Cigarette and aerosol generation device for cigarette

Abstract

To provide a cigarette that may provide adequate draw resistance in smoking and may cool a main stream of vapor to a safe temperature.SOLUTION: A cigarette 3 includes a tobacco rod 31, a front end plug 33 near a front end of the tobacco rod, a filter rod 32 near a rear end of the tobacco rod, and a wrapper 35 surrounding the tobacco rod, the front end plug and the filter rod and including at least one perforation formed in an area to prevent air from flowing to the inside.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a cigarette and an aerosol generating device for a cigarette, and more particularly to a cigarette including perforations for allowing air to flow therein, and an aerosol generating device for a cigarette. [Background technology]

[0002] Recently, there has been an increasing demand for alternative methods to overcome the shortcomings of conventional cigarettes. For example, there has been an increasing demand for a method in which an aerosol is generated by heating an aerosol generating material in a cigarette, rather than a method in which an aerosol is generated by burning a cigarette. As a result, research into heated cigarettes or heated aerosol generating devices has been actively conducted. Summary of the Invention [Means for solving the problem]

[0003] According to one embodiment, a cigarette may include a tobacco rod; a front end plug adjacent a front end of the tobacco rod; a filter rod adjacent a rear end of the tobacco rod; and a wrapper that encases the tobacco rod, the front end plug, and the filter rod and includes at least one perforation formed in an area to allow air to flow therein.

[0004] According to another embodiment, the aerosol generating device may include a heater that heats a cigarette including a tobacco rod, a filter rod, a front end plug adjacent to the front end of the tobacco rod, and a flank having perforations formed therein through which air can flow; a vaporizer that vaporizes a liquid composition to generate an aerosol and transfers the aerosol to the inside of the cigarette via the front end plug; and a controller that controls the operation of the heater and vaporizer. Effect of the Invention

[0005] According to one embodiment, the cigarette includes a plug at its front end and perforations formed in the horn to provide a suitable resistance to draw when smoked.

[0006] According to one embodiment, the cigarette includes a cooling element and perforations formed in a wrapper that encases the cooling element to allow mainstream smoke to be cooled to a safe temperature. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a diagram illustrating an example in which a cigarette is inserted into the aerosol generating device. [Diagram 2] FIG. 2 is a diagram illustrating an example in which a cigarette is inserted into the aerosol generating device. [Diagram 3] FIG. 2 is a diagram illustrating an example in which a cigarette is inserted into the aerosol generating device. [Figure 4] FIG. 1 illustrates a cigarette according to one embodiment. [Diagram 5] FIG. 2 illustrates a cigarette according to one embodiment having perforations formed therein. [Figure 6] 1 is a longitudinal cross-sectional view of a cigarette illustrating the flow of air through the cigarette according to one embodiment. [Figure 7] 1 is a longitudinal cross-sectional view of a cigarette illustrating the flow of air through the cigarette according to one embodiment. [Figure 8] FIG. 2 is a diagram illustrating points at which mainstream smoke temperature and cigarette surface temperature were measured in a cigarette according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] According to one embodiment, a cigarette may include a tobacco rod; a front end plug adjacent a front end of the tobacco rod; a filter rod adjacent a rear end of the tobacco rod; and a wrapper that encases the tobacco rod, the front end plug, and the filter rod and includes at least one perforation formed in an area to allow air to flow therein.

[0009] Additionally, the at least one perforation can reduce the resistance to draw increased by the front end plug.

[0010] The wrapper also includes an inner wrapper and an outer wrapper encasing the inner wrapper, at least one perforation is formed in the outer wrapper, and the inner wrapper is also made of a porous material.

[0011] At least one perforation is also disposed circumferentially about the horn.

[0012] At least one perforation is also formed in an area of ​​the wrapper that encases the tobacco rod.

[0013] At least one perforation is also formed in an area of ​​the wrapper that encases the filter rod.

[0014] The filter rod also includes a hollow space through which air can flow, and the inside diameter of the filter rod is also between 2.0 mm and 4.5 mm.

[0015] The filter rod is also made of PLA (polylactide) material.

[0016] At least one perforation is also formed in the trumpet at a position spaced 15 to 22 mm forward from the rear end of the filter rod.

[0017] Additionally, when one portion of the cigarette is inserted inside an aerosol generating device that includes a heater that heats the tobacco rod, the at least one perforation can be located in another portion.

[0018] The filter rod may also include a first segment for cooling the aerosol, and a second segment adjacent to the rear end of the first segment for filtering a predetermined component in the aerosol.

[0019] The filter rod may also include a flavoring agent therein.

[0020] According to another embodiment, the aerosol generating device may include a heater that heats a cigarette including a tobacco rod, a filter rod, a front end plug adjacent to the front end of the tobacco rod, and a flank having perforations formed therein through which air can flow; a vaporizer that vaporizes a liquid composition to generate an aerosol and transfers the aerosol to the inside of the cigarette through the front end plug; and a controller that controls the operation of the heater and the vaporizer.

[0021] The terms used in this embodiment are currently common terms that are used as much as possible while taking into consideration the functions of the present invention, but they may vary depending on the intentions of the engineers in the field, precedents, or the emergence of new technologies. In addition, in certain cases, the applicant may arbitrarily select terms, and in such cases, the meanings of the terms will be described in detail in the description of the invention. Therefore, the terms used in this invention must be defined based on the meanings of the terms and the overall content of the present invention, rather than simply by the names of the terms.

[0022] Throughout the specification, when a part "includes" a certain component, it does not mean excluding other components, but may further include other components, unless otherwise specified to the contrary. Furthermore, terms such as "... unit" and "... module" described in the specification mean a unit that processes at least one function or operation, and they are embodied by hardware or software, or a combination of hardware and software.

[0023] Throughout the specification, "aerosol-generating article" refers to a material capable of generating an aerosol, such as a cigarette or cigar. The aerosol-generating article may include an aerosol-generating substance or an aerosol-forming substrate. The aerosol-generating article may also include solid substances based on tobacco material, such as tabular tobacco, cut tobacco, or reconstituted tobacco. The aerosol may include volatile compounds.

[0024] Also, throughout the specification, "upstream" or "forward" means a direction away from the mouth of a user inhaling the aerosol-generating article, and "downstream" or "rearward" means a direction closer to the mouth of a user inhaling the aerosol-generating article.

[0025] In the following, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0027] 1 to 3 are diagrams illustrating an example in which a cigarette is inserted into an aerosol generating device.

[0028] 1, the aerosol generation device 1 includes a battery 11, a control unit 12, and a heater 13. 2 and 3, the aerosol generation device 1 further includes a vaporizer 14. In addition, a cigarette 3 may be inserted into the internal space of the aerosol generation device 1.

[0029] Components related to the present embodiment are illustrated in the aerosol generating device 1 illustrated in Figures 1 to 3. Therefore, it would be understood by a person skilled in the art of the present embodiment that the aerosol generating device 1 may further include other general components in addition to the components illustrated in Figures 1 to 3.

[0030] In addition, although the aerosol generating device 1 is illustrated in FIGS. 2 and 3 as including the heater 13, the heater 13 may be omitted if necessary.

[0031] In Fig. 1, the battery 11, the control unit 12, and the heater 13 are illustrated as being arranged in a line. In Fig. 2, the battery 11, the control unit 12, the vaporizer 14, and the heater 13 are illustrated as being arranged in a line. In Fig. 3, the vaporizer 14 and the heater 13 are illustrated as being arranged in parallel. However, the internal structure of the aerosol generating device 1 is not limited to that illustrated in Figs. 1 to 3. In other words, the arrangement of the battery 11, the control unit 12, the heater 13, and the vaporizer 14 may be changed depending on the design of the aerosol generating device 1.

[0032] When the cigarette 3 is inserted into the aerosol generation device 1, the aerosol generation device 1 can activate the heater 13 and / or the vaporizer 14 to generate an aerosol. The aerosol generated by the heater 13 and / or the vaporizer 14 passes through the cigarette 3 and is delivered to the user.

[0033] If necessary, the aerosol generation device 1 can heat the heater 13 even when the cigarette 3 is not inserted in the aerosol generation device 1.

[0034] The battery 11 supplies power used for the operation of the aerosol generation device 1. For example, the battery 11 can supply power so that the heater 13 or the vaporizer 14 can be heated, and can supply power necessary for the operation of the control unit 12. The battery 11 can also supply power necessary for the operation of a display, a sensor, a motor, and the like provided in the aerosol generation device 1.

[0035] The control unit 12 generally controls the operation of the aerosol generation device 1. Specifically, the control unit 12 controls the operation of not only the battery 11, the heater 13, and the vaporizer 14, but also other components included in the aerosol generation device 1. The control unit 12 can also check the state of each component of the aerosol generation device 1 and determine whether the aerosol generation device 1 is in an operable state.

[0036] The control unit 12 includes at least one processor. The processor may be realized by an array of a number of logic gates, or may be realized by a combination of a general-purpose microprocessor and a memory storing a program that can be executed by the microprocessor. Those skilled in the art will understand that the controller 12 may also be realized by other types of hardware.

[0037] The heater 13 can be heated by power supplied from the battery 11. For example, when the cigarette 3 is inserted into the aerosol generating device 1, the heater 13 is located outside the cigarette 3. Therefore, the heated heater 13 can increase the temperature of the aerosol generating material inside the cigarette 3.

[0038] The heater 13 may be an electric resistive heater. For example, the heater 13 may include an electric conductive track, and the heater 13 may be heated by passing an electric current through the electric conductive track. However, the heater 13 is not limited to the above example, and may be any heater that can be heated to a desired temperature. Here, the desired temperature may be preset in the aerosol generating device 1, or may be set to a desired temperature by a user.

[0039] Meanwhile, as another example, the heater 13 may be an induction heating heater. Specifically, the heater 13 may include an electrically conductive coil for heating the cigarette 3 in an induction heating manner, and the cigarette 3 may include a susceptor that can be heated by the induction heating heater.

[0040] For example, the heater 13 may include a tube-type heating element, a plate-type heating element, a needle-type heating element, or a rod-type heating element, and depending on the form of the heating element, the inside or outside of the cigarette 3 can be heated.

[0041] Furthermore, a plurality of heaters 13 may be disposed in the aerosol generation device 1. In this case, the plurality of heaters 13 are disposed so as to be inserted inside the cigarette 3, and also disposed outside the cigarette 3. Furthermore, some of the plurality of heaters 13 are disposed so as to be inserted inside the cigarette 3, and the rest are disposed outside the cigarette 3. Furthermore, the shape of the heater 13 is not limited to the shapes illustrated in Figs. 1 to 3, and various shapes may be produced.

[0042] The vaporizer 14 can heat the liquid composition to generate an aerosol, and the generated aerosol can pass through the cigarette 3 and be transmitted to the user. In other words, the aerosol generated by the vaporizer 14 can move along an airflow passage of the aerosol generating device 1, and the airflow passage is also configured so that the aerosol generated by the vaporizer 14 can pass through the cigarette 3 and be transmitted to the user. The vaporizer 14 can heat the liquid composition to generate an aerosol, and emit the aerosol toward the cigarette so that the aerosol passes through the cigarette inserted in the cigarette insertion section.

[0043] For example, the vaporizer 14 may include, but is not limited to, a liquid storage unit, a liquid transfer means, and a heating element, and for example, the liquid storage unit, the liquid transfer means, and the heating element may be included in the aerosol generation device 1 as separate modules.

[0044] The liquid storage unit can store a liquid composition. For example, the liquid composition can be a liquid containing a tobacco-containing substance including a volatile tobacco flavor component, or a liquid containing a non-tobacco substance. The liquid storage unit can be made to be detachable from or attached to the vaporizer 14, or can be made integral with the vaporizer 14.

[0045] For example, the liquid composition may include water, solvent, ethanol, plant extracts, fragrances, flavorings, or vitamin mixtures. The fragrances may include, but are not limited to, menthol, peppermint, spearmint oil, various fruit fragrance components, and the like. The flavorings may include components that can provide a variety of flavors or tastes to the user. The vitamin mixture may include, but is not limited to, at least one of vitamin A, vitamin B, vitamin C, and vitamin E. The liquid composition may also include an aerosol forming agent, such as glycerin and propylene glycol.

[0046] The liquid transfer means can transfer the liquid composition in the liquid storage portion to the heating element, for example, but not limited to, the liquid transfer means can be a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic.

[0047] The heating element is an element for heating the liquid composition transferred by the liquid transfer means. For example, the heating element can be, but is not limited to, a metal hot wire, a metal hot plate, a ceramic heater, etc. The heating element can also be configured with a conductive filament such as a nichrome wire, and can be arranged in a structure wound around the liquid transfer means. The heating element can be heated by supplying an electric current, and can transfer heat to the liquid composition in contact with the heating element, thereby heating the liquid composition. As a result, an aerosol is generated.

[0048] For example, the vaporizer 14 may also be referred to as, but is not limited to, a cartomizer or an atomizer.

[0049] Meanwhile, the aerosol generation device 1 may further include a general-purpose component in addition to the battery 11, the control unit 12, the heater 13, and the vaporizer 14. For example, the aerosol generation device 1 may include a display capable of outputting visual information, and / or a motor for outputting tactile information. The aerosol generation device 1 may also include at least one sensor (such as a puff detection sensor, a temperature detection sensor, or a cigarette insertion detection sensor). The aerosol generation device 1 may also be fabricated in a structure that allows external air to flow in and internal gas to flow out even when a cigarette 3 is inserted.

[0050] 1 to 3, the aerosol generation device 1 can also configure a system together with a separate cradle. For example, the cradle can also be used to charge the battery 11 of the aerosol generation device 1. Alternatively, the heater 13 may be heated in a state where the cradle and the aerosol generation device 1 are coupled together.

[0051] The cigarette 3 is similar to a typical combustion cigarette. For example, the cigarette 3 is divided into a tobacco rod 31 including a tobacco substance and an aerosol-generating substance, and a filter rod 32 including a filter or the like. Alternatively, the filter rod 32 of the cigarette 3 may also include an aerosol-generating substance. For example, the aerosol-generating substance made in the form of granules or capsules is also loaded into the second portion.

[0052] The entire tobacco rod 31 is inserted into the aerosol generation device 1, and the filter rod 32 is exposed to the outside. Alternatively, only a part of the tobacco rod 31 may be inserted into the aerosol generation device 1, or the entire tobacco rod 31 and a part of the filter rod 32 may be inserted. A user can inhale aerosol with the filter rod 32 held in the mouth. At this time, the aerosol is generated by the passage of outside air through the tobacco rod 31, and the generated aerosol passes through the filter rod 32 and is delivered to the user's mouth.

[0053] As an example, the external air may flow in through at least one air passage formed in the aerosol generation device 1. For example, the opening and closing of the air passage formed in the aerosol generation device 1 and / or the size of the air passage may be adjusted by the user. As a result, the amount of atomization, smoking sensation, etc. may be adjusted by the user. As another example, the external air may also flow in to the inside of the cigarette 3 through at least one hole formed in the surface of the cigarette 3.

[0054] An example of a cigarette will now be described with reference to FIG.

[0055] 4, the cigarette 3 includes a tobacco rod 31, a filter rod 32, and a front end plug 33. The tobacco rod 31 includes a tobacco material and an aerosol-forming material. The tobacco material may be tobacco.

[0056] The filter rod 32 may be adjacent to the rear end of the tobacco rod 31. The filter rod 32 may be configured with a single segment or multiple segments. For example, the filter rod 32 may include a first segment 321 that cools the aerosol and a second segment 322 that filters a predetermined component contained in the aerosol.

[0057] The front end plug 33 may be located on one side of the tobacco rod 31 facing the filter rod 32. The front end plug 33 may be adjacent to the front end of the tobacco rod 31. The front end plug 33 may prevent the tobacco rod 31 from falling out to the outside, and may prevent aerosol liquefied from the tobacco rod 31 during smoking from flowing into the aerosol generating device 1 (FIGS. 1 to 3).

[0058] The cigarette 3 is also wrapped by at least one trumpet 35. The trumpet 35 can cover and encase the cigarette 3. For example, the front end plug 33 may be wrapped by the first trumpet 351, the tobacco rod 31 may be wrapped by the second trumpet 352, the first segment 321 may be wrapped by the third trumpet 353, and the second segment 322 may be wrapped by the fourth trumpet 354. Then, the entire cigarette 3 may be rewrapped by the fifth trumpet 355. The fifth trumpet 355 is also an outer trumpet, and the first trumpet 351, the second trumpet 352, the third trumpet 353, and the fourth trumpet 354, which are covered and encased by the fifth trumpet 355, are also inner trumpets.

[0059] The cigarette 3 may have a diameter in the range of 5 mm to 9 mm and a length of about 48 mm, but is not limited thereto. For example, but not limited thereto, the front end plug 33 may have a length of about 7 mm, the tobacco rod 31 may have a length of about 15 mm, the first segment 321 may have a length of about 12 mm, and the second segment 322 may have a length of about 14 mm.

[0060] The tobacco rod 31 may include at least one of the aerosol generating materials, for example, but not limited to, glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The tobacco rod 31 may also include other additives, such as flavoring agents, humectants, and / or organic acids. A flavoring liquid, such as menthol or a humectant, may be added to the tobacco rod 31 by being sprayed onto the tobacco rod 31.

[0061] The tobacco rod 31 can be produced in various forms. For example, the tobacco rod 31 can be produced in a sheet or a strand. The tobacco rod 31 can also be produced in a cut tobacco obtained by finely shredding a tobacco sheet. The tobacco rod 31 can also be wrapped with a thermally conductive material. For example, the thermally conductive material can be a cellulose acetate filter. Meanwhile, the shape of the filter rod 32 is not limited. For example, the filter rod 32 can be a cylindrical rod or a tube-shaped rod having a hollow inside. The filter rod 32 can also be a recessed rod. If the filter rod 32 is composed of multiple segments, at least one of the multiple segments can be produced in a different shape.

[0062] Each segment of the filter rod 32 is described in detail below.

[0063] The first segment 321 of the filter rod 32 can cool the aerosol generated by the heater 13 heating the tobacco rod 31. Thus, the user can inhale the aerosol cooled to an appropriate temperature.

[0064] The length or diameter of the first segment 321 is determined in various ways depending on the shape of the cigarette 3. For example, the length of the first segment 321 is suitably within the range of 7 mm to 20 mm. Desirably, the length of the first segment 321 is about 14 mm, but is not limited thereto.

[0065] According to one embodiment, the first segment 321 of the filter rod 32 is also a cellulose acetate filter. For example, the first segment 321 is a tube-shaped structure having a hollow inside. When the heater 13 is inserted through the first segment 321, it is possible to prevent the inner material of the tobacco rod 210 from being pushed back, and also to generate a cooling effect of the aerosol. The diameter of the hollow included in the first segment 321 may be an appropriate diameter within the range of 2 mm to 4.5 mm, but is not limited thereto.

[0066] According to another embodiment, the first segment 321 is also produced by weaving polymer fibers. In this case, the scented liquid can be applied to the fibers produced by the polymer. Alternatively, the first segment 321 can be produced by weaving a separate fiber coated with the scented liquid and a fiber produced by the polymer together. Alternatively, the first segment 321 can be formed by a wound polymer sheet. This can increase the surface area in contact with the aerosol. Therefore, the aerosol cooling effect of the cooling structure 830 is further improved.

[0067] For example, the polymer may be made of a material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA) and aluminum foil.

[0068] Because the first segment 321 is formed from woven polymer fibers or wound polymer sheets, the first segment 321 may include one or more longitudinally extending channels, by which is meant a passageway through which a gas (e.g., air or aerosol) may pass.

[0069] Meanwhile, the first segment 321 may include a thread containing a volatile flavor component, which may be, but is not limited to, menthol. The second segment 322 of the filter rod 32 may be a cellulose acetate filter. The length of the second segment 322 may be suitably adopted within the range of 4 mm to 20 mm. For example, the length of the second segment 322 may be, but is not limited to, about 14 mm or about 12 mm.

[0070] The second segment 322 is also made of cellulose acetate. In the process of making the second segment 322, a flavoring liquid is sprayed onto the second segment 322 to produce a flavor. Alternatively, a separate fiber coated with a flavoring liquid can be inserted into the second segment 322. The aerosol generated in the tobacco rod 31 is cooled by passing through the first segment 321, and the cooled aerosol is delivered to the user via the second segment 322. Therefore, when a flavoring element is added to the second segment 322, the effect of enhancing the persistence of the flavor delivered to the user can be achieved.

[0071] The front end plug 33 may also be made of cellulose acetate. Optionally, the front end plug 33 may also include at least one channel, the cross-sectional shape of which may be varied.

[0072] The wrapper 35 will be described in detail below.

[0073] The first wrapper 351 may be a general filter wrapping paper to which a metal foil such as an aluminum foil is bonded. The second wrapper 352 and the third wrapper 353 may be made of a general filter wrapping paper. For example, the second wrapper 352 and the third wrapper 353 may be a porous wrapping paper or a non-porous wrapping paper.

[0074] FIG. 5 is a diagram illustrating a cigarette according to an embodiment in which perforations are formed.

[0075] At least one perforation 36 may be formed in the trumpet 35. Air outside the cigarette 3 may flow into the cigarette 3 through the perforation 36 formed in the trumpet 35.

[0076] The positions at which the perforations 36 are formed are also various. For example, the perforations 36 are also formed in the fifth trumpet 355. The air flowing in through the fifth trumpet 355 passes through the inner trumpet that the fifth trumpet 355 encloses, and flows into the cigarette 3.

[0077] Referring to Fig. 5(a), for example, the perforations 36 are also formed in the region surrounding the tobacco rod 31. Referring to Fig. 5(b), in another example, the perforations 36 are also formed in the region surrounding the filter rod 32. Specifically, the perforations 36 are also formed in the region surrounding the first segment 321. At this time, the air flowing in through the perforations 36 can cool the heated air passing through the tobacco rod 31 before it reaches the user's mouth, thereby cooling the surface of the filter rod 32.

[0078] The perforations 36 are also formed at positions spaced 12 mm to 24 mm, preferably 15 mm to 22 mm, forward from the rear end of the filter rod 32. For example, at least one perforation 36 is also formed at at least one of positions spaced approximately 15 mm, 20 mm, and 22 mm forward from the rear end of the filter rod 32.

[0079] Perforations 36 are also formed along the outer periphery of the trumpet 35, with the perforations 36 also being spaced apart at regular intervals along the outer periphery. The diameter of the perforations 36 may be 0.02 mm to 0.08 mm, for example 0.05 mm.

[0080] The perforations 36 are formed along the outer circumferential surface of the wrapper 35, thereby increasing the channels through which air can flow. Also, by forming one perforation 36 in the opposite direction to another perforation 36, air flow between one perforation 36 and the other perforation 36 through the inside of the cigarette 3 is facilitated. This reduces the resistance to drawing.

[0081] In addition, the air is allowed to flow in many directions through the perforations 36 formed along the outer circumferential surface of the trumpet 35, so that the air flow is balanced in many directions.

[0082] This allows the air circulation effect inside the cigarette 3 due to the air inflow to be equal in the circumferential direction of the wrapper 35. Therefore, cooling of the mainstream smoke is uniform at each point on the outer periphery of the wrapper 35.

[0083] The number of perforations 36 may vary. For example, three perforations 36 may be formed, or nine perforations 36 may be formed. In this case, the spacing between the perforations 36 may be constant or may have a constant pattern and be formed with different spacings.

[0084] FIG. 6 is a longitudinal cross-sectional view of a cigarette illustrating the flow of air through the cigarette according to one embodiment.

[0085] 6, the front end of the cigarette is provided with a front end plug, and perforations are also formed in the trumpet. For convenience, the perforations are shown to be formed in one area of ​​the trumpet opposite the first trumpet that encases the tobacco rod 31, but the contents described below also apply when the perforations are formed in other areas.

[0086] When a user smokes using the cigarette 3, air flows into the cigarette 3 through the front end plug 33, carries the generated aerosol through the tobacco rod 31, and reaches the user's mouth through the first segment 321 and the second segment 322 of the filter rod 32.

[0087] When a user puffs, the degree of resistance to airflow determines the amount of air inhaled during one puff, the time the air remains in the tobacco rod 31, the time the air remains in the first segment 321, the amount of aerosol contained in the air, etc. Therefore, the resistance to airflow is an important factor that must be taken into consideration when designing the cigarette 3.

[0088] Regarding the suction resistance, the front end plug and the perforations are in a complementary relationship. For example, the more the suction resistance is increased by the front end plug, the more the suction resistance is reduced by the formation of perforations. In another example, the more the suction resistance is reduced by the formation of perforations, the more the suction resistance is increased by the engagement of the front end plug.

[0089] Specifically, the front end plug 33 disposed at the front end of the cigarette 3 reduces the cross-sectional area of ​​air flow into the cigarette 3, thereby reducing the inflow of air and increasing the resistance to inhalation during smoking. The amount of resistance to inhalation reduced by the front end plug 33 also varies depending on the shape of the front end plug 33. For example, when the front end plug 33 is a hollow tube, the smaller the inner diameter, the greater the resistance to inhalation. Alternatively, the longer the length of the front end plug 33, the greater the resistance to inhalation.

[0090] On the other hand, when the user puffs, the air that flows into the cigarette 3 through the perforation 36 and the wrapper 35 can merge with the air that flows in through the front end plug 33 inside the cigarette 3 .

[0091] By forming the perforations 36 in the wrapper 35, air can flow in through the sides of the cigarette 3, increasing the air inflow and decreasing the resistance to draw.

[0092] The effect of reducing the suction resistance by the perforations 36 may vary depending on factors such as the number, shape, and size of the perforations 36. For example, the more the number of perforations 36, the more the suction resistance is reduced. Also, the larger the size of the perforations 36, the more the suction resistance is reduced.

[0093] On the other hand, the degree to which the front end plug 33 determined by the designed numerical values ​​affects the increase in the suction resistance is relatively greater than the degree to which the perforations 36 affect the reduction in the suction resistance.

[0094] FIG. 7 is a diagram illustrating the flow of air through a cigarette according to one embodiment.

[0095] 7, the front end of the cigarette 3 is provided with a front end plug 33, and perforations 36 are also formed in an area of ​​a wrapper 35 that encases the first segment 321. For example, perforations 36 are also formed in the fifth wrapper 355.

[0096] During puffing, air may flow through the perforations 36, the fifth bellows 355 and the first bellows 351, and into the first segment 321. The air flowing in through the perforations 36 may merge in the first segment 321 with the mainstream smoke that flows in through the front end plug 33, passes through the tobacco rod 31, and flows downstream.

[0097] Since the air flowing in through the perforations 36 is external air, whereas the mainstream smoke is in a heated state, the air flowing in through the perforations 36 has a lower temperature than the mainstream smoke. This cools the mainstream smoke. This allows the temperature of the mainstream smoke reaching the user's mouth and the surface temperature of the filter rod 32 in contact with the user's hand to be cooled to a safe temperature.

[0098] The perforations 36 are also formed at positions that are exposed to the outside of the aerosol generation device 1 when a portion of the cigarette 3 including the tobacco rod 31 is inserted into the aerosol generation device 1. When the cigarette is inserted into the aerosol generation device, the front end plug, the tobacco rod, and a portion of the filter rod are located inside the device, and another portion of the filter rod is exposed to the outside of the device. The perforations are shown to the outside by being located at the rear end of the external extension line A-A' of the device. Thus, outside air that is not heated by the heater flows in through the perforations 36, improving the cooling effect on the mainstream smoke.

[0099] As described above, the first segment 321 is configured to cool the mainstream smoke and has a hollow tube shape or is made of PLA material. If the first segment 321 is a tube type having an inner diameter larger than the inner diameter of the front end plug 33, the mainstream smoke diffuses into the first segment 321 through the front end plug 33. As the mainstream smoke diffuses, the deflection in the downstream direction is reduced, and the contact area and contact time between the external air flowing in through the perforations 36 and the diffused mainstream smoke are increased. This improves the cooling effect of the mainstream smoke.

[0100] As a result, as the mainstream smoke passes through the first segment 321, in addition to being cooled by the hollow shape or PLA material of the first segment 321, the cooling effect is further enhanced by the external air flowing into the perforations 36.

[0101] It goes without saying that the adjustment of suction resistance by the front end plug 33 and the perforation 36 as described through FIG. 6 can also be applied to the case in FIG. 7 in which the perforation 36 is formed in a region of the trumpet that covers the first segment 321.

[0102] 8 is a diagram showing points at which mainstream smoke temperature and cigarette surface temperature are measured in a cigarette according to an embodiment. Fig. 8(a) is a longitudinal cross-sectional view of the cigarette, and Fig. 8(b) is a perspective view of the cigarette. Perforation 36 may be located in an area of ​​the wrapper that encases first segment 321.

[0103] Table 1 shows data obtained by measuring the mainstream smoke and the surface temperature of the cigarette 3 in order to measure the cooling effect of the perforations 36. As shown in Fig. 8(a), the mainstream smoke temperature was measured in an area A1 where the first segment 321 and the second segment 322 are adjacent to each other and where the mainstream smoke passes through. As shown in Fig. 8(b), the surface temperature was measured in an area A2 at the center of the surface of the second segment 322.

[0104] Data measurements were taken for the cases where the first segment 321 was made in a tube shape with a hollow center, where the first segment 321 was made from PLA material, and where the first segment 321 was made from PLA material and perforations 36 were formed in the trumpet 35. [Table 1]

[0105] Referring to Table 1, when the first segment 321 is a PLA material filter, the mainstream smoke is cooled more than when it is a tubular filter, and when it is a PLA material filter with perforations 36 formed therein, the mainstream smoke cooling effect is the best.

[0106] It was found that such a cooling effect improves in the following order when comparing the surface temperatures of the cigarette 3: when the first segment 321 is a tubular filter, when it is a PLA material filter, and when it is a PLA material filter with perforations 36 formed therein.

[0107] It can be seen that the perforations 36 formed in the wrapper 35 that encases the first segment 321 improve the cooling effect of the mainstream smoke and the surface of the cigarette 3.

[0108] Those skilled in the art in the art to which the present invention relates will understand that the present invention may be embodied in modified forms without departing from the essential characteristics of the above description. Therefore, the disclosed method should be considered from an explanatory perspective, not a limiting one. The scope of the present invention is indicated in the claims, not the above description, and all differences within the scope of the equivalents should be interpreted as being included in the present invention.

Claims

1. a tobacco rod including a susceptor; a front end plug disposed at a front end of the tobacco rod; a filter rod including a plurality of segments disposed at a rear end of the tobacco rod; a wrapper surrounding the tobacco rod, the front end plug, and the filter rod; A plurality of perforations are formed in an area surrounding any one of the plurality of segments of the trumpet, Each of the plurality of segments is a tube-type filter including a hollow space, a separation distance between the plurality of perforations is constant; When a cigarette including the front end plug, the tobacco rod, and the filter rod is inserted into an aerosol generating device, one area in which the plurality of perforations are formed is exposed to the outside of the aerosol generating device, and outside air that is not heated inside the aerosol generating device flows in through the plurality of perforations.

2. 2. The cigarette of claim 1, wherein the resistance to draw of said front end plug is greater than the resistance to draw of each of said plurality of segments.

3. 3. The cigarette of claim 2, wherein said plurality of perforations reduces the resistance to draw increased by said front end plug.

4. The cigarette according to claim 1 , wherein each of the plurality of segments is a tubular filter having a different shape from the others.

5. The cigarette according to claim 1 , wherein each of the plurality of segments is a tubular filter including a different hollow space.

6. 2. The cigarette of claim 1, wherein the diameter of each of said plurality of perforations is between 0.02 mm and 0.08 mm.

7. The wrapper includes an inner wrapper and an outer wrapper that encases the inner wrapper, 2. The cigarette of claim 1, wherein said plurality of perforations are formed along an outer circumferential surface of said outer wrapper.

8. 2. The cigarette of claim 1, wherein said plurality of perforations are formed along a circumferential direction of said wrapper.

9. A housing having a storage space into which the cigarette according to any one of claims 1 to 8 is inserted; an induction coil for forming a magnetic field within the accommodation space; A control unit electrically connected to the induction coil and configured to control the supply of battery power to the induction coil.

10. An aerosol generating device having a first storage space into which the cigarette according to any one of claims 1 to 8 is inserted; and a cradle having a second accommodation space formed therein in which the aerosol generation device is accommodated.

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