Aerosol generation device and its operation method

Abstract

An aerosol generating device in one embodiment includes a housing including an airflow passage, a sensor unit including an inductor and whose shape is deformed based on the airflow flowing through the airflow passage, and a processor connected to the sensor unit, the processor measures an inductance value of the inductor which changes depending on the degree of deformation of the sensor unit, and detects a puff based on the measured inductance value which is maintained above a first critical value for a first time interval.

Description

Technical Field

[0001] The present invention relates to an aerosol generating device and an operating method thereof, and more particularly, to an aerosol generating device and an operating method thereof that detect puff through an inductance change caused by the flow of air.

Background Art

[0002] Recently, the demand for alternative methods to overcome the disadvantages of conventional cigarettes has been increasing. For example, there is an increasing demand for a method of generating an aerosol by heating an aerosol generating substance, rather than a method of burning a cigarette to generate an aerosol. Accordingly, research related to heated aerosol generating devices has been actively conducted.

[0003] An aerosol generating device can determine its own usage state and transmit information related to the state of the aerosol generating device to the user. For example, the aerosol generating device can detect a puff by the user. Conventionally, a method of detecting a puff through a pressure sensor disposed in a separate chamber distinct from the air flow path has been used, but such a conventional method has problems in that the placement position of the sensor is limited, it is vulnerable to contamination, and the puff detection performance deteriorates.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present embodiment provides an aerosol generating device and an operating method thereof that can precisely detect a puff of a user by sensing a fine flow of air.

[0005] The problems to be solved through the present embodiment are not limited to the aforementioned problems, and problems not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present embodiment belongs from the present specification and the accompanying drawings.

Means for Solving the Problems

[0006] An aerosol generating device according to an embodiment includes a housing including an air flow path, a sensor unit including an inductor and deformed in shape by an air flow flowing through the air flow path, and a processor connected to the sensor unit. The processor measures an inductance value of the inductor that changes according to a degree of deformation of the sensor unit, and may detect puff if the measured inductance value is maintained at or above a first critical value during a first time interval.

[0007] An operating method of an aerosol generating device according to an embodiment includes measuring an inductance value through a sensor unit including an inductor and deformed in shape by an air flow flowing through an air flow path, and detecting puff if the measured inductance value is maintained at or above a first critical value during a first time interval.

Advantages of the Invention

[0008] The aerosol generating device according to the foregoing embodiment can implement a highly sensitive puff sensing function through a sensor that is sensitive to the flow of air.

[0009] In addition, the sensor included in the aerosol generating device according to the foregoing embodiment has a relatively small volume, can be arranged at any position where the air flow flows, and further enables a more flexible internal design of the aerosol generating device.

[0010] The effects according to the present embodiment are not limited to the foregoing effects, and effects not mentioned may be clearly understood by those having ordinary knowledge in the technical field to which the present embodiment pertains from the present specification and the accompanying drawings.

Brief Description of the Drawings

[0011]

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Mode for Carrying Out the Invention

[0012] An aerosol generating device according to an embodiment includes a housing including an air flow path, a sensor unit including an inductor, the shape of which is deformed based on an air flow flowing through the air flow path, and a processor connected to the sensor unit. The processor measures an inductance value of the inductor that changes according to a degree of deformation of the sensor unit, and can detect a puff based on the measured inductance value maintained at or above a first threshold value during a first time interval.

[0013] Further, the processor can detect a puff based on the measured inductance value maintained at or above a second threshold value during a second time interval after being maintained at or above the first threshold value during the first time interval.

[0014] Also, the second threshold value is smaller than the first threshold value, and the second time interval is shorter than the first time interval.

[0015] Also, the aerosol generating device includes a user interface, and the processor can control the user interface to output a display of the detected puff to the user.

[0016] Also, the user interface can be configured to output a display in a visual, auditory, or tactile manner.

[0017] Also, the aerosol generating device further includes a heater that heats an aerosol generating substance, and the processor can control the power applied to the heater based on detecting the puff.

[0018] Also, the aerosol generating device further includes a heater that heats an aerosol generating substance, and the processor can detect the puff based on the heater operating.

[0019] Further, the sensor unit includes a panel deformed by an air flow and a base on which the panel and the inductor are disposed, and corresponds to deformation of at least one of the panel and the base, and the inductance of the inductor can change.

[0020] Further, the base is a cantilever and can protrude from the inner surface of the air flow path.

[0021] Further, the base includes a plurality of holes allowing the passage of an air flow and can be disposed so as to cover at least a part of the air flow path.

[0022] Further, the aerosol generating device further includes a chamber branched at a point in the air flow path so that an air flow can enter and exit, and the sensor unit can be disposed in the chamber.

[0023] Further, the base can be disposed so as to cover at least a part of the chamber.

[0024] Further, the inductor also includes a planar coil.

[0025] Further, the sensor unit also includes an array in which a plurality of planar coils are arranged.

[0026] An operation method of an aerosol generating device according to an embodiment includes a step of measuring an inductance value through a sensor unit of the aerosol generating device whose shape is deformed based on an air flow flowing through an air flow path and including an inductor, and a step of detecting a puff based on the measured inductance value maintained at a first critical value or more during a first time interval.

[0027] The terms used in this embodiment are, as much as possible, general terms that are currently widely used while taking into account the functions in the present invention. However, they may vary depending on the intentions of those skilled in the art, precedents, or the emergence of new technologies. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in such cases, the meaning thereof will be described in detail in the description of the invention. Therefore, the terms used in the present invention must be defined based not on the simple names of the terms but on the meanings the terms have and the overall content of the present invention.

[0028] Throughout the specification, when a certain part "includes" a certain component, it means that, unless there is a special contrary description, it does not exclude other components and may further include other components. Also, terms such as "~ part" and "~ module" described in the specification mean units that process at least one function or operation, and they may be implemented by hardware or software, or may be implemented by a combination of hardware and software.

[0029] As used in this specification, when an expression such as "at least any one of" is in front of the arranged components, it modifies the entire components, not each of the arranged components. For example, the expression "at least any one of a, b, and c" must be interpreted as including a, b, c, a and b, a and c, b and c, or a, b, and c.

[0030] Hereinafter, with reference to the accompanying drawings, non-limiting embodiments of the present invention will be described in more detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement the embodiments of the present invention. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein.

[0031] Also, terms including ordinal numbers such as "first" or "second" used in this specification can be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

[0032] In addition, some of the components in the drawings are also illustrated with some exaggeration in terms of their size, ratio, etc. Also, a component illustrated in one drawing may not be illustrated in other drawings.

[0033] Also, throughout the specification, the "longitudinal direction" of a component is also the direction in which the component extends along a one-direction axis of the component. At this time, the one-direction axis of the component may mean the direction in which the component extends longer than another direction axis crossing the one-direction axis. For example, the longitudinal direction of the aerosol generating device may mean the direction parallel to the direction in which the airflow is discharged from the aerosol generating device in FIGS. 1 to 3.

[0034] Throughout the specification, "embodiment" is any division for easily explaining the invention in the present disclosure, and each of the embodiments does not necessarily need to be mutually exclusive. For example, the configuration disclosed in one embodiment can be applied and / or embodied in other embodiments, and can be changed, applied and / or embodied within the scope not departing from the present disclosure.

[0035] Also, the terms used in the present disclosure are for explaining the present embodiment and do not limit the present embodiment. In the present disclosure, the singular form includes the plural form unless otherwise specifically mentioned.

[0036] FIG. 1 is a drawing showing an aerosol generating device according to one embodiment, FIG. 2 is a drawing showing an aerosol generating device according to another embodiment, and FIG. 3 is a drawing showing an aerosol generating device according to still another embodiment.

[0037] Referring to FIG. 1, an aerosol generating device 100a according to an embodiment also includes a battery 110, a processor 120, a heater 130a, an air flow path 160, and a sensor unit 170. Further, an aerosol generating article 200 can be inserted into the internal space of the housing 101 of the aerosol generating device 100a.

[0038] Referring to FIG. 2, an aerosol generating device 100b according to another embodiment also includes a battery 110, a processor 120, a heater 130b, an atomizer 140, an air flow path 160, and a sensor unit 170. Referring to FIG. 3, an aerosol generating device 100c according to still another embodiment also includes a battery 110, a processor 120, a heater 130c, a liquid storage unit 150c, an air flow path 160, and a sensor unit 170.

[0039] In the aerosol generating devices 100a, 100b, 100c illustrated in FIGS. 1 to 3, the components according to this embodiment are illustrated. Therefore, those having ordinary knowledge in the technical field related to this embodiment will be able to understand that other components may be further included in the aerosol generating devices 100a, 100b, 100c in addition to the components illustrated in FIGS. 1 to 3.

[0040] When the aerosol generating article 200 is inserted into the aerosol generating devices 100a, 100b, the aerosol generating devices 100a, 100b can operate the heaters 130a, 130b and / or the atomizer 140 to generate aerosol from the aerosol generating article 200 and / or the atomizer 140. The aerosol generated by the heaters 130a, 130b and / or the atomizer 140 passes through the aerosol generating article 200 and is transmitted to the user. Here, the aerosol may mean a gas in a state where vaporized particles generated from the aerosol generating substance and air are mixed.

[0041] Optionally, even when the aerosol generating article 200 is not inserted into the aerosol generating devices 100a, 100b, 100c, the aerosol generating devices 100a, 100b, 100c can heat the heaters 130a, 130b, 130c.

[0042] For example, the aerosol generating device 100a according to one embodiment can heat the heater 130a in a state where the aerosol generating article 200 is not inserted, and can remove residues in the internal space of the housing 101.

[0043] As another example, the aerosol generating device 100c according to still another embodiment can convert the phase of the aerosol generating substance stored in the liquid storage unit 150c into a gas phase and generate an aerosol in a state where the aerosol generating article 200 is not inserted. The battery 110 supplies power used for the aerosol generating devices 100a, 100b, 100c to operate. For example, the battery 110 can supply power so that the heaters 130a, 130b, 130c or the vaporizer 140 can be heated, and can supply power necessary for the processor 120 to operate. Further, the battery 110 can supply power necessary for a display, a sensor, a motor, etc. provided in the aerosol generating devices 100a, 100b, 100c to operate.

[0044] The processor 120 generally controls the operation of the aerosol generating devices 100a, 100b, 100c. Specifically, the processor 120 controls the operation of not only the battery 110, the heaters 130a, 130b, 130c and the vaporizer 140, but also other components included in the aerosol generating devices 100a, 100b, 100c. Further, the processor 120 can check the state of each component of the aerosol generating devices 100a, 100b, 100c and determine whether the aerosol generating devices 100a, 100b, 100c are in an operable state.

[0045] The processor 120 may also be implemented by an array of a large number of logic gates, or by a combination of a general-purpose microprocessor and a memory storing a program executable on the microprocessor. Also, the fact that it may be implemented by other forms of hardware should be understandable to those with ordinary knowledge in the technical field to which the present embodiment belongs.

[0046] The heaters 130a, 130b, and 130c can be operated by the power supplied from the battery 110. For example, if the aerosol-generating article 200 is inserted into the aerosol-generating device 100b, the heater 130b may be located outside the aerosol-generating article 200. Therefore, the heated heater 130b can raise the temperature of the aerosol-generating substance in the aerosol-generating article 200.

[0047] The heaters 130a, 130b, and 130c are also electrical resistance heaters. For example, the heaters 130a, 130b, and 130c include electrically conductive tracks, and when an electric current flows through the electrically conductive tracks, the heaters 130a, 130b, and 130c can be heated. However, the heaters 130a, 130b, and 130c are not limited to the above example, and any heater that can be heated to a desired temperature is applicable without limitation. Here, the desired temperature is also a preset temperature in the aerosol-generating devices 100a, 100b, and 100c, and can also be set to a desired temperature by the user.

[0048] As another example, the heaters 130a, 130b, and 130c are also induction heaters. Specifically, the heaters 130a, 130b, and 130c include an electrically conductive coil for heating the aerosol-generating article by an induction heating method, and the aerosol-generating article also includes a susceptor that can be heated by the induction heater.

[0049] For example, each of the heaters 130a, 130b, and 130c may also include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, and depending on the form of the heating element, it is possible to heat the inside or outside of the aerosol generating article 200.

[0050] In addition, multiple heaters may also be arranged in the aerosol generating devices 100a, 100b, and 100c. At this time, the multiple heaters may also be arranged to be inserted inside the aerosol generating article 200, and may also be arranged outside the aerosol generating article 200. Also, some of the multiple heaters may be arranged to be inserted inside the aerosol generating article 200, and the rest may be arranged outside the aerosol generating article 200. Further, the shape of the heater is not limited to the shapes illustrated in FIGS. 1 to 3, and can be made in various shapes.

[0051] The aerosol generating article 200 may also be similar to a general combustible cigarette. For example, the aerosol generating article 200 may be divided into a first part containing an aerosol generating substance and a second part containing a filter or the like. Alternatively, the second part of the aerosol generating article 200 may also contain an aerosol generating substance. For example, an aerosol generating substance made in the form of granules or capsules may be inserted into the second part.

[0052] The tobacco rod included in the aerosol generating article 200 also contains an aerosol generating substance. For example, the aerosol generating substance may be one containing at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. Further, the tobacco rod may also contain other additive substances such as flavoring agents, wetting agents, and / or organic acids. Also, a flavoring liquid such as menthol or a humectant is added to the tobacco rod by spraying it onto the tobacco rod.

[0053] The tobacco rod can be manufactured in various ways. For example, the tobacco rod can be manufactured by a sheet or by a strand. Also, the tobacco rod can be manufactured by shredded tobacco in which the tobacco sheet is finely shredded. Further, the tobacco rod is surrounded by a heat-conductive material. For example, the heat-conductive material can be a metal foil such as aluminum foil, but is not limited thereto. As an example, the heat-conductive material surrounding the tobacco rod can evenly disperse the heat transmitted to the tobacco rod, improve the heat conductivity applied to the tobacco rod, and thereby improve the tobacco flavor. Also, the heat-conductive material surrounding the tobacco rod can function as a susceptor heated by an induction heating heater. At this time, although not shown in the drawings, the tobacco rod may further include an additional susceptor in addition to the heat-conductive material surrounding the outside.

[0054] Inside the aerosol generation devices 100a and 100b, the entire first part is inserted, and the second part can be exposed to the outside. Alternatively, only a part of the first part can be inserted inside the aerosol generation devices 100a and 100b, and also the entire first part and a part of the second part can be inserted. The user can inhale the aerosol with the second part in the mouth. At this time, the aerosol is generated by the outside air passing through the first part, and the generated aerosol passes through the second part and is transmitted to the user's mouth.

[0055] As yet another example, the aerosol generation devices 100b and 100c can generate an aerosol from an aerosol generating substance by utilizing an ultrasonic vibration method. The ultrasonic vibration method may mean a method of generating an aerosol by atomizing the aerosol generating substance with ultrasonic vibrations generated by a vibrator. Due to the short-period vibrations generated from the vibrator, the aerosol generating substance can be vaporized and / or atomized into an aerosol. The vibrator includes, for example, piezoelectric ceramics, and the piezoelectric ceramics are functional materials that can mutually convert electricity and mechanical force by generating electricity (voltage) with a physical force (pressure) and generating vibrations (mechanical force) when electricity is applied thereto.

[0056] The vaporizer 140 can heat a liquid composition to generate an aerosol, and the generated aerosol can pass through the aerosol generating article 200 and be transmitted to the user. In other words, the aerosol generated by the vaporizer 140 can move along the air flow path of the aerosol generation device 100b, and the air flow path can be configured such that the aerosol generated by the vaporizer 140 passes through the aerosol generating article 200 and is transmitted to the user.

[0057] For example, the vaporizer 140 includes, but is not limited to, a liquid storage unit 150b, a liquid transfer means, and a heating element 142. For example, the liquid storage unit 150b, the liquid transfer means, and the heating element 142 may also be included in the aerosol generation device 100b as independent modules.

[0058] The liquid storage units 150b and 150c can store a liquid composition. For example, the liquid composition may be a liquid containing a tobacco-containing substance including a volatile tobacco flavor component or a liquid containing a non-tobacco substance. The liquid storage unit 150b is also fabricated so as to be detachable from / to the vaporizer 140, or may be fabricated integrally with the vaporizer 140.

[0059] For example, the liquid composition may also contain water, a solvent, ethanol, a plant extract, a fragrance, a flavoring agent, or a vitamin mixture. The fragrance may include menthol, peppermint, spearmint oil, and aroma components of various fruits, etc., but is not limited thereto. The flavoring agent may also contain components that can provide various fragrances or flavors to the user. The vitamin mixture may also be a mixture in which at least one of vitamin A, vitamin B, vitamin C, and vitamin E is mixed, but is not limited thereto. Further, the liquid composition may also contain an aerosol-forming agent such as glycerin and propylene glycol.

[0060] For example, the liquid composition may also contain a solution of glycerin and propylene glycol in any weight ratio to which a nicotine salt is added. The liquid composition may also contain two or more types of nicotine salts. The nicotine salt can be formed by adding a suitable acid containing an organic acid or an inorganic acid to nicotine. Nicotine can be natural nicotine or synthetic nicotine and can have any suitable weight concentration relative to the total solution weight of the liquid composition.

[0061] The acid for the formation of the nicotine salt can be appropriately selected in consideration of factors such as the blood nicotine absorption rate, the operating temperature of the aerosol generating devices 100b, 100c, the fragrance or flavor, solubility, etc. For example, the acid for the formation of the nicotine salt can be a single acid selected from the group consisting of benzoic acid, lactic acid, salicylic acid, lauric acid, sorbic acid, levulinic acid, pyruvic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, capric acid, citric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, phenylacetic acid, tartaric acid, succinic acid, fumaric acid, gluconic acid, saccharic acid, malonic acid, or malic acid, or a mixture of two or more acids selected from the aforementioned group, but is not limited thereto.

[0062] The liquid transfer means can transfer the liquid composition in the liquid storage part 150b to the heating element 142. For example, the liquid transfer means can be a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramics, but is not limited thereto.

[0063] The heating element 142 is an element for heating the liquid composition transferred by the liquid transfer means. For example, the heating element 142 can be a metal heating wire, a metal hot plate, a ceramic heater, etc., but is not limited thereto. Also, the heating element 142 is constituted by a conductive filament such as a nichrome wire and is also arranged in a structure wound around the liquid transfer means. The heating element 142 is heated by current supply, transfers heat to the liquid composition in contact with the heating element 142, and can heat the liquid composition. As a result, an aerosol can be generated.

[0064] For example, the vaporizer 140 can also be referred to as a cartomizer or an atomizer, but is not limited thereto.

[0065] The air flow path 160 is a path through which the air flow can move from inside the aerosol generating devices 100a, 100b, 100c. The air flow path 160 can be included or formed inside the housing 101 so that the air flow flows inside the aerosol generating devices 100a, 100b, 100c. For example, the outside air can flow in through at least one through-hole formed in the aerosol generating devices 100a, 100b, 100c and can be discharged to the outside of the aerosol generating devices 100a, 100b, 100c.

[0066] The air flow path 160 can extend from the first through hole 162 located in at least one region of the housing 101, along the inside of the housing 101, and through the second through hole 164 located in another region of the housing 101. When a user inhales through the aerosol generating devices 100a, 100b, 100c, external air flows into the inside of the housing 101 through the first through hole 162, and the inhaled external air can be discharged to the outside of the aerosol generating devices 100a, 100b, 100c through the second through hole 164 together with the aerosol generated inside the aerosol generating devices 100a, 100b, 100c.

[0067] Referring to FIG. 1 again, external air flows into the inside of the housing 101 through the second through hole 164, and the inhaled external air also flows into the inside of the aerosol generating article 200 through at least one hole formed on the surface of the aerosol generating article 200, and is discharged through one end of the aerosol generating article 200 exposed to the outside of the aerosol generating device 100a.

[0068] The first through hole 162 can be formed not only in a hole shape in the housing 101 of the aerosol generating devices 100a, 100b, 100c, but also in the form of a gap partitioned between various members forming the housing 101 of the aerosol generating devices 100a, 100b, 100c.

[0069] As an example, as shown in FIGS. 1 and 2, the second through hole 164 can be formed through the internal space of the aerosol generating devices 100a, 100b into which the aerosol generating article is inserted. As another example, as shown in FIG. 3, the second through hole 164 is also arranged in the mouthpiece 102 that touches the user's mouth for inhalation of the aerosol generating device 100c.

[0070] In FIGS. 1 and 3, a battery 110, a processor 120, and heaters 130a and 130c are arranged in a row, and an air flow path 160 is illustrated as extending from a side surface at one end of the aerosol generation devices 100a and 100c into the internal space of the aerosol generation devices 100a and 100c. In FIG. 2, a vaporizer 140 and a heater 130b are illustrated as arranged in parallel, and the air flow path 160 is illustrated as extending from the side surface of the aerosol generation device 100b along the vaporizer 140 and the internal space of the housing 101.

[0071] However, the internal structures of the aerosol generation devices 100a, 100b, and 100c are not limited to what is shown in FIGS. 1 to 3. In other words, depending on the design of the aerosol generation devices 100a, 100b, and 100c, the arrangements of the battery 110, the processor 120, the heaters 130a, 130b, and 130c, the vaporizer 140, the air flow path 160, and the sensor unit 170 can be changed.

[0072] Note that the aerosol generation devices 100a, 100b, and 100c further include a general configuration in addition to the battery 110, the processor 120, the heaters 130a, 130b, and 130c, the vaporizer 140, the air flow path 160, and the sensor unit 170. For example, the aerosol generation devices 100a, 100b, and 100c may further include a user interface (not shown) and a memory (not shown).

[0073] The user interface can provide the user with information related to the states of the aerosol generating devices 100a, 100b, and 100c. The user interface includes a display or lamp that outputs visual information, a motor that outputs tactile information, a speaker that outputs sound information, input / output (I / O) interfacing means (e.g., buttons or a touch screen) that receives information input by the user or outputs information to the user and performs data communication, or a terminal for receiving charging power, and various interfacing means such as a communication interfacing module that performs wireless communication (e.g., Wi-Fi, WI-FI Direct, Bluetooth®, NFC (near-field communication), etc.) with an external device.

[0074] The memory can store various data processed within the aerosol generating devices 100a, 100b, and 100c, such as the data processed by the processor 120 and the data to be processed. The memory can be implemented by various types such as RAM (random access memory) like DRAM (dynamic random access memory) and SRAM (static random access memory), ROM (read-only memory), and EEPROM (electrically erasable programmable read-only memory).

[0075] Data related to the operating time, maximum puff count, current puff count, at least one temperature profile, and the smoking pattern of the user of the aerosol generating devices 100a, 100b, and 100c can be stored in the memory.

[0076] Also, the aerosol generating devices 100a, 100b, and 100c may include other types of sensors (e.g., a temperature sensor, an aerosol generating article insertion detection sensor, etc.).

[0077] The sensor unit 170 also includes a puff sensor that senses the inhalation of the aerosol generating devices 100a, 100b, and 100c by the user. For example, the puff sensor may be a resistance-based sensor that senses a change in resistance or an inductance-based sensor that senses a change in inductance.

[0078] The sensor unit 170 also includes an inductor. For example, the inductance value of the inductor can be changed by a variable magnetic field applied from the outside. Here, the inductance also means including the effective inductance.

[0079] The sensor unit 170 can sense or measure the airflow flowing inside the aerosol generating devices 100a, 100b, and 100c. The shape of the sensor unit 170 can be deformed by the airflow flowing through the air passage 160 of the aerosol generating devices 100a, 100b, and 100c. The sensor unit 170 outputs an inductance value corresponding to the intensity of the airflow based on the change in the inductance of the inductor, or the inductance value corresponding to the intensity of the airflow sensed by the sensor unit 170 can be transmitted to the processor 120.

[0080] According to FIGS. 1 to 3, the sensor unit 170 is illustrated as being located on the side of the first through hole 162 of the air passage 160, but it can also be located on the side of the second through hole 164. That is, the position of the sensor unit 170 is not limited to the foregoing examples and can be arranged at any position where the airflow flows in the aerosol generating devices 100a, 100b, and 100c. In this way, there is no special restriction on the position where the sensor unit 170 is arranged inside the aerosol generating devices 100a, 100b, and 100c, and a relatively free arrangement or design of the sensor unit 170 is possible. Various embodiments and more detailed descriptions related to the sensor unit 170 will be described later with reference to other drawings.

[0081] The processor 120 is connected to the sensor unit 170, receives information or data sensed by the sensor unit 170, and can sense the performance occurrence of the aerosol generating devices 100a, 100b, and 100c. Here, the connection between the processor 120 and the sensor unit 170 includes both being electrically connected and being connected in such a way that signals can be exchanged through wireless communication or optical signals, magnetic signals, etc.

[0082] The processor 120 measures the inductance value of the inductor included in the sensor unit 170 that changes according to the degree of deformation of the sensor unit 170, and can detect performance if the measured inductance value is maintained above a predetermined critical value for a specified time.

[0083] Here, the specified time is the time that serves as a criterion for determining that performance has occurred, and can correspond to, for example, 0.2 seconds to 2.0 seconds. Also, the predetermined critical value is a value that serves as a criterion for determining that the user's performance has occurred, and can mean, for example, a value compared with the inductance value of the sensor unit 170 that is deformed by the user's inhalation of the aerosol generating devices 100a, 100b, and 100c.

[0084] The specified time and / or the predetermined critical value are also values pre-input to the processor 120 or the memory. For example, the specified time and / or the predetermined critical value are pre-set by the manufacturer of the aerosol generating devices 100a, 100b, and 100c, or are also set to other values by the user after the aerosol generating devices 100a, 100b, and 100c are sold to the user. The performance detection method of the aerosol generating devices 100a, 100b, and 100c will be described in more detail later with reference to FIG. 4.

[0085] In one embodiment, the processor 120 can analyze the results sensed by at least one sensor and control subsequent processing. For example, the processor 120 can output the detected puff in a specified manner. Here, the specified manner can also include at least any one of a visual manner, an auditory manner, and a tactile manner.

[0086] Based on the results sensed by the sensor unit 170, the processor 120 can control the user interface. The user interface can also include a display, an LED, a speaker, a vibration motor, etc. For example, the processor 120 can use a puff sensing sensor to count the number of puffs generated and output the remaining number of puffs via the display.

[0087] Here, the "remaining number of puffs" can mean the remaining number of puffs obtained by subtracting the number of puffs counted by the user so far from the "appropriate number of puffs" predetermined to correspond to characteristics such as the type and size of the aerosol generating article 200, or characteristics such as the type and amount of the substance stored in the liquid storage units 150b and 150c. The appropriate number of puffs can be stored in the memory or the processor 120.

[0088] Also, after counting the number of puffs generated, if the number of puffs reaches a previously specified number, the processor 120 can also notify the user via the user interface that the operation of the aerosol generating devices 100a, 100b, and 100c will end soon.

[0089] In other embodiments, the processor 120 can control the power supplied to the heaters 130a, 130b, 130c such that the operations of the heaters 130a, 130b, 130c are started or terminated based on the results sensed by other types of sensors. Further, the processor 120 can control the amount of power supplied to the heaters 130a, 130b, 130c and the time for which the power is supplied such that the heaters 130a, 130b, 130c are heated to a predetermined temperature or maintain an appropriate temperature based on the results sensed by other types of sensors.

[0090] For example, if the processor 120 detects a puff, it can control the power applied to the heaters 130a, 130b, 130c. In one example, if the processor 120 detects a puff and determines that the user has inhaled from the aerosol generating devices 100a, 100b, 100c, it can preheat the heaters 130a, 130b, 130c. Thereby, aerosol generation can be easily started just by the user inhaling from the aerosol generating devices 100a, 100b, 100c.

[0091] As another example, if the processor 120 detects a puff and determines that the user has inhaled from the aerosol generating devices 100a, 100b, 100c, it can increase the power supplied to the heaters 130a, 130b, 130c and improve the heating temperature. That is, each time the user inhales from the aerosol generating devices 100a, 100b, 100c, the processor 120 can improve the heating temperature of the heaters 130a, 130b, 130c and increase the amount of aerosol generated in accordance with the inhalation timing of the user.

[0092] In yet other embodiments, the processor 120 may detect the performance of the aerosol generating devices 100a, 100b, 100c when the heaters 130a, 130b, 130c are operating. For example, the processor 120 measures the inductance value of the sensor unit 170 only when the heaters 130a, 130b, 130c heat the aerosol generating article inserted into the aerosol generating devices 100a, 100b, 100c, and does not measure the inductance value when the aerosol generating article is not heated.

[0093] As another example, the processor 120 measures the inductance value of the sensor unit 170 only when the heater 130c is operating and heating the liquid composition supplied from the liquid storage unit 150c, and does not measure the inductance value when the heater 130c is not operating.

[0094] That is, the processor 120 measures or does not measure the inductance value of the sensor unit 170 based on whether the heaters 130a, 130b, 130c are operating. Thereby, when the heaters 130a, 130b, 130c are not operating, the processor 120 does not make a judgment regarding the occurrence of puffing, and the power consumption of the aerosol generating devices 100a, 100b, 100c can be saved.

[0095] In yet other embodiments, although the processor 120 constantly measures the inductance value of the sensor unit 170, when the heaters 130a, 130b, 130c are operating, other processes can be performed. For example, the processor 120 determines whether the measured inductance value is maintained above a critical value during a specified time interval only when the heaters 130a, 130b, 130c are operating, and can detect the occurrence of puffing in the aerosol generating devices 100a, 100b, 100c.

[0096] Although not shown in FIGS. 1 to 3, the aerosol generation devices 100a, 100b, and 100c can also form a system together with a separate cradle. For example, the cradle can be used to charge the batteries 110 of the aerosol generation devices 100a, 100b, and 100c. Alternatively, the heaters 130a, 130b, and 130c can also operate when the cradle and the aerosol generation devices 100a, 100b, and 100c are coupled together.

[0097] The aerosol generation devices 100a, 100b, and 100c according to the foregoing embodiments have a substantially rectangular cross-sectional shape in a direction transverse to the longitudinal direction. However, the present embodiment is not limited by the shape of such aerosol generation devices 100a, 100b, and 100c. The aerosol generation devices 100a, 100b, and 100c can have, for example, a circular, elliptical, square, or polygonal cross-sectional shape in various forms. Further, when the aerosol generation devices 100a, 100b, and 100c are extended in the longitudinal direction, they are not necessarily limited to a structure that extends linearly, and can be extended long while being curved in a streamline shape or bent at a predetermined angle in a specific region, for example, for easy handling by the user.

[0098] FIG. 4 is a graph for explaining the performance detection method of the aerosol generation device.

[0099] Referring to FIG. 4, the change in the inductance value L measured by the sensor unit by the processor is illustrated over time. In the graph illustrated in FIG. 4, the horizontal axis corresponds to the time t axis, and the vertical axis corresponds to the inductance value L axis.

[0100] In an initial state where there is no air flow, the inductor included in the sensor unit can have an initial value Lo corresponding to the initial inductance value L. Since the shape of the sensor unit is deformed by the flow of the air flow, the inductance value L can be changed due to, for example, a change in the distance between the inductor and the panel included in the sensor unit.

[0101] For example, if a user inhales an aerosol generating device, at least a part of the sensor unit is deformed by the flow of the air current, and correspondingly, the inductance value L can change. Here, when the inhalation intensity of the user is sufficiently strong, the inductance value L measured by the sensor unit increases to a value greater than the first critical value Th1, and when the inhalation intensity of the user is relatively weak, the inductance value L can increase to a value less than the first critical value Th1.

[0102] During the time that the user's inhalation continues, the inductance value L can be maintained at a predetermined value or more. For example, the measured inductance value L can be maintained at or above the first critical value Th1 during the specified first time interval Δt1. Here, the first time interval Δt1 is an example of the aforementioned specified time and can correspond to 1 second to 2 seconds.

[0103] Note that due to minute vibrations or minute atmospheric pressure differences, a weak air current flow can occur inside the aerosol generating device. At this time, in the sensor unit, even if an inductance value L lower than the first critical value Th1 is measured or an inductance value L equal to or higher than the first critical value Th1 is measured, the change in the inductance L can persist only for a time shorter than the specified time. The processor determines such a change in the measured inductance value L as noise and does not determine that puff has occurred.

[0104] That is, the processor can detect puff for the aerosol generating device by considering both the inhalation intensity of the user and the duration of inhalation. Specifically, the processor does not determine that puff has occurred when only the inhalation intensity is strong or only the inhalation duration is long, and can determine that puff has occurred only when all the conditions related to the inhalation intensity and the inhalation duration are satisfied. Thereby, a puff sensing function that is more robust against noise and has improved sensitivity and accuracy can be realized.

[0105] When the user's inhalation ends, inside the aerosol generating device, the airflow ceases, and the shape of the deformed sensor unit can be restored. Depending on the deformed state of the sensor unit or the deformation pattern of the sensor unit, the inductance value L can be attenuated between a maximum value and a minimum value smaller than the initial value Lo and converge to the initial value Lo.

[0106] In the example illustrated in FIG. 4, the sensor unit vibrates and is restored to a state where there is no airflow, and the inductance value L changes correspondingly between a first critical value Th1 and a value smaller than the initial value Lo and can converge to the initial value Lo.

[0107] Specifically, the inductance value L of the deformed sensor unit increases to a value higher than the first critical value Th1, and when the user's inhalation ends, it can be reduced to a value smaller than the initial value Lo. Thereby, the inductance value L can oscillate and decay between the measured maximum value and a minimum value smaller than the initial value Lo.

[0108] Note that in FIG. 4, the inductance value L is shown to increase and decrease linearly, but this is merely an example, and it can increase and decrease non-linearly depending on the user's inhalation pattern (e.g., inhalation intensity) for the aerosol generating device and / or the characteristics of the sensor unit (e.g., shape, structure), etc.

[0109] In other embodiments, the processor can detect a puff if the inductance value L is maintained above or below a specified value for a specified time after being maintained above the first critical value Th1 for a first time interval Δt1.

[0110] For example, if the inductance value L is maintained at or above a first threshold value Th1 during a first time interval Δt1 and then at or above a second threshold value Th2 during a second time interval Δt2, the processor determines that the user's puff has occurred and can detect the puff. Here, the second threshold value Th2 is smaller than the first threshold value Th1, and the second time interval Δt2 is shorter than the first time interval Δt1. For example, the first time interval Δt1 can be 1 second to 2 seconds, and the second time interval Δt2 can correspond to 0.1 second to 0.2 seconds.

[0111] In this way, after measuring the increased inductance value L maintained by the user's inhalation having sufficient strength and intensity, the processor can further consider the process in which the inductance value L is restored and detect the puff. Thereby, the processor can consider not only the start of the user's inhalation but also the end of the user's inhalation, and more accurate puff detection is possible.

[0112] In addition, if, in addition to the condition that the inductance value L is maintained at or above the second threshold value Th2 during the second time interval Δt2, it is then maintained at or above a third threshold value Th3 during a third time interval Δt3, the processor determines that the user's puff has occurred and can also detect the puff.

[0113] In the following, with reference to FIGS. 5A to 9B, specific examples of the inductor and the sensor unit will be described.

[0114] FIG. 5A is a drawing showing one aspect of a sensor unit including an inductor according to an embodiment, FIG. 5B is a drawing showing another aspect of a sensor unit including an inductor according to an embodiment, and FIG. 5C is a drawing showing still another aspect of a sensor unit including an inductor according to an embodiment.

[0115] Referring to FIGS. 5A to 5C, the sensor unit 170 also includes an inductor 174, a panel 175 deformed by an air flow, and a base 172 on which the inductor 174 and the panel 175 are arranged. Here, the panel 175 and / or the base 172 are deformed by the air flow, and the inductance of the inductor 174 can change corresponding to the deformation of the panel 175 and / or the base 172. Although not shown, the sensor unit 170 can be connected to a processor (e.g., the processor 120 (FIGS. 1 to 3)) to transmit and receive electrical signals, or can be connected to a battery (e.g., the battery 110 (FIGS. 1 to )) to be supplied with power.

[0116] Here, the meaning of "the inductor and the panel are arranged on the base" can include that the inductor 174 is arranged on the base 172, but the inductor 174 is arranged so as to correspond to the deformation of the panel 175 and / or the base 172 and the inductance is changed. For example, the inductor 174 can be mounted on the surface of the base 172 or embedded inside, and the panel 175 can be arranged at a predetermined interval from the inductor 174.

[0117] The base 172 can be made of a material with low rigidity that can be deformed by an air flow, or can be made into a shape with low rigidity. For example, the base 172 can be made to have a thin thickness or cross-sectional area.

[0118] The inductor 174 also includes a metallic substance through which current can flow. For example, the metallic substance includes, but is not limited to, copper, aluminum, nickel, silver, gold, platinum, palladium, or alloys thereof.

[0119] The inductor 174 can be adhered or attached to the base 172 by an adhesive material or coupled to the base 172 by fastening means. Further, the inductor 174 can be disposed on the base 172 by a coating method including methods such as plating, deposit, or spraying, or by a printing method.

[0120] The panel 175 also includes a conductive material in which eddy currents can occur. For example, the panel 175 can include a magnetic metal material (e.g., iron, aluminum). The panel 175 can have a thin thickness so as to be deformed by an air flow and can be made to have a lower rigidity than the base 172.

[0121] If the panel 175 is deformed by an air flow, the distance between the panel 175 and the inductor 174 can change. At this time, based on the change in the distance between the panel 175 and the inductor 174, the inductance of the inductor 174 can change. For example, if the distance between the panel 175 and the inductor 174 through which an alternative current flows changes, eddy currents are generated in the panel 175, and a change in the inductance of the inductor 174 can be induced by the change in the eddy currents.

[0122] In one embodiment, the sensor unit 170 also includes an elastic body 177 disposed between the base 172, the inductor 174, the panel 175, and the inductor 174 and the panel 175. The elastic body 177 can include, for example, a spring or a foam. The inductor 174 is mounted on the base, and the elastic body 177 is disposed between the inductor 174 and the panel 175, and the inductor 174 and the panel 175 can be disposed so as to be separated from each other by a predetermined interval.

[0123] The elastic body 177 separates the panel 175 from the inductor 174, applies a restoring force to the panel 175 deformed by the airflow, and returns the panel 175 to its original position. Thereby, when the airflow flows around the sensor unit 170, the distance between the panel 175 and the inductor 174 is changed, and when the airflow does not flow around the sensor unit 170, the position of the panel 175 can be restored.

[0124] In one embodiment, the inductor 174 also includes a planar coil. The planar coil may be wound in a shape such as a circular spiral, a square spiral, or a triangular spiral, but is not limited thereto. The inductor 174 in the form of a planar coil can be easily mounted on the base 172, and the sensor unit 170 can be miniaturized.

[0125] Referring to FIG. 5A, in the undeformed sensor unit 170, the distance between the inductor 174 and the panel 175 is also the initial distance D0. Referring to FIG. 5B, in the sensor unit 170 deformed by the airflow of the first intensity, the distance between the inductor 174 and the panel 175 is also the first distance D1. Referring to FIG. 5C, in the sensor unit 170 deformed by the airflow of the second intensity stronger than the first intensity, the distance between the inductor 174 and the panel 175 is also the second distance D2.

[0126] At this time, the first distance D1 is narrower than the initial distance D0, and the second distance D2 is even narrower than the first distance D1. That is, the stronger the intensity of the airflow, the greater the deformation of the sensor unit 170, and thereby, the greater the deformation of the panel 175 included in the sensor unit 170, and the distance between the inductor 174 and the panel 175 can be narrowed. As a result, the inductance change of the sensor unit 170 can be shown as a larger value as the intensity of the airflow is stronger.

[0127] FIG. 6 is a drawing showing a sensor unit including a plurality of inductors according to one embodiment.

[0128] Referring to FIG. 6, the sensor unit 170a also includes a plurality of inductors. For example, the sensor unit 170a may include an array in which a plurality of planar coils 174-1, 174-2, 174-3, 174-4,... are arranged. On the base 172a, a plurality of planar coils 174-1, 174-2, 174-3, 174-4,... are arranged at a predetermined interval, corresponding to a deformation of the panel 175a or the base 172a, and the interval between each of the plurality of planar coils 174-1, 174-2, 174-3, 174-4,... and the panel 175a can be changed.

[0129] The inductance changes of each of the plurality of planar coils 174-1, 174-2, 174-3, 174-4,... collected by the sensor unit 170a including the plurality of planar coils 174-1, 174-2, 174-3, 174-4,... are combined together, so that the inductance change in the sensor unit 170a can be sensed more precisely. For example, even if some of the plurality of planar coils 174-1, 174-2, 174-3, 174-4,... included in the sensor unit 170a are damaged, the inductance changes are combined from the remaining planar coils 174-2, 174-3, 174-4,..., and the sensor unit 170a can sense the inductance change required for judging the occurrence of puff.

[0130] As another example, even if only a part of the sensor unit 170a or the panel 175a is locally deformed, the inductance change is combined from at least one of the plurality of planar coils 174-1, 174-2, 174-3, 174-4,..., and the sensor unit 170a can sense the inductance change required for puff detection.

[0131] FIG. 7A is a drawing showing one aspect of a sensor unit according to an embodiment, FIG. 7B is a drawing showing another aspect of a sensor unit according to an embodiment, and FIG. 7C is a drawing showing still another aspect of a sensor unit according to an embodiment.

[0132] Referring to FIGS. 7A to 7C, the sensor unit 170b is disposed in the air flow path 160 and its shape can be deformed by the air flow flowing along the air flow path 160. For example, the base 172b included in the sensor unit 170b is a cantilever beam and can protrude from at least one region of the inner surface 165 of the air flow path 160.

[0133] The cantilever beam-shaped base 172b can be attached to the inner surface 165 of the air flow path 160. For example, the base 172b can be welded, adhered, or joined by fastening means such as bolts to the inner surface 165 of the air flow path 160. As another example, the base 172b can be fitted into a groove formed in the inner surface 165 of the air flow path 160.

[0134] Thus, the sensor unit 170b including the cantilever beam-shaped base 172b can be easily disposed in the air flow path 160. However, the coupling method of the base 172b with the air flow path 160 is not limited thereto, and other methods that can be easily made for the coupling between the air flow path 160 and the sensor unit 170b can be applied.

[0135] Referring to FIG. 7A, when no air flow flows in the air flow path 160, the sensor unit 170b is hardly deformed in shape, and the inductance change due to the change in the distance between the inductor 174b and a panel (not shown) is not sensed. However, referring to FIG. 7B, when a weak air flow flows, the sensor unit 170b is slightly deformed by d1, and the corresponding minute inductance change is sensed. Referring to FIG. 7C, when a strong air flow flows, the sensor unit 170b is deformed by d2, and the corresponding inductance change is sensed.

[0136] The minute deformation d1 of the sensor unit 170b as shown in FIG. 7B is also due to, for example, a fine air flow caused by the vibration of the aerosol generating device or a pressure difference, rather than the inhalation of the user with respect to the aerosol generating device. The inductance value of the inductor included in the sensor unit 170b due to the minute deformation d1 is also a value smaller than the first critical value, and at this time, no puff is detected.

[0137] Note that the deformation d2 of the sensor unit 170b as shown in FIG. 7C is also caused by, for example, a sufficient-intensity inhalation by the user to the aerosol generating device. The inductance value of the inductor included in the sensor unit 170b due to such a deformation d2 is also equal to or greater than the first critical value, and at that time, puff can be detected.

[0138] Although not shown in FIGS. 7A to 7C, a plurality of sensor units 170b can be arranged along the air flow path 160. For example, the sensor unit 170b may include a base 172b with a short length such that it is arranged closer to the outside of the aerosol generating device, and the sensor unit 170b may also include a base 172b with a long length such that it is arranged farther from the outside of the aerosol generating device.

[0139] As the length of the base 172b increases, even if the sensor unit 170b is arranged at a position deep inside the aerosol generating device where the air flow acts relatively weakly, the sensor unit 170b can be sufficiently deformed so that the inductance change required for puff sensing is sensed.

[0140] FIG. 8A is a drawing showing one aspect of a sensor unit according to another embodiment, and FIG. 8B is a drawing showing another aspect of the sensor unit according to another embodiment.

[0141] Referring to FIGS. 8A and 8B, the sensor unit 170c includes a plurality of holes 176 that allow the passage of air flow and can be arranged to cover at least a part of the cross-sectional area of the air flow path 160. Here, the air flow path 160 shown in FIGS. 8A and 8B is also a point of the air flow path 160 shown in FIGS. 1 to 3.

[0142] The base 172c can be a frame on the inner peripheral surface of the air flow path 160 or can be attached along the circumferential direction. For example, the base 172c can be coupled, adhered, or welded along the circumferential direction of the inner peripheral surface of the air flow path 160, but is not limited thereto.

[0143] At least one region of the base 172c is provided with a plurality of holes 176 through which air flow can pass, and an inductor 174c can be arranged in other regions of the base 172. For example, the inductor 174c can be arranged at the central part of the base 172c, and the plurality of holes 176 can be arranged at the edge part of the base 172c.

[0144] The panel 175c is arranged so as to be separated from the inductor 174c by a predetermined interval, but can be positioned avoiding the holes 176 included in the base 172c. Further, the panel 175c is arranged in a direction opposite to the advancing direction of the air flow (for example, the lower part of the base), and can be pressurized by the flow of the air flow.

[0145] Even if at least a part of the air flow path 160 is hidden by the sensor part 170c, since the base 172c includes the plurality of holes 176, a part of the air flow can pass through the plurality of holes 176 and flow along the air flow path 160. Here, the remaining air flow that could not pass through the plurality of holes 176 can apply pressure to the base 172c and cause deformation of the base 172c.

[0146] Referring to FIG. 8A, when no air flow flows through the air flow path 160, the shape of the sensor part 170c is not deformed, and the inductance change due to the change in the distance between the inductor 174c and the panel 175c is not sensed. However, referring to FIG. 8B, when air flow flows through the air flow path 160, the shape of the sensor part 170 is deformed, the distance between the inductor 174c and the panel 175c is changed, and the inductance change is sensed.

[0147] For example, the central part of the base 172c and / or the panel 175c deformed by the air flow becomes convex along the air flow direction, corresponding to the deformation of the base 172c and / or the panel 175c, the distance between the inductor 174c arranged at the central part of the base 172c and the panel 175c is changed, and as a result, the inductance change is sensed by the sensor part 170c.

[0148] Unlike that shown in FIGS. 8A and 8B, the base 172c also includes more holes 176, whereby, even though the sensor part 170c is arranged to cover at least a part of the air flow path 160, the flow of the air flow through the aerosol generating device is smoothed.

[0149] FIG. 9A is a drawing showing an aspect of a sensor part according to yet another embodiment, and FIG. 9B is a drawing showing another aspect of the sensor part according to yet another embodiment.

[0150] Referring to FIGS. 9A and 9B, the aerosol generating device according to yet another embodiment further includes a chamber 166 that branches at a point in the air flow path 160 so that air can flow in and out.

[0151] The chamber 166 is also a separate space in which the sensor part 170d can be arranged and can be located to branch in a direction outward of the air flow path 160 at a point in the air flow path 160. For example, the chamber 166 is also a space formed by expanding the cross section of the air flow path 160 at a point in the air flow path 160. As another example, the chamber 166 is also a separate space connected along a path branched at a point in the air flow path 160.

[0152] By arranging the sensor part 170d in the chamber 166, the sensor part 170d can measure or sense a change in the inductance of the inductor 174d at a position where it does not obstruct the flow of the air flow along the air flow path 160.

[0153] In one embodiment, the base 172d can be arranged to cover at least a portion of the chamber 166. For example, the base 172d can be in the shape of a beam, and both ends of the beam can be attached to the inner wall of the chamber 166 and arranged to cover a part of the cross-sectional area of the chamber 166. As another example, the base 172d can be in the form of a film, attached along the inner wall of the chamber 166, arranged to cover the entire cross-sectional area of the chamber 166, and the inductor 174d can also be included in the film-shaped base 172d.

[0154] The sensor portion 170d arranged on the inner wall of the chamber 166 not only does not interfere with the flow of the air current, but also the sensor portion 170d is firmly fixed to the inner wall of the chamber 166, and the structural stability of the sensor portion 170d can be improved.

[0155] Referring to FIG. 9A, when no air current flows through the air flow path 160, the shape of the sensor portion 170d is not deformed and no inductance change is sensed. However, referring to FIG. 9B, when an air current flows through the air flow path 160, the shape of the sensor portion 170d is deformed and an inductance change is sensed.

[0156] For example, a part of the air current formed by the user's inhalation forms a negative pressure in the chamber 166, deforming the base 172d. Correspondingly, the distance between the inductor 174d and the panel changes, and as a result, the inductance of the inductor 174d can be changed.

[0157] FIG. 10 is a flowchart showing a method of operating an aerosol generating device according to one embodiment.

[0158] Referring to FIG. 10, the method of operating an aerosol generating device according to one embodiment includes steps that are processed in chronological order in the aerosol generating devices 100a, 100b, 100c illustrated in FIGS. 1 to 3. Therefore, even if the content omitted below is considered, with respect to the aerosol generating devices 100a, 100b, 100c in FIGS. 1 to 3, the content described above can also be applied to the method in FIG. 10.

[0159] In stage 1010, the processor can measure the inductance value via the sensor unit. Here, the sensor unit includes an inductor and its shape can be deformed by the airflow flowing through the air passage.

[0160] The processor can measure the inductance value of the inductor included in the sensor unit at predetermined time intervals. For example, the processor can measure and / or record the inductance value of the inductor included in the sensor unit every 0.01 seconds. Also, the processor can utilize the recorded inductance value to generate a graph (e.g., the graph in Figure 4) or a trend line indicating the change in the inductance value over time.

[0161] According to a further embodiment, in the stage of measuring the inductance value, the processor can determine the operation state of the heater that heats the aerosol generating substance, and if it is determined that the heater is operating, the inductance value can be measured. Thereby, the processor can prevent power waste caused by continuously measuring and / or recording the inductance value when the heater is not operating.

[0162] In stage 1020, if the measured inductance value is maintained above a first critical value during a first time interval, the processor can detect a puff. For example, if the inductance value is maintained at a value large enough to be considered due to the user's inhalation of the aerosol generating device for a specified time, the processor can determine that the user's inhalation has occurred and detect a puff.

[0163] Specifically, in stage 1010, the processor can determine that the user's inhalation has occurred and detect a puff via the data related to the inductance value at the time of measurement or recording, if the inductance value is maintained above the critical value for a specified time.

[0164] In other embodiments, the processor may detect a puff if the measured inductance value is maintained above a first threshold value during a first time interval and then maintained above a second threshold value during a second time interval. Here, the second time interval is shorter than the first time interval, and the second threshold value is smaller than the first threshold value.

[0165] In this way, by further considering not only the starting process of inhalation in which the inductance value increases or is maintained, but also the ending process of inhalation in which the inductance value is restored, the processor can implement a more accurate puff detection function.

[0166] According to a further embodiment, at the stage of detecting a puff, the processor may determine the operation state of a heater that heats the aerosol generating substance, and if it is determined that the heater is operating, the processor may detect a puff. Thereby, when the heater is not operating, the processor can prevent power waste caused by continuously processing the process of detecting a puff.

[0167] In still another embodiment, the processor can output the detected puff in a specified manner. The specified manner may also include at least one of a visual manner, an auditory manner, and a tactile manner. The processor can control the user interface and output the detected puff.

[0168] For example, the processor can display the detected number of puffs on a display. As another example, when the remaining number of puffs reaches a specified number, the processor can output a speaker notification or control the vibration motor to vibrate.

[0169] One embodiment may also be embodied in the form of a recording medium including computer-executable instructions such as program modules executed by a computer. A computer-readable medium is also any available medium that can be accessed by a computer, including both volatile and non-volatile media, removable and non-removable media. Also, a computer-readable medium includes both computer storage media and communication media. The computer storage media includes volatile and non-volatile, removable and non-removable media embodied by any method or technology for the storage of information such as computer-readable instructions, data structures, program modules, or other data. The communication media typically includes modulated data signals such as computer-readable instructions, data structures, program modules, or other data, or other transmission mechanisms, and includes any information delivery media.

[0170] Those of ordinary skill in the art in the technical field related to this embodiment will be able to understand that it can be embodied in a modified form within the scope that does not deviate from the essential characteristics of the foregoing description. Therefore, the disclosed method should be considered from an illustrative rather than a limiting perspective. All differences within the equivalent scope should be construed as being included in the present invention.

Claims

1. A housing including an air flow path, a sensor unit including an inductor, the shape of which is deformed based on an air flow flowing through the air flow path, and a processor connected to the sensor unit, wherein the processor measures an inductance value of the inductor that changes according to a degree of deformation of the sensor unit, detects a puff based on the measured inductance value that is maintained above a first critical value during a first time interval and then maintained above a second critical value during a second time interval, the second critical value being smaller than the first critical value, and the second time interval being shorter than the first time interval, an aerosol generating device.

2. Further including a user interface, wherein the processor controls the user interface to output a display of the detected puff to the user, the aerosol generating device according to Claim 1.

3. The user interface is configured to output a display in a visual, auditory, or tactile manner, the aerosol generating device according to Claim 2.

4. Further including a heater for heating an aerosol generating substance, wherein the processor controls the power applied to the heater based on detecting the puff, the aerosol generating device according to Claim 1.

5. Further including a heater for heating an aerosol generating substance, wherein the processor detects the puff when the heater is operating, the aerosol generating device according to Claim 1.

6. The sensor unit includes a panel deformed by an air flow and a base on which the panel and the inductor are arranged, wherein the inductance of the inductor changes corresponding to deformation of at least one of the panel and the base, the aerosol generating device according to Claim 1.

7. The base is a cantilever beam protruding from an inner surface of the air flow path, the aerosol generating device according to Claim 6.

8. The base includes a plurality of holes allowing passage of an air flow and is arranged to cover at least a part of the air flow path, the aerosol generating device according to Claim 6.

9. Further including a chamber branched at a point in the air flow path so that an air flow can enter and exit, wherein the sensor unit is arranged in the chamber, the aerosol generating device according to Claim 6.

10. ​ The aerosol generating device according to claim 9, wherein the base is arranged to cover at least a part of the chamber.

11. The aerosol generating device according to claim 1, wherein the inductor includes a planar coil.

12. The aerosol generating device according to claim 1, wherein the sensor unit includes an array in which a plurality of planar coils are arranged.

13. Measuring an inductance value through a sensor unit of an aerosol generating device including an inductor and deforming in shape based on an air flow flowing through an air flow path; Detecting puff based on the measured inductance value maintained above a first critical value during a first time interval and then maintained above a second critical value during a second time interval, wherein the second critical value is smaller than the first critical value, and the second time interval is shorter than the first time interval, a method of operating an aerosol generating device.

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