Aerosol generating device equipped with a positioning mechanism

Abstract

The aerosol-generating device (10, 100, 110) comprises a heating assembly (12). The heating assembly (12) comprises a heating chamber (14) positioned to receive an aerosol-generating substrate (16). The aerosol-generating device further comprises a positioning mechanism (18). The positioning mechanism (18) is configured to move the aerosol-generating substrate (16) along a longitudinal axis of the heating chamber (14) based on a temperature of the heating chamber (14).

Description

[Technical field]

[0001] The present disclosure relates generally to aerosol generating devices, and more particularly to aerosol generating devices for heating an aerosol-generating substrate to generate an aerosol for inhalation by a user. [Background technology]

[0002] In recent years, the popularity and use of risk reduction or risk modification devices (also known as vaporizers) has grown rapidly as an alternative to the use of traditional tobacco products. A variety of devices and systems are available that heat or warm an aerosol-generating substrate, rather than burning it, to generate an aerosol for inhalation by the user.

[0003] Commonly available risk reduction or modification devices are aerosol generating devices, i.e. so-called heat-not-burn devices. This type of device generates an aerosol or vapour by heating an aerosol-generating substrate contained in an aerosol-generating article, such as a heated tobacco stick, in a heating chamber, typically to a temperature in the range of 150°C to 300°C. Heating the aerosol-generating substrate to a temperature within this range, without burning or combusting the aerosol-generating substrate, generates vapour which typically cools and condenses to form an aerosol for inhalation by a user of the device.

[0004] Currently available aerosol generating devices rely on the user to correctly position the aerosol-generating substrate within the heating chamber of the device. Incorrect positioning of the aerosol-generating substrate within the heating chamber can cause damage to the substrate and / or the device. Furthermore, the user is typically required to determine when to begin using the aerosol generating device. Beginning use before the heating chamber has reached a target temperature at which the aerosol generating device is ready for use can compromise the sensory experience by reducing the quality and / or concentration of the generated vapour (and resulting aerosol).

[0005] There is therefore a need to provide an aerosol generating device that mitigates these disadvantages. Summary of the Invention [Means for solving the problem]

[0006] According to a first aspect of the present disclosure, there is provided an aerosol generating device, comprising: a heating assembly comprising a heating chamber positioned to receive the aerosol-generating substrate; a positioning mechanism configured to control the positioning of the aerosol-generating substrate within the heating chamber based on a temperature of the heating chamber; An aerosol generating device is provided, comprising:

[0007] The positioning mechanism is configured to move the aerosol-generating substrate within the heating chamber along the longitudinal direction of the heating chamber based on the temperature of the heating chamber. The positioning mechanism thus ensures correct positioning of the aerosol-generating substrate within the heating chamber. The risk of a user damaging the aerosol-generating substrate and / or the aerosol-generating device by incorrectly positioning the aerosol-generating substrate within the heating chamber is therefore reduced. Furthermore, since the positioning mechanism controls the movement, and thus the positioning, of the aerosol-generating substrate within the heating chamber based solely on temperature, no additional power source or additional control system is required to operate the positioning mechanism. The arrangement is therefore simple and robust.

[0008] Optionally, the positioning mechanism comprises: a movable member disposed within the heating chamber, the movable member comprising a locator on which a user can place the aerosol-generating substrate; an actuator configured to displace a moveable member within the heating chamber to thereby control positioning of the aerosol-generating substrate (i.e. move the aerosol-generating substrate) within the heating chamber along a longitudinal direction from a start position to an end position based on the heating chamber reaching a target temperature; Equipped with.

[0009] As the movable member is displaced from the start position to the end position, the aerosol-generating substrate will also move within the heating chamber. When the movable member is in the end position, the aerosol-generating substrate will stop moving. This provides the user with a clear visual indication of when the heating chamber has reached the target temperature (i.e., when the aerosol-generating substrate has stopped moving) and therefore when the aerosol generating device is ready for use. Thus, it is easy to avoid starting use before the heating chamber is at the target temperature, ensuring that the quality and concentration of the generated vapor (and resulting aerosol) are optimal for a satisfying sensory experience.

[0010] The end position may correspond to the maximum allowable displacement of the moveable member within the heating chamber by the actuator, thus making the arrangement simple and robust.

[0011] Optionally, the actuator comprises a phase change material having a volume that is temperature dependent, and in use, an increase in volume of the phase change material due to thermal expansion caused by heat from the heating chamber extends the actuator to displace the moveable member to an end position. The phase change material may comprise wax.

[0012] Therefore, the actuator operates solely based on the reaction of the phase change material, e.g., wax, to the temperature of the heating chamber. Therefore, no additional power source or additional control system is required to operate the actuator. Therefore, the arrangement is simple and robust.

[0013] The movable member may comprise an arm, a portion of which extends into the heating chamber from a position to one side of the heating chamber, Alternatively, the movable member may comprise an arm, a portion of which extends into the heating chamber from a position below the heating chamber.

[0014] In some cases, the positioning mechanism comprises a resilient member configured to bias the movable member to a start position within the heating chamber, the resilient member configured to strain as the movable member is displaced by the actuator to the end position. The resilient member may comprise a mechanical spring. The mechanical spring may comprise a compression spring configured to shorten as the movable member is displaced by the actuator to the end position. Alternatively, the mechanical spring may comprise a tension spring configured to extend as the movable member is displaced by the actuator to the end position.

[0015] Thus, a resilient member, such as a mechanical spring, provides an automatic return mechanism for the actuator, which is simple and robust.

[0016] The locator may comprise a cup having a side wall and a base, where the aerosol-generating substrate may be placed within the cup, this arrangement providing a secure friction fit.

[0017] The cup may include at least one opening in the base, through which air can flow, in use, from the exterior of the cup to the interior of the cup. This arrangement improves airflow by allowing air to flow through the at least one opening in the base to the bottom of the aerosol-generating substrate.

[0018] The cup may include at least one opening in the side wall, through which air can flow, in use, from the outside of the cup to the inside of the cup. This arrangement improves airflow by allowing air to flow to the side of the aerosol-generating substrate through the at least one opening in the side wall.

[0019] The base of the cup may include a raised central portion, which arrangement further improves airflow by allowing air to flow through at least one opening in the sidewall to the sides and bottom of the aerosol-generating substrate. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic cross-sectional view of a first example of an aerosol generating device. [Figure 2a] FIG. 2 is a schematic cross-sectional view of a second example of an aerosol generating device in a first state. [Figure 2b] FIG. 2b is a schematic cross-sectional view of the aerosol generating device of FIG. 2a in a second state. [Figure 3a] FIG. 2b is a schematic cross-sectional view of the heating assembly of the aerosol generating device of FIG. 2a. [Figure 3b] FIG. 3b is a schematic cross-sectional view of the heating assembly of FIG. 3a, with the aerosol-generating substrate received in the heating chamber of the heating assembly. [Figure 4a] FIG. 3c is a schematic cross-sectional view of the arrangement of FIG. 3b in a first state; [Figure 4b] FIG. 3c is a schematic cross-sectional view of the arrangement of FIG. 3b in a second state; [Figure 4c] FIG. 3c is a schematic cross-sectional view of the arrangement of FIG. 3b in an intermediate state. [Figure 4d] FIG. 3c is a schematic cross-sectional view of the arrangement of FIG. 3b in another intermediate state. [Figure 5a] FIG. 1 is a schematic cross-sectional view of a third example of an aerosol generating device in a first state. [Figure 5b] FIG. 5b is a schematic cross-sectional view of the aerosol generating device of FIG. 5a in a second state. [Figure 6a] FIG. 5b is a schematic cross-sectional view of the heating assembly of the aerosol generating device of FIG. 5a. [Figure 6b] FIG. 6b is a schematic cross-sectional view of the heating assembly of FIG. 6a, with the aerosol-generating substrate received in the heating chamber of the heating assembly. [Figure 7a] FIG. 6c is a schematic cross-sectional view of the arrangement of FIG. 6b in a first state; [Figure 7b] FIG. 6c is a schematic cross-sectional view of the arrangement of FIG. 6b in a second state; [Figure 7c] FIG. 6c is a schematic cross-sectional view of the arrangement of FIG. 6b in an intermediate state. [Figure 7d] FIG. 6c is a schematic cross-sectional view of the arrangement of FIG. 6b in another intermediate state. [Figure 8a] 1 is a schematic cross-sectional view of another heating assembly in which an aerosol-generating substrate is received in a heating chamber of the heating assembly. [Figure 8b] FIG. 8b is a schematic top view of the heating assembly of FIG. 8a. [Figure 8c] FIG. 8b is a schematic cross-sectional view of a portion of the heating assembly of FIG. 8a. [Figure 9a] 1 is a schematic cross-sectional view of another heating assembly in which an aerosol-generating substrate is received in a heating chamber of the heating assembly. [Figure 9b] FIG. 9b is a schematic top view of the heating assembly of FIG. 9a. [Figure 9c] FIG. 9b is a schematic cross-sectional view of a portion of the heating assembly of FIG. 9a. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Embodiments of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0022] 1, there is shown diagrammatically a first example of an aerosol-generating device 10 according to the present disclosure. The aerosol-generating device 10 is configured for use with an aerosol-generating substrate 16, such that the aerosol-generating device 10 and the aerosol-generating substrate 16 together form an aerosol-generating system.

[0023] The aerosol-generating device 10 may equally be referred to as a "heated tobacco device," a "heated non-combustion tobacco device," a "device for vaporizing tobacco products," etc., and is to be construed as any device suitable for achieving these effects. The features disclosed herein are equally applicable to devices designed to vaporize any aerosol-generating substrate.

[0024] The aerosol generating device 10 is a handheld, portable device, meaning that a user can hold and support the device in one hand unassisted. The aerosol generating device 10 has a first (or proximal) end 48 and a second (or distal) end 50, and includes a device housing 52.

[0025] In some examples, the aerosol generation device 10 includes a controller 54. The aerosol generation device 10 may include a user interface for controlling the operation of the aerosol generation device 10 via the controller 54.

[0026] The controller 54 is configured to detect the initiation of use of the aerosol generation device 10 in response to a user input, such as pressing a button to activate the aerosol generation device 10, or in response to detected airflow through the aerosol generation device 10. As will be appreciated by those skilled in the art, airflow through the aerosol generation device 10 indicates an inhalation or "puff" by a user. The aerosol generation device 10 may include a puff detector, such as, for example, an airflow sensor (not shown), to detect airflow through the aerosol generation device 10.

[0027] The controller 54 may include electronic circuitry. The aerosol generating device 10 may include a power source 56, such as a battery. The power source 56 and electronic circuitry may be configured to operate at high frequencies. The power source 56 and electronic circuitry may be configured to operate at frequencies between about 80 kHz and 500 kHz, optionally between about 150 kHz and 250 kHz, optionally about 200 kHz. The power source 56 and electronic circuitry may also be configured to operate at higher frequencies, for example in the MHz range, if desired.

[0028] The aerosol generating device 10 includes a heating assembly 12. The heating assembly 12 further includes a heating chamber 14. The heating chamber 14 is positioned to receive an aerosol-generating substrate 16. In some examples, the heating chamber 14 has a generally cylindrical cross-section. The heating chamber 14 defines a cavity.

[0029] The heating chamber 14 has a first end 58 and a second end 60, and has a longitudinal direction extending between the first end 58 and the second end 60. The heating chamber 14 includes an opening 62 at the first end 58 for receiving the aerosol-generating substrate 16. In the illustrated example, the heating chamber 14 includes a generally cylindrical sidewall 64, i.e., a sidewall 64 having a generally circular cross-section.

[0030] The aerosol-generating substrate 16 can be any type of solid or semi-solid material. Exemplary types of aerosol-generating solids include powders, granules, pellets, flakes, strands, particles, gels, strips, loose-leaf, cut-leaf, cut-filler, porous materials, foamed materials, or sheets. The aerosol-generating substrate 16 can include plant-derived materials, and in particular tobacco. It can advantageously include reconstituted tobacco.

[0031] The aerosol-generating substrate 16 may include an aerosol-forming agent. Examples of aerosol-forming agents include polyhydric alcohols, such as glycerin or propylene glycol, and mixtures thereof. Typically, the aerosol-generating substrate 16 may include an aerosol-forming agent content of about 5% to about 50% on a dry weight basis. In some examples, the aerosol-generating substrate 16 may include an aerosol-forming agent content of about 10% to about 20% on a dry weight basis, and in some cases about 15% on a dry weight basis.

[0032] Upon heating, the aerosol-generating substrate 16 may release volatile compounds, which may include flavor compounds, such as nicotine or tobacco flavorings.

[0033] In the illustrated example, the aerosol-generating substrate 16 is included in an aerosol-generating article 66. The shape of the aerosol-generating article 66 corresponds to the shape of the heating chamber 14. The aerosol-generating article 66 may be substantially cylindrical or rod-shaped. The aerosol-generating article 66 may be substantially stick-shaped and may generally resemble a cigarette, with a tubular region in which the aerosol-generating substrates are arranged in a suitable manner. The aerosol-generating article 66 may be a disposable and replaceable article, which may, for example, contain tobacco as the aerosol-generating substrate 16. The aerosol-generating article 66 may be a heated tobacco stick. The aerosol-generating substrate 16 is a consumable item.

[0034] The aerosol-generating article 66 has a first end 68 (or mouth end), a second end 70, and includes a filter 72 at the first end 68. The filter 72 functions as a mouthpiece and may include, for example, a breathable plug comprising cellulose acetate fibers.

[0035] The aerosol-generating substrate 16 and filter 72 may be surrounded by a paper wrapper and thus embodied as an aerosol-generating article 66. Depending on the design, one or more vapor collection areas, cooling areas, and other structures may also be included.

[0036] The heating assembly 12 includes a heater (not shown) positioned to heat an aerosol-generating substrate 16 within a heating chamber 14 .

[0037] The heating assembly 12 may be an induction heating assembly (not shown) that further comprises an induction coil (not shown) that is arranged to be energized to generate an alternating electromagnetic field for inductively heating an inductively heatable susceptor (not shown), i.e., a heater.

[0038] The inductively heatable susceptor may be disposed around the periphery of the heating chamber 14. Alternatively, the inductively heatable susceptor may be disposed to protrude from the second end 60 into the heating chamber 14 (e.g., as a heating blade or pin) and penetrate the aerosol-generating substrate 16. In other examples, the inductively heatable susceptor is instead provided within the aerosol-generating substrate 16 during manufacture of the aerosol-generating article 66. In such examples, the aerosol-generating article 66 comprises an inductively heatable susceptor.

[0039] The induction coil may be energized by a power supply 56 and a controller 54. The induction coil may comprise Litz wire or Litz cable, although it will be appreciated that other materials may be used.

[0040] The induction coil can extend around the heating chamber 14. Thus, the induction coil can be annular. The induction coil can be generally helical in shape. In some examples, the circular cross-section of a helical induction coil can facilitate insertion of the aerosol-generating article 66 and, optionally, one or more inductively heatable susceptors into the heating chamber 14 and ensure uniform heating of the aerosol-generating substrate 16.

[0041] The inductively heatable susceptor comprises an electrically conductive material. The inductively heatable susceptor may comprise, but is not limited to, one or more of graphite, molybdenum, silicon carbide, niobium, aluminum, iron, nickel, nickel-containing compounds, titanium, mild steel, stainless steel, low carbon steel, and alloys thereof, such as nickel chromium or nickel copper, and composites of metallic materials. In some examples, the inductively heatable susceptor comprises a metal selected from the group consisting of mild steel, stainless steel, and low carbon stainless steel.

[0042] In use, application of an electromagnetic field in the vicinity of the inductively heatable susceptor causes the inductively heatable susceptor to generate heat due to eddy currents and magnetic hysteresis losses resulting in the conversion of energy from electromagnetic to thermal.

[0043] The induction coil may be arranged to operate, in use, with a varying electromagnetic field having a magnetic flux density of about 20 mT to about 2.0 T (at its highest density point).

[0044] In use, heat from a heater, e.g., an inductively heatable susceptor, is transferred, e.g., by conduction, radiation and convection, to the aerosol-generating substrate 16 positioned within the heating chamber 14, heating the aerosol-generating substrate (without burning the aerosol-generating substrate), thereby generating a vapor that cools and condenses to form an aerosol for inhalation by a user of the aerosol-generating device 10, e.g., through filter 72. Vaporization of the aerosol-generating substrate is aided by adding air from the surrounding environment, e.g., through an air inlet (not shown).

[0045] Generally speaking, a vapor is a substance that is in the gas phase below its critical temperature, meaning that it can be condensed into a liquid by increasing the pressure without decreasing the temperature, whereas an aerosol is fine solid particles or liquid droplets suspended in air or another gas. However, it should be noted that the terms "aerosol" and "vapor" may be used interchangeably herein, particularly with respect to the form of inhalable medium that is generated for a user to inhale.

[0046] The aerosol-generating device 10 further comprises a positioning mechanism 18. The positioning mechanism 18 is configured to move the aerosol-generating substrate 16 within the heating chamber 14 along a longitudinal direction of the heating chamber 14 based on the temperature of the heating chamber 14 to control the positioning of the aerosol-generating substrate 16 within the heating chamber 14.

[0047] Thus, the positioning mechanism 18 is configured to move the aerosol-generating substrate 16 longitudinally within the heating chamber 14 to position the aerosol-generating substrate 16 at a predetermined location within the heating chamber 14 based on the temperature of the heating chamber 14. The predetermined location defines a ready-to-use position of the aerosol-generating substrate 16 within the heating chamber 14.

[0048] The positioning mechanism 18 ensures correct positioning of the aerosol-generating substrate 16 within the heating chamber 14. Thus, the risk of a user damaging the aerosol-generating substrate 16 and / or the aerosol generating device 10 by incorrectly positioning the aerosol-generating substrate 16 within the heating chamber 14 is reduced. Furthermore, because the positioning mechanism 18 controls the movement, and thus the positioning, of the aerosol-generating substrate 16 within the heating chamber 14 based solely on temperature, no additional power source or additional control system is required to operate the positioning mechanism 18. Thus, the arrangement is simple and robust.

[0049] 2a-4d, there is shown a second example of an aerosol generation device 100 according to the present disclosure. The aerosol generation device 100 is similar to the aerosol generation device 10 described above, and corresponding elements are designated using the same reference numbers.

[0050] 2a and 2b are schematic cross-sectional views of an aerosol generating device 100 in a first state and a second state, respectively.

[0051] Figure 3a is a schematic cross-sectional view of the heating assembly 12 of the aerosol-generating device 100. In Figure 3b, an aerosol-generating substrate 16 has been received in the heating chamber 14 of the heating assembly 12. The aerosol-generating device 100 is in a first state in Figures 3a and 3b.

[0052] 4a to 4d are schematic cross-sectional views of the heating assembly 12 of the aerosol generating device 100 in different states, as will be described below.

[0053] The positioning mechanism 18 of the aerosol-generating device 100 includes a movable member 20 disposed within the heating chamber 14. The movable member 20 includes a locator 22 on which a user can place the aerosol-generating substrate 16. The movable member 20 may include a plate or platform.

[0054] The positioning mechanism 18 further comprises an actuator 24. The actuator 24 is a linear actuator. In the illustrated example, the actuator 24 is located on one side of the heating chamber 14. The actuator 24 is configured to displace the movable member 20 within the heating chamber 14, thereby controlling the movement, and thus the positioning, of the aerosol-generating substrate 16 within the heating chamber 14 from a start position (which is a first state illustrated in FIG. 2a) to an end position (which is a second state illustrated in FIG. 2b) based on the heating chamber 14 reaching a target temperature. The actuator 24 is therefore coupled or connected to the movable member 20 such that movement, i.e. actuation, of the actuator 24 causes a corresponding movement of the movable member 20.

[0055] The target temperature is a predetermined temperature of the heating chamber 14 at which the aerosol generating device 10 is ready for use. The target temperature can be in the range of 150° C. to 300° C. The target temperature should be reached during the heating phase.

[0056] As the movable member 20 is displaced from the start position to the end position, the aerosol-generating substrate 16 will also move within the heating chamber 14. When the movable member 20 is in the end position, the aerosol-generating substrate 16 will stop moving. This provides the user with a clear visual indication of when the heating chamber has reached the target temperature (i.e., the aerosol-generating substrate 16 will stop moving) and therefore when the aerosol-generating device is ready for use. Thus, it is easy to avoid starting use before the heating chamber 14 is at the target temperature, ensuring that the quality and concentration of the generated vapour (and resulting aerosol) are optimal for a satisfying sensory experience.

[0057] In the example shown, the end position corresponds to the maximum allowable displacement of the movable member 20 within the heating chamber 14 by the actuator 24. The arrangement is therefore simple and robust.

[0058] The actuator 24 comprises a phase change material 26 having a volume that is temperature dependent. In use, an increase in the volume of the phase change material 26 due to thermal expansion caused by heat from the heating chamber 14 extends the actuator 24 and displaces the movable member 20 to an end position. The actuator 24 is therefore configured to convert thermal energy into mechanical energy based on the phase change behaviour of the phase change material 26. The phase change material 26 may comprise a wax that melts or softens during use. The actuator 24 may therefore be a wax motor. Typically, wax expands by 5-20% when melted or softened.

[0059] The actuator 24 is sensitive to heat and therefore may be a thermal actuator.

[0060] Therefore, the actuator 24 operates solely based on the reaction of the phase change material, e.g., wax, to the temperature of the heating chamber 14. Therefore, no additional power source or additional control system is required to operate the actuator 24. The arrangement is therefore simple and robust.

[0061] In the illustrated example, the positioning mechanism 18 further comprises a resilient member 27. In the illustrated example, the resilient member 27 comprises a mechanical spring 28. The resilient member 27 is configured to bias the movable member 20 towards the start position within the heating chamber 14. The resilient member 27 is therefore configured to displace the movable member 20 towards the start position when force is no longer applied by the actuator 24. The resilient member 27 is configured to strain as the movable member 20 is displaced by the actuator 24 towards the end position.

[0062] In the illustrated example, the elastic member 27 is arranged to be in contact with the movable member 20. The elastic member 27 is capable of recovering its original shape when the force is no longer applied by the actuator 24.

[0063] Thus, the elastic member 27, for example a mechanical spring 28, provides an automatic return mechanism for the actuator 24, which is simple and robust.

[0064] The movable member 20 includes an arm 34. A portion 36 of the arm 34 extends into the heating chamber 14.

[0065] 2a-4d, portion 36 of arm 34 extends into heating chamber 14 from a position to one side of heating chamber 14. In such an example, mechanical spring 28 includes a compression spring 30. Compression spring 30 is configured to shorten as moveable member 20 is displaced by actuator 24 to an end position.

[0066] 5a-7d, there is shown a third example of an aerosol generation device 110 according to the present disclosure. The aerosol generation device 110 is similar to the aerosol generation devices 10, 100 described above and corresponding elements are designated using the same reference numerals.

[0067] Figures 5a and 5b are schematic cross-sectional views of an aerosol-generating device 110 in a first state (with the movable member 20 in a start position) and a second state (with the movable member 20 in an end position), respectively. In Figure 5a, the aerosol-generating substrate 16 is not present.

[0068] Figure 6a is a schematic cross-sectional view of the heating assembly 12 of the aerosol-generating device 100. In Figure 6b, an aerosol-generating substrate 16 has been received in the heating chamber 14 of the heating assembly 12. The aerosol-generating device 100 is in a first state in Figures 6a and 6b.

[0069] 7a to 7d are schematic cross-sectional views of the heating assembly 12 of the aerosol generating device 110 in different states.

[0070] 5a-7d, the portion 36 of the arm 34 of the movable member 20 extends from a position below, i.e. below, the heating chamber 14 into the heating chamber 14. In such an example, the mechanical spring 28 includes a tension spring 32. The tension spring 32 is configured to extend as the movable member 20 is displaced by the actuator 24 to the end position.

[0071] In all of the illustrated examples, the locator 22 comprises a cup 38 having a sidewall 40 and a base 42. In use, a user can place the aerosol-generating substrate 16 into the cup 38. This arrangement provides a secure friction fit.

[0072] The sidewall 40 and / or base 42 of the cup 38 may have an inner surface with relatively higher friction than the inner surface of the heating chamber 14 so that the aerosol-generating substrate 16 placed in the cup 38 by a user is securely held by the cup 38 and moves along the longitudinal direction of the heating chamber 14 as the movable member 20 is displaced within the heating chamber 14.

[0073] 8a, 8b and 8c, in the illustrated example, the cup 38 includes at least one opening 44 in the base 42. As shown, in use, air can flow through the at least one opening 44 from the outside of the cup 38 to the inside of the cup 38 (as indicated by the arrows). This arrangement improves airflow by allowing air to flow through the at least one opening 44 in the base 42 to the bottom of the aerosol-generating substrate 16.

[0074] 9a, 9b and 9c, in the illustrated example, the cup 38 includes at least one opening 44 in the sidewall 40. As shown, in use, air can flow through the at least one opening 44 from the outside of the cup 38 to the inside of the cup 38 (as indicated by the arrows). This arrangement improves airflow by allowing air to flow through the at least one opening 44 in the sidewall 40 to the side of the aerosol-generating substrate 16.

[0075] At least one opening 44 in the sidewall 40 and / or base 42 may be a perforation or may comprise a cutout portion.

[0076] 9c, in some examples, the base 42 of the cup 38 includes a raised central portion 46. This arrangement further improves airflow (as shown by the arrows), for example, by allowing air to flow through at least one opening 44 in the sidewall 40 to the sides and bottom of the aerosol-generating substrate 16.

[0077] To use the aerosol-generating device 10, a user inserts the aerosol-generating substrate 16 through the opening 62 into the heating chamber 14 such that an end of the aerosol-generating substrate 16 is positioned on the locator 22 of the movable member 20. Activation of the heater to heat the heating chamber 14 causes the actuator 24 to displace the movable member 20, together with the aerosol-generating substrate 16 positioned on the locator 22, from a start position (i.e., the first state as illustrated in FIGS. 2a, 3a, 3b, 4a, 5a, 6a, 6b and 7a) within the heating chamber 14 through an intermediate position (as illustrated in FIGS. 4c and 7c) based on the heating chamber 14 reaching a target temperature. In the illustrated example, the end position corresponds to the second end 60 of the heating chamber 14, i.e., the bottom of the heating chamber 14, which is the maximum allowable displacement of the movable member 20 within the heating chamber 14. In use, the aerosol-generating substrate 16 slowly moves downwards, i.e., lowers, into the heating chamber 14 before coming to rest at the end position, at which point the aerosol-generating device 10 is ready for use, i.e., the heating chamber 14 has reached the target temperature.

[0078] After the heater is deactivated, as the heating chamber 14 cools below the target temperature, the actuator 24 returns to its original position and no longer exerts force on the movable member 20. The resilient member 27 urges the movable member 20, together with the aerosol-generating substrate 16 placed on the locator 22, from an end position (as shown in Figures 2b, 4b, 5b and 7b) within the heating chamber 14, through an intermediate position (as shown in Figures 4d and 7d), to a start position (as shown in Figures 2a, 3a, 3b, 4a, 5a, 6a, 6b and 7a).

[0079] 4a, 4b, 4c and 4d in relation to the second example of the aerosol generating device 100, as described above, the portion 36 of the arm 34 of the movable member 20 extends into the heating chamber 14 from a position to one side of the heating chamber 14. In such an example, the elastic member 27 includes a compression spring 30. The compression spring 30 is distorted by shortening, i.e. contracting, as the movable member 20 is displaced by the actuator 24 from a start position illustrated in FIG. 4a, through an intermediate position (as illustrated in FIG. 4c) to an end position illustrated in FIG. 4b.

[0080] In the illustrated example, the actuator 24 is a wax motor as described above. In use, as illustrated in Figures 4b and 4c, heat from the heating chamber 14 causes the wax in the wax motor to expand. As the wax expands, the arm 34 of the movable member 20 is pushed (as best shown by the downward arrow in Figure 4c), thereby shortening the compression spring 30. The movable member 20, together with the aerosol-generating substrate 16 resting on the locator 22, moves downwards in the heating chamber 14 before stopping at the end position illustrated in Figure 4b, at which point the aerosol-generating device 10 is ready for use, i.e. the heating chamber 14 has reached the target temperature. Thus, the actuator 24, i.e. the wax motor, completes a full stroke when the heating chamber 14 has reached the target temperature.

[0081] After the heater is deactivated, the heating chamber 14 cools below the target temperature, causing the wax in the wax motor to cool and contract or shrink to its original volume, thereby returning to its original position and no longer exerting force on the movable member 20. The compression spring 30 then expands or lengthens, urging the movable member 20, together with the aerosol-generating substrate 16 placed on the locator 22, from the end position (as shown in FIG. 4b) in the heating chamber 14, through the intermediate position (as shown in FIG. 4d) to the start position (as shown in FIG. 4a). The compression spring 30 therefore pushes up the arm 34 of the movable member 20 (as best shown by the upward arrow in FIG. 4d), urging the movable member 20 from the end position to the start position. In the start position, the arm 34 is maximally received within the housing of the actuator 24, and the compression spring 30 is in a stationary state.

[0082] 7a, 7b, 7c and 7d in relation to a third example of an aerosol generating device 110, as described above, the portion 36 of the arm 34 of the movable member 20 extends into the heating chamber 14 from a position below the heating chamber 14. In such an example, the elastic member 27 includes a tension spring 32. The tension spring 32 is strained by stretching as the movable member 20 is displaced by the actuator 24 from a start position illustrated in FIG. 7a, through an intermediate position (as illustrated in FIG. 7c) to an end position illustrated in FIG. 7b.

[0083] In the illustrated example, the actuator 24 is a wax motor as described above. In use, as illustrated in Figures 7b and 7c, heat from the heating chamber 14 causes the wax in the wax motor to expand. As the wax expands, the arm 34 of the movable member 20 is pushed (as best shown by the downward arrow in Figure 7c), causing the tension spring 32 to stretch or lengthen. The movable member 20, together with the aerosol-generating substrate 16 resting on the locator 22, moves downwards in the heating chamber 14 before stopping at the end position illustrated in Figure 7b, at which point the aerosol-generating device 10 is ready for use, i.e. the heating chamber 14 has reached the target temperature. Thus, the actuator 24, i.e. the wax motor, completes a full stroke when the heating chamber 14 has reached the target temperature.

[0084] After the heater is deactivated, the heating chamber 14 cools below the target temperature, causing the wax in the wax motor to cool and contract to its original volume, i.e., shrink, and thus return to its original position and no longer exert a force on the movable member 20. The tension spring 32 then contracts, i.e., shortens, urging the movable member 20, together with the aerosol-generating substrate 16 placed on the locator 22, from the end position (as shown in FIG. 7b) in the heating chamber 14, through the intermediate position (as shown in FIG. 7d) to the start position (as shown in FIG. 7a). The tension spring 32 therefore pulls the arm 34 of the movable member 20 upward (as best shown by the upward arrow in FIG. 7d), urging the movable member 20 from the end position to the start position. In the start position, the arm 34 is maximally received within the housing of the actuator 24, and the tension spring 32 is in a stationary state.

[0085] The figures also illustrate methods of manufacturing aerosol generating devices 10, 100, 110 according to examples of the present disclosure. The figures also illustrate methods of providing aerosol generating systems according to examples of the present disclosure.

[0086] Although exemplary embodiments have been described in the preceding paragraphs, it should be understood that various modifications to those embodiments may be made without departing from the scope of the appended claims. Thus, the breadth and scope of the claims should not be limited to the above-described exemplary embodiments.

[0087] Any combination of the above-described features in all possible variations thereof is encompassed by the present disclosure unless otherwise indicated herein or clearly contradicted by context.

[0088] Unless the context clearly dictates otherwise, throughout this specification and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense, i.e., "including but not limited to", rather than in an exclusive or exhaustive sense.

Claims

1. a heating assembly (12) comprising a heating chamber (14) positioned to receive an aerosol-generating substrate (16); a positioning mechanism (18) configured to move the aerosol-generating substrate (16) along the length of the heating chamber (14) based on the temperature of the heating chamber (14); and Equipped with Aerosol generating device (10, 100, 110).

2. The positioning mechanism (18) a movable member (20) disposed within the heating chamber (14), the movable member (20) including a locator (22) on which a user can place the aerosol-generating substrate (16); an actuator (24) configured to displace the movable member (20) within the heating chamber (14) to move the aerosol-generating substrate (16) within the heating chamber (14) along the longitudinal direction from a start position to an end position based on the heating chamber (14) reaching a target temperature; Equipped with The aerosol generating device according to claim 1 .

3. the end position corresponds to the maximum allowable displacement of the movable member (20) within the heating chamber (14) by the actuator (24); The aerosol generating device according to claim 2 .

4. The actuator (24) a phase change material (26) having a volume that is temperature dependent; In use, the increase in volume of the phase change material due to thermal expansion caused by heat from the heating chamber (14) extends the actuator (24) and displaces the movable member (20) to the end position.

4. The aerosol generating device according to claim 2 or 3.

5. The phase change material (26) comprises a wax. The aerosol generating device according to claim 4.

6. The movable member (20) comprises an arm (34); A portion (36) of the arm (34) extends into the heating chamber (14) from a position on one side of the heating chamber (14). The aerosol generating device according to claim 2 .

7. The movable member (20) comprises an arm (34); A portion (36) of the arm (34) extends into the heating chamber (14) from a position below the heating chamber (14). The aerosol generating device according to claim 2 .

8. The positioning mechanism (18) includes an elastic member (27), the elastic member (27) is configured to bias the movable member (20) toward the starting position within the heating chamber (14); The elastic member (27) is configured to strain as the movable member (20) is displaced by the actuator (24) to the end position.

8. The aerosol generating device according to claim 6 or 7.

9. The elastic member (27) includes a mechanical spring (28). The aerosol generating device according to claim 8.

10. The mechanical spring (28) includes a compression spring (30); The compression spring (30) is configured to shorten as the movable member (20) is displaced by the actuator (24) to the end position.

10. The aerosol generating device according to claim 9 when dependent on claim 6.

11. The mechanical spring (28) includes a tension spring (32); The tension spring (32) is configured to extend as the movable member (20) is displaced by the actuator (24) to the end position.

10. The aerosol generating device according to claim 9 when dependent on claim 7.

12. The locator (22) comprises a cup (38) having a sidewall (40) and a base (42); The aerosol-generating substrate (16) can be placed in the cup (38). The aerosol generating device according to claim 2 .

13. The cup (38) The base (42) has at least one opening (44); In use, air can flow from outside the cup (38) to inside the cup (38) through the at least one opening (44). The aerosol generating device according to claim 12.

14. The cup (38) said side wall (40) having at least one opening (44); In use, air can flow from outside the cup (38) to inside the cup (38) through the at least one opening (44).

14. The aerosol generating device according to claim 12 or 13.

15. The base (42) of the cup (38) includes a raised central portion (46).

14. The aerosol generating device according to claim 12 or 13.

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