the user may press or otherwise operate an external member (202), and the external member is eventually detected by the input interface (112). The input interface (112) may be a button or switch that is actuated when force is applied to the external member (202) by the user. In another example, the input interface (112) and the external member (202) may be components of a capacitive sensor that detects when the user touches the external member (202).

[0158] FIG. 10 depicts a front view of an external member (202). As mentioned, the external member (202) defines a plurality of apertures (204). In this example, the apertures (204) each form slots having a length and a width.

[0159] Preferably, the apertures (204) are arranged toward the periphery / periphery / outer circumference of the outer member (202). As illustrated in FIG. 10, the apertures (204) are arranged closer to the periphery of the outer member (202) than to the center of the outer member (202). This allows the apertures (204) to be exposed (and thus light to be seen) even when the user is pressing the outer member (202). The user may be more likely to press / hold the center of the outer member (202) than the edge of the outer member (202).

[0160] FIG. 11 is an exploded view illustrating some of the components of the device (100). As mentioned, the device (100) may include an adhesive layer (208) arranged between the LEDs (214) and the outer member (202). In the illustrated example, the adhesive layer is of the same shape and size as the outer member (202) so that the adhesive covers the apertures (204). Subsequently, light may pass through the adhesive layer (208) before passing through the apertures (204). Thus, the adhesive layer (208) may be transparent or translucent. A translucent adhesive layer (208) may help diffuse light from the LEDs so that "hot spots" are avoided. A hot spot is an area where light has a higher intensity than surrounding areas.

[0161] In some examples, an outer member (202) is attached to a light-forming member (210) via an adhesive layer (208). In the illustrated example, the light-forming member (210) comprises one or more opaque zones (230) (which can be combined together) and one or more translucent or transparent zones (232) (which can also be combined together). The translucent or transparent zones (232) may be known as light pipes because they guide light through the light-forming member (210). Light from the LEDs (214) can pass through the translucent or transparent zones (232) but is blocked by the opaque zones (230). Thus, the opaque zones (230) reduce the intensity of light passing through a subset of apertures (204) (i.e., those arranged over the opaque zones (230)). The opaque sections (230) and the translucent or transparent sections (232) may be sections of a single monolithic component, but one or both sections may be treated to impart their specific optical properties to the sections. In another example, the opaque sections (230) and the translucent or transparent sections (232) are separate components that are overmolded.

[0162] In this example, the light-forming member includes an opaque area (238) extending around the periphery / circumference / circumference of the light-forming member (210). This can prevent light from leaking out around the outer side of the outer member (202). The opaque area may be, for example, an outer ring.

[0163] In this example, the device (100) includes four LEDs (214), and each of the LEDs (214) is positioned between adjacent opaque zones (230) so that light from the LEDs is separated into four quadrants. In other words, the LEDs (214) can be arranged under transparent or translucent zones. By separating the light into different zones, different indications can be provided to the user. For example, the number of illuminated quadrants can specify specific situations to the user. Accordingly, light can be blocked by opaque zones so that the light does not pass through some of the apertures.

[0164] In some examples, the zones between the opaque zones (230) are openings and accordingly do not contain translucent or transparent material.

[0165] A sealing member (212), such as a gasket, is arranged between the light-forming member (210) and the LEDs (214). The sealing member (212) has an outer diameter larger than the outer diameters of the outer member (202) and the light-forming member (210). In some examples, the sealing member (210) contacts the inner surface of the housing (102) to prevent liquid and dust from entering the device (100).

[0166] Indicating that the device is ready for use

[0167] FIG. 12 depicts a schematic representation of a system comprising a controller (302) (e.g., one or more processors), a heater assembly (304), a display assembly (306), and an input interface (112). The controller (302) is communicatively coupled to the heater assembly (304), the display assembly (306), and the input interface (112) through one or more wired or wireless connections (shown by dashed lines).

[0168] The controller (302) may be located, for example, on the PCB (122). The controller (302) may control the operations of the device (100), for example, causing the heater assembly (304) to heat the aerosol generating material. In some examples, the controller (302) receives signals from the input interface (112) and, in response, controls the heater assembly (304) and the indicator assembly (306). A user may provide input to the input interface (112) to operate the device. In certain examples, the heating mode is selected via the input interface (112).

[0169] As mentioned above, the indicator assembly (306) may indicate to the user the occurrence of one or more situations. To enable the indicator assembly (306) to provide an indication, the controller (302) may transmit a signal or command to the indicator assembly (306). In the examples of FIGS. 6 through 11, the indicator assembly (306) includes a visual component comprising a plurality of LEDs (214). It will also be understood that the following discussion may apply to other types of indicator assemblies (306).

[0170] In the following examples, the heater assembly (304) includes one or more inductor coils that generate one or more magnetic fields to heat the susceptor. The controller (302) can cause the inductor coil(s) of the device (100) to generate a variable magnetic field. For example, the controller (302) can transmit one or more signals to the inductor coil(s). Once the inductor coil(s) begin to generate a variable magnetic field, the susceptor (132) is heated, which eventually heats any aerosol-generating material located near the susceptor (132). It will be understood that the following description may also apply to other types of heater assemblies (304).

[0171] The controller (302) can cause one or more inductor coils to heat the susceptor to about 240°C to about 290°C. In a specific example, the device is configured to operate in one of a first mode and a second mode, and the first and second modes are heating modes. In one example, when the device is operating in the first (default) mode, the controller (302) can cause the first inductor coil (124) to heat a first region of the susceptor (132) to about 240°C to about 260°C, e.g., about 250°C. In another example, the device may be operating in the second (boost) mode, and the controller (302) can cause the first inductor coil (124) to heat a first region of the susceptor (132) to about 270°C to about 290°C, e.g., about 280°C.

[0172] The second inductor coil (126) may later generate a second magnetic field during the heating session. For example, the second inductor coil (126) may generate a second magnetic field between about 60 seconds and about 130 seconds after the first inductor coil (124) generates the first magnetic field. The second inductor coil is arranged to heat a second zone of the susceptor (132). In some examples, both inductor coils (124, 126) operate simultaneously.

[0173] After the first inductor coil (124) begins to heat the susceptor (132), the first zone of the susceptor (132) can reach the desired temperature within 2 seconds. However, it may take longer for the heat to penetrate into the aerosol generating material. For example, it may take up to 60 seconds for the aerosol generating material to reach the temperature of the susceptor (132). Due to the efficient nature of induction heating, the aerosol generated within the first 10 to 30 seconds may still be suitable for inhalation, even though the aerosol generating material has not been fully heated.

[0174] Accordingly, the controller (302) may be configured so that the indicator assembly (306) of the device indicates that the device is ready for use within a predetermined time period after the first inductor coil has generated a variable magnetic field. For example, the predetermined time period may be less than about 30 seconds, less than about 20 seconds, less than about 15 seconds, or less than about 10 seconds after the inductor coil has generated a variable magnetic field. The controller (302) may start a timer at the moment (or immediately thereafter) when the inductor coil has generated a variable magnetic field.

[0175] In a specific example, the predetermined time period depends on the mode in which the device is operating. For instance, when the device is operating in a second boost mode, the predetermined time period is shorter than the predetermined time period when the device is operating in a first default mode. This may be because the aerosol generating material is heated to a higher temperature within a shorter time period in the second boost mode, which may mean that the device is ready for use earlier.

[0176] In one example, the LEDs (214) emit light to indicate when the device (100) is ready to be used. For example, one or all of the LEDs (214) may be illuminated when the device (100) is ready to be used (i.e., after a predetermined period of time has elapsed).

[0177] In a specific example, the number of illuminated LEDs (214) indicates when the device is ready to be used. For example, when all LEDs (214) are illuminated, the device may be ready to be used.

[0178] FIG. 13a depicts an external member (202) positioned over four LEDs (214). Since none of the LEDs (214) are illuminated, light does not pass through the apertures (204). At this moment in time, the user may not yet have pressed the input interface (112), so the controller (302) has not yet received input from the input interface (112), or the controller (302) has not caused the inductor coil (124) to generate a variable magnetic field. When input is detected, the controller (302) causes the inductor coil (124) to generate a variable magnetic field. FIG. 13a also depicts the external member (202) at a moment in time after the user has pressed the input interface (112), but before any of the LEDs (214) are switched on.

[0179] FIG. 13b depicts an external member (202) during a first critical time period after the controller (302) causes the inductor coil (124) to generate a variable magnetic field. The first critical period may be, for example, 5 seconds. At this time, one of the LEDs is illuminated, and light passes through a subset of apertures (204) to illuminate one quadrant of the external member (202).

[0180] FIG. 13c depicts the external member (202) during a second critical time period after the controller (302) causes the inductor coil (124) to generate a variable magnetic field. The second critical period may be, for example, 10 seconds. At this time, two of the LEDs are illuminated, and light passes through a subset of apertures (204) to illuminate two quadrants of the external member (202).

[0181] FIG. 13d depicts the external member (202) during a third critical time period after the controller (302) causes the inductor coil (124) to generate a variable magnetic field. The third critical period may be, for example, 15 seconds. At this time, three LEDs are illuminated, and light passes through a subset of apertures (204) to illuminate three quadrants of the external member (202).

[0182] FIG. 13e depicts the external member (202) during a fourth critical time period after the controller (302) causes the inductor coil (124) to generate a variable magnetic field. The fourth critical period may be, for example, 20 seconds. At this time, all four LEDs are illuminated, and light passes through most of the apertures (204) to illuminate the four quadrants of the external member (202). Accordingly, when all four LEDs are illuminated, the indicator assembly (306) indicates that the device is ready for use. This occurs within 20 seconds of the inductor coil (124) generating a magnetic field.

[0183] In another example, the first threshold time period may be about 3 to 5 seconds, the second threshold time period may be about 6 to 10 seconds, the third threshold time period may be about 9 to 15 seconds, and the fourth threshold time period may be about 12 to 20 seconds. The first, second, third, and fourth threshold time periods may depend on the mode in which the device is operating. For example, when the device is operating in the first default mode, the first, second, third, and fourth threshold periods may be longer than the individual first, second, third, and fourth threshold periods when the device is operating in the second boost mode. This may be because the aerosol generating material is heated faster in the second boost mode.

[0184] In a particular example, the indicator assembly (306) may further include a haptic component, the haptic component configured to provide haptic feedback to indicate that the device has started heating the aerosol generating material. This may be useful when the first LED is not illuminated when the inductor coil begins to generate a magnetic field, but instead is illuminated after a first threshold period. The haptic feedback may indicate the mode in which the device is operating.

[0185] In some examples, the first LED may be illuminated substantially simultaneously with the controller (302) causing the inductor coil (124) to generate a magnetic field (i.e., instead of after the first threshold time period has elapsed). Accordingly, the visual component of the indicator assembly (306) may also indicate that the device has started heating the aerosol generating material. The haptic component may also provide a substantially simultaneous indication when the inductor coil begins to generate a magnetic field.

[0186] In another example, the indicator assembly (306) may include a haptic component, and the haptic component is configured to provide haptic feedback to indicate that the device is ready for use. This may occur instead of or in addition to any other types of indicators. For example, the indicator assembly (306) may provide both a visual indicator and haptic feedback to indicate that the device is ready for use.

[0187] In another example, the indicator assembly (306) may include an audible indicator, which is configured to emit sound to indicate that the device is ready for use. This may occur instead of or in addition to any other types of indicators. For example, the indicator assembly (306) may emit sound as well as provide a visual indicator to show that the device is ready for use.

[0188] Input interface

[0189] As mentioned above, the controller (302) detects an input from the input interface (112) and, in response, causes the inductor coil (124) to generate a variable magnetic field. In this example, the input interface (112) includes a single button, and the input interface (112) transmits a signal to the controller to indicate that the user has operated the input interface. In a specific example, the signal indicates that the user has released the button. Thus, the user can press and hold the button, and the controller (302) causes the inductor coil (124) to generate a variable magnetic field when the button is released.

[0190] In a specific example, the user may press and hold the button for different durations, and the device operates in a specific mode depending on the duration. Accordingly, the input received from the input interface (112) may also include a signal indicating the duration of the time the button is pressed—which can be time-measured by the controller (302)—by transmitting two signals (one for pressing and one for releasing), for example, as an indication of the time itself. The controller (302) may be configured to cause the inductor coil (124) to generate a variable magnetic field in response to receiving a signal indicating that the button is released and in response to determining that the duration of the time the button is pressed is greater than or equal to a threshold time period. If the duration is shorter than the threshold time period, the device (100) does not start heating. In a specific example, if the duration is shorter than the threshold time period, the device (100) may display the power level of the device's power source (118).

[0191] As mentioned, the device (100) may be configured to operate in a first mode or a second mode. Thus, in a particular example, if the duration of time the button is pressed is greater than or equal to a first threshold time period and less than a second threshold time period, the controller (302) is configured to operate the device in the first mode. If the duration of time the button is pressed is greater than or equal to a second threshold time period, the device is configured to operate in the second mode. For example, the first threshold time period may be 3 seconds, and the second threshold time period may be 5 seconds. Thus, using a single button, the user can select different modes. If the user presses the button for a duration longer than 3 seconds but less than 5 seconds, the device operates in the first mode.

[0192] In a specific example, if the duration for which the button is pressed is greater than or equal to the third threshold time period, the device is configured to operate in configuration mode. Configuration mode may allow the user to configure the settings of the device. The third threshold time period may be greater than the second threshold time period. In a specific example, the third threshold time period is 8 seconds. If the user holds the button for longer than 5 seconds but less than 8 seconds, the device operates in second mode.

[0193] In another example, if the duration for which the button is pressed is greater than or equal to the fourth threshold time period but less than the first time period, the device is configured to display the power level of the power source (118). The fourth threshold time period may be, for example, 1 second. If the user holds the button for longer than 1 second and less than 3 seconds, the device may display the power level. The power level may be displayed by the indicator assembly (306). For example, if the power level is 0% to 25%, one of the four LEDs (214) may be illuminated. If the power level is 25% to 50%, two of the LEDs (214) may be illuminated. If the power level is 50% to 75%, three of the LEDs (214) may be illuminated. If the power level is 75% to 100%, four of the LEDs (214) may be illuminated.

[0194] The above describes only one specific type of input interface (112). In other examples, the user selects an operation mode using a touch screen. In other examples, there may be one or more input interfaces. For example, to operate the device in a first mode, the user may operate a first input interface, and to operate the device in a second mode, the user may operate a second input interface. Accordingly, the controller (302) may be configured to cause the inductor coil to generate a variable magnetic field in response to an input received from one of the first and second input interfaces.

[0195] Indicating that the device has completed an operation

[0196] As described above, the indicator assembly (306) may indicate that the device is ready for use or that the device has started heating the aerosol generating material. Alternatively or additionally, the indicator assembly (306) may indicate that the device has completed an operation or will complete an operation. In certain examples, the indicator assembly (306) is configured to indicate the time remaining until the device completes an operation.

[0197] The device may be configured to heat an aerosol-generating material for a predetermined time period. Accordingly, the controller (302) may cause the indicator assembly (306) to indicate that the device has completed or will complete an operation within a predetermined time period after the inductor coil has generated a variable magnetic field. The predetermined time period may be, for example, about 3 minutes, 3 minutes 30 seconds, or 4 minutes. In some examples, the predetermined time depends on the mode in which the device is operating.

[0198] In another example, the device may be configured to heat an aerosol-generating material for a predetermined number of "puffs." For example, the device may include a puff sensor to determine when a user inhales or puffs on the device. Thus, the controller (302) may cause the indicator assembly (306) to indicate that the device has completed or will complete an operation when a predetermined number of puffs is detected by the puff sensor.

[0199] In another example, the device may be configured to heat an aerosol generating material until a predetermined volume of air is drawn through the device. For example, the device may include a flow sensor to determine the volume of air flowing through the device over a heating session. Thus, the controller (302) may cause the indicator assembly (306) to indicate that the device has completed or will complete an operation when a predetermined volume of air flows through the device.

[0200] In another example, the device may be configured to heat an aerosol generating material until a predetermined amount of energy is used by the device. For example, the device may include an energy sensing module for determining the amount of energy used by the device during a heating session. Thus, the controller (302) may cause the indicator assembly (306) to indicate that the device has completed or will complete an operation when a predetermined amount of energy is used by the device.

[0201] In another example, the device may be configured to heat the aerosol generating material and may stop heating when the battery level drops below a threshold. For example, the device may include an energy sensing module to determine the amount of energy remaining in the battery. Thus, the controller (302) may cause the indicator assembly (306) to indicate that the device has completed or will complete an operation when the remaining energy drops below the threshold.

[0202] In one example, the indicator assembly (306) indicates that the device has completed or will complete an operation by interrupting to provide any indications. For example, while the device is operating, visual components, such as one or more LEDs, may visually indicate that the device is operating. When the visual indication is interrupted, the user may receive a notification that the device has completed an operation. For example, while the device is operating, if one or more LEDs are illuminated, when the device has completed an operation, the LEDs may be switched off, thereby providing an indication to the user.

[0203] In another example, the indicator assembly (306) indicates that the device has completed an operation by providing a specific indication. For example, a visual component may provide a specific indication to show that the device has completed or will complete an operation. The visual indication may differ from the previous visual indication. For example, if one or more LEDs are illuminated while the device is operating, the LEDs may flash in a specific pattern to indicate that the device has completed or will complete an operation.

[0204] In a specific example, the indicator assembly (306) may include a haptic component, which is configured to provide haptic feedback to indicate that the device has completed or will complete an action. In another example, the indicator assembly (306) may include an audible indicator, which is configured to emit a sound to indicate that the device has completed or will complete an action. Two or more different types of indicators may be provided.

[0205] In some examples, the indicator assembly (306) is configured to display the time remaining until the device completes its operation. For example, as the device reaches its end time, the display may be provided at various points in time.

[0206] In one example, the haptic component may provide haptic feedback at 20 seconds from the end of the heating session, and may also provide haptic feedback at 15 seconds from the end of the heating session, at 10 seconds from the end of the heating session, at 5 seconds from the end of the heating session, and at the end of the heating session. The haptic feedback provided at each moment may be the same or different. For example, the feedback may become stronger or may last longer toward the end of the heating session.

[0207] In another example, the indicator assembly (306) includes a plurality of LEDs, and the number of illuminated LEDs indicates the time remaining until the device completes its operation. For example, when the device is operating, a first number of LEDs may be illuminated, and when the device completes its operation, a second number of LEDs may be illuminated, and the second number is smaller than the first number. The second number may be, for example, zero. The first number may be all of the LEDs. Thus, the LEDs may be "counted down" as the device approaches completion.

[0208] In a specific example, there are multiple LEDs, such as four LEDs, and the LEDs are switched off sequentially as the end of the heating session approaches. FIG. 13e may depict an external member (202) when the device is operating. The first and / or second inductor coils may or may not be activated at this time. At this time, all four LEDs are lit to indicate that the user can still use the device. There may be a threshold time period remaining until the device completes the operation. For example, 20 seconds may remain until the device completes the operation.

[0209] In one example, the device is referred to as having "completed operation" when the first and / or second inductor coils cease generating a variable magnetic field. In another example, the device is referred to as having "completed operation" when the aerosol temperature / volume is deemed to drop below an acceptable level, which may be after the point where the first and / or second inductor coils cease generating a variable magnetic field.

[0210] FIG. 13d may depict the external member (202) at a later time than shown in FIG. 13e. For example, only 15 seconds may remain until the device completes its operation. At this time, one of the four LEDs is switched off, and light passes through a subset of apertures (204) to illuminate three quadrants of the external member (202).

[0211] FIG. 13c may depict the external member (202) at a later time than shown in FIG. 13d. For example, only 10 seconds may remain until the device completes its operation. At this time, two of the four LEDs are switched off, and light passes through a subset of apertures (204) to illuminate two quadrants of the external member (202).

[0212] FIG. 13b may depict the external member (202) at a later time than shown in FIG. 13c. For example, only 5 seconds may remain until the device completes its operation. At this time, 3 of the 4 LEDs are switched off, and light passes through a subset of apertures (204) to illuminate one quadrant of the external member (202).

[0213] FIG. 13a may depict the external member (202) at a later time than shown in FIG. 13b. For example, the device may have completed the operation. At this time, all four LEDs are switched off, and no light is visible. Accordingly, the indicator assembly (306) indicates that the device has completed the operation and also indicates the time remaining until the device completes the operation.

[0214] FIG. 14 is a flowchart of a method for operating an aerosol providing device. The method comprises, in block (402), a step of causing an inductor coil of the aerosol providing device to generate a variable magnetic field for heating a susceptor. The invention comprises, in block (404), a step of, after causing the inductor coil to generate a variable magnetic field, causing an indicator assembly of the aerosol providing device to indicate that the device is ready for use within a predetermined time period, wherein the predetermined time period is about 20 seconds or less. In one example, the indicator assembly indicates that the device is ready for use within a predetermined time period after causing the inductor coil to generate a variable magnetic field.

[0215] FIG. 15 is a flowchart of another method for operating an aerosol providing device. The method comprises, in block (502), the step of causing the inductor coil of the aerosol providing device to generate a variable magnetic field for heating a susceptor. The method comprises, in block (504), the step of, after the step of causing the inductor coil assembly to start heating the aerosol generating material, the step of causing the indicator assembly of the aerosol providing device to indicate that the device has completed or will complete the operation within a predetermined time period.

[0216] The above embodiments should be understood as exemplary examples of the present invention. Further embodiments of the present invention are anticipated. It should be understood that any feature described in connection with any one embodiment may be used alone or in combination with other described features, and may also be used in combination with one or more features of any other embodiments or any combination of any other embodiments. Furthermore, equivalents and modifications not described above may be used without departing from the scope of the present invention as defined in the appended claims.

Claims

Claim 1 An aerosol providing device comprising: a coil; a heater component arranged to heat an aerosol generating material — said heater component is heatable by said coil —; an indicator assembly; and a controller, wherein the controller causes said coil to heat said heater component; An aerosol providing device, wherein, after the coil heats the heater component, the indicator assembly is configured to indicate that the device is ready for use within a predetermined time period, the predetermined time period is less than 60 seconds, the device may be configured to operate in one of a first mode and a second mode, and when the device is operated in the second mode, the coil is configured to heat the aerosol generating material to a higher temperature than when the device is operated in the first mode, and the predetermined time period is a first predetermined time when the device is operated in the first mode, and a second predetermined time when the device is operated in the second mode, and the second predetermined time is different from the first predetermined time. Claim 2 An aerosol providing device according to claim 1, wherein the predetermined time period is less than 15 seconds after the coil heats the heater component. Claim 3 An aerosol providing device according to claim 1, wherein the second predetermined time is less than the first predetermined time. Claim 4 An aerosol providing device according to claim 1, wherein the device further comprises an input interface, and the controller is configured to cause the coil to heat the heater component in response to an input received from the input interface. Claim 5 In claim 4, the input interface includes a button, and the input includes a signal indicating that the button is released, an aerosol providing device. Claim 6 An aerosol providing device according to claim 5, wherein the input further comprises a signal indicating the length of time the button is pressed, and the controller is configured to receive a signal indicating that the button is released; and to cause the coil to heat the heater component in response to the step of determining that the length of time the button is pressed is equal to or greater than a predetermined threshold time period. Claim 7 An aerosol providing device according to claim 1, wherein the device further comprises a puff detector for detecting when a user puffs the device, and the controller is configured to cause the coil to heat the heater component in response to the puff detector detecting when the user puffs the device. Claim 8 The aerosol providing device according to claim 1, wherein the indicator assembly comprises a visual component configured to provide a visual indication that the device is ready for use. Claim 9 The aerosol providing device according to claim 1, wherein the indicator assembly comprises a haptic component configured to provide haptic feedback to indicate that the device is ready for use. Claim 10 The aerosol providing device according to claim 1, wherein the indicator assembly comprises an audible indicator configured to emit sound to indicate that the device is ready for use. Claim 11 In claim 1, the indicator assembly is configured to display the remaining time until the device completes operation, an aerosol providing device. Claim 12 An aerosol providing device according to claim 1, wherein the controller is configured such that, after the coil heats the heater component, the indicator assembly indicates that the device has completed or will complete an operation within a third predetermined time period. Claim 13 An aerosol providing device according to claim 1, wherein the coil is a first coil, and the device further comprises a second coil for heating the heater component, and the first coil is adjacent to the second coil in a direction along the longitudinal axis of the device, and the controller is configured to cause the second coil to heat the heater component after the indicator assembly indicates that the device is ready for use; and when in use, the aerosol is drawn toward the proximal end of the device along the flow path of the device, and the first coil is arranged closer to the proximal end of the device than the second coil. Claim 14 A method for operating an aerosol providing device, wherein the device is configured to operate in one of a first mode and a second mode, the method comprises: a step of causing a coil of the aerosol providing device to heat a heater component; a step of causing an indicator assembly to indicate that the device is ready for use within a predetermined time period after the coil has heated the heater component — said predetermined time period is less than 60 seconds —; and a step of operating the device in the second mode by causing the coil to heat an aerosol generating material to a higher temperature than when the device is operated in the first mode, wherein the predetermined time period is a first predetermined time when the device is operated in the first mode and a second predetermined time when the device is operated in the second mode, and said second predetermined time is different from the first predetermined time. Claim 15 A method of operating an aerosol providing device, wherein the predetermined time period is less than 15 seconds after the coil heats the heater component. Claim 16 A method of operating an aerosol providing device, wherein the second predetermined time is less than the first predetermined time. Claim 17 A method for operating an aerosol providing device according to claim 14, further comprising the step of causing the coil to heat the heater component in response to receiving input from the input interface of the device. Claim 18 A method for operating an aerosol providing device according to claim 17, wherein the input interface comprises a button, and the input comprises a signal indicating that the button is released and a length of time for which the button is pressed, and the method further comprises the steps of causing the coil to heat the heater component in response to receiving the signal and determining that the length of time for which the button is pressed is greater than or equal to a threshold time period. Claim 19 A method for operating an aerosol providing device according to claim 14, further comprising the step of causing the coil to heat the heater component in response to a puff detector that detects that the user puffs the device. Claim 20 A method for operating an aerosol providing device according to claim 14, further comprising the step of having the indicator assembly display the remaining time until the device completes operation. Claim 21 A method for operating an aerosol providing device according to claim 14, further comprising the step of, after the coil heats the heater component, causing the indicator assembly to indicate that the device has completed or will complete operation within a third predetermined time period. Claim 22 In claim 14, the coil is a first coil, and the device further comprises a second coil for heating the heater component, and the first coil is adjacent to the second coil in a direction along the longitudinal axis of the device, and in use, the aerosol is drawn toward the proximal end of the device along the flow path of the device, and the first coil is arranged closer to the proximal end of the device than the second coil, and the method further comprises the step of causing the second coil to heat the heater component after the indicator assembly indicates that the device is ready for use. Claim 23 delete Claim 24 delete Claim 25 delete Claim 26 delete

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