Aerosol-generating device and operation method thereof

Abstract

This aerosol-generating device comprises: a power generation unit for generating a frequency signal within a preset frequency range; and a heating unit having a space for accommodating at least a portion of an aerosol-generating article, and heating the aerosol-generating article on the basis of the frequency signal generated by the power generation unit, wherein the heating unit may comprise a heating structure in which the structure of the heating unit is changed according to an adjustment of setting a frequency signal corresponding to a specific frequency range within the preset frequency range.

Description

Aerosol generating device and method of operation thereof

[0001] This relates to an aerosol generating device and its method of operation.

[0002] Cigarettes are smoking products that have been consumed worldwide for centuries, and their main component is tobacco leaves. Smokers inhale the smoke produced by burning cigarettes. However, the traditional combustion process of cigarettes generates large amounts of harmful substances, and these substances can be detrimental to the health of not only smokers but also secondhand smokers.

[0003] To address these issues, various aerosol generation devices are being developed. Specifically, aerosol generation devices that generate aerosols by heating aerosol-generating materials using resistance heating or induction heating methods are being developed. Recently, dielectric heating aerosol generation devices that heat aerosol-generating materials using electromagnetic waves are also being developed.

[0004] By adjusting the structure of the heating section, the resonance frequency and impedance matching of the heating section are to be changed.

[0005] By adjusting the structure of the heating unit, the range of heating temperatures for heating aerosol-generating articles is to be changed.

[0006] We aim to increase satisfaction with aerosol-generating products by heating them to a user-desired temperature through simple user operation.

[0007] The aim is to achieve impedance matching by adjusting the structure of the heating unit to resolve impedance mismatches caused by the external environment operating the aerosol generating device or errors in the manufacturing process of the aerosol generating device.

[0008] By achieving impedance matching through simple user operation, we aim to increase power transfer efficiency and enhance the performance of the heating structure that acts as an antenna.

[0009] The aim is to provide an environment where different types of aerosol generating articles can be heated in a single aerosol generating device.

[0010] We intend to use two or more frequencies in an aerosol generating device using a single power amplifier.

[0011] By varying the resonant frequency used depending on the type of aerosol generating material inserted into the aerosol generating device, we aim to increase power transfer efficiency and enhance the performance of the heating structure that acts as an antenna.

[0012] According to one aspect, an aerosol generating device is provided, comprising: a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating unit based on the frequency signal generated by the power generating unit, wherein the heating unit includes a heating structure in which the structure of the heating unit is changed according to an adjustment that sets a frequency signal corresponding to a specific frequency range within the preset frequency range.

[0013] According to one embodiment, the heating unit may include a signal transmission unit that transmits a frequency signal corresponding to the specific frequency range to the heating structure based on the structure of the heating unit modified according to the adjustment.

[0014] According to one embodiment, the signal transmission unit includes a plurality of feed pads, and the plurality of feed pads can transmit a frequency signal of a frequency range assigned to each feed pad within the preset frequency range to the heating structure.

[0015] According to one embodiment, the adjustment may be a physical adjustment for selecting a feed pad of the signal transmission unit to transmit a frequency signal of the specific frequency range to the signal receiving unit of the heating structure.

[0016] According to one embodiment, the physical adjustment may represent an operation of moving the heating structure so that the signal receiving part of the heating structure is coupled with at least one feed pad among a plurality of feed pads of the signal transmitting part.

[0017] According to one embodiment, the operation may include: an operation of rotating the heating structure so that the signal receiving portion of the heating structure is positioned at a position corresponding to the at least one feed pad; and an operation of moving the heating structure so that the signal receiving portion of the heating structure is coupled with the at least one feed pad at the position where the signal receiving portion corresponds to the at least one feed pad.

[0018] According to one embodiment, the aerosol generating device may further include an adjustment unit for releasing the coupling between the signal receiving unit of the heating structure and the at least one feed pad.

[0019] According to one embodiment, the heating structure can heat the aerosol generating article based on a frequency signal corresponding to a feed pad coupled to the heating structure among a plurality of feed pads of the signal transmission unit.

[0020] According to one embodiment, the heating structure can control the temperature range for heating the aerosol generating article differently depending on the combined feed pad.

[0021] According to one embodiment, the aerosol generating device may further include a control unit that controls the power generating unit to generate the frequency signal within the preset frequency range; and a power supply unit that supplies power to the power generating unit and the control unit.

[0022] According to another aspect, a method of operating an aerosol generating device is provided, comprising the steps of: performing adjustments to change the structure of a heating unit that accommodates at least a portion of an aerosol generating article and heats the aerosol generating article in order to set a frequency signal corresponding to a specific frequency range within a preset frequency range; generating the frequency signal based on power supplied from a power supply unit; transmitting the frequency signal to a heating structure of the heating unit through a signal transmission unit of the heating unit; and heating the aerosol generating article through the heating structure based on the frequency signal.

[0023] According to one embodiment, the step of performing an adjustment to change the structure of the heating unit may include the step of performing a physical adjustment to select a feed pad of the signal transmission unit for transmitting a frequency signal of the specific frequency range to the signal receiving unit of the heating structure.

[0024] According to one embodiment, the physical adjustment may represent an operation of moving the heating structure so that the signal receiving part of the heating structure is coupled with at least one feed pad among a plurality of feed pads of the signal transmitting part.

[0025] According to one aspect, an aerosol generating device is provided, comprising: a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating unit based on the frequency signal generated by the power generating unit, wherein the heating unit includes a heating structure in which the structure of the heating unit is changed according to an adjustment for changing the resonant frequency.

[0026] According to one embodiment, the heating unit may include a signal transmission unit that transmits a frequency signal corresponding to a changed resonant frequency to the heating structure based on the structure of the heating unit changed according to the adjustment.

[0027] According to one embodiment, the signal transmission unit includes a feed pad including an inductor, and by variably adjusting the value of the inductance within the feed pad according to the adjustment, a frequency signal corresponding to the changed resonant frequency can be transmitted to the signal receiving unit of the heating structure.

[0028] According to one embodiment, the modified resonant frequency may be a frequency that matches the output impedance of the signal transmission unit with the input impedance of the heating structure.

[0029] According to one embodiment, the adjustment may involve moving the heating structure so that the signal receiving portion of the heating structure is coupled to a matching position for changing the resonant frequency within the feed pad.

[0030] According to one embodiment, the heating structure can heat the aerosol generating article based on a frequency signal corresponding to the changed resonant frequency, which is determined according to the position where the heating structure and the feed pad of the signal transmission unit are combined.

[0031] According to one embodiment, the aerosol generating device may further include an adjustment unit for adjusting the coupling or disengagement between the signal receiving unit of the heating structure and the feed pad of the signal transmitting unit.

[0032] According to one embodiment, if the heating temperature for heating the aerosol generating article does not reach the target temperature, the adjustment may be a first adjustment that increases the value of the inductance of the feed pad of the signal transmission unit.

[0033] According to one embodiment, if the heating temperature for heating the aerosol generating article exceeds the target temperature, the adjustment may be a second adjustment that reduces the value of the inductance of the feed pad of the signal transmission unit.

[0034] According to one embodiment, the aerosol generating device may further include a control unit that controls the power generating unit to generate the frequency signal within the preset frequency range; and a power supply unit that supplies power to the power generating unit and the control unit.

[0035] According to another aspect, the method may include the steps of: performing an adjustment to change the structure of a heating unit that accommodates at least a portion of an aerosol-generating article and heats the aerosol-generating article in order to change the resonant frequency within a preset frequency range; generating a frequency signal corresponding to the changed resonant frequency based on power supplied from a power supply unit and the structure of the heating unit changed according to the adjustment; transmitting the frequency signal to a heating structure of the heating unit through a signal transmission unit of the heating unit; and heating the aerosol-generating article through the heating structure based on the frequency signal.

[0036] According to one embodiment, the step of performing an adjustment to change the structure of the heating unit may include the step of variably adjusting the value of the inductance of the feed pad of the signal transmission unit.

[0037] According to one embodiment, the step of variably adjusting the value of the inductance may include the step of performing an adjustment to move the heating structure so that the signal receiving part of the heating structure is coupled to a matching position for changing the resonant frequency within the feed pad.

[0038] According to one embodiment, the step of performing an adjustment to change the structure of the heating unit may include the step of performing a first adjustment to increase the value of the inductance of the feed pad of the signal transmission unit if the heating temperature for heating the aerosol generating article does not reach a target temperature.

[0039] According to one embodiment, the step of performing an adjustment to change the structure of the heating unit may include a step of performing a second adjustment to reduce the value of the inductance of the feed pad of the signal transmission unit when the heating temperature of the aerosol generating article exceeds a target temperature.

[0040] According to one aspect, an aerosol generating device is provided, comprising: a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating unit based on a frequency generated by the power generating unit, wherein the heating unit includes a heating structure in which the size of the space changes in response to a frequency selected from among preset frequencies.

[0041] According to one embodiment, the aerosol generating device may further include a control unit that receives an input for selecting a first frequency corresponding to a first aerosol generating article inserted into the heating unit among the preset frequencies.

[0042] According to one embodiment, the heating structure can be designed so that the cross-sectional area of ​​the space is reduced as a frequency higher than the reference frequency is selected among the preset frequencies.

[0043] According to one embodiment, the heating structure may be designed so that the cross-sectional area of ​​the space increases as a frequency lower than the reference frequency is selected among the preset frequencies.

[0044] According to one embodiment, the power generation unit may include a frequency selection unit that selects a first frequency corresponding to a first aerosol generating article inserted into the aerosol generating device among the preset frequencies.

[0045] According to one embodiment, the frequency selection unit may include a switching circuit or a filter circuit that selects a frequency among the preset frequencies corresponding to the size of the aerosol generating article inserted into the aerosol generating device.

[0046] According to one embodiment, the heating structure may include at least one opening formed on its surface.

[0047] According to one embodiment, the at least one opening may be formed in the shape of a slit or a slot.

[0048] According to one embodiment, the at least one opening may be an open hole formed with one end open or a closed hole formed without being open to the outside.

[0049] According to one embodiment, the size of the space of the heating structure can be expanded or reduced in correspondence with the size of the aerosol generating article.

[0050] According to one embodiment, the heating structure may have a space formed by connecting a plurality of plates with a length formed in the longitudinal direction of the aerosol generating article.

[0051] According to one embodiment, the heating structure may be designed so that a portion of the plurality of plates overlaps.

[0052] According to one embodiment, the aerosol generating device may further include a control unit that controls the power generating unit to generate the frequency signal within the preset frequency range; and a power supply unit that supplies power to the power generating unit and the control unit.

[0053] According to another aspect, a method of operating an aerosol generating device is provided, comprising the steps of: providing a space for accommodating at least a portion of an aerosol generating article based on a frequency selected within a preset frequency range, and changing the size of said space of a heating unit that heats said aerosol generating article; generating a frequency signal corresponding to said selected frequency based on power supplied from a power supply unit; transmitting said frequency signal to a heating structure of said heating unit; and heating said aerosol generating article based on said frequency signal through said heating structure.

[0054] According to one embodiment, the step of changing the size of the space may include: a step of changing the size of the space such that the cross-sectional area of ​​the space becomes smaller when a frequency higher than the reference frequency is selected among the preset frequencies; and a step of changing the size of the space such that the cross-sectional area of ​​the space becomes larger when a frequency lower than the reference frequency is selected among the preset frequencies.

[0055] According to one embodiment, the step of transmitting the frequency signal to the heating structure of the heating unit may include: the step of obtaining a frequency signal corresponding to the selected frequency through a frequency selection unit; and the step of transmitting the frequency signal corresponding to the selected frequency to the heating structure.

[0056] By adjusting the structure of the heating section, the resonance frequency of the heating section can be changed and impedance matching can be performed.

[0057] By adjusting the structure of the heating unit, the range of heating temperatures for heating the aerosol-generating article can be changed, and depending on the range of heating temperatures, at least one of the taste, aroma, vapor volume, and smoking sensation of the aerosol-generating article can be provided in various forms.

[0058] By heating the aerosol-generating product to a desired temperature through simple user operation, satisfaction with the aerosol-generating product can be increased.

[0059] Impedance mismatch caused by the external environment operating the aerosol generating device or errors in the manufacturing process of the aerosol generating device can be corrected by adjusting the structure of the heating unit, thereby performing impedance matching.

[0060] By achieving impedance matching through simple user operation, power transfer efficiency can be increased, and the performance of the heating structure acting as an antenna can be enhanced.

[0061] A single aerosol generating device can provide an environment capable of heating different types of aerosol generating articles.

[0062] Two or more frequencies can be used in an aerosol generating device using a single power amplifier.

[0063] By varying the resonant frequency used depending on the type of aerosol generating material inserted into the aerosol generating device, power transfer efficiency can be increased and the performance of the heating structure acting as an antenna can be enhanced.

[0064] The present disclosure can be easily understood from the combination of the following detailed description and the accompanying drawings, where reference numerals denote structural elements.

[0065] FIGS. 1a to 1c show an external view and an internal cross-sectional view of an aerosol generating device according to one embodiment.

[0066] FIGS. 2a and 2b are block diagrams illustrating the configuration of an aerosol generating device according to one embodiment.

[0067] FIGS. 3a and 3b are drawings illustrating the configuration of a heating structure according to one embodiment.

[0068] FIGS. 4a to 4c are drawings for explaining the configuration of a signal transmission unit and a heating unit when the aerosol generating device is an aerosol generating device according to the embodiment of FIG. 1a.

[0069] FIGS. 5a to 5c are drawings for explaining the configuration of a signal transmission unit and a heating unit when the aerosol generating device is an aerosol generating device according to the embodiment of FIG. 1b.

[0070] FIGS. 6a to 6g are drawings for explaining the structure of a heating structure when the aerosol generating device is an aerosol generating device according to the embodiment of FIG. 1c.

[0071] FIG. 7a is a graph for explaining the reflection characteristics according to frequency at the position of the feed pad, in the case where, according to one embodiment, the aerosol generating device is the aerosol generating device according to the embodiment of FIG. 1a.

[0072] FIG. 7b is a graph for explaining the reflection characteristics according to frequency at the position of the feed pad, in the case where, according to one embodiment, the aerosol generating device is the aerosol generating device according to the embodiment of FIG. 1b.

[0073] FIG. 7c is a graph for explaining frequency characteristics according to the frequency applied to the heating part of an aerosol generating device when, according to one embodiment, the aerosol generating device is an aerosol generating device according to the embodiment of FIG. 1c.

[0074] FIG. 8 is a flowchart illustrating the operation method of an aerosol generating device according to one embodiment.

[0075] FIG. 9 is a flowchart illustrating the operation method of an aerosol generating device according to another embodiment.

[0076] FIG. 10 is a flowchart illustrating the operation method of an aerosol generating device according to another embodiment.

[0077] An aerosol generating device comprises: a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating article based on the frequency signal generated by the power generating unit, wherein the heating unit is provided with a space for accommodating at least a portion of the aerosol generating article, and the heating unit may include a heating structure in which the structure of the heating unit is changed according to an adjustment that sets a frequency signal corresponding to a specific frequency range within the preset frequency range.

[0078] Additionally, the aerosol generating device includes a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating article based on the frequency signal generated by the power generating unit, wherein the heating unit is provided with a space for accommodating at least a portion of the aerosol generating article, and the heating unit may include a heating structure in which the structure of the heating unit is changed according to an adjustment for changing the resonance frequency.

[0079] An aerosol generating device comprises: a power generating unit that generates a frequency signal within a preset frequency range; and a heating unit that heats the aerosol generating article based on a frequency generated by the power generating unit, wherein the heating unit may include a heating structure in which the size of the space changes in response to a frequency selected from among preset frequencies.

[0080] Various embodiments are described in detail below with reference to the drawings. The embodiments described below may be implemented in various different forms. In order to explain the features of the embodiments more clearly, detailed descriptions of matters widely known to those skilled in the art to which the following embodiments belong are omitted.

[0081] Meanwhile, when a configuration is described in this specification as being "connected" to another configuration, this includes not only cases where they are "directly connected," but also cases where they are "connected with another configuration in between." Furthermore, when a configuration is described as "including" another configuration, this means that, unless specifically stated otherwise, it does not exclude other configurations but may include additional configurations.

[0082] Additionally, terms including ordinal numbers, such as 'first' or 'second' as used herein, may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another.

[0083] In this specification, an aerosol generating device may refer to a device that generates nicotine vapor in the form of an inhalable aerosol by heating a tobacco or a nicotine-containing substance within an aerosol generating article. In this specification, an aerosol generating article refers to an article used for smoking.

[0084] FIG. 1a shows an external view and an internal cross-sectional view of an aerosol generating device (100) according to one embodiment.

[0085] The image (110) of FIG. 1a shows an external view of an aerosol generating device (100). The aerosol generating device (100) can accommodate an aerosol generating article (10). Specifically, an insertion opening for inserting an aerosol generating article (10) may be provided at one end of the aerosol generating device (100), and a physical structure may be provided so that the aerosol generating article (10) can be inserted for a predetermined length.

[0086] Referring to the image (120) of FIG. 1a, the aerosol generating device (100) may include a heating unit (220) for heating an inserted aerosol generating article (10). The heating unit (220) may heat the aerosol generating article (10) based on a frequency signal generated by a power generating unit (not shown).

[0087] Specifically, the heating unit (220) may include a heating structure (310) that accommodates an aerosol generating article (10) and heats the aerosol generating article (10) based on a frequency signal. Additionally, the heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal to the heating structure (310).

[0088] The heating structure (310) can heat the aerosol generating article (10) using a dielectric heating method. For example, the heating structure (310) can heat the dielectric within the aerosol generating article (10) using microwave resonance. As the aerosol generating article (10) is heated, an aerosol can be generated from the aerosol generating article (10). The heating structure (310) can heat the aerosol generating article (10) based on the physical structure of the heating structure (310) and microwaves applied to the heating structure.

[0089] The signal transmission unit (320) may include a plurality of feed pads. By connecting at least one of the plurality of feed pads to the heating structure (310), a frequency signal corresponding to a specific frequency range can be transmitted to the heating structure (310). For example, the heating structure (310) may be connected to an adjustment unit (330) for adjusting the coupling between the signal transmission unit (320) and the heating structure (310). By adjusting the adjustment unit (330), the heating structure (310) may be coupled to some of the feed pads among the plurality of feed pads.

[0090] FIG. 1b shows an external view and an internal cross-sectional view of an aerosol generating device (100) according to one embodiment.

[0091] Referring to images (110) and (130) of FIG. 1b, the aerosol generating device (100) may include a heating unit (220) for heating an inserted aerosol generating article (10). The heating unit (220) may heat the aerosol generating article (10) based on a frequency signal generated by a power generating unit (not shown).

[0092] Specifically, the heating unit (220) may include a heating structure (310) that accommodates an aerosol generating article (10) and heats the aerosol generating article (10) based on a frequency signal. Additionally, the heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal to the heating structure (310).

[0093] The signal transmission unit (320) may include a feed pad containing an inductance. By variably adjusting the value of the inductance of the feed pad, the resonant frequency may be changed. The signal transmission unit (320) may transmit a frequency signal corresponding to the changed resonant frequency to the heating structure (310).

[0094] For example, the heating structure (310) may be connected to an adjustment unit for adjusting the coupling or uncoupling between the signal transmission unit (320) and the heating structure (310). For example, variable adjustment of the inductance value may be performed by adjusting the position where the signal receiving unit (315) of the heating structure (310) is connected to the feed pad through the adjustment unit.

[0095] FIG. 1c shows an external view and an internal cross-sectional view of an aerosol generating device (100) according to one embodiment.

[0096] Referring to images (110) and (140) of FIG. 1c, the aerosol generating device (100) may include a heating unit (220) for heating the inserted aerosol generating device (100). The heating unit (220) may heat the aerosol generating article (10) based on a frequency signal generated by a power generating unit (not shown).

[0097] Specifically, the heating unit (220) may include a heating structure (310-1, 310-2) that receives an aerosol generating article (10-1, 10-2) and heats the aerosol generating article (10-1, 10-2) based on a frequency signal. Additionally, the heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal to the heating structure (310-1, 310-2).

[0098] The heating structure (310-1, 310-2) can heat the aerosol generating article (10-1, 10-2) using a dielectric heating method. For example, the heating structure (310-1, 310-2) can heat the dielectric within the aerosol generating article (10-1, 10-2) using microwave resonance. As the aerosol generating article (10-1, 10-2) is heated, an aerosol can be generated from the aerosol generating article (10-1, 10-2). The heating structure (310-1, 310-2) can heat the aerosol generating article (10-1, 10-2) based on the physical structure of the heating structure (310-1, 310-2) and microwaves applied to the heating structure (310-1, 310-2).

[0099] The signal transmission unit (320) is connected to the heating structure (310-1, 310-2), so that a frequency signal corresponding to a specific frequency range can be transmitted to the heating structure (310-1, 310-2).

[0100] Additionally, the heating structure (310-1, 310-2) may be connected to an adjustment part (330) which is provided with an inlet for receiving an aerosol generating article (10-1, 10-2) and has a hole size that is adjusted to correspond to the thickness of the aerosol generating article (10-1, 10-2).

[0101] For example, when describing the case where a first aerosol generating article (10-1) is heated in an aerosol generating device (100) and the case where a second aerosol generating article (10-2), which is thinner than the first aerosol generating article (10-1), is heated, the size of the space into which the aerosol generating article (10) is inserted can be adjusted because the sizes of the first aerosol generating article (10-1) and the second aerosol generating article (10-2) are different. Here, the size may be the thickness, cross-sectional area, etc. of the aerosol generating article (10).

[0102] Depending on the size of the space into which the aerosol generating article (10) is inserted, the resonant frequency of the aerosol generating device (100) may vary. For example, as the size of the space becomes smaller, the resonant frequency may be increased to increase the concentration of the electromagnetic field of the heating part. Referring to the image (120) of FIG. 1, when a second aerosol generating article (10-2) that is smaller in size than the first aerosol generating article (10-1) is inserted, the aerosol generating device may reduce the size of the space and increase the frequency applied to the heating part (220).

[0103] Specifically, when the first aerosol generating article (10-1) is inserted into the heating section (220), a space corresponding to the thickness of the first aerosol generating article (10-1) may be formed in the heating structure (310-1). Additionally, the size of the hole in the adjustment section (330) into which the first aerosol generating article (10-1) is inserted may also be adjusted to a size corresponding to the thickness of the first aerosol generating article (10-1). In this case, the size of the hole into which the first aerosol generating article (10-1) is inserted may be adjusted while the exterior of the adjustment section (330) remains fixed.

[0104] When a second aerosol generating article (10-2) that is thinner than the first aerosol generating article (10-1) is inserted, the heating structure (310-2) can be reduced by a space corresponding to the thickness of the second aerosol generating article (10-2). In this case, the size of the hole in the adjustment part (330) becomes smaller than the size of the hole when the first aerosol generating article (10-1) is inserted. Meanwhile, since the size of the heating structure (310-2) is adjusted, by referring to the areas (121, 122) within the image (140), the position of the signal transmission part (320) to which the signal receiving part (413-1, 413-2) within the heating structure (310-2) is connected can also be adjusted. In this case, the position to which the signal receiving part (413-1, 413-2) is connected can be adjusted while the exterior of the signal transmission part (320) remains fixed.

[0105] Detailed information regarding the aerosol generating device (100) described in FIGS. 1a to 1c is explained in FIGS. 2a to 10.

[0106] FIGS. 2a and 2b are block diagrams illustrating the configuration of an aerosol generating device according to one embodiment.

[0107] Referring to FIG. 2a, the aerosol generating device (100) may include a power generating unit (210), a heating unit (220), a power supply unit (230), and a control unit (240). However, not all of the illustrated components are essential components. The aerosol generating device (100) may be implemented with more components than those illustrated, and may also be implemented with fewer components. The above components will be examined below.

[0108] The power generation unit (210) can generate a frequency signal within a preset frequency range. For example, the preset frequency range may include a frequency band to which microwaves belong. The frequency band to which microwaves belong may be from 300 MHz to 300 GHz. Additionally, the preset frequency range may be a specific range within the frequency band to which microwaves belong. The specific range may be from 5 GHz to 20 GHz.

[0109] For example, the power generation unit (210) may include a signal generator, a first matching circuit, a signal power amplifier, and a second matching circuit. The signal generator may generate a frequency signal within a preset frequency range. The first matching circuit may control the output of the frequency signal so that optimal power is delivered to the signal power amplifier. The signal power amplifier may adjust the magnitude of the output frequency signal by increasing or decreasing the amplitude of the frequency signal. The second matching circuit may check whether the impedance viewed from the signal generator toward the heating unit (220) matches the impedance viewed from the heating unit (220) toward the signal generator, and may control the output of the frequency signal so that a preset power delivery condition is satisfied.

[0110] For another example, referring to FIG. 2b, the power generation unit (210) may include a frequency generation unit (212), a power amplifier (214), and a frequency selection unit (216). The frequency generation unit (212) may generate a frequency signal within a preset frequency range. The frequency generation unit (212) may include a first matching circuit that controls the output of the frequency signal so that optimal power is delivered to the power amplifier (214). The power amplifier (214) may adjust the magnitude of the output frequency signal by increasing or decreasing the amplitude of the frequency signal. The frequency selection unit (216) may select a frequency corresponding to an aerosol generating article inserted into the aerosol generating device (100). The frequency selection unit (216) may output a frequency signal corresponding to the selected frequency. Additionally, the frequency selection unit (216) may include a second matching circuit that checks whether the impedance viewed from the frequency generation unit (212) toward the heating unit (220) matches the impedance viewed from the heating unit (220) toward the frequency generation unit (212), and controls the output of the frequency signal so that a preset power transfer condition is satisfied. The configuration of the power generation unit (210) is described in more detail in FIG. 2b.

[0111] The heating unit (220) can heat an aerosol generating article inserted into a heating structure based on microwaves generated by the power generation unit (210). For example, the heating unit (220) can form microwave resonance to heat the aerosol generating article (10) in the heating structure. The aerosol generating article (10) may be heated before microwave resonance is formed. When microwave resonance is formed, it may be a case where the aerosol generating article (10) is ideally heated. In the microwave resonance state, the aerosol generating article (10) may be heated uniformly.

[0112] Meanwhile, the heating structure may include a fixing part that fixes an aerosol generating article (10) to be accommodated for a predetermined length in a predetermined space provided inside the heating structure.

[0113] Additionally, the heating unit (220) can heat the aerosol generating article (10) based on the frequency signal generated by the power generating unit (210).

[0114] Meanwhile, when the aerosol generating device (100) is the aerosol generating device (100) according to the embodiment of FIG. 1a, the structure within the heating unit (220) may be changed according to an adjustment that sets a frequency signal corresponding to a specific frequency range within a preset frequency range. For example, the structure within the heating unit (220) may be a structure connected between a heating structure (310) and a signal transmission unit. Additionally, the heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal corresponding to a specific frequency range to the heating structure (310) based on the structure of the heating unit (220) changed according to the adjustment.

[0115] For example, the signal transmission unit (320) may include a plurality of feed pads. The plurality of feed pads can transmit a frequency signal of a frequency range assigned to each feed pad within a preset frequency range to the heating structure (310).

[0116] Additionally, the adjustment for changing the structure of the heating unit (220) may be a physical adjustment for selecting a feed pad of the signal transmission unit (320). Here, the physical adjustment may represent an operation of moving the heating structure (310) so that the signal receiving unit (413) of the heating structure (310) is coupled with at least one feed pad among the plurality of feed pads of the signal transmission unit (320).

[0117] For example, the operation of moving the heating structure (310) may include the operation of rotating the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is positioned at a location corresponding to at least one feed pad, and the operation of moving the heating structure (310) so that the signal part of the heating structure (310) is coupled with at least one feed pad at the location where the signal receiving part (413) of the heating structure (310) is positioned at least one feed pad.

[0118] The aerosol generating device (100) may further include an adjustment unit (330) for changing the coupling structure between the heating structure (310) and the signal transmission unit (320). The adjustment unit (330) may be located near an insertion opening in the heating structure (310) into which an aerosol generating article (10) is inserted. The adjustment unit (330) may be a part of the heating structure (310) or may be coupled to the heating structure (310) as a separate component. The adjustment unit (330) may receive an adjustment for changing the structure connecting the heating structure (310) and the signal transmission unit (320). For example, the adjustment may be at least one of an adjustment for rotating the heating structure (310) in a preset direction and an adjustment for connecting or disconnecting the heating structure (310) and the signal transmission unit (320).

[0119] Adjustments to change the structure of the heating unit (220) can be performed through the adjustment unit (330). By adjusting through the adjustment unit (330), the signal receiving unit (413) of the heating structure (310) and at least one feed pad selected from a plurality of feed pads may be connected or disconnected. Here, the connection between the signal receiving unit (413) of the heating structure (310) and at least one feed pad may mean an electrical connection or a physical connection.

[0120] For example, when pressure is applied to the adjustment unit (330) in the direction in which the aerosol generating article (10) is inserted, the heating structure (310) is disconnected from the signal transmission unit (320), and the heating structure (310) can be moved in the opposite direction to the direction in which the aerosol generating article (10) is inserted. The aerosol generating article (10) can be inserted into the heating structure (310), and the adjustment unit (330) can receive an adjustment that changes the structure of the heating unit (220). For example, the adjustment unit (330) can receive an adjustment that rotates the heating structure (310) in a preset direction and an adjustment that moves the heating structure (310) in the direction in which the aerosol generating article (10) is inserted. Through the received adjustment, the signal receiving unit (413) of the heating structure (310) can be coupled with at least one feed pad among the plurality of feed pads of the signal transmission unit (320).

[0121] The heating structure (310) can heat an aerosol generating article (10) based on a frequency signal corresponding to a feed pad coupled to the heating structure (310) among a plurality of feed pads of the signal transmission unit (320). The heating structure (310) can control the temperature range for heating the aerosol generating article (10) differently depending on the coupled feed pad.

[0122] The power supply unit (230) can supply power to the power generation unit (210) and the control unit (240). The control unit (240) can control the power generation unit (210) so that a frequency signal within a preset frequency range is generated. By controlling the power generation unit (210), the control unit (240) can control the power generation unit (210) so that a frequency having a preset range is output.

[0123] Meanwhile, when the aerosol generating device (100) is an aerosol generating device (100) according to the embodiment of FIG. 1b, the structure within the heating unit (220) may be changed according to an adjustment that changes the frequency signal within a preset frequency range. For example, the structure within the heating unit (220) may be a structure connected between a heating structure (310) and a signal transmission unit (320). Additionally, the heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal corresponding to the changed resonant frequency to the heating structure (310) based on the structure of the heating unit (220) changed according to the adjustment.

[0124] For example, the signal transmission unit (320) may include a feed pad containing an inductance. The value of the inductance of the feed pad may be variably adjusted, and the signal transmission unit (320) may transmit a frequency signal corresponding to a changed resonant frequency to the heating structure (310) based on the adjusted value of the inductance.

[0125] Here, the changed resonant frequency may be a frequency that matches the output impedance of the signal transmission unit (320) with the input impedance of the heating structure (310). Additionally, the adjustment for changing the resonant frequency may involve moving the heating structure (310) so that the signal receiving unit (315) of the heating structure (310) is coupled to a matching position for changing the resonant frequency within the feed pad.

[0126] For example, the operation of moving the heating structure (310) may include the operation of rotating the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is positioned at a pre-coupling release position corresponding to a matching position within the feed pad, and the operation of moving the heating structure (310) along the longitudinal direction of the heating structure (310) so that the signal receiving part (315) of the heating structure (310) is at the release position and the signal part of the heating structure (310) is coupled with a coupling position within the feed pad.

[0127] The aerosol generating device (100) may further include an adjustment unit (330) for changing the coupling structure between the heating structure (310) and the signal transmission unit (320). The adjustment unit (330) may be located near an insertion opening in the heating structure (310) into which an aerosol generating article (10) is inserted. The adjustment unit (330) may be a part of the heating structure (310) or may be coupled to the heating structure (310) as a separate component. The adjustment unit (330) may receive an adjustment for changing the structure connecting the heating structure (310) and the signal transmission unit (320). For example, the adjustment may be at least one of an adjustment for rotating the heating structure (310) in a preset direction and an adjustment for connecting or disconnecting the heating structure (310) and the signal transmission unit (320).

[0128] Adjustments to change the structure of the heating unit (220) can be performed through the adjustment unit (330). By adjusting through the adjustment unit (330), the signal receiving unit (413) of the heating structure (310) can be coupled or uncoupled at a specific location within the feed pad. Here, the coupling between the signal receiving unit (413) of the heating structure (310) and the feed pad may refer to an electrical coupling or a physical coupling.

[0129] For example, when pressure is applied to the adjustment unit (330) in the direction in which the aerosol generating item (10) is inserted, the heating structure (310) is disconnected from the signal transmission unit (320), and the heating structure (310) can be moved in the opposite direction to the direction in which the aerosol generating item (10) is inserted. The aerosol generating item (10) can be inserted into the heating structure (310), and the adjustment unit (330) can receive an adjustment that changes the structure of the heating unit (220). For example, the adjustment unit (330) can receive an adjustment that rotates the heating structure (310) in a preset direction and an adjustment that moves the heating structure (310) in the direction in which the aerosol generating item (10) is inserted. Through input adjustment, the signal receiving part (413) of the heating structure (310) can be combined with a matching position for changing the resonant frequency within the feed pad of the signal transmitting part (320).

[0130] If the heating temperature for heating the aerosol generating article does not reach the target temperature, the resonance frequency can be changed through a first adjustment that increases the value of the inductance of the feed pad of the signal transmission unit (320). Here, whether the heating temperature reaches the target temperature can be determined by whether the heating temperature reaches the target temperature within a preset time from the time when the operation to heat the aerosol generating article is started in the aerosol generating device (100).

[0131] Additionally, if the heating temperature for heating the aerosol generating article exceeds the target temperature, the resonance frequency can be changed through a second adjustment that reduces the value of the inductance of the feed pad of the signal transmission unit (320). Here, whether the heating temperature exceeds the target temperature can be determined by whether the heating temperature reaches the target temperature and rises to a temperature higher than the preset temperature range from the target temperature after a preset time from the time when the operation to heat the aerosol generating article in the aerosol generating device (100) is started.

[0132] The heating unit (220) can heat an aerosol generating article (10) based on a frequency signal corresponding to the position where the heating structure (310) is coupled with the feed pad of the signal transmission unit (320). Additionally, the heating structure (310) can control the temperature range for heating the aerosol generating article (10) differently depending on the position of the coupled feed pad.

[0133] The power supply unit (230) can supply power to the power generation unit (210) and the control unit (240). The control unit (240) can control the power generation unit (210) so that a frequency signal within a preset frequency range is generated. By controlling the power generation unit (210), the control unit (240) can control the power generation unit (210) so that a frequency having a preset range is output.

[0134] Meanwhile, if the aerosol generating device (100) is the aerosol generating device (100) according to the embodiment of FIG. 1C, the structure within the heating unit (220) may be changed based on a frequency selected within a preset frequency range. For example, the heating structure (310) within the heating unit (220) may be changed to the size of a space that accommodates an aerosol generating article corresponding to the selected frequency. The heating unit (220) may include a signal transmission unit (320) that transmits a frequency signal corresponding to the selected frequency range to the heating structure (310).

[0135] Changing the size of the space of the heating unit (220) may mean that the size of the space changes in correspondence with the size of the aerosol generating article inserted into the aerosol generating device (100). In this case, a portion of the space for accommodating the aerosol generating article may be variably overlapped or unoverlapped so that the size of the hole into which the aerosol generating article is inserted can be adjusted.

[0136] For example, the heating structure (310) can be designed so that the cross-sectional area of ​​the space accommodating the aerosol-generating article is reduced as a frequency higher than the reference frequency is selected from among preset frequencies.

[0137] Additionally, the heating structure (310) can be designed so that the cross-sectional area of ​​the space accommodating the aerosol-generating article increases as a frequency lower than the reference frequency is selected from among preset frequencies.

[0138] The aerosol generating device (100) may further include an adjustment unit (330) that receives an input for selecting a frequency corresponding to an aerosol generating article (10) inserted into a heating unit (220) among preset frequencies. The adjustment unit (330) may be located near the top of the heating structure (310). The adjustment unit (330) may be provided with an inlet for receiving the aerosol generating article (10). The adjustment unit (330) may be provided with a member for adjusting the size of the hole corresponding to the thickness of the aerosol generating article (10).

[0139] For example, the member of the adjustment unit (330) may receive an input for setting an operation mode such as a first operation mode, a second operation mode, etc. For example, the first operation mode may be an operation mode that applies a frequency signal corresponding to a first frequency to an aerosol generating article (10). Additionally, the second operation mode may be an operation mode that applies a frequency signal corresponding to a second frequency to an aerosol generating article (10).

[0140] The input for setting the operation mode may be an input that physically adjusts the adjustment unit (330). The operation mode of the aerosol generating device (100) may be set by the input for setting the operation mode. For example, if the position of the member of the adjustment unit (330) when set to the first operation mode is the first position, and the position of the member of the adjustment unit (330) when set to the second operation mode is the second position, the size of the space accommodating the aerosol generating article (10) may be adjusted by changing the position of the member of the adjustment unit (330) from the first position to the second position. For example, by rotating the member of the adjustment unit (330) located at the first position in a preset direction to change it to the second position, the size of the inlet into which the aerosol generating article (10) is inserted may be adjusted to the size of the hole corresponding to the thickness of the aerosol generating article (10), and the size of the space of the heating structure (310) surrounding the aerosol generating article (10) may be adjusted. Here, the operating mode is related to the frequency applied to the aerosol generating article (10) in the aerosol generating device (100) and the space accommodating the aerosol generating article (10). Depending on the operating mode, the applied frequency and the size of the space may be changed.

[0141] For example, the heating structure (310) may form a space by connecting a plurality of plates that are formed along the longitudinal direction of the aerosol generating article (10). The connection structure of the plurality of plates may be changed according to the operating mode of the aerosol generating device (100). For example, if the operating mode requires the size of the space to be reduced, at least some of the plurality of plates may be overlapped. On the other hand, if the operating mode requires the size of the space to be expanded, the plurality of plates may not be overlapped and may be in an unfolded state.

[0142] Meanwhile, the adjustment unit (330) may be located near where the aerosol generating article (10) is inserted in the heating structure (310). The adjustment unit (330) may be a part of the heating structure (310) or may be combined with the heating structure (310) as a separate component. The size of the space of the heating unit (220) can be changed through the adjustment unit (330). The connection relationship of the unit structures constituting the heating structure (310) can be changed by adjustment through the adjustment unit (330).

[0143] Additionally, the adjustment unit (330) may receive an input for selecting a predetermined frequency among preset frequencies. The input for selecting a predetermined frequency may be an input for selecting an operating mode of the aerosol generating device (100).

[0144] The power supply unit (230) can supply power to the power generation unit (210) and the control unit (240). The control unit (240) can control the power generation unit (210) to generate a frequency signal corresponding to a selected frequency within a preset frequency range. By controlling the power generation unit (210), the control unit (240) can transmit the frequency signal corresponding to the selected frequency to the heating unit (220) and control the aerosol generating article to be heated through the heating unit (220).

[0145] FIG. 2b is a block diagram illustrating the configuration of a power generation unit (210) according to one embodiment.

[0146] Referring to FIG. 2b, the power generation unit (210) may include a frequency generation unit (212), a power amplifier (214), and a frequency selection unit (216). However, not all of the illustrated components are essential components. The power generation unit (210) may be implemented with more components than those illustrated, or with fewer components. The above components will be examined below.

[0147] The frequency generation unit (212) can generate a frequency signal within a preset frequency range. The frequency generation unit (212) can receive a frequency generation control signal from the control unit (240). Based on the frequency generation control signal, the frequency generation unit (212) can generate a frequency within a preset frequency range within a certain range and transmit it to the power amplifier (214). Additionally, the frequency generation unit (212) may include a first matching circuit that controls the output of the frequency signal so that optimal power is transmitted to the power amplifier (214).

[0148] The power amplifier (214) can adjust the magnitude of the output frequency signal by increasing or decreasing the amplitude of the frequency signal. For example, the power amplifier (214) can amplify the frequency signal generated by the frequency generation unit (212) and ensure that the quality of the frequency signal is not damaged during the amplification process.

[0149] The frequency selection unit (216) can select a frequency corresponding to an aerosol generating article inserted into the aerosol generating device (100). The frequency selection unit (216) may include a switching circuit or a filter circuit that selects a frequency corresponding to the size of the aerosol generating article inserted into the aerosol generating device (100) among preset frequencies.

[0150] Specifically, the switching circuit can select a specific frequency within the amplified frequency signal and output the specific frequency to transmit it to the heating unit (220). For example, the switching circuit may include a first switching circuit for selecting a first frequency and a second switching circuit for selecting a second frequency. The switching circuit receives a signal requesting the selection of a specific frequency from the control unit (240) and can control the operation of the first switching circuit and the second switching circuit so that the switching circuit can select a specific frequency.

[0151] The filter circuit can pass a band corresponding to a selected frequency signal, block a band corresponding to the remaining frequencies, and transmit the passed frequency signal to the heating unit (220). For example, the filter circuit can be implemented in various forms, such as a band-pass filter, a low-pass filter, or a high-pass filter. The filter circuit can pass a specific frequency band and block unnecessary frequencies.

[0152] The frequency selection unit (216) can output a frequency signal corresponding to the selected frequency. Additionally, the frequency selection unit (216) may include a second matching circuit that checks whether the impedance viewed from the frequency generation unit (212) toward the heating unit (220) matches the impedance viewed from the heating unit (220) toward the frequency generation unit (212), and controls the output of the frequency signal so that a preset power transfer condition is satisfied.

[0153] The frequency signal output through the frequency selection unit (216) is transmitted to the heating unit (220) of the aerosol generating device (100), and the heating structure (310) within the heating unit (220) can generate resonance at the selected frequency to efficiently heat the aerosol generating article (10).

[0154] FIGS. 3a and 3b are drawings illustrating the configuration of a heating structure according to one embodiment.

[0155] Referring to FIGS. 3a and 3b, the heating structure (310) may be provided with a space in which an aerosol generating article (10) can be received. For example, the heating structure (310) may be in the shape of a cylinder so that the aerosol generating article (10) can be inserted longitudinally. Here, the cylinder shape may be a hollow cylinder and may be tubular. Additionally, the heating structure (310) may be composed of a waveguide. The cross-section of the waveguide may be one of a circle, a square, or a polygon. The heating structure (310) may be composed of a conductive material. Additionally, all or part of the heating structure (310) may be composed of a conductive material.

[0156] The heating structure (310) may include a signal receiving unit (413-11, 413-12). The signal receiving unit (413-11, 413-12) may receive a frequency signal from the signal transmitting unit (320). The heating structure (310) may convert the received frequency signal into an electromagnetic wave based on the structure of the heating structure (310). Here, the heating structure (310) may perform the role of an antenna.

[0157] The converted electromagnetic waves generate electromagnetic induction in the interior and surface of the heating structure (310), and current can flow on the surface of the heating structure (310). When electrons inside the heating structure (310) move under the influence of the electric field and current flows, the current can generate a magnetic field around it. As the current changes, the magnetic field also changes, and the magnetic field can induce an electric field. Electromagnetic waves in which the magnetic field and the electric field are orthogonally coupled can be radiated into the interior of the heating structure (310).

[0158] Electromagnetic waves may reach and be absorbed by the aerosol generating article (10), and the dielectric material within the aerosol generating article (10) may be heated. For example, the aerosol generating article (10) may contain a polar material, and molecules within the polar material may be polarized by microwaves. The molecules may vibrate or rotate due to the polarization phenomenon and may generate frictional heat. The aerosol generating article (10) may be heated by frictional heat.

[0159] Additionally, the current flowing on the surface of the heating structure (310) can generate heat. The generated heat can heat the aerosol generating article (10).

[0160] Meanwhile, when the aerosol generating device (100) is the aerosol generating device (100) according to the embodiment of FIG. 1a, the signal receiving unit (413-11, 413-12) may be coupled to the feed pad of the signal transmitting unit (320). In this case, the feed pad to be coupled may be a feed pad selected from among a plurality of feed pads within the signal transmitting unit (320).

[0161] By adjusting the position of the heating structure (310), the feed pad to which the signal receiving unit (413-11, 413-12) is coupled with the signal transmitting unit (320) can be determined. That is, the structure of the heating unit (220) can be changed by adjusting the position of the heating structure (310). For example, the adjustment to change the position of the heating structure (310) may be an operation of rotating the heating structure (310) so that the signal receiving unit (413-11, 413-12) is positioned at a position corresponding to at least one feed pad. Additionally, the adjustment to change the position of the heating structure (310) may be an operation of moving the heating structure (310) so that the signal receiving unit (413-11, 413-12) is coupled with at least one feed pad at a position corresponding to at least one feed pad.

[0162] The signal receiving section (413-11, 413-12) may be formed as an end protruding longitudinally from the end of the heating structure (310). Referring to FIG. 3a, the signal receiving section (413-11) may be composed of two ends. By being composed of two ends, the signal receiving section (413-11) allows current to flow evenly in the heating structure (310), and the radiation pattern of the electromagnetic waves can also be formed symmetrically.

[0163] Meanwhile, when the aerosol generating device (100) is the aerosol generating device (100) according to the embodiment of FIG. 1b, the signal receiving part (413-11, 413-12) may be coupled to the feed pad of the signal transmitting part (320). For example, the feed pad may include an inductor. The shape of the feed pad may be a ring shape. Depending on the position where the signal receiving part (413-11, 413-12) of the heating structure (310) is coupled within the feed pad, the value of the inductance may be changed, and the resonance frequency may be changed depending on the value of the inductance.

[0164] The structure of the heating unit (220) can be changed by an adjustment that changes the position where the heating structure (310) is coupled to the feed pad. For example, the adjustment that changes the position of the heating structure (310) may include an operation of rotating the heating structure (310) so that the signal receiving unit (413-11, 413-12) of the heating structure (310) is positioned at a pre-coupled release position corresponding to a matching position within the feed pad. Additionally, the adjustment that changes the position of the heating structure (310) may include an operation of moving the heating structure (310) in the longitudinal direction of the heating structure (310) so that the signal receiving unit (413-11, 413-12) of the heating structure (310) is coupled to a coupling position within the feed pad from the release position.

[0165] The signal receiving section (413-11, 413-12) may be formed as an end protruding longitudinally from the end of the heating structure (310). Referring to FIG. 3a, the signal receiving section (413-1) may be composed of two ends. By being composed of two ends, the signal receiving section (413-1) allows current to flow evenly in the first structure (410-1), and the radiation pattern of the electromagnetic waves can also be formed symmetrically.

[0166] Meanwhile, even if the aerosol generating device (100) is the aerosol generating device (100) according to the embodiment of FIG. 1C, the signal receiving unit (413-11, 413-12) can be coupled with the feed pad of the signal transmitting unit (320).

[0167] FIG. 3b is a diagram illustrating the configuration of a heating structure (310) according to another embodiment. Referring to FIG. 3b, the signal receiving unit (413-12) may be composed of one end. The signal receiving unit (413-12) may be coupled to one of a plurality of feed pads or coupled to a specific location within the feed pad.

[0168] FIGS. 4a to 4c are drawings for explaining the configuration of a signal transmission unit and a heating unit when the aerosol generating device is an aerosol generating device (100) according to the embodiment of FIG. 1a.

[0169] FIG. 4a is a diagram illustrating the configuration of a signal transmission unit (320) according to one embodiment.

[0170] The signal transmission unit (320) can transmit a frequency signal corresponding to a specific frequency range to the heating structure (310). The signal transmission unit (320) may include a plurality of feed pads. The plurality of feed pads can transmit a frequency signal of a frequency range assigned to each feed pad within a preset frequency range to the heating structure (310).

[0171] Referring to FIG. 4a, the signal transmission unit (320) may include a first feed pad (511), a second feed pad (512), a third feed pad (513), and a fourth feed pad (514). Each feed pad (511, 512, 513, 514) may be a contact that supplies a frequency signal to the heating structure (310). For example, the signal transmission unit (320) may be implemented as a PCB (Printed Circuit Board) feed pad. The first feed pad (511), the second feed pad (512), the third feed pad (513), and the fourth feed pad (514) may be placed on the PCB feed pad. The current distribution and impedance characteristics of the heating structure (310) may differ for each feed pad. That is, the resonance frequency of the heating structure (310) may differ for each feed pad (511, 512, 513, 514). Here, the resonant frequency can represent a frequency that exhibits the least reflection loss in the heating structure (310) and can absorb maximum power to radiate electromagnetic waves.

[0172] Additionally, the signal transmission unit (320) may include impedance matching units (521, 522, 523, 524) corresponding to each feed pad (511, 512, 513, 514). The impedance matching units (521, 522, 523, 524) can adjust the impedance of the frequency signal transmitted from the feed pad to reduce the reflection loss of the frequency signal transmitted to the heating structure (310) and allow maximum power to be transmitted to the heating structure (310). In this case, the impedance matching units (521, 522, 523, 524) can minimize the impedance difference between the feed pad (511, 512, 513, 514) and the heating structure (310).

[0173] For example, the impedance matching section (521, 522, 523, 524) may be composed of at least one element among an inductor and a capacitor. The impedance matching section (521, 522, 523, 524) can perform impedance matching by filtering a signal of a specific frequency band. For example, the impedance of the signal transmission section (320) and the impedance of the heating structure (310) viewed from the signal transmission section (320) can be adjusted to match.

[0174] Meanwhile, as the feed pad coupled to the signal receiving part (413) of the heating structure (310) is changed, the impedance of the heating structure (310) is changed, and the resonance frequency may also be changed. When the resonance frequency is changed, the current density of the heating structure (310) changes, so the heating temperature for heating the aerosol generating article (10) may also change. That is, the heating temperature of the aerosol generating article (10) may change depending on the feed pad coupled to the signal receiving part (413) of the heating structure (310).

[0175] FIGS. 4b and FIGS. 4c are drawings illustrating the configuration of a heating unit according to one embodiment.

[0176] The heating unit (220) may include a heating structure (310) and a signal transmission unit (320). As illustrated in FIGS. 4b and 4c, the signal receiving unit (413) of the heating structure (310) may be coupled with a specific feed pad among a plurality of feed pads of the signal transmission unit (320). Depending on the feed pad coupled, the input impedance of the heating structure (310) can be controlled and the radiation characteristics of the heating structure (310) can be adjusted.

[0177] The signal receiving unit (413) can receive a frequency signal from a connected feed pad among a plurality of feed pads of the signal transmitting unit (320). The heating structure (310) can convert the received frequency signal into an electromagnetic wave based on the structure of the heating structure (310). Here, the heating structure (310) can perform the role of an antenna.

[0178] The converted electromagnetic waves generate electromagnetic induction in the interior and surface of the heating structure (310), and current can flow on the surface of the heating structure (310). When electrons inside the heating structure (310) move under the influence of the electric field and current flows, the current can generate a magnetic field around it. As the current changes, the magnetic field also changes, and the magnetic field can induce an electric field. Electromagnetic waves in which the magnetic field and the electric field are orthogonally coupled can be radiated into the interior of the heating structure (310).

[0179] In relation to the heating operation of an aerosol generating article (10) using a specific feed among a plurality of feed pads, for example, the frequency corresponding to the first feed pad is a first resonant frequency, and when the first feed pad and the signal receiving unit (413) are combined, the heating structure (310) can heat the aerosol generating article (10) in the range of a first heating temperature.

[0180] Additionally, the frequency corresponding to the second feed pad is the second resonant frequency, and when the second feed pad and the signal receiver (413) are combined, the heating structure (310) can heat the aerosol generating article (10) within the range of the second heating temperature.

[0181] Additionally, the frequency corresponding to the third feed pad is the third resonant frequency, and when the third feed pad and the signal receiver (413) are combined, the heating structure (310) can heat the aerosol generating article (10) within the range of the third heating temperature.

[0182] Additionally, the frequency corresponding to the fourth feed pad is the fourth resonant frequency, and when the fourth feed pad and the signal receiver (413) are combined, the heating structure (310) can heat the aerosol generating article (10) within the range of the fourth heating temperature.

[0183] Here, the first heating temperature, the second heating temperature, the third heating temperature, and the fourth heating temperature may represent different temperature ranges. Depending on the heating temperature, the taste and aroma of the aerosol generating article (10) may vary, and the vapor volume and smoking sensation may vary. For example, the smoking sensation may be related to the amount of nicotine evaporation. Specifically, the less the amount of nicotine evaporation, the lower the smoking sensation may be. If at least one of the taste, aroma, vapor volume, and smoking sensation of the aerosol generating article (10) changes, the satisfaction felt by the user also changes. The first to fourth heating temperatures may be set so that the levels of the taste, aroma, vapor volume, and smoking sensation of the aerosol generating article (10) are different. The heating structure (310) and the signal transmission unit (320) can be designed so that the resonance frequency of the heating structure (310), which changes according to each feed pad coupled with the signal receiving unit (413) of the heating structure (310), corresponds to the first heating temperature to the fourth heating temperature.

[0184] FIG. 4b illustrates a case in which the signal receiving part (413) in the heating structure (310) is composed of two ends, and each of the two ends is connected to feed pads. In this case, only one of the two feed pads may operate so that a frequency signal corresponding to the feed pad is transmitted to the heating structure (310). Alternatively, both of the two feed pads may operate so that a frequency signal corresponding to each feed pad is transmitted to the heating structure (310).

[0185] FIG. 4c illustrates a case where the signal receiving part (413) in the heating structure (310) is composed of one end, and the structure in which the end is coupled to the feed pad.

[0186] Meanwhile, in order to change the feed pad to which the signal receiving part (413) of the heating structure (310) is coupled, position adjustment of the heating structure (310) or the feed pad is required. Here, position adjustment may refer to a physical adjustment for selecting a feed pad connected to the heating structure (310). The physical adjustment may represent an operation of moving the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is coupled to at least one feed pad among the plurality of feed pads of the signal transmission part (320).

[0187] For example, the operation of moving the heating structure (310) may include the operation of rotating the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is positioned at a location corresponding to at least one feed pad, and the operation of moving the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is coupled with at least one feed pad of the signal transmission part (320) at the location where the signal receiving part (413) is positioned at least one feed pad.

[0188] Specifically, the heating structure (310) may be connected to an adjustment unit (330) for adjusting the coupling between the signal transmission unit (320) and the heating structure (310). By rotating the adjustment unit (330), the signal receiving unit (413) of the heating structure (310) may be moved to a position on the feed pad to be coupled. By pressing the adjustment unit (330) in the insertion direction of the aerosol generating article (10), the signal receiving unit (413) of the heating structure (310) may be coupled to the feed pad. Afterward, by pressing the adjustment unit (330) again in the insertion direction of the aerosol generating article (10), the signal receiving unit (413) of the heating structure (310) may be released from coupling to the feed pad. The above description is an example for setting a frequency signal corresponding to a specific frequency range through physical adjustment and may be implemented by other methods.

[0189] FIGS. 5a to 5c are drawings for explaining the configuration of a signal transmission unit and a heating unit when the aerosol generating device is an aerosol generating device (100) according to the embodiment of FIG. 1b.

[0190] FIG. 5a is a diagram illustrating the configuration of a signal transmission unit (320) according to one embodiment.

[0191] The signal transmission unit (320) can transmit a frequency signal corresponding to a specific frequency range to the heating structure (310). The signal transmission unit (320) may include a feed pad (510) that includes an inductor. The shape of the feed pad (510) may be various shapes, such as a curved shape or a ring shape. Depending on the position within the feed pad (510) that is coupled with the heating structure (310), the value of the inductance changes, and the resonance frequency of the heating structure (310) may change according to the changed value of the inductance.

[0192] Referring to FIG. 5a, any position within the feed pad (510) may be a contact that supplies a frequency signal corresponding to the arbitrary position to the heating structure (310). The signal transmission unit (320) may be implemented as a PCB (Printed Circuit Board) feed pad. The feed pad (510) may be placed on the PCB feed pad.

[0193] Depending on the position of the feed pad (510) coupled with the signal receiving part (413) of the heating structure (310), the current distribution and impedance characteristics of the heating structure (310) may vary. That is, the resonance frequency of the heating structure (310) may vary for each position of the feed pad (510). Here, the resonance frequency may represent a frequency at which the heating structure (310) exhibits the least reflection loss and can absorb maximum power to radiate electromagnetic waves.

[0194] Additionally, the signal transmission unit (320) may include an impedance matching unit (520) corresponding to the feed pad (510). The impedance matching unit (520) can adjust the impedance of the frequency signal transmitted from the feed pad (510) to reduce the reflection loss of the frequency signal transmitted to the heating structure (310) and to allow maximum power to be transmitted to the heating structure (310). In this case, the impedance matching unit (520) can minimize the impedance difference between the feed pad (510) and the heating structure (310).

[0195] For example, the impedance matching unit (520) may be composed of at least one of an inductor and a capacitor. The impedance matching unit (520) can perform impedance matching by filtering a signal of a specific frequency band. For example, the impedance of the signal transmission unit (320) and the impedance of the heating structure (310) viewed from the signal transmission unit (320) can be adjusted to match.

[0196] Meanwhile, as the position of the feed pad (510) coupled with the signal receiving part (413) of the heating structure (310) changes, the path of the current flowing through the feed pad (510) changes, and the value of the inductance may also change. The shorter the path of the current, the relatively lower the value of the inductance, and impedance matching can be achieved in a relatively high frequency band. On the other hand, the longer the path of the current, the relatively higher the value of the inductance, and impedance matching can be achieved in a relatively low frequency band.

[0197] FIGS. 5B and FIGS. 5C are drawings illustrating the configuration of a heating unit according to one embodiment.

[0198] The heating unit (220) may include a heating structure (310) and a signal transmission unit (320). As illustrated in FIGS. 5b and 5c, the signal receiving unit (413) of the heating structure (310) may be coupled at a specific location within the feed pad of the signal transmission unit (320). Depending on the location of coupling, the resonance frequency of the heating structure (310) may be changed and the radiation characteristics of the heating structure (310) may be adjusted.

[0199] The signal receiving unit (413) can receive a frequency signal from a specific location connected within the feed pad of the signal transmitting unit (320). The heating structure (310) can convert the received frequency signal into an electromagnetic wave based on the structure of the heating structure (310). Here, the heating structure (310) can perform the role of an antenna.

[0200] The converted electromagnetic waves generate electromagnetic induction in the interior and surface of the heating structure (310), and current can flow on the surface of the heating structure (310). When electrons inside the heating structure (310) move under the influence of the electric field and current flows, the current can generate a magnetic field around it. As the current changes, the magnetic field also changes, and the magnetic field can induce an electric field. Electromagnetic waves in which the magnetic field and the electric field are orthogonally coupled can be radiated into the interior of the heating structure (310).

[0201] Meanwhile, by performing an adjustment to move the heating structure (310), the signal receiving part (413) of the heating structure (310) can be coupled to a specific location within the feed pad of the signal transmitting part (320). The adjustment to move the heating structure (310) may be a physical adjustment to change the position of the heating structure (310). For example, the adjustment to move the heating structure (310) may include the operation of rotating the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is positioned at a pre-coupled release position corresponding to a matching position within the feed pad, and the operation of moving the heating structure (310) in the longitudinal direction of the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is coupled to a coupling position within the feed pad from the release position.

[0202] Additionally, the heating structure (310) may be connected to an adjustment unit for adjusting the coupling between the signal transmission unit (320) and the heating structure (310). By rotating the adjustment unit, the signal receiving unit (413) of the heating structure (310) may be moved to a position on the feed pad to be coupled. By pressing the adjustment unit in the direction of insertion of the aerosol generating article, the signal receiving unit (413) of the heating structure (310) may be coupled to the feed pad. Afterward, by pressing the adjustment unit again in the direction of insertion of the aerosol generating article, the signal receiving unit (413) of the heating structure (310) may be uncoupled from the feed pad. The above description is an example for coupling or uncoupling between the heating structure (310) and the signal transmission unit (320) and may be implemented by other methods.

[0203] Additionally, when rotating the heating structure (310), the angle at which the heating structure (310) is rotated can be pre-set. Specifically, the heating structure (310) can be designed to rotate by a pre-set rotation angle. For example, the rotation angle of the heating structure (310) can be designed to rotate by 10 degrees, and the maximum rotation angle can also be pre-set. For example, the heating structure (310) can be rotated counterclockwise by 10 degrees, and the value of the inductance can be increased each time the rotation angle increases. When the value of the inductance increases, the resonance frequency of the heating structure (310) can be lowered.

[0204] Meanwhile, due to the external environment in which the aerosol generating device (100) is operated, or errors in the manufacturing process of the aerosol generating device (100), there may be a slight difference between the theoretically designed reference resonant frequency and the resonant frequency in the actual environment. Due to the difference between the theoretically designed reference resonant frequency and the resonant frequency in the actual environment, heating information such as the heating temperature and heating speed used to heat the aerosol generating item may not satisfy the pre-designed reference heating information, and impedance matching may not occur. Therefore, in order to achieve impedance matching that matches the output impedance of the signal transmission unit (320) with the input impedance of the heating structure (310), an adjustment to move the heating structure (310) may be performed.

[0205] For example, if the heating temperature of the aerosol generating article does not reach the target temperature, the heating speed can be increased by increasing the power delivered to the heating structure (310) so that the target temperature can be reached. For example, the adjustment to move the heating structure (310) may be an adjustment to increase the value of the inductance of the feed pad of the signal transmission unit (320). Since inductance is inversely proportional to the length of the inductor, for example, the adjustment to move the heating structure (310) may be an adjustment to decrease the length of the inductor. Also, as shown in FIG. 5b, the signal receiving unit (413) of the heating structure (310) may be coupled in a position close to the impedance matching unit of the signal transmission unit (320).

[0206] For example, if the heating temperature of the aerosol generating article exceeds the target temperature, the temperature rise can be suppressed by reducing the power delivered to the heating structure (310) to lower the heating speed. In this case, the power delivered to the heating structure (310) can be reduced by setting the frequency band high. For example, the adjustment to move the heating structure (310) may be an adjustment to reduce the value of the inductance of the feed pad of the signal transmission unit (320). Since inductance is inversely proportional to the length of the inductor, for example, the adjustment to move the heating structure (310) may be an adjustment to increase the length of the inductor. Also, as shown in FIG. 5c, the signal receiving unit (413) of the heating structure (310) may be coupled at a location not close to the impedance matching unit of the signal transmission unit (320). That is, the coupling location shown in Fig. 5c may be a location further from the impedance matching part than the coupling location shown in Fig. 5b.

[0207] Depending on the heating temperature, the taste and aroma of the aerosol generating material may vary, as may the vapor volume and smoking sensation. For example, smoking sensation may be related to the amount of nicotine evaporation. Specifically, the less nicotine evaporates, the lower the smoking sensation may be. If at least one of the taste, aroma, vapor volume, or smoking sensation of the aerosol generating material changes, the satisfaction felt by the user also changes. Therefore, in cases where impedance matching is not achieved due to external environmental factors, the value of the inductance of the feed pad can be finely adjusted to ensure that the aerosol generating material is heated to a target temperature.

[0208] FIGS. 6a to 6g are drawings for explaining the structure of a heating structure when the aerosol generating device is an aerosol generating device (100) according to the embodiment of FIG. 1c.

[0209] FIGS. 6a and 6b are drawings for explaining the structure of a heating structure (310-1) according to an embodiment in which a first frequency lower than a second frequency is selected.

[0210] Referring to FIGS. 6a and 6b, the heating structure (310-1) may be in the shape of a cylinder so that an aerosol generating article can be inserted longitudinally. Here, the cylinder shape may be a hollow cylinder or a tubular shape. Additionally, the heating structure (310-1) may be composed of a waveguide. The cross-section of the waveguide may be one of a circle, a square, or a polygon. The heating structure (310-1) may be composed of a conductive material. Additionally, all or part of the heating structure (310-1) may be composed of a conductive material.

[0211] The heating structure (310-1) may include a signal receiving unit (413-1). The signal receiving unit (413-1) may receive a frequency signal from the signal transmitting unit (320). The heating structure (310-1) may convert the received frequency signal into an electromagnetic wave based on the structure of the heating structure (310-1). Here, the heating structure (310-1) may perform the role of an antenna.

[0212] The converted electromagnetic waves generate electromagnetic induction in the interior and surface of the heating structure (310-1), and current can flow on the surface of the heating structure (310-1). When electrons inside the heating structure (310-1) move under the influence of the electric field and current flows, the current can generate a magnetic field around it. As the current changes, the magnetic field also changes, and the magnetic field can induce an electric field. Electromagnetic waves in which the magnetic field and the electric field are orthogonally coupled can be radiated into the interior of the heating structure (310-1).

[0213] Electromagnetic waves can reach and be absorbed by the aerosol-generating article, and the dielectric material within the aerosol-generating article can be heated. For example, the aerosol-generating article may contain a polar material, and molecules within the polar material may be polarized by microwaves. The molecules may vibrate or rotate due to the polarization phenomenon and generate frictional heat. The aerosol-generating article can be heated by frictional heat.

[0214] Additionally, the current flowing on the surface of the heating structure (310-1) can generate heat. The generated heat can heat the aerosol generating article.

[0215] When a first frequency corresponding to the first aerosol generating article (10-1) inserted into the aerosol generating device (100) is selected from among preset frequencies, the aerosol generating device (100) can adjust the structure of the space into which the first aerosol generating article (10-1) is inserted to match the size of the first aerosol generating article (10-1). The space can be changed to a structure that surrounds the first aerosol generating article (10-1). For example, the space can accommodate a portion of the aerosol generating article for a preset length of the total length of the first aerosol generating article (10-1). The size of the heating structure (310-1) can be changed based on an input that operates the adjustment unit (430).

[0216] Referring to FIG. 6b, the heating structure (310-1) may be formed of a plurality of plates (611, 612, 613, 614, 615, 616, 617, 618). The plurality of plates (611, 612, 613, 614, 615, 616, 617, 618) may have a length formed in the longitudinal direction of the first aerosol generating article (10-1). Referring to FIG. 6b, the heating structure (310-1) may be composed of eight unit plates, and each unit plate may be connected to an adjacent unit plate.

[0217] The portion of the unit plate forming the hole of the heating structure (310-1) may be in a curved shape. An aerosol generating article (10-1) may be inserted through the hole of the heating structure (310-1). For example, the unit plate may be composed of a plate in which the shape of an arc forming a circle extends a certain length in the longitudinal direction of the aerosol generating article.

[0218] For example, the first space corresponding to the first frequency may be a structure in which a plurality of unit plates are connected in an unfolded state without overlapping each other. The size of the first space is matched to the size of the first aerosol generating article (10-1), and the first aerosol generating article (10-1) may be accommodated in the first space for a predetermined length of the total length of the first aerosol generating article (10-1). Additionally, the structure of the first space may be adjusted so that the inner wall of the first space and the aerosol generating article are spaced apart by a predetermined distance. That is, a plurality of unit plates (611, 612, 613, 614, 615, 616, 617, 618) constituting the heating structure (310-1) may be connected based on the structure of the first space.

[0219] Meanwhile, the first frequency is a frequency for operating the aerosol generating device (100) in a first operating mode, and may be the first resonance frequency of the heating structure (310-1) formed based on the space changed according to the first operating mode.

[0220] FIGS. 6c to 6g are drawings for explaining the structure of a heating structure (310-2) according to an embodiment in which a second frequency higher than a first frequency is selected.

[0221] For example, to use a second frequency higher than the first frequency as the second resonant frequency of the aerosol generating device (100), the size of the heating structure (310-2) for applying the second frequency may be smaller than the size of the heating structure (310-2) for applying the first frequency. As the frequency increases, the wavelength becomes shorter and power consumption increases, so by reducing the size of the heating structure (310-2), the concentration of the electromagnetic field can be increased.

[0222] Referring to FIG. 6c, when a second frequency corresponding to the second aerosol generating article (10-2) inserted into the aerosol generating device (100) is selected from among preset frequencies, the aerosol generating device (100) can adjust the structure of the space into which the second aerosol generating article (10-2) is inserted to match the size of the second aerosol generating article (10-2). The space can be changed to a structure that surrounds the second aerosol generating article (10-2). The size of the second aerosol generating article (10-2) may be smaller than the size of the first aerosol generating article. Here, the size comparison can be performed by comparing the thickness and cross-sectional area of ​​the aerosol generating article. Additionally, the space can accommodate a portion of the aerosol generating article for a preset length of the total length of the second aerosol generating article (10-2).

[0223] Referring to FIGS. 6c and 6d, when a second aerosol generating article (10-2) that is thinner than the first aerosol generating article (10-1) is inserted, the heating structure (310-2) can be reduced by a space corresponding to the thickness of the second aerosol generating article (10-2). In this case, the size of the hole (720) into which the second aerosol generating article is inserted in the adjustment part (330) becomes smaller than the size of the hole (710) when the first aerosol generating article (10-1) is inserted.

[0224] Referring to FIG. 6c and FIG. 6e, when a second aerosol generating article (10-2) that is thinner than the first aerosol generating article (10-1) is inserted, the size of the heating structure (310-2) is adjusted, so the position of the signal transmitting part (320) to which the signal receiving part (413-2) within the heating structure (310-2) is connected can also be adjusted. For example, when the first aerosol generating article (10-1) is inserted, the signal receiving unit (413-1) may be located at a first position (631, 632, 633, 634) within the signal transmitting unit (320), and when the second aerosol generating article (10-2) is inserted, the signal receiving unit (413-2) may be located at a second position (641, 642, 643, 644) within the signal transmitting unit (320).

[0225] Referring to FIGS. 6b and 6f, as the frequency is selected as the second frequency, the heating structure (310-2) can be changed to be smaller than the size of the heating structure (310-1) corresponding to the first frequency. The size of the heating structure (310-2) can be changed based on an input that operates the member of the adjustment unit (330).

[0226] As described in FIG. 6b, the heating structure (310-1) may be formed of a plurality of plates. The plurality of plates may have a length formed along the longitudinal direction of the second aerosol generating article (10-2). The heating structure (310-1) may be composed of eight unit plates, and each unit plate may be connected to an adjacent unit plate. To reduce the cross-sectional area of ​​the heating structure (310-1), at least some of the unit plates may be designed to overlap. For example, two unit plates may be overlapped to form a space for accommodating the aerosol generating article. When the structure of the heating structure (310-1) is changed by overlapping the unit plates, the signal transmission unit (320) may also change in size or the location connected to the signal receiving unit in correspondence with the structure of the heating structure (310-1).

[0227] For example, the heating structure (310-1) may be connected to a control unit (330) that receives a control input for setting the operating mode of the aerosol generating device (100). Specifically, if the member of the control unit (330) is rotated in a preset first direction, the frequency to be applied may be increased, and the aerosol generating device (100) may be operated in a second operating mode. Conversely, if the member of the control unit (330) is rotated in a direction opposite to the first direction, the frequency to be applied may be lowered, and the aerosol generating device (100) may be operated in a first operating mode.

[0228] In this case, for example, to operate from a first operating mode to a second operating mode, the structure of the heating structure (310-1) can be configured such that, as shown in FIG. 6f, eight unit plates are stacked in pairs to form four plates (621, 622, 623, 624) that form the structure of the heating structure (310-2). In this case, the heating structure (310-2) can be composed of four plates formed by stacking eight unit plates in pairs, and the radius of each structure of the heating structure (310-2) can be reduced while maintaining a preset spacing.

[0229] Meanwhile, the second frequency is a frequency for operating the aerosol generating device (100) in a second operating mode, and may be the second resonance frequency of the heating structure (310-2) formed based on the space changed according to the second operating mode.

[0230] The structure illustrated in FIG. 6f is an example of a heating structure (310-2), and each structure may have a space formed with more than four plates (621, 622, 623, 624) or a space formed with fewer than four plates (621, 622, 623, 624).

[0231] When there are multiple resonant frequencies selectable in the aerosol generating device (100), the aerosol generating device (100) may be operated in multiple operating modes. A member of the adjustment unit may receive an input that allows selection of multiple operating modes. For example, multiple operating modes may be selected according to the rotation input level of the member of the adjustment unit. As the member of the adjustment unit is rotated in a first direction, the size of the space accommodating the aerosol generating article (10) may be reduced, and the magnitude of the resonant frequency may be increased.

[0232] FIG. 6g is a drawing illustrating an example in which, as an embodiment different from FIG. 6c, when a second aerosol generating article (10-2) that is thinner than the first aerosol generating article (10-1) is inserted, the space for accommodating the second aerosol generating article (10-2) in the heating structure (310-2) is reduced, and the size of the adjustment part (330-2) and the signal transmission part (320-2) is also reduced.

[0233] FIG. 7a is a graph for explaining the reflection characteristics according to frequency at the position of the feed pad, in the case where, according to one embodiment, the aerosol generating device is the aerosol generating device according to the embodiment of FIG. 1a.

[0234] Referring to the graph in Fig. 7a, the y-axis represents the ratio of signals input to the heating structure (310) that are reflected back, and the x-axis represents the frequency. The closer to 0dB, the more reflection there is, and the closer the negative value is to infinity, the less reflection there is.

[0235] For example, the first region (711) on the graph represents the reflection characteristics of the heating structure (310) at the first feed pad, the second region (712) represents the reflection characteristics of the heating structure (310) at the second feed pad, the third region (713) represents the reflection characteristics of the heating structure (310) at the third feed pad, and the fourth region (714) represents the reflection characteristics of the heating structure (310) at the fourth feed pad. The resonant frequency corresponding to each feed pad represents a frequency in which the loss is minimized due to minimal reflection in the frequency band of each region.

[0236] FIG. 7b is a graph for explaining the reflection characteristics according to frequency at the position of the feed pad, in the case where, according to one embodiment, the aerosol generating device is the aerosol generating device according to the embodiment of FIG. 1b.

[0237] Referring to the graph in Fig. 7b, the y-axis represents the ratio of signals that are reflected back from the signal input to the heating structure (310), and the x-axis represents the frequency. The closer to 0dB, the more reflection there is, and the closer the negative value is to infinity, the less reflection there is.

[0238] For example, the first curve (720) on the graph represents the theoretical reflection characteristics of the aerosol generating device (100), the second curve (730) represents the reflection characteristics when the signal receiving part (413) of the heating structure (310) is coupled to the first matching position of the feed pad as shown in FIG. 5b, and the third curve (740) represents the reflection characteristics when the signal receiving part (413) of the heating structure (310) is coupled to the second matching position of the feed pad as shown in FIG. 5c. In addition, the frequency corresponding to the region (750) with a low dB value in each curve represents the resonance frequency and represents a frequency at which the loss is minimized due to low reflection.

[0239] For example, if the heating temperature for heating the aerosol generating article does not reach the target temperature, the adjustment for moving the heating structure (310) may be an adjustment that increases the value of the inductance of the feed pad. When the value of the inductance is relatively increased, as shown in the first curve (720) and the second curve (730), the resonant frequency may be a first resonant frequency (f1) that is higher than the reference resonant frequency (f0).

[0240] For example, if the heating temperature of the aerosol generating article exceeds the target temperature, the adjustment of moving the heating structure (310) may be an adjustment that reduces the value of the inductance of the feed pad. When the value of the inductance is relatively reduced, as shown in the first curve (720) and the third curve (740), the resonant frequency may be a second resonant frequency (f2) lower than the reference resonant frequency (f0).

[0241] FIG. 7c is a graph for explaining frequency characteristics according to the frequency applied to the heating part of an aerosol generating device when, according to one embodiment, the aerosol generating device is an aerosol generating device according to the embodiment of FIG. 1c.

[0242] Referring to the graph in Fig. 7c, the y-axis represents the ratio of signals input to the heating structure that are reflected back, and the x-axis represents the frequency. A value closer to 0dB indicates more reflection, while a value closer to infinity indicates less reflection.

[0243] For example, the first region (760) on the graph represents the reflection characteristics of the heating structure at the first frequency, and the second region (770) represents the reflection characteristics of the heating structure at the second frequency.

[0244] Meanwhile, if the relationship between the first frequency and the second frequency is not a multiple relationship, or if the difference between the first frequency and the second frequency is within a preset range, the second frequency can be made to operate as a resonant frequency based on the structure of the heating structure.

[0245] For example, the heating structure may include at least one opening in its representation. Here, the at least one opening may be in the form of a slit or a slot. Additionally, the at least one opening may be an open hole formed with one end open or a closed hole formed without being open to the outside.

[0246] FIG. 8 is a flowchart illustrating the operation method of an aerosol generating device according to one embodiment.

[0247] Referring to FIG. 8, in step S810, the aerosol generating device (100) may perform an adjustment to change the structure of the heating unit (220) that heats the aerosol generating article (10) in order to set a frequency signal corresponding to a specific frequency range within a preset frequency range.

[0248] For example, the aerosol generating device (100) can perform physical adjustments to select a feed pad of a signal transmission unit (320) for transmitting a frequency signal of a specific frequency range to a signal receiving unit (413) of a heating structure (310).

[0249] Here, physical adjustment may be an operation of moving the heating structure (310) so that the signal receiving part (413) of the heating structure (310) is coupled with at least one feed pad among the plurality of feed pads of the signal transmitting part (320).

[0250] In step S820, the aerosol generating device (100) can generate a frequency signal based on power supplied from the power supply unit (230).

[0251] In step S830, the aerosol generating device (100) can transmit a frequency signal to the heating structure (310) of the heating unit (220) through the signal transmission unit (320) of the heating unit (220).

[0252] In step S840, the aerosol generating device (100) can heat the aerosol generating article (10) based on a frequency signal through the heating structure (310).

[0253] FIG. 9 is a flowchart illustrating the operation method of an aerosol generating device according to another embodiment.

[0254] Referring to FIG. 9, in step S910, the aerosol generating device (100) may perform an adjustment to change the structure of the heating unit (220) that heats the aerosol generating article in order to change the resonant frequency within a preset frequency range.

[0255] For example, the aerosol generating device (100) can variably adjust the value of the inductance of the feed pad of the signal transmission unit (320). Specifically, the aerosol generating device (100) can perform an adjustment to move the heating structure (310) so that the signal receiving unit (315) of the heating structure (310) is coupled to a matching position for changing the resonant frequency within the feed pad.

[0256] Here, the adjustment for moving the heating structure (310) may include the operation of rotating the heating structure (310) so that the signal receiving part (315) of the heating structure (310) is positioned at a pre-coupling release position corresponding to a matching position within the feed pad, and the operation of moving the heating structure (310) in the longitudinal direction of the heating structure (310) so that the signal part of the heating structure (310) is coupled to a coupling position within the feed pad when the signal receiving part (315) of the heating structure (310) is at the release position.

[0257] For example, if the heating temperature for heating the aerosol generating article does not reach the target temperature, the aerosol generating device (100) can perform an adjustment to increase the value of the inductance of the feed pad of the signal transmission unit (320).

[0258] For example, if the heating temperature of the aerosol generating article exceeds the target temperature, the aerosol generating device (100) can perform an adjustment to reduce the value of the inductance of the feed pad of the signal transmission unit (320).

[0259] In step S920, the aerosol generating device (100) can generate a frequency signal corresponding to a changed resonant frequency based on the power supplied from the power supply unit (230) and the structure of the changed heating unit (220).

[0260] In step S930, the aerosol generating device (100) can transmit a frequency signal to the heating structure (310) of the heating unit (220) through the signal transmission unit (320) of the heating unit (220).

[0261] In step S940, the aerosol generating device (100) can heat an aerosol generating article based on a frequency signal through a heating structure (310).

[0262] FIG. 10 is a flowchart illustrating the operation method of an aerosol generating device according to another embodiment.

[0263] Referring to FIG. 10, in step S1010, the aerosol generating device (100) may change the size of the space of the heating section for heating the aerosol generating article based on a frequency selected within a preset frequency range. The space of the heating section may be a space for accommodating at least a portion of the aerosol generating article.

[0264] For example, the aerosol generating device (100) can change the size of the space so that the cross-sectional area of ​​the space becomes smaller when a frequency higher than the reference frequency is selected among preset frequencies.

[0265] As another example, the aerosol generating device (100) can change the size of the space so that the cross-sectional area of ​​the space increases when a frequency lower than the reference frequency is selected among preset frequencies.

[0266] In step S720, the aerosol generating device (100) can generate a frequency signal corresponding to a selected frequency based on power supplied from a power supply unit.

[0267] In step S730, the aerosol generating device (100) can transmit a frequency signal to the heating structure of the heating part.

[0268] For example, the aerosol generating device (100) can acquire a frequency signal corresponding to a selected frequency through a frequency selection unit. The aerosol generating device (100) can transmit the frequency signal corresponding to the selected frequency to a heating structure.

[0269] In step S740, the aerosol generating device (100) can heat an aerosol generating article based on a frequency signal through a heating structure.

[0270] The aerosol generating device (100) described in the present disclosure may be implemented as a hardware component, a software component, and / or a combination of a hardware component and a software component. Additionally, the present disclosure may be provided in the form of a computer program stored on a computer-readable storage medium to perform a method of operating the aerosol generating device (100). Additionally, the present disclosure may be written as a program executable on a computer and may be implemented on a general-purpose digital computer that operates such a program using a computer-readable storage medium.

[0271] Such computer-readable storage media may be read-only memory (ROM), random-access memory (RAM), flash memory, CD-ROMs, CD-Rs, CD+Rs, CD-RWs, CD+RWs, DVD-ROMs, DVD-Rs, DVD+Rs, DVD-RWs, DVD+RWs, DVD-RAMs, BD-ROMs, BD-Rs, BD-R LTHs, BD-REs, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid-state disk (SSD), and may be any device capable of storing instructions or software, related data, data files, and data structures, and providing instructions or software, related data, data files, and data structures to a processor or computer so that the processor or computer can execute instructions.

[0272] Although the embodiments have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

Claims

1. A power generation unit that generates a frequency signal within a preset frequency range; and A space is provided for accommodating at least a portion of an aerosol-generating article, and a heating unit is included for heating the aerosol-generating article based on a frequency signal generated by the power generation unit. The above heating unit is an aerosol generating device comprising a heating structure in which the structure of the heating unit is changed according to an adjustment that sets a frequency signal corresponding to a specific frequency range within the above preset frequency range.

2. In Paragraph 1, The heating unit above is, An aerosol generating device comprising a signal transmission unit that transmits a frequency signal corresponding to the specific frequency range to the heating structure based on the structure of the heating unit modified according to the above adjustment.

3. In Paragraph 2, The above signal transmission unit includes a plurality of feed pads, and The above plurality of feed pads transmit a frequency signal of a frequency range assigned to each feed pad within the preset frequency range to the heating structure, an aerosol generating device.

4. In Paragraph 2, The above adjustment is, An aerosol generating device characterized by a physical adjustment for selecting a feed pad of a signal transmission unit for transmitting a frequency signal of a specific frequency range to a signal receiving unit of the heating structure.

5. In Paragraph 4, The above physical adjustment is, An aerosol generating device that exhibits an operation of moving the heating structure so that the signal receiving part of the heating structure is coupled with at least one feed pad among a plurality of feed pads of the signal transmitting part.

6. In Paragraph 5, The above operation is, The operation of rotating the heating structure so that the signal receiving part of the heating structure is positioned at a location corresponding to the at least one feed pad; and An aerosol generating device comprising the operation of moving the heating structure such that the signal receiving part of the heating structure is coupled with the at least one feed pad at a position corresponding to the at least one feed pad.

7. In Paragraph 5, An aerosol generating device further comprising an adjustment unit for releasing the coupling between the signal receiving unit of the heating structure and the at least one feed pad.

8. In Paragraph 2, The above heating structure is, An aerosol generating device that heats the aerosol generating article based on a frequency signal corresponding to a feed pad coupled to the heating structure among a plurality of feed pads of the signal transmission unit.

9. In Paragraph 8, The above heating structure is, An aerosol generating device that controls the temperature range for heating the aerosol generating article differently according to the combined feed pad.

10. In Paragraph 1, A control unit that controls the power generation unit to generate the frequency signal within the preset frequency range; and An aerosol generating device further comprising a power supply unit that supplies power to the power generating unit and the control unit.

11. A step of performing an adjustment to change the structure of a heating unit that accommodates at least a portion of an aerosol-generating article and heats the aerosol-generating article, in order to set a frequency signal corresponding to a specific frequency range within a preset frequency range; A step of generating the frequency signal based on power supplied from a power supply unit; A step of transmitting the frequency signal to the heating structure of the heating unit through the signal transmission unit of the heating unit; A method of operating an aerosol generating device comprising the step of heating the aerosol generating article based on the frequency signal through the heating structure.

12. In Paragraph 11, The step of performing an adjustment to change the structure of the heating unit is, A method of operation of an aerosol generating device comprising the step of performing a physical adjustment to select a feed pad of a signal transmitting unit for transmitting a frequency signal of a specific frequency range to a signal receiving unit of the heating structure.

13. In Paragraph 12, The above physical adjustment is, A method of operation of an aerosol generating device, wherein the heating structure is moved such that the signal receiving portion of the heating structure is coupled with at least one feed pad among a plurality of feed pads of the signal transmitting portion.

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