KR102400620B1 - Cigarette and aerosol generating apparatus thereof - Google Patents

Abstract

According to one embodiment, the cigarette comprises a tobacco rod adjacent a first end of the tobacco rod, a first airflow transfer element having a first porosity, and a second end of the tobacco rod adjacent and greater than the first porosity. and a second airflow transfer element having a second porosity equal to or equal to, wherein the second porosity may be greater than or equal to 30%.

Description

Cigarette and aerosol generating apparatus thereof

One or more embodiments relate to cigarettes and aerosol-generating devices for cigarettes.

In recent years, there has been an increasing demand for alternative methods that overcome the disadvantages of conventional cigarettes. For example, there is an increasing demand for a method of generating an aerosol as the aerosol-generating material in the cigarette is heated rather than a method of burning a cigarette to produce an aerosol. Accordingly, research into a heated cigarette or a heated aerosol generating device is being actively conducted.

Republic of Korea Patent Publication No. 10-2014-0135173 Republic of Korea Patent Publication No. 10-2018-0111460

According to one embodiment, there may be provided a cigarette having a filter having a porosity greater than that of the filter positioned in the front rear.

According to one embodiment, the cigarette comprises a tobacco rod, adjacent a first end of the tobacco rod, a first airflow transfer element having a first porosity, and adjacent a second end of the tobacco rod, greater than or equal to the first porosity. and a second airflow transfer element having a second porosity, wherein the second porosity may be greater than or equal to 30%.

The first porosity may be 10% or more and 30% or less.

A ratio of the second porosity to the first porosity may be 1 or more and less than 3.

The second airflow transfer element may be in the form of a tube having an inner diameter defined by a hollow.

The ratio of the inner diameter to the outer diameter of the second airflow transmitting element may be at least 55%.

The inner diameter may be greater than or equal to 3.0 mm and less than or equal to 4.5 mm.

The first airflow directing element and the second airflow directing element may comprise cellulose acetate.

According to another embodiment, the aerosol generating device comprises a tobacco rod, a shear plug adjacent the front end of the tobacco rod and having a first porosity, and a filter adjacent to the trailing end of the tobacco rod and having a second porosity greater than or equal to the first porosity. A heating unit for heating the cigarette having a second porosity of 30% or more, a vaporizer for generating an aerosol by vaporizing the liquid composition, and a vaporizer for delivering the aerosol to the inside of the cigarette through a shear plug Operation of the heating unit and vaporizer It may include a control unit for controlling the.

According to one embodiment, the cigarette has a filter having a porosity greater than that of the filter positioned in the front is disposed in the rear, it is possible to cool the surface temperature of the mainstream smoke and the cigarette to a safe temperature.

1 is a perspective view of a drawing according to an embodiment;
2 is a perspective view of a cigarette according to another embodiment.
3 to 4 are views showing examples in which cigarettes are inserted into the aerosol generating device.
FIG. 5 is a cross-sectional view in the AA′ direction illustrating the flow of air passing through the cigarette of FIG. 1 .
6 is a cross-sectional view taken in a direction B-B' and a cross-sectional view in a direction C-C' of the cigarette of FIG. 1 .
7 is a view showing a point at which the temperature of mainstream smoke and the surface temperature of the cigarette in the cigarette according to an embodiment are measured.

The terms used in the embodiments are selected as currently widely used general terms as possible while considering functions in the present invention, which may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

In the entire specification, when a part "includes" a certain element, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, terms such as "unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software. there is.

Throughout the specification, "aerosol-generating article" may refer to a substance capable of generating an aerosol, such as cigarettes (cigarettes), cigars, and the like. The aerosol-generating article may comprise an aerosol-generating material or an aerosol-forming substrate. In addition, the aerosol-generating article may comprise solid materials based on tobacco raw materials, such as leaf tobacco, cut filler, reconstituted tobacco, and the like. Aerosols may contain volatile compounds.

Also, throughout the specification, "upstream" or "front" refers to a direction away from the mouth of a user smoking an aerosol-generating article and "downstream" or "rear" refers to a direction approaching the mouth of a user smoking an aerosol-generating article. it means.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

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

1 is a perspective view of a drawing according to an embodiment;

Referring to FIG. 1 , a cigarette 3 includes a tobacco rod 31 , a filter rod 32 and a shear plug 33 . The tobacco rod 31 comprises tobacco material and an aerosol generating material. The tobacco material may be tobacco.

The filter rod 32 may be adjacent the end of the tobacco rod 31 . For example, the filter rod 32 may be adjacent to the rear end of the tobacco rod 31 . The filter rod 32 may consist of a single segment or a plurality of segments. For example, the filter rod 32 may include a first segment 321 for cooling the aerosol and a second segment 322 for filtering certain components contained in the aerosol.

The shear plug 33 may be adjacent to the end of the tobacco rod 31 . For example, the front plug 33 may be located on one side of the tobacco rod 31 opposite to the filter rod 32 . The shear plug 33 may be adjacent to the front end of the tobacco rod 31 . The shear plug 33 can prevent the tobacco rod 31 from escaping to the outside, and the aerosol liquefied from the tobacco rod 31 during smoking flows into the aerosol generating device ( 1 in FIGS. 1 to 3 ). can be prevented

The cigarette 3 may be wrapped by at least one wrapper 35 . A wrapper 35 may surround the cigarette 3 .

The diameter of the cigarette 3 is within the range of 5 mm to 9 mm, and the length may be about 48 mm, but is not limited thereto. Tobacco rod 31 is, for example, an aerosol generating material glycerin, propylene glycol, ethylene glycol, di at least one of propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. In addition, the tobacco rod 31 may contain other additive substances such as flavoring agents, wetting agents and/or organic acids. In addition, a flavoring liquid such as menthol or a moisturizing agent can be added to the tobacco rod 31 by being sprayed onto the tobacco rod 31 .

Tobacco rod 31 may be manufactured in various ways. For example, the tobacco rod 31 may be manufactured as a sheet or as a strand. In addition, the tobacco rod 31 may be made of cut filler from which the tobacco sheet is chopped. In addition, the tobacco rod 31 may be surrounded by a heat-conducting material. For example, the heat-conducting material may be a cellulose acetate filter. On the other hand, the shape of the filter rod 32 is not limited. For example, the filter rod 32 may be a cylindrical rod, or a tubular rod including a hollow therein. Also, the filter rod 32 may be a recess type rod. If the filter rod 32 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.

Hereinafter, each segment of the filter rod 32 will be described in detail.

The first segment 321 of the filter rod 32 can cool the aerosol generated by the heating part 13 heating the tobacco rod 31 . Thus, the user can inhale the aerosol cooled to a suitable temperature.

The first segment 321 may be a filter that blocks predetermined components such as foreign substances in the process of passing the gas from the tobacco rod to the second segment 322 .

In addition, the first segment 321 may be an airflow transfer element that transfers the gas from the front end to the rear end thereof by providing a path for the gas discharged from the tobacco rod to travel.

The first segment 321 may include an empty space through which the gas may move.

The empty space may be a hollow or a polygonal cross-section, and may be a passage extending in the longitudinal direction. Alternatively, the empty space may be a plurality of small holes formed as the first segment 321 is made of a porous material.

The porosity of the first segment 321 may be variously determined by the empty space. The porosity may be a ratio of the area occupied by the empty space among the total cross-sectional area of the first segment 321 . It may be designed in consideration of the cooling effect of the airflow and the amount of nicotine transfer.

The empty space and the porosity may be designed in various shapes and numerical values, and embodiments thereof will be described in more detail later with reference to FIG. 6 .

The length or diameter of the first segment 321 may be variously determined according to the shape of the cigarette 3 . For example, the length of the first segment 321 may be appropriately employed within the range of 7 mm to 20 mm. Preferably, the length of the first segment 321 may be about 14 mm, but is not limited thereto.

According to one embodiment, the first segment 321 of the filter rod 32 may be a cellulose acetate filter. In addition, the first segment 321 may be manufactured by inserting a structure such as a film or a tube made of the same or different material inside (eg, hollow).

For example, the first segment 321 may be a tube-shaped structure including a hollow therein. When the heating unit 13 is inserted by the first segment 321, the inner material of the tobacco rod 210 may be prevented from being pushed back, and a cooling effect of the aerosol may be generated. 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.

According to another embodiment, the first segment 321 may be manufactured by weaving a polymer fiber. In this case, a fragrance liquid may be applied to the fibers made of the polymer. Alternatively, the first segment 321 may be manufactured by weaving a separate fiber to which the flavoring liquid is applied and a fiber made of a polymer together. Alternatively, the first segment 321 may be formed by a crimped polymer sheet. Thereby, the surface area in contact with the aerosol may be increased. Accordingly, the aerosol cooling effect of the cooling structure 830 may be further improved.

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

As the first segment 321 is formed by a woven polymer fiber or crimped polymer sheet, the first segment 321 may include a single or a plurality of channels extending in the longitudinal direction. Here, a channel means a passage through which a gas (eg, air or aerosol) passes.

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

In the process of manufacturing the second segment 322 , it may be manufactured so that flavor is generated by spraying a flavoring liquid to the second segment 322 . Alternatively, a separate fiber coated with a flavoring liquid may be inserted into the second segment 322 . The aerosol generated by the tobacco rod 31 is cooled as it passes through the first segment 321 , and the cooled aerosol is delivered to the user through the second segment 322 . Accordingly, when a flavoring element is added to the second segment 322 , the effect of enhancing the durability of the flavor delivered to the user may occur.

The front plug 33 may be an airflow transfer element that transfers gas from the front end to the rear end thereof by providing a path for the gas discharged from the tobacco rod to travel.

The front plug 33 may include an empty space through which the gas may move.

The empty space may be a hollow or a polygonal cross-section, and may be a passage extending in the longitudinal direction. Alternatively, the empty space may be a plurality of small holes formed as the shear plug 33 is made of a porous material.

The porosity of the shear plug 33 may be variously determined by the empty space. The porosity may be a ratio of the area occupied by the empty space among the total cross-sectional area of the front end plug 33 . It may be designed in consideration of the cooling effect of the airflow and the amount of nicotine transfer.

The empty space and the porosity may be designed in various shapes and numerical values, and embodiments thereof will be described in more detail later with reference to FIG. 6 .

The porosity of the shear plug 33 may be designed to be smaller than the porosity of the first segment 321 . Accordingly, the airflow that has passed through the front end plug 33 may expand while passing through the first segment 321 , thereby obtaining a cooling effect of the airflow and an effect of increasing the amount of nicotine transfer. This will be described later in more detail with reference to FIG. 5 .

The shear plug 33 may be made of cellulose acetate. In addition, if necessary, the shear plug 33 may include at least one channel, and the cross-sectional shape of the channel may be variously manufactured.

2 is a perspective view of a cigarette according to another embodiment.

The above-mentioned matters may be applied to the cigarette 3 described in FIG. 2 with reference to FIG. 1, and in FIG. 2, the cigarette 3 described in FIG.

The wrapper 35 may include a plurality of wrappers surrounding each segment.

For example, the shear plug 33 is wrapped by the first wrapper 351 , the tobacco rod 31 is wrapped by the second wrapper 352 , and the first segment ( 353 ) is wrapped by the third wrapper 353 . 321 may be wrapped, and the second segment 322 may be wrapped by the fourth wrapper 354 . In addition, the entire cigarette 3 may be repackaged by the fifth wrapper 355 .

The first wrapper 351 may be a general filter wrapper in which a metal foil such as aluminum foil is combined. The second wrapper 352 and the third wrapper 353 may be made of a general filter wrapper. For example, the second wrapper 352 and the third wrapper 353 may be a porous wrapper or a non-porous wrapper.

At least one perforation 36 may be formed in the wrapper 35 . Air outside the cigarette 3 may be introduced into the cigarette 3 through the perforations 36 formed in the wrapper 35 .

The location where the perforations 36 are formed may vary. For example, perforations 36 may be formed in fifth wrapper 355 . Air introduced through the fifth wrapper 355 may be introduced into the cigarette 3 through the inner wrapper wrapped by the fifth wrapper 355 .

As another example, the perforations 36 may be formed in the area surrounding the filter rod 32 . Specifically, the perforations 36 may be formed in the area surrounding the first segment 321 . At this time, the air introduced through the perforation 36 serves to cool the heated air and cool the filter rod 32 surface before the heated air passing through the tobacco rod 31 reaches the user's mouth. can be performed.

The number of perforations 36 may vary. For example, three perforations 36 may be formed, or nine perforations 36 may be formed. At this time, the spacing between the respective perforations 36 may be constant, or may be formed according to different spacing with a certain pattern.

3 to 4 are views showing examples in which cigarettes are inserted into the aerosol generating device.

Referring to FIG. 3 , the aerosol generating device 1 includes a battery 11 , a control unit 12 , and a heating unit 13 . Referring to FIG. 4 , the aerosol generating device 1 further comprises a vaporizer 14 . In addition, a cigarette 3 may be inserted into the inner space of the aerosol generating device 1 .

The aerosol generating device 1 shown in FIGS. 3 to 4 shows the components related to the present embodiment. Therefore, it can be understood by those of ordinary skill in the art related to this embodiment that other general-purpose components other than those shown in FIGS. 3 to 4 may be further included in the aerosol generating device 1 . .

In addition, although FIG. 4 shows that the heating unit 13 is included in the aerosol generating device 1 , the heating unit 13 may be omitted if necessary.

3, the battery 11, the control unit 12, and the heating unit 13 are shown to be arranged in a line. 4, the battery 11, the control unit 12, the vaporizer 14, and the heating unit 13 are shown as being arranged in a line. However, the internal structure of the aerosol generating device 1 is not limited to that shown in FIGS. 3 to 4 . In other words, depending on the design of the aerosol generating device 1 , the arrangement of the battery 11 , the control unit 12 , the heating unit 13 and the vaporizer 14 may be arranged in parallel or changed to another arrangement form. there is.

When the cigarette 3 is inserted into the aerosol-generating device 1 , the aerosol-generating device 1 can actuate the heating element 13 and/or the vaporizer 14 to generate an aerosol. The aerosol generated by the heating element 13 and/or the vaporizer 14 passes through the cigarette 3 and is delivered to the user.

If necessary, the aerosol-generating device 1 can heat the heating unit 13 even when the cigarette 3 is not inserted into the aerosol-generating device 1 .

The battery 11 supplies the power used to operate the aerosol generating device 1 . For example, the battery 11 may supply power to the heating unit 13 or the vaporizer 14 to be heated, and may supply power required for the control unit 12 to operate. In addition, the battery 11 may supply power required to operate a display, a sensor, a motor, etc. installed in the aerosol generating device 1 .

The control unit 12 controls the overall operation of the aerosol generating device 1 . Specifically, the control unit 12 controls the operation of the battery 11 , the heating unit 13 and the vaporizer 14 , as well as other components included in the aerosol generating device 1 . Also, the control unit 12 may determine whether the aerosol generating device 1 is in an operable state by checking the state of each of the components of the aerosol generating device 1 .

The control unit 12 includes at least one processor. The processor may be implemented as an array of a plurality of logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program executable in the microprocessor is stored. In addition, it can be understood by those skilled in the art that the present embodiment may be implemented in other types of hardware.

The heating unit 13 may be heated by electric power supplied from the battery 11 . For example, if the cigarette 3 is inserted into the aerosol generating device 1 , the heating element 13 may be located outside the cigarette 3 . Thus, the heated heating element 13 can raise the temperature of the aerosol generating material in the cigarette 3 .

The heating unit 13 may be an electrically resistive heater. For example, the heating unit 13 may include an electrically conductive track, and the heating unit 13 may be heated as current flows through the electrically conductive track. However, the heating unit 13 is not limited to the above-described example, and may be applicable without limitation as long as it 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 the user.

Meanwhile, as another example, the heating unit 13 may be an induction heating type heater. Specifically, the heating unit 13 may include an electrically conductive coil for heating the cigarette 3 by an induction heating method, and the cigarette 3 may include a susceptor that can be heated by an induction heating type heater. there is.

For example, the heating unit 13 may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, inside or outside the cigarette 3 depending on the shape of the heating element. can be heated.

In addition, a plurality of heating units 13 may be disposed in the aerosol generating device 1 . In this case, the plurality of heating units 13 may be disposed to be inserted into the cigarette 3 , or may be disposed outside the cigarette 3 . In addition, some of the plurality of heating units 13 may be disposed to be inserted into the cigarette 3 , and the rest may be disposed outside the cigarette 3 . In addition, the shape of the heating unit 13 is not limited to the shape shown in FIGS. 3 to 4 , and may be manufactured in various shapes.

Referring to FIG. 4 , the aerosol generating device may further include a vaporizer 14 .

Vaporizer 14 may heat the liquid composition to generate an aerosol, which may be delivered to a user through cigarette 3 . In other words, the aerosol generated by the vaporizer 14 may travel along an airflow passage of the aerosol generating device 1 , wherein the aerosol generated by the vaporizer 14 passes through the cigarette 3 . It may be configured to be delivered to a user.

For example, the vaporizer 14 may include, but is not limited to, a liquid reservoir, a liquid delivery means and a heating element. For example, the liquid reservoir, the liquid delivery means and the heating element may be included in the aerosol-generating device 1 as independent modules.

The liquid reservoir may store the liquid composition. For example, the liquid composition may be a liquid comprising a tobacco-containing material comprising a volatile tobacco flavor component, or may be a liquid comprising a non-tobacco material. The liquid storage unit may be manufactured to be detachably/attached from the vaporizer 14 , or may be manufactured integrally with the vaporizer 14 .

For example, the liquid composition may include water, a solvent, ethanol, a plant extract, a flavoring, flavoring agent, or a vitamin mixture. The fragrance may include, but is not limited to, menthol, peppermint, spearmint oil, various fruit flavoring ingredients, and the like. Flavoring agents may include ingredients capable of providing a user with a variety of flavors or flavors. The vitamin mixture may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto. Liquid compositions may also include aerosol formers such as glycerin and propylene glycol.

The liquid delivery means may deliver the liquid composition of the liquid reservoir to the heating element. For example, the liquid delivery means may be, but is not limited to, a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic.

The heating element is an element for heating the liquid composition delivered by the liquid delivery means. For example, the heating element may be, but is not limited to, a metal heating wire, a metal heating plate, a ceramic heater, or the like. In addition, the heating element may be composed of a conductive filament, such as a nichrome wire, and may be arranged to be wound around the liquid delivery means. The heating element may be heated by supplying an electrical current, and may transfer heat to the liquid composition in contact with the heating element, thereby heating the liquid composition. As a result, an aerosol may be generated.

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

Meanwhile, the aerosol generating device 1 may further include general-purpose components in addition to the battery 11 , the control unit 12 , the heating unit 13 , and the vaporizer 14 . For example, the aerosol generating device 1 may include a display capable of outputting visual information and/or a motor for outputting tactile information. In addition, the aerosol generating device 1 may comprise at least one sensor. In addition, the aerosol generating device 1 may be manufactured to have a structure in which external air can be introduced or internal gas can flow out even in a state in which the cigarette 3 is inserted.

Although not shown in FIGS. 3 to 4 , the aerosol generating device 1 may constitute a system together with a separate cradle. For example, the cradle may be used for charging the battery 11 of the aerosol generating device 1 . Alternatively, the heating unit 13 may be heated in a state in which the cradle and the aerosol generating device 1 are combined.

The cigarette 3 may be similar to a general burning cigarette. For example, the cigarette 3 may be divided into a tobacco rod 31 including tobacco material and an aerosol generating material, and a filter rod 32 including a filter and the like. Alternatively, the tobacco rod 32 of the cigarette 3 may also contain an aerosol generating material. For example, an aerosol generating material made in the form of granules or capsules may be inserted into the filter rod 32 .

The entire tobacco rod 31 is inserted into the aerosol generating device 1, and the filter rod 32 may be exposed to the outside. Alternatively, only a portion of the tobacco rod 31 may be inserted into the aerosol generating device 1 , and the entire tobacco rod 31 and a part of the filter rod 32 may be inserted. The user may inhale the aerosol while holding the filter rod 32 with the mouth. At this time, the aerosol is generated by the external air passing through the tobacco rod 31, the generated aerosol is passed through the filter rod 32 is delivered to the user's mouth.

As an example, external air may be introduced through at least one air passage formed in the aerosol generating device 1 . For example, the opening and closing of the air passage and/or the size of the air passage formed in the aerosol generating device 1 may be adjusted by the user. Accordingly, the amount of atomization, the feeling of smoking, and the like can be adjusted by the user. As another example, external air may be introduced into the interior of the cigarette 3 through at least one hole formed in the surface of the cigarette (3).

FIG. 5 is a cross-sectional view in the direction A-A' showing the flow of air passing through the cigarette of FIG. 1 .

Referring to FIG. 5 , when the user smokes using the cigarette 3 , air flows into the cigarette 3 through the shear plug 33 , and then carries the aerosol generated while passing through the cigarette rod 31 . Thus, it can pass through the first segment 321 and the second segment 322 of the filter rod 32 to reach the user's mouth.

The porosity of the first segment 321 is designed to be larger than the porosity of the shear plug 33 . Accordingly, as the gas including air and mainstream smoke passes through the shear plug 33 and enters the first segment 321 , the gas may instantaneously expand in volume. Thereby, the gas can be cooled while expanding. Also, while entering the first segment 321 , the gas may diffuse in the radial direction of the cigarette 3 . At this time, as the deflection of the airflow toward the rear is reduced, the time for the gas to stay in the first segment 321 may be increased, and the cooling effect may be improved.

As the difference in porosity between the front plug 33 and the first segment 321 increases, the cooling effect of the gas may be improved. In other words, as the porosity of the first segment 321 increases, the cooling effect of the gas may be improved.

For example, when the first segment 321 has a tubular shape including a hollow, as the inner diameter increases, the porosity increases, so that the cooling effect of the gas may be improved. When the front plug 33 is tubular, the cooling effect of the gas may be improved as the inner diameter of the first segment 321 is larger than the inner diameter of the front plug 33 .

In addition, the porosity of the shear plug 33 and the first segment 321 may affect the resistance to aspiration of the airflow and the amount of nicotine transfer carried by the airflow. As the porosity of the first segment 321 increases, the amount of introduced air may increase, and the suction resistance may decrease. Accordingly, the amount of transfer of the aerosol including nicotine generated from the tobacco rod may increase.

Accordingly, the porosity and inner diameter values of the shear plug 33 and the first segment 321 may be determined in consideration of suction resistance, aerosol delivery amount, and cooling effect of the gas.

6 is a cross-sectional view taken in a direction B-B' and a cross-sectional view in a direction C-C' of the cigarette of FIG. 1 . The cross-section of FIG. 6 is only an example of the cross-section of the cigarette 3, and is not limited thereto.

6( a ) is a cross-sectional view in the B-B' direction of the cigarette 3 . Referring to FIG. 6A , the cross section of the cigarette 3 may include an empty space in which a plurality of slit-type or bar-type empty spaces are combined. The cross-section of FIG. 6( a ) may be a cross-section of the shear plug 33 .

For example, the empty space may be a Y-type in which three slit-shaped or bar-shaped empty spaces having different extension directions are combined.

The porosity of the cross section of the cigarette 3 may be different according to the number, thickness, and length of the slit-type or rod-type empty space. For example, the overall cross-sectional area of the cigarette 3 may be 38.5 mm ² , and the cross-sectional area of the empty space may be 10.89 mm ² . At this time, the porosity of the cigarette 3 may be 28.3%.

As another example, the overall cross-sectional area of the cigarette 3 may be 38.5 mm ² , and the cross-sectional area of the empty space may be 8.21 mm ² . At this time, the porosity of the cross section of the cigarette 3 may be 21.3%. As another example, the overall cross-sectional area of the cigarette 3 may be 38.5 mm ² , and the cross-sectional area of the empty space may be 5.75 mm ² . At this time, the porosity of the cross section of the cigarette 3 may be 14.9%. That is, according to Figure 6 (a), the porosity of the cross section of the cigarette (3) may be less than 10% to 30%.

The cross section of Figure 6 (a) is only an example of the cross section of the cigarette (3), but is not limited thereto. For example, the cross-section of the cigarette 3 may be provided with one, two, or four or more slit-shaped or rod-shaped empty spaces. In this case, as the number of slit-type or rod-type empty spaces increases, the porosity may increase.

6(b) is a cross-sectional view in the direction C-C' of the cigarette 3 . Referring to Figure 6 (b), the cross section of the cigarette (3) may be a hollow tubular form. 6( b ) may be, for example, a cross-section of the first segment 321 .

The inner diameter of the hollow may be designed to a numerical value to provide a predetermined porosity. As the inner diameter of the hollow increases, the porosity may increase, and as the inner diameter of the hollow decreases, the porosity may decrease.

For example, the overall diameter of the cigarette 3 may be within the range of 5 mm to 9 mm, specifically, the diameter of the cigarette 3 may be 7 mm to 7.4 mm.

At this time, the inner diameter of the hollow may be 3.0 mm or more and 4.5 mm or less. Preferably, the inner diameter of the hollow may be 3.8 mm or more. More preferably, the inner diameter of the hollow may be 4.0 mm or more.

Accordingly, the inner diameter of the hollow compared to the total diameter of the cigarette (3) may be 50% or more. Specifically, the inner diameter of the hollow compared to the total diameter of the cigarette (3) may be 55% or more.

On the other hand, the overall cross-sectional area of the cigarette (3) is 38.5 mm ² , the cross-sectional area of the empty space due to the hollow may be 13.85 mm ² . At this time, the porosity of the cross section of the cigarette 3 may be 30% or more. Specifically, the porosity of the cross section of the cigarette 3 may be 36.0%.

As described above with reference to FIGS. 6( a ) and 6 ( b ), the porosity of the cross-section of the cigarette 3 may be designed differently depending on the cross-sectional shape of the cigarette 3 . For example, the first segment 321 may have a hollow cross-section having a porosity of 30% or more as shown in FIG. It may have a cross section comprising a Y-shaped void having a porosity of less than. In other words, the ratio of the porosity of the first segment 321 to the porosity of the front end plug 33 may be 1 or more and less than 3.

7 is a view showing a point at which the temperature of the mainstream smoke and the surface temperature of the cigarette in the cigarette according to an embodiment are measured. 7 (a) is a longitudinal cross-sectional view of the cigarette (3), Figure 7 (b) is a perspective view of the cigarette (3). The perforations 36 may be located in an area of the wrapper surrounding the first segment 321 .

Table 1 is data obtained by measuring the mainstream smoking temperature of the cigarette 3, the surface temperature of the cigarette 3, and the amount of nicotine transfer by varying the ratio of the porosity of the first segment 321 to the porosity of the shear plug 33. As shown in FIG. 7A , the temperature of the mainstream smoke was measured in an area A1 where the first segment 321 and the second segment 322 were adjacent and the mainstream smoke passes. Mainstream smoke temperature may be measured via a temperature sensor. As shown in FIG. 7B , the surface temperature was measured in an area A2 at the center of the surface of the second segment 322 . The surface temperature can be measured through thermal imaging analysis.

division Experimental Example #1 Experimental Example #2 Experimental Example #3 First segment porosity (%) 12.8 23.6 36.0 Shear plug porosity (%) 28.3 Cigarette surface temperature (°C) 50.0 53.0 53.0 Mainstream Smoke Temperature (°C) 62.0 58.6 56.2 Nicotine transition amount (mg/cigarette) 0.60 0.66 0.71

The cross-sectional area of void space of the shear plug 33 is 10.89, and the porosity is 28.3%. In each experimental example, the cross-sectional area of void space of the shear plug 33 is 10.89 mm 2 , and thus the porosity of the cross-section of the shear plug 33 is 28.3 % is maintained.

In the first experimental example, the first segment 321 may be in the form of a tube including a hollow, and the outer diameter of the first segment 321 may be 7 mm to 7.4 mm. The inner diameter of the first segment 321 is 2.5 mm. The ratio of the inner diameter to the outer diameter of the first segment 321 is 34%. The cross-sectional area of the empty space of the first segment 321 is 4.91 mm 2 , and thus the porosity of the cross-section of the first segment 321 is 12.8%.

In the second experimental example, the inner diameter of the first segment 321 is 3.4 mm. The ratio of the inner diameter to the outer diameter of the first segment 321 is 46%. The cross-sectional area of the empty space of the first segment 321 is 9.07 mm 2 , and thus the porosity of the cross-section of the first segment 321 is 23.6%.

In the third experimental example, the inner diameter of the first segment 321 is 4.2 mm. The ratio of the inner diameter to the outer diameter of the first segment 321 is 56%. The cross-sectional area of the empty space of the first segment 321 is 13.85 mm 2 , and thus the porosity of the cross-section of the first segment 321 is 36.0%.

Referring to Table 1, as described above with reference to FIG. 5, it can be seen that the higher the porosity of the first segment 321, the lower the surface temperature of the cigarette 3 and the main smoke temperature, and the amount of nicotine transfer increases.

In particular, when the porosity of the shear plug 33 is less than 30% and the porosity of the first segment 321 is 30% or more, the mainstream smoke temperature is as low as 56.2 degrees, and the nicotine transfer amount can be secured as high as 0.71 mg/cigarette.

A person of ordinary skill in the art related to this embodiment will understand that it can be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

1 Aerosol-generating device
3 cigarettes
31 Tobacco Road
32 filter load
33 shear plug

Claims (8)

tobacco load;
a first airflow transfer element adjacent the front end of the tobacco rod and having a first porosity; and
a second airflow transfer element adjacent the trailing end of the tobacco rod and having a second porosity greater than the first porosity;
The second porosity is 30% or more,
cigarette. According to claim 1,
The first porosity is 10% or more and 30% or less,
cigarette. According to claim 1,
The ratio of the second porosity to the first porosity is 1 or more and less than 3,
cigarette. According to claim 1,
The second airflow transfer element is in the form of a tube having an inner diameter formed by a hollow.
cigarette. 5. The method of claim 4,
a ratio of the inner diameter to the outer diameter of the second airflow transfer element is at least 55%;
cigarette. 5. The method of claim 4,
The inner diameter is greater than or equal to 3.0 mm and less than or equal to 4.5 mm,
cigarette. According to claim 1,
wherein the first airflow transfer element and the second airflow transfer element comprise cellulose acetate.
cigarette. a tobacco rod, a front end plug adjacent to the front end of the tobacco rod and having a first porosity, and a filter rod adjacent to the rear end of the tobacco rod, the filter rod having a second porosity greater than the first porosity, wherein the second porosity is Heating unit for heating 30% or more of the cigarette;
a vaporizer that vaporizes the liquid composition to produce an aerosol and delivers the aerosol through the shear plug into the interior of the cigarette; and
Containing a control unit for controlling the operation of the heating unit and the vaporizer,
aerosol generating device.

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