Aerosol-generating device

Abstract

An aerosol-generating device according to an embodiment may comprise: a main body having an internal space formed on one side into which an aerosol-generating article is inserted; a susceptor housed within the body and heating the aerosol-generating article; the induction coil surrounds the susceptor and generates an alternating magnetic field; and a control section that controls an operation of the aerosol-generating device and includes at least one processor, in which the susceptor includes a hollow that increases an inductance of the susceptor when heated.

Description

Technical Field

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

[0002] Research into non-combustion cigarettes is ongoing. Aerosol-generating devices generate aerosols by heating an aerosol-generating article. To heat cigarettes using induction heating, electronic cigarette devices can use coils to generate an alternating magnetic field, which induces eddy currents in a susceptor near the cigarette. The eddy currents generated in the susceptor can increase the susceptor's temperature.

[0003] The foregoing description is information obtained during the process of conceiving the present disclosure or information already possessed at the time, and is not necessarily known technology before filing this application. Summary of the Invention

[0004] Technical problems to be solved An object according to one embodiment is to provide an aerosol generating device that can increase the inductance change of a susceptor during induction heating.

[0005] According to one embodiment, an object is to provide an aerosol generating device that can improve the temperature measurement accuracy of a susceptor during an induction heating process.

[0006] However, the technical problems to be solved by the embodiments are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by ordinary technicians in this field through the following description.

[0007] Technical solutions to the problem According to one embodiment, an aerosol generating device includes: a main body, which is formed with an internal space on one side for inserting an aerosol generating article; a susceptor, which is accommodated in the main body and heats the aerosol generating article; an induction coil, which surrounds the susceptor and generates an alternating magnetic field; and a control unit, which controls the operation of the aerosol generating device and includes at least one processor, wherein the susceptor may include a hollow space, and the hollow space increases the inductance of the susceptor when heated.

[0008] According to one embodiment, an aerosol generating device includes: a main body having an internal space formed on one side for inserting an aerosol generating article; a susceptor housed in the main body and heating the aerosol generating article; an induction coil surrounding the susceptor and generating an alternating magnetic field; and a control unit that controls the operation of the aerosol generating device and includes at least one processor, wherein a thread is formed on a surface of the susceptor so that inductance can be increased when the susceptor is heated.

[0009] Effects of the Invention According to any one of the embodiments of the present disclosure, an aerosol generating device can be provided, which is capable of increasing the inductance change of a susceptor during an induction heating process.

[0010] According to any one of the embodiments of the present disclosure, an aerosol generating device can be provided, which can improve the temperature measurement accuracy of a susceptor during an induction heating process.

[0011] The effects of the aerosol generating device according to an embodiment are not limited to the above-mentioned contents, and those skilled in the art can clearly understand other effects not mentioned from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0013] Figure 2 is a block diagram of an aerosol generating device according to an embodiment.

[0014] Figure 3a and Figure 3b A susceptor of an aerosol generating device according to an embodiment is schematically shown.

[0015] Figure 4 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0016] Figure 5 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0017] Figure 6 A susceptor of an aerosol generating device according to an embodiment is schematically shown.

[0018] Figure 7 FIG. 4 shows the variation of eddy current trajectory in a susceptor with signal frequency according to an embodiment.

[0019] Figure 8 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0020] Figure 9 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0021] Figure 10 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0022] The following drawings attached to this specification illustrate a preferred embodiment of the present invention and, together with the detailed description of the present invention, are used to further understand the technical concept of the present invention. Therefore, the present invention should not be interpreted as being limited to the contents shown in these drawings. DETAILED DESCRIPTION

[0023] When selecting terms used in the embodiments, the functions of the embodiments were taken into consideration, and widely used general terms were selected whenever possible. However, differences may exist based on the intentions of practitioners in the field, precedents, new technologies, etc. Furthermore, in specific cases, the applicant may arbitrarily select terms, but in such cases, the meaning of the terms will be explained in detail in the specification. Therefore, the terms used in this specification are not simple terms and should be defined according to the meaning of the terms and the overall content of the present invention.

[0024] When a section is described throughout the specification as "including" a component, unless otherwise specified, it indicates that other components may also be included and does not exclude other components. In addition, terms such as "unit" and "module" described in the specification refer to a unit that processes at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

[0025] The embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure can be implemented in various forms and is not limited to the embodiments described herein.

[0026] Figure 1 FIG2 is a diagram illustrating an aerosol generating device according to an embodiment.

[0027] Reference Figure 1 According to an embodiment of the present disclosure, the aerosol-generating device 1 may include at least one of a power supply 11, a control unit 12, a sensor 13, and a heater (receptor 18). At least one of the power supply 11, the control unit 12, the sensor 13, and the receptor 18 may be disposed within the main body 10 of the aerosol-generating device 1. The main body 10 may include an open space on one side (e.g., the upper side) for inserting a stick S (aerosol-generating article). The space open toward the upper side may be referred to as an insertion space. The insertion space may be recessed into the interior of the main body 10 to a predetermined depth, allowing at least a portion of the stick S to be inserted into the insertion space. The depth of the insertion space may correspond to the length of the region of the stick S containing the aerosol-generating material and / or medium. The lower end of the stick S may be inserted into the interior of the main body 10, while the upper end of the stick S may protrude from the main body 10. The user may place the exposed upper end of the stick S in their mouth and inhale air.

[0028] The susceptor 18 may heat the rod S. The heater may extend upward within the space in which the rod S is inserted.

[0029] The aerosol-generating device 1 may include an induction coil 181 surrounding a susceptor 18 serving as a heater. The induction coil 181 may heat the susceptor 18. The susceptor 18 may be heated by a magnetic field generated by alternating current (AC) flowing through the induction coil 181. The magnetic field may penetrate the susceptor 18 and generate eddy currents in the susceptor 18. The current may generate heat in the susceptor 18.

[0030] Figure 2 is a block diagram of an aerosol generating device 1 according to an embodiment.

[0031] The aerosol generating device 1 may include a power supply 11, a control unit 12, a sensor 13, an output unit 14, an input unit 15, a communication unit 16, a memory 17 and at least one heater 18, 24. However, the internal structure of the aerosol generating device 1 is not limited to Figure 1 As shown. It is understood by those skilled in the art that the aerosol generating device 1 can be omitted or modified according to different designs. Figure 1 Some of the components shown may be further added.

[0032] The sensor 13 can detect the state of the aerosol generating device 1 or the surrounding state of the aerosol generating device 1 and transmit the detected information to the control unit 12. The control unit 12 can control the aerosol generating device 1 to perform other functions based on the detected information, such as controlling the operation of the cartridge heater 24 and / or heater 18, restricting smoking, determining whether to insert the stick S and / or the cartridge 19, displaying notifications, etc.

[0033] The sensor 13 may include at least one of a temperature sensor 131 , a puff sensor 132 , an insertion detection sensor 133 , a reuse detection sensor 134 , a cartridge detection sensor 135 , a cover detection sensor 136 , and a motion detection sensor 137 .

[0034] The temperature sensor 131 can detect the heating temperature of the heater 24 and / or heater 18. The aerosol generating device 1 can include a separate temperature sensor to detect the temperature of the cartridge heater 24 and / or heater 18, or the cartridge heater 24 and / or heater 18 itself can be used as a temperature sensor.

[0035] The temperature sensor 131 can output a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18. For example, the temperature sensor 131 may include a resistive element, the resistance value of which changes in response to changes in the temperature of the cartridge heater 24 and / or heater 18. The temperature sensor 131 can be implemented by a thermistor, etc., which is an element that utilizes the characteristic that resistance changes with temperature. At this time, the temperature sensor 131 can output a signal corresponding to the resistance value of the resistive element as a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18. For example, the temperature sensor 131 can be configured as a sensor for detecting the resistance value of the cartridge heater 24 and / or heater 18. At this time, the temperature sensor 131 can output a signal corresponding to the resistance value of the cartridge heater 24 and / or heater 18 as a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18.

[0036] The temperature sensor 131 may be arranged around the power supply 11 to monitor the temperature of the power supply 11. The temperature sensor 131 may be provided near the power supply 11. For example, the temperature sensor 131 may be attached to one side of a battery serving as the power supply 11. For example, the temperature sensor 131 may be mounted on one side of a printed circuit board (PCB).

[0037] The temperature sensor 131 may be provided inside the main body 10 to sense the internal temperature of the main body 10 .

[0038] The puff sensor 132 can detect the user's puff based on various physical changes in the airflow path. The puff sensor 132 can output a signal corresponding to the puff. For example, the puff sensor 132 can be a pressure sensor. The puff sensor 132 can output a signal corresponding to the internal pressure of the aerosol generating device. Here, the internal pressure of the aerosol generating device 1 can correspond to the pressure in the airflow path through which the gas flows. The puff sensor 132 can be provided corresponding to the airflow path through which the gas flows in the aerosol generating device 1.

[0039] The insertion detection sensor 133 can detect the insertion and / or removal of the rod S. The insertion detection sensor 133 can sense a signal change based on the insertion and / or removal of the rod S. The insertion detection sensor 133 can be installed near the insertion space. The insertion detection sensor 133 can sense the insertion and / or removal of the rod S based on a change in the dielectric constant within the insertion space. For example, the insertion detection sensor 133 can be an inductive sensor and / or a capacitive sensor.

[0040] The inductive sensor may include at least one coil. The coil of the inductive sensor may be arranged near the insertion space. For example, when the magnetic field around the coil changes, the properties of the current flowing through the coil may change according to Faraday's law of electromagnetic induction. The properties of the current flowing through the coil may include the frequency of the alternating current, the current value, the voltage value, the inductance value, the impedance value, and the like.

[0041] The inductance sensor may output a signal corresponding to the property of the current flowing through the coil. For example, the inductance sensor may output a signal corresponding to the inductance value of the coil.

[0042] The capacitive sensor may include a conductor. The conductor of the capacitive sensor may be arranged near the insertion space. The capacitive sensor may output a signal corresponding to the electromagnetic properties of the surrounding environment (e.g., the capacitance around the conductor). For example, when a rod S comprising a metal packaging material is inserted into the insertion space, the electromagnetic properties around the conductor may be altered by the packaging material of the rod S.

[0043] The reuse detection sensor 134 can sense whether the stick S has been reused. The reuse detection sensor 134 can be a color sensor. The color sensor can sense the color of the stick S. The color sensor can sense the color of a portion of the packaging material surrounding the stick S. The color sensor can detect the value of an optical characteristic corresponding to the color of the object based on light reflected from the object. For example, the optical characteristic can be the wavelength of light. The color sensor can be implemented as a single component together with the proximity sensor, or as a separate component from the proximity sensor.

[0044] At least a portion of the packaging material comprising the stick S may change color due to the aerosol. The reuse detection sensor 134 may be positioned corresponding to the location where at least a portion of the packaging material changes color due to the aerosol when the stick S is inserted into the insertion space. For example, before a user uses the stick S, at least a portion of the packaging material may be a first color. In this case, when the aerosol generated by the aerosol generating device 1 passes through the stick S, at least a portion of the packaging material becomes wetted by the aerosol, and the color of at least a portion of the packaging material may change to a second color. Furthermore, after changing from the first color to the second color, the color of at least a portion of the packaging material may remain the second color.

[0045] The cartridge detection sensor 135 may sense the insertion and / or removal of the cartridge 19. The cartridge detection sensor 135 may be implemented by an inductance-based sensor, a capacitance sensor, a resistance sensor, or a Hall IC sensor utilizing the Hall effect.

[0046] The lid detection sensor 136 can sense the installation and / or removal of the lid. When the lid is removed from the main body 10, the cigarette cartridge 19 and a portion of the main body 10 covered by the lid may be exposed to the outside. The lid detection sensor 136 can be implemented as a contact sensor, a Hall effect sensor (Hall IC), an optical sensor, etc.

[0047] The motion detection sensor 137 may sense the motion of the aerosol generating device. The motion detection sensor 137 may be implemented by at least one of an acceleration sensor and a gyro sensor.

[0048] In addition to the aforementioned sensors ( 131 to 137 ), the sensor 13 may also include at least one of a humidity sensor, an air pressure sensor, a magnetic sensor, a position sensor (GPS), and a proximity sensor. Since those skilled in the art can intuitively infer the function of each sensor from its name, a detailed description is omitted.

[0049] The output unit 14 can output status information about the aerosol generating device 1 to the user. The output unit 14 can include at least one of a display 141, a tactile unit 142, and a sound output unit 143, but is not limited thereto. When the display 141 and the touchpad are stacked to form a touch screen, the display 141 can function not only as an output device but also as an input device.

[0050] The display 141 can visually provide information about the aerosol generating device 1 to the user. For example, the information about the aerosol generating device 1 can include various information, such as the charge / discharge status of the battery 11 of the aerosol generating device 1, the preheating status of the heater 18, the insertion / removal status of the wand S and / or the cigarette cartridge 19, the installation / removal status of the cap, or the use restriction status of the aerosol generating device 1 (e.g., detection of an abnormality). The display 141 can output this information externally. For example, the display 141 can be an LED light-emitting element. For example, the display 141 can be a liquid crystal display panel (LCD), an organic light-emitting display panel (OLED), or the like.

[0051] The tactile portion 142 can convert electrical signals into mechanical or electrical stimulation to provide the user with tactile information about the aerosol generating device 1. For example, when initial power is supplied to the cartridge heater 24 and / or heater 18 for a set period of time, the tactile portion 142 can generate vibrations corresponding to the completion of initial preheating. For example, the tactile portion 142 can include a motor, a piezoelectric element, or an electrical stimulation device.

[0052] The sound output unit 143 can provide the user with information about the aerosol generating device 1 through sound. For example, the sound output unit 143 can convert an electrical signal into a sound signal and output the sound signal to the outside.

[0053] The power source 11 can provide the power required to operate the aerosol-generating device 1. The power source 11 can provide power to heat the cartridge heater 24 and / or the heater 18. Furthermore, the power source 11 can provide power to operate other components of the aerosol-generating device 1 (e.g., the sensor 13, the output unit 14, the input unit 15, the communication unit 16, and the memory 17). The power source 11 can be a rechargeable battery or a disposable battery. For example, the power source 11 can be a lithium polymer (LiPoly) battery, but is not limited thereto.

[0054] although Figure 2 Not shown in the figure, the aerosol generating device 1 may further include a power protection circuit. The power protection circuit may be electrically connected to the power source 11 and may include a switching element.

[0055] The power protection circuit can cut off the electrical path of the power supply 11 under predetermined conditions. For example, when the voltage level of the power supply 11 is greater than or equal to a first voltage corresponding to overcharge, the power protection circuit can cut off the electrical path of the power supply 11. For example, when the voltage level of the power supply 11 is less than a second voltage corresponding to overdischarge, the power protection circuit can cut off the electrical path of the power supply 11.

[0056] The heater 18 may receive power from the power source 11 to heat the medium or aerosol generating material in the rod S. Figure 2 Although not shown, the aerosol generating device 1 may further include a power conversion circuit (e.g., a DC / DC converter) that converts the power from the power source 11 and supplies it to the cartridge heater 24 and / or the heater 18. Furthermore, when the aerosol generating device 1 uses induction heating to generate aerosol, the aerosol generating device 1 may further include a DC / AC converter to convert the direct current from the power source 11 into alternating current.

[0057] The control unit 12, the sensor 13, the output unit 14, the input unit 15, the communication unit 16, and the memory 17 can receive power from the power supply 11 to realize their functions. Figure 2 Although not shown in the figure, a power conversion circuit, such as a low dropout (LDO) circuit or a voltage regulator circuit, which converts the power of the power supply 11 and supplies it to each component may also be included. Figure 2Although not shown, a noise filter may be provided between the power supply 11 and the heater 18. The noise filter may be a low-pass filter. The low-pass filter may include at least one inductor and a capacitor. The cutoff frequency of the low-pass filter may correspond to the frequency of the high-frequency switching current applied from the power supply 11 to the heater 18. The low-pass filter can prevent high-frequency noise components from being applied to the sensor 13, such as the insertion detection sensor 133.

[0058] In one embodiment, the cartridge heater 24 and / or heater 18 can be made of any suitable resistive material. For example, suitable resistive materials can include metals or metal alloys such as titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, nickel-chromium, etc., but are not limited thereto. Furthermore, the heater 18 can be implemented as a metal heating wire, a metal heating plate provided with a conductive track, a ceramic heating element, etc., but is not limited thereto.

[0059] In another embodiment, the heater 18 may be an induction heater. For example, the heater 18 may include a susceptor that generates heat through a magnetic field applied by a coil, thereby heating the aerosol-generating substance.

[0060] The input unit 15 can receive information input by the user and can also output information to the user. For example, the input unit 15 can be a touch panel. The touch panel can include at least one touch sensor for sensing touch. For example, the touch sensor can include a capacitive touch sensor, a resistive touch sensor, a surface acoustic wave touch sensor, an infrared touch sensor, etc., but is not limited thereto.

[0061] The display 141 and the touch panel may be implemented as a single panel. For example, the touch panel may be inserted into the display 141 (eg, an on-cell type or an in-cell type). For example, the touch panel may be added to the display 141 (eg, an add-on type).

[0062] In addition, the input unit 15 may include a button, a keyboard, a dome switch, a roller, a roller switch, etc., but is not limited thereto.

[0063] The memory 17 is hardware that stores various data processed by the aerosol generating device 1. It can store data processed by the control unit 12 and data to be processed. The memory 17 can include at least one storage medium selected from the group consisting of flash memory, hard disk memory, multimedia card micro memory, card-type memory (such as SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic storage, magnetic disk, and optical disk. The memory 17 can store data such as the operating time of the aerosol generating device 1, the maximum number of puffs, the current number of puffs, at least one temperature profile, and the user's smoking pattern.

[0064] The communication unit 16 may include at least one component for communicating with other electronic devices. For example, the communication unit 16 may include at least one of a short-range communication unit and a wireless communication unit.

[0065] The short-range wireless communication unit may include a Bluetooth communication unit, a Bluetooth Low Energy (BLE) communication unit, a near field communication unit, a WLAN (Wi-Fi) communication unit, a Zigbee communication unit, an infrared (IrDA, infrared Data Association) communication unit, a WFD (Wi-Fi Direct) communication unit, an ultra wideband (UWB) communication unit, an Ant+ communication unit, etc., but is not limited thereto.

[0066] The wireless communication unit may include a cellular network communication unit, an Internet communication unit, a computer network (eg, LAN or WAN) communication unit, etc., but is not limited thereto.

[0067] although Figure 2Not shown, the aerosol generating device 1 further includes a connection interface such as a universal serial bus (USB) interface, and can be connected to other external devices via the USB interface to send and receive information or charge the power supply 11.

[0068] The control unit 12 can control the overall operation of the aerosol generating device 1. In one embodiment, the control unit 12 may include at least one processor. The processor may be implemented as a plurality of logic gate arrays or as a combination of a general-purpose microprocessor and a memory, wherein the memory stores programs executable by the microprocessor. It will be apparent to those skilled in the art that the at least one processor may be other forms of hardware.

[0069] The control unit 12 can control the temperature of the heater 18 by controlling the power supply from the power supply 11 to the heater 18. The control unit 12 can control the temperature of the cartridge heater 24 and / or heater 18 based on the temperature of the cartridge heater 24 and / or heater 18 sensed by the temperature sensor 131. The control unit 12 can adjust the power supplied to the cartridge heater 24 and / or heater 18 based on the temperature of the cartridge heater 24 and / or heater 18. For example, the control unit 12 can determine the target temperature of the cartridge heater 24 and / or heater 18 based on the temperature curve stored in the memory 17.

[0070] The aerosol generating device 1 may include a power supply circuit (not shown) located between the power supply 11 and the cartridge heater 24 and / or heater 18 and electrically connected to the power supply 11. The power supply circuit may be electrically connected to the cartridge heater 24, heater 18, or an induction coil (not shown). The power supply circuit may include at least one switching element. The switching element may be implemented by a bipolar junction transistor (BJT), a field-effect transistor (FET), or the like. The control unit 12 may control the power supply circuit.

[0071] The control unit 12 can control the power supply by controlling the switching elements of the power supply circuit. The power supply circuit can be an inverter that converts the direct current output by the power source 11 into alternating current. For example, the inverter can be configured as a half-bridge circuit or a full-bridge circuit including multiple switching elements.

[0072] The control unit 12 can turn on the switching element to supply power from the power supply 11 to the cartridge heater 24 and / or the heater 18. The control unit 12 can turn off the switching element to cut off the power supply to the cartridge heater 24 and / or the heater 18. The control unit 12 can adjust the current supplied from the power supply 11 by adjusting the frequency and / or duty cycle of the current pulses input to the switching element.

[0073] The control unit 12 can control the voltage output from the power supply 11 by controlling the switching elements of the power supply circuit. The power conversion circuit can convert the voltage output from the power supply 11. For example, the power conversion circuit may include a buck converter for reducing the voltage output from the power supply 11. For example, the power conversion circuit can be implemented by a buck-boost converter, a Zener diode, or the like.

[0074] Control unit 12 can adjust the voltage level output by the power conversion circuit by controlling the on / off operation of a switching element included in the power conversion circuit. When the switching element is in the on state, the voltage level output by the power conversion circuit can correspond to the voltage level output by power supply 11. The duty cycle of the on / off operation of the switching element can correspond to the ratio of the voltage output by the power conversion circuit to the voltage output by power supply 11. As the duty cycle of the on / off operation of the switching element decreases, the voltage level output by the power conversion circuit can decrease. Heater 18 can heat based on the voltage output by the power conversion circuit.

[0075] The control portion 12 may control the supply of power to the heater 18 using at least one of a pulse width modulation (PWM) scheme and a proportional-integral-differential (PID) scheme.

[0076] For example, the control portion 12 may control a current pulse having a predetermined frequency and duty ratio to be supplied using a PWM scheme to the heater 18. The control portion 12 may control the power supplied to the heater 18 by adjusting the frequency and duty ratio of the current pulse.

[0077] For example, the control unit 12 may determine a target temperature, i.e., a control target, based on the temperature curve. The control unit 12 may control the power supplied to the heater 18 using a PID scheme, which is a feedback control scheme using a difference between the temperature of the heater 18 and the target temperature, a value obtained by integrating the difference over time, and a value obtained by differentiating the difference over time.

[0078] The control unit 12 can prevent the cartridge heater 24 and / or heater 18 from overheating. For example, the control unit 12 can control the operation of the power conversion circuit to stop supplying power to the cartridge heater 24 and / or heater 18 based on the temperature of the cartridge heater 24 and / or heater 18 exceeding a preset temperature limit. For example, the control unit 12 can reduce the amount of power supplied to the cartridge heater 24 and / or heater 18 by a predetermined proportion based on the temperature of the cartridge heater 24 and / or heater 18 exceeding a preset temperature limit. For example, the control unit 12 can determine that the aerosol-generating material contained in the cartridge 19 has been exhausted based on the temperature of the cartridge heater 24 exceeding the temperature limit, and cut off the power to the cartridge heater 24.

[0079] The control unit 12 may control the charge and discharge of the power source 11. The control unit 12 may confirm the temperature of the power source 11 based on the output signal of the temperature sensor 131.

[0080] When the power cord is connected to the battery terminal of the aerosol generating device 1, the control unit 12 can confirm whether the temperature of the power supply 11 is greater than or equal to a first temperature limit, which is a criterion for cutting off the charging of the power supply 11. When the temperature of the power supply 11 is less than the first temperature limit, the control unit 12 can control the power supply 11 to charge according to a preset charging current. When the temperature of the power supply 11 is greater than or equal to the first temperature limit, the control unit 12 can cut off the charging of the power supply 11.

[0081] When the aerosol generating device 1 is powered on, the control unit 12 can determine whether the temperature of the power supply 11 is greater than or equal to a second temperature limit, which serves as a criterion for shutting off the power supply 11 from discharging. When the temperature of the power supply 11 is less than the second temperature limit, the control unit 12 can control the use of the power stored in the power supply 11. When the temperature of the power supply 11 is greater than or equal to the second temperature limit, the control unit 12 can stop using the power stored in the power supply 11.

[0082] The control portion 12 may calculate the remaining capacity of the power stored in the power source 11. For example, the control portion 12 may calculate the remaining capacity of the power source 11 based on the voltage of the power source 11 and / or the sensed current value.

[0083] The control unit 12 can determine whether the stick S is inserted into the insertion space using the insertion detection sensor 133. The control unit 12 can determine whether the stick S is inserted based on the output signal of the insertion detection sensor 133. When it is determined that the stick S is inserted into the insertion space, the control unit 12 can control the supply of power to the cartridge heater 24 and / or heater 18. For example, the control unit 12 can supply power to the cartridge heater 24 and / or heater 18 based on a temperature profile stored in the memory 17.

[0084] The control unit 12 can determine whether the rod S has been removed from the insertion space. For example, the control unit 12 can determine whether the rod S has been removed from the insertion space using the insertion detection sensor 133. For example, when the temperature of the heater 18 is greater than or equal to the temperature limit, or when the temperature gradient of the heater 18 is greater than or equal to a set gradient, the control unit 12 can determine that the rod S has been removed from the insertion space. If it is determined that the rod S has been removed from the insertion space, the control unit 12 can cut off power to the cartridge heater 24 and / or heater 18.

[0085] The control unit 12 can control the duration and / or amount of power supplied to the heater 18 based on the state of the rod S sensed by the sensor 13. The control unit 12 can identify a level range encompassing the capacitance sensor signal level based on a lookup table. The control unit 12 can determine the moisture content in the rod S based on the identified level range.

[0086] When the rod S is in an over-humidified state, the control unit 12 may increase the preheating time of the rod S relative to the case where the rod S is in a normal state by controlling the power supply time of the heater 18 .

[0087] The control unit 12 can use the reuse detection sensor 134 to determine whether the stick S inserted into the insertion space has been reused. For example, the control unit 12 can compare the sensed value of the signal from the reuse detection sensor 134 with a first reference range including a first color. When the sensed value falls within the first reference range, the control unit 12 determines that the stick S has not been used. For example, the control unit 12 can compare the sensed value of the signal from the reuse detection sensor with a second reference range including a second color. When the sensed value falls within the second reference range, the control unit 12 determines that the stick S has been used. If it is determined that the stick S has been used, the control unit 12 can cut off power to the cartridge heater 24 and / or heater 18.

[0088] The control unit 12 may determine whether the cartridge 19 is coupled and / or removed through the cartridge detection sensor 135. For example, the control unit 12 may determine whether the cartridge 19 is coupled and / or removed based on the sensed value of the signal of the cartridge detection sensor 135.

[0089] The control unit 12 can determine whether the aerosol-generating material in the cartridge 19 is depleted. For example, the control unit 12 can preheat the cartridge heater 24 and / or heater 18 by applying power, and determine whether the temperature of the cartridge heater 24 exceeds a temperature limit during the preheating period. When the temperature of the cartridge heater 24 exceeds the temperature limit, the control unit 12 determines that the aerosol-generating material in the cartridge 19 is depleted. When it is determined that the aerosol-generating material in the cartridge 19 is depleted, the control unit 12 can cut off power to the cartridge heater 24 and / or heater 18.

[0090] The control unit 12 can determine whether the cigarette cartridge 19 is usable. For example, when the current number of puffs is greater than or equal to the maximum number of puffs in the cigarette cartridge 19 set based on the data stored in the memory 17, the control unit 12 can determine that the cigarette cartridge 19 is unusable. For example, when the total heating time of the heater 24 is greater than or equal to a preset maximum time, or when the total power supplied to the heater 24 is greater than or equal to a preset maximum power, the control unit 12 can determine that the cigarette cartridge 19 is unusable.

[0091] The control unit 12 can determine the user's inhalation using the puff sensor 132. For example, the control unit 12 can determine whether a puff has occurred based on the sensed value of the signal from the puff sensor 132. For example, the control unit 12 can determine the intensity of the puff based on the sensed value of the signal from the puff sensor 132. When the number of puffs reaches a preset maximum number of puffs or when no puff is detected for a preset time, the control unit 12 can cut off power to the cartridge heater 24 and / or heater 18.

[0092] The control portion 12 may determine whether the cover is covered and / or removed through the cover detection sensor 136. For example, the control portion 12 may determine whether the cover is covered and / or removed based on a sensed value of a signal from the cover detection sensor 136.

[0093] The control unit 12 can control the output unit 14 based on the sensing results of the sensor 13. For example, when the number of puffs counted by the puff sensor 132 reaches a preset number, the control unit 12 can notify the user of the imminent end of the aerosol generating device 1 through at least one of the display 141, the tactile unit 142, and the sound output unit 143. For example, the control unit 12 can notify the user through the output unit 14 based on a determination that the stick S is not in the insertion space. For example, the control unit 12 can notify the user through the output unit 14 based on a determination that the cigarette cartridge 19 and / or the lid are not installed. For example, the control unit 12 can provide the user with information about the temperature of the cigarette cartridge heater 24 and / or the heater 18 through the output unit 14.

[0094] Based on the occurrence of predetermined events, the control unit 12 can store and update a history of the events in the memory 17. These events may include detecting the insertion of a stick S, starting heating of the stick S, detecting a puff, ending a puff, detecting overheating of the cartridge heater 24 and / or heater 18, detecting overvoltage applied to the cartridge heater 24 and / or heater 18, ending heating of the stick S, turning the power supply of the aerosol generating device 1 on / off, starting charging of the power supply 11, detecting overcharging of the power supply 11, ending charging of the power supply 11, and the like. These operations are performed by the aerosol generating device 1. The event history may include the date and time of the event, log data corresponding to the event, and the like. For example, if the predetermined event is detecting the insertion of a stick S, the log data corresponding to the event may include data on the sensed value of the insertion detection sensor 133. For example, if the predetermined event is detection of overheating of the cartridge heater 24 and / or heater 18, the log data corresponding to the event may include data on the temperature of the cartridge heater 24 and / or heater 18, the voltage applied to the cartridge heater 24 and / or heater 18, the current flowing in the cartridge heater 24 and / or heater 18, etc.

[0095] The control unit 12 can control the formation of a communication link with an external device (e.g., a user's mobile terminal). Upon receiving authentication data from the external device via the communication link, the control unit 12 can remove usage restrictions on at least one function of the aerosol generating device 1. The authentication data may include data indicating that user authentication of the user corresponding to the external device has been completed. The user can perform user authentication through the external device. The external device can determine whether the user data is valid based on the user's date of birth, a unique number identifying the user, or the like, and receive permission data for using the aerosol generating device 1 from an external server. Based on the permission data, the external device can transmit data indicating the completion of user authentication to the aerosol generating device 1. In response to the completion of user authentication, the control unit 12 can remove usage restrictions on at least one function of the aerosol generating device 1. For example, in response to the completion of user authentication, the control unit 12 can remove usage restrictions on the heating function for supplying power to the heater 18.

[0096] The control unit 12 can transmit the status data of the aerosol generating device 1 to the external device via a communication link with the external device. Based on the received status data, the external device can output the remaining capacity of the power supply 11 of the aerosol generating device 1, the operating mode, etc. through the display of the external device.

[0097] The external device may transmit a location search request to the aerosol generating device 1 based on an input initiating a search for the location of the aerosol generating device 1. Upon receiving the location search request from the external device, the control unit 12 may control at least one of the output devices to perform an operation corresponding to the location search based on the received location search request. For example, the haptic unit 142 may generate vibrations in response to the location search request. For example, the display 141 may output objects corresponding to the location search and the end of the search in response to the location search request.

[0098] When firmware data is received from an external device, the control unit 12 may control the execution of a firmware update. The external device may check the current version of the firmware of the aerosol generating device 1 and determine whether a new version of the firmware exists. When an input requesting firmware download is received, the external device may receive the new version of the firmware data and transmit the new version of the firmware data to the aerosol generating device 1. When the new version of the firmware data is received, the control unit 12 may control the update of the firmware of the aerosol generating device 1.

[0099] The control unit 12 can transmit the sensed value data of at least one sensor 13 to an external server (not shown) via the communication unit 16, receive a learning model generated by learning the sensed values ​​through machine learning (e.g., deep learning) from the external server, and store the learned model. The control unit 12 can use the learning model received from the external server to perform operations such as determining the user's inhalation pattern and generating a temperature profile. The control unit 12 can store the sensed value data of at least one sensor 13 and data used for training an artificial neural network (ANN) in the memory 17. For example, the memory 17 can store a database of each component provided in the aerosol generating device 1, weights forming the ANN structure, and bias. The control unit 12 can generate at least one learning model that learns the sensed value of at least one sensor 13, the user's inhalation pattern, the temperature profile, and other data stored in the memory 17, and use it to determine the user's inhalation pattern and generate the temperature profile.

[0100] In one embodiment, the aerosol generating device 1 may further include a sensing portion 23. The sensing portion 23 may include an RGB sensor capable of detecting color or hue. For example, the sensing portion 23 may include a light-emitting sensor and a light-receiving sensor facing the outside of the stick S, wherein the light-emitting sensor and the light-receiving sensor may be arranged to face the insertion space of the main body 10 and / or may be arranged at the upper end of the main body 10 so as to face the stick S exposed to the outside of the main body 10.

[0101] Refer again Figure 1 , the susceptor 18 may include a hollow space 182 that increases the inductance generated when the susceptor 18 is heated.

[0102] In one embodiment, the susceptor 18 includes a rod protruding toward the opening of the internal space. The rod may protrude upward from the end of the internal space. For example, the rod may be configured in any of the following shapes: a tube, a plate, a needle, or a rod.

[0103] The hollow 182 may be formed along the longitudinal direction of the rod (eg, Figure 1 The width of the susceptor 18 can be defined as the width of the susceptor 18 in a direction perpendicular to the longitudinal direction of the susceptor 18 (e.g., Figure 1 length in the Y direction).

[0104] Figure 3a and Figure 3b The figure schematically shows a cross section of a susceptor 18 of an aerosol generating device 1 according to an embodiment. Figure 3a shows the state of the susceptor 18 before heating, Figure 3b The susceptor 18 is heated and its temperature is increased.

[0105] Reference Figure 3a , the susceptor 18 may include a hollow 182 therein, and before being heated, the susceptor 18 may have a first width D1. Figure 3b When the susceptor 18 is heated by the induction coil 181, the width of the hollow 182 increases as the hollow 182 expands. At this time, the susceptor 18 may have a second width D2, and the second width D2 may be greater than the first width D1.

[0106] When the temperature of the susceptor 18 increases, the inductance and / or resistance of the susceptor 18 may increase. As the inductance of the susceptor 18 increases, the natural frequency of the susceptor 18 at the corresponding temperature may decrease. When the natural frequency of the susceptor 18 decreases, the eddy current trajectory that appears at room temperature may move to the left relative to the frequency axis. As a result, the amount of current change may increase and the accuracy of temperature measurement may also be improved. The hollow space 182 in the susceptor 18 may significantly increase the width D2 of the susceptor 18, and the increased second width D2 of the susceptor 18 may significantly increase the inductance of the susceptor 18 compared to the susceptor 18 having the first width D1. This will be referred to Figure 6 Describe in more detail.

[0107] In one embodiment, the susceptor 18 may be made of a magnetic material. For example, the susceptor 18 may be made of a ferromagnetic material. Due to the magnetic changes caused by heat, the inductance of the susceptor 18 may change.

[0108] Figure 4 An aerosol generating device 2 according to an embodiment is shown.

[0109] The aerosol-generating device 2 includes at least one of a power source 21, a control unit 22, a sensor 23, and a heater (susceptor 28). At least one of the power source 21, the control unit 22, the sensor 23, and the susceptor 28 may be disposed within the body 20 of the aerosol-generating device 2. The body 20 may include a space open on one side (e.g., the top) to allow insertion of a stick S, serving as an aerosol-generating article. The susceptor 28 can heat the stick S. The aerosol-generating device 2 includes an induction coil 281 surrounding the susceptor 28, serving as a heater.

[0110] In one embodiment, the susceptor 28 may include threads 283 on its surface, which may increase the generation of inductance when the susceptor 28 is heated.

[0111] The susceptor 28 may include a rod protruding toward the opening of the internal space, and an outer surface of the rod may include a Figure 4 A thread 283 is formed on the upper surface of the substrate 282 (in the X direction).

[0112] When current is generated in the susceptor 28 by the induction coil 281, the current may flow primarily along the outer surface of the susceptor 28 due to the skin effect. At this time, the current flows along the threads 283 formed on the outer surface of the susceptor 28, and thus flows along the length direction around the outer circumference of the susceptor 28. This is modeled as current passing through a coil, where the number of turns of the threads corresponds to the number of turns of the coil.

[0113] Compared to a sensor 28 without threads 283, the sensor 28 with threads 283 can increase inductance through the skin effect of the induced current. Increasing the inductance increases the current variation, thereby improving the accuracy of temperature measurement.

[0114] Figure 5 An aerosol generating device 3 according to an embodiment is shown.

[0115] The aerosol-generating device 3 may include at least one of a power source 31, a control unit 32, a sensor 33, and a heater (susceptor 38). At least one of the power source 31, the control unit 32, the sensor 33, and the susceptor 38 may be disposed within the body 30 of the aerosol-generating device 3. The body 30 may include a space open on one side (e.g., the upper side) to allow insertion of a stick S, serving as an aerosol-generating article. The susceptor 38 may heat the stick S. The aerosol-generating device 3 may include an induction coil 381 surrounding the susceptor 38, serving as a heater.

[0116] In one embodiment, the susceptor 38 may include a hollow space 382 for increasing the inductance generated when the susceptor 38 is heated, and threads 383 formed on the surface of the susceptor 38. The hollow space 382 of the susceptor 38 may increase the width of the susceptor 38 when heated, thereby increasing the inductance of the susceptor 38, and the threads 383 of the susceptor 38 may also increase the inductance generated when the susceptor 38 is heated.

[0117] Figure 6 FIG2 schematically shows a cross section of a susceptor 38 of an aerosol generating device 3 according to an embodiment. Figure 6 The susceptor 38 includes a hollow 382 and threads 383 to maximize the increase in inductance when the susceptor 38 is heated.

[0118] Figure 7 FIG. 1 shows the trajectory of eddy currents in a susceptor as a function of signal frequency according to an embodiment.

[0119] Since the sensor is electrically isolated from the induction coil, it is difficult to measure the temperature of the sensor directly. In this case, the temperature of the sensor can be estimated from the current.

[0120] According to one embodiment, the electrical characteristics 404 of the susceptor before heating may differ from the electrical characteristics 402 of the susceptor after heating. For example, because the first natural frequency 414 of the susceptor before heating differs from the natural frequency 412 of the susceptor after heating, the first eddy current trajectory 404 of the susceptor before heating, represented by the frequency of the provided signal, may differ from the second eddy current trajectory 402 of the susceptor after heating.

[0121] When the temperature of a susceptor increases, its inductance and / or resistance may increase. As the inductance of the susceptor increases, its natural frequency at the corresponding temperature may decrease. As the natural frequency of the susceptor decreases, the eddy current trajectory occurring at room temperature may shift to the left relative to the frequency axis. Consequently, the eddy current value in the heated susceptor may decrease compared to the eddy current value in the susceptor before heating (at room temperature). At a specific frequency 420, the eddy current trajectory shifts to the left, causing a change in current ΔI. Since the temperature change is proportional to the current change ΔI, a large current change ΔI results in a large temperature change, thereby improving temperature measurement accuracy.

[0122] The degree Δf by which the eddy current trajectory shifts to the left relative to the frequency axis may be proportional to the increase in the inductance of the susceptor.

[0123] As described above, when the susceptor 18 according to one embodiment includes the hollow space 182, or when the susceptor 28 according to one embodiment includes the thread 283, or when the susceptor 38 according to one embodiment includes the hollow space 382 and the thread 383, the inductance of the susceptors 18, 28, and 38 increases when heated, thereby increasing the degree Δf by which the eddy current trajectory shifts to the left relative to the frequency axis. Accordingly, the current change ΔI increases, and the temperature change also increases, thereby improving the accuracy of susceptor temperature measurement.

[0124] Figure 8 1 is a diagram illustrating an aerosol generating device 5 according to an embodiment.

[0125] Reference Figure 8 The aerosol-generating device 5 may include at least one of a power source 51, a control unit 52, a sensor 53, and a heater (susceptor 58). At least one of the power source 51, the control unit 52, the sensor 53, and the susceptor 58 may be disposed within the body 50 of the aerosol-generating device 5. The body 50 may include a space open on one side (e.g., the upper side) to allow insertion of a stick S serving as an aerosol-generating article. The aerosol-generating device 5 may include an induction coil 581 surrounding the susceptor 58 serving as a heater.

[0126] A susceptor 58 may be provided inside the rod S, and the magnetic field generated by an alternating current (AC) flowing through an induction coil 581 heats the susceptor 58 inside the rod S. The susceptor 58 is disposed inside the rod S and does not need to be electrically connected to the aerosol generating device. The susceptor 58 can be inserted into the insertion space together with the rod S and can be removed from the insertion space together with the rod S. The rod S can be heated by the susceptor 58 inside the rod S. In this case, the aerosol generating device does not need to be equipped with a heater.

[0127] In one embodiment, the susceptor 58 may include a plurality of electrodes along the length of the rod S (e.g., Figure 8 The susceptor 58 may be formed as a rod (in the X direction), and a hollow space 582 may be formed inside the rod along its length. The hollow space 582 of the susceptor 58 may increase the width of the susceptor 58 when the susceptor 58 is heated, thereby increasing the inductance of the susceptor 58.

[0128] Figure 9 1 is a diagram illustrating an aerosol generating device 6 according to an embodiment.

[0129] Reference Figure 9The aerosol-generating device 6 may include at least one of a power source 61, a control unit 62, a sensor 63, and a heater (susceptor 68). At least one of the power source 61, the control unit 62, the sensor 63, and the susceptor 68 may be disposed within the body 60 of the aerosol-generating device 6. The body 60 may include a space open on one side (e.g., the upper side) to allow insertion of a stick S serving as an aerosol-generating article. The aerosol-generating device 6 may include an induction coil 681 surrounding the susceptor 68 serving as a heater.

[0130] The susceptor 68 may be included within the rod S, and the magnetic field generated by the AC current flowing through the induction coil 681 may heat the susceptor 68 within the rod S. The susceptor 68 is disposed within the rod S and may not be electrically connected to the aerosol generating device. The susceptor 68 may be inserted into the insertion space together with the rod S and may be removed from the insertion space together with the rod S. The rod S may be heated by the susceptor 68 within the rod S. In this case, the aerosol generating device may not be equipped with a heater.

[0131] In one embodiment, the susceptor 68 may include a plurality of electrodes along the length of the rod S (e.g., Figure 9 The susceptor 68 is formed as a rod (in the X direction), and a hollow space 682 may be formed inside the rod along its length. Threads 683 may be formed on the surface of the rod. The hollow space 682 of the susceptor 68 increases the width of the susceptor 68 when heated, thereby increasing the inductance of the susceptor 68. The threads 683 of the susceptor 68 also increase the inductance generated when the susceptor 68 is heated.

[0132] Figure 10 1 is a diagram illustrating an aerosol generating device 7 according to an embodiment.

[0133] Reference Figure 10 The aerosol generating device 7 may include at least one of a power supply 71, a control unit 72, a sensor 73, and a susceptor 78. At least one of the power supply 71, the control unit 72, the sensor 73, and the susceptor 78 may be disposed within the main body 70 of the aerosol generating device 7. The main body 70 may provide a space open to the upper side so that a stick S, serving as an aerosol-generating article, may be inserted therein. The susceptor 78 may extend upward around the space into which the stick S is inserted. For example, the susceptor 78 may be in the form of a tube having a hollow interior. The susceptor 78 may be disposed around the insertion space. The susceptor 78 may be arranged to surround at least a portion of the insertion space. The aerosol generating device 7 may include an induction coil 781 surrounding the susceptor 78. The induction coil 781 may cause the susceptor 78 to generate heat.

[0134] In one embodiment, the susceptor 78 may include a hollow space 782 that increases the inductance generated when the susceptor 78 is heated. The hollow space 782 of the susceptor 78 may increase the width of the susceptor 78 when the susceptor 78 is heated, thereby increasing the inductance of the susceptor 78.

[0135] According to one embodiment, an aerosol-generating device 1, 3, 5, 6, or 7 includes: a main body 10, 30, 50, 60, or 70 having an internal space formed on one side for inserting an aerosol-generating article (rod S); a susceptor 18, 38, 58, 68, or 78 housed in the main body and heating the aerosol-generating article; an induction coil 181, 381, 581, 681, or 781 surrounding the susceptor and generating an alternating magnetic field; and a control unit 12, 32, 52, 62, or 72 controlling the operation of the aerosol-generating device and including at least one processor. The susceptor may include a hollow space 182, 382, ​​582, 682, or 782 that increases the inductance of the susceptor when heated.

[0136] In one embodiment, the susceptor includes a rod accommodated in the internal space, the rod protruding toward an opening of the internal space, the hollow space being formed inside the rod along a length direction of the rod, and heating the susceptor can increase a width of the susceptor.

[0137] The rod may have a cylindrical shape.

[0138] A thread 383, 683 may be formed on the surface of the rod.

[0139] The threads may be formed along the length of the rod.

[0140] In one embodiment, the rod may be constructed of a ferromagnetic material.

[0141] In an embodiment, the susceptors 58, 68 may be included within the aerosol-generating article.

[0142] The susceptor comprises a rod formed along the length of the aerosol-generating article, the hollow is formed inside the rod along the length of the rod, and the width of the susceptor can be increased by heating the susceptor.

[0143] The surface of the rod may be formed with threads 683 extending along the length of the rod.

[0144] In one embodiment, the susceptor 78 is configured to surround at least a portion of the outer side of the inner space and extend along the length direction of the insertion space. The hollow space 782 is formed inside the susceptor along the length direction of the susceptor, and the outer diameter of the susceptor can be increased by heating the susceptor.

[0145] According to one embodiment, the aerosol generating device 2, 3 includes: a main body 20, 30 having an internal space formed on one side thereof, into which an aerosol generating article (rod S) is inserted; a susceptor 28, 38 housed in the main body and heating the aerosol generating article; an induction coil 281, 381 surrounding the susceptor to generate an alternating magnetic field; and a control unit 22, 32 for controlling the operation of the aerosol generating device and including at least one processor, wherein threads 283, 383 may be formed on the surface of the susceptor so that the inductance increases when the susceptor is heated.

[0146] The susceptor may include a hollow 382 that creates increased inductance.

[0147] Any of the above embodiments or other embodiments of the present disclosure are not mutually exclusive or different. Any of the above embodiments or other embodiments of the present disclosure can be used in combination with each other in terms of their respective configurations or functions.

[0148] For example, this means that configuration A described in a specific embodiment and / or drawing can be combined with configuration B described in another embodiment and / or drawing. That is, even if a combination between configurations is not directly described, it means that the combination is possible unless the description indicates that the combination is impossible.

[0149] The above detailed description should not be interpreted as limiting in all aspects, but should be regarded as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims

1. An aerosol generating device, characterized in that include: a main body, which is formed with an interior space on one side for inserting the aerosol generating article; a susceptor housed within the body and heating the aerosol-generating article; an induction coil surrounding the susceptor and generating an alternating magnetic field; and a control unit that controls the operation of the aerosol generating device and includes at least one processor, The susceptor includes a hollow portion, and the hollow portion increases the inductance of the susceptor when heated.

2. The aerosol generating device according to claim 1, wherein The susceptor includes a rod accommodated in the internal space, the rod protruding toward an opening of the internal space, and the hollow is formed inside the rod along a longitudinal direction of the rod. The width of the susceptor perpendicular to the longitudinal direction is increased by heating.

3. The aerosol generating device according to claim 2, wherein: The rod has a cylindrical shape.

4. The aerosol generating device according to claim 3, wherein: A thread is formed on the surface of the rod.

5. The aerosol generating device according to claim 4, characterized in that The threads are formed along the longitudinal direction.

6. The aerosol generating device according to claim 2, wherein: The rod is composed of a ferromagnetic material.

7. The aerosol generating device according to claim 1, wherein The susceptor is included in the aerosol-generating article.

8. The aerosol generating device according to claim 7, wherein: The susceptor comprises a rod formed in the longitudinal direction of the aerosol-generating article, and the hollow is formed inside the rod in the longitudinal direction. The width of the susceptor perpendicular to the longitudinal direction is increased by heating.

9. The aerosol generating device according to claim 8, characterized in that A thread is formed on the surface of the rod along the longitudinal direction.

10. The aerosol generating device according to claim 1, wherein The susceptor is configured to wrap at least a portion of the outer side of the inner space and extend in the longitudinal direction of the insertion space. The hollow is formed inside the susceptor along the longitudinal direction, The outer diameter of the susceptor is increased by heating.

11. An aerosol generating device, characterized in that: include: a main body, which is formed with an interior space on one side for inserting the aerosol generating article; a susceptor housed within the body and heating the aerosol-generating article; an induction coil surrounding the susceptor and generating an alternating magnetic field; and a control unit that controls the operation of the aerosol generating device and includes at least one processor, A thread is formed on the surface of the susceptor so that inductance increases when the susceptor is heated.

12. The aerosol generating device according to claim 11, wherein: The susceptor includes a hollow portion for increasing inductance.

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