Aerosol Generator

Abstract

An aerosol generating device is disclosed. The aerosol generating device may include a chamber for storing liquid, a heater for heating the liquid, a resistance detection sensor for outputting a signal corresponding to a resistance value of the heater, and a control unit for calculating a temperature of the heater based on the resistance value of the heater. The control unit may determine whether a temperature of the heater exceeds a first temperature in response to a supply of a predetermined sensing power to the heater in a first preheating section, and if the temperature of the heater is equal to or lower than the first temperature, control the heater to be supplied with a first amount of power in a heating section after the first preheating section, and if the temperature of the heater exceeds the first temperature, control the heater to be supplied with a second amount of power lower than the first amount of power in the heating section, and if the temperature of the heater exceeds the first temperature, determine whether a temperature of the heater exceeds a second temperature higher than the first temperature in response to a supply of the sensing power to the heater in a second preheating section after the heating section, and if the temperature of the heater exceeds the second temperature, determine that the liquid is exhausted.

Description

[Technical field]

[0001] The present disclosure relates to an aerosol generating device. [Background technology]

[0002] The aerosol generating device is for extracting a predetermined component from a medium or substance via an aerosol. The medium may contain a substance having a variety of components. The substance contained in the medium may be a flavoring substance having a variety of components. For example, the substance contained in the medium may contain a nicotine component, a herb component, and / or a coffee component. In recent years, much research has been conducted on such aerosol generating devices. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure is directed to solving the above-referenced problems and other problems.

[0004] Another object of the present disclosure is to provide an aerosol generating device that can determine whether a liquid aerosol generating material is being smoothly supplied to a liquid transfer means based on the temperature of a heater in a preheating section.

[0005] It is still another object of the present disclosure to provide an aerosol generating device that can smoothly supply aerosol generating material to a liquid transmitting means when the liquid transmitting means is short of liquid aerosol generating material.

[0006] It is still another object of the present disclosure to provide an aerosol generating device that can accurately determine whether a liquid aerosol generating material has been consumed based on the temperature of a heater in a preheating section. [Means for solving the problem]

[0007] In order to achieve the above object, an aerosol generating device according to an aspect of the present disclosure may include a chamber for storing a liquid, a heater for heating the liquid, a resistance detection sensor for outputting a signal corresponding to a resistance value of the heater, and a control unit for calculating a temperature of the heater based on the resistance value of the heater. The control unit may determine whether a temperature of the heater exceeds a first temperature in a first preheating period in response to a supply of a predetermined sensing power to the heater, and if the temperature of the heater is equal to or lower than the first temperature, control the heater to be supplied with a first amount of power in a heating period after the first preheating period, and if the temperature of the heater exceeds the first temperature, control the heater to be supplied with a second amount of power lower than the first amount of power in the heating period, and if the temperature of the heater exceeds the first temperature, determine whether a temperature of the heater exceeds a second temperature higher than the first temperature in a second preheating period after the heating period in response to a supply of the sensing power to the heater, and if the temperature of the heater exceeds the second temperature, determine that the liquid is exhausted. Effect of the Invention

[0008] According to at least one of the embodiments of the present disclosure, it is possible to determine whether the liquid aerosol generating material is smoothly supplied to the liquid transfer means based on the temperature of the heater in the preheating section.

[0009] According to at least one of the embodiments of the present disclosure, when the liquid transmitting means is short of liquid aerosol generating substance, the aerosol generating substance can be smoothly supplied to the liquid transmitting means.

[0010] According to at least one of the embodiments of the present disclosure, it is possible to accurately determine whether the liquid aerosol generating material has been consumed based on the temperature of the heater in the preheating section.

[0011] Further scope of applicability of the present disclosure will become apparent from the following detailed description. However, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only, since various changes and modifications within the spirit and scope of the present disclosure will be apparent to those skilled in the art.

[0012] The above and other objects, features and other characteristics of the present disclosure will become apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a block diagram of an aerosol generating device according to one embodiment of the present disclosure. [Diagram 2] FIG. 1 illustrates an aerosol generating device according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 illustrates an aerosol generating device according to an embodiment of the present disclosure. [Figure 4] FIG. 1 illustrates an aerosol generating device according to an embodiment of the present disclosure. [Diagram 5] FIG. 1 illustrates a stick according to an embodiment of the present disclosure. [Figure 6] FIG. 1 illustrates a stick according to an embodiment of the present disclosure. [Figure 7] FIG. 1 is a diagram illustrating a configuration of an aerosol generating device according to an embodiment of the present disclosure. [Figure 8a] 1 is a flowchart illustrating a method of operating an aerosol generating device according to one embodiment of the present disclosure. [Figure 8b] 1 is a flowchart illustrating a method of operating an aerosol generating device according to one embodiment of the present disclosure. [Figure 8c] 1 is a flowchart illustrating a method of operating an aerosol generating device according to one embodiment of the present disclosure. [Figure 9] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. [Figure 10] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. [Figure 12] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. [Figure 13] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. [Figure 14] FIG. 2 is a diagram illustrating the operation of an aerosol generating device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. The same reference numerals are given to the same or similar components even if they are illustrated in different drawings, and redundant description thereof will be omitted.

[0015] The suffixes "module" and "section" for components used in the following description are used only for ease of description of the specification. "Module" and "section" do not have different meanings or roles from each other.

[0016] In addition, in the following description of the embodiments disclosed in this specification, if a specific description of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description will be omitted. In addition, the attached drawings are provided to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings. Therefore, the attached drawings should be interpreted as including all modifications, equivalents, and alternatives included in the idea and scope of the present disclosure.

[0017] Terms including ordinal numbers such as first, second, etc. may be used to describe various components, but it should be understood that the components are not limited by the terms, and the terms are used only to distinguish one component from another.

[0018] When an element is said to be "connected" to another element, it will be understood that there can be other elements in between, whereas when an element is said to be "directly connected" to another element, it will be understood that there are no other elements in between.

[0019] The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0020] FIG. 1 is a block diagram of an aerosol generating device according to one embodiment of the present disclosure.

[0021] Referring to FIG. 1, the aerosol generation device 10 may include a communication interface 11, an input / output interface 12, an aerosol generation module 13, a memory 14, a sensor module 15, a battery 16, and / or a control unit 17.

[0022] In one embodiment, the aerosol generating device 10 may be composed of only a main body. In this case, the components included in the aerosol generating device 10 may be located in the main body. In another embodiment, the aerosol generating device 10 may be composed of a cartridge that stores an aerosol generating material and a main body. In this case, the components included in the aerosol generating device 10 may be located in at least one of the main body and the cartridge.

[0023] The communication interface 11 may include at least one communication module for communication with an external device and / or a network. For example, the communication interface 11 may include a communication module for wired communication such as a universal serial bus (USB). For example, the communication interface 11 may include a communication module for wireless communication such as wireless fidelity (WiFi), Bluetooth (registered trademark), Bluetooth (registered trademark) low power (BLE), Zigbee (registered trademark), near field communication (NFC), etc.

[0024] The input / output interface 12 may include an input device that receives commands from a user and / or an output device that outputs information to a user. For example, the input device may include a touch panel, a physical button, a microphone, etc. For example, the output device may include a display device that outputs visual information such as a display, a light emitting diode (LED), an audio device that outputs auditory information such as a speaker or a buzzer, a motor that outputs tactile information such as a haptic effect, etc.

[0025] The input / output interface 12 can transmit data corresponding to commands input by a user via the input device to other components (and the like) of the aerosol generating device 10. The input / output interface 12 can output information corresponding to data received from other components (and the like) of the aerosol generating device 10 via the output device.

[0026] The aerosol generating module 13 can generate an aerosol from an aerosol generating material. Here, the aerosol generating material can be any one of a variety of materials capable of generating an aerosol, such as a liquid material, a solid material, a gel material, or a combination of two or more materials.

[0027] The liquid aerosol generating material may be a liquid containing a tobacco-containing material, including volatile tobacco flavor components, according to one embodiment. The liquid aerosol generating material may be a liquid containing a non-tobacco material, according to another embodiment. For example, the liquid aerosol generating material may include water, solvent, nicotine, botanical extracts, flavors, flavorings, vitamin mixtures, and the like.

[0028] The solid-state aerosol-generating material may include solid materials based on tobacco raw materials such as reconstituted tobacco sheets, shredded tobacco, and granulated tobacco. The solid-state aerosol-generating material may also include solid materials containing taste modifiers, seasonings, and the like. For example, taste modifiers may include calcium carbonate, sodium bicarbonate, calcium oxide, and the like. For example, seasonings may include natural materials such as herb granules, silica containing fragrance ingredients, zeolite, dextrin, and the like.

[0029] Additionally, the aerosol generating material may further include an aerosol forming agent such as glycerin or propylene glycol.

[0030] The aerosol generation module 13 can include at least one heater.

[0031] The aerosol generation module 13 can include an electrical resistive heater. For example, the electrical resistive heater can include at least one electrically conductive track and can be heated by passing an electric current through the electrically conductive track. Here, the aerosol generating material can be heated by the heated electrical resistive heater.

[0032] The electrically conductive track may comprise an electrically resistive material. As an example, the electrically conductive track may be made of a metallic material. As another example, the electrically conductive track may be made of a ceramic material, carbon, a metal alloy, or a composite of a ceramic material and a metal.

[0033] The electrical resistive heater may include an electrically conductive track formed in a variety of shapes, for example, the electrically conductive track may be formed in any one of a tube, a plate, a needle, a rod, and a coil.

[0034] The aerosol generating module 13 may include a heater using an induction heating method. For example, an induction heater may include an electric conductive coil, and an alternating magnetic field whose direction changes periodically may be generated by adjusting a current flowing through the electric conductive coil. Here, when an alternating magnetic field is applied to a magnetic material, energy loss due to eddy current loss and hysteresis loss may occur in the magnetic material, and the lost energy may be released as thermal energy to heat the aerosol generating material adjacent to the magnetic material. Here, the object that generates heat due to the magnetic field may be called a susceptor.

[0035] On the other hand, the aerosol generation module 13 can also generate an aerosol from an aerosol-generating substance by generating ultrasonic vibrations.

[0036] The aerosol generating module 13 may be referred to as a cartomizer, an atomizer, a vaporizer, or the like.

[0037] The memory 14 can store programs for each signal processing and control within the control unit 17, and can store data processed by the control unit 17 and data to be processed.

[0038] For example, memory 14 can store application programs designed to perform various tasks that can be processed by control unit 17, and can selectively provide some of the stored application programs upon request of control unit 17.

[0039] For example, the memory 14 may store the operating time of the aerosol generating device 10, the maximum number of puffs, the current number of puffs, the number of times the battery 16 has been charged, the number of times the battery 16 has been discharged, at least one temperature profile, data on the user's inhalation pattern, data on charging and discharging, etc. Here, a puff may refer to a user's inhalation, and inhalation may be a situation in which the user inhales into the user's oral cavity, nasal cavity, or lungs through the mouth or nose.

[0040] The memory 14 may include at least one of a volatile memory (e.g., DRAM, SRAM, SDRAM, etc.) and a non-volatile memory (e.g., a flash memory, a hard disk drive (HDD), a solid-state drive (SSD), etc.).

[0041] The sensor module 15 may include at least one sensor.

[0042] For example, the sensor module 15 may include a sensor for detecting a puff (hereinafter, referred to as a puff sensor). Here, the puff sensor may be implemented by a proximity sensor such as an IR sensor, a pressure sensor, a gyro sensor, an acceleration sensor, a magnetic field sensor, or the like.

[0043] For example, the sensor module 15 may include a sensor for detecting a puff (hereinafter, referred to as a puff sensor). Here, the puff sensor may be implemented by a pressure sensor, a gyro sensor, an acceleration sensor, a magnetic field sensor, or the like.

[0044] For example, the sensor module 15 may include a sensor (hereinafter, referred to as a temperature sensor) for detecting the temperature of a heater included in the aerosol generation module 13, the temperature of an aerosol generating material, etc. Here, the heater included in the aerosol generation module 13 may also function as a temperature sensor. For example, the electrically resistive material of the heater may be a material having a temperature coefficient of resistance. The sensor module 15 may sense the temperature of the heater by measuring the resistance of the heater, which changes depending on the temperature.

[0045] For example, if a stick can be inserted into the main body of the aerosol generation device 10, the sensor module 15 can include a sensor that detects the insertion of the stick (hereinafter referred to as a stick detection sensor).

[0046] For example, in the case where the aerosol generation device 10 includes a cartridge, the sensor module 15 may include a sensor (hereinafter referred to as a cartridge detection sensor) that detects the attachment / detachment, position, etc. of the cartridge relative to the main body.

[0047] Here, the stick detection sensor and / or the cartridge detection sensor may be implemented using an inductance-based sensor, a capacitance-type sensor, a resistance sensor, a hall sensor (hall IC) using the hall effect, or the like.

[0048] For example, the sensor module 15 may include a voltage sensor that detects the voltage applied to a component (e.g., battery 16) provided in the aerosol generating device 10 and / or a current sensor that detects the current.

[0049] The battery 16 can supply power used for the operation of the aerosol generation device 10 under the control of the control unit 17. The battery 16 can supply power to other components provided in the aerosol generation device 10. For example, the battery 16 can supply power to a communication module included in the communication interface 11, an output device included in the input / output interface 12, a heater included in the aerosol generation module 13, etc.

[0050] The battery 16 may be a rechargeable battery or a disposable battery. For example, the battery 16 may be, but is not limited to, a lithium ion battery or a lithium polymer battery. For example, if the battery 16 is rechargeable, the charge rate (C-rate) of the battery 16 may be, but is not limited to, 10C and the discharge rate (C-rate) of the battery 16 may be, but is not limited to, 10C to 20C. For stable use, the battery 16 may be manufactured to ensure 80% or more of its total capacity even after 2000 charge / discharge cycles.

[0051] The aerosol generating device 10 may further include a protection circuit module (PCM), which is a circuit for protecting the battery 16. The protection circuit module (PCM) may be disposed adjacent to an upper surface of the battery 16. For example, in order to prevent overcharging and overdischarging of the battery 16, the protection circuit module (PCM) may cut off an electric path to the battery 16 when a short circuit occurs in a circuit connected to the battery 16, when an overvoltage is applied to the battery 16, when an overcurrent flows through the battery 16, etc.

[0052] The aerosol generating device 10 may further include a charging terminal to which power supplied from an external source is input. For example, a charging terminal is formed on one side of the body of the aerosol generating device 10, and the aerosol generating device 10 may charge the battery 16 using power supplied through the charging terminal. Here, the charging terminal may be a wired terminal for USB communication, a pogo pin, or the like.

[0053] The aerosol generating device 10 may include a power terminal (not shown) to which power supplied from an external source is input. For example, a power line may be connected to the power terminal disposed on one side of the body of the aerosol generating device 100. The aerosol generating device 10 may charge the battery 16 using power supplied through the power line connected to the power terminal. Here, the power terminal may be a wired terminal for USB communication.

[0054] The aerosol generation device 10 can also wirelessly receive power supplied from an external source via the communication interface 11. For example, the aerosol generation device 10 can receive power wirelessly using an antenna included in a communication module for wireless communication, and can charge the battery 16 using the wirelessly supplied power.

[0055] The control unit 17 can control the overall operation of the aerosol generation device 10. The control unit 17 is connected to each component provided in the aerosol generation device 10, and can transmit and / or receive signals between each component to control the overall operation of each component.

[0056] The control unit 17 may include at least one processor and may use the processor to control the overall operation of the aerosol generating device 10. Here, the processor may be a general processor such as a central processing unit (CPU). Of course, the processor may be a dedicated device such as an ASIC or a processor based on other hardware.

[0057] The control unit 17 can perform any one of a plurality of functions of the aerosol generation device 10. For example, the control unit 17 can execute any one of a plurality of functions of the aerosol generation device 10 (e.g., a preheating function, a heating function, a charging function, a cleaning function, etc.) according to the state of each component included in the aerosol generation device 10, a user's command received via the input / output interface 12, etc.

[0058] The control unit 17 can control the operation of each component included in the aerosol generation device 10 based on the data stored in the memory 14. For example, the control unit 17 can control the battery 16 to supply a predetermined amount of power to the aerosol generation module 13 for a predetermined period of time based on data about a temperature profile, a user's inhalation pattern, and the like stored in the memory 14.

[0059] The control unit 17 can determine the occurrence of a puff through a puff sensor included in the sensor module 15. For example, the control unit 17 can check a temperature change, a flow change, a pressure change, a voltage change, etc. in the aerosol generating device 10 based on a sensing value of the puff sensor, and can determine the occurrence of a puff according to the confirmed result based on the sensing value of the puff sensor.

[0060] The control unit 17 can control the operation of each component included in the aerosol generating device 10 depending on the presence or absence of a puff and / or the number of puffs. For example, the control unit 17 can control the heater temperature to be changed or maintained based on the temperature profile stored in the memory 14.

[0061] The control unit 17 can control to cut off the power supply to the heater under a predetermined condition, for example, when the stick is removed and the cartridge is separated, when the number of puffs reaches a preset maximum number of puffs, when no puffs are detected for a preset time or more, when the remaining amount of the battery 16 is less than a preset value, etc.

[0062] The control unit 17 may calculate the remaining amount of power (hereinafter, referred to as the remaining amount) stored in the battery 16. For example, the control unit 17 may calculate the remaining amount of the battery 16 based on the sensing values ​​of a voltage sensor and / or a current sensor included in the sensor module 15.

[0063] The control unit 17 may control the supply of power to the heater using at least one of a pulse width modulation (PWM) method and a proportional-integral-differential (PID) method.

[0064] For example, the control unit 17 can use a PWM method to control a current pulse having a predetermined frequency and duty ratio to be supplied to the heater. Here, the control unit 17 can control the power supplied to the heater by adjusting the frequency and duty ratio of the current pulse.

[0065] For example, the control unit 17 can determine a target temperature to be a control target based on the temperature profile. Here, the control unit 17 can control the power supplied to the heater using a PID method, which is a feedback control method based on a difference between the heater temperature and the target temperature, a value obtained by integrating the difference over time, and a value obtained by differentiating the difference over time.

[0066] Meanwhile, the PWM method and the PID method have been described as examples of control methods for supplying power to the heater, but the present invention is not limited thereto, and various control methods such as a Proportional-Integral (PI) method and a Proportional-Differential (PD) method can be used.

[0067] Meanwhile, the control unit 17 may control the heater to supply power under preset conditions. For example, when a cleaning function for cleaning a space into which the stick is inserted is selected according to a command input by the user via the input / output interface 12, the control unit 17 may control the heater to supply a predetermined amount of power.

[0068] 2 to 4 are diagrams illustrating an aerosol generating device according to an embodiment of the present disclosure.

[0069] According to various embodiments of the present invention, the aerosol generating device 10 can include a body 100 and / or a cartridge 200 .

[0070] Referring to FIG. 2, an aerosol generating device 10 according to one embodiment can include a body 100 supporting a cartridge 200, the cartridge 200 storing an aerosol generating substance.

[0071] According to one embodiment, the cartridge 200 may be configured to be detachably attached to the main body 100. According to another embodiment, the cartridge 200 may be configured integrally with the main body 100. For example, the cartridge 200 may be attached to the main body 100 by inserting at least a portion of the cartridge 200 into an internal space formed by the housing 101 of the main body 100.

[0072] The main body 100 may be formed in a structure that allows external air to flow into the main body 100 when the cartridge 200 is inserted. Here, the external air that has flowed into the main body 100 may flow to the user's mouth through the cartridge 200.

[0073] The control unit 17 may determine whether the cartridge 200 is attached / detached by a cartridge detection sensor included in the sensor module 150. For example, the cartridge detection sensor may transmit a pulse current through one terminal connected to the cartridge 200 and detect whether the cartridge 200 is connected based on whether the pulse current is received through another terminal.

[0074] The cartridge 200 may include a storage section 220 for storing an aerosol generating substance and / or a heater 210 for heating the aerosol generating substance in the storage section 220. For example, a liquid transmission means impregnated (containing) the aerosol generating substance may be disposed inside the storage section 220, and the electrically conductive track of the heater 210 may be formed in a structure that wraps around the liquid transmission means. Here, an aerosol may be generated by heating the liquid transmission means by the heater 210. Here, the liquid transmission means may include a wick made of cotton fiber, ceramic fiber, glass fiber, or porous ceramic.

[0075] The cartridge 200 may include a mouthpiece 225. Here, the mouthpiece 225 is a part that is inserted into the oral cavity of a user, and may include an exhaust hole through which the aerosol is exhausted to the outside during a puff.

[0076] 3, the cartridge 200 may include an insertion space 230 into which the stick 20 can be inserted. For example, the cartridge 200 may include an insertion space 230 formed by an inner wall (not shown) extending in a circumferential direction along a direction in which the stick 20 is inserted. Here, the insertion space 230 may be formed by opening the inside of the inner wall upward and downward. The stick 20 may be inserted into the insertion space 230 formed by the inner wall.

[0077] The insertion space 230 into which the stick 20 is inserted may be formed in a shape corresponding to the shape of a portion of the stick 20 to be inserted into the insertion space 230. For example, if the stick 20 is formed in a cylindrical shape, the insertion space 230 may be formed in a cylindrical shape.

[0078] When the stick 20 is inserted into the insertion space 230, the outer circumferential surface of the stick 20 is surrounded by the inner wall and may come into contact with the inner wall.

[0079] A part of the stick 20 is inserted into the insertion space 230 of the cartridge 200, and the remaining part can be exposed to the outside.

[0080] A user can inhale the aerosol while holding one end of the stick 20 in his / her mouth. The aerosol generated by the first heater 210 can be delivered to the user's mouth through the stick 20. Here, as the aerosol passes through the stick 20, a substance contained in the stick 20 is added to the aerosol, and the aerosol with the added substance can be inhaled into the user's mouth through one end of the stick 20.

[0081] The control unit 17 can monitor the number of puffs based on the sensing value of the puff sensor from the point when the stick 20 is inserted.

[0082] The control unit 17 can initialize the current number of puffs stored in the memory 14 when the inserted stick 20 is removed.

[0083] The cartridge 200 may include a second heater 215 for heating the stick 20. The second heater 215 may be disposed at a position in the cartridge 200 corresponding to the position of the stick 20 when the stick 20 is inserted into the insertion space 230. The second heater 215 may be composed of an electrically conductive heater and / or an induction heating heater. The second heater 215 may heat the inside and / or outside of the stick 20 using power supplied from the battery 16.

[0084] 4, an aerosol generating device 100 according to an embodiment may include a main body 100 supporting a cartridge 200 and a cartridge 200 storing an aerosol generating substance. The main body 100 may be configured so that the stick 20 can be inserted into the insertion space 130.

[0085] The aerosol generating device 100 may include a first heater 210 that heats the aerosol generating material stored in the cartridge 200 and / or a second heater 115 that heats the stick 20 inserted into the main body 100. For example, the aerosol generating device 100 may generate an aerosol by heating the aerosol generating material stored in the cartridge 200 and the stick 20 using the first heater 210 and the second heater 115, respectively.

[0086] The stick 20 may be similar to a typical combustible cigarette. For example, the stick 20 may be divided into a first portion including an aerosol-generating substance and a second portion including a filter or the like. Alternatively, the second portion of the stick 20 may also include an aerosol-generating substance. For example, the aerosol-generating substance formed in the form of granules or capsules may be inserted into the second portion.

[0087] Hereinafter, an embodiment in which the stick 20 is inserted into the insertion space 130 formed in the housing 101 of the main body 100 will be described.

[0088] 5 and 6 are diagrams illustrating a stick according to an embodiment of the present disclosure.

[0089] 5, a cigarette 20 according to one embodiment may include a tobacco rod 21 and a filter rod 22. The first portion described above with reference to FIG. 4 may include the tobacco rod 21. The second portion described above with reference to FIG. 4 may include the filter rod 22.

[0090] Although the filter rod 22 is shown as a single segment in FIG. 5, 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 first segment that cools the aerosol and a second segment that filters a predetermined component contained in the aerosol. In addition, the filter rod 22 may further include at least one segment that performs another function, if necessary.

[0091] The stick 20 may have a diameter in the range of 5 mm to 9 mm and a length of about 48 mm, but is not limited thereto. For example, the tobacco rod 21 may have a length of about 12 mm, the first segment of the filter rod 22 may have a length of about 10 mm, the second segment of the filter rod 22 may have a length of about 14 mm, and the third segment of the filter rod 22 may have a length of about 12 mm, but is not limited thereto.

[0092] The stick 20 may be wrapped by at least one wrapper 24. The wrapper 24 may have at least one hole through which external air can flow in or internal gas can flow out. As an example, the stick 20 may be wrapped by one wrapper 24. As another example, the stick 20 may be wrapped by two or more wrappers 24 stacked on top of each other. For example, the tobacco rod 21 may be wrapped by a first wrapper 241. For example, the filter rod 22 may be wrapped by wrappers 242, 243, and 244. The tobacco rod 21 and the filter rod 22 wrapped by individual wrappers may be combined, and the entire stick 20 may be further wrapped by a third wrapper. When each filter rod 22 is composed of a plurality of segments, each segment may be wrapped by an individual wrapper 242, 243, and 244. The entire stick 20, in which the segments wrapped by the individual wrappers are combined, may be further wrapped by another wrapper.

[0093] The first wrapper 241 and the second wrapper 242 may be made of a general filter wrapper. For example, the first wrapper 241 and the second wrapper 242 may be a porous wrapper or a non-porous wrapper. Also, the first wrapper 241 and the second wrapper 242 may be made of oil-resistant paper and / or aluminum laminate wrapper.

[0094] The third wrapper 243 may be made of hard wrapping paper. For example, the basis weight of the third wrapper 243 may be in the range of 88 g / m2 to 96 g / m2. For example, the basis weight of the third wrapper 243 may be in the range of 90 g / m2 to 94 g / m2. Also, the thickness of the third wrapper 243 may be in the range of 120 μm to 130 μm. For example, the thickness of the third wrapper 243 may be 125 μm.

[0095] The fourth wrapper 244 may be made of a grease-resistant hard wrapper. For example, the basis weight of the fourth wrapper 244 may be in the range of 88 g / m2 to 96 g / m2. For example, the basis weight of the fourth wrapper 244 may be in the range of 90 g / m2 to 94 g / m2. Also, the thickness of the fourth wrapper 244 may be in the range of 120 μm to 130 μm. For example, the thickness of the fourth wrapper 244 may be 125 μm.

[0096] The fifth wrapper 245 may be made of a sterilized paper (MFW). Here, the sterilized paper (MFW) may be a paper that is 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 in the range of 57 g / m2 to 63 g / m2. For example, the basis weight of the fifth wrapper 245 may be 60 g / m2. 2 The thickness of the fifth wrapper 245 may be in the range of 64 μm to 70 μm. For example, the thickness of the fifth wrapper 245 may be 67 μm.

[0097] The fifth wrapper 245 may include a predetermined material. Here, an example of the predetermined material may be, but is not limited to, silicon. For example, silicon may have properties such as heat resistance, which is less susceptible to change with temperature, oxidation resistance, resistance to various chemicals, water repellency, and electrical insulation. However, any material other than silicon that has the above-mentioned properties may be applied or coated onto the fifth wrapper 245 without any restrictions.

[0098] The fifth wrapper 245 can prevent the stick 20 from burning. For example, when the tobacco rod 21 is heated by the heater 210, the stick 20 may burn. Specifically, when the temperature rises above the flash point of any one of the materials contained in the tobacco rod 21, the stick 20 may burn. Even in such a case, the fifth wrapper 245 contains a non-flammable material, and therefore can prevent the stick 20 from burning.

[0099] In addition, the fifth wrapper 245 can prevent the main body 100 from being contaminated by a substance produced in the stick 20. A liquid substance can be produced in the stick 20 by the user's puff. For example, a liquid substance (e.g., moisture) can be produced as the aerosol produced in the stick 20 is cooled by the outside air. The fifth wrapper 245 wraps the stick 20, thereby preventing the liquid substance produced in the stick 20 from leaking out of the stick 20.

[0100] The tobacco rod 21 may include 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. The tobacco rod 21 may also include other additives, such as flavoring agents, humectants, and / or organic acids. A flavoring liquid, such as menthol or a humectant, may be added to the tobacco rod 21 by being sprayed onto the tobacco rod 21.

[0101] The tobacco rod 21 can be manufactured in various ways. For example, the tobacco rod 21 can be manufactured from a sheet. For example, the tobacco rod 21 can be manufactured from a strand. For example, the tobacco rod 21 can be manufactured from a small piece obtained by cutting a tobacco sheet into small pieces. For example, the tobacco rod 21 can be surrounded by a thermally conductive material. For example, the thermally conductive material can be a metal foil such as aluminum foil, but is not limited thereto. For example, the thermally conductive material surrounding the tobacco rod 21 can uniformly distribute the heat transferred to the tobacco rod 21 and improve the thermal conductivity to the tobacco rod. Therefore, the tobacco taste can be improved. The thermally conductive material surrounding the tobacco rod 21 can function as a susceptor heated by an induction heater. Although not shown in the drawings, the tobacco rod 21 can further include an additional susceptor in addition to the thermally conductive material surrounding the outside.

[0102] The filter rod 22 may be a cellulose acetate filter. Meanwhile, the shape of the filter rod 22 is not limited. For example, the filter rod 22 may be a cylindrical type rod. For example, the filter rod 22 may be a tube type rod having a hollow inside. For example, the filter rod 22 may be a recess type rod. When the filter rod 22 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured into another shape.

[0103] The first segment of the filter rod 22 may be a cellulose acetate filter. For example, the first segment may be a tube-shaped structure having a hollow inside. When the heater 110 is inserted, the first segment can prevent the inner material of the tobacco rod 21 from being pushed backward, and can also provide a cooling effect for the aerosol. The diameter of the hollow 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.

[0104] The length of the first segment may be an appropriate length within the range of 4 mm to 30 mm, but is not limited thereto. For example, the length of the first segment may be 10 mm, but is not limited thereto.

[0105] The second segment of the filter rod 22 cools the aerosol generated by the heater 110 heating the tobacco rod 21. Thus, the user can inhale the aerosol that has been cooled to an appropriate temperature.

[0106] The length or diameter of the second segment may be determined in various ways depending on the shape of the stick 20. For example, the length of the second segment may be appropriately adopted within the range of 7 mm to 20 mm. Preferably, the length of the second segment may be about 14 mm, but is not limited thereto.

[0107] The second segment can be made by weaving polymeric fibers, in which case the flavor liquid can be applied to the fibers made from the polymer, or the second segment can be made by weaving together the fibers made from the polymer with separate fibers that have been coated with the flavor liquid, or the second segment can be formed from a crimped polymer sheet.

[0108] For example, the polymer may be made from 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.

[0109] The second segment may be formed from woven polymer fibers or a crimped polymer sheet, such that the second segment may include one or more longitudinally extending channels, where the channels may be passageways through which a gas (e.g., air or aerosol) may pass.

[0110] For example, the second segment of crimped polymer sheet may be formed from a material having a thickness between about 5 μm and about 300 μm, such as between about 10 μm and about 250 μm, and the total surface area of ​​the second segment may be less than about 300 mm 2 / mm and about 1000mm 2 / mm. Also, the aerosol cooling element may have a specific surface area of ​​about 10 mm 2 / mg and about 100mm 2 / mg of material.

[0111] Meanwhile, the second segment can include a thread containing a volatile flavor component, which can be, but is not limited to, menthol. For example, the thread can be loaded with a sufficient amount of menthol to provide 1.5 mg or more of menthol to the second segment.

[0112] The third segment of the filter rod 22 may be a cellulose acetate filter. The length of the third segment may be appropriately selected within a range of 4 mm to 20 mm. For example, the length of the third segment may be about 12 mm, but is not limited thereto.

[0113] The filter rod 22 may be manufactured to generate a flavor. For example, a flavoring liquid may be sprayed onto the filter rod 22. For example, a separate fiber coated with a flavoring liquid may be inserted into the filter rod 22.

[0114] The filter rod 22 may also include at least one capsule 23. Here, the capsule 23 may function to generate flavor. The capsule 23 may also function to generate aerosol. For example, the capsule 23 may have a structure in which a liquid containing a flavoring agent is enveloped in a coating. The capsule 23 may have, but is not limited to, a spherical or cylindrical shape.

[0115] 6, the stick 30 according to an embodiment may further include a front end plug 33. The front end plug 33 is located on one side of the tobacco rod 31 facing the filter rod 32. The front end plug 33 can prevent the tobacco rod 31 from falling out. The front end plug 33 can prevent aerosol liquefied from the tobacco rod 31 during smoking from flowing into the aerosol generation device 10.

[0116] Filter rod 32 can include a first segment 321 and a second segment 322. First segment 321 can correspond to the first segment of filter rod 22 of FIG. 5. Second segment 322 can correspond to the third segment of filter rod 22 of FIG. 5.

[0117] The diameter and overall length of the stick 30 may correspond to the diameter and overall length of the stick 20 of Figure 5. For example, but not limited to, the length of the front end plug 33 may be about 7mm, the length of the tobacco rod 31 may be about 15mm, the length of the first segment 321 may be about 12mm, and the length of the second segment 322 may be about 14mm.

[0118] The stick 30 may be wrapped by at least one wrapper 35. The wrapper 35 may have at least one hole formed therein through which external air can flow in or internal gas can flow out. For example, the front end 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. Then, the entire stick 30 may be rewrapped by a fifth wrapper 355.

[0119] Also, at least one perforation 36 may be formed in the fifth wrapper 355. For example, but not limited to, the perforation 36 may be formed in a region surrounding the tobacco rod 31. For example, the perforation 36 may play a role in transferring heat generated by the heater 210 shown in FIG. 3 to the inside of the tobacco rod 31.

[0120] The second segment 322 may also include at least one capsule 34. Here, the capsule 34 may function to generate a flavor. The capsule 34 may also function to generate an aerosol. For example, the capsule 34 may have a structure in which a liquid containing a flavoring is enveloped by a coating. The capsule 34 may have, but is not limited to, a spherical or cylindrical shape.

[0121] The first wrapper 351 may be formed by bonding a metal foil, such as aluminum foil, to a general filter wrapper. For example, the total thickness of the first wrapper 351 may be in the range of 45 μm to 55 μm. For example, the total thickness of the first wrapper 351 may be 50.3 μm. The thickness of the metal foil of the first wrapper 351 may be in the range of 6 μm to 7 μm. For example, the thickness of the metal foil of the first wrapper 351 may be 6.3 μm. The basis weight of the first wrapper 351 may be 50 g / m 2 ~55g / m 2 For example, the basis weight of the first wrapper 351 may be in the range of 53 g / m 2 It could be.

[0122] The second wrapper 352 and the third wrapper 353 may be made from a conventional filter wrapper. For example, the second wrapper 352 and the third wrapper 353 may be a porous wrapper or a non-porous wrapper.

[0123] For example, the porosity of the second wrapper 352 may be, but is not limited to, 35000 CU. The thickness of the second wrapper 352 may be in the range of 70 μm to 80 μm. For example, the thickness of the second wrapper 352 may be 78 μm. The basis weight of the second wrapper 352 may be 20 g / m 2 ~25g / m 2 For example, the basis weight of the second wrapper 352 may be in the range of 23.5 g / m 2 It could be.

[0124] For example, the porosity of the third wrapper 353 may be, but is not limited to, 24000 CU. The thickness of the third wrapper 353 may be in the range of 60 μm to 70 μm. For example, the thickness of the third wrapper 353 may be 68 μm. The basis weight of the third wrapper 353 may be in the range of 20 g / m2 to 25 g / m2. For example, the basis weight of the third wrapper 353 may be 21 g / m2. 2 It could be.

[0125] The fourth wrapper 354 may be made of PLA laminated paper. Here, the PLA laminated paper may be a triple layer paper including a paper layer, a PLA layer, and a paper layer. For example, the thickness of the fourth wrapper 354 may be in the range of 100 μm to 120 μm. For example, the thickness of the fourth wrapper 354 may be 110 μm. In addition, the basis weight of the fourth wrapper 354 may be 80 g / m 2 ~100g / m 2 For example, the basis weight of the fourth wrapper 354 may be in the range of 88 g / m 2 It could be.

[0126] The fifth wrapper 355 may be made of a sterilized paper (MFW). Here, the sterilized paper (MFW) may be a paper that is 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 is 57 g / m 2 ~63g / m 2 For example, the basis weight of the fifth wrapper 355 may be in the range of 60 g / m 2 The thickness of the fifth wrapper 355 may be in the range of 64 μm to 70 μm. For example, the thickness of the fifth wrapper 355 may be 67 μm.

[0127] The fifth wrapper 355 may include a predetermined material. Here, an example of the predetermined material may be, but is not limited to, silicon. For example, silicon has properties such as heat resistance, which is less susceptible to change with temperature, oxidation resistance, resistance to various chemicals, water repellency, and electrical insulation. However, other materials than silicon may be applied (or coated) to the fifth wrapper 355 without any restrictions as long as they have the above-mentioned properties.

[0128] The front end plug 33 may be made of cellulose acetate. For example, the front end plug 33 may be made by adding a plasticizer (e.g., triacetin) to the cellulose acetate toe. The mono denier of the filaments constituting the cellulose acetate toe may be in the range of 1.0 to 10.0. For example, the mono denier of the filaments constituting the cellulose acetate toe may be in the range of 4.0 to 6.0. For example, the mono denier of the filaments of the front end plug 33 may be 5.0. Also, the cross section of the filaments constituting the front end plug 33 may be Y-shaped. The total denier of the front end plug 33 may be in the range of 20,000 to 30,000. For example, the total denier of the front end plug 33 may be in the range of 25,000 to 30,000. For example, the total denier of the front end plug 33 may be 28,000.

[0129] Optionally, the front end plug 33 may also include at least one channel, the cross-section of which may be fabricated in a variety of shapes.

[0130] The tobacco rod 31 may correspond to the tobacco rod 21 described above with reference to Figure 5. Therefore, in the following, a detailed description of the tobacco rod 31 will be omitted.

[0131] The first segment 321 may be made from cellulose acetate. For example, the first segment may be a tube-shaped structure with a hollow interior. The first segment 321 may be made from cellulose acetate to which a plasticizer (e.g., triacetin) is added. For example, the mono and total denier of the first segment 321 may be the same as the mono and total denier of the front end plug 33.

[0132] The second segment 322 may be made of cellulose acetate. The mono denier of the filaments constituting the second segment 322 may be in the range of 1.0 to 10.0. For example, the mono denier of the filaments of the second segment 322 may be in the range of 8.0 to 10.0. For example, the mono denier of the filaments of the second segment 322 may be 9.0. Also, 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 in the range of 20,000 to 30,000. For example, the total denier of the second segment 322 may be 25,000.

[0133] Referring to FIG. 7, the aerosol generating device 10 may include a resistance detection sensor 150, a temperature sensor 153, a puff sensor 155, a battery 16, a power supply circuit 160 and / or a heater 210.

[0134] According to an embodiment of the present disclosure, the main body 100 may be provided with a resistance detection sensor 150, a temperature sensor 153, a puff sensor 155, a battery 16, and / or a power supply circuit 160. The cartridge 200 may be provided with a first heater 210.

[0135] When the main body 100 and the cartridge 200 are combined, the resistance detection sensor 150 of the main body 100 may be electrically connected to the first heater 210 of the cartridge 200. For example, the resistance detection sensor 150 may be a current sensor that detects a current.

[0136] The power supply circuit 160 disposed inside the main body 100 can supply power to the first heater 210 using the power stored in the battery 16. Here, the amount of power supplied from the power supply circuit 160 to the first heater 210 can be adjusted under the control of the control unit 17.

[0137] The power supply circuit 160 may include a converter that converts the voltage output from the battery 16. For example, the converter may include a buck converter that reduces the voltage output from the battery 16. In the present disclosure, a buck converter is described as an example of a configuration for converting a voltage, but is not limited thereto. For example, the power supply circuit 160 may include a buck-boost converter, a Zener diode, etc.

[0138] The power supply circuit 160 may include at least one switching element operated under the control of the control unit 17. Here, power may be supplied to the first heater 210 by operation of the switching element. For example, the switching element may be a bipolar junction transistor (BJT) or a field effect transistor (FET).

[0139] When the first heater 210 and the resistance detection sensor 150 are electrically connected, the same level of current may flow through the first heater 210 and the resistance detection sensor 150. Here, the resistance value Rs of the shunt resistor included in the resistance detection sensor 150 may be a value that does not change depending on the temperature.

[0140] The control unit 17 can determine a voltage V1 applied to the first heater 210 and the resistance detection sensor 150 based on the power supplied from the power supply circuit 160 to the first heater 210, the current flowing through the first heater 210 and the resistance detection sensor 150, etc. The control unit 17 can calculate a voltage V2 applied to the shunt resistor based on the current flowing through the shunt resistor of the resistance detection sensor 150 and the resistance value Rs of the shunt resistor. Here, the control unit 17 can calculate the difference (V1-V2) between the voltage V1 applied to the first heater 210 and the resistance detection sensor 150 and the voltage V2 applied to the shunt resistor as the voltage applied to the first heater 210. In addition, the control unit 17 can calculate a resistance value Rh of the first heater 210 based on the voltage applied to the first heater 210 and the current flowing through the first heater 210.

[0141] Therefore, even while the wick is being heated by the first heater 210, the control unit 17 can determine the temperature of the first heater 210 in real time using the current flowing through the first heater 210 calculated via the resistance detection sensor 150.

[0142] Meanwhile, the resistor of the first heater 210 is a material having a resistance temperature coefficient, and the resistance value Rh of the first heater 210 may change depending on the temperature of the resistor. The control unit 17 can calculate the temperature of the first heater 210 based on the resistance temperature coefficient of the first heater 210, the resistance value Rh of the first heater 210, and the resistance value of the first heater 210 at a reference temperature, using a calculation formula for calculating the temperature of the first heater 210. Here, the calculation formula for calculating the temperature of the first heater 210 can be expressed by the following mathematical formula 1.

[0143]

number

[0144] In Equation 1, TCR may be the temperature coefficient of resistance of the first heater 210, T1 may be the temperature of the first heater 210, R1 may be the resistance value of the first heater 210, T0 may be the reference temperature, and R0 may be the resistance value of the first heater 210 at the reference temperature, where T0 is 25° C. and R0 may be the resistance value of the first heater 210 at 25° C.

[0145] Meanwhile, in this figure, a current sensor is described as being connected in series to the first heater 210, but the present invention is not limited to this, and a temperature sensor arranged adjacent to the first heater 210 to detect the temperature of the first heater 210, a voltage sensor to detect the voltage applied to the first heater 210, etc. can be provided as the resistance detection sensor 150.

[0146] The temperature sensor 153 may output a signal corresponding to the temperature of the gas flowing into the aerosol generating device 10. For example, the temperature sensor 153 may be disposed in a flow path through which the gas flows into the aerosol generating device 10. In the present embodiment, the temperature sensor 153 is described as being embodied by a sensor that outputs a signal corresponding to the temperature of the gas flowing into the aerosol generating device 10, but is not limited thereto. For example, the temperature sensor 153 may be a sensor disposed adjacent to the battery 16 to detect the temperature of the battery 16.

[0147] The puff sensor 155 may output a signal corresponding to a puff. For example, the puff sensor 155 may output a signal corresponding to the internal pressure of the aerosol generation device 10. Here, the internal pressure of the aerosol generation device 10 may correspond to the pressure of an airflow passage through which gas flows. In the present embodiment, the puff sensor 155 is described as being embodied by a pressure sensor that outputs a signal corresponding to the internal pressure of the aerosol generation device 10, but is not limited thereto.

[0148] Meanwhile, according to an embodiment, the temperature sensor 153 and the puff sensor 155 may be implemented as a single component.

[0149] The control unit 17 may determine a puff based on a signal received from the puff sensor 155. For example, the control unit 17 may determine whether a puff has occurred based on a sensing value of the signal of the puff sensor 150. For example, the control unit 17 may determine the strength of the puff based on the sensing value of the signal of the puff sensor 150. For example, the control unit 17 may determine the time when a puff has occurred (hereinafter, referred to as a puff time) based on the sensing value of the signal of the puff sensor 150.

[0150] The control unit 17 can control the aerosol generating module 13 based on the occurrence of the puff. For example, the control unit 17 can control the aerosol generating module 13 to supply power to the first heater 210 included in the aerosol generating module 13 based on the occurrence of the puff.

[0151] The control unit 17 can update the data stored in the memory 14 based on the occurrence of a puff. For example, the control unit 17 can update the current puff count stored in the memory 14 in response to the occurrence of a puff. For example, the control unit 17 can update data on the strength of the puff stored in the memory 14 in response to the occurrence of a puff.

[0152] 8a to 8c are flow charts illustrating a method of operating an aerosol generating device according to one embodiment of the present disclosure.

[0153] 8a, the aerosol generating device 10 may supply a predetermined power to the first heater 210 in the first pre-heating section in operation S801. Here, the predetermined power may be power (hereinafter, referred to as sensing power) supplied to the first heater 210 to detect the temperature of the first heater 210.

[0154] In this embodiment, a section in which aerosol is generated by heating the first heater 210 in response to the detection of a puff by the puff sensor 155 can be referred to as a heating section. On the other hand, a section in which a puff is not detected, for example, a section from the end of a puff to the start of another puff detection, can be referred to as a pre-heating section.

[0155] The aerosol generation device 10 may supply a predetermined minimum power (hereinafter, referred to as preheating power) to the first heater 210 based on the start of the preheating section. Here, the preheating power may be lower than the sensing power. For example, the aerosol generation device 10 may supply the preheating power to the first heater 210 from the start of the preheating section.

[0156] According to an embodiment, the aerosol generating device 10 may supply a sensing power higher than the preheating power to the first heater 210 after a predetermined time has elapsed since the start of the preheating section. Here, the predetermined time may correspond to a time during which liquid is supplied to the liquid transfer means (e.g., a wick) at a certain level or more. Meanwhile, the time during which the sensing power is supplied to the first heater 210 may be shorter than the predetermined time. For example, the predetermined time may be set to 3 seconds, and the time during which the sensing power is supplied may be set to 0.1 seconds.

[0157] In operation S802, the aerosol generating device 10 may determine whether the temperature of the first heater 210 corresponding to the supply of the sensing power exceeds a predetermined first temperature. Here, the first temperature may be a temperature (e.g., 210° C.) corresponding to the liquid being supplied to the liquid transfer means (e.g., the wick) below a certain level. For example, if the amount of the aerosol generating material flowing to the liquid transfer means temporarily decreases due to air bubbles formed in the chamber while the liquid aerosol generating material is not consumed, the temperature of the first heater 210 may temporarily become higher than the first temperature due to the supply of the sensing power.

[0158] When the temperature of the first heater 210 exceeds the first temperature in operation S803, the aerosol generation device 10 may interrupt pre-heating of the first heater 210. For example, the aerosol generation device 10 may interrupt the supply of pre-heating power to the first heater 210. This allows liquid to be more smoothly supplied to the liquid delivery means (e.g., a wick) until the heating section starts in a state in which the liquid aerosol generating material is not consumed.

[0159] In operation S804, when the temperature of the first heater 210 exceeds the first temperature, the aerosol generating device 10 may reduce the amount of power supplied to the first heater 210 in a heating section for heating the first heater 210. When the temperature of the first heater 210 exceeds the first temperature, the aerosol generating device 10 may reduce the magnitude of power supplied to the first heater 210 in the heating section and / or the time during which power is supplied to the first heater 210.

[0160] According to an embodiment, if the temperature of the first heater 210 detected in the first pre-heating section is equal to or lower than the first temperature, a first heating power may be supplied to the first heater 210 in the subsequent heating section. On the other hand, if the temperature of the first heater 210 detected in the first pre-heating section is higher than the first temperature, a second heating power lower than the first heating power may be supplied to the first heater 210 in the subsequent heating section. That is, if it is determined that the level of liquid supplied to the liquid delivery means (e.g., the wick) is lower than a certain level, the aerosol generating device 10 may supply a relatively low power to the first heater 210 in the heating section. As a result, the liquid may be more smoothly supplied to the liquid delivery means (e.g., the wick) in the second pre-heating section until the sensing power is supplied to the first heater 210 in the state where the liquid aerosol generating material is not consumed.

[0161] According to an embodiment, if the temperature of the first heater 210 detected in the first pre-heating section is equal to or lower than the first temperature, power may be supplied to the first heater 210 for a first heating time in the subsequent heating section. On the other hand, if the temperature of the first heater 210 detected in the first pre-heating section is higher than the first temperature, power may be supplied to the first heater 210 for a second heating time shorter than the first heating time in the subsequent heating section. That is, when it is determined that the level of liquid supplied to the liquid delivery means (e.g., the wick) is lower than a certain level, the aerosol generating device 10 may supply power to the first heater 210 for a relatively short time in the heating section. As a result, liquid may be more smoothly supplied to the liquid delivery means (e.g., the wick) in the second pre-heating section until the sensing power is supplied to the first heater 210 in the second pre-heating section without the liquid aerosol generating material being consumed.

[0162] In operation S805, the aerosol generation device 10 may determine whether a puff is detected through the puff sensor 155. For example, the aerosol generation device 10 may determine that a puff has occurred when the internal pressure value of the aerosol generation device 10 is less than a reference pressure value. For example, the aerosol generation device 10 may determine that a puff has occurred when the amount of change in the internal pressure value of the aerosol generation device 10 is equal to or greater than a minimum amount of change.

[0163] In operation S806, the aerosol generating device 10 may perform heating on the first heater 210 based on the detection of the puff. For example, the aerosol generating device 10 may supply a second heating power lower than the first heating power to the first heater 210. Here, the second heating power supplied to the first heater 210 in the heating section may be higher than the sensing power.

[0164] According to an embodiment, the predetermined power supplied to the first heater 210 in the heating section may vary depending on the number of puffs, the time elapsed in the heating section, etc. For example, the power supplied to the heater 210 while a puff is detected may decrease in response to the passage of time during which the puff is detected.

[0165] The aerosol generation device 10 may determine whether to end heating of the first heater 210 in operation S807. When the puff ends, the aerosol generation device 10 may end heating of the first heater 210. For example, the aerosol generation device 10 may determine that the puff ends when the internal pressure value of the aerosol generation device 10 is less than the reference pressure value. For example, the aerosol generation device 10 may determine that the puff ends when a slope corresponding to a change in the internal pressure value of the aerosol generation device 10 is greater than 0.

[0166] In operation S808, the aerosol generation device 10 may supply sensing power to the first heater 210 in the second pre-heating section. For example, the aerosol generation device 10 may supply sensing power to the first heater 210 when a predetermined time has elapsed since the start of the second pre-heating section.

[0167] In operation S809, the aerosol generating device 10 may determine whether the temperature of the first heater 210 corresponding to the supply of the sensing power exceeds a predetermined second temperature, where the second temperature may be a temperature higher than the first temperature. The second temperature may be a temperature (e.g., 240° C.) corresponding to the liquid contained in the liquid conveying means (e.g., the wick) being below a minimum level due to the liquid being consumed.

[0168] When the temperature of the first heater 210 exceeds the second temperature in operation S810, the aerosol generation device 10 may determine that the liquid aerosol generating material is exhausted. Here, the aerosol generation device 10 may cut off the supply of power to the first heater 210 in response to the exhaustion of the aerosol generating material. Meanwhile, the aerosol generation device 10 may maintain a state in which the supply of power to the first heater 210 is cut off until the cartridge 200 is replaced. For example, the aerosol generation device 10 may cut off the supply of power to the first heater 210 despite the detection of a puff by the puff sensor 155.

[0169] 8b, the aerosol generating device 10 may determine whether a puff is detected through the puff sensor 155 when the temperature of the first heater 210 is equal to or lower than the first temperature in the first pre-heating section in operation S811. Here, the aerosol generating device 10 may supply pre-heating power to the first heater 210 until a puff is detected.

[0170] In operation S812, the aerosol generating device 10 may perform heating on the first heater 210 based on the detection of the puff. For example, the aerosol generating device 10 may supply a first heating power to the first heater 210. Here, the first heating power supplied to the first heater 210 in the heating section may be higher than the sensing power.

[0171] The aerosol generating apparatus 10 may determine whether to end heating of the first heater 210 in operation S813. When the puff ends, the aerosol generating apparatus 10 may end heating of the first heater 210. Here, the aerosol generating apparatus 10 may supply preheating power to the first heater 210 in a first preheating section based on the end of the puff. In addition, the aerosol generating apparatus 10 may also determine whether the temperature of the first heater 210 corresponding to the supply of sensing power in the first preheating section exceeds a predetermined first temperature.

[0172] Meanwhile, referring to FIG. 8c, in operation S814, the aerosol generating device 10 can determine whether the temperature of the first heater 210 exceeds the first temperature when the temperature of the first heater 210 corresponding to the supply of sensing power in the second pre-heating section is below a predetermined second temperature.

[0173] In operation S815, when the temperature of the first heater 210 is equal to or lower than the first temperature, the aerosol generating device 10 may increase the amount of power supplied to the first heater 210 in a heating section for heating the first heater 210. For example, when the temperature of the first heater 210 is equal to or lower than the first temperature, the aerosol generating device 10 may increase the magnitude of power supplied to the first heater 210 in the heating section from the second heating power to the first heating power.

[0174] In operation S816, when the temperature of the first heater 210 exceeds the first temperature, the aerosol generating device 10 may maintain the amount of power supplied to the first heater 210 in the heating section for heating the first heater 210. For example, when the temperature of the first heater 210 exceeds the first temperature, the aerosol generating device 10 may maintain the magnitude of the power supplied to the first heater 210 in the heating section at the first heating power.

[0175] 9 and 10, a preheating power P0 may be supplied to the first heater 210 until time t1, which is a first preheating section. While the preheating power P0 is supplied to the first heater 210, the temperature of the first heater 210 may be maintained at a target temperature T0 in the preheating section.

[0176] Meanwhile, from time t1 to time t2, when a predetermined time has elapsed since the start of the first pre-heating section, a sensing power P1 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of the sensing power P1 is lower than the first temperature T1, the aerosol generating device 10 may determine that the liquid is contained in the liquid transfer means (e.g., the wick) at a certain level or more. In addition, the pre-heating power P0 may be continuously supplied to the first heater 210 even after time t2.

[0177] When a puff is detected at time t3, a first heating power P2 may be supplied to the first heater 210. Here, the supply of the first heating power P2 to the first heater 210 may generate an aerosol.

[0178] Meanwhile, from time t4 when the puff ends, preheating power P0 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of sensing power P1 in the previous preheating period is equal to or lower than the first temperature T1, the first preheating period may start again from time t4.

[0179] From time t5 to time t6, which is a predetermined time after time t4, the sensing power P1 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of the sensing power P1 exceeds a first temperature T1, the aerosol generation device 10 may determine that the liquid is contained in the liquid transfer means (e.g., the wick) below a certain level. In addition, the aerosol generation device 10 may interrupt the supply of the preheating power P0 to the first heater 210 if the temperature of the first heater 210 exceeds the first temperature T1.

[0180] When a puff is detected at time t7, a second heating power lower than the first heating power P2 may be supplied to the first heater 210. Here, the second heating power may be higher than the sensing power P1. Also, from time t8 when the puff ends, a preheating power P0 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of the sensing power P1 in the previous preheating section exceeds the first temperature T1, a second preheating section may start from time t8.

[0181] From time t9 to time t10, which is a predetermined time after time t8, a sensing power P1 may be supplied to the first heater 210. If the temperature of the first heater 210 corresponding to the supply of the sensing power P1 is lower than the second temperature T2, it may be determined that the liquid aerosol generating material has not been consumed. In addition, the preheating power P0 may be continuously supplied to the first heater 210 even after time t10.

[0182] 11 and 12, a preheating power P0 may be supplied to the first heater 210 until time t1, which is a first preheating section. Here, while the preheating power P0 is supplied to the first heater 210, the temperature of the first heater 210 may be maintained at a target temperature T0 in the preheating section.

[0183] Meanwhile, from time t1 to time t2, when a predetermined time has elapsed since the start of the first pre-heating section, a sensing power P1 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of the sensing power P1 exceeds a first temperature T1, the aerosol generating device 10 may determine that the liquid is contained in the liquid transfer means (e.g., the wick) below a certain level. In addition, the aerosol generating device 10 may interrupt the supply of the pre-heating power P0 to the first heater 210 when the temperature of the first heater 210 exceeds the first temperature T1.

[0184] When a puff is detected at time t3, a second heating power lower than the first heating power P2 may be supplied to the first heater 210. Also, from time t4 when the puff ends, a preheating power P0 may be supplied to the first heater 210. Here, if the temperature of the first heater 210 corresponding to the supply of the sensing power P1 in the previous preheating section exceeds the first temperature T1, a second preheating section may start from time t4.

[0185] From time t5 to time t6, which is a predetermined time after time t4, sensing power P1 can be supplied to first heater 210. Here, if the temperature of first heater 210 corresponding to the supply of sensing power P1 is lower than second temperature T2, aerosol generation device 10 can determine that the liquid aerosol generating material has been exhausted.

[0186] In response to the exhaustion of the liquid aerosol generating substance, the aerosol generating device 10 can cut off the supply of power to the first heater 210 from time t6.

[0187] According to one embodiment, in response to the exhaustion of the liquid aerosol generating material, a message regarding the exhaustion of the aerosol generating material can be output to a user. For example, the aerosol generating device 10 can output a screen corresponding to the exhaustion of the aerosol generating material via a display. For example, the aerosol generating device 10 can emit light corresponding to the exhaustion of the aerosol generating material by a light emitting diode (LED). For example, the aerosol generating device 10 can generate vibration corresponding to the exhaustion of the aerosol generating material by a motor.

[0188] Referring to FIG. 13, according to one embodiment of the present disclosure, an insertion space in which a cigarette 20 is placed may be formed at the upper end of a housing 201 of an aerosol generating device 10.

[0189] The insertion space may be formed by recessing a predetermined depth toward the inside of the housing 201 so that at least a portion of the cigarette 20 can be inserted. The depth of the insertion space may correspond to the length of the region of the cigarette 20 that contains the aerosol-generating material. For example, in the case where the aerosol generating device 10 is an apparatus capable of using the cigarette 20 of FIG. 5, the depth of the insertion space may correspond to the length of the tobacco rod 21 of the cigarette 20.

[0190] A battery 16, a printed circuit board 1310, and a heater may be arranged inside the housing 201 of the aerosol generating device 10.

[0191] Each component included in the aerosol generation device 10 may be mounted on one side and / or the other side of the printed circuit board 1310. The components mounted on the printed circuit board 1310 may transmit or receive signals to each other via the wiring layer of the printed circuit board 1310. For example, at least one communication module included in the communication interface 11, at least one sensor included in the sensor module 15, and the control unit 17 may be mounted on the printed circuit board 1310.

[0192] The printed circuit board 1310 may be disposed adjacent to the battery 16. For example, the printed circuit board 1310 may be disposed so that one surface faces the battery 16.

[0193] A display 1320 may be disposed on one side of the housing 201. The display 1320 may display a screen in response to a signal transmitted from the control unit 17.

[0194] A power supply terminal 1330 may be disposed on one side of the housing 201 of the aerosol generating device 10. The power supply terminal 1330 may be a wired terminal for wired communication such as USB.

[0195] A power supply circuit may be disposed between the battery 16 and the power terminal 1330. The power supply circuit may transmit power supplied from an external source to the battery 16 via the power terminal 1330. A power line 1335 for supplying power may be connected to the power terminal 1330. For example, the power terminal 1330 may be coupled to a connector of the power line 1335. The control unit 17 may determine whether the power line 1335 is connected to the power terminal 1330. For example, the control unit 17 may determine whether the power line 1335 is connected to the power terminal 1330 based on a signal generated when the power terminal 1330 and the power line 1335 are connected.

[0196] A motor 1340 that generates vibrations may be disposed inside the housing 101. The motor 1340 may adjust the period and / or intensity of the vibrations based on a signal transmitted from the control unit 17.

[0197] The structure of the aerosol generating device 10 is not limited to that shown in FIG. 13, and the arrangement of the battery 16, printed circuit board 1310, display 1320, power terminal 1330, motor 1340, etc. may vary depending on the embodiment.

[0198] According to an embodiment, when the aerosol generating device 10 includes the second heater 115 for heating the stick 20, the aerosol generating device 10 may start an operation for generating an aerosol based on the insertion of the stick 20. The second heater 115 may be referred to as a stick heater 115. For example, the aerosol generating device 10 may preheat the second heater 115 when the insertion of the stick 20 into the insertion space 130 is detected. For example, the aerosol generating device 10 may supply preheating power to the first heater 210 when the preheating of the second heater 115 is completed.

[0199] According to an embodiment, the aerosol generating device 10 may detect a resistance value of the first heater 210 based on the start of an operation for generating an aerosol. Here, the detected resistance value of the first heater 210 may be determined as a resistance value of the first heater 210 at a reference temperature used in a calculation formula for calculating the temperature of the first heater 210. Meanwhile, the reference temperature used in the calculation formula for calculating the temperature of the first heater 210 may correspond to a temperature of the gas detected via the temperature sensor 153 based on the start of an operation for generating an aerosol. That is, the resistance value of the first heater 210 and the temperature of the gas detected before the supply of power to the first heater 210 starts after the operation for generating an aerosol starts can be used in the calculation formula for calculating the temperature of the first heater 210.

[0200] Meanwhile, when a user uses a plurality of sticks 20 consecutively, the stick 20 may be inserted into the insertion space 130 again before the first heater 210 is sufficiently cooled. In addition, when the aerosol generating device 10 is stored in a low-temperature environment, even if a user uses the aerosol generating device 10 in a room-temperature environment, the temperature of the first heater 210 may be relatively low when the stick 20 is inserted into the insertion space 130. In such a case, a reference temperature used in a formula for calculating the temperature of the first heater 210 and / or an accurate detection of the resistance value of the first heater 210 at the reference temperature may be required.

[0201] According to one embodiment, when the aerosol generating device 10 is equipped with a second heater 115 for heating the stick 20, a reference temperature and / or a resistance value of the first heater 210 at the reference temperature used in a calculation formula for calculating the temperature of the first heater 210 can be detected based on the power supply to the second heater 115.

[0202] 14, the aerosol generating device 10 may perform an operation of preheating the second heater 115 from time t0 when the insertion of the stick 20 into the insertion space 130 is detected to time t1 corresponding to Tpre, which is a target temperature for the temperature of the second heater 115. Here, as time passes from time t0 to time t1, the temperature of the second heater 210 may change to a temperature corresponding to the temperature of the environment in which the user uses the aerosol generating device 10. In consideration of this, the aerosol generating device 10 may determine the temperature of the gas detected through the temperature sensor 153 at time t2, when a predetermined time has elapsed since the operation of preheating the second heater 115 was started, as a reference temperature used in a calculation formula for calculating the temperature of the first heater 210. In addition, the aerosol generating device 10 may determine the resistance value of the second heater 115 detected at time t2, when a predetermined time has elapsed since the operation of preheating the second heater 115 was started, as the resistance value of the first heater 210 at the reference temperature. Here, the predetermined time may be set to correspond to time t1 at which the operation of preheating the second heater 115 ends. For example, time t2 may be two seconds earlier than time t1.

[0203] As described above, according to at least one of the embodiments of the present disclosure, it is possible to determine whether the liquid aerosol generating material is smoothly supplied to the liquid delivery means based on the temperature of the heater 210 in the preheating section.

[0204] In addition, according to at least one of the embodiments of the present disclosure, when the liquid transmitting means is short of liquid aerosol generating material, the aerosol generating material can be smoothly supplied to the liquid transmitting means.

[0205] Furthermore, according to at least one of the embodiments of the present disclosure, it is possible to accurately determine whether the liquid aerosol generating material has been consumed based on the temperature of the heater 210 in the preheating section.

[0206] Referring to Figures 1 to 14, an aerosol generating device 10 according to one aspect of the present disclosure may include a chamber 220 for storing a liquid, a heater 210 for heating the liquid, a resistance detection sensor 150 for outputting a signal corresponding to the resistance value of the heater 210, and a control unit 17 for calculating the temperature of the heater 210 based on the resistance value of the heater 210. The control unit 17 determines whether the temperature of the heater 210 exceeds a first temperature in response to supply of a predetermined sensing power to the heater 210 in a first pre-heating section, and if the temperature of the heater 210 is equal to or lower than the first temperature, controls the heater 210 to supply a first amount of power in a heating section after the first pre-heating section, and if the temperature of the heater 210 exceeds the first temperature, controls the heater 210 to supply a second amount of power lower than the first amount of power in the heating section, and if the temperature of the heater 210 exceeds the first temperature, determines whether the temperature of the heater 210 exceeds a second temperature higher than the first temperature in response to supply of the sensing power to the heater 210 in a second pre-heating section after the heating section, and if the temperature of the heater 210 exceeds the second temperature, it may determine that the liquid is exhausted.

[0207] According to another aspect of the present disclosure, a heating section may start in response to an end of the first preheating section, and the second heating section may start in response to an end of the heating section.

[0208] According to another aspect of the present disclosure, the control unit 17 can control the heater 210 to be supplied with a preheating power lower than the sensing power based on the start of the first preheating period, and can control the heater 210 to be supplied with the sensing power after a predetermined time has elapsed since the start of the first preheating period.

[0209] According to another aspect of the present disclosure, the time during which the sensing power is supplied to the heater 210 may be shorter than the predetermined time.

[0210] According to another aspect of the present disclosure, when the temperature of the heater 210 exceeds the first temperature, the control unit 17 may cut off the power supply to the heater 210 until the first pre-heating period ends.

[0211] According to another aspect of the present disclosure, the sensing power may be lower than the heating power provided to the heater 210 in response to generating an aerosol by heating the liquid.

[0212] According to another aspect of the present disclosure, the aerosol generating device 10 may further include a housing 101 in which an insertion space 130 is formed, and a stick heater 115 for heating the stick 20 inserted into the insertion space 130. The control unit 17 may control the start of power supply to the stick heater 115 based on the insertion of the stick 20 into the insertion space 130, and may calculate the temperature of the heater 210 based on a resistance value of the heater 210 detected at a specific time point when a predetermined time has elapsed after the start of power supply to the stick heater 115.

[0213] According to another aspect of the present disclosure, the aerosol generating device 10 may further include a temperature sensor 153 for sensing a temperature of the gas flowing into the housing 101. The control unit 17 may calculate the temperature of the heater 210 based on the gas temperature detected at the specific time point and the resistance value of the heater 210.

[0214] According to another aspect of the present disclosure, the control unit 17 controls the heater 210 to supply a first heating power corresponding to the first amount of power in the heating section when the temperature of the heater 210 is equal to or lower than the first temperature, and controls the heater 210 to supply a second heating power corresponding to the second amount of power in the heating section when the temperature of the heater 210 exceeds the first temperature, and the first heating power may be higher than the second heating power.

[0215] According to another aspect of the present disclosure, the aerosol generating device 10 may further include an output device having a motor 1340 that generates vibrations. When it is determined that the liquid is consumed, the control unit 17 may generate vibrations corresponding to the consumption of the liquid via the motor 1340.

[0216] The specific embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct, and the structure or function of any or all of the elements of the embodiments of the present disclosure described above can be combined with other elements or combined with each other.

[0217] For example, configuration A described in one embodiment of this disclosure and the drawings and configuration B described in another embodiment of this disclosure and the drawings can be combined with each other. That is, even if a combination between configurations is not directly described, the combination is possible unless it is described that the combination is not possible.

[0218] Although the embodiments have been described above according to a number of exemplary embodiments, it should be understood that many other variations and embodiments are possible for those skilled in the art that fall within the scope of the principles of the present disclosure. More specifically, various modifications and variations are possible in the components and / or arrangements of the subject combinations within the scope of the present disclosure, the drawings, and the appended claims. In addition to the modifications and variations of the components and / or arrangements, other applications will be apparent to those skilled in the art.

Claims

1. a chamber configured to store a liquid; A heater for heating the liquid; a resistance detection sensor providing an output corresponding to a resistance value of the heater; A control unit, The control unit is Calculating a temperature of the heater based on a resistance value of the heater; determining whether a temperature of the heater exceeds a first temperature based on a supply of sensing power to the heater in a first preheating period; If the temperature of the heater is equal to or lower than the first temperature, a first amount of power is supplied to the heater in a heating section after the first preheating section; When the temperature of the heater exceeds the first temperature, a second amount of power lower than the first amount of power is supplied to the heater in the heating section; When the sensing power is supplied to the heater in a second pre-heating section after the heating section, and when it is determined that the temperature of the heater exceeds the first temperature, it is determined whether the temperature of the heater exceeds a second temperature higher than the first temperature; The aerosol generating device is characterized in that, when the temperature of the heater exceeds the second temperature, it is determined that the liquid is exhausted.

2. The heating section starts in response to the end of the first preheating section, The aerosol generating device according to claim 1 , wherein the second preheating section starts in response to the end of the heating section.

3. The control unit is supplying a preheating power lower than the sensing power to the heater based on a start of the first preheating period; The aerosol generating device according to claim 1 , wherein the sensing power is supplied to the heater when a predetermined time has elapsed since the start of the first pre-heating section.

4. The aerosol generating device according to claim 3 , wherein the time during which the sensing power is supplied to the heater is shorter than the predetermined time.

5. The aerosol generating device according to claim 1 , further characterized in that, when the temperature of the heater exceeds the first temperature, the control unit cuts off the supply of additional sensing power to the heater until the first pre-heating period ends.

6. The aerosol generating device according to claim 1 , wherein the sensing power is lower than a heating power supplied to the heater in the heating section.

7. A housing having an insertion space formed therein; and a stick heater for heating the stick positioned in the insertion space. The control unit further When the stick is located in the insertion space, power supply to the stick heater is started; The aerosol generating device according to claim 1, characterized in that the temperature of the heater is calculated based on the resistance value of the heater detected at a specific point in time after a predetermined time has elapsed since power supply to the stick heater was started.

8. a temperature sensor for sensing a temperature of the gas flowing into the housing; The aerosol generating device according to claim 7 , wherein the control unit further calculates a temperature of the heater based on the temperature of the gas detected at the specific time point and a resistance value of the heater.

9. The control unit further When the temperature of the heater is equal to or lower than the first temperature, a first heating power corresponding to the first amount of power is supplied to the heater in the heating section; supplying a second heating power corresponding to the second amount of power to the heater when the temperature of the heater exceeds the first temperature; The aerosol generating device according to claim 1 , wherein the first heating power is higher than the second heating power.

10. Further comprising a motor for generating vibrations; The aerosol generating device according to claim 1 , wherein the control unit further controls the motor to generate vibrations corresponding to the exhaustion of the liquid when it is determined that the liquid is exhausted.

11. a chamber configured to store a liquid aerosol generating material; a heater for heating the liquid aerosol generating material; a resistance detection sensor providing an output corresponding to a resistance value of the heater; A control unit, The control unit is Calculating a temperature of the heater based on a resistance value of the heater; determining whether a temperature of the heater exceeds a first temperature based on a supply of sensing power to the heater in a first preheating period; If the temperature of the heater is equal to or lower than the first temperature, a first amount of power is supplied to the heater in a heating section after the first preheating section; supplying a second amount of power to the heater in the heating section, the second amount of power being lower than the first amount of power, when the temperature of the heater exceeds the first temperature; When the sensing power is supplied to the heater in a second pre-heating section that occurs after the heating section, and when it is determined that the temperature of the heater has exceeded the first temperature, it is determined that the temperature of the heater has exceeded a second temperature that is higher than the first temperature; The aerosol generating device is characterized in that, when the temperature of the heater exceeds the second temperature, it is determined that the liquid aerosol generating material is exhausted.

12. A housing having an insertion space formed therein; and a stick heater for heating the stick positioned in the insertion space. The control unit further After the stick is positioned in the insertion space, power supply to the stick heater is started; The aerosol generating device according to claim 11, wherein the temperature of the heater is calculated based on a resistance value of the heater detected a predetermined time after power supply to the stick heater is started.

13. a temperature sensor for sensing a temperature of the gas flowing through the housing; The aerosol generating device according to claim 12 , wherein the control unit further calculates a temperature of the heater based on a temperature of the gas and a resistance value of the heater.

14. The control unit further When the temperature of the heater is equal to or lower than the first temperature, a first heating power corresponding to the first amount of power is supplied to the heater in the heating section; supplying a second heating power corresponding to the second amount of power to the heater when the temperature of the heater exceeds the first temperature; The aerosol generating device according to claim 11 , wherein the first heating power is higher than the second heating power.

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