Tobacco rod, aerosol generating article including the same, and aerosol generating device to be used therewith

Abstract

The present invention relates to a tobacco rod including a first filter segment, a second filter segment located upstream of the first filter segment, and a cavity segment formed by the first filter segment and the second filter segment, the cavity segment being filled with tobacco granules, the tobacco granules including tobacco fine powder therein, and susceptor fine powder heated by a variable magnetic field, an aerosol-generating article including the same, and an aerosol-generating device for use therewith.

Description

[Technical Field]

[0001] The present invention relates to a tobacco rod, an aerosol-generating article including the same, and an aerosol-generating device used therewith. Specifically, the present invention relates to a tobacco rod having a specific morphology in which susceptors are present inside tobacco granules, an aerosol-generating article including the same, and an aerosol-generating device used therewith.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0145622 dated October 28, 2021, and incorporates all of the contents disclosed in the documents of the relevant Korean patent application as part of this specification. [Background technology]

[0003] Recently, there has been an increasing demand for alternative smoking articles that overcome the shortcomings of traditional cigarettes. For example, there has been an increasing demand for devices that generate aerosols by electrically heating cigarette sticks (e.g., cigarette-type electronic cigarettes). Accordingly, active research is being conducted on electrically heated aerosol generators and the cigarette sticks (or aerosol-generating articles) that are applied to them.

[0004] While tobacco sheets have been primarily used as tobacco material in cigarette sticks used in electrically heated aerosol generators, recently, methods have been proposed in which granular tobacco material is used instead of sheets, such as applying the granular tobacco to a cartridge or to a stick.

[0005] When applying the granular tobacco material to a stick, the granules are packed into the empty space of a cavity filter contained in the stick. When heating the stick, it is preferable to heat only the cavity filter to prevent increased impregnation of the humectant that generates atomization in the remaining filter, reduced atomization, deformation of the adhesive contained in the filter, and changes in the physical properties of the filter. Methods for heating the cavity filter are broadly divided into contact heaters and non-contact heaters, but contact heaters with a rod, blade, or cylindrical structure have been pointed out as having disadvantages such as difficulty in uniformly heating the tobacco granules and a tendency for carbonization to occur at the contact surface, which negatively affects the tobacco taste.

[0006] Recently, a method has been proposed in which a non-contact heater is used instead of the contact heater to heat the granules uniformly and bring out the unique tobacco flavor without carbonization, using a susceptor that generates heat through induction heating.

[0007] However, since the effectiveness of uniformly heating the entire tobacco granules may vary depending on how the susceptor is mixed with the tobacco granules, research and development into a method of mixing a susceptor with the tobacco granules in the cavity filter and then heating them is currently required. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Republic of Korea Patent Publication No. 10-2021-0064306 Summary of the Invention [Problem to be solved by the invention]

[0009] In order to solve the above problems, the present inventors aim to provide a tobacco rod that can uniformly heat the entire granules without carbonization due to a specific form in which susceptors are present inside the tobacco granules present in the cavity filter of the tobacco rod, thereby enabling the unique tobacco flavor to be expressed without carbonization, an aerosol-generating article including the same, and an aerosol-generating device to be used therewith. [Means for solving the problem]

[0010] According to a first aspect of the present invention, A tobacco rod is provided, comprising: a first filter segment; a second filter segment located upstream of the first filter segment; and a cavity segment formed by the first filter segment and the second filter segment, wherein the cavity segment is filled with tobacco granules, the tobacco granules containing tobacco fine particles therein, and susceptor fine powder that is heated by a variable magnetic field.

[0011] In one embodiment of the present invention, the tobacco granules may have a core-shell structure in which the susceptor fine powder is agglomerated in the central core, and the tobacco fine powder is agglomerated in the form of a shell surrounding the core.

[0012] In one embodiment of the present invention, the tobacco fine powder and the susceptor fine powder may be randomly mixed and have an agglomerated form.

[0013] In one embodiment of the present invention, the tobacco granules may further contain moisture.

[0014] In one embodiment of the present invention, the tobacco granules may contain 50 to 70% by weight of tobacco fine powder, 20 to 40% by weight of susceptor fine powder, and 5 to 15% by weight of moisture, based on the total weight of the tobacco granules.

[0015] In one embodiment of the present invention, the cavity segment may include a composite granule structure in the form of two or more of the tobacco granules combined together.

[0016] In one embodiment of the present invention, the composite granule structure may be a single-layer structure in which the tobacco granules are combined in the form of a single layer, or a multi-layer structure in which two or more layers are stacked.

[0017] In one embodiment of the present invention, the first filter segment and the second filter segment may each comprise a paper material.

[0018] In one embodiment of the present invention, the susceptor fine powder may include a material selected from the group consisting of aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, mild steel, stainless steel, copper, bronze, and combinations thereof.

[0019] According to a second aspect of the present invention,

[0020] An aerosol-generating article for use with an aerosol-generating device is provided, the aerosol-generating article comprising the tobacco rod and a filter rod positioned downstream of the tobacco rod, the filter rod including a cooling segment and a mouthpiece segment positioned downstream of the cooling segment.

[0021] According to a third aspect of the present invention, The aerosol generating device includes the aerosol generating article, a storage space for the aerosol generating article, a battery, and a coil, the coil surrounding the cavity segment, and receives power from the battery to generate a variable magnetic field and heat the susceptor. [Effects of the Invention]

[0022] The tobacco rod, the aerosol-generating article including the same, and the aerosol-generating device used therewith according to the present invention have a unique structure in which a susceptor is located inside tobacco granules present in a cavity filter, which facilitates heat transfer from the heated susceptor to the tobacco granules, thereby allowing the tobacco granules to be heated uniformly, thereby minimizing carbonization and enabling the unique tobacco flavor to be expressed. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram illustrating an example of an aerosol generating device according to an embodiment of the present invention. [Figure 2] 1 is a schematic illustration of an aerosol-generating article according to one embodiment of the present invention. [Figure 3] FIG. 1 is a schematic illustration of a tobacco granule having a core-shell morphology in one embodiment of the present invention. [Figure 4] 1 is a schematic illustration of a tobacco granule having a randomly mixed form of tobacco fine powder and susceptor fine powder in accordance with an embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will now be described in more detail.

[0025] The terms and words used in this specification and claims should not be interpreted in a limited way to their ordinary or dictionary meanings, but should be interpreted in a way that is appropriate to the technical idea of ​​the present invention, in accordance with the principle that the inventor can appropriately define the concept of the term in order to best explain his / her invention.

[0026] The terms used in the present invention are merely used to describe specific embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless the context clearly indicates otherwise. In the present invention, the terms "comprise" or "have" and the like are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0027] The terms "front side" and "rear side" used in the present invention are defined relative to the aerosol flow.

[0028] The term "aerosol-forming agent" as used herein may refer to a substance that can facilitate the formation of visible smoke and / or aerosol. Examples of aerosol-forming agents include, but are not limited to, glycerin (GLY), propylene glycol (PG), ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. In the art, the term "aerosol-forming agent" may be used interchangeably with terms such as humectant and moisturizer.

[0029] The term "aerosol-forming substrate" used in the present invention may refer to a substance capable of forming an aerosol. The aerosol may contain a volatile compound. The aerosol-forming substrate may be solid or liquid. For example, a solid aerosol-forming substrate may contain a solid substance based on tobacco materials such as flat tobacco, shredded tobacco, or reconstituted tobacco, while a liquid aerosol-forming substrate may contain a liquid composition based on nicotine, tobacco extract, and / or various flavoring agents. However, the scope of the present disclosure is not limited to such examples. The aerosol-forming substrate may further contain an aerosol-forming agent for stably forming visible smoke and / or aerosol.

[0030] The term "aerosol generating device" used in the present invention may refer to a device that generates an aerosol using an aerosol-forming substrate to generate an aerosol that can be inhaled directly into the user's lungs through the user's mouth.

[0031] The term "aerosol-generating article" as used herein may refer to an article capable of generating an aerosol. The aerosol-generating article may include an aerosol-forming substrate. A representative example of an aerosol-generating article is a cigarette, although the scope of the present disclosure is not limited thereto.

[0032] As used herein, the terms "upstream" or "upstream direction" refer to a direction away from the user's (smoker's) mouth, and "downstream" or "downstream direction" may refer to a direction toward the user's mouth. The terms upstream and downstream may be used to describe the relative positions of elements constituting an aerosol-generating article. For example, in the aerosol-generating article 1 illustrated in FIG. 2, the tobacco rod 11 is located upstream or in the upstream direction of the filter rod 12, and the filter rod 12 is located downstream or in the downstream direction of the tobacco rod 11.

[0033] As used herein, the term "longitudinal direction" may refer to a direction corresponding to the longitudinal axis of the aerosol-generating article.

[0034] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily understand and practice the present invention. However, as the present invention may be embodied in many different forms, it is not limited to the embodiments set forth herein.

[0035] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0036] Conventional aerosol-forming articles and devices that use tobacco rods containing tobacco granules have a problem that when a contact heater is used, the temperature is high on the contact surface due to its structure, but conversely, it is difficult for the non-contact surface to be heated to the appropriate temperature. This results in carbonization due to localized differences in heating temperature, which makes it difficult to express the unique tobacco flavor.

[0037] Therefore, in order to solve the above problems, the inventors have invented a tobacco rod that uses a non-contact induction heater and susceptor, but in which the susceptor is located inside the tobacco granules in a unique configuration, so that the susceptor generates heat individually, thereby uniformly heating the entire tobacco granules and preventing carbonization, while allowing smokers to feel satisfied through the unique tobacco taste, as well as an aerosol-generating article including the same, and an aerosol-generating device to be used therewith.

[0038] As shown in FIG. 2, in one embodiment of the present invention, the tobacco rod 11 includes a first filter segment 111, a second filter segment 112 located upstream of the first filter segment 111, and a cavity segment 113 formed by the first filter segment 111 and the second filter segment 112, and the cavity segment 113 is filled with tobacco granules, which contain tobacco fine particles therein and a susceptor that is heated by a variable magnetic field.

[0039] 2, in one embodiment of the present invention, the tobacco rod 11 includes a first filter segment 111, a second filter segment 112 located upstream of the first filter segment 111, and a cavity segment 113 formed by the first filter segment 111 and the second filter segment 112. The tobacco rod 11 is a tobacco rod including a cavity or cavity segment, and can deliver tobacco components (or smoking components) such as nicotine when heated. The cavity segment 113 can be filled with tobacco granules, i.e., a granular tobacco material.

[0040] Specifically, the first filter segment 111 can form the cavity segment 113 and filter and cool the aerosol, and can be located downstream of the cavity segment 113. The second filter segment 112 can form the cavity segment 113 and prevent tobacco particles from falling out. Furthermore, when the aerosol-generating article 1 is inserted into the aerosol-generating device 2, the second filter segment 112 can position the cavity segment 113 appropriately within the aerosol-generating device 2, prevent the tobacco rod 11 from falling out, and prevent aerosol liquefied from the tobacco rod 11 during smoking from flowing into the aerosol-generating device 2.

[0041] In one embodiment of the present invention, the suction resistance of the first filter segment 111 or the second filter segment 112 may be 50 mmH20 / 60 mm or more, 75 mmH20 / 60 mm or more, 90 mmH20 / 60 mm or more, 105 mmH20 / 60 mm or more, or 120 mmH20 / 60 mm or more, and the suction resistance of the first filter segment 111 or the second filter segment 112 may be 150 mmH20 / 60 mm or less, 140 mmH20 / 60 mm or less, 130 mmH20 / 60 mm or less, 120 mmH20 / 60 mm or less, 110 mmH20 / 60 mm or less, 100 mmH20 / 60 mm or less, 90 mmH20 / 60 mm or less, 80 mmH20 / 60 mm or less, or 70 mmH20 / 60 mm or less. Suitable suction performance can be ensured within these numerical ranges. In addition, the appropriate suction performance increases the probability of vortex airflow occurring within the cavity segment 113, thereby ensuring uniform heating of a large number of tobacco particles. In addition, when the first filter segment 111 and the second filter segment 113 are paper filters, the appropriate atomization amount is guaranteed within the above numerical range.

[0042] In one embodiment of the present invention, the first filter segment 111 and the second filter segment 112 may each include a paper material.

[0043] In one embodiment of the present invention, the first filter segment 111 may include a paper material, i.e., may be made of a paper filter. The paper material may be preferably arranged in the lengthwise direction to ensure a smooth airflow path, but is not limited thereto. The paper material is hardly denatured by heat, and therefore can be more easily applied to the tobacco rod than cellulose acetate fiber, which melts or shrinks when heated above a certain temperature.

[0044] In one embodiment of the present invention, the first filter segment 111 may include a water-resistant or oil-resistant paper material. When the first filter segment 111 includes the water-resistant or oil-resistant paper material, the problem of a reduction in the visible amount of atomization (e.g., a reduction in the amount of atomization in smoke mode) caused by smoke components (e.g., moisture, aerosol-forming agent components) contained in the aerosol being absorbed while passing through the first filter segment 111 can be significantly alleviated. For example, when the first filter segment 111 includes a general paper material, the moisture-absorbent nature of the paper material can absorb the smoke components, reducing the visible amount of atomization. However, when the water-resistant or oil-resistant paper material is used, the absorption of the smoke components hardly occurs, thereby solving the problem of a reduction in the amount of atomization.

[0045] In one embodiment of the present invention, the first filter segment 111 may be made of a cellulose acetate filter, which can improve the removal ability of the first filter segment 111.

[0046] In one embodiment of the present invention, the second filter segment 112 may include a paper material, i.e., may be a paper filter. The paper material may be preferably arranged in the lengthwise direction to ensure a smooth airflow path, but is not limited thereto. The paper material is heat-resistant and can significantly mitigate the problem of accelerated tobacco particle shedding caused by melting or shrinking upon contact with the internal heating element when using cellulose acetate fiber.

[0047] In one embodiment of the present invention, the second filter segment 112 may include a water-resistant or oil-resistant paper material, and as described above in the description of the first filter segment 111, the water-resistant or oil-resistant paper material has the effect of significantly reducing the problem of reduced visible atomization.

[0048] 2, in one embodiment of the present invention, the tobacco rod 11 includes a cavity segment 113 formed by the first filter segment 111 and the second filter segment 112. The cavity segment 113 is a segment with a cavity and can be located between the first filter segment 111 and the second filter segment 112. That is, the cavity segment 113 can be formed by the first filter segment 111 and the second filter segment 112.

[0049] The cavity segment 113 can be manufactured in various ways. For example, the cavity segment 113 can be manufactured in the form of a tube-shaped structure such as a paper tube, or can be manufactured by wrapping a cavity formed by two filter segments with a wrapper made of an appropriate material, but the manufacturing method is not particularly limited thereto as long as it can be filled with tobacco granules.

[0050] 2, in one embodiment of the present invention, the cavity segment 113 is filled with tobacco granules. The tobacco granules have a significantly lower moisture and / or aerosol-forming agent content than other types of tobacco materials (e.g., tobacco shreds, tabular tobacco, etc.), which can significantly reduce visible smoke generation, thereby facilitating the implementation of a smokeless function in the aerosol generating device 2. However, the diameter, density, filling rate, composition ratio of constituent materials, heating temperature, etc. of the tobacco granules can vary and may vary depending on the embodiment.

[0051] In one embodiment of the present invention, the diameter of the tobacco granules may be approximately 0.4 mm to 1.2 mm. Within this range, the appropriate hardness and ease of manufacturing of the tobacco granules may be ensured, and the probability of vortex currents occurring within the cavity segment 113 may be increased.

[0052] In one embodiment of the present invention, the size of the tobacco granules may be about 15 mesh to 50 mesh, and preferably about 20 mesh to 40 mesh. Within this numerical range, appropriate hardness and ease of manufacturing of the tobacco granules are ensured, shedding is minimized, and the probability of vortex currents occurring within the cavity segment 113 can be increased.

[0053] In one embodiment of the present invention, the density of the tobacco granules is about 0.5 g / cm 3 ~1.2g / cm 3 and preferably about 0.7 g / cm 3 ~1.0g / cm 3 Within this range, the tobacco granules can have an appropriate hardness, and the probability of vortex currents occurring within the cavity segment 113 can be increased.

[0054] In one embodiment of the present invention, the hardness of the tobacco granules may be about 80% or more, preferably 85% or 90% or more, and more preferably 91%, 93%, 95%, or 97% or more. Within this range, the ease of manufacturing the tobacco granules may be improved, and the phenomenon of fragmentation may be minimized, thereby improving the ease of manufacturing the aerosol-generating article 1. In this embodiment, the hardness of the tobacco granules may be a value measured in accordance with the national standard test method KSM-1802 ("Test Method for Activated Carbon"). For details on the hardness measurement method and the meaning of the measured values, please refer to the national standard KSM-1802.

[0055] In one embodiment of the present invention, the heating temperature of the tobacco granules may be approximately 260°C, 250°C, 240°C, or 230°C or less. In other words, the heating element can heat the tobacco rod 11 at a heating temperature within the illustrated range. Within this range, the problem of the tobacco granules being overheated and resulting in a burnt taste can be resolved. Furthermore, a proper smoking taste is ensured while the generation of visible smoke is minimized, thereby easily realizing the smokeless function of the aerosol generator 2. To be more specific, tobacco materials such as cut tobacco and flakes only develop a satisfactory smoking taste when heated to approximately 270°C or higher, whereas tobacco granules can develop a satisfactory smoking taste and easily suppress the generation of visible smoke even at lower temperatures. Furthermore, these characteristics make tobacco granules more suitable for realizing the smokeless function of the aerosol generator 2 than other types of tobacco materials.

[0056] In one embodiment of the present invention, the wet basis nicotine content of the tobacco granules is about 1.0% to 4.0%, preferably about 1.5% to 3.5%, 1.8% to 3.0%, or 2.0% to 2.5%, within this range, an appropriate level of smoking experience can be ensured.

[0057] In one embodiment of the present invention, the dry basis nicotine content of the tobacco granules is about 1.2% to 4.2%, and preferably about 1.7% to 3.7%, 2.0% to 3.2%, or 2.2% to 2.7%, within this range, an appropriate level of smoking experience can be ensured.

[0058] As shown in Figures 3 and 4, in one embodiment of the present invention, the tobacco granules 13 contain tobacco fine particles therein and susceptor fine particles that are heated by a variable magnetic field.

[0059] The term "fine particles" used in the present invention may refer to particles having a particle size of approximately 40 μm or less, preferably 20 μm to 30 μm. The term "fine particles" is introduced to more specifically describe the tobacco or susceptor constituting the tobacco granules from the perspective of the manufacturing method. The fine particles may grow in size by agglomeration, for example, by layering, and in some cases, the boundaries between the individual fine particles may not be distinct. Therefore, when the present invention is not describing particle size, the term "fine particles" may be omitted. The tobacco fine particles may be obtained by grinding tobacco components, such as ordinary tobacco leaves, to the above-mentioned size.

[0060] 3 and 4, in one embodiment of the present invention, the tobacco granules 13 include a susceptor therein that is heated by a variable magnetic field. The susceptor is a particulate material that can be heated by induction heating, specifically by heating using a variable magnetic field, using a heating element of the aerosol generator. For example, the aerosol generator 2 can be configured to include an induction coil 23 for induction heating the susceptor material, and for this purpose, multiple susceptors can be disposed inside the tobacco granules 13 contained in the cavity segment 113. The susceptors are preferably disposed such that they have a large contact surface with the tobacco powder, allowing each susceptor to generate heat individually and heat the entire granules uniformly.

[0061] The variable magnetic field generated by the induction coil 23 can heat the susceptor. For example, the tobacco granules 13 can be heated by the susceptor to a temperature of 260°C or less, preferably 220 to 240°C.

[0062] In one embodiment of the present invention, the susceptor may be made of aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, mild steel, stainless steel, copper, bronze, or a combination thereof. The susceptor may have a specific Curie temperature or no Curie temperature depending on the specific material. In this specification, the Curie temperature refers to the temperature at which a material loses its magnetism, and the Curie temperature may vary depending on the type of material.

[0063] In one embodiment of the present invention, the susceptor fine powder may have a diameter of about 40 μm or less, preferably 20 μm to 30 μm, but is not limited thereto. The susceptor fine powder may be agglomerated to form secondary particles of various sizes and shapes.

[0064] 3, in one embodiment of the present invention, the tobacco granules 13 may have a core-shell structure in which the susceptor fine powder 132 is agglomerated in the central core, and the tobacco fine powder 131 is agglomerated in a shell surrounding the susceptor core. When the center-to-center distance between any susceptor 132 located in the core and any tobacco fine powder 131 located in the shell is within a certain distance, the tobacco fine powder 131 is distributed in the shell region, resulting in uniform heating without carbonization. Exemplarily, the diameter ratio of the tobacco granules to the core may be, but is not limited to, 1.5:1 to 2:1.

[0065] As shown in Figures 4(a) and 4(b), in one embodiment of the present invention, the tobacco granules 13 may have a form in which the tobacco fine powder 133 and the susceptor 134 are randomly mixed. In one embodiment of the present invention, the susceptor 134 may be mixed with the tobacco fine powder 133 in a fine powder form. Specifically, the tobacco material and the susceptor may be manufactured in the form of fine particles, and then mixed to manufacture the tobacco granules 13. In this case, the particle diameter of the tobacco fine powder 133 and the fine powder form of the susceptor 134 may each be 40 μm or less, preferably 20 μm to 30 μm. When the fine powder particle size falls within the above range, the tobacco fine powder 133 and the fine powder form of the susceptor 134 can be easily mixed uniformly. As a result, when the susceptor 134 generates heat individually within the tobacco granules 13, the entire tobacco fine powder 133 contained in the tobacco granules 13 can be uniformly heated, which has the effect of preventing the occurrence of carbonization.

[0066] In one embodiment of the present invention, the tobacco granules 13 may further contain moisture. This moisture may be moisture that remains after being reduced through a drying process during the manufacturing process of the tobacco granules 13. In one embodiment of the present invention, the tobacco granules 13 may contain 5 to 15 wt % moisture based on the total weight of the tobacco granules, preferably 5.5 to 12 wt % moisture, and more preferably 6 to 9 wt % moisture. Within this range, visible smoke generation can be significantly reduced, and the smokeless function of the aerosol generating device 2 can be easily realized.

[0067] In one embodiment of the present invention, the tobacco granules 13 may contain 50 to 70 wt % of tobacco fine powder based on the total weight of the tobacco granules, preferably 53 to 67 wt % of tobacco fine powder, and more preferably 57 to 63 wt % of tobacco fine powder. When the tobacco granules 13 contain tobacco fine powder in this range, the long-lasting tobacco flavor, the hardness of the tobacco granules, and the ease of granule production can be ensured.

[0068] In one embodiment of the present invention, the tobacco granules 13 may contain 20 to 40 wt % of susceptor fine powder based on the total weight of the tobacco granules, preferably 23 to 37 wt % of susceptor fine powder, and more preferably 27 to 33 wt % of susceptor fine powder. Within this range, the weight ratio of the susceptor fine powder may vary depending on the type of tobacco fine powder contained in the tobacco granules 13 and the diameter and size of the tobacco granules, and this may vary depending on the embodiment.

[0069] In one embodiment of the present invention, the tobacco granules 13 may contain 1 to 10% by weight of an aerosol-forming agent, and preferably 7%, 5%, 3%, or 1% by weight of an aerosol-forming agent. Alternatively, the tobacco granules 13 may contain no aerosol-forming agent. Within this range, visible smoke generation can be significantly reduced, and the smokeless function of the aerosol generating device 2 can be easily achieved.

[0070] In one embodiment of the present invention, the cavity segment 113 may include a composite granular structure in the form of two or more tobacco granules 13 combined together. The composite granular structure may be a structure formed by combining two or more tobacco granules 13 containing susceptors therein. For example, it may be a structure formed by combining two, three, or four or more tobacco granules 13 containing susceptors therein. The tobacco granules 13 may exist independently within the cavity segment 113, or a composite granular structure formed by combining at least two or more individual tobacco granules 13 may exist within the cavity segment 113. The composite granular structure allows heat transfer not only from the susceptors contained within the tobacco granules 13 but also from the susceptors of adjacent tobacco granules 13 combined together, thereby increasing the total amount of heat supplied from the susceptors to the tobacco fine powder, which has the effect of facilitating uniform heat transfer.

[0071] In one embodiment of the present invention, the composite granular structure may be a single-layer structure in which the tobacco granules 13 are stacked in a single layer, or a multi-layer structure in which two or more layers are stacked. For example, a single-layer structure in which the tobacco granules 13 are stacked horizontally in a single layer, or a multi-layer structure in which separate tobacco granules 13 are stacked vertically above and below the single-layer structure, may be formed. Heat can also be transferred from the susceptors of adjacent tobacco granules 13 through the single-layer structure or multi-layer structure, which increases the total amount of heat supplied from the susceptor to the tobacco fine powder and facilitates uniform heat transfer.

[0072] As shown in Figure 2, in one embodiment of the present invention, the aerosol-generating article 1 is an aerosol-generating article 1 used in conjunction with an aerosol-generating device 2, and includes the tobacco rod 11 and a filter rod 12 located downstream of the tobacco rod 11, and the filter rod 12 includes a cooling segment 121 and a mouthpiece segment 122 located downstream of the cooling segment 121.

[0073] The tobacco rod 11 has been described above in this specification.

[0074] 2, in one embodiment of the present invention, the aerosol-generating article 1 includes a filter rod 12 located downstream of the tobacco rod 11. The filter rod 12 is located downstream of the tobacco rod 11 and is capable of filtering aerosols. To this end, the filter rod 12 may include a filter material such as paper, cellulose acetate fiber, etc. The filter rod 12 may further include a wrapper wrapping the filter material.

[0075] The filter rod 12 may be manufactured in various shapes. For example, the filter rod 12 may be a cylindrical rod or a tubular rod having a hollow interior. The filter rod 12 may also be a recessed rod. If the filter rod 12 is composed of multiple segments, at least one of the multiple segments may be manufactured with a different shape. The filter rod 12 may also be manufactured to emit a flavor. For example, a liquid aroma may be sprayed onto the filter rod 12, or separate fibers coated with the liquid aroma may be inserted into the filter rod. As another example, the filter rod 12 may include at least one capsule (not shown) containing the liquid aroma.

[0076] In one embodiment of the present invention, the filter rod 12 may be composed of multiple segments. For example, the filter rod 12 may be composed of a cooling segment 121 that performs a cooling function for aerosols and a mouthpiece segment 122 that performs a filtering function for aerosols. The filter rod 12 may also include at least one segment that performs another function.

[0077] Specifically, the cooling segment 121 may be manufactured in various forms, for example, a paper tube, a hollow cellulose acetate filter, a cellulose acetate filter with multiple holes, a filter filled with a polymer material or a biodegradable polymer material, etc., but is not limited thereto as long as it can perform the function of cooling the aerosol. The mouthpiece segment 122 may be, for example, a cellulose acetate filter (i.e., a filter made of cellulose acetate fiber), but is not limited thereto.

[0078] In one embodiment of the present invention, the aerosol-generating article 1 can be wrapped in at least one wrapper. For example, the aerosol-generating article 1 can be wrapped in a single wrapper, or wrapped in two or more overlapping wrappers. For example, a tobacco rod can be wrapped in a first wrapper, and a filter rod can be wrapped in a second wrapper. The tobacco rod and filter rod wrapped in separate wrappers can then be combined, and the entire aerosol-generating article can be rewrapped in a third wrapper. If the tobacco rod 11 or the filter rod 12 each comprises multiple segments, each segment can be wrapped in a separate wrapper. Furthermore, the entire aerosol-generating article, consisting of the combined segments wrapped in separate wrappers, can be rewrapped in another wrapper. The wrapper can have at least one hole formed therein, allowing external air to enter or internal gas to escape.

[0079] As shown in FIG. 1, in one embodiment of the present invention, the aerosol generating device 2 includes the aerosol generating article 1, a storage space for the aerosol generating article 1, a battery 21, and a coil 23, and the coil 23 surrounds the cavity segment 113 and receives power from the battery 21 to generate a variable magnetic field and heat the susceptor.

[0080] The aerosol-generating article 1 has been described above in this specification.

[0081] 1, in one embodiment of the present invention, the aerosol generating device 2 includes a storage space for the aerosol-generating article 1. Specifically, a housing forms the exterior of the aerosol generating device 2, and the housing includes a storage space for the aerosol-generating article 1. The aerosol-generating article 1 can be inserted into the storage space along its length and can be easily removed by the user after use.

[0082] 1, in one embodiment of the present invention, the aerosol generating device 2 includes a battery 21. The battery 21 supplies power used to operate the aerosol generating device 2. For example, the battery 21 can supply power to enable the heating element to heat the aerosol-generating article 1 and can supply power necessary to operate the control unit 22. In addition, if the aerosol generating device 2 includes electrical components such as a display, a sensor, or a motor, the battery 21 can supply power necessary to operate these components.

[0083] As shown in FIG. 1, in one embodiment of the present invention, the aerosol generating device may include a control unit 22. The control unit 22 may generally control the operation of the aerosol generating device 2, for example, by controlling the heating temperature of the heating element and the power supplied by the battery 21, and may check the status of each component to determine whether the aerosol generating device 2 is operational. The control unit 22 may be implemented by at least one processor. The control unit 22 may be implemented by an array of multiple logic gates, or by a combination of a general-purpose microcontroller and a memory storing a program executable by the microcontroller. It will be apparent to those skilled in the art that the control unit may be implemented by different types of hardware.

[0084] 1, in one embodiment of the present invention, the aerosol generating device 2 includes a coil 23 that surrounds the cavity segment 113 and receives power from the battery 21 to generate a variable magnetic field to heat the susceptor. Specifically, the coil 23 may be an induction coil for heating by induction heating, and a susceptor that is induction heated by the coil 23 may be included inside the tobacco granules 13 contained in the cavity segment 113 of the aerosol-generating article 1.

[0085] 1, in one embodiment of the present invention, the coil 23 may be positioned to heat only the cavity segment 113. For example, the coil 23 may be positioned to surround only the cavity segment 113, which has the advantage of preventing problems such as melting or shrinking of fibers in a cellulose acetate filter due to heat when the filter segment is heated, and preventing a decrease in the amount of visible atomization due to increased hygroscopicity of the paper material in a paper filter due to heat. Furthermore, deformation and release of adhesive contained in the filter can be reduced, thereby preventing changes in the physical properties of the filter.

[0086] In one embodiment of the present invention, the aerosol-generating device 2 may further include a cartridge containing a liquid aerosol-forming substrate. For example, a heating element connected to the cartridge may heat the liquid aerosol-forming substrate through a liquid transmission means to form an aerosol, which may then be transmitted to the user through the aerosol-generating article 1.

[0087] In one embodiment of the present invention, the aerosol generator 2 can operate in a smokeless mode or a smoked mode. Specifically, the aerosol generator 2 operates in either the smokeless mode or the smoked mode, whichever mode is selected by the user. In the smokeless mode, the aerosol is generated but no visible smoke is generated, while in the smoked mode, visible smoke can be generated along with nicotine transfer, depending on the user's preference.

[0088] As described above, the tobacco rod according to the present invention, the aerosol-generating article including the same, and the aerosol-generating device used therewith apply a non-contact heating method in which a susceptor is specifically formed inside the tobacco granules contained in the cavity segment, thereby preventing carbonization and uniformly heating the tobacco granules, thereby providing a satisfying feeling to the smoker by expressing the unique flavor of tobacco.

[0089] Although the present invention has been described in connection with the preferred embodiment mentioned above, various modifications and variations can be made without departing from the spirit and scope of the invention, and it is therefore intended by the appended claims to cover all such modifications and variations as fall within the spirit and scope of the invention. [Explanation of symbols]

[0090] 1: Aerosol-generating items 11: Tobacco rod 12: Filter rod 13: Tobacco granules 111: First filter segment 112: Second filter segment 113: Cavity segment 121: Cooling segment 122: Mouthpiece segment 131: Cigarettes 132: Susceptor 133: Tobacco fines 134: Susceptor fine powder 2: Aerosol generator 21: Battery 22: Control unit 23: Coil

Claims

1. a first filter segment; a second filter segment located upstream of the first filter segment; and a cavity segment formed by the first filter segment and the second filter segment; the cavity segments are filled with tobacco granules; the tobacco granules contain tobacco fines therein and susceptor fines that are heated by a variable magnetic field; The tobacco granules have a form in which the tobacco fine powder and the susceptor fine powder are randomly mixed and agglomerated. Tobacco rod.

2. The tobacco rod of claim 1 , wherein the tobacco granules further comprise moisture.

3. The tobacco granules are 50 to 70% by weight of tobacco fines, 20 to 40 wt. % susceptor fines, and 3. The tobacco rod of claim 2, comprising 5 to 15% by weight moisture.

4. 2. The tobacco rod of claim 1, wherein the cavity segment comprises a composite granular structure in the form of two or more of the tobacco granules combined together.

5. The composite granular structure comprises:

5. The tobacco rod according to claim 4, wherein the tobacco granules are a single-layer structure in which the tobacco granules are combined in a single layer form, or a multi-layer structure in which two or more layers are stacked.

6. 10. The tobacco rod of claim 1, wherein the first filter segment and the second filter segment each comprise a paper material.

7. 10. The tobacco rod of claim 1, wherein the susceptor fines comprise a material selected from the group consisting of aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, mild steel, stainless steel, copper, bronze, and combinations thereof.

8. 1. An aerosol-generating article for use with an aerosol-generating device, comprising: A tobacco rod according to any one of claims 1 to 7, and a filter rod located downstream of the tobacco rod; The filter rod comprises a cooling segment and a mouthpiece segment located downstream of the cooling segment.

9. The aerosol-generating article of claim 8. a storage space for the aerosol-generating article; a battery and a coil; The coil surrounds the cavity segment and receives power from the battery to generate a variable magnetic field and heat the susceptor.

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