Heater assembly and aerosol-generating device

Abstract

The invention relates to a heater assembly and an aerosol-generating device. A heater assembly according to an embodiment of the present invention includes an oscillation unit that generates microwaves of a predetermined frequency band, a resonance unit that resonates the microwaves to generate an electric field, and a coupler that transmits the generated microwaves to the resonance unit. The resonance part includes a housing including an accommodation space for accommodating an aerosol-generating article and a first opening into which the aerosol-generating article is inserted, a plurality of plates configured to be spaced apart from each other in a circumferential direction of the aerosol-generating article accommodated in the accommodation space, and a connection part configured to connect the plurality of plates to the housing. A second opening corresponding to the first opening is provided at a position facing the first opening, and connects the plurality of plates and the housing.

Description

Technical Field

[0001] Embodiments relate to a heater assembly that can heat an aerosol-generating article by dielectric heating to generate an aerosol and an aerosol-generating device including the heater assembly. Background Art

[0002] Recently, there has been an increasing demand for alternative methods that overcome the disadvantages of conventional cigarettes. For example, there is an increasing demand for systems that generate aerosol by heating cigarettes (or "aerosol generating articles") using an aerosol generating device rather than burning the cigarette.

[0003] Aerosol generating devices that generate aerosol by heating an aerosol generating substance using resistance heating or induction heating are common, but recently, dielectric heating aerosol generating devices that heat an aerosol generating substance using microwaves have been proposed.

[0004] The dielectric heating aerosol generating device is a device that can generate heat in a dielectric contained in an aerosol generating substance by resonance of microwaves and heat the aerosol generating substance by the heat generated in the dielectric.

[0005] In the case of the dielectric heating method, since it is observed that the resonance peak appears at a specific position of the resonator, it is preferable to place the tobacco rod of the aerosol generating article in the area where the resonance peak appears to achieve optimal heating. In addition, since the aerosol generating article has different shapes and sizes, a resonator structure that can adapt to the shape and size is required. Summary of the invention

[0006] Problem that the invention aims to solve

[0007] According to an embodiment of the present application, a heater assembly and an aerosol generating device including a structure that can adapt to the shape and size of an aerosol generating article may be provided.

[0008] Technical problems to be solved by the embodiments of the present invention are not limited to the above-mentioned problems, and those of ordinary skill in the art will clearly understand unmentioned problems from the present specification and the accompanying drawings.

[0009] Means used to solve problems

[0010] A heater assembly according to an embodiment of the present invention includes: an oscillating portion that generates microwaves in a specified frequency band, a resonating portion that resonates the microwaves to generate an electric field, and a coupler that transmits the generated microwaves to the resonating portion. The resonating portion includes: a housing that includes a storage space for storing an aerosol generating article and a first opening for inserting the aerosol generating article, a plurality of plates that are arranged to be spaced apart from each other along a circumferential direction of the aerosol generating article stored in the storage space, and a connecting portion that connects the plurality of plates to the housing and includes a second opening corresponding to the first opening at a position facing the first opening.

[0011] An aerosol generating device according to an embodiment of the present invention comprises: a housing including an insertion hole for inserting an aerosol generating article, and a heater assembly for heating the aerosol generating article inserted through the insertion hole.

[0012] The heater assembly includes: an oscillating portion, which generates microwaves in a specified frequency band, a resonating portion, which makes the microwaves resonate to generate an electric field, and a coupler, which is used to transfer the generated microwaves to the resonating portion; the resonating portion includes: a shell, which includes a storage space for storing the aerosol generating article and a first opening for inserting the aerosol generating article, a plurality of plates, which are configured to be spaced apart from each other along the circumferential direction of the aerosol generating article stored in the storage space, and a connecting portion, which connects the plurality of plates with the shell and includes a second opening corresponding to the first opening at a position facing the first opening.

[0013] Effects of the Invention

[0014] The heater assembly and the aerosol generating device according to the embodiment of the present application can adaptably cope with the shape and size of the aerosol generating article by including a resonator with both ends open.

[0015] Effects according to the embodiments are not limited to the above-mentioned effects, and those having ordinary skill in the art will clearly understand unmentioned effects from the present specification and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of an aerosol generating device according to an embodiment.

[0017] Figure 2 is an internal block diagram of an aerosol generating device according to an embodiment.

[0018] Figure 3 yes Figure 2 Internal block diagram of the dielectric heating section.

[0019] Figure 4 and Figure 5 is a diagram showing an example of an aerosol-generating article.

[0020] Figure 6 is a perspective view schematically showing a heater assembly according to an embodiment.

[0021] Figure 7 FIG. 1 is a perspective view schematically showing a heater assembly according to another embodiment with a portion thereof cut away.

[0022] Figure 8 This is a schematic diagram showing the decomposition Figure 7 0 is a perspective view of constituent elements of a heater assembly according to an embodiment shown in FIG.

[0023] Fig. 9 The figures are used to explain the different lengths of the extractors into which the aerosol-generating articles of different lengths are inserted.

[0024] Fig.10 It is a figure for demonstrating the extractor which includes a hole part.

[0025] Fig.11A , Fig. 11B and Fig. 11C They are Figure 7 The heater assembly shown in FIG. Fig. 9 A cross-sectional view of the state of the extractor shown in FIG.

[0026] Fig.12 It is a schematic representation Fig.11A A perspective view of an electric field distribution of a heater assembly according to an embodiment is shown in FIG.

[0027] Fig.13 It is a schematic representation Fig.11A A perspective view of the heating density distribution of an aerosol-generating article heated by a heater assembly according to an embodiment is shown in FIG.

[0028] Fig.14 is a perspective view schematically showing a heater assembly according to another embodiment.

[0029] Description of Reference Numerals

[0030] 10, 20: Aerosol-generating articles

[0031] 300: Heater assembly

[0032] 320: Resonance

[0033] 311: Coupler

[0034] 321a: First opening

[0035] 321b: Second opening

[0036] 321: Shell

[0037] 322: Connection

[0038] 323a: First board

[0039] 323b: Second board DETAILED DESCRIPTION

[0040] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings. Regardless of the figure numbers, the same or similar components are given the same figure numbers, and repeated description thereof will be omitted.

[0041] The suffixes "module" and "unit" of the constituent elements used in the following description are only given or used interchangeably in consideration of the convenience of completing the description, and they themselves do not have different meanings or functions from each other.

[0042] In addition, when describing the embodiments disclosed in this specification, if it is determined that the specific description of the related known technology makes the subject matter of the embodiments disclosed in this specification unclear, the detailed description will be omitted. In addition, the drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the drawings, and it should be understood that all changes, equivalents and substitutes within the ideas and technical scope of this disclosure are included.

[0043] Terms including ordinal numbers such as first, second, etc. may be used to describe various components, but the components are not limited to the terms. The terms are only used to distinguish one component from other components.

[0044] When a certain component is “connected” or “joined” to another component, it should be understood that it can be directly connected or joined to the other component, and other components may exist between the two. On the contrary, when a certain component is “directly connected” or “directly joined” to another component, it should be understood that there are no other components between the two.

[0045] Unless the context clearly indicates otherwise, an expression in the singular includes an expression in the plural form.

[0046] Figure 1 is a perspective view of an aerosol generating device according to an embodiment.

[0047] Reference Figure 1 According to an embodiment, an aerosol generating device 100 may include: a housing 110 capable of accommodating an aerosol generating article 10 ; and a heater assembly 200 for heating the aerosol generating article 10 accommodated in the housing 110 .

[0048] The housing 110 may form the overall appearance of the aerosol generating device 100, and the components of the aerosol generating device 100 may be arranged in the internal space (or "installation space") of the housing 110. For example, the internal space of the housing 110 may be equipped with a heater assembly 200, a battery, a processor and / or a sensor, but the components arranged in the internal space are not limited thereto.

[0049] An insertion hole 110h may be formed in a region of the housing 110, and at least a portion of the aerosol generating article 10 may be inserted into the interior of the housing 110 through the insertion hole 110h. For example, the insertion hole 110h may be formed in a region of the upper end surface (e.g., the surface facing the z direction) of the housing 110, but the formation position of the insertion hole 110h is not limited thereto. In another embodiment, the insertion hole 110h may also be formed in a region of the side surface (e.g., the surface facing the x direction) of the housing 110.

[0050] The heater assembly 200 may be disposed in the inner space of the housing 110 and heat the aerosol generating article 10 inserted through the insertion hole 110h or accommodated inside the housing 110. For example, the heater assembly 200 may be configured to surround at least a portion of the aerosol generating article 10 inserted or accommodated inside the housing 110 to heat the aerosol generating article 10.

[0051] According to one embodiment, the heater assembly 200 can heat the aerosol generating article 10 by dielectric heating. The "dielectric heating method" in the present disclosure refers to a method of heating a dielectric as a heat receiving body by using microwaves and / or the resonance of the electric field (or magnetic field) of microwaves. Microwaves, as an energy source for heating the heat receiving body, are generated by high-frequency power, and therefore, microwaves and microwave power can be used interchangeably hereinafter.

[0052] Inside the heater assembly 200, the charges or ions of the dielectric included in the aerosol generating article 10 may vibrate or rotate due to microwave resonance, and the heat generated in the dielectric due to the frictional heat generated by the charges or ions during the vibration or rotation process may heat the aerosol generating article 10.

[0053] As the aerosol-generating article 10 is heated by the heater assembly 200, an aerosol may be generated from the aerosol-generating article 10. In the present disclosure, "aerosol" may refer to gas particles generated by mixing air and steam generated when the aerosol-generating article 10 is heated.

[0054] The aerosol generated from the aerosol generating article 10 may be discharged to the outside of the aerosol generating device 100 through the aerosol generating article 10 or through an empty space between the aerosol generating article 10 and the insertion hole 110h. The user contacts an area of ​​the aerosol generating article 10 exposed to the outside of the housing 110 with the oral cavity, and may smoke by inhaling the aerosol discharged to the outside of the aerosol generating device 100.

[0055] According to an embodiment, the aerosol generating device 100 may further include: a cover 111, which is movably configured on the housing 110 to open or close the insertion hole 110h. For example, the cover 111 may be slidably coupled to the upper end surface of the housing 110, so that the insertion hole 110h is exposed to the outside of the aerosol generating device 100, or the insertion hole 110h is covered so that the insertion hole 110h cannot be exposed to the outside of the aerosol generating device 100.

[0056] In one example, the cover 111 may expose the insertion hole 110h to the outside of the aerosol generating device 100 in the first position (or "open position"). If the aerosol generating device 100 is exposed to the outside, the aerosol generating article 10 may be inserted into the housing 110 through the insertion hole 110h.

[0057] In another example, the cover 111 may cover the insertion hole 110h at the second position (or "closed position") so that the insertion hole 110h cannot be exposed to the outside of the aerosol generating device 100. At this time, when the aerosol generating device 100 is not in use, the cover 111 may prevent external foreign matter from flowing into the interior of the heater assembly 200 through the insertion hole 110h.

[0058] Figure 1 2 and 3 , only the aerosol generating device 100 for heating the aerosol generating article 10 in a solid state is shown, but the aerosol generating device 100 is not limited to the illustrated embodiment.

[0059] The aerosol generating device according to another embodiment may also generate aerosol by heating the aerosol generating substance in a liquid or gel state of the aerosol generating article 10 in a non-solid state through the heater assembly 200 .

[0060] According to another embodiment, the aerosol generating device includes a heater assembly 200 for heating the aerosol generating article 10 and an aerosol generating substance in a liquid or gel state, and may also include a cartridge (or "vaporizer") for heating the aerosol generating substance. The aerosol generated from the aerosol generating substance may move to the aerosol generating article 10 through an airflow channel connecting the cartridge and the aerosol generating article 10, and after mixing with the aerosol generated by the aerosol generating article 10, pass through the aerosol generating article 10 and pass to the user.

[0061] Figure 2 is an internal block diagram of an aerosol generating device according to an embodiment.

[0062] Reference Figure 2 The aerosol generating device 100 may include an input unit 102, an output unit 103, a sensor unit 104, a communication unit 105, a memory 106, a battery 107, an interface unit 108, a power conversion unit 109, and a dielectric heating unit 200. However, the internal structure of the aerosol generating device 100 is not limited to Figure 2 According to the design of the aerosol generating device 100, the Figure 2 Part of the shown composition, or further adding new composition.

[0063] The input unit 102 may receive user input. For example, the input unit 102 may be configured as a single pressure-type button. As another example, the input unit 102 may be a touch panel including at least one touch sensor. The input unit 102 may transmit an input signal to the processor 101. The processor 101 may supply power to the dielectric heating unit 200 based on the user input, or may output a user notification by controlling the output unit 103.

[0064] The output unit 103 may output information about the state of the aerosol generating device 100. The output unit 103 may output the charge / discharge state of the battery 107, the heating state of the dielectric heating unit 200, the insertion state of the aerosol generating article 10, and error information of the aerosol generating device 100. To this end, the output unit 103 may include a display, a haptic motor, and an audio output unit.

[0065] The sensor unit 104 can sense the state of the aerosol generating device 100 or the surrounding state of the aerosol generating device 100 and send the sensed information to the processor 101. The processor 101 can control the aerosol generating device 100 based on the sensed information to perform various functions such as heating control of the dielectric heating unit 200, smoking restriction, insertion judgment of the aerosol generating article 10, notification display, etc.

[0066] The sensor part 104 may include a temperature sensor, a suction sensor, and an insertion sensing sensor.

[0067] The temperature sensor may sense the temperature inside the dielectric heating portion 200 in a non-contact manner, or may directly acquire the temperature of the resonator by contacting the dielectric heating portion 200. According to an embodiment, the temperature sensor may also sense the temperature of the aerosol generating article 10. In addition, the temperature sensor may be arranged adjacent to the battery 107 to acquire the temperature of the battery 107. The processor 101 may control the power supply to the dielectric heating portion 200 based on the temperature information of the temperature sensor.

[0068] The suction sensor can sense the user's suction. The suction sensor can sense the user's suction based on at least one change in temperature change, flow change, power change, and pressure change. The processor 101 can control the power supply to the dielectric heating unit 200 based on the suction information of the suction sensor. For example, the processor 101 counts the number of puffs, and when the number of puffs reaches a preset maximum number of puffs, the power supply to the dielectric heating unit 200 can be blocked. As another example, when no puff is sensed to last for more than a preset time, the processor 101 can block the power supply to the dielectric heating unit 200.

[0069] The insertion sensing sensor can be arranged in the receiving space ( Figure 4 The insertion sensing sensor may be configured inside the insertion hole 110h or adjacent to the accommodation space 220h to be able to sense the insertion and removal of the aerosol generating article 10 accommodated in the insertion hole 110h. For example, the insertion sensing sensor may include an inductive sensor and / or a capacitive sensor. When the aerosol generating article 10 is inserted into the insertion hole 110h, the processor 101 may supply power to the dielectric heating portion 200.

[0070] According to an embodiment, the sensor unit 104 may further include a reuse sensing sensor, a motion sensing sensor, a humidity sensor, an air pressure sensor, a magnetic sensor, a cover removal sensing sensor, a position sensor (GPS), and a proximity sensor, etc. The functions of each sensor can be intuitively inferred from their names, so a specific description will be omitted.

[0071] The communication unit 105 may include at least one communication module for communicating with an external electronic device. The processor 101 may send information of the aerosol generating device 100 to the external electronic device by controlling the communication unit 105. Alternatively, the processor 101 may receive information from the external electronic device through the communication unit 105 to control the components included in the aerosol generating device 100. For example, the transmission information between the communication unit 105 and the external electronic device may include user authentication information, firmware update information, user smoking pattern information, etc.

[0072] The memory 106 is hardware for storing various data processed in the aerosol generating device 100, and can store data processed in the processor 101 and data to be processed. For example, the memory 106 can store data such as the working time of the aerosol generating device 100, the maximum number of puffs, the current number of puffs, at least one temperature distribution, and the smoking pattern of the user.

[0073] The battery 107 can supply power to the dielectric heating unit 200 to heat the aerosol generating article 10. In addition, the battery 107 can supply power required for the operation of other components provided in the aerosol generating device 100. The battery 107 can be a rechargeable battery or a detachable battery.

[0074] The interface unit 108 may include a connection terminal that can be physically connected to an external electronic device. The connection terminal may include at least one of an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector), or a combination thereof. The interface unit 108 may send / receive information or charge with an external electronic device through the connection terminal.

[0075] The power conversion section 109 may convert the DC power received from the battery 107 into AC power. In addition, the power conversion section 109 may provide the converted AC power to the dielectric heating section 200. The power conversion section 109 may be an inverter including at least one switching element, and the processor 101 may convert the DC power into AC power by controlling the ON / OFF of the switching element included in the power conversion section 109. The power conversion section 109 may be configured as a full-bridge or a half-bridge.

[0076] The dielectric heating unit 200 can heat the aerosol generating article 10 by dielectric heating. Figure 1 The heater assembly 200 has a corresponding structure.

[0077] The dielectric heating unit 200 can heat the aerosol generating article 10 using microwaves and / or microwave electric fields (hereinafter referred to as microwaves or microwave power if no distinction is necessary). The dielectric heating unit 200 can heat the aerosol generating article 10 by generating microwaves in a resonant structure, rather than by radiating microwaves using an antenna. The resonant structure will refer to Figure 6 This will be described later.

[0078] The dielectric heating unit 200 can output high-frequency microwaves to the resonance unit ( Figure 3 The microwave may be a power of an industrial, scientific and medical equipment (ISM) frequency band that is allowed to be used for heating, but is not limited thereto. The resonating portion 220 may be designed by considering the wavelength of the microwave so that the microwave can resonate in the resonating portion 220.

[0079] The aerosol generating article 10 is inserted into the resonance part 220, and the dielectric material in the aerosol generating article 10 can be heated by the resonance part 220. For example, the aerosol generating article 10 may include a polar material, and the molecules in the polar material may be polarized inside the resonance part 220. The molecules may vibrate or rotate by the polarization phenomenon, and the aerosol generating article 10 may be heated by friction heat or the like generated in the process. Figure 3 , the dielectric heating unit 200 is described in more detail.

[0080] The processor 101 can control the overall operation of the aerosol generating device 100. The processor 101 can be implemented as an array of multiple logic gates, or can be implemented as a combination of a general-purpose microprocessor and a memory storing programs executable by the microprocessor. In addition, it can also be implemented by other forms of hardware.

[0081] The processor 101 can control the direct current supplied by the battery 107 to the power conversion unit 109 and / or the alternating current supplied by the power conversion unit 109 to the dielectric heating unit 200 according to the required power of the dielectric heating unit 200. In one embodiment, the aerosol generating device 100 may include a converter that steps up or steps down the direct current, and the processor 101 can adjust the magnitude of the direct current by controlling the converter. In addition, the processor 101 can control the alternating current supplied to the dielectric heating unit 200 by adjusting the switching frequency and duty cycle of the switching element included in the power conversion unit 109.

[0082] The processor 10 can control the heating temperature of the aerosol generating article 10 by controlling the microwave power of the dielectric heating unit 200 and the resonant frequency of the dielectric heating unit 200. Figure 3 The oscillating unit 210 , the isolating unit 240 , the power monitoring unit 250 and the matching unit 260 may also be part of the processor 101 .

[0083] The processor 101 may control the microwave power of the dielectric heating part 200 based on the temperature distribution information stored in the memory 106. In other words, the temperature distribution includes information of the target temperature of the dielectric heating part 200 according to time, and the processor 101 may control the microwave power of the dielectric heating part 200 according to time.

[0084] The processor 101 can adjust the frequency of the microwaves to make the resonant frequency of the dielectric heating unit 200 constant. The processor 101 can track the change of the resonant frequency of the dielectric heating unit 200 according to the heating of the heated object in real time, and can control the dielectric heating unit 200 to output the microwave frequency according to the changed resonant frequency. In other words, the processor 101 can change the microwave frequency in real time regardless of the temperature distribution stored in advance.

[0085] Figure 3 yes Figure 2 Internal block diagram of the dielectric heating section.

[0086] Reference Figure 3 The dielectric heating unit 200 may include an oscillating unit 210, an isolating unit 240, a power monitoring unit 250, a matching unit 260, a microwave output unit 230, and a resonating unit 220. However, the internal structure of the dielectric heating unit 200 is not limited to Figure 3 According to the design of the dielectric heating unit 200, the Figure 3 Part of the shown composition, or further adding new composition.

[0087] The oscillating part 210 may receive alternating current from the power converting part 109 to generate high frequency microwave power. According to an embodiment, the power converting part 109 may be a configuration included in the oscillating part 210. The microwave power may be selected from 915 MHz, 2.45 GHz, and 5.8 GHz frequency bands included in the ISM frequency band.

[0088] The oscillating part 210 includes a solid-state RF generating device, and microwave power can be generated by the device. The solid-state RF generating device can be implemented by a semiconductor. If the oscillating part 210 is implemented by a semiconductor, there is an advantage that the dielectric heating part 200 can be miniaturized and the device life is increased.

[0089] The oscillating part 210 can output microwave power to the resonating part 220. The oscillating part 210 includes a power amplifier (power amp) that increases or decreases the microwave power, and the power amplifier can adjust the size of the microwave power under the control of the processor 101. For example, the power amplifier can reduce or increase the amplitude of the microwave. As the amplitude of the microwave is adjusted, the microwave power can also be adjusted.

[0090] The processor 101 may adjust the magnitude of the microwave power output from the oscillating portion 210 based on the temperature profile stored in advance. For example, the temperature profile includes target temperature information according to the preheating interval and the smoking interval, and the oscillating portion 210 may supply microwave power at a first power in the preheating interval and supply microwave power at a second power smaller than the first power in the smoking interval.

[0091] The isolation part 240 can block the microwave power input from the resonance part 220 to the oscillation part 210. Most of the microwave power output from the oscillation part 210 is absorbed by the heat receiving body, but according to the heating mode of the heat receiving body, a part of the microwave power can be reflected by the heat receiving body to be re-transmitted in the direction of the oscillation part 210. This is because the impedance from the oscillation part 210 to the resonance part 220 changes as the polar molecules according to the heating of the heat receiving body are exhausted. "The impedance from the oscillation part 210 to the resonance part 220 changes" may have the same meaning as "the resonant frequency of the resonance part 220 changes". When the microwave power reflected from the resonance part 220 is input to the oscillation part 210, not only the oscillation part 210 will fail, but also the desired output performance cannot be exerted. The isolation part 240 does not return the microwave power reflected from the resonance part 220 to the oscillation part 210, but guides it in a predetermined direction and absorbs it. To this end, the isolation part 240 may include a circulator and a dummy load.

[0092] The power monitoring unit 250 may monitor the microwave power output from the oscillating unit 210 and the reflected microwave power reflected from the resonating unit 220 , respectively. The power monitoring unit 250 may send information of the microwave power and the reflected microwave power to the matching unit 260 .

[0093] The matching part 260 may match the impedance from the oscillation part 210 to the resonance part 220 with the impedance from the resonance part 220 to the oscillation part 210 to minimize the reflected microwave power. Impedance matching may have the same meaning as "making the frequency of the oscillation part 210 consistent with the resonant frequency of the resonance part 220". Therefore, the matching part 260 may change the frequency of the oscillation part 210 in order to match the impedance. In other words, the matching part 260 may adjust the frequency of the microwave power output from the oscillation part 210 to minimize the reflected microwave power. The impedance matching of the matching part 260 may be performed in real time regardless of the temperature distribution.

[0094] In addition, the oscillating unit 210, the isolating unit 240, the power monitoring unit 250 and the matching unit 260 described above can be implemented as a microwave source in the form of a chip as separate components distinguished from the microwave output unit 230 and the resonating unit 220 described later. In addition, according to an embodiment, the oscillating unit 210, the isolating unit 240, the power monitoring unit 250 and the matching unit 260 described above can also be implemented as a partial component of the processor 101.

[0095] The microwave output unit 230 is a structure for inputting microwave power to the resonance unit 220, and can be Figure 3The microwave output unit 230 may be implemented in the form of SMA, SMB, MCX, or MMCX connectors. The microwave output unit 230 transmits the microwave power generated in the microwave source to the resonator 220 by connecting the microwave source in the form of a chip to the resonator 220.

[0096] The resonating part 220 can heat the heated object by forming microwaves in the resonant structure. The resonating part 220 includes a housing space for housing the aerosol generating article 10, and the aerosol generating article 10 can be exposed to microwaves for dielectric heating. For example, the aerosol generating article 10 can include a polar material, and the molecules in the polar material can be polarized by microwaves inside the resonating part 220. The molecules can vibrate or rotate through the polarization phenomenon, and the aerosol generating article 10 can be heated by friction heat or the like generated in the process.

[0097] The resonance part 220 includes at least one internal conductor to enable microwaves to be resonated, and the microwaves may be resonated inside the resonance part 220 according to the configuration, thickness, length, etc. of the internal conductor.

[0098] The resonant part 220 may include a dielectric storage space. The dielectric storage space is a structure different from the storage space of the aerosol generating article 10, in which a material that can change the overall resonant frequency of the resonant part 220 and miniaturize the resonant part 220 is configured. In one embodiment, the dielectric storage space can accommodate a dielectric with low microwave absorptivity. This is to prevent the phenomenon that the energy that should be transferred to the heated body is transferred to the dielectric and the dielectric itself is heated. Microwave absorptivity can be expressed as a loss tangent, which is the ratio of the imaginary part to the real part of the complex dielectric constant. In one embodiment, a dielectric having a loss tangent below a preset size can be accommodated in the dielectric storage space 327, and the preset size can be 1 / 100. For example, the dielectric can be at least any one of quartz, polytetrafluoroethylene and alumina or a combination thereof, but is not limited thereto.

[0099] Below, refer to Figure 4 and Figure 5 , examples of aerosol generating articles 10 and 20 are described.

[0100] Figure 4 and Figure 5 is a diagram showing an example of an aerosol-generating article.

[0101] Reference Figure 4 The aerosol generating article 10 includes a tobacco rod 11 and a filter rod 12 .

[0102] Figure 4 The filter rod 12 is shown as a single-segment structure, but is not limited thereto. In other words, the filter rod 12 can be composed of multiple segments. For example, the filter rod 12 can include a first segment for cooling the aerosol and a second segment for filtering the specified components included in the aerosol. In addition, according to demand, the filter rod 12 can also include at least one segment that performs other functions.

[0103] The aerosol generating article 10 can be wrapped with at least one wrapping paper 14. At least one hole for the outside air to flow in or the internal gas to flow out can be formed in the wrapping paper 14. As an example, the aerosol generating article 10 can be wrapped with one wrapping paper 14. As another example, the aerosol generating article 10 can be wrapped with two or more wrapping papers 14 overlapping each other. For example, the tobacco rod 11 can be wrapped with the first wrapping paper 14a, and the filter rod 12 can be wrapped with wrapping papers 14b, 14c, and 14d. In addition, the entire aerosol generating article 10 can be wrapped again with a single wrapping paper 14e. If the filter rod 12 is composed of multiple sections, each section can be wrapped with wrapping papers 14b, 14c, and 14d.

[0104] The tobacco rod 11 contains an aerosol-generating substance. For example, the aerosol-generating substance may contain at least one of glycerol, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. In addition, the tobacco rod 11 may contain other additives such as flavoring agents, humectants, and / or organic acids. In addition, a flavoring liquid such as menthol or a humectant may be added to the tobacco rod 11 by spraying it.

[0105] The tobacco rod 11 can be made in many ways. For example, the tobacco rod 11 can be made of sheet material, strand material. In addition, the tobacco rod 11 can be made of tobacco leaves obtained by cutting tobacco sheets into small pieces.

[0106] The length of the tobacco rod 11 according to an embodiment can be made in a variety of ways according to design requirements. For example, the length of the tobacco rod 11 can be about 15 mm and about 25 mm.

[0107] The filter rod 12 may be a cellulose acetate filter. In addition, the shape of the filter rod 12 is not limited. For example, the filter rod 12 may be a cylindrical rod, or a tubular rod having a hollow portion therein. In addition, the filter rod 12 may be an embedded rod. If the filter rod 12 is composed of a plurality of segments, at least one of the plurality of segments may be made into a different shape.

[0108] The filter rod 12 may also be made to produce a flavor. For example, a flavoring liquid may be sprayed onto the filter rod 12, or another fiber coated with a flavoring liquid may be inserted into the filter rod 12.

[0109] In addition, the filter rod 12 may include at least one capsule 13. The capsule 13 may generate fragrance or aerosol. For example, the capsule 13 may be a structure in which a liquid containing fragrance is wrapped with a membrane. The capsule 13 may have a spherical or cylindrical shape, but is not limited thereto.

[0110] If the filter rod 12 includes a section for cooling the aerosol, the cooling section may be made of a polymer or a biodegradable polymer. For example, the cooling section may be made of pure polylactic acid only, but is not limited thereto. Alternatively, the cooling section may be made of a cellulose acetate filter with a plurality of holes. However, the cooling section is not limited to the above examples, and is not particularly limited as long as it can perform the function of cooling the aerosol.

[0111] Reference Figure 5 The aerosol generating article 20 may further include a front end plug 23. In the tobacco rod 21, the front end plug 23 may be located on the side opposite to the filter rod 22. The front end plug 23 may prevent the tobacco rod 21 from being separated from the outside, and may prevent the liquefied aerosol from flowing from the tobacco rod 21 into the aerosol generating device (or, heater assembly) during smoking.

[0112] The filter rod 22 may include a first section 22a and a second section 22b. Figure 4 The first section of the filter rod 12 corresponds to the second section 22b. Figure 4 Corresponding to the second section of the filter rod 12.

[0113] According to an embodiment, the length of the front end plug 23 may be shorter than the length of the tobacco rod 21. For example, when the length of the tobacco rod 11 is about 15 mm, the length of the front end plug 23 may be about 7 mm.

[0114] The aerosol generating article 20 may be wrapped with at least one wrapping paper 25. The wrapping paper 25 may be formed with at least one hole for the inflow of external air or the outflow of internal gas. For example, the front end plug 23 may be wrapped with a first wrapping paper 25a, the tobacco rod 21 may be wrapped with a second wrapping paper 25b, the first section 22a may be wrapped with a third wrapping paper 25c, and the second section 22b may be wrapped with a fourth wrapping paper 25d. Furthermore, the entire aerosol generating article 20 may be wrapped again with a fifth wrapping paper 25e.

[0115] In addition, the fifth wrapping paper 25e may be formed with at least one perforation 26. For example, the perforation 26 may be formed in a region surrounding the tobacco rod 21, but is not limited thereto.

[0116] In addition, the second section 22b may include at least one capsule 24. The capsule 24 may generate fragrance or aerosol. For example, the capsule 24 may be a structure in which a liquid containing fragrance is wrapped with a film. The capsule 24 may have a spherical or cylindrical shape, but is not limited thereto.

[0117] Figure 6 is a perspective view schematically showing a heater assembly according to an embodiment.

[0118] according to Figure 6 The heater assembly 300 of the illustrated embodiment may include a resonance portion 320 generating microwave resonance and a coupler 311 supplying microwaves to the resonance portion 320 .

[0119] The resonating part 320 may include: a housing 321 ; a plurality of plates 323 a , 323 b ; and a connecting part 322 connecting the plurality of plates 323 a , 323 b and the housing 321 .

[0120] The coupler 311 may supply microwaves to at least one of the plurality of plates 323 a , 323 b to generate microwave resonance in the resonance portion 320 .

[0121] The resonating portion 320 may surround at least one region of the aerosol generating article 10 inserted into the aerosol generating device. The coupler 311 may supply microwaves generated in the oscillating portion (not shown) to the resonating portion 320. When microwaves are supplied to the resonating portion 320, microwave resonance is generated in the resonating portion 320, so that the resonating portion 320 may heat the aerosol generating article 10. For example, a dielectric included in the aerosol generating article 10 may generate heat due to an electric field generated inside the resonating portion 220 by the microwaves, and the aerosol generating article 10 may be heated due to the heat generated in the dielectric.

[0122] Since the housing 321 of the resonance part 320 is formed to have a hollow shape with a hollow interior, the components of the resonance part 320 can be arranged inside the housing 321 .

[0123] The housing 321 may include: a storage space 320h that can store the aerosol generating article 10; and a first opening 321a for inserting the aerosol generating article 10. The first opening 321a is connected to the storage space 320h. Since the first opening 321a is open to the outside of the housing 321, the storage space 320h is connected to the outside through the first opening 321a. Therefore, the aerosol generating article 10 can be inserted into the storage space 320h of the housing 321 through the first opening 321a of the housing 321.

[0124] Although the housing 321 shown in the drawings has a square cross-sectional shape, the shape of the housing 321 can be deformed into various shapes. For example, the housing 321 can be deformed into various cross-sectional shapes such as a rectangle, an ellipse or a circle. The housing 321 can extend longer in one direction.

[0125] A plurality of plates 323 a and 323 b may be disposed inside the housing 321 .

[0126] The plurality of plates 323a, 323b may be arranged to be spaced apart from each other along the circumferential direction of the aerosol generating article 10 accommodated in the accommodation space 320h. The plurality of plates 323a, 323b may include: a first plate 323a arranged to surround an area of ​​the aerosol generating article 10; and a second plate 323b arranged to surround another area of ​​the aerosol generating article 10.

[0127] The plurality of plates 323a, 323b may be connected to the housing 321 through the connection portion 322. In addition, one end of a first plate 323a and one end of a second plate 323b among the plurality of plates 323a, 323b may be connected to each other through the connection portion 322.

[0128] The connecting portion 322 includes a second opening 321b corresponding to the first opening 321a at a position opposite to the first opening 321a. The second opening 321b can be formed in the connecting portion 322 to be in fluid communication with the first opening 321a. For example, the second opening 321b can be aligned with the open end of the other end 323af of the plurality of plates 323a, 323b and the first opening 321a in the length direction of the aerosol generating article 10. Therefore, according to one embodiment, one end of the aerosol generating article 10 can be inserted through the first opening 321a of the shell 321 and pass through the second opening 321b of the connecting portion 322. At this time, a band (not shown) indicating the insertion position may be included on the outer peripheral surface of the aerosol generating article 10. When the band of the aerosol generating article 10 is located at the front end of the first opening 321a, the tobacco rod 11 can be configured to correspond to the area with the strongest electric field.

[0129] According to an embodiment, the shape and size of the second opening 321b may correspond to the shape and size of the first opening 321a. For example, if the first opening 321a has a circular shape, the second opening 321b also has a circular shape, and the inner diameter of the first opening 321a and the inner diameter of the second opening 321b may be substantially the same.

[0130] One end of the first plate 323a and one end of the second plate 323b among the plurality of plates 323a and 323b may be arranged along the circumference of the second opening 321b of the connecting portion 322. In addition, the other end 323af of the first plate 323a and the other end 323bf of the second plate 323b among the plurality of plates 323a and 323b are separated from each other and may be open. By connecting the plurality of plates 323a and 323b to the connecting portion 322, a resonator assembly may be formed.

[0131] A plurality of plates 323a and 323b may be disposed on one side of the connection portion 322, and a tubular protrusion 321c extending from the second opening 321b may be included on the other side of the connection portion 322. The tubular protrusion 321c may be aligned with the second opening 321b, the open ends of the other ends 323af of the plurality of plates 323a and 323b, and the first opening 321a in the length direction of the aerosol generating article 10.

[0132] The resonator 320 may include a closed end (short end) with a closed end surface and an open end (open end) located in the opposite direction of the closed end and having at least one region of the end surface open to have a length (λ / 4) of 1 / 4 of the wavelength (λ) of the microwave.

[0133] exist Figure 6 The region at one end of the resonance portion 320 corresponding to the left region has a structure that substantially prevents microwaves from being emitted to the outside through the tubular protrusion 321c, thereby forming a closed end. Figure 6 The region at the other end of the resonance part 320 corresponding to the right region has a structure in which a plurality of plates 323a and 323b are open, thereby forming an open end. By the structure of the resonance part 320 as described above, the resonance part 320 can work as a resonator having a length of 1 / 4 wavelength of microwaves.

[0134] The plurality of plates 323a, 323b extend in the longitudinal direction of the aerosol-generating article 10. At least a portion of the plurality of plates 323a, 323b may be bent so as to protrude outward from the center of the aerosol-generating article 10 in the longitudinal direction.

[0135] For example, when the aerosol generating article 10 is manufactured into a cylindrical shape, the plurality of plates 323a, 323b may be formed to be curved in the circumferential direction along the outer peripheral surface of the aerosol generating article 10. The radius of curvature of the cross section of the plurality of plates 323a, 323b may be the same as the radius of curvature of the aerosol generating article 10. The radius of curvature of the cross section of the plurality of plates 323a, 323b may be variously deformed. For example, the radius of curvature of the cross section of the plurality of plates 323a, 323b may be greater than or less than the radius of curvature of the aerosol generating article 10.

[0136] When a structure in which the plurality of plates 323 a and 323 b are bent in the circumferential direction along the outer peripheral surface of the aerosol-generating article 10 is used, a more uniform electric field can be formed in the resonance portion 320 , and thus the heater assembly 300 can uniformly heat the aerosol-generating article 10 .

[0137] The open ends of the other ends of the plurality of plates 323a, 323b may be disposed toward the first opening 321a of the housing 321. The first opening 321a of the housing 321 may be disposed apart from the other ends of the plurality of plates 323a, 323b in a direction away from the other ends of the plurality of plates 323a, 323b.

[0138] The open ends of the other ends of the plurality of plates 323a, 323b may be aligned with the first opening 321a of the housing 321. Therefore, when the aerosol generating article 10 is inserted through the first opening 321a of the housing 321 to be located in the accommodation space 320h, a portion of the aerosol generating article 10 located in the accommodation space 320h may be surrounded by the plurality of plates 323a, 323b.

[0139] Two of the plurality of plates 323a, 323b may be arranged at opposite positions relative to the lengthwise center of the aerosol generating article 10. The embodiment is not limited by the number of the plurality of plates 323a, 323b, for example, the number of the plurality of plates 323a, 323b may be three or more than four.

[0140] The plurality of plates 323 a and 323 b may be arranged symmetrically with respect to a central axis in the longitudinal direction of the aerosol-generating article 10 (ie, the direction in which the aerosol-generating article 10 extends).

[0141] At least one of the plurality of plates 323a, 323b may be in contact with the coupler 311 connected to the oscillating portion (not shown). Specifically, at least a portion of the first plate 323a may be in contact with the coupler 311. When the microwave is transmitted to the first plate 323a through the coupler 311, the resonance of the microwave is formed between the plurality of plates 323a, 323b. In addition, the resonance of the microwave is also formed between the first plate 323a and the upper side plate of the housing 321 and between the second plate 323b and the lower side plate of the housing 321. Therefore, electric fields can be generated between the plurality of plates 323a, 323b and the connecting portion 322, between the first plate 323a and the upper side plate of the housing 321, and between the second plate 323b and the lower side plate of the housing 321.

[0142] The coupler 311 does not contact the housing 321 but penetrates the housing 321 , so that one end of the coupler 311 may contact the oscillating part (not shown) and the other end of the coupler 311 may contact an area of ​​the first plate 323 a .

[0143] As microwaves generated in the oscillation portion (not shown) are transferred to the plurality of plates 323 a , 323 b and the connection portion 322 through the coupler 311 , an electric field may be generated inside the assembly of the plurality of plates 323 a , 323 b and the connection portion 322 .

[0144] In addition, according to the structure of the resonating part 320 of the heater assembly 300, a triple resonance mode can be formed in the resonating part 320. A resonance of a transverse electromagnetic mode (TEM mode) of microwaves is formed between the plurality of plates 323a and 323b. In addition, a resonance of a TEM mode different from the resonance formed between the plurality of plates 323a and 323b is formed between the first plate 323a and the upper plate of the housing 321 and between the second plate 323b and the lower plate of the housing 321.

[0145] When triple resonance is generated in the resonance portion 320 of the heater assembly 300 , the aerosol-generating article 10 can be heated more efficiently and uniformly.

[0146] The aerosol generating article 10 inserted into the storage space 320h of the housing 321 is surrounded by the first plate 323a and the second plate 323b, and can be heated by dielectric heating. For example, a portion of the aerosol generating article 10 including a dielectric inserted into the storage space 320h of the housing 321 can be arranged in the space between the first plate 323a and the second plate 323b. The dielectric included in the aerosol generating article 10 generates heat due to the electric field generated in the space between the first plate 323a and the second plate 323b, so that the aerosol generating article 10 can be heated.

[0147] In addition, secondary heating of the aerosol generating article 10 can be achieved according to the effect of the electric field generated by the resonance modes formed between the first plate 323a and the upper plate of the shell 321 and between the second plate 323b and the lower plate of the shell 321.

[0148] When the aerosol generating article 10 is inserted into the interior of the resonance portion 320 through the accommodation space 320h, the tobacco rod 11 of the aerosol generating article 10 may be located between the plurality of plates 323a, 323b.

[0149] The length L4 of the tobacco rod 11 can be formed to be longer than the length L1 of the plurality of plates 323a, 323b. Therefore, the front end 11f of the tobacco rod 11 connected to the filter rod 12 is located at a position protruding more than the other end 323af of the first plate 323a and the other end 323bf of the second plate 323b in the direction toward the first opening 321a of the housing 321.

[0150] A resonance peak is formed at the other end of the plurality of plates 323a, 323b operating as a resonator, and a stronger electric field than other regions can be generated. When the aerosol generating article 10 is inserted into the heater assembly 300, the tobacco rod 11 including a dielectric capable of generating heat due to the electric field is arranged in a manner corresponding to the region with the strongest electric field, thereby improving the heating efficiency (or "dielectric heating efficiency") of the heater assembly 300.

[0151] Reference Figure 6 , the length L1 of the plurality of plates 323a, 323b may be set to be smaller than the length (L1+L2) of the internal space of the housing 321. Therefore, the other ends of the plurality of plates 323a, 323b may be located further inside the housing 321 than the first opening 321a. That is, the other ends of the plurality of plates 323a, 323b may be spaced apart and disposed at a distance L2 from the rear end of the first opening 321a.

[0152] The length of the first opening 321a from the rear end of the first opening 321a connected to the housing 321 to the front end of the first opening 321a where the first opening 321a is open may be L3. The overall length of the housing 321 along the length direction of the housing 321 may be L. The overall length L of the housing 321 may be determined based on the sum of the length L1 of the plurality of plates 323a, 323b, the length L2 between the plurality of plates 323a, 323b and the rear end of the first opening 321a, and the length L3 of the first opening 321a protruding from the housing 321.

[0153] In order to prevent leakage of microwaves, the front end of the first opening 321a is set to protrude from the shell 321 by a length of L3. Since the first opening 321a of the shell 321 protrudes from the shell 321, the first opening 321a can prevent the microwaves inside the shell 321 of the resonance part 320 from leaking to the outside of the shell 321.

[0154] The resonance part 320 may further include a dielectric accommodation space 327 for accommodating a dielectric. The dielectric accommodation space 327 may be formed in an empty space between the housing 321 and the plurality of plates 323a, 323b. A dielectric having low microwave absorption may be accommodated in the dielectric accommodation space 327.

[0155] By disposing a dielectric inside the dielectric accommodating space 327, it is possible to generate an electric field at the same level as the electric field generated in the resonance part without the dielectric while reducing the overall size of the resonance part 320 of the heater assembly 300. That is, by disposing a dielectric inside the dielectric accommodating space 327, the size of the resonance part 320 can be reduced, and the installation space of the resonance part 320 in the aerosol generating device can be reduced, and as a result, the aerosol generating device can be miniaturized.

[0156] Figure 7 is a perspective view schematically showing a partially cutaway view of a heater assembly according to another embodiment, Figure 8 This is a schematic diagram showing the decomposition Figure 7 0 is a perspective view of constituent elements of a heater assembly according to an embodiment shown in FIG.

[0157] according to Figure 7 and Figure 8 The heater assembly of the illustrated embodiment may include a resonating portion 320 generating microwave resonance, and a coupler 311 supplying the microwave generated by the oscillating portion 312 to the resonating portion 320 .

[0158] The housing 321 of the resonance part 320 may include a housing space 320h for housing the aerosol generating article and a first opening 321a for inserting the aerosol generating article. The housing 321 may include a hollow cylindrical shape extending long in a length direction in which the aerosol generating article is inserted.

[0159] One ends of the plurality of plates 323a and 323b of the resonance part 320 may be connected to the housing 321 through the connection part 322. The other ends of the plurality of plates 323a and 323b may be open to the first opening 321a of the housing 321.

[0160] The plurality of plates 323a, 323b may include a first plate 323a and a second plate 323b that are spaced apart from each other in a circumferential direction of the aerosol-generating article accommodated in the accommodation space 320h.

[0161] The plurality of plates 323a, 323b extend in the length direction of the housing 321. At least a portion of the plurality of plates 323a, 323b may be bent so as to protrude outward from the center in the length direction of the accommodating space 320h accommodating the aerosol generating article. The first plate 323a may be bent and extended in the circumferential direction of the aerosol generating article to surround an area of ​​the aerosol generating article. The second plate 323b may be bent and extended in the circumferential direction of the aerosol generating article to surround another area of ​​the aerosol generating article.

[0162] The other end 323af of the first plate 323a and the other end 323bf of the second plate 323b are separated from each other so as to be open. Since the other ends of the plurality of plates 323a and 323b are separated from each other, an open end can be formed at the other ends of the plurality of plates 323a and 323b.

[0163] The open ends of the other ends of the plurality of plates 323a, 323b may be disposed toward the first opening 321a of the housing 321. The first opening 321a of the housing 321 may be spaced apart from the ends of the other ends of the plurality of plates 323a, 323b in a direction away from the ends of the other ends of the plurality of plates 323a, 323b.

[0164] The connecting portion 322 includes a second opening 321b corresponding to the first opening 321a at a position opposite to the first opening 321a. The second opening 321b can be formed in the connecting portion 322 to be in fluid communication with the first opening 321a. For example, the second opening 321b can be aligned with the open end of the other end 323af of the plurality of plates 323a, 323b and the first opening 321a in the length direction of the aerosol generating article 10. Therefore, according to one embodiment, one end of the aerosol generating article 10 can be inserted through the first opening 321a of the shell 321 and pass through the second opening 321b of the connecting portion 322. At this time, a band (not shown) indicating the insertion position may be included on the outer peripheral surface of the aerosol generating article 10. When the band of the aerosol generating article 10 is located at the front end of the first opening 321a, the tobacco rod 11 can be configured to correspond to the area with the strongest electric field.

[0165] According to an embodiment, the shape and size of the second opening 321b may correspond to the shape and size of the first opening 321a. For example, if the first opening 321a has a circular shape, the second opening 321b also has a circular shape, and the inner diameter of the first opening 321a and the inner diameter of the second opening 321b may be substantially the same.

[0166] A plurality of plates 323a and 323b may be provided on one side of the connection portion 322, and a tubular protrusion 321c extending from the second opening 321b may be included on the other side of the connection portion 322. The tubular protrusion 321c may be aligned with the second opening 321b, the open ends of the other ends 323af of the plurality of plates 323a and 323b, and the first opening 321a in the length direction of the aerosol generating article 10.

[0167] One end of the first plate 323a and one end of the second plate 323b among the plurality of plates 323a and 323b may be arranged along the circumference of the second opening 321b of the connecting portion 322. In addition, the other end 323af of the first plate 323a and the other end 323bf of the second plate 323b among the plurality of plates 323a and 323b are separated from each other and may be open. By connecting the plurality of plates 323a and 323b to the connecting portion 322, a resonator assembly may be formed.

[0168] The resonance part 320 may further include a dielectric accommodation space 327 for accommodating a dielectric. The dielectric accommodation space 327 may be formed in an empty space between the housing 321 and the plurality of plates 323a, 323b. The dielectric accommodation space 327 may accommodate a dielectric 324 having low microwave absorption.

[0169] The dielectric 324 may be in the shape of a hollow cylinder. The plurality of plates 323a, 323b are inserted into the hollow space inside the dielectric 324 so that the dielectric 324 can be installed in the dielectric accommodation space 327. The dielectric 324 may protrude further toward the first opening 321a than the other ends of the plurality of plates 323a, 323b in the length direction in which the housing 321 extends.

[0170] By disposing the dielectric 324 inside the dielectric accommodating space 327 of the resonating section 320, it is possible to generate an electric field at the same level as the electric field generated in the resonating section without the dielectric while reducing the overall size of the resonating section 320. That is, by reducing the size of the resonating section 320 by disposing the dielectric 324 inside the dielectric accommodating space 327, it is possible to reduce the installation space of the resonating section 320 in the aerosol generating device, and as a result, the aerosol generating device can be miniaturized.

[0171] The extractor 325 may be disposed inside the plurality of plates 323a, 323b. The extractor 325 may be in the shape of a hollow cylinder with one end closed and the other end open. The extractor 325 may be detachably disposed between the plurality of plates 323a, 323b, and may perform the function of taking out the aerosol generating article from the storage space 320h. For example, when the user finishes smoking, the user may move the extractor 325 toward the front end of the first opening 321a while holding a portion of the extractor 325, so that the extractor 325 and the aerosol generating article may be taken out from the storage space 320h at the same time.

[0172] The extractor 325 has one end closed and the other end open, and the other end thereof may include a stopper 325s protruding outward from the outer circumference of the extractor 325. In other words, since the diameter of the stopper 325s is larger than the diameter of the first opening 321a, when the extractor 325 is inserted into the accommodation space 320h, the movement of the extractor 325 stops when the rear end of the stopper 325s touches the front end of the first opening 321a.

[0173] The length of the extractor 325 from one end to the other may correspond to the length of the aerosol generating article. Figure 4 and Figure 5, the length of the aerosol generating articles 10, 20 may be different as required by the design. According to one embodiment, by setting the length of the filter rods 12, 22 of the aerosol generating articles 10, 20 to a fixed length and setting the length of the tobacco rods 11, 21 of the aerosol generating articles 10, 20 to be different, the overall length of the aerosol generating articles 10, 20 may be made differently. For example, the length of the tobacco rods 11, 21 of the aerosol generating articles 10, 20 may be about 15 mm and about 25 mm. In addition, the overall length of the aerosol generating article 20 may be longer than the overall length of the aerosol generating article 10 by the length of the front end plug 23. For example, the length of the front end plug 23 may be about 7 mm.

[0174] For optimal heating of the aerosol generating articles 10, 20, the tobacco rods 11, 21 may preferably be arranged near the other end of the plurality of plates 323a, 323b forming the resonance peak. Specifically, the front end of the tobacco rods 11, 21 connected to the filter rods 12, 22 may preferably be arranged between the other end of the plurality of plates 323a, 323b and one end of the dielectric 324.

[0175] When the user selects a remover 325 corresponding to the length of the aerosol generating article, inserts the aerosol generating article into the selected remover 325 and then inserts the remover 325 into the accommodating space 320h, the front end of the tobacco rod 11, 21 connected to the filter rod 12, 22 can be arranged between the other end of the multiple plates 323a, 323b and one end of the dielectric 324.

[0176] The heater assembly 300 according to the embodiment of the present invention may include a resonance part 320 with both ends open by including a first opening 321a on the housing 321 and a second opening 321b on the connecting part 322 that is fluidly connected to the first opening 321a. Therefore, even if the length of the tobacco rod 11, 21 and / or the length of the front plug 23 are changed based on the front end of the tobacco rod 11, 21 connected to the filter rod 12, 22, the effect of maintaining the same optimal heating position can be expected. In other words, the more the length of the tobacco rod 11, 21 is increased based on the front end of the tobacco rod 11, 21 connected to the filter rod 12, 22, the closer the rear end of the tobacco rod 11, 21 (or, the front plug 23) is to the second opening 321b side, and the rear end of the tobacco rod 11, 21 (or, the front plug 23) can also be arranged outside through the second opening 321b according to the situation.

[0177] Figure 7 is a perspective view schematically showing a partially cutaway view of a heater assembly according to another embodiment, Figure 8 This is a schematic diagram showing the decomposition Figure 7 0 is a perspective view of constituent elements of a heater assembly according to an embodiment shown in FIG. Fig. 9 The figures are used to explain the different lengths of the extractors into which the aerosol-generating articles of different lengths are inserted.

[0178] according to Figure 7 and Figure 8 The heater assembly of the illustrated embodiment may include a resonance portion 320 that generates microwave resonance, and a coupler 311 that supplies microwaves to the resonance portion 320 .

[0179] The housing 321 of the resonance part 320 may include a housing space 320h for housing the aerosol generating article and a first opening 321a for inserting the aerosol generating article. The housing 321 may include a hollow cylindrical shape extending long in a length direction in which the aerosol generating article is inserted.

[0180] One ends of the plurality of plates 323a and 323b of the resonance part 320 may be connected to the housing 321 through the connection part 322. The other ends of the plurality of plates 323a and 323b may be open to the first opening 321a of the housing 321.

[0181] The plurality of plates 323a, 323b may include a first plate 323a and a second plate 323b that are spaced apart from each other in a circumferential direction of the aerosol-generating article accommodated in the accommodation space 320h.

[0182] The plurality of plates 323a, 323b extend in the length direction of the housing 321. At least a portion of the plurality of plates 323a, 323b may be bent so as to protrude outward from the center in the length direction of the accommodating space 320h accommodating the aerosol generating article. The first plate 323a may be bent and extended in the circumferential direction of the aerosol generating article to surround an area of ​​the aerosol generating article. The second plate 323b may be bent and extended in the circumferential direction of the aerosol generating article to surround another area of ​​the aerosol generating article.

[0183] The other end 323af of the first plate 323a and the other end 323bf of the second plate 323b are separated from each other so as to be open. Since the other ends of the plurality of plates 323a and 323b are separated from each other, an open end can be formed at the other ends of the plurality of plates 323a and 323b.

[0184] The open ends of the other ends of the plurality of plates 323a, 323b may be disposed toward the first opening 321a of the housing 321. The first opening 321a of the housing 321 may be spaced apart from the ends of the other ends of the plurality of plates 323a, 323b in a direction away from the ends of the other ends of the plurality of plates 323a, 323b.

[0185] The connecting portion 322 includes a second opening 321b corresponding to the first opening 321a at a position opposite to the first opening 321a. The second opening 321b can be formed in the connecting portion 322 to be in fluid communication with the first opening 321a. For example, the second opening 321b can be aligned with the open end of the other end 323af of the plurality of plates 323a, 323b and the first opening 321a in the length direction of the aerosol generating article 10. Therefore, according to one embodiment, one end of the aerosol generating article 10 can be inserted through the first opening 321a of the shell 321 and pass through the second opening 321b of the connecting portion 322. At this time, a band (not shown) indicating the insertion position may be included on the outer peripheral surface of the aerosol generating article 10. When the band of the aerosol generating article 10 is located at the front end of the first opening 321a, the tobacco rod 11 can be configured to correspond to the area with the strongest electric field.

[0186] According to an embodiment, the shape and size of the second opening 321b may correspond to the shape and size of the first opening 321a. For example, if the first opening 321a has a circular shape, the second opening 321b also has a circular shape, and the inner diameter of the first opening 321a and the inner diameter of the second opening 321b may be substantially the same.

[0187] One end of the first plate 323a and one end of the second plate 323b among the plurality of plates 323a and 323b may be arranged along the circumference of the second opening 321b of the connecting portion 322. In addition, the other end 323af of the first plate 323a and the other end 323bf of the second plate 323b among the plurality of plates 323a and 323b are separated from each other and may be open. By connecting the plurality of plates 323a and 323b to the connecting portion 322, a resonator assembly may be formed.

[0188] The resonance part 320 may further include a dielectric accommodation space 327 for accommodating a dielectric. The dielectric accommodation space 327 may be formed in an empty space between the housing 321 and the plurality of plates 323a, 323b. The dielectric accommodation space 327 may accommodate a dielectric 324 having low microwave absorption.

[0189] The dielectric 324 may be in the shape of a hollow cylinder. The plurality of plates 323a, 323b are inserted into the hollow space inside the dielectric 324 so that the dielectric 324 can be installed in the dielectric accommodation space 327. The dielectric 324 may protrude further toward the first opening 321a than the other ends of the plurality of plates 323a, 323b in the length direction in which the housing 321 extends.

[0190] By disposing the dielectric 324 inside the dielectric accommodating space 327 of the resonating section 320, it is possible to generate an electric field at the same level as the electric field generated in the resonating section without the dielectric while reducing the overall size of the resonating section 320. That is, by reducing the size of the resonating section 320 by disposing the dielectric 324 inside the dielectric accommodating space 327, it is possible to reduce the installation space of the resonating section 320 in the aerosol generating device, and as a result, the aerosol generating device can be miniaturized.

[0191] The extractor 325 may be disposed inside the plurality of plates 323a, 323b. The extractor 325 may be in the shape of a hollow cylinder with one end closed and the other end open. The extractor 325 may be detachably disposed between the plurality of plates 323a, 323b, and may perform the function of taking out the aerosol generating article from the storage space 320h. For example, when the user finishes smoking, the user may move the extractor 325 toward the front end of the first opening 321a while holding a portion of the extractor 325, so that the extractor 325 and the aerosol generating article may be taken out from the storage space 320h at the same time.

[0192] The extractor 325 has one end closed and the other end open, and the other end thereof may include a stopper 325s protruding outward from the outer circumference of the extractor 325. In other words, since the diameter of the stopper 325s is larger than the diameter of the first opening 321a, when the extractor 325 is inserted into the accommodation space 320h, the movement of the extractor 325 stops when the rear end of the stopper 325s touches the front end of the first opening 321a.

[0193] The resonating part 320 may include an air introduction channel for introducing external air into the interior. The air introduction channel may be formed in the extractor 325 or between the extractor 325 and the housing 321. When the user puts the aerosol generating article 10 into the mouth and performs an inhalation action, the external air is introduced into the interior of the resonating part 320 through the air introduction channel. The air flows into the interior of the aerosol generating article 10 through the end of the aerosol generating article 10. While flowing through the aerosol generating article 10, the air may be delivered to the user together with the aerosol generated in the aerosol generating article 10.

[0194] Reference Fig. 9, the length from one end to the other end of the extractor 325a, 325b, 325c may correspond to the length of the aerosol generating article 10, 10', 20. The length of the aerosol generating article 10, 10', 20 may be made in a variety of ways according to design requirements. According to one embodiment, by setting the length of the filter rod 12, 12', 22 of the aerosol generating article 10, 10', 20 to a fixed length and setting the length of the tobacco rod 11, 11', 21 of the aerosol generating article 10, 10', 20 differently, the overall length of the aerosol generating article 10, 10', 20 may be made differently.

[0195] For example, the length of the tobacco rod 11 of the aerosol generating article 10 is about 15 mm, and the length of the tobacco rods 11', 21 of the aerosol generating articles 10', 20 can be about 25 mm. In addition, the overall length of the aerosol generating article 20 can be longer than the overall length of the aerosol generating article 10' by the length of the front end plug 23. For example, the length of the front end plug 23 can be about 7 mm. At this time, the length of the filter rods 12, 12', 22 of each of the plurality of aerosol generating articles 10, 10', 20 can be the same.

[0196] For optimal heating of the aerosol generating article 10, 10', 20, the tobacco rod 11, 11', 21 may be preferably arranged near the other end of the plurality of plates 323a, 323b forming the resonance peak. Specifically, the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22 may be preferably arranged between the other end of the plurality of plates 323a, 323b and one end of the dielectric 324.

[0197] When the user selects an extractor 325a, 325b, 325c corresponding to the length of each of the aerosol generating articles 10, 10', 20, inserts the aerosol generating articles 10, 10', 20 into the selected extractor 325a, 325b, 325c, and then inserts the extractor 325a, 325b, 325c into the accommodating space 320h, the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22 can be arranged between the other end of the multiple plates 323a, 323b and one end of the dielectric 324.

[0198] The heater assembly 300 according to the embodiment of the present invention may include a resonance part 320 with both ends open by including a first opening 321a on the housing 321 and a second opening 321b on the connecting part 322 that is fluidly connected to the first opening 321a. Therefore, even if the length of the tobacco rod 11, 11', 21 and / or the length of the front plug 23 are changed based on the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22, the effect of maintaining the same optimal heating position can be expected. In other words, the more the length of the tobacco rod 11, 11', 21 is increased based on the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22, the rear end of the tobacco rod 11, 11', 21 (or, the front plug 23) is arranged closer to the second opening 321b side, and the rear end of the tobacco rod 11, 11', 21 (or, the front plug 23) can also be arranged outside through the second opening 321b according to the situation.

[0199] Fig.10 It is a figure for demonstrating the extractor which includes a hole part.

[0200] Reference Figures 7 to 10 , Fig.10 The extractors 325d, 325e, and 325f shown in FIG. 1 are different from the extractors 325d, 325e, and 325f shown in FIG. 1 only in that they also include a hole portion. Fig. 9 The extractors 325a, 325b, and 325c shown in the figure are different, and the remaining structures are substantially the same. Therefore, repeated description of the same structure will be omitted, and the following description will focus on the differences.

[0201] The extractors 325d, 325e, 325f include cavities into which the aerosol generating articles 10, 10', 20 are inserted, and at least one hole HL1, HL2, HL3 connecting the cavities and the accommodation space 320h may be formed on the outer peripheral surfaces of the extractors 325d, 325e, 325f.

[0202] A plurality of holes HL1, HL2, HL3 of the extractors 325d, 325e, 325f may be formed on the outer periphery of the extractors 325d, 325e, 325f. In this case, the plurality of holes HL1, HL2, HL3 may be arranged at equal intervals from each other. As an example, two holes HL1, HL2, HL3 may be formed side by side, and the two holes may be arranged at equal intervals from each other. In this case, the two holes may be formed oppositely on the outer periphery of the extractors 325d, 325e, 325f and may have the same shape.

[0203] Each of the holes HL1, HL2, HL3 may be formed at a position corresponding to the tobacco rod 11, 11', 21. When the aerosol generating article 10, 10', 20 is inserted into the cavity, a portion of the aerosol generating article 10, 10', 20 exposed through the holes HL1, HL2, HL3 may be confined to the tobacco rod 11, 11', 21. Therefore, the heating efficiency of the tobacco rod 11, 11', 21 may be increased, and the effect of increasing the airflow into the inside of the extractor 325d, 325e, 325f may be expected.

[0204] The extractor 325 may include a resin material having waterproof and / or heat-insulating properties, for example, may include polytetrafluoroethylene (PTFE).

[0205] The extractor 325 can prevent droplets generated by reliquefaction of the aerosol or moisture generated by the aerosol generating article from leaking to the outside of the extractor 325. In addition, the extractor 325 can prevent heat generated at the location of the aerosol generating article from radiating to the outside of the extractor 325. The extractor 325 can perform a liquid leakage prevention function of preventing liquid from leaking to other structures of the resonance part 320 and a heat insulation function of preventing heat dissipation.

[0206] Fig.11A , Fig. 11B and Fig. 11C They are Figure 7 The heater assembly shown in FIG. Fig. 9 A cross-sectional view of the state of the extractor shown in FIG.

[0207] When the aerosol generating article 10, 10', 20 is inserted into the extractor 325a, 325b, 325c of the resonance part 320, the tobacco rod 11, 11', 21 of the aerosol generating article 10, 10', 20 may be located between the plurality of plates 323a, 323b. Since the diameter of the stopper 325s of the extractor 325a, 325b, 325c is larger than the diameter of the first opening 321a, the movement of the aerosol generating article 10, 10', 20 to the left direction is restricted.

[0208] The front ends of the tobacco rods 11, 11', 21 connected to the filter rods 12, 12', 22 are located at a position protruding more than the other ends 323af of the first plate 323a and 323bf of the second plate 323b in the direction toward the first opening 321a of the housing 321.

[0209] The length L1 of the plurality of plates 323a, 323b may be set to be smaller than the length (L1+L2) of the internal space of the housing 321. Therefore, the other ends of the plurality of plates 323a, 323b may be located further inward of the housing 321 than the first opening 321a. That is, the other ends of the plurality of plates 323a, 323b may be spaced apart and disposed at a distance L2 from the rear end of the first opening 321a.

[0210] The length of the first opening 321a protruding from the housing 321 may be L3. The overall length of the housing 321 along the length direction of the housing 321 may be L. The overall length L of the housing 321 may be set in the range of 25 mm to 35 mm. FIG. 11A to FIG. 11C The overall length of the housing 321 is about 29 mm. The length L3 of the first opening 321a may be greater than 5 mm to prevent microwave leakage.

[0211] The height H of the housing 321 in a direction transverse to the length direction of the housing 321 may be set within a range of 13 to 25 mm. FIG. 11A to FIG. 11C The height H of the housing 321 is approximately 16 mm.

[0212] The front end of the dielectric 324 disposed inside the resonator 320 may protrude further in the longitudinal direction of the housing 321 than the other ends of the plurality of plates 323a and 323b. FIG. 11A to FIG. 11C The front end of the dielectric 324 may be in contact with the inner surface of the right side of the housing 321. The length L2 by which the front end of the dielectric 324 protrudes from the other ends of the plurality of plates 323a and 323b may be variously changed. Therefore, although the front end of the dielectric 324 protrudes from the other ends of the plurality of plates 323a and 323b, it may be separated from the inner surface of the right side of the housing 321.

[0213] Among the plurality of plates 323a, 323b, at least a portion of the first plate 323a may be in contact with the coupler 311. The coupler 311 and the first plate 323a may be in contact with each other at a position closer to the connection portion 322 than the first opening 321a.

[0214] When the microwave is transmitted to the first plate 323a through the coupler 311, the resonance of the microwave is formed between the plurality of plates 323a and 323b. In addition, the resonance of the microwave is also formed between the first plate 323a and the upper plate of the housing 321 and between the second plate 323b and the lower plate of the housing 321. Therefore, electric fields can be generated between the plurality of plates 323a and 323b and the connecting portion 322, between the first plate 323a and the upper plate of the housing 321, and between the second plate 323b and the lower plate of the housing 321.

[0215] The connection portion 322 is provided with a second opening 321b corresponding to the first opening 321a at a position opposite to the first opening 321a. The second opening 321b may be formed at the connection portion 322 to be in fluid communication with the first opening 321a.

[0216] Even if the length of the tobacco rod 11, 11', 21 and / or the length of the front plug 23 are changed based on the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22, the effect of maintaining the same optimal heating position can be expected. In other words, the longer the length of the tobacco rod 11, 11', 21 is increased based on the front end of the tobacco rod 11, 11', 21 connected to the filter rod 12, 12', 22, the rear end of the tobacco rod 11, 11', 21 (or the front plug 23) is arranged closer to the second opening 321b side, and the front plug 23 (or the extractor 325c) of the aerosol generating article 20 can also be arranged in the tubular protrusion 321c through the second opening 321b according to the situation.

[0217] Fig.12 It is a schematic representation Fig.11A A perspective view of an electric field distribution of a heater assembly according to an embodiment is shown in FIG. Fig.12 The illustrated electric field distribution shows the intensity of voltage (V / m) per unit length of the resonance portion 320 .

[0218] According to the structure of the resonating part 320 of the heater assembly, a triple resonance mode can be performed in the resonating part 320. A resonance of a transverse electromagnetic mode (TEM mode) of microwaves is formed between the plurality of plates 323a and 323b. In addition, a resonance of a TEM mode different from the resonance formed between the plurality of plates 323a and 323b is formed between the first plate 323a and the upper plate of the housing 321 and between the second plate 323b and the lower plate of the housing 321.

[0219] As triple resonance is generated in the resonating portion 320 of the heater assembly, the aerosol-generating article 10 may be heated more efficiently and uniformly.

[0220] Fig.13 It is a schematic representation Fig.11A A perspective view of the heating density distribution of an aerosol-generating article heated by a heater assembly according to an embodiment is shown in FIG. Fig.13 The heating density distribution shown shows the temperature energy per unit volume (W / m 3 ).

[0221] A resonance peak is formed at the other end of the plurality of plates 323a, 323b, and a stronger electric field can be generated than in other areas. Since the tobacco rod 11 including a dielectric that can generate heat by the electric field of the aerosol generating article is arranged in a manner corresponding to the area with the strongest electric field in the resonance part 320, a portion of the tobacco rod 11 can be heated at the highest temperature.

[0222] Fig.14 is a perspective view schematically showing a heater assembly according to another embodiment.

[0223] Fig.14 The resonating section 320 shown is different from the resonating section 320 shown in FIG. 1 only in that the number of plates is three. Figure 6 The embodiment in which the plurality of plates is two has a difference, and the remaining structure is substantially the same. Therefore, repeated description of the same structure will be omitted, and the following description will focus on the difference.

[0224] The plurality of plates of the resonating portion 320 may include a first plate 323a, a second plate 323b, and a third plate 323c that are spaced apart from each other in a circumferential direction of the aerosol generating article accommodated in the accommodation space 320h.

[0225] The plurality of plates may be arranged in three such that they are spaced apart in the circumferential direction based on the longitudinal central axis X of the aerosol generating article contained in the housing 321. The embodiment is not limited by the number of the plurality of plates, for example, the number of the plurality of plates may be four or more.

[0226] By connecting the first plate 323 a , the second plate 323 b , the third plate 323 c and the connection portion 322 to each other, a resonator assembly may be formed.

[0227] Since the other ends of the first plate 323a, the second plate 323b and the third plate 323c are spaced apart from each other and open to the first opening 321a of the housing 321, open ends may be formed at the other ends of the first plate 323a, the second plate 323b and the third plate 323c.

[0228] The plurality of plates 323a, 323b, 323c extend in the length direction of the housing 321. At least a portion of the plurality of plates may be bent so as to protrude outward from the center in the length direction of the accommodating space 320h accommodating the aerosol generating article. Each of the first plate 323a, the second plate 323b, and the third plate 323c may be bent and extended in the circumferential direction of the aerosol generating article to surround other areas of the aerosol generating article.

[0229] When a structure is used in which a plurality of plates 323a, 323b, 323c are arranged at intervals along the outer circumferential surface of the aerosol generating article and are bent in the circumferential direction, a more uniform electric field can be formed in the resonance portion 320, so that the heater assembly can uniformly heat the aerosol generating article 10.

[0230] Any embodiments of the present disclosure described above or other embodiments are not mutually exclusive or different. The configurations or functions of any embodiments of the present disclosure described above or other embodiments may be used or combined.

[0231] For example, it means that the A structure described in a specific embodiment and / or the drawings can be combined with the B structure described in other embodiments and / or the drawings. In other words, it means that even if the combination between the structures is not directly described, it is considered that the combination can be performed unless it is clearly stated that the combination cannot be performed.

[0232] The above detailed description should not be interpreted as limiting in any aspect, but should be regarded as exemplary. 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. A heater assembly, wherein: include: The oscillator generates microwaves in a specified frequency band. a resonating portion that resonates the microwaves to generate an electric field, and a coupler for transmitting the generated microwaves to the resonant portion; The resonating part comprises: A housing comprising a receiving space for receiving an aerosol generating article and a first opening for inserting the aerosol generating article, a plurality of plates arranged to be spaced apart from each other along a circumferential direction of the aerosol generating article accommodated in the accommodation space, and A connecting portion connects the plurality of plates and the housing and includes a second opening corresponding to the first opening at a position facing the first opening.

2. The heater assembly according to claim 1, wherein: The first opening and the second opening are formed in a fluid communication manner, and the shape and size of the second opening correspond to the shape and size of the first opening.

3. The heater assembly according to claim 1, wherein: include: The takeout device is detachably disposed between the plurality of plates and is used to take out the aerosol generating article from the storage space.

4. The heater assembly according to claim 3, wherein: One end of the extractor is closed and the other end is open, The other end includes a stopper that protrudes outward from the outer peripheral surface of the extractor.

5. The heater assembly of claim 4, wherein: A length of the extractor from the one end to the other end corresponds to a length of the aerosol-generating article.

6. The heater assembly of claim 3, wherein: The extractor includes a cavity into which the aerosol-generating article is inserted, and at least one hole portion for connecting the cavity with the accommodating space is formed on an outer peripheral surface of the extractor.

7. The heater assembly of claim 6, wherein: The aerosol generating article includes a tobacco rod and a filter rod, and the hole portion is formed at a position corresponding to the tobacco rod.

8. The heater assembly of claim 1, wherein: One ends of the plurality of plates are connected to the connection portion, and the other ends of the plurality of plates are spaced apart from each other to be open.

9. The heater assembly of claim 8, wherein: The one ends of the plurality of plates are arranged along a circumference of the second opening, and the other ends of the plurality of plates are arranged to face the first opening of the housing.

10. The heater assembly of claim 8, wherein: A plurality of the plates extend in the length direction of the aerosol generating article, At least a portion of the plurality of plates is curved so as to protrude outward from a center in a longitudinal direction of the aerosol-generating article.

11. The heater assembly of claim 8, wherein: The housing and the plurality of plates are spaced apart from each other, The heater assembly also includes a dielectric disposed between the housing and the plurality of plates.

12. The heater assembly of claim 11, wherein: One end of the dielectric protrudes from the other ends of the plurality of plates toward the first opening.

13. The heater assembly of claim 12, wherein: The aerosol generating article includes a tobacco rod and a filter rod, and a front end of the tobacco rod in contact with the filter rod is arranged between the other end of the plate and one end of the dielectric.

14. The heater assembly of claim 1, wherein: The coupler penetrates the housing and contacts any one of the plurality of plates.

15. An aerosol generating device, wherein: include: a housing including an insertion hole for inserting an aerosol generating article, and a heater assembly for heating the aerosol generating article inserted through the insertion hole; The heater assembly comprises: The oscillator generates microwaves in a specified frequency band. a resonating portion that resonates the microwaves to generate an electric field, and a coupler for transmitting the generated microwaves to the resonant portion; The resonating part comprises: a housing, comprising a receiving space for receiving the aerosol generating article and a first opening for inserting the aerosol generating article, a plurality of plates arranged to be spaced apart from each other along a circumferential direction of the aerosol generating article accommodated in the accommodation space, and A connecting portion connects the plurality of plates and the housing and includes a second opening corresponding to the first opening at a position facing the first opening.

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