Test article for use in an aerosol-generating device

Abstract

A test article for insertion into a heating chamber of an aerosol-generating device is provided. The test article includes an elongate body configured to be received within a heating chamber of an aerosol-generating device. The test article includes a heatable substrate configured to be received within the elongate body. The heatable substrate is configured to be heated when the test article is located within the heating chamber of the aerosol-generating device. The heatable substrate is a non-aerosol-generating substrate. In other words, the heatable substrate is not a heatable substrate that can be configured to generate an aerosol suitable for consumption by a consumer. A test system including the test article and an aerosol-generating device, and a method of testing an aerosol-generating device using the test article are also provided.

Description

Technical Field

[0001] This invention relates to a test article for insertion into the heating chamber of an aerosol generating apparatus or a heating apparatus. This disclosure also relates to a test system comprising a test article and an aerosol generating apparatus, and a method for testing the aerosol generating apparatus using the test article. Background Technology

[0002] Aerosol generating devices that heat a heatable matrix to produce an aerosol without burning the heatable matrix are known in the art. The heatable matrix is ​​typically housed within a test article along with other components such as filters. The test article may be strip-shaped for insertion into the heating chamber of the aerosol generating device. Heating elements are typically arranged within or around the heating chamber to heat the heatable matrix once the test article is inserted into the heating chamber. During use of the test article, volatile compounds are released from the heatable matrix via heat transfer from a heat source and are entrained in the air drawn through the test article. As the released compounds cool, they condense to form an aerosol.

[0003] A heating chamber may be arranged within the housing of an aerosol generating device and form part of the airflow path through the aerosol generating device. Testing the heating performance of an aerosol generating device may require heating different articles suitable for use with the device. It is known that aerosol generating devices may need to undergo a relatively large number of continuous heating cycles, particularly in which the device's power supply is depleted and recharged in each heating cycle. Because performing such tests would require periodic replacement of articles throughout the testing period, using actual aerosol-generated articles containing an aerosol-generating matrix such as tobacco material can be very expensive and time-consuming. This may be particularly relevant when performing long-life cycle performance testing on the power supply or heating element of an aerosol generating device. Life cycle performance testing of an aerosol generating device may involve starting and stopping the aerosol generating device and its heating element for more than 10,000 heating cycles. During each heating cycle, it may be necessary to repeatedly replace, consume, and remove the aerosol-generated articles. Summary of the Invention

[0004] Therefore, it is desirable to provide a test setup for aerosol generation devices or heating devices that reduces test costs and length.

[0005] According to this disclosure, a test article for insertion into a heating chamber configured to receive an aerosol-generating article is provided. The test article may include an elongated body configured to be received within the heating chamber. The test article may include a heatable matrix configured to be received within the elongated body. The heatable matrix may be configured to be heated when the test article is located within the heating chamber. The heatable matrix may be a non-aerosol-generating matrix. In other words, the heatable matrix may not be a heatable matrix configured to generate an aerosol suitable for consumption or inhalation by a consumer.

[0006] The heating chamber can be the heating chamber of an aerosol generating apparatus. However, those skilled in the art will understand that any heating or testing apparatus having a heating chamber configured for heating aerosol-generated articles may be suitable.

[0007] According to the present invention, a test article is provided for insertion into the heating chamber of an aerosol generating apparatus. The test article includes an elongated body configured to be received within the heating chamber of the aerosol generating apparatus. The test article includes a heatable matrix configured to be received within the elongated body. The heatable matrix is ​​configured to be heated when the test article is located within the heating chamber of the aerosol generating apparatus. The heatable matrix is ​​a non-aerosol generating matrix. In other words, the heatable matrix is ​​not a heatable matrix configured to generate aerosols suitable for consumption or inhalation by a consumer.

[0008] According to this disclosure, a testing system is provided, comprising a test article according to this disclosure and a heating device, the heating device including a heating chamber for receiving an aerosol-generated article. The heating device may include a heating chamber and a heating element for heating the article received in the heating chamber. Preferably, the heating element is used to heat the article received in the heating chamber from the outside. Preferably, the heating element is an induction heating element. Preferably, the heating device is an aerosol-generating device.

[0009] By providing test articles suitable for aerosol generation devices that include a heatable matrix as a non-aerosol generation substrate, the test articles can be used and heated multiple times within the aerosol generation device. This advantageously makes such articles suitable for testing, thus eliminating the need for continuous removal and replacement of articles compared to testing using actual heatable test articles, and reducing testing costs and runtime.

[0010] A heatable matrix is ​​a non-aerosol-generating matrix. A non-aerosol-generating matrix is ​​considered to be a matrix not constructed to generate aerosols suitable for consumption or inhalation by a consumer. For example, a heatable matrix may not include plant material. A heatable matrix may not include tobacco material. A heatable matrix may not include aerosol-forming agents such as glycerol.

[0011] Preferably, the heatable matrix comprises a fibrous material. Preferably, the fibrous material is substantially heat-resistant. The heatable matrix may comprise synthetic fibers. Preferably, the synthetic fibers are substantially heat-resistant. The heatable matrix may comprise carbon fibers, carbon fabrics, carbon fibers, carbon staple fibers, or carbon pulp. The heatable matrix may comprise aramid fibers, aramid fabrics, aramid fibers, aramid staple fibers, or aramid pulp. The heatable matrix may comprise para-aramid fibers, para-aramid fabrics, para-aramid fibers, para-aramid staple fibers, or para-aramid pulp. The heatable matrix may comprise Kevlar fibers, Kevlar fabrics, Kevlar fibers, Kevlar staple fibers, or Kevlar pulp. TM It can be purchased from DuPont de Nemours, Inc.

[0012] The heatable matrix can comprise a mixture of any of the above-mentioned materials. In particular, the heatable matrix can comprise a mixture of carbon fibers, fabrics, short fibers, lint, or pulp with aramid fibers, fabrics, short fibers, lint, or pulp. The heatable matrix can also comprise a mixture of carbon fibers, lint, or pulp with kevlar fibers, lint, or pulp. Preferably, the heatable matrix is ​​air-permeable, thereby allowing airflow through the heatable matrix if air is drawn through the test article. The inventors have discovered that such materials, such as carbon or aramid, provide a heatable, non-aerosol-generating matrix that is reusable and durable, while mimicking the draw resistance and energy absorption characteristics of heatable matrices such as tobacco-based matrices.

[0013] The aerosol generating or heating device of the testing system may have a distal end and an inlet end. The aerosol generating or heating device may include a body. The body or housing of the aerosol generating or heating device may define a device cavity for removably receiving a test article at the inlet end of the device. The aerosol generating or heating device may include a heating element or heater for heating a heatable matrix when the test article is received within the device cavity.

[0014] In use, the test article may be partially inserted into the device cavity or heating chamber of the corresponding aerosol generating device (or heating device). To heat the heatable matrix, when the test article is fully inserted into the cavity, the heatable matrix is ​​generally aligned with one or more electric heating elements of the aerosol generating device. It should be understood that the term "fully inserted" describes the position of the test article within the cavity of the aerosol generating device when it is in the intended position for heating. It does not require the entire length of the test article to be within the cavity. When the test article is fully inserted into the cavity, a portion of the test article (e.g., the orifice) may protrude from the cavity.

[0015] As used herein, the term “length” refers to the dimension of a component of a test article or heating device (or aerosol generating device) in the longitudinal direction from the farthest upstream or distal end of the component to the farthest downstream or proximal end of the component.

[0016] As used herein, the term "longitudinal" refers to the direction corresponding to the main longitudinal axis of the test article or aerosol generating device, extending between the upstream and downstream ends of the test article or aerosol generating device. As used herein, the terms "upstream" and "downstream" describe the relative position of an element or portion of an element of the test article or aerosol generating device with respect to the direction in which air can be drawn through the test article or aerosol generating device during use. During testing, air can be drawn through the test article in the longitudinal direction.

[0017] The device cavity may be referred to as the heating chamber of the aerosol generating device. The device cavity may extend between a distal end and an inlet or proximal end. The distal end of the device cavity may be a closed end, while the inlet or proximal end may be an open end. The test article may be inserted into the device cavity or heating chamber through the open end of the device cavity. The device cavity may be cylindrical in shape to conform to the same shape as the test article.

[0018] The phrase "received within" can refer to the fact that a component or element is wholly or partially received within another component or element. For example, the phrase "the test article is received within a device cavity" means that the test article is wholly or partially received within the device cavity of the test article. When the test article is received within a device cavity, the test article may be adjacent to the distal end of the device cavity. When the test article is received within a device cavity, the test article may be substantially close to the distal end of the device cavity. The distal end of the device cavity may be defined by an end wall.

[0019] The length of the device cavity can be between approximately 10 mm and approximately 50 mm. The length of the device cavity can be between approximately 20 mm and approximately 40 mm. The length of the device cavity can be between approximately 25 mm and approximately 30 mm.

[0020] The diameter of the device cavity can be between approximately 4 mm and approximately 10 mm. The diameter of the device cavity can be between approximately 5 mm and approximately 9 mm. The diameter of the device cavity can be between approximately 6 mm and approximately 8 mm. The diameter of the device cavity can be between approximately 7 mm and approximately 8 mm. The diameter of the device cavity can be between approximately 7 mm and approximately 7.5 mm.

[0021] The diameter of the device cavity can be substantially equal to or larger than the diameter of the test article. Alternatively, the diameter of the device cavity can be the same as the diameter of the test article to ensure a tight fit.

[0022] The device cavity can be configured to establish a tight fit with the test article received within the device cavity. A tight fit can refer to a close fit, compression fit, or interference fit. The aerosol generating device may include a peripheral wall. Such a peripheral wall may define a device cavity or a heating chamber. The peripheral wall defining the device cavity can be configured to engage with the test article received within the device cavity in a tight fit manner, such that when the test article is received within the device, there is substantially no gap or void between the peripheral wall defining the device cavity and the test article.

[0023] Such a tight fit can establish an airtight fit or structure between the device cavity and the test article received therein.

[0024] With this airtight structure, there will be virtually no gaps or empty spaces for air to flow between the periphery of the device cavity and the test specimen.

[0025] A tight fit with the test article can be established along the entire length of the device cavity or along a portion of the length of the device cavity.

[0026] An aerosol generating apparatus may include an airflow passage extending between a channel inlet and a channel outlet. The airflow passage may be configured to establish fluid communication between the interior of the apparatus cavity and the exterior of the aerosol generating apparatus. The airflow passage of the aerosol generating apparatus may be defined within the housing of the aerosol generating apparatus to allow fluid communication between the interior of the apparatus cavity and the exterior of the aerosol generating apparatus. When a test article is received within the apparatus cavity, the airflow passage may be configured to supply airflow to the article.

[0027] The airflow passage of the aerosol generating device may be defined within or by the peripheral wall of the device housing. In other words, the airflow passage may be defined within the thickness of the peripheral wall or by the inner surface of the peripheral wall, or a combination of both. The airflow passage may be partially defined by the inner surface of the peripheral wall and may also be partially defined within the thickness of the peripheral wall. The inner surface of the peripheral wall defines the outer peripheral boundary of the device cavity.

[0028] The airflow channel of the aerosol generating device can extend from an inlet located at or near the inlet end of the aerosol generating device to an outlet away from the inlet end of the device. The airflow channel can extend in a direction parallel to the longitudinal axis of the aerosol generating device.

[0029] The heater can be any suitable type of heater. Preferably, the heater is an external heater.

[0030] Preferably, when the test article is received within the aerosol generating apparatus, the heater can heat the test article from the outside. This external heater can confine the test article when it is inserted into or received within the aerosol generating apparatus.

[0031] In some embodiments, the heater is arranged to heat the heatable substrate from the outside. In some embodiments, the heater is arranged to be inserted into the heatable substrate when it is received within the cavity. The heater may be located within the device cavity or the heating chamber.

[0032] The heater may include at least one heating element. The at least one heating element may be of any suitable type. In some embodiments, the device includes only one heating element. In some embodiments, the device includes multiple heating elements. The heater may include at least one resistance heating element. Preferably, the heater includes multiple resistance heating elements. Preferably, the resistance heating elements are electrically connected in parallel. Advantageously, providing multiple resistance heating elements electrically connected in parallel facilitates the delivery of desired power to the heater while reducing or minimizing the voltage required to deliver the desired power. Advantageously, reducing or minimizing the voltage required to operate the heater facilitates reducing or minimizing the physical size of the power supply.

[0033] Suitable materials for forming at least one resistance heating element include, but are not limited to: semiconductors, such as doped ceramics, electrically "conductive" ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, nickel alloys, cobalt alloys, chromium alloys, aluminum alloys, titanium alloys, zirconium alloys, hafnium alloys, niobium alloys, molybdenum alloys, tantalum alloys, tungsten alloys, tin alloys, gallium alloys, manganese alloys, and iron alloys, as well as alloys based on nickel, iron, cobalt, stainless steel, etc. And superalloys of iron-manganese-aluminum alloys.

[0034] In some embodiments, at least one resistance heating element includes one or more imprinted portions of a resistive material (such as stainless steel). Alternatively, at least one resistance heating element may include a heating wire or filament, such as a Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wire.

[0035] In some embodiments, at least one heating element includes an electrically insulating substrate, wherein at least one resistance heating element is disposed on the electrically insulating substrate.

[0036] The electrically insulating substrate can comprise any suitable material. For example, it can comprise one or more of the following: paper, glass, ceramics, anodized metals, coated metals, and polyimide. Ceramics can comprise mica, alumina (Al₂O₃), or zirconium oxide (ZrO₂). Preferably, the electrically insulating substrate has a thermal conductivity of less than or equal to about 40 W / m·Kelvin, preferably less than or equal to about 20 W / m·Kelvin, and ideally less than or equal to about 2 W / m·Kelvin.

[0037] The heater may include a heating element comprising a rigid electrically insulating substrate having one or more conductive rails or wires disposed on its surface. The size and shape of the electrically insulating substrate allow it to be directly inserted into the heatable substrate. If the electrically insulating substrate is not rigid enough, the heating element may include additional reinforcement. Current may flow through the one or more conductive rails to heat the heating element and the heatable substrate.

[0038] In some embodiments, the heater includes an induction heating device. The induction heating device may include an inductor coil and a power supply configured to provide a high-frequency oscillating current to the inductor coil. As used herein, a high-frequency oscillating current means an oscillating current with a frequency between about 500 kHz and about 30 MHz. Advantageously, the heater may include a DC / AC inverter for converting DC current supplied by a DC power supply into alternating current. The inductor coil may be arranged to generate a high-frequency oscillating electromagnetic field when receiving the high-frequency oscillating current from the power supply. The inductor coil may be arranged to generate a high-frequency oscillating electromagnetic field within a device cavity. In some embodiments, the inductor coil may substantially define a device cavity. The inductor coil may extend at least partially along the length of the device cavity.

[0039] The heater of an aerosol generating apparatus or heating apparatus may include an induction heating element. The induction heating element may be a sensor element. As used herein, the term "sensor element" refers to an element comprising a material capable of converting electromagnetic energy into heat. When the sensor element is located in an alternating electromagnetic field, the sensor is heated. The heating of the sensor element may be a result of at least one of hysteresis losses and eddy currents induced in the sensor, depending on the electrical and magnetic properties of the sensor material.

[0040] The sensor element can be arranged such that when the test article is received in the cavity of the aerosol generating apparatus, the oscillating electromagnetic field generated by the sensor coil induces a current in the sensor element, thereby causing the sensor element to heat up. In these embodiments, the aerosol generating apparatus is preferably capable of generating a fluctuating electromagnetic field with a magnetic field strength (H field strength) between 1 kA / m and 5 kA / m, preferably between 2 kA / m and 3 kA / m, for example, about 2.5 kA / m. Preferably, the electrically operated aerosol generating apparatus is capable of generating a fluctuating electromagnetic field with a frequency between 1 MHz and 30 MHz, for example, between 1 MHz and 10 MHz, for example, between 5 MHz and 7 MHz.

[0041] In these embodiments, the receptor element is preferably positioned in contact with a heatable substrate. In some embodiments, the receptor element is located within an aerosol generating apparatus. In these embodiments, the receptor element may be located within a device cavity or a heating chamber. The aerosol generating apparatus may include only one receptor element. The aerosol generating apparatus may include multiple receptor elements. In some embodiments, the receptor element is preferably arranged to heat the outer surface of the heatable substrate.

[0042] Most preferably, the test article includes a receptor or receptor element. The receptor is preferably located within a heatable matrix. The receptor may be positioned in contact with the heatable matrix. The receptor may extend along the heatable matrix. The receptor may extend substantially parallel to the longitudinal axis of the elongated body. The receptor may be substantially aligned with the central longitudinal axis defined by the elongated body. The receptor is preferably embedded within the heatable matrix.

[0043] The receptor can be inserted into a heatable substrate. The material of the heatable substrate can surround the receptor. The material of the heatable substrate can wrap around the receptor. The heatable substrate can define a shell into which the receptor can be inserted. This advantageously allows the receptor to be replaced, as the receptor may deteriorate before reaching the surrounding heatable substrate. The receptor and the heatable substrate can define a heatable segment or a heatable substrate segment.

[0044] The receptor element may comprise any suitable material. The receptor element may be formed from any material capable of being inductively heated to a temperature sufficient to release volatile compounds from the heatable matrix. Suitable materials for elongated receptor elements include graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, nickel-containing compounds, titanium, and composites of metallic materials. Some receptor elements comprise metals or carbon. Advantageously, the receptor element may comprise or be composed of ferromagnetic materials, such as ferritic iron, ferromagnetic alloys (e.g., ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrites. Suitable receptor elements may be aluminum or include aluminum. The receptor element preferably comprises more than about 5%, preferably more than about 20%, more preferably more than about 50%, or more than about 90% ferromagnetic or paramagnetic material. Some elongated receptor elements may be heated to temperatures exceeding about 250 degrees Celsius.

[0045] The sensor element may include a non-metallic core, on which a metallic layer is disposed. For example, the sensor element may include a metallic rail formed on the outer surface of a ceramic core or a matrix.

[0046] Preferably, the elongated body is configured to hold a heatable substrate. The test article may include a substrate cavity for receiving the heatable substrate. The substrate cavity may be defined within the elongated body. The substrate cavity may extend along the elongated body. The cross-section of the substrate cavity may match the shape of the cross-section of the heatable substrate or a heatable substrate segment. The heatable substrate segment preferably has a substantially rectangular cross-section. Therefore, the cross-section of the substrate cavity may be rectangular to match the shape of the heatable substrate segment.

[0047] Preferably, the elongated body is formed of a polymer material. More preferably, the elongated body is formed of a plastic material. Even more preferably, the elongated body is formed of a thermoplastic material such as polyetheretherketone (PEEK). Plastic materials such as PEEK have been found to be suitable for withstanding the high temperatures inside a heating chamber. Furthermore, PEEK has a suitable level of heat resistance and mechanical strength for this test application.

[0048] The elongated body can extend between a distal end and a proximal end. The distal end may also be referred to as the first end or upstream end. The proximal end may also be referred to as the second end, oral end, or downstream end.

[0049] The two ends of the elongated body can be open. In other words, each end of the elongated body defines an opening. In such embodiments, the elongated body can be hollow. The elongated body may include a hollow tube, preferably cylindrical.

[0050] The elongated body can define an air passage extending downstream from the distal end to the proximal end. The elongated body can also define an air passage extending upstream from the downstream end. This air passage allows for airflow testing of the aerosol generating device and the test article, as well as testing of any suction sensors present within the aerosol generating device.

[0051] Alternatively, the two ends of the elongated body are substantially closed. In other words, the two ends of the elongated body include end faces or walls. In such embodiments, a portion of the elongated body may not be hollow. In other words, a portion of the elongated body may be solid. Preferably, the proximal or upper portion of the elongated body is solid. This allows the elongated body to absorb heat.

[0052] The size or dimensions of the matrix cavity can be configured such that the heatable matrix is ​​retained within the matrix cavity upon insertion. Preferably, the matrix cavity is defined by the inner cavity surface of the elongated body, and the cavity surface is configured to establish an interference fit or compression fit with a portion of the heatable matrix. In other words, the matrix cavity can engage with a portion of the heatable matrix to retain the heatable matrix therein. The heatable matrix, particularly when comprising fibrous or woven materials, can expand within the matrix cavity, thereby further retaining the matrix material within the elongated body.

[0053] The test article may include an insertion port for providing access to a matrix cavity for a heatable matrix. The insertion port may be defined on an elongated body. Before the test article is inserted into the heating chamber of the test article, the heatable matrix may be inserted into the matrix cavity of the article via the insertion port. The insertion port allows for easy removal and insertion of the heatable matrix into the test article. A portion of the insertion port may be configured to position or retain the heatable matrix within the elongated body. A portion of the insertion port may be configured to position the heatable matrix within the elongated body. A portion of the insertion port may be configured to retain the heatable matrix within the elongated body. A portion of the insertion port may be configured to position and retain the heatable matrix within the elongated body.

[0054] An insertion aperture may extend between two opposing end portions of the insertion aperture. The opposing end portions of the insertion aperture may be configured to position or retain the heatable matrix within an elongated body. A portion of the insertion aperture may be configured to establish an interference fit, compression fit, or tight fit with a portion of the heatable matrix. In other words, a portion of the heatable matrix may engage with an end portion of the insertion aperture so that the heatable matrix is ​​retained within the matrix cavity. The insertion aperture may be an insertion groove. An insertion groove or aperture can advantageously facilitate the replacement of the heatable matrix and the receptor (if present), and facilitate the positioning of the matrix cavity during such replacement.

[0055] The insertion port may be located along the elongated body. In other words, the insertion port may extend along the elongated body. The insertion port may extend in a direction parallel to the longitudinal axis defined by the elongated body. The insertion port may be located on the sidewall or peripheral wall of the elongated body. In such embodiments, a heatable substrate, along with a sensor (if present), may be inserted into the elongated body via one side of the body. The insertion port may be located on the bottom or upstream half of the elongated body.

[0056] Alternatively, the insertion aperture may be located at an end of the elongated body. In other words, the insertion aperture may be provided on the end wall of the elongated body. The insertion aperture may extend along a direction perpendicular to the longitudinal axis defined by the elongated body. The insertion aperture may be located at the distal or upstream end of the elongated body. In such embodiments, a heatable substrate, along with a sensor (if present), may be inserted into the elongated body via an end of the body.

[0057] The insertion orifice preferably covers the matrix cavity of the test article. This facilitates the insertion and removal of the matrix from the test article, the matrix of which may include receptors. The shape of the insertion orifice is preferably substantially rectangular.

[0058] The test article may also include one or more cooling openings for establishing fluid communication between the heatable matrix and the exterior of the test article, wherein the one or more cooling openings are defined on the elongated body. The cooling openings may be located along the elongated body. In other words, the cooling openings may extend along the elongated body. The cooling openings may extend in a direction parallel to the longitudinal axis defined by the elongated body. The test article may include two cooling openings, wherein the two cooling openings may be longitudinally spaced apart on the elongated body. The cooling openings may be located on the lower, distal, or upstream half of the elongated body. One or more cooling openings may at least partially cover the matrix cavity.

[0059] Cooling openings may be located circumferentially around the periphery of the elongated body. Insertion slots or orifices may be spaced apart from the cooling openings around the periphery of the elongated body. Insertion orifices may be positioned at an angle or circumferential offset from one or more cooling openings. Insertion orifices may be located circumferentially offset from one or more cooling openings by approximately 90 degrees.

[0060] In particular, in embodiments where the ends of the elongated body are closed, one or more cooling openings allow heat dissipation from the heatable matrix during heating, thereby enabling the test article to similarly simulate the airflow and cooling conditions that an aerosol-generating article would be subjected to during normal use.

[0061] The test article may also include a thermal insulation element defining a portion of an elongated body. When the test article includes an insertion aperture or cooling opening, the thermal insulation element may at least partially cover one or more apertures or openings defined on the elongated body. The thermal insulation element may be arranged tightly around the periphery of the elongated body. While the thermal insulation element is preferably arranged tightly around the elongated body, it may be configured to slide along the elongated body, preferably by applying force to overcome any friction. This allows access to the insertion aperture and adjustment of the amount of overlap above the cooling opening. The thermal insulation element preferably defines the entire periphery of the elongated body.

[0062] Each or every insulating element may be in the form of a sleeve or sheath. The test article may include multiple insulating elements arranged at different longitudinal positions along an elongated body. Each or every insulating element may wrap around the elongated body.

[0063] Thermal insulation elements advantageously prevent heat dissipation from the matrix cavity of the test article during testing. Thermal insulation elements may include polyimide materials, films, or tapes. Thermal insulation elements may be adhesive polyimide films. Thermal insulation elements may include Kapton films or tapes. TM Available for purchase from DuPont de Nemours, Inc.

[0064] The thickness of the insulation element can be between approximately 0.2 mm and approximately 0.3 mm. The thickness of the insulation element can be between approximately 0.2 mm and approximately 0.25 mm. The thickness of the insulation element can be between approximately 0.24 mm and approximately 0.3 mm.

[0065] As discussed above, the elongated body may include a hollow tube extending between a distal and proximal end. A heatable matrix may be located within the hollow tube. The heatable matrix may be located within a matrix cavity defined within the hollow tube.

[0066] The test article may include filter segments. The filter segments may be positioned within an elongated body. The filter segments may be located downstream of a heatable substrate. The filter segments may be located at the downstream end or the orifice of the test article. The filter segments may extend from the downstream end or the orifice of the test article.

[0067] The filter segment may include at least one mouthpiece filter segment formed of a fibrous filter material. Suitable fibrous filter materials will be known to those skilled in the art. Particularly preferably, at least one mouthpiece filter segment includes a cellulose acetate filter segment formed of cellulose acetate tow.

[0068] In some preferred embodiments, the filter segment consists of a single mouthpiece filter segment. In alternative embodiments, the filter segment comprises two or more mouthpiece filter segments aligned axially with each other in an adjacent-end-to-end relationship.

[0069] Preferably, the filter segment has a low particle filtration efficiency.

[0070] The diameter of the mouthpiece element can be between approximately 5mm and approximately 10mm. The diameter of the mouthpiece element can be between approximately 6mm and approximately 8mm. The diameter of the mouthpiece element can be between approximately 7mm and approximately 8mm. The diameter of the filter segment can be approximately 7.2mm ± 10%. The diameter of the filter segment can be approximately 7.25mm ± 10%.

[0071] Unless otherwise specified, measure the draw resistance (RTD) of a component or article of manufacture according to ISO 6565-2015. RTD refers to the pressure required to force air through the entire length of the component. The terms "pressure drop" or "draw resistance" for a component or article can also refer to "resistance to draw." These terms generally refer to measurements according to ISO 6565-2015 typically performed at a temperature of about 22 degrees Celsius, a pressure of about 101 kPa (about 760 Torr), and a relative humidity of about 60%, at a volumetric flow rate of about 17.5 ml / s at the output or downstream end of the measured component.

[0072] The suction resistance (RTD) of a filter segment can be at least about 0 mm H2O. The RTD of a filter segment can be at least about 3 mm H2O. The RTD of a filter segment can be at least about 6 mm H2O.

[0073] The RTD of a filter segment may not exceed approximately 12 mm H2O. The RTD of a filter segment may not exceed approximately 11 mm H2O. The RTD of a filter segment may not exceed approximately 10 mm H2O.

[0074] The suction resistance of the filter segment can be greater than or equal to about 0 mm H2O and less than about 12 mm H2O. Preferably, the suction resistance of the filter segment can be greater than or equal to about 3 mm H2O and less than about 12 mm H2O. The suction resistance of the filter segment can be greater than or equal to about 0 mm H2O and less than about 11 mm H2O. Even more preferably, the suction resistance of the filter segment can be greater than or equal to about 3 mm H2O and less than about 11 mm H2O. Even more preferably, the suction resistance of the filter segment can be greater than or equal to about 6 mm H2O and less than about 10 mm H2O. Preferably, the suction resistance of the filter segment can be about 8 mm H2O.

[0075] As described above, the filter segment or mouthpiece filter segment can be formed of fibrous material. The filter segment can be formed of porous material. The filter segment can be formed of biodegradable material. The filter segment can be formed of cellulose material such as cellulose acetate. For example, the filter segment can be formed of bundles of cellulose acetate fibers having a monofilament denier between about 10 and about 15. For example, the filter segment can be formed of relatively low-density cellulose acetate filament bundles, such as cellulose acetate filament bundles comprising fibers with a monofilament denier of about 12.

[0076] Filter segments can be formed from polylactic acid-based materials. Filter segments can also be formed from bioplastic materials (preferably starch-based bioplastic materials). Filter segments can be manufactured by injection molding or extrusion. Bioplastic-based materials are advantageous because they can provide filter segment structures with specific and complex cross-sectional profiles that are simple and inexpensive to manufacture, and can include multiple relatively large airflow channels extending through the filter segment material, providing suitable RTD characteristics.

[0077] Filter segments can be formed from sheets of suitable material that have been rolled, pleated, aggregated, woven, or folded into elements defining multiple longitudinally extending channels. Such sheets of suitable material can be formed from paper, cardboard, polymers (e.g., polylactic acid), or any other cellulose-based, paper-based, or bioplastic-based material. The cross-sectional profile of such filter segments can show the channels as randomly oriented.

[0078] Filter segments can be formed in any other suitable manner. For example, filter segments can be formed from bundles of longitudinally extending tubes. The longitudinally extending tubes can be formed from polylactic acid. Filter segments can be formed by extrusion, molding, lamination, injection molding, or shredding of suitable materials. Therefore, it is preferable to have a low pressure drop (or RTD) from the upstream end to the downstream end of the filter segment.

[0079] The length of a filter segment can be at least about 3 mm. The length of a filter segment can be at least about 5 mm. The length of a filter segment can be equal to or less than about 11 mm. The length of a filter segment can be equal to or less than about 9 mm. The length of a filter segment can be between about 3 mm and about 11 mm. The length of a filter segment can be between about 5 mm and about 9 mm. Preferably, the length of a filter segment can be about 7 mm.

[0080] The test article may include an upstream segment or an anterior segment. The upstream segment may be located within an elongated body. The upstream segment may be located upstream of a heatable matrix. The upstream segment may be positioned adjacent to the heatable matrix. The upstream segment may be located at the upstream end or distal end of the test article. The upstream segment may extend from the upstream end or distal end of the test article.

[0081] The upstream element can be a porous rod element. The upstream element can be formed of an air-impermeable material.

[0082] The upstream element is formed from a hollow tubular segment that defines a longitudinal cavity providing an unrestricted flow path. In such embodiments, as described above, the upstream element can provide protection for the heatable matrix while having minimal impact on the overall suction resistance (RTD) and filtration characteristics of the article.

[0083] The upstream element of the upstream section can be made of any material suitable for use in the test article. The upstream element can be made, for example, of the same material used in one of the other components of the test article (e.g., a filter segment). Suitable materials for forming the upstream element include filter materials, polymer materials, cellulose acetate, or cardboard. The upstream element may include a cellulose acetate rod. The upstream element may include a hollow cellulose acetate tube or a cardboard tube.

[0084] The test article may include hollow tubular segments. The hollow tubular segments may be positioned within an elongated body. The hollow tubular segments may be located downstream of a heatable matrix. The hollow tubular segments may be located upstream of a heatable matrix. The hollow tubular segments may be positioned adjacent to a heatable matrix. The hollow tubular segments may be positioned adjacent to a filter segment. The hollow tubular segments may be located between a heatable matrix and a filter segment. The hollow tubular segments may include cardboard or paper tubes.

[0085] The hollow tubular segment may have an outer diameter between about 5 mm and about 12 mm, for example between about 5 mm and about 10 mm, or between about 6 mm and about 8 mm. In a preferred embodiment, the hollow tubular segment has an outer diameter of 7.2 mm + / - 10%.

[0086] The hollow tubular segment may have an inner diameter. Preferably, the hollow tubular segment may have a constant inner diameter along its length. However, the inner diameter of the hollow tubular segment may vary along its length.

[0087] The hollow tubular segment may have an inner diameter of at least about 2 mm. For example, the hollow tubular segment may have an inner diameter of at least about 4 mm, at least about 5 mm, or at least about 7 mm.

[0088] The hollow tubular segment may have an inner diameter of no more than about 10 mm. For example, the hollow tubular segment may have an inner diameter of no more than about 9 mm, no more than about 8 mm, or no more than about 7.5 mm.

[0089] The hollow tubular segment may have an inner diameter between approximately 2 mm and approximately 10 mm, between approximately 4 mm and approximately 9 mm, between approximately 5 mm and approximately 8 mm, or between approximately 6 mm and approximately 7.5 mm.

[0090] The hollow tubular segment may have an outer diameter of approximately 7.1 or 7.2 mm. The hollow tubular segment may have an inner diameter of approximately 6.7 mm.

[0091] The lumen or cavity of a hollow tubular segment can have any cross-sectional shape. The lumen of a hollow tubular segment can have a circular cross-sectional shape.

[0092] The hollow tubular segment may include a paper-based material. The hollow tubular segment may include at least one layer of paper. The paper may be very stiff. The paper may be rolled paper, such as rolled heat-resistant paper or rolled parchment.

[0093] Preferably, the hollow tubular segment may comprise paperboard. The hollow tubular segment may be a paperboard tube. The hollow tubular segment may be formed from paperboard.

[0094] The hollow tubular segment may be a paper tube. The hollow tubular segment may be a tube formed by spirally wound paper. The hollow tubular segment may be formed from multiple layers of paper. The paper may have a basis weight of at least about 50 g / m², at least about 60 g / m², at least about 70 g / m², or at least about 90 g / m².

[0095] The hollow tubular segment may include a polymer material. For example, the hollow tubular segment may include a polymer membrane. The polymer membrane may include a cellulose membrane. The hollow tubular segment may include low-density polyethylene (HDPE) or polyhydroxyalkanoate (PHA) fibers. The hollow tubular segment may include cellulose acetate tows.

[0096] In the case where the hollow tubular segment includes cellulose acetate filament bundles, the cellulose acetate filament bundles may have a single filament denier between about 2 and about 4 and a total denier between about 25 and about 40.

[0097] Preferably, the matrix cavity of the test article is defined between the hollow tubular segment and the upstream segment. The filter segment, the hollow tubular segment, the upstream segment, and the heatable matrix (and the sensor, if present) are preferably inserted into the elongated body. Such segments preferably define an interference fit or a press fit with the inner circumferential surface of the elongated body. Such segments preferably define an airtight fit with the inner circumferential surface of the elongated body.

[0098] The length of the test specimen can be between approximately 35 mm and approximately 50 mm. The length of the test specimen can be between approximately 38 mm and approximately 47.5 mm. The length of the test specimen can be approximately 40 mm. The length of the test specimen can be approximately 45 mm.

[0099] The outer diameter of the test article can be between approximately 6 mm and approximately 8 mm. The outer diameter of the test article can be between approximately 6.5 mm and approximately 8 mm. The outer diameter of the test article can be between approximately 6.5 mm and approximately 7.5 mm. The outer diameter of the test article can be approximately 7 mm. The outer diameter of the test article can be approximately 7.25 mm.

[0100] The test article may include cooling channels through which coolant flows. The cooling channels may extend through a heatable matrix and may be configured to be in fluid communication with a source of coolant. The inlet and outlet of the cooling channels may be configured to be in fluid communication with a source of coolant to form a cooling loop. The cooling loop may function as a heat exchanger.

[0101] The testing system may also include a coolant source and a pump for pumping coolant from the coolant source through a cooling channel. The coolant source may include a thermostatic bath, in which the pump and coolant are located. The thermostatic bath may be configured to maintain the temperature of the coolant at a predetermined temperature. The pump may be in fluid communication with the inlet and outlet of the cooling channel, allowing coolant to be pumped from the thermostatic bath through the cooling channel. Providing such a cooling channel and cooling arrangement can help prevent overheating of the heatable matrix and sensors (if present), thereby maximizing the lifespan of the heatable matrix and reducing testing costs. Furthermore, providing such a cooling arrangement can simulate the heat exchange and dissipation that occurs during suction, thereby eliminating the need for suction on the test article during testing.

[0102] According to this disclosure, a method for testing an aerosol generating apparatus using a test article according to this disclosure is provided. The method may include the steps of: inserting a test article into a heating chamber including a heating element; performing a test cycle, wherein the test cycle includes: activating the heating element to heat the test article received in the heating chamber; and deactivating the heating element. The heating chamber may be the heating chamber of an aerosol generating apparatus.

[0103] The heating element can be activated by pressing a button on the heating device or aerosol generating device, or by drawing air through the test article (which can be detected by the device's suction sensor). The controller in the device can be configured to control the power supply from the power source to the heating element in order to heat it.

[0104] Each test cycle may include drawing air through the test article. The method preferably includes performing multiple test cycles. The method preferably includes performing at least 100 test cycles, preferably at least 1,000 test cycles, more preferably at least 2,500 test cycles, and even more preferably at least 5,000 test cycles.

[0105] The test method may also include the step of replacing the heatable substrate of the test article with a new heatable substrate. This step can be performed after the above-described multiple test cycles have been executed.

[0106] In embodiments including a test system having the cooling arrangement described above, the test method may include the steps of: inserting a test article into a heating chamber including a heating element; and performing a test cycle, wherein the test cycle includes: activating the heating element to heat the test article received in the heating chamber; operating a pump to allow coolant from a coolant source to flow through a cooling channel; and deactivating the heating element. The heating chamber may be the heating chamber of an aerosol generating device.

[0107] The test article may include a pressure sensor to provide pressure data during testing. The test article may include a temperature sensor to provide temperature data during testing. The testing method may also include a step of obtaining measurement data during a test cycle. The testing method may also include a step of recording measurement data during a test cycle. The measurement data may include one or more of pressure data, suction resistance data, airflow data, and temperature data within the test article or in the heating chamber of the aerosol generating apparatus. The measurement data may include electrical information regarding the power supplied by the apparatus to the heating element.

[0108] The invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any one or more features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0109] EX1. A test article for insertion into a heating chamber configured to receive an aerosol-generating article, the test article comprising:

[0110] An elongated body configured to be received in the heating chamber; and

[0111] A heatable matrix configured to be received within the elongated body, wherein the heatable matrix is ​​configured to be heated when the test article is located in the heating chamber, wherein the heatable matrix is ​​a non-aerosol-generating matrix.

[0112] EX1A. A test article for insertion into the heating chamber of an aerosol generating apparatus, the test article comprising:

[0113] An elongated body, the elongated body being configured to be received in the heating chamber of the aerosol generating apparatus; and

[0114] A heatable matrix configured to be received within the elongated body, wherein the heatable matrix is ​​configured to be heated when the test article is located in the heating chamber of the aerosol generating apparatus, wherein the heatable matrix is ​​a non-aerosol generating matrix.

[0115] EX2. The test article according to any of the foregoing examples, wherein the heatable matrix does not include tobacco material.

[0116] EX3. A test article according to any of the foregoing examples, wherein the heatable matrix comprises a fibrous material.

[0117] EX4. A test article according to any one of Examples EX1-EX3, wherein the heatable matrix comprises carbon fiber, lint, or pulp.

[0118] EX5. A test article according to any one of Examples EX1-EX3, wherein the heatable matrix comprises aramid fibers, lint, or pulp.

[0119] EX6. A test article according to any one of Examples EX1-EX3, wherein the heatable matrix comprises Kevlar fiber, lint, or pulp.

[0120] EX7. A test article according to any one of Examples EX1-EX3, wherein the heatable matrix comprises a mixture of carbon fiber, lint or pulp and aramid fiber, lint or pulp.

[0121] EX8. A test article according to any of the foregoing examples, wherein the elongated body is configured to hold the heatable matrix.

[0122] EX9. The test article according to any of the foregoing examples further includes a matrix cavity for receiving the heatable matrix, the matrix cavity being defined within the elongated body.

[0123] EX10. A test article according to any of the foregoing examples, wherein the elongated body is formed of a polymer material.

[0124] EX11. A test article according to any of the foregoing examples, wherein the elongated body is formed of a plastic material.

[0125] EX12. A test article according to any of the foregoing examples, wherein the elongated body is formed of a thermoplastic material, preferably polyetheretherketone (PEEK).

[0126] EX13. A test article according to any one of Examples EX1-EX12, wherein the elongated body extends between a distal end and a proximal end, wherein both ends of the elongated body are open.

[0127] EX14. A test article according to any one of Examples EX1-EX13, wherein the elongated body defines an air passage extending downstream from the distal end to the proximal end.

[0128] EX15. A test article according to any one of Examples EX1-EX12, wherein the elongated body extends between a distal end and a proximal end, wherein both ends of the elongated body are closed.

[0129] EX16. A test article according to Example EX9, wherein the size of the matrix cavity is set such that the heatable matrix is ​​held within the matrix cavity during insertion.

[0130] EX17. A test article according to Example EX9, wherein the matrix cavity is defined by the inner cavity surface of the elongated body, the cavity surface being configured to establish an interference fit with a portion of the heatable matrix.

[0131] EX18. The test article according to any of the foregoing examples further includes an insertion port for providing access to the matrix cavity for the heatable matrix, the insertion port being defined on the elongated body.

[0132] EX19. A test article according to Example EX18, wherein a portion of the insertion aperture is configured to position or retain the heatable substrate within the elongated body.

[0133] EX20. A test article according to Example EX18, wherein the opposite end portions of the insertion orifice are configured to position or retain the heatable substrate within the elongated body.

[0134] EX21. A test article according to Example EX18, wherein a portion of the insertion orifice is configured to form an interference fit with a portion of the heatable matrix.

[0135] EX22. A test article according to any one of Examples EX18-EX21, wherein the insertion orifice is an insertion groove.

[0136] EX23. A test article according to any one of Examples EX18-EX22, wherein the insertion aperture is located along the elongated body.

[0137] EX24. A test article according to Example EX23, wherein the insertion orifice extends along a direction parallel to the longitudinal axis defined by the elongated body.

[0138] EX25. A test article according to Example EX23 or EX24, wherein the insertion orifice is provided on the side wall or peripheral wall of the elongated body.

[0139] EX26. A test article according to any one of Examples EX18-EX22, wherein the insertion aperture is located at the distal end of the elongated body.

[0140] EX27. A test article according to Example EX26, wherein the insertion aperture extends along a direction perpendicular to the longitudinal axis defined by the elongated body.

[0141] EX28. A test article according to Example EX26 or EX27, wherein the insertion orifice is provided on the distal wall of the elongated body.

[0142] EX29. The test article according to any of the foregoing examples further includes a cooling opening for establishing fluid communication between the heatable substrate and the exterior of the test article, the cooling opening being defined on the elongated body.

[0143] EX30. The test article according to any of the foregoing examples further includes a heat-insulating element defining a portion of the elongated body.

[0144] EX31. A test article according to any of the foregoing examples, wherein the insulating element is covered with one or more orifices or openings defined on the elongated body.

[0145] EX32. A test article according to any one of Examples EX1-EX14, wherein the elongated body includes a hollow tube extending between a distal end and a proximal end, and the heatable matrix is ​​located within the hollow tube.

[0146] EX33. The test article according to Example EX32 further includes a filter segment located within the elongated body and downstream of the heatable matrix.

[0147] EX34. The test article according to Example EX32 or EX33 further includes a hollow tubular segment positioned within the elongated body and downstream of the heatable matrix.

[0148] EX35. The test article according to any one of Examples EX32-EX34 further includes an upstream segment located within the elongated body and upstream of the heatable matrix.

[0149] EX36. The test article according to Example EX32 further includes an upstream segment positioned adjacent to the heatable substrate, a hollow tubular segment positioned adjacent to the heatable substrate, and a filter segment positioned adjacent to the hollow tubular segment, wherein the upstream segment, the hollow tubular segment, and the filter segment are located within the hollow tube.

[0150] EX37. Test articles according to Examples EX34 or EX36, wherein the hollow tubular segment comprises cardboard or paper tube.

[0151] EX38. The test article according to any of the foregoing examples further includes a sensor, wherein the matrix is ​​located within the heatable matrix.

[0152] EX39. A test article according to Example EX38, wherein the receptor extends along the heatable matrix.

[0153] EX40. A test article according to Example EX38, wherein the receptor extends substantially parallel to the longitudinal axis of the elongated body.

[0154] EX41. A test article according to Example EX38, wherein the receptor is substantially aligned with the central longitudinal axis defined by the elongated body.

[0155] EX42. The test article according to any of the foregoing examples further includes a cooling channel for coolant flow, wherein the cooling channel extends through the heatable matrix, and wherein the cooling channel is configured to be in fluid communication with a coolant source.

[0156] EX43. A test article according to Example EX42, wherein the inlet and outlet of the cooling channel are configured to be in fluid communication with a coolant source to form a cooling circuit.

[0157] EX44. A test article according to any of the foregoing examples, wherein the length of the test article is between 35 mm and 45 mm.

[0158] EX45. A test article according to any of the foregoing examples, wherein the outer diameter of the test article is between 6 mm and 8 mm.

[0159] EX46. The test article according to Example EX30 or EX31, wherein the thickness of the thermal insulation element is between 0.2 mm and 0.3 mm.

[0160] EX47. A testing system comprising a test article according to any of the foregoing examples and an aerosol generating apparatus, the aerosol generating apparatus including a heating chamber and a heating element for heating the article received in the heating chamber from the outside.

[0161] EX48. The test system according to Example EX47, wherein the heating element is an induction heating element.

[0162] EX49. A test system comprising a test article according to Example EX42, EX43, or EX47, a coolant source, and a pump for pumping coolant from the coolant source through the cooling channel.

[0163] EX50. A method for testing an aerosol generating device using a test article according to any of the foregoing examples, comprising the following steps:

[0164] The test article is inserted into the heating chamber of the aerosol generating apparatus, which includes a heating element; and

[0165] Execute a test loop, wherein the test loop includes:

[0166] The heating element is activated to heat the test article received in the heating chamber; and

[0167] The heating element is deactivated.

[0168] EX51. A method for testing an aerosol generating apparatus according to Example EX50, wherein each test cycle includes drawing air through the test article.

[0169] EX52. A method for testing an aerosol generating apparatus according to Example EX50 or EX51, wherein multiple test cycles are performed.

[0170] EX53. The method for testing an aerosol generating apparatus according to any one of Examples EX50-EX52 further includes the step of replacing the heatable matrix of the test article.

[0171] EX54. A method for testing an aerosol generating apparatus using a test article of a test system according to Example EX49, the method comprising the following steps:

[0172] The test article is inserted into the heating chamber of the aerosol generating apparatus, which includes a heating element; and

[0173] Execute a test loop, wherein the test loop includes:

[0174] The heating element is activated to heat the test article received in the heating chamber;

[0175] Operate the pump to allow coolant from the coolant source to flow through the cooling passage; and

[0176] The heating element is deactivated. Attached Figure Description

[0177] In the following description, the invention will be further described with reference to the accompanying drawings, wherein:

[0178] Figure 1 An exploded perspective view of a test article according to an embodiment of the present invention is shown;

[0179] Figure 2A and 2B Each showed Figure 1 A schematic side view of the test article shown;

[0180] Figure 3A and 3B Each further demonstrated Figure 1 A schematic side view of an embodiment of the test article shown;

[0181] Figure 4A and 4B Each shows a schematic side view of another embodiment of the test article according to the invention;

[0182] Figure 5 A schematic side view of another embodiment of the test article according to the present invention is shown;

[0183] Figure 6A and 6B Each shows a schematic side view of another embodiment of the test article according to the invention;

[0184] Figure 7 A schematic side cross-sectional view of the test system according to the present invention is shown; and

[0185] Figure 8 A schematic side cross-sectional view of another test system according to the present invention is shown. Detailed Implementation

[0186] Figure 1 A test article 1 for an aerosol generating apparatus is shown. The test article 1 is configured to be inserted into the heating chamber of the aerosol generating apparatus and to be heated therein.

[0187] The test article 1 includes a cylindrical elongated body 14 extending between a distal end 2 and a proximal end 3. The test article 1 includes a heatable substrate 12 configured to be received by the elongated body 14. Figure 1 As shown, the test article 1 also includes a receptor 11 arranged to be received within a heatable matrix 12. The heatable matrix 12 and the receptor 11 define a heatable matrix segment 23. The heatable matrix 12 comprises a mixture of carbon fibers and aramid fibers and does not include plant-based materials such as tobacco. The elongated body 14 is formed of PEEK.

[0188] Test article 1 includes a matrix cavity 18 defined within an elongated body 14. For example... Figure 2B As shown, the heatable matrix segment 23 is configured to be fully received within (or inserted into) the matrix cavity 18 via an insertion slot 15. The insertion slot 15 is positioned along the elongated body 14. In other words, the insertion slot 15 is located on one side of the elongated body 14. Therefore, the heatable matrix segment 23 is inserted through one side of the elongated body 14.

[0189] like Figure 2B As shown, opposing portions 181, 182 of the inner surface defining the matrix cavity 18 are configured to engage with the matrix segment 23 upon insertion and to retain the matrix segment within the cavity 18. The insertion slot 15 also provides means for guiding the matrix segment 23 into the cavity 18.

[0190] like Figure 1 and 2A As shown, the test article 1 includes at least two cooling openings 16, 17 covering the matrix cavity 18. Figure 2A As shown, cooling openings 16, 17 are positioned along the lower (or upstream) portion of the elongated body 14 and are longitudinally spaced from each other. Cooling openings 16, 17 are configured to provide fluid communication between the cavity 18 and the exterior of the test article 1, such that heat from the heatable matrix segment 23 can be dissipated when the test article 1 is heated in the aerosol generating device or heating device during testing.

[0191] Furthermore, test article 1 includes three insulating sleeves 13 defining an elongated body 14. The three insulating sleeves 13 are spaced apart longitudinally along the elongated body 14. Figure 2A As shown, one insulating sleeve portion of the insulating sleeve 13A is covered with two cooling openings 16, 17. Figure 3B As shown, the same insulating sleeve 13A portion is covered by the insertion groove 18. Each insulating sleeve 13 is formed of polyimide material.

[0192] exist Figure 1 , 2A In the embodiment of 2B, the two ends 2 and 3 of the elongated body 14 are closed. Figure 3B The diagram schematically illustrates the insertion of a heatable substrate segment 23 into an elongated body 14 via an insertion slot 15. The length h of the elongated body 14 is approximately 40 mm, and the outer diameter b of the elongated body 14 is 7 mm.

[0193] Figure 4A and 4B The embodiments shown are similar to Figure 1 , 2A The first embodiments of 2B, 3A, and 3B differ in that the elongated body 104 is a hollow tube having an open distal end and an open proximal end. Therefore, the test article 10 includes a hollow elongated body 104 that defines an air passage extending between the open distal end 2 and the open proximal end 3. Thus, air can flow through the test article 10 during aspiration testing. Figure 4A and 4B In one embodiment, the length h of the elongated body 14 is approximately 40 mm, and the outer diameter b of the elongated body 14 is 7 mm. Given that the elongated body is hollow, the inner diameter r is limited. i As an example, the inner diameter of such a sleeve may be approximately 5 mm. An insulating sleeve (not shown) may be provided around the insertion slot 15.

[0194] Figure 5 The embodiments shown are similar to Figure 4A and 4B The second embodiment differs in that the insertion port 1005 of the test article 100 is located at the distal end 3 of the elongated body 1004 instead of along one side of the elongated body, and no insulating sleeve or cooling opening is provided. The elongated body 1004 is also hollow. An upstream or lower portion of the elongated body 1004 defines a matrix cavity 18. The matrix cavity 18 is defined by an inner surface of the hollow elongated body 1004. This inner surface is sized such that it is configured to receive a heatable matrix segment 23 and retain the heatable matrix segment within the matrix cavity 18. Figure 5As shown, the cross-section of cavity 18 is substantially rectangular to correspond to the substantially rectangular cross-section of the heatable substrate segment 23. Air can flow through the distal end 3 of the elongated body 1004, through the heatable substrate segment 23, and exit from the proximal end 2 of the elongated body 1004. The length h and outer diameter b can be equivalent to... Figure 4A and 4B Examples of implementations.

[0195] Figure 6A and 6B The embodiments shown are intended to more closely simulate, in terms of components, articles of heatable aerosol generation. The test article 40 includes an elongated body 414 in the form of a hollow tube. The elongated body 414 is made of PEEK. The elongated body 414 accommodates, in a linear, continuous sequence and adjacently, an upstream segment 413, a heatable matrix segment 423, a hollow tubular segment 416 defining a cavity 422, and a filter segment 418. The upstream segment 413 and the hollow tubular segment 422 define a matrix cavity that receives the heatable matrix segment 423.

[0196] The heatable matrix segment 423 includes a heatable matrix 413 and an elongated receptor element 411 centrally located within the heatable matrix 413. In other words, the receptor element 411 is embedded within the heatable matrix 413. The heatable matrix 413 comprises aramid fibers. The hollow tubular segment 416 is made of cardboard. The filter segment 418 is a cellulose acetate rod. The upstream segment 413 is also a cellulose acetate rod, but may also include a hollow tubular segment. Air can flow axially through the test article 40. Figure 6A and 6B In one embodiment, the length of the elongated body 14 is approximately 45 mm, and the outer diameter of the elongated body 14 is approximately 7.25 mm.

[0197] Figure 7 A test system 700 is shown, which includes test articles 1, 10, 40, 100 according to any embodiment described in this disclosure and an aerosol generating device or heating device 70, said aerosol generating device or heating device including a power supply 706. Figure 7 As shown, test article 1 is received within the heating chamber 710 of the aerosol generating apparatus 70. The aerosol generating apparatus 70 includes a heating element or heater 702 defining a portion of the heating chamber 710. The heating element 702 is an induction heating element and is arranged to inductively heat the heatable matrix segment of the test article 1 from the outside. The heating element 702 is arranged to be activated or powered by a power supply 706 via a controller (not shown). A suction sensor (not shown) may also be provided in the heating apparatus 70. Air can be drawn through the airflow passage of the apparatus 70 and pass through or surround the test article 1.

[0198] Figure 8A schematic diagram of a test system 800 is shown, comprising a test article according to one of the embodiments described herein, inserted into a heating chamber 17 of a test apparatus or aerosol generating apparatus. The test article 1 includes a cooling channel 24 through which a coolant flows. The cooling channel 24 extends through a heatable matrix 12 and is configured to be in fluid communication with a coolant source 5. The coolant source 5 includes a pump 51 located therein. The inlet and outlet of the cooling channel 24 are configured to be in fluid communication with the coolant source 5 to form a cooling loop. More specifically, the inlet and outlet of the cooling channel 24 are in fluid communication with the pump 51 to form a cooling loop. The pump 51 is arranged to pump coolant from the coolant source 5 through the cooling channel 24. A portion of the cooling channel 24 is arranged close to a sensor element 11 to extract heat from the sensor element. The cooling channel 24 extending through the heatable matrix 12 also extracts heat from the heatable matrix 12. This test system 800 is not arranged to be suctioned, and the cooling loop is configured to simulate the cooling level provided by air flowing through the aerosol generating article.

[0199] For the purposes of this specification and the appended claims, unless otherwise indicated, all figures representing quantities, quantities, percentages, etc., shall be understood to be modified by the term "about" in all cases. Furthermore, all ranges include the disclosed maximum and minimum points, and include any intermediate ranges therein, which may or may not be specifically listed herein. Thus, in this context, the number A is understood as A ± 10% A. Within this context, the number A can be considered as a value within the general standard error for the measurement of the attribute modified by the number A. In some cases used in the appended claims, the number A may deviate from the percentages listed above, provided that the amount of deviation from A does not materially affect the essential and novel features of the claimed invention. Furthermore, all ranges include the disclosed maximum and minimum points, and include any intermediate ranges therein, which may or may not be specifically listed herein.

Claims

1. A test article for insertion into the heating chamber of an aerosol generating apparatus, the test article comprising: An elongated body configured to be received in the heating chamber of the aerosol generating apparatus; as well as A heatable matrix configured to be received within the elongated body, wherein the heatable matrix is ​​configured to be heated when the test article is located in the heating chamber of the aerosol generating apparatus, wherein the heatable matrix is ​​a non-aerosol generating matrix.

2. The test article according to claim 1, wherein the heatable matrix does not include tobacco material.

3. The test article according to claim 1 or 2, wherein the heatable matrix comprises a fibrous material.

4. The test article according to claim 1 or 2, wherein the heatable matrix comprises carbon fiber, lint, or pulp.

5. The test article according to claim 1 or 2, further comprising a matrix cavity for receiving the heatable matrix, the matrix cavity being defined within the elongated body.

6. The test article according to claim 1 or 2, wherein the elongated body is formed of a thermoplastic material.

7. The test article according to claim 1 or 2, further comprising a cooling opening for establishing fluid communication between the heatable substrate and the exterior of the test article, the cooling opening being defined on the elongated body.

8. The test article according to claim 1 or 2, further comprising a heat-insulating element defining a portion of the elongated body.

9. The test article according to claim 1 or 2 further includes a sensor located within the heatable matrix.

10. The test article of claim 9, wherein the receptor extends along the heatable substrate.

11. The test article according to claim 6, wherein, The elongated body is formed of polyetheretherketone.

12. A testing system comprising a test article according to any one of claims 1 to 11 and an aerosol generating apparatus, the aerosol generating apparatus comprising a heating chamber and a heating element for receiving the test article in the heating chamber from the outside for heating.

13. A method for testing an aerosol generating device using a test article according to any one of claims 1 to 11, comprising the following steps: The test specimen is inserted into the heating chamber of the aerosol generating apparatus, which includes a heating element; as well as Execute a test loop, wherein the test loop includes: The heating element is activated to heat the test article received in the heating chamber; as well as The heating element is deactivated.

14. The method for testing an aerosol generating apparatus according to claim 13, wherein each test cycle includes drawing air through the test article.

15. The method for testing an aerosol generating apparatus according to claim 13 or 14, wherein multiple test cycles are performed.

16. A method for testing an aerosol generating apparatus using a test article according to any one of claims 1 to 11, the test article further comprising a cooling channel through which a coolant flows, wherein the cooling channel extends through the heatable matrix, and wherein the cooling channel is configured to be in fluid communication with a coolant source, wherein the inlet and outlet of the cooling channel are configured to be in fluid communication with a coolant source to form a cooling circuit, wherein the method comprises the following steps: The test specimen is inserted into the heating chamber of the aerosol generating apparatus, which includes a heating element; as well as Execute a test loop, wherein the test loop includes: The heating element is activated to heat the test article received in the heating chamber; Operate the pump to allow coolant from the coolant source to flow through the cooling passage; and The heating element is deactivated.

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