Cartridge and aerosol-generating device

Abstract

A cartridge, according to an embodiment of the present invention, comprises: a container part that accommodates a liquid composition that generates aerosol when heated; and a water-repellent coating layer formed on the inner surface of the container part, wherein the coating layer may have a plurality of micro-scale protrusions protruding in the inward direction of the container part.

Description

Cartridges and aerosol generating devices

[0001] Embodiments of the present invention relate to cartridges and aerosol generating devices.

[0002] Recently, there has been a growing demand for technologies that replace the conventional method of producing aerosols by burning cigarettes. For example, research is underway into methods for producing aerosols from liquid or solid aerosol-generating substances, or for producing vapor from liquid aerosol-generating substances and then passing the vapor through a solid flavoring medium to produce a flavored aerosol.

[0003] Recently, aerosol generating devices capable of generating aerosol by heating an aerosol-generating material have been proposed as an alternative to the method of supplying aerosol by burning cigarettes. For example, an aerosol generating device may refer to a device capable of generating aerosol by heating a liquid or solid aerosol-generating material to a predetermined temperature via a heater.

[0004] Research on aerosol generating devices has been increasing in recent years because they can improve the convenience of smoking for users, such as allowing smoking without additional accessories such as lighters and allowing users to smoke as much as they want.

[0005] The cartridge storing the liquid composition of the aerosol generating device has residual liquid composition remaining inside even after use.

[0006] These liquid compositions have a high viscosity, making them difficult to discharge through physical means.

[0007] Additionally, these residual liquid compositions may result in frequent cartridge replacements.

[0008] The technical problem to be achieved by the present invention is to provide a cartridge and an aerosol generating device capable of minimizing the residual liquid composition in the cartridge.

[0009] A cartridge according to an embodiment comprises a container portion for accommodating a liquid composition that generates an aerosol when heated; and a water-repellent coating layer formed along an inner surface of the container portion, wherein the coating layer may have a plurality of micro-scale protrusions formed in an inner direction of the container portion.

[0010] The coating layer may include a base layer arranged along the inner surface of the container portion and having protrusions formed on the surface in the direction of the inner surface of the container portion; and a liquid layer arranged between the protrusions of the base layer.

[0011] The above liquid layer can support a liquid phase accommodated in the container.

[0012] The above liquid layer may have an immiscible property with respect to the liquid composition contained in the container.

[0013] The above liquid layer may have immiscible properties with respect to propylene glycol (PG) and vegetable glycerin.

[0014] The superhydrophobic properties may vary depending on the distance between the heater that heats the liquid composition and the coating layer.

[0015] As the distance from the heater increases, the above-described ultra-small-sized properties can be enhanced.

[0016] An aerosol generating device according to another embodiment comprises: a battery for supplying power used to operate the aerosol generating device; a control unit including at least one processor; and a cartridge, wherein the cartridge may include a container portion for accommodating a liquid composition that generates an aerosol when heated, and a coating layer having superhydrophobic properties formed along an inner surface of the container portion.

[0017] The cartridge and aerosol generating device according to the embodiment can enable the liquid composition to be easily discharged through chemical coating treatment of the inner surface of the liquid cartridge.

[0018] Additionally, it is possible to prevent a liquid composition having a high viscosity from being impregnated into the inner surface of the container.

[0019] In addition, frequent replacement of the cartridge can be prevented by ensuring that the liquid composition contained in the cartridge is used to the maximum extent possible.

[0020] FIGS. 1 and 2 are drawings illustrating examples of cigarettes inserted into an aerosol generating device according to one embodiment of the present invention.

[0021] Figures 3 and 4 are drawings illustrating examples of cigarettes according to one embodiment.

[0022] Figure 5 is a block diagram of an aerosol generating device according to another embodiment.

[0023] Figure 6 is a drawing for explaining a cartridge according to an embodiment.

[0024] Fig. 7 is a drawing for explaining a coating layer according to an embodiment.

[0025] Figures 8 and 9 are drawings for explaining a coating layer according to another embodiment.

[0026] Figures 10 to 15 are drawings for explaining a coating layer according to another embodiment.

[0027] The terms used in the examples are selected from widely used, current terms, taking into account the functions of the present invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, the applicant may arbitrarily select terms, and in such cases, their meanings will be described in detail in the description of the relevant invention. Therefore, the terms used in the present invention should be defined not simply based on their names, but based on their meanings and the overall content of the present invention.

[0028] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part" and "module" used in the specification mean a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0029] Below, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0031] Figures 1 and 2 are drawings showing examples of cigarettes inserted into an aerosol generating device.

[0032] Referring to Fig. 1, an aerosol generating device (1) includes a battery (11), a control unit (12), a heater (13), and a vaporizer (14). A cigarette (2) can be inserted into the internal space of the aerosol generating device (1).

[0033] The aerosol generating device (1) illustrated in FIGS. 1 and 2 illustrates components related to the present embodiment. Accordingly, a person skilled in the art related to the present embodiment will understand that, in addition to the components illustrated in FIGS. 1 and 2, the aerosol generating device (1) may further include other general-purpose components.

[0034] In addition, although FIGS. 1 and 2 illustrate that the aerosol generating device (1) includes a heater (13), the heater (13) may be omitted if necessary.

[0035] In Fig. 1, a battery (11), a control unit (12), a vaporizer (14), and a heater (13) are illustrated as being arranged in a row. In addition, in Fig. 2, 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 and 2. In other words, depending on the design of the aerosol generating device (1), the arrangement of the battery (11), the control unit (12), the heater (13), and the vaporizer (14) may be changed.

[0036] When a cigarette (2) is inserted into an aerosol generating device (1), the aerosol generating device (1) can generate an aerosol by operating a heater (13) and / or a vaporizer (14). The aerosol generated by the heater (13) and / or the vaporizer (14) passes through the cigarette (2) and is delivered to the user.

[0037] If necessary, the aerosol generating device (1) can heat the heater (13) even when the cigarette (2) is not inserted into the aerosol generating device (1).

[0038] The battery (11) supplies power used to operate the aerosol generating device (1). For example, the battery (11) can supply power to heat the heater (13) or the vaporizer (14), and can supply power required for the control unit (12) to operate. In addition, the battery (11) can supply power required for the operation of the display, sensor, motor, etc. installed in the aerosol generating device (1).

[0039] 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), heater (13), and vaporizer (14) as well as other components included in the aerosol generating device (1). In addition, the control unit (12) can also check the status of each component of the aerosol generating device (1) to determine whether the aerosol generating device (1) is in an operable state.

[0040] The control unit (12) includes at least one processor. The processor may be implemented as an array of multiple logic gates, or as a combination of a general-purpose microprocessor and a memory storing a program executable on the microprocessor. Furthermore, those skilled in the art will appreciate that the processor may be implemented using other types of hardware.

[0041] The heater (13) can be heated by power supplied from the battery (11). For example, when a cigarette is inserted into the aerosol generating device (1), the heater (13) can be located outside the cigarette. Accordingly, the heated heater (13) can increase the temperature of the aerosol generating material inside the cigarette.

[0042] The heater (13) may be an electrically resistive heater. For example, the heater (13) may include an electrically conductive track, and the heater (13) may be heated as current flows through the electrically conductive track. However, the heater (13) is not limited to the above-described example, and any heater capable of heating to a desired temperature may be used without limitation. Here, the desired temperature may be preset in the aerosol generating device (1), or may be set to a desired temperature by the user.

[0043] 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 a cigarette in an induction heating manner, and the cigarette may include a susceptor that can be heated by the induction heating heater.

[0044] For example, the heater (13) may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, and may heat the inside or outside of the cigarette (2) depending on the shape of the heating element.

[0045] In addition, a plurality of heaters (13) may be arranged in the aerosol generating device (1). At this time, the plurality of heaters (13) may be arranged to be inserted into the interior of the cigarette (2) or may be arranged on the exterior of the cigarette (2). In addition, some of the plurality of heaters (13) may be arranged to be inserted into the interior of the cigarette (2), and the rest may be arranged on the exterior of the cigarette (2). In addition, the shape of the heater (13) is not limited to the shape illustrated in FIGS. 1 to 3, and may be manufactured in various shapes.

[0046] The vaporizer (14) can heat the liquid composition to generate an aerosol, and the generated aerosol can be delivered to the user through the cigarette (2). In other words, the aerosol generated by the vaporizer (14) can travel along the airflow path of the aerosol generating device (1), and the airflow path can be configured so that the aerosol generated by the vaporizer (14) can pass through the cigarette and be delivered to the user.

[0047] For example, the vaporizer (14) may include, but is not limited to, a liquid storage unit, a liquid delivery means, and a heating element. For example, the liquid storage unit, the liquid delivery means, and the heating element may be included in the aerosol generating device (1) as independent modules.

[0048] The liquid storage unit can store a liquid composition. For example, the liquid composition can be a liquid containing a tobacco-containing substance including volatile tobacco flavoring components, or a liquid containing a non-tobacco substance. The liquid storage unit can be designed to be detachable from / attached to the vaporizer (14), or can be designed as an integral part of the vaporizer (14).

[0049] For example, the liquid composition may include water, a solvent, ethanol, a plant extract, a fragrance, a flavoring agent, or a vitamin mixture. The flavoring agent may include, but is not limited to, menthol, peppermint oil, spearmint oil, various fruit-flavored ingredients, and the like. The flavoring agent may include ingredients that can provide a variety of flavors or tastes to the user. The vitamin mixture may include, but is not limited to, a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E. Additionally, the liquid composition may include an aerosol-forming agent such as glycerin and propylene glycol.

[0050] The liquid delivery means can deliver the liquid composition from the liquid storage to the heating element. For example, the liquid delivery means can be, but is not limited to, a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic.

[0051] A heating element is an element for heating a liquid composition delivered by a 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, etc. In addition, the heating element may be composed of a conductive filament, such as a nichrome wire, and may be arranged in a structure that is wound around the liquid delivery means. The heating element may be heated by a current supply 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.

[0052] For example, the vaporizer (14) may be referred to as a cartomizer or an atomizer, but is not limited thereto.

[0053] Meanwhile, the aerosol generating device (1) may further include general-purpose components in addition to the battery (11), the control unit (12), the heater (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 include at least one sensor (a puff detection sensor, a temperature detection sensor, a cigarette insertion detection sensor, etc.). In addition, the aerosol generating device (1) may be manufactured in a structure in which external air may be introduced or internal gas may be discharged even when the cigarette (2) is inserted.

[0054] Although not illustrated in FIGS. 1 and 2, the aerosol generating device (1) may also be configured as a system with a separate cradle. For example, the cradle may be used to charge the battery (11) of the aerosol generating device (1). Alternatively, the heater (13) may be heated while the cradle and the aerosol generating device (1) are combined.

[0055] The cigarette (2) may be similar to a typical combustible cigarette. For example, the cigarette (2) may be divided into a first portion containing an aerosol-generating substance and a second portion containing a filter or the like. Alternatively, the second portion of the cigarette (2) may also contain an aerosol-generating substance. For example, an aerosol-generating substance in the form of granules or capsules may be inserted into the second portion.

[0056] The entire first part may be inserted into the aerosol generating device (1), and the second part may be exposed to the outside. Alternatively, only a portion of the first part may be inserted into the aerosol generating device (1), or the entire first part and a portion of the second part may be inserted. The user may inhale the aerosol while holding the second part in his or her mouth. At this time, the aerosol is generated by external air passing through the first part, and the generated aerosol passes through the second part and is delivered to the user's mouth.

[0057] As an example, outside air can be introduced through at least one air passage formed in the aerosol generating device (1). For example, the opening and / or closing of the air passage formed in the aerosol generating device (1) and / or the size of the air passage can be controlled by the user. Accordingly, the amount of vapor, the smoking sensation, etc. can be controlled by the user. As another example, outside air can also be introduced into the interior of the cigarette (2) through at least one hole formed on the surface of the cigarette (2).

[0058] Hereinafter, examples of cigarettes (2) will be described with reference to FIGS. 3 and 4.

[0059] Figures 3 and 4 are drawings showing examples of cigarettes.

[0060] Referring to FIG. 3, the cigarette (2) includes a tobacco rod (21) and a filter rod (22). The first part (21) described above with reference to FIGS. 1 to 3 includes the tobacco rod (21), and the second part (22) includes the filter rod (22).

[0061] Although the filter rod (22) is illustrated as a single segment in FIG. 3, this is not limiting. In other words, the filter rod (22) may be composed of multiple segments. For example, the filter rod (22) may include a segment for cooling the aerosol and a segment for filtering a predetermined component contained within the aerosol. In addition, the filter rod (22) may further include at least one segment that performs a different function, if necessary.

[0062] The diameter of the cigarette (2) is within the range of 5 mm to 9 mm, and the length may be about 48 mm, but is not limited thereto. For example, the length of the tobacco rod (21) may be about 12 mm, the length of the first segment of the filter rod (22) may be about 10 mm, the length of the second segment of the filter rod (22) may be about 14 mm, and the length of the third segment of the filter rod (22) may be about 12 mm, but is not limited thereto.

[0063] A cigarette (2) may be wrapped by at least one wrapper (24). The wrapper (24) may have at least one hole formed therein through which outside air is introduced or internal gas is discharged. As an example, the cigarette (2) may be wrapped by one wrapper (24). As another example, the cigarette (2) may be wrapped by two or more wrappers (24) in an overlapping manner. For example, the tobacco rod (21) may be wrapped by a first wrapper (241), and the filter rod (22) may be wrapped by wrappers (242, 243, 244). In addition, the entire cigarette (2) may be re-wrapped by a single wrapper (245). If the filter rod (22) is composed of a plurality of segments, each segment may be wrapped by wrappers (242, 243, 244).

[0064] The first wrapper (241) and the second wrapper (242) may be made of general filter paper. For example, the first wrapper (241) and the second wrapper (242) may be porous paper or non-porous paper. Additionally, the first wrapper (241) and the second wrapper (242) may be made of oil-resistant paper and / or aluminum composite packaging material.

[0065] The third wrapper (243) may be made of hard paper. For example, the basis weight of the third wrapper (243) may be within the range of 88 g / m2 to 96 g / m2, and preferably within the range of 90 g / m2 to 94 g / m2. In addition, the thickness of the third wrapper (243) may be within the range of 120 μm to 130 μm, and preferably 125 μm.

[0066] The fourth wrapper (244) may be manufactured from a hard, oil-resistant paper. For example, the basis weight of the fourth wrapper (244) may be within the range of 88 g / m2 to 96 g / m2, and preferably within the range of 90 g / m2 to 94 g / m2. In addition, the thickness of the fourth wrapper (244) may be within the range of 120 μm to 130 μm, and preferably 125 μm.

[0067] The fifth wrapper (245) may be made of sterilized paper (MFW). Here, the sterilized paper (MFW) refers to paper specially manufactured to have improved tensile strength, water resistance, smoothness, etc. compared to general paper. For example, the basis weight of the fifth wrapper (245) may be within the range of 57 g / m2 to 63 g / m2, and preferably 60 g / m2. In addition, the thickness of the fifth wrapper (245) may be within the range of 64 μm to 70 μm, and preferably 67 μm.

[0068] The fifth wrapper (245) may be coated with a predetermined material. Here, an example of the predetermined material may be silicone, but is not limited thereto. For example, silicone has properties such as heat resistance with little change depending on temperature, oxidation resistance without oxidation, resistance to various chemicals, water repellency, and electrical insulation. However, even if it is not silicone, any material having the aforementioned properties may be applied (or coated) to the fifth wrapper (245) without limitation.

[0069] The fifth wrapper (245) can prevent the cigarette (2) from burning. For example, if the tobacco rod (21) is heated by the heater (13), there is a possibility that the cigarette (2) will burn. Specifically, if the temperature rises above the ignition point of any of the materials contained in the tobacco rod (21), the cigarette (2) may burn. Even in this case, since the fifth wrapper (245) includes a non-combustible material, the cigarette (2) can be prevented from burning.

[0070] In addition, the fifth wrapper (245) can prevent the holder (1) from being contaminated by substances generated from the cigarette (2). Liquid substances may be generated within the cigarette (2) by the user's puff. For example, liquid substances (e.g., moisture, etc.) may be generated when the aerosol generated from the cigarette (2) is cooled by the outside air. As the fifth wrapper (245) wraps the cigarette (2), liquid substances generated within the cigarette (2) can be prevented from leaking out of the cigarette (2).

[0071] The tobacco rod (21) contains an aerosol-generating substance. For example, the aerosol-generating substance may include, but is not limited to, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. In addition, the tobacco rod (21) may contain other additives, such as flavoring agents, humectants, and / or organic acids. In addition, a flavoring agent, such as menthol or a humectant, may be added to the tobacco rod (21) by spraying it onto the tobacco rod (21).

[0072] The tobacco rod (21) can be manufactured in various ways. For example, the tobacco rod (21) can be manufactured as a sheet or a strand. Furthermore, the tobacco rod (21) can be manufactured as a cut tobacco sheet. Furthermore, the tobacco rod (21) can be surrounded by a heat-conducting material. For example, the heat-conducting material can be a metal foil such as aluminum foil, but is not limited thereto. For example, the heat-conducting material surrounding the tobacco rod (21) can evenly distribute the heat transferred to the tobacco rod (21) to improve the heat conductivity applied to the tobacco rod, thereby improving the taste of the tobacco. Furthermore, the heat-conducting material surrounding the tobacco rod (21) can function as a susceptor heated by an induction heater. Although not illustrated in the drawing, the tobacco rod (21) may further include an additional susceptor in addition to the heat-conducting material surrounding the exterior.

[0073] The filter rod (22) may be a cellulose acetate filter. Meanwhile, there is no limitation on the shape of the filter rod (22). For example, the filter rod (22) may be a cylindrical rod or a tubular rod having a hollow portion therein. In addition, the filter rod (22) may be a recessed rod. If the filter rod (22) is composed of a plurality of segments, at least one of the segments may be manufactured in a different shape.

[0074] The first segment of the filter rod (22) may be a cellulose acetate filter. For example, the first segment may be a tubular structure including a hollow space therein. When the heater (13) is inserted through the first segment, the internal material of the tobacco rod (21) may be prevented from being pushed back, and a cooling effect of the aerosol may also be generated. The diameter of the hollow space included in the first segment may be an appropriate diameter within the range of 2 mm to 4.5 mm, but is not limited thereto.

[0075] The length of the first segment may be any length within the range of 4 mm to 30 mm, but is not limited thereto. Preferably, the length of the first segment may be 10 mm, but is not limited thereto.

[0076] The hardness of the first segment can be adjusted by adjusting the content of the plasticizer during the manufacturing of the first segment. In addition, the first segment can be manufactured by inserting a structure, such as a film or tube, of the same or different material into the interior (e.g., hollow).

[0077] The second segment of the filter rod (22) cools the aerosol generated by the heater (13) heating the tobacco rod (21). Accordingly, the user can inhale the aerosol cooled to an appropriate temperature.

[0078] The length or diameter of the second segment may vary depending on the shape of the cigarette (2). For example, the length of the second segment may be appropriately selected within the range of 7 mm to 20 mm. Preferably, the length of the second segment may be approximately 14 mm, but is not limited thereto.

[0079] The second segment can be manufactured by weaving polymer fibers. In this case, a flavoring agent may be applied to the polymer fibers. Alternatively, the second segment can be manufactured by weaving together a separate fiber coated with a flavoring agent and a polymer fiber. Alternatively, the second segment can be formed by a crimped polymer sheet.

[0080] 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.

[0081] As the second segment is formed by a woven polymer fiber or a crimped polymer sheet, the second segment may include one or more longitudinally extending channels. Here, a channel means a passage through which a gas (e.g., air or an aerosol) passes.

[0082] For example, the second segment made of a compressed polymer sheet can be formed from a material having a thickness of between about 5 μm and about 300 μm, for example between about 10 μm and about 250 μm. Furthermore, the total surface area of ​​the second segment can be between about 300 mm2 / mm and about 1000 mm2 / mm. Furthermore, the aerosol-cooling element can be formed from a material having a specific surface area of ​​between about 10 mm2 / mg and about 100 mm2 / mg.

[0083] Meanwhile, the second segment may include a thread containing a volatile flavoring component. Here, the volatile flavoring component may be menthol, but is not limited thereto. For example, the thread may be filled with a sufficient amount of menthol to provide the second segment with at least 1.5 mg of menthol.

[0084] The third segment of the filter rod (22) may be a cellulose acetate filter. The length of the third segment may be suitably selected within the range of 4 mm to 20 mm. For example, the length of the third segment may be approximately 12 mm, but is not limited thereto.

[0085] During the manufacturing process of the third segment, the third segment may be manufactured to generate a flavor by spraying a flavoring agent onto the third segment. Alternatively, a separate fiber coated with a flavoring agent may be inserted into the interior of the third segment. The aerosol generated from the tobacco rod (21) is cooled as it passes through the second segment of the filter rod (22), and the cooled aerosol is delivered to the user through the third segment. Therefore, when a flavoring element is added to the third segment, the effect of enhancing the persistence of the flavor delivered to the user can be produced.

[0086] Additionally, the filter rod (22) may include at least one capsule (23). Here, the capsule (23) may perform a function of generating a flavor or a function of generating an aerosol. For example, the capsule (23) may have a structure in which a liquid containing a flavor is wrapped in a film. The capsule (23) may have a spherical or cylindrical shape, but is not limited thereto.

[0087] Referring to FIG. 4, the cigarette (3) may further include a shear plug (33). The shear plug (33) may be positioned on one side of the tobacco rod (31) facing the filter rod (32). The shear plug (33) may prevent the tobacco rod (31) from escaping to the outside, and may prevent liquefied aerosol from the tobacco rod (31) from flowing into the aerosol generating device (1 of FIGS. 1 to 3) during smoking.

[0088] The filter load (32) may include a first segment (321) and a second segment (322). Here, the first segment (321) may correspond to the first segment of the filter load (22) of FIG. 4, and the second segment (322) may correspond to the third segment of the filter load (22) of FIG. 4.

[0089] The diameter and overall length of the cigarette (3) may correspond to the diameter and overall length of the cigarette (2) of Fig. 4. For example, the length of the shear plug (33) may be about 7 mm, the length of the tobacco rod (31) may be about 15 mm, the length of the first segment (321) may be about 12 mm, and the length of the second segment (322) may be about 14 mm, but is not limited thereto.

[0090] The cigarette (3) may be wrapped by at least one wrapper (35). The wrapper (35) may have at least one hole formed therein through which external air may flow in or internal gas may flow out. For example, the shear plug (33) may be wrapped by a first wrapper (351), the tobacco rod (31) may be wrapped by a second wrapper (352), the first segment (321) may be wrapped by a third wrapper (353), and the second segment (322) may be wrapped by a fourth wrapper (354). In addition, the entire cigarette (3) may be repackaged by a fifth wrapper (355).

[0091] Additionally, at least one perforation (36) may be formed in the fifth wrapper (355). For example, the perforation (36) may be formed in an area surrounding the tobacco rod (31), but is not limited thereto. The perforation (36) may serve to transfer heat generated by the heater (13) illustrated in FIGS. 2 and 3 to the interior of the tobacco rod (31).

[0092] Additionally, the second segment (322) may include at least one capsule (34). Here, the capsule (34) may perform a function of generating a flavor or a function of generating an aerosol. For example, the capsule (34) may have a structure in which a liquid containing a flavor is encapsulated in a film. The capsule (34) may have a spherical or cylindrical shape, but is not limited thereto.

[0093] The first wrapper (351) may be a general filter paper combined with a metal foil, such as aluminum foil. For example, the overall thickness of the first wrapper (351) may be within a range of 45 μm to 55 μm, and preferably 50.3 μm. In addition, the thickness of the metal foil of the first wrapper (351) may be within a range of 6 μm to 7 μm, and preferably 6.3 μm. In addition, the basis weight of the first wrapper (351) may be within a range of 50 g / m2 to 55 g / m2, and preferably 53 g / m2.

[0094] The second wrapper (352) and the third wrapper (353) can be made of general filter paper. For example, the second wrapper (352) and the third wrapper (353) can be porous paper or non-porous paper.

[0095] For example, the porosity of the second wrapper (352) may be 35000 CU, but is not limited thereto. In addition, the thickness of the second wrapper (352) may be within the range of 70 um to 80 um, and preferably may be 78 um. In addition, the basis weight of the second wrapper (352) may be within the range of 20 g / m2 to 25 g / m2, and preferably may be 23.5 g / m2.

[0096] For example, the porosity of the third wrapper (353) may be, but is not limited to, 24000 CU. In addition, the thickness of the third wrapper (353) may be within the range of 60 um to 70 um, and preferably may be 68 um. In addition, the basis weight of the third wrapper (353) may be within the range of 20 g / m2 to 25 g / m2, and preferably may be 21 g / m2.

[0097] The fourth wrapper (354) may be made of PLA paper. Here, the PLA paper refers to three layers of paper including a paper layer, a PLA layer, and a paper layer. For example, the thickness of the fourth wrapper (354) may be within the range of 100 μm to 120 μm, and preferably 110 μm. In addition, the basis weight of the fourth wrapper (354) may be within the range of 80 g / m2 to 100 g / m2, and preferably 88 g / m2.

[0098] The fifth wrapper (355) may be made of sterilized paper (MFW). Here, the sterilized paper (MFW) refers to paper specially manufactured to have improved tensile strength, water resistance, smoothness, etc. compared to general paper. For example, the basis weight of the fifth wrapper (355) may be within the range of 57 g / m2 to 63 g / m2, and preferably 60 g / m2. In addition, the thickness of the fifth wrapper (355) may be within the range of 64 μm to 70 μm, and preferably 67 μm.

[0099] The fifth wrapper (355) may be coated with a predetermined material. Here, an example of the predetermined material may be silicone, but is not limited thereto. For example, silicone has properties such as heat resistance with little change depending on temperature, oxidation resistance without oxidation, resistance to various chemicals, water repellency, and electrical insulation. However, even if it is not silicone, any material having the aforementioned properties may be applied (or coated) to the fifth wrapper (355) without limitation.

[0100] The shear plug (33) may be made of cellulose acetate. For example, the shear plug (33) may be made by adding a plasticizer (e.g., triacetin) to cellulose acetate tow. The mono denier of the filaments constituting the cellulose acetate tow may be within a range of 1.0 to 10.0, preferably within a range of 4.0 to 6.0. More preferably, the mono denier of the filaments of the shear plug (33) may be 5.0. In addition, the cross-section of the filaments constituting the shear plug (33) may be Y-shaped. The total denier of the shear plug (33) may be within a range of 20,000 to 30,000, preferably within a range of 25,000 to 30,000. More preferably, the total denier of the shear plug (33) may be 28000.

[0101] Additionally, if necessary, the shear plug (33) may include at least one channel, and the cross-sectional shape of the channel may be manufactured in various ways.

[0102] The tobacco rod (31) may correspond to the tobacco rod (21) described above with reference to FIG. 4. Therefore, a detailed description of the tobacco rod (31) is omitted below.

[0103] The first segment (321) may be made of cellulose acetate. For example, the first segment may be a tubular structure having a hollow interior. The first segment (321) may be made by adding a plasticizer (e.g., triacetin) to cellulose acetate tow. For example, the mono denier and total denier of the first segment (321) may be the same as the mono denier and total denier of the shear plug (33).

[0104] The second segment (322) may be made of cellulose acetate. The mono denier of the filaments constituting the second segment (322) may be within a range of 1.0 to 10.0, preferably within a range of 8.0 to 10.0. More preferably, the mono denier of the filaments of the second segment (322) may be 9.0. In addition, the cross-section of the filaments of the second segment (322) may be Y-shaped. The total denier of the second segment (322) may be within a range of 20,000 to 30,000, preferably 25,000.

[0105] FIG. 5 is a block diagram of an aerosol generating device (900) according to another embodiment.

[0106] The aerosol generating device (900) may include a control unit (910), a sensing unit (920), an output unit (930), a battery (940), a heater (950), a user input unit (960), a memory (970), and a communication unit (980). However, the internal structure of the aerosol generating device (900) is not limited to that illustrated in FIG. 5. That is, a person skilled in the art related to the present embodiment will understand that some of the components illustrated in FIG. 5 may be omitted or new components may be added depending on the design of the aerosol generating device (900).

[0107] The sensing unit (920) can detect the status of the aerosol generating device (900) or the status around the aerosol generating device (900) and transmit the detected information to the control unit (910). Based on the detected information, the control unit (910) can control the aerosol generating device (900) to perform various functions such as controlling the operation of the heater (950), restricting smoking, determining whether an aerosol generating article (e.g., cigarette, cartridge, etc.) is inserted, and displaying a notification.

[0108] The sensing unit (920) may include, but is not limited to, at least one of a temperature sensor (922), an insertion detection sensor (924), and a puff sensor (926).

[0109] The temperature sensor (922) can detect the temperature at which the heater (950) (or the aerosol generating material) is heated. The aerosol generating device (900) may include a separate temperature sensor that detects the temperature of the heater (950), or the heater (950) itself may function as a temperature sensor. Alternatively, the temperature sensor (922) may be placed around the battery (940) to monitor the temperature of the battery (940).

[0110] The insertion detection sensor (924) can detect the insertion and / or removal of an aerosol-generating article. For example, the insertion detection sensor (924) can include at least one of a film sensor, a pressure sensor, an optical sensor, a resistive sensor, a capacitive sensor, an inductive sensor, and an infrared sensor, and can detect a signal change as the aerosol-generating article is inserted and / or removed.

[0111] The puff sensor (926) can detect the user's puff based on various physical changes in the airflow passage or airflow channel. For example, the puff sensor (926) can detect the user's puff based on any one of temperature changes, flow changes, voltage changes, and pressure changes.

[0112] In addition to the sensors (922 to 926) described above, the sensing unit (9120) may further include at least one of a temperature / humidity sensor, a pressure sensor, a magnetic sensor, an acceleration sensor, a gyroscope sensor, a position sensor (e.g., GPS), a proximity sensor, and an RGB sensor (illuminance sensor). Since the function of each sensor can be intuitively inferred by a person skilled in the art from its name, a detailed description thereof may be omitted.

[0113] The output unit (930) can output information about the status of the aerosol generating device (900) and provide it to the user. The output unit (930) can include at least one of a display unit (932), a haptic unit (934), and an audio output unit (936), but is not limited thereto. When the display unit (932) and the touch pad form a layered structure to form a touch screen, the display unit (932) can be used as an input device in addition to an output device.

[0114] The display unit (932) can visually provide information about the aerosol generating device (900) to the user. For example, the information about the aerosol generating device (900) can mean various information such as the charging / discharging status of the battery (940) of the aerosol generating device (900), the preheating status of the heater (950), the insertion / removal status of the aerosol generating item, or the status in which the use of the aerosol generating device (900) is restricted (e.g., detection of an abnormal item), and the display unit (932) can output the information to the outside. The display unit (932) can be, for example, a liquid crystal display panel (LCD), an organic light-emitting display panel (OLED), or the like. In addition, the display unit (932) can also be in the form of an LED light-emitting element.

[0115] The haptic component (934) can convert an electrical signal into a mechanical stimulus or an electrical stimulus to provide tactile information about the aerosol generating device (900) to the user. For example, the haptic component (934) can include a motor, a piezoelectric element, or an electrical stimulation device.

[0116] The acoustic output unit (936) can provide information about the aerosol generating device (900) to the user audibly. For example, the acoustic output unit (936) can convert an electrical signal into an acoustic signal and output it externally.

[0117] The battery (940) can supply power used to operate the aerosol generating device (900). The battery (940) can supply power so that the heater (950) can be heated. In addition, the battery (940) can supply power required for the operation of other components provided in the aerosol generating device (900) (e.g., the sensing unit (920), the output unit (930), the user input unit (960), the memory (970), and the communication unit (980)). The battery (940) can be a rechargeable battery or a disposable battery. For example, the battery (940) can be a lithium polymer (LiPoly) battery, but is not limited thereto.

[0118] The heater (950) can receive power from the battery (940) to heat the aerosol generating material. Although not illustrated in FIG. 5, the aerosol generating device (900) may further include a power conversion circuit (e.g., a DC / DC converter) that converts the power of the battery (940) and supplies it to the heater (950). In addition, when the aerosol generating device (900) generates the aerosol by induction heating, the aerosol generating device (900) may further include a DC / AC converter that converts the direct current power of the battery (940) into alternating current power.

[0119] The control unit (910), sensing unit (920), output unit (930), user input unit (960), memory (970), and communication unit (910) can perform functions by receiving power from the battery (940). Although not shown in FIG. 5, the device may further include a power conversion circuit, such as an LDO (low dropout) circuit or a voltage regulator circuit, that converts power from the battery (940) and supplies it to each component.

[0120] In one embodiment, the heater (950) may be formed of any suitable electrically resistive material. For example, suitable electrically resistive materials may be metals or metal alloys including, but not limited to, titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, nichrome, and the like. In addition, the heater (950) may be implemented as, but not limited to, a metal heating wire, a metal heating plate having electrically conductive tracks arranged thereon, a ceramic heating element, and the like.

[0121] In another embodiment, the heater (950) may be an induction heating heater. For example, the heater (950) may include a susceptor that heats the aerosol generating material by generating heat through a magnetic field applied by a coil.

[0122] In one embodiment, the heater (950) may include multiple heaters. For example, the heater (950) may include a first heater for heating the cigarette and a second heater for heating the liquid.

[0123] The user input unit (960) can receive information input from a user or output information to the user. For example, the user input unit (960) may include, but is not limited to, a key pad, a dome switch, a touch pad (contact electrostatic capacitance type, pressure resistive film type, infrared detection type, surface ultrasonic conduction type, integral tension measurement type, piezo effect type, etc.), a jog wheel, a jog switch, etc. In addition, although not shown in FIG. 5, the aerosol generating device (900) further includes a connection interface such as a USB (universal serial bus) interface, and can transmit and receive information or charge a battery (940) by connecting to another external device through a connection interface such as a USB interface.

[0124] The memory (970) is hardware that stores various data processed within the aerosol generating device (900), and can store data processed and data to be processed in the control unit (910). The memory (970) may include at least one type of storage medium among a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD or XD memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk. The memory (970) may store data on the operation time of the aerosol generating device (900), the maximum number of puffs, the current number of puffs, at least one temperature profile, and a user's smoking pattern.

[0125] The communication unit (980) may include at least one component for communicating with another electronic device. For example, the communication unit (980) may include a short-range communication unit (982) and a wireless communication unit (984).

[0126] The short-range wireless communication unit (982) may include, but is not limited to, a Bluetooth communication unit, a BLE (Bluetooth Low Energy) communication unit, a near field communication unit, a WLAN (Wi-Fi) communication unit, a Zigbee communication unit, an infrared (IrDA, infrared Data Association) communication unit, a WFD (Wi-Fi Direct) communication unit, an UWB (ultra wideband) communication unit, an Ant+ communication unit, etc.

[0127] The wireless communication unit (984) may include, but is not limited to, a cellular network communication unit, an Internet communication unit, a computer network (e.g., a LAN or WAN) communication unit, etc. The wireless communication unit (984) may also use subscriber information (e.g., an international mobile subscriber identity (IMSI)) to identify and authenticate the aerosol generating device (900) within the communication network.

[0128] The control unit (910) can control the overall operation of the aerosol generating device (900). In one embodiment, the control unit (910) can include at least one processor. The processor can be implemented as an array of multiple logic gates, or can be implemented as a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor. Furthermore, it will be understood by those skilled in the art that the present embodiment can be implemented as other types of hardware.

[0129] The control unit (910) can control the temperature of the heater (950) by controlling the supply of power from the battery (940) to the heater (950). For example, the control unit (910) can control the power supply by controlling the switching of a switching element between the battery (940) and the heater (950). In another example, the heating direct circuit can control the power supply to the heater (950) according to a control command from the control unit (910).

[0130] The control unit (910) can analyze the results detected by the sensing unit (920) and control the processes to be performed thereafter. For example, the control unit (910) can control the power supplied to the heater (950) so that the operation of the heater (950) is started or ended based on the results detected by the sensing unit (920). As another example, the control unit (910) can control the amount of power supplied to the heater (950) and the time for which the power is supplied so that the heater (950) can be heated to a predetermined temperature or maintain an appropriate temperature based on the results detected by the sensing unit (920).

[0131] The control unit (910) can control the output unit (930) based on the result detected by the sensing unit (920). For example, when the number of puffs counted through the puff sensor (926) reaches a preset number, the control unit (910) can notify the user that the aerosol generating device (900) will soon be terminated through at least one of the display unit (932), the haptic unit (934), and the sound output unit (936).

[0132] In one embodiment, the control unit (910) may control the power supply time and / or power supply amount to the heater (950) according to the state of the aerosol generating article detected by the sensing unit (920). For example, when the aerosol generating article (15) is in an over-humidified state, the control unit (910) may control the power supply time to the induction coil (e.g., the induction coil (124) of FIG. 2) to increase the preheating time compared to when the aerosol generating article (15) is in a normal state.

[0133] Figure 6 is a conceptual diagram of a cartridge according to an embodiment.

[0134] A cartridge (400) according to an embodiment may include a container (410) for accommodating a liquid composition and a coating layer (420) having superhydrophobic properties formed along the inner surface of the container (410).

[0135] In an embodiment, the container (410) may have a configuration corresponding to the liquid storage unit of FIGS. 1 and 2.

[0136] The aerosol generating device (1) may include a cartridge (400) containing an aerosol generating substance. The cartridge (400) may be detachably coupled to the main body (500), but is not limited thereto. The cartridge (400) may be formed or assembled integrally with the main body (500), and may be fixed so as not to be detached by a user. The cartridge (400) may be mounted on the main body (500) while containing a liquid composition, which is an aerosol generating substance, therein. However, the present invention is not limited thereto, and the liquid composition may be injected into the cartridge (400) while the cartridge (400) is coupled to the main body (500).

[0137] For example, the liquid composition may be a liquid comprising a tobacco-containing material including volatile tobacco flavor components, or may be a liquid comprising a non-tobacco material.

[0138] The cartridge (400) can perform the function of generating an aerosol by converting the phase of an aerosol generating substance inside the cartridge (400) into a gas phase by operating with an electric signal or wireless signal transmitted from the main body (500). The aerosol may refer to a gas in a mixed state of vaporized particles and air generated from the aerosol generating substance.

[0139] An aerosol generating device (1) can generate an aerosol by heating a liquid composition, and the generated aerosol can be delivered to a user through a cigarette. That is, the aerosol generated from the liquid composition can travel along an airflow passage of the aerosol generating device, and the airflow passage can be configured so that the aerosol can be delivered to a user through the cigarette.

[0140] Fig. 7 is a drawing for explaining a coating layer according to an embodiment.

[0141] A cartridge (400) according to an embodiment may include a coating layer (420) having superhydrophobic properties formed along an inner surface. The coating layer (420) may have a plurality of protrusions (421) formed in the inner direction of the container portion (410).

[0142] In an embodiment, a plurality of protrusions (421) may be formed on a microscale. The protrusions (421) may represent a physical texture or surface roughness. The protrusions (421) may be formed randomly, including fractally or patterned. The protrusions (421) may be implemented as microscale features. For example, the protrusions (421) may have a length scale (L) (e.g., an average pore diameter or an average protrusion height) of about 15 microns to 20 microns. For example, the protrusions (421) may be formed to include spherical or hemispherical protrusions. The protrusions (421) may be formed on the surface of the coating layer (420) by applying mechanical and / or chemical methods, such as lithography, self-assembly, and deposition.

[0143] In an embodiment, the surface of the coating layer (420) may have a surface texture defined by protrusions (421). A gas, such as air, may occupy the area between the protrusions (421) of the coating layer (420). The liquid composition may contact the upper portion of the protrusions (421), and the formation of a gas-liquid interface may prevent the liquid composition from impregnating the entire surface of the coating layer (420).

[0144] Through this, the coating layer (420) has ultra-hydrophobic properties and can prevent the liquid composition from remaining inside the cartridge (400).

[0145] However, in certain cases, the liquid composition may replace the gas remaining between the protrusions (421) and penetrate into the area between the protrusions (421). For example, such penetration may occur when the liquid composition collides with the surface of the coating layer (420) at high speed. When penetration by the liquid composition occurs, the liquid composition may partially or completely replace the gas occupying the area between the protrusions (421), thereby deteriorating the superhydrophobic properties of the surface of the coating layer (420).

[0146] In FIGS. 8 and 9, a technique for preventing deterioration of these ultra-small-sized characteristics is described through another embodiment of the present invention.

[0147] FIG. 8 and FIG. 9 are drawings for explaining a coating layer according to another embodiment.

[0148] Referring to FIGS. 8 and 9, the coating layer (420) according to the embodiment may include a base layer (423) disposed along the inner surface of the container portion (410) and having protrusions (422) formed on the surface in the inner direction of the container portion (410) and a liquid layer (424) disposed between the protrusions (422) of the base layer (423).

[0149] According to an embodiment, a coating layer (420) may be provided with a surface having superhydrophobic properties by impregnating a liquid layer (424) between protrusions (422). A liquid composition in contact with the surface of the coating layer (420) may be positioned on the protrusions (422) of the surface. In the region between the protrusions (422), the liquid layer (424) may support the liquid composition. The protrusions (422) of the base layer (423) may be formed on a microscale, and the liquid layer (424) may have an immiscibility property so as not to mix with the liquid composition. For example, the liquid layer (424) may have an immiscibility property with respect to propylene glycol (PG) and vegetable glycerin.

[0150] The base layer (423) may include any inherently hydrophobic, oleophobic, and / or salt-repellent material or coating. For example, the base layer (423) may include a hydrocarbon, such as an alkane, and a fluoropolymer, such as Teflon, trichloro(1H,1H,2H,2H-perfluorooctyl)silane (TCS), octadecyltrichlorosilane (OTS), heptadecafluoro-1,1,2,2-tetrahydrodecyltrichlorosilane, fluoroPOSS, and / or other fluoropolymers. Additional possible materials or coatings for the base layer (423) include ceramics, polymeric materials, fluorinated materials, intermetallic compounds, and composite materials. Polymeric materials may include, for example, polytetrafluoroethylene, fluoroacrylates, fluoroeurathanes, fluorosilicones, fluorosilanes, modified carbonates, chlorosilanes, silicones, polydimethylsiloxane (PDMS), and / or combinations thereof. Ceramics may include, for example, titanium carbide, titanium nitride, chromium nitride, boron nitride, chromium carbide, molybdenum carbide, titanium carbonitride, electroless nickel, zirconium nitride, fluorinated silicon dioxide, titanium dioxide, tantalum oxide, tantalum nitride, diamond-like carbon, fluorinated diamond-like carbon, and / or combinations thereof. Intermetallic compounds may include, for example, nickel aluminide, titanium aluminide, and / or combinations thereof.

[0151] The protrusions (422) may refer to a physical texture or surface roughness. The protrusions (422) may be randomly formed, including fractal or patterned. The protrusions (422) may be implemented as micro-scale features. For example, the protrusions (422) may have a length scale (L) (e.g., an average pore diameter or an average protrusion height) of about 15 microns to about 20 microns. For example, the protrusions (422) may be formed to include spherical or hemispherical protrusions. The protrusions (422) may be formed on the surface of the base layer (423) by applying mechanical and / or chemical methods, such as lithography, self-assembly, and deposition.

[0152] The liquid layer (424) can be any type of liquid that can provide superhydrophobic properties to the materials constituting the liquid composition. For example, the liquid layer (424) can be oily or aqueous (i.e., aqueous). For example, the liquid layer (424) can be an ionic liquid (e.g., BMI-IM). Other examples of materials constituting the liquid layer (424) include hexadecane, vacuum pump oil, fluorocarbons (e.g., perfluoro-tripentylamine, FC-70), shear thinning fluids, shear thickening fluids, liquid polymers, dissolved polymers, viscoelastic fluids, and / or liquid fluoroPOSS. For example, the liquid layer can be embodied as a liquid metal, a dielectric fluid, a liquid magnet, a magnetorheological (MR) fluid, an electrorheological (ER) fluid, an ionic fluid, a hydrocarbon liquid, and / or a fluorocarbon liquid.

[0153] The liquid layer (424) can be prepared by shear thickening through the introduction of nanoparticles. For example, a shear thickening liquid layer can be applied to prevent the liquid composition from penetrating between the protrusions (422) and to resist collisions from the liquid composition.

[0154] To minimize evaporation of the liquid layer (424) from the surface of the coating layer (420), a liquid layer (424) having a low vapor pressure (e.g., less than 0.1 mmHg, less than 0.001 mmHg, less than 0.00001 mmHg, or less than 0.000001 mmHg) may be used. For example, the freezing point of the liquid layer (424) may be less than -20°C, less than -40°C, or about -60°C. In addition, the surface tension of the liquid layer (424) may be about 15 mN / m, about 20 mN / m, or about 40 mN / m, and the viscosity of the liquid layer (424) may be about 10 cSt to about 1000 cSt.

[0155] In embodiments, a coating process such as dip coating, blade coating, or roller coating may be used to apply the liquid layer (424) to the surface of the base layer (423). Alternatively, the liquid layer (424) may be introduced and / or replenished with a liquid material flowing past the surface (e.g., in a conduit). After the liquid layer (424) is applied, capillary forces may hold the liquid in the liquid layer (424) in place. The capillary forces may vary in magnitude with the distance between protrusions or the inverse of the pore radius, and may be designed to hold the liquid in the liquid layer (424) in place despite movement of the surface and movement of air or other fluids over the surface.

[0156] The liquid layer (424) according to the embodiment may be resistant to penetration of the liquid composition because the liquid cannot be compressed over a wide range of pressures.

[0157] Additionally, the liquid layer (424) according to the embodiment can reduce the viscous drag between the surface of the base layer (423) and the flowing liquid composition.

[0158] Additionally, the liquid layer (424) according to the embodiment can induce a large amount of sliding on a solid surface through its superhydrophobic properties. When the liquid layer (424) or gas supports the liquid composition, the liquid-liquid or liquid-gas interface freely flows or slides against the underlying solid material. This sliding can achieve a drag reduction as high as 40%. However, as described above, the liquid composition can penetrate the region between the protrusions formed by the gas, and when this penetration occurs, the advantage of the reduced drag reduction can be lost.

[0159] In an embodiment, the liquid layer (424) can reduce the viscous drag between the solid surface and the flowing liquid composition. The liquid layer (424) can increase the slippage of the contacting liquid composition, thereby drastically reducing the viscous drag between the liquid and the solid.

[0160] In some embodiments, the liquid layer (424) may provide self-cleaning capabilities. For example, particles and chemicals on the surface of the liquid layer (424) may be absorbed and swept away by droplets that are removed from the surface. This self-cleaning property may help maintain cleanliness within the cartridge (400).

[0161] The liquid layer (424) may also be used to facilitate condensation of the liquid composition. For example, the liquid layer (424) may be used to facilitate removal of condensate, thereby increasing condensation heat transfer (e.g., dropwise condensation).

[0162] In an embodiment, the liquid composition accommodated in the cartridge (400) may include propylene glycol (PG) and vegetable glycerin. For example, the liquid layer (424) may have a thickness of 100 microns to 500 microns. If the thickness of the liquid layer (424) is less than 100 microns, the ability to prevent penetration of propylene glycol (PG) and vegetable glycerin, which are the main components of the liquid composition, may not be sufficient, and if it exceeds 500 microns, the overall thickness of the coating layer (420) increases.

[0163] Propylene glycol is a colorless, viscous liquid with almost no odor but a faintly sweet taste. Its chemical formula is CH3CH(OH)CH2OH and it can have a viscosity of about 60.5 cP at 20°C.

[0164] Glycerin (glycerol) is a colorless, odorless liquid. It is characterized by very high viscosity. Glycerin is shown in the table below. <1> It has a viscosity of about 825 mpas (= 825 cps) at a temperature of 25°C, a viscosity of about 367.5 mpas at a temperature of 35°C, and a viscosity of about 178.5 mpas at a temperature of 45°C.

[0165] Glycerol (99%)Temperature (°C)Viscosity (mPa·s)2582535367.545178.5

[0166] The viscosity of a material constituting a liquid composition may vary depending on the temperature and the content of the material. As shown in Table 1, it can be confirmed that the viscosity of glycerin, which has a relatively high viscosity compared to propylene glycol, decreases significantly as the temperature increases. Therefore, the cartridge (400) according to the embodiment can be implemented to have superhydrophobic properties for glycerin with a high viscosity, thereby simultaneously having superhydrophobic properties for propylene glycol. In addition, the cartridge (400) according to the embodiment can implement a coating layer (420) so that the superhydrophobic properties vary depending on the distance from the heater, which is a heat source, in consideration of the viscosity characteristics that change depending on the temperature.

[0167] Figures 10 to 15 are drawings for explaining a coating layer according to another embodiment.

[0168] The coating layer (420) according to the embodiment may implement a protrusion scale so that the superhydrophobic properties vary depending on the distance between the heater (510) and the coating layer (420). For example, the area of ​​the coating layer (420) that is close to the heater (510) may have a relatively high temperature, and thus the viscosity of propylene glycol and glycerin constituting the liquid composition may appear low. In addition, the area of ​​the coating layer (420) that is far from the heater (510) may have a relatively low temperature, and thus the viscosity of propylene glycol and glycerin constituting the liquid composition may appear high.

[0169] Considering these viscosity characteristics, the protrusion scale in the area far from the heater (510) can be implemented smaller than that in the area close to the heater (510). As described above, the smaller the protrusion scale, that is, the smaller the protrusion (425) is implemented and the narrower the gap between the protrusions (425), the stronger the superhydrophobic characteristic can be. Therefore, by implementing the protrusion scale in the area far from the heater (510) to be smaller than that in the area relatively close to the heater (510), it is possible to implement a coating layer (420) in which the superhydrophobic characteristic is stronger in the area where the viscosity appears high. Here, the scale can be used as a concept defined by the size (height, length, width, etc.) of the protrusion (425) and the gap between the protrusions (425).

[0170] That is, according to an embodiment, a coating layer (420) whose ultra-hydrophobic properties are strengthened as the distance from the heater (510) increases can be implemented.

[0171] Referring to FIG. 10, the size of the protrusion (425) may be reduced in proportion to the distance (D) between the heater (510) and the coating layer (420). As the size of the protrusion (425) increases, the scale of the protrusion (425) increases, and the superhydrophobic properties decrease. In conclusion, it is possible to implement enhanced superhydrophobic properties in an area located relatively far from the heater (510) compared to an area located close to the heater (510).

[0172] For example, when the heater (510) is in operation, the temperature inside the cartridge (400) can be measured by region, and the size of the protrusion (425) can be determined in proportion to the measured temperature. That is, the surface of the coating layer (420) can be formed so that the size of the protrusion (425) increases in proportion to the measured temperature.

[0173] Referring to Fig. 11, the spacing between the protrusions (425) may be reduced in proportion to the distance (D) between the heater (510) and the coating layer (420). As the spacing between the protrusions (425) increases, the scale of the protrusions (425) increases, and the superhydrophobic properties decrease. In conclusion, it is possible to implement enhanced superhydrophobic properties in an area located relatively far from the heater (510) compared to an area located close to the heater (510).

[0174] For example, when the heater (510) is in operation, the temperature inside the cartridge (400) can be measured by region, and the spacing between the protrusions (425) can be determined in proportion to the measured temperature. That is, the surface of the coating layer (420) can be formed so that the spacing between the protrusions (425) increases in proportion to the measured temperature.

[0175] Referring to Fig. 12, by combining the protrusion characteristics of Figs. 10 and 11, the size of the protrusion (425) can be reduced in proportion to the distance between the heater (510) and the coating layer (420), and the gap between the protrusions (425) can be widened.

[0176] Alternatively, as shown in FIGS. 13 to 15, a region above a preset temperature may form micro-scale protrusions (426), and a region below a preset temperature may form nano-scale protrusions (427), thereby forming a coating layer (420). Since the nano-scale is relatively difficult to manufacture compared to the micro-scale, even if micro-scale protrusions are implemented in a region where the liquid composition can have sufficiently low viscosity characteristics, the liquid composition can be prevented from remaining inside the container.

[0177] Referring to FIG. 13, the size of the protrusion (426) formed in an area where the temperature inside the cartridge (400) is higher than the preset temperature may be larger than the size of the protrusion (427) formed in an area where the temperature inside the cartridge (400) is lower than the preset temperature. That is, when the straight-line distance between the heater (510) and the coating layer (420) is within a certain distance, a protrusion (426) having a size a may be formed, and when the straight-line distance between the heater (510) and the coating layer (420) is outside the certain distance, a protrusion (427) having a size b (a > b) may be formed. In conclusion, enhanced superhydrophobic properties may be implemented in an area located relatively far away compared to an area located within a certain distance from the heater (510).

[0178] Referring to FIG. 14, the spacing between the protrusions (428) formed in an area where the temperature inside the cartridge (400) is higher than the preset temperature may be wider than the spacing between the protrusions (429) formed in an area where the temperature inside the cartridge (400) is lower than the preset temperature. That is, when the straight-line distance between the heater (510) and the coating layer (420) is within a certain distance, the spacing between the protrusions (428) may be c, and when the straight-line distance between the heater (510) and the coating layer (420) is outside the certain distance, the coating layer (420) may be implemented so that the spacing between the protrusions (429) is d (c > d). In conclusion, it is possible to implement enhanced superhydrophobic properties in an area located relatively far away from the heater (510) compared to an area located within a certain distance from the heater (510).

[0179] Referring to Fig. 15, by combining the protrusion characteristics of Figs. 10 and 11, the protrusions (428) in the region where the temperature inside the cartridge (400) is higher than the preset temperature can be formed larger than the protrusions (429) formed in the region lower than the preset temperature, and can be formed with a wider gap between them.

[0180] An embodiment may also be implemented in the form of a recording medium containing computer-executable instructions, such as program modules, executed by a computer. Computer-readable media can be any available media that can be accessed by a computer, and includes both volatile and nonvolatile media, removable and non-removable media. Furthermore, computer-readable media can include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules, or other data. Communication media typically includes computer-readable instructions, data structures, other data, such as program modules, in a modulated data signal, or other transport mechanism, and includes any information delivery media.

Claims

1. A container portion for accommodating a liquid composition that generates an aerosol when heated; and It includes a coating layer having superhydrophobic properties formed along the inner surface of the container portion, A cartridge in which the coating layer has a plurality of micro-scale protrusions formed in the inner direction of the container portion.

2. In the first paragraph, the coating layer, A base layer arranged along the inner surface of the container and having protrusions formed on the surface in the inner direction of the container; and A cartridge comprising a liquid layer disposed between the protrusions of the base layer.

3. In paragraph 2, The above liquid layer is a cartridge that supports a liquid composition contained in the above container.

4. In paragraph 2, A cartridge in which the liquid layer has an immiscible property with respect to the liquid composition contained in the container.

5. In paragraph 4, The above liquid layer is a cartridge having immiscible properties with respect to propylene glycol (PG) and glycerin.

6. In paragraph 5, The above liquid layer is a cartridge having an immiscible property for a substance having a viscosity of 825cp or less.

7. In paragraph 1, A cartridge in which the superhydrophobic properties differ depending on the distance between the heater that heats the liquid composition and the coating layer.

8. In paragraph 7, A cartridge in which the above ultra-small number characteristics are strengthened as the distance from the above heater increases.

9. In paragraph 7, A cartridge having different sizes of the protrusions and different spacing between the protrusions depending on the distance from the heater.

10. In the aerosol generating device, A battery that supplies power used to operate the aerosol generating device; a control unit comprising at least one processor; and Includes cartridge, The above cartridge, A container portion containing a liquid composition that generates an aerosol when heated; and It includes a coating layer having superhydrophobic properties formed along the inner surface of the container portion, An aerosol generating device in which the coating layer has a plurality of micro-scale protrusions formed in the inner direction of the container portion.

11. In paragraph 10, The above coating layer is, A base layer arranged along the inner surface of the container and having protrusions formed on the surface in the inner direction of the container; and An aerosol generating device comprising a liquid layer disposed between protrusions of the base layer.

12. In paragraph 11, An aerosol generating device that supports a liquid composition contained in the container portion.

13. In paragraph 11, An aerosol generating device in which the liquid layer has an immiscible property with respect to a liquid composition contained in the container.

14. In paragraph 10, An aerosol generating device in which the superhydrophobic properties differ depending on the distance between the heater that heats the liquid composition and the coating layer.

15. In paragraph 10, An aerosol generating device in which the size of the protrusions and the spacing between the protrusions are different depending on the distance from the heater.

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