RU2827426C1 - Device for generating microparticles with induction heater - Google Patents

Abstract

FIELD: smoking accessories.

SUBSTANCE: device with induction heating for generating microparticles of capturing and portable size includes an aerosol-forming substrate inside, has a cavity for a smoking article, including outer wrapping paper, and forms an aerosol by heating the aerosol-forming substrate of the smoking article, wherein the device for generating microparticles comprises: a multiple-wound excitation coil, installed inside the device; susceptor located inside the excitation coil so as to be surrounded by the excitation coil inside the device, which is made of a hollow cylindrical thin sheet defining a cavity, and is heated to temperature of 400° or lower by induction heating caused by eddy current losses during reaction with the excitation coil, wherein the inner surface of the susceptor is in contact with at least a portion of the outer surface of the wrapping paper of the smoking article placed in the cavity, and heated susceptor, by heating inductively, heats aerosol-forming substrate inside wrapping paper due to heat transfer, thereby forming an aerosol; an insulating part provided between the current collector and the excitation coil inside the device to prevent heat transfer from the current collector to the excitation coil; structure located inside the device for supporting at least a portion of one or more of the susceptor and the excitation coil; susceptor temperature obtaining unit located inside the device to obtain susceptor temperature; storage battery provided inside the device, which functions as a DC power supply; and a control unit electrically connected to the excitation coil, the susceptor temperature obtaining unit and the battery, which receives DC power from the battery, supplies to the excitation coil alternating current with resonant frequency or alternating current with frequency far from the resonant frequency, and inductively heats the susceptor to the specified temperature, wherein the structure includes a double-layer pipe consisting of a ferrite layer for preventing magnetic field leakage from the excitation coil and an insulating layer for preventing heat transfer from the susceptor to other components, which is configured to cover the outer side of the excitation coil.

EFFECT: invention provides easy control of heat release from the sensor by direct measurement of the sensor temperature.

19 cl, 18 dwg

Description

Field of technology

[1] The present invention relates to a device for generating microparticles with an induction heater.

Prior art

[2] FIG. 1 is a view showing an induction heating device for heating an aerosol-forming substrate disclosed in International Publication No. WO 2015/17725, which relates to the relevant prior art. The induction heating device 1 includes a device body 10 made of plastic and a DC power source including a rechargeable battery Pa.

[3] The induction heating device 1 includes a docking port 12 including a rib 12a for docking the induction heating device 1 with a charging station or charger for charging a rechargeable battery 11a. In addition, the induction heater 1 includes an electronic power supply device 13 configured to operate, for example, at a frequency of 5 MHz. The electronic power supply device 13 is electrically connected to the rechargeable battery 11a via a corresponding electrical connecting portion 13a.

[4] The tobacco-containing solid aerosol-forming substrate 20, including the susceptor 21, is placed in the cavity 14 at the proximal end of the body of the device 10, and during operation the inductor L2 (a cylindrical spirally wound inductance coil) is inductively connected to the susceptor 21 of the tobacco-containing solid aerosol-forming substrate 20 of the smoking article 2. The filter segment 22 of the smoking article 2 is located outside the cavity 14 of the induction heating device 1, allowing the consumer to inhale the aerosol through the filter segment 22 during operation.

[5] The induction heating device includes an inductor located thermally close to the aerosol-forming substrate, and the aerosol-forming substrate includes a receptor. The alternating magnetic field of the inductor induces eddy currents and hysteresis losses in the receiver, thereby allowing the receiver to heat the aerosol-forming substrate to a temperature at which volatile components can be released. Since the heating of the susceptor is a non-contact process, the temperature of the aerosol-forming substrate cannot be measured directly. For this reason, it is difficult to determine when the user takes a puff during smoking.

ESSENCE OF THE INVENTION

[6] The present invention is directed to a device for generating microparticles with inductive heating, which includes a sensor as part of the device and is capable of easily controlling the heat generation from the sensor by directly measuring the temperature of the sensor.

[7] In addition, the present invention aims to provide an induction heating microparticle generating apparatus that can avoid a decrease in efficiency because the magnetic heating element that generates heat by the excitation coil transfers heat to the excitation coil as it generates heat.

[8] The present invention provides a device for generating microparticles with inductive heating, including: an excitation coil; a current collector in which inductive heating occurs due to eddy current losses during interaction with the excitation coil; and an insulating element that screens heat between the current collector and the excitation coil.

[9] Furthermore, the present invention provides a device for generating microparticles with induction heating, including: an excitation coil; a container for storing a liquid; and a heating element configured as a receiver for evaporating the liquid.

[10] Thus, the present disclosure provides a grippable, portable microparticle generating device that includes an aerosol-forming substrate inside, has a cavity into which a smoking article wrapped on the outside with wrapping paper can be inserted, and generates an aerosol by heating the aerosol-forming substrate on the smoking article inserted into the cavity, wherein the microparticle generating device includes: a multi-wound excitation coil located inside the device; a suspensor located inside the excitation coil so as to be surrounded by the excitation coil inside the device, which is made of a hollow cylindrical thin sheet defining a cavity and is heated to a temperature of 400°C or lower due to induction heating caused by eddy current losses during reaction with the excitation coil, wherein the inner surface of the suspensor contacts at least a part of the outer surface of the wrapping paper of the smoking article placed in the cavity, and the heated suspensor, being heated inductively, heats an aerosol-forming substrate inside the wrapping paper due to heat transfer, forming an aerosol; an insulating part located between the suspensor and the excitation coil inside the device, for preventing heat transfer from the suspensor to the excitation coil; a structure located inside the device and supporting at least a part of one or more of the suspensor and the excitation coil; a suspensor temperature obtaining unit located inside the device, for obtaining the suspensor temperature; a storage battery located inside the device and performing the function of a direct current power source; and a control unit electrically connected to the excitation coil, the susceptor temperature obtaining unit and the battery, which receives power from the battery with direct current, supplies alternating current with a resonant frequency or alternating current with a frequency shifted from the resonant frequency to the excitation coil, and inductively heats the susceptor to a specified temperature.

[11] In some embodiments, the microparticle generating device may further include a sensor that is inserted through the lower central portion of the smoking article inserted into the cavity and is heated upon direct contact with the aerosol-forming substrate within the smoking article.

[12] In some embodiments, the sensor may be made from a thin sheet of stainless steel.

[13] In some embodiments, the insulating portion may be an air layer provided between the current collector and the excitation coil.

[14] In some embodiments, the structure for supporting at least a portion of one or more of the current collector and the excitation coil may be an insulating structure that is made of one or more selected from a heat-resistant plastic, aerogel, ferrite, or paper and functions as an insulating portion to prevent heat from being transferred from the current collector to other components.

[15] In some embodiments, the insulating structure may be an insulating tube outside the current collector that supports at least a portion of the current collector, with the excitation coil wound around the outside of the structure.

[16] In some embodiments, the insulating structure may prevent heat leakage from the receiver by placing a heat-insulating ring made of a low thermal conductivity ceramic powder between the insulating structure and the receiver.

[17] In some embodiments, the insulating tube may be formed from a heat-resistant plastic, and the insulating structure may further include a two-layer tube comprising a ferrite layer and an aerogel layer, which is configured to coat the outside of the excitation coil.

[18] In some embodiments, the insulating tube may be made of a heat-resistant plastic, and the insulating structure further includes a two-layer tube consisting of a ferrite layer and a paper layer, which is configured to cover the outer side of the excitation coil.

[19] In some embodiments, the aerogel layer or the paper layer included in the two layers may have a thickness of 0.5 mm or more.

[20] In some embodiments, the ferrite sheet may be wrapped around the outside of the excitation coil so as to come into contact with the excitation coil, thereby preventing magnetic field leakage from the excitation coil.

[21] In some embodiments, a graphite sheet may be wrapped around the outside of the excitation coil to conduct heat away from the excitation coil.

[22] In some embodiments, a laminated material of a ferrite sheet and a graphite sheet may be wrapped around the outside of the excitation coil to prevent magnetic field leakage from the excitation coil and to conduct heat away from the excitation coil.

[23] In some embodiments, the microparticle generating device may further include a pressure sensor in the air flow path communicating with the cavity for detecting a negative pressure caused by a user drawing on a smoking article inserted into the cavity.

[24] In some embodiments, the susceptor temperature obtaining unit may calculate the susceptor temperature in accordance with changes in current and voltage from a current sensor and a voltage sensor that measure changes in current and voltage for heating the susceptor caused by a value of inductance or reactance that changes with a change in the temperature of the susceptor.

[25] In some embodiments of the invention, the susceptor temperature obtaining unit may be a temperature sensor that contacts the outer surface of the susceptor and measures the temperature by detecting a change in resistance caused by a change in the temperature of the susceptor, and the current-carrying wire of the temperature sensor may be electrically connected to the control unit.

[26] In some embodiments, the temperature sensor and the temperature sensor lead wire may be coated with a heat-resistant heat shrink tubing that covers the outer surface of the sensor to contact the outer surface of the sensor.

[27] In some embodiments, the smoking article may contain a liquid cartridge therein.

[28] In some embodiments, the liquid cartridge may include a liquid or gel composition comprising VG glycerin.

[29] In some embodiments, the smoking article may further include tobacco mass before or after the liquid cartridge.

[30] In some embodiments, the smoking article may further include a filter and a tube and is formed by wrapping the filter, tube, and liquid cartridge in a single piece of wrapping paper.

[31] In some embodiments, the smoking article may include a tobacco mass containing glycerin VG.

[32] In some embodiments, the smoking article may further include a filter and a tube and is formed by wrapping the filter, tube and tobacco mass in a single piece of wrapping paper.

[33] The inductively heated microparticle generating device provided by the present invention includes a sensor as part of the device and is therefore capable of easily controlling heat generation from the sensor by directly measuring the temperature of the sensor.

[34] The inductively heated microparticle generating device provided by the present disclosure can heat a magnetic heating element with one portion of an excitation coil spirally wound in a cylindrical shape, and includes an insulating tube between the magnetic heating element and the excitation coil to prevent overheating of the excitation coil and improve the heat generation efficiency of the magnetic heating element.

BRIEF DESCRIPTION OF DRAWINGS

[35] FIG. 1 is a view showing an induction heating device for heating an aerosol-forming substrate according to the prior art.

[36] FIG. 2 is a schematic exploded cross-sectional view showing a preferred example of a smoking article according to the present invention.

[37] FIG. 3 is a schematic enlarged cross-sectional view showing another preferred example of a smoking article disclosed herein.

[38] FIG. 4 is an expanded perspective view of an apparatus for generating microparticles according to a first embodiment of the present invention.

[39] FIG. 5 is a cross-sectional view of a microparticle generating device according to a first embodiment of the present invention.

[40] FIG. 6 is a perspective view of an insulating tube provided in a microparticle generating apparatus according to a first embodiment of the present invention.

[41] FIG. 7 is a view showing a first internal portion provided in the microparticle generating device according to the first embodiment of the present disclosure.

[42] FIG. 8 is a view showing a heating tobacco stick provided in a microparticle generating device according to a first embodiment of the present disclosure.

[43] FIG. 9 is a view showing a second internal portion provided in the microparticle generating device according to the first embodiment of the present disclosure.

[44] FIG. 10 is a cross-sectional view of a microparticle generating device according to a first embodiment of the present invention.

[45] FIG. 11 is a cross-sectional view of a microparticle generating device according to a second embodiment of the present invention.

[46] FIG. 12 is an enlarged perspective view of an apparatus for generating microparticles according to a second embodiment of the present invention.

[47] FIG. 13 is a cross-sectional view showing a portion of a microparticle generating device according to a third second embodiment of the present invention.

[48] FIG. 14 is a cross-sectional view showing a portion of a microparticle generating device according to a fourth second embodiment of the present invention.

[49] FIG. 15 is a cross-sectional view showing a portion of a microparticle generating device according to a fifth embodiment of the present invention.

[50] FIG. 16 is a cross-sectional view showing a portion of a microparticle generating device according to a sixth embodiment of the present invention.

[51] FIG. 17 is an exemplary block diagram of a circuit for induction heating in a microparticle generating device in accordance with the present disclosure.

[52] FIG. 18 is another exemplary block diagram of a circuit for induction heating in a microparticle generating device in accordance with the present disclosure.

DETAILED DESCRIPTION OF IMPLEMENTATION OPTIONS

[53] Certain embodiments will now be illustrated in the drawings and described in detail in the description, although various changes and modifications may be made thereto. The features and advantages of the present invention and the manner of obtaining them will become more apparent from the following description of embodiments of the invention taken in conjunction with the accompanying drawings. The present disclosure, however, may be embodied in various forms and should not be construed as limited to the embodiments set forth herein.

[54] The singular forms used herein are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[55] It should further be understood that the terms "include," "consisting," "including," "including," "having," and/or "having" when used herein indicate the presence of the stated features or components, but do not exclude the presence or addition of one or more other features or components.

[56] In the following embodiments, the terms "upstream" and "downstream" are used to describe the relative position of segments of the smoking article with respect to the direction in which the user draws air through the smoking article. The smoking article includes an upper end (through which air enters) and an opposite lower end (through which air exits). In use, the user may clamp the lower end of the smoking article between the lips. The lower end is located downstream of the upper end. The term "end" may also be described as the "extreme end."

[57] The dimensions of the components in the drawings may be increased or decreased in size for greater clarity and convenience. For example, the dimensions and thicknesses of the components in the drawings are arbitrarily presented for convenience of description, and thus the present disclosure is not necessarily limited to the drawings.

[58] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the present invention can be easily implemented by those skilled in the art. However, the present disclosure can be implemented in various ways without being limited to the described embodiments.

[59] Hereinafter, with reference to the accompanying drawings, a liquid cartridge that can be inserted into a smoking article capable of generating an aerosol by heating and a heated smoking article including such a liquid cartridge, which can be used in a device for generating microparticles according to a preferred embodiment of the present disclosure, will be described. For ease of explanation, the components of the heated smoking article will be described separately together with a description of the liquid cartridge included therein. Here, a heated smoking article is intended to mean a smoking article that is heated by electrical resistance or induction heating, rather than by combustion, to produce an aerosol for inhalation by the user. The smoking article contains a sufficient amount of an aerosol-forming substrate and/or shredded tobacco to make a number of puffs equivalent to the number of puffs of one traditional cigarette. The smoking article no longer generates an aerosol after producing a predetermined amount of aerosol and will be discarded by the user after a single use.

[60] The heated smoking article 50 shown in FIGS. 2 and 3, which can be used in the device for generating microparticles according to the present invention, includes a liquid composition, such as ordinary chopped tobacco and glycerin, as an aerosol-forming substrate, which will be described below. The heated smoking article 50 according to the first preferred embodiment of the present invention has a pack structure consisting of chopped tobacco 58 located at the front end as an aerosol-forming substrate, a cartridge 56 with a liquid composition located immediately behind it as another aerosol-forming substrate, a tube 54 located immediately behind it, which provides a passage for the aerosol, and a filter 52 functioning as a mouthpiece. The relative positions of the cartridge 56 with a liquid composition and the chopped tobacco or tobacco mass 58 can be reversed. In another embodiment, the shredded tobacco or tobacco mass 58 may be omitted, as shown in FIG. 3, or the cartridge 56 with the liquid composition may be omitted, as in the currently available heated smoking article 50.

[61] The liquid cartridge 56 according to the present invention comprises: a liquid or gel composition; a liquid or gel absorbent impregnated with the liquid or gel composition; and a wrapping paper that is wrapped around the side surface of the liquid or gel absorbent in a cylindrical shape with a size of 7 to 20 mm in length and 5 to 8 mm in diameter, a diameter at which the liquid or gel absorbent has a sufficient absorption rate to absorb 70 to 120 mg of the liquid composition and retain it in the liquid or gel cartridge. The cylindrical shape with a length of 7 to 20 mm and a diameter of 5 to 8 mm meets the technical requirements for conventional cigarettes or heated smoking articles used at present. When a cartridge 56 with liquid of such dimensions is inserted into a heated smoking article and wrapped in a separate piece of wrapping paper 60, the user will not see a difference between regular cigarettes and the heated smoking article.

[62] The present invention is characterized in that the liquid absorbent of the liquid cartridge 56 with the specified dimensions absorbs from 70 to 120 mg of the liquid or gel composition, and this numerical range indicates the amount of the liquid composition, which also provides an aerosol obtained from the liquid composition when the user inhales the aerosol of shredded tobacco supplied in one cigarette stick for a heated smoking article. If the amount of the liquid or gel composition absorbed by the liquid absorbent is less than the above-specified lower limit (70 mg), the amount of the aerosol obtained from the liquid composition when the user inhales the aerosol obtained from shredded tobacco in the heated smoking article will be insufficient. Thus, the amount of the liquid composition absorbed by the liquid cartridge should be equal to or exceed the above-specified lower limit (70 mg). If the amount of the liquid or gel composition absorbed by the liquid absorbent exceeds the above-mentioned upper limit (120 mg), it would be difficult to retain the liquid composition absorbed by the liquid absorbent in the liquid cartridge with the above-mentioned dimensions, causing the liquid composition to flow out of the liquid cartridge. Therefore, the amount of the liquid or gel composition absorbed by the liquid cartridge 56 should be equal to or less than the above-mentioned upper limit (120 mg). A desirable range is from 80 to 110 mg, and a more desirable range is from 90 to 105 mg.

[63] Another characteristic of the present invention is that the liquid absorbent in the liquid cartridge 56 with the above dimensions has a sufficient absorption rate to maintain the liquid composition having the above range in the liquid cartridge. That is, the liquid composition remains absorbed in the liquid absorbent in the liquid cartridge without leaking out of the liquid cartridge. Here, absorption means that the absorbent is impregnated with the liquid composition, which does not leak out. As described below, the filter, the pipe, the liquid cartridge and the tobacco body are wrapped in wrapping paper to form a heated smoking article, wherein the liquid cartridge is brought into direct contact with the tobacco body, the pipe or the filter without a separate element upstream or downstream, and the liquid composition absorbed by the liquid absorbent in the liquid cartridge is retained in the liquid absorbent 56a, but does not leak out to the tobacco body, the pipe or the filter. For this purpose, the amount of the liquid composition absorbed by the liquid absorbent is preferably 0.13 to 0.32 mg/ ^mm3 per unit volume of the liquid absorbent. This numerical limitation is set for the same reason as the numerical limitation on the amount of the liquid composition absorbed by the liquid absorbent of the present invention. That is, if the amount of the liquid composition absorbed by the absorbent is insufficient, i.e. less than the aforementioned lower limit (0.13 mg/ ^mm3 ), the amount of aerosol obtained from the liquid composition when the user inhales the aerosol of shredded tobacco in the heated smoking article will be insufficient. Thus, the amount of the liquid composition absorbed by the liquid cartridge should be equal to or greater than the aforementioned lower limit (0.13 mg/mm3). If the amount of the liquid composition absorbed by the liquid absorbent exceeds the above-mentioned upper limit (0.32 mg/mm3), it would be difficult to retain the liquid composition absorbed by the liquid absorbent in the liquid cartridge with the above-mentioned dimensions, resulting in the liquid composition leaking out of the liquid cartridge.

[64] The liquid composition comprises glycerin VG and optionally comprises glycerin PG, water and flavorings. The liquid composition comprises 70 to 100 wt. % of glycerin VG, 0 to 20 wt. % of glycerin PG and 0 to 10 wt. % of water and further comprises flavorings added in an amount of 10% or less of the total weight of the resulting liquid composition. According to a preferred embodiment, the present disclosure uses a liquid composition consisting of 100 wt. % of glycerin VG. According to another preferred embodiment, the present disclosure uses a liquid composition consisting of 80 wt. % of glycerin VG and 20 wt. % of glycerin PG. According to yet another preferred embodiment, the present disclosure uses a liquid composition consisting of 75 wt. % of glycerin VG, 20 wt. % glycerol PG and 5 wt. % water. According to another preferred embodiment, the present disclosure further comprises flavoring agents added in an amount that is 10% or less of the total weight of the resulting liquid composition. For example, flavoring agents may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, cinnamon, cumin, cognac, jasmine, chamomile, menthol, ylang-ylang, sage, mint, ginger, coriander or coffee, etc. In addition, the liquid composition may or may not contain nicotine.

[65] According to a preferred embodiment, the liquid absorbent of the present invention is produced by crushing or rolling a strip made of melamine-based polyurethane foam with a thickness of 2 to 3 mm into a cylindrical shape. According to another preferred embodiment, the liquid absorbent of the present invention is obtained by giving a cylindrical shape to a foamed melamine-based resin. More preferably, the liquid absorbent made of melamine-based polyurethane foam has a mass of 0.01 to 0.013 mg/mm ³ per unit volume. According to the test results of a heated smoking article comprising a liquid cartridge containing a liquid absorbent impregnated with 100 mg of a liquid composition, the liquid composition remained absorbed in the liquid absorbent without leaking during the test, and a sufficient amount of aerosol obtained from the liquid composition was observed.

[66] According to another preferred embodiment, the liquid absorbent of the present invention is produced by crushing, bending or rolling cellulose or a fabric containing cellulose into a cylindrical shape or by processing it into a cylindrical shape, and more preferably, the liquid absorbent made of cellulose or a fabric containing cellulose has a mass of 0.25 to 0.4 mg/mm ³ per unit volume. According to the test results of a heated smoking article comprising a liquid cartridge containing a liquid absorbent impregnated with 100 mg of a liquid composition, the liquid composition remained absorbed in the liquid absorbent without leaking during the test, and a sufficient amount of aerosol produced from the liquid composition was observed.

[67] According to another preferred embodiment, the liquid absorbent of the present invention is produced by crushing or rolling a cotton woven or non-woven fabric into a cylindrical shape or by giving it a cylindrical shape, and more preferably, the liquid absorbent made of the cotton woven or non-woven fabric has a mass of 0.2 to 0.35 mg/mm ³ per unit volume. According to the test results of a heated smoking article including a liquid cartridge containing a liquid absorbent impregnated with 100 mg of a liquid composition, the liquid composition remained absorbed in the liquid absorbent without leaking during the test, and a sufficient amount of aerosol generated from the liquid composition was observed.

[68] According to another preferred embodiment, the liquid absorbent of the present invention is produced by crumpling or rolling a woven or non-woven fabric of bamboo fiber into a cylindrical shape or by giving it a cylindrical shape, and more preferably, the liquid absorbent is made of a woven or non-woven fabric of bamboo fiber, the density of the fabric is from 0.15 to 0.25 mg/mm3 per unit volume. According to the test results of a heated smoking article including a liquid cartridge containing a liquid absorbent impregnated with 100 mg of a liquid composition, the liquid composition remained absorbed in the liquid absorbent without leaking during the test, and a sufficient amount of aerosol generated from the liquid composition was observed.

[69] The smoking article applicable to the microparticle generating device according to the present invention also includes: a gel-forming aerosol substrate in the form of a cartridge with a gel-forming aerosol substrate that exists in the form of a gel or a solid form and evaporates into an aerosol in a temperature range of from 150 to 300 °C and that contains glycerin PG, glycerin VG, water and gelatin and optionally contains glycerin PG; a gel receptor that holds the gel-forming aerosol substrate; and a wrapping paper that is wrapped around the side surface of the gel receptor in a cylindrical shape with a length of from 7 to 20 mm and a diameter of from 5 to 8 mm. The cylindrical shape with a length of from 7 to 20 mm and a diameter of from 5 to 8 mm meets the technical requirements for conventional cigarettes or heated smoking articles currently used. When a cartridge with a gel-forming aerosol substrate of this size is inserted into a heated smoking product and wrapped in a separate sheet of wrapping paper, the user will not notice the difference between regular cigarettes and the heated smoking product.

[70] Here, the aerosol gel-forming substrate comprises a liquid composition consisting of 80-100 wt.% glycerin VG and 0-20 wt.% glycerin PG, and contains from 1 to 6 g of gelatin per 100 ml of a mixture consisting of 60-80% of the liquid composition and 20-40% water, and may optionally contain flavorings added in an amount of 10% or less of the total weight of the liquid composition. Preferably, the liquid composition is included in the gel receptor in an amount of 70 to 120 mg. Alternatively, the liquid composition can be included in the gel receptor in an amount of 0.13 to 0.32 mg/mm ³ per unit volume of the gel receptor.

[71] According to a preferred embodiment, the wrapping paper 60 can be made by attaching aluminum foil to paper and can be wrapped in a cylindrical shape such that the aluminum foil comes into contact with the liquid absorbent. As can be seen from the structure of the liquid cartridge shown in FIGS. 2 and 3, the liquid absorbent is wrapped in the wrapping paper. In this case, the wrapping paper can be made in the form of paper with aluminum foil attached thereto, and it is desirable that the wrapping paper is wrapped in a cylindrical shape such that the aluminum foil comes into contact with the liquid absorbent. Therefore, it is preferable to use the wrapping paper for wrapping the liquid cartridge 56 (which is formed by attaching aluminum foil to paper), and the wrapping paper 60 shown in FIG. is used to form the smoking article 58. 2 and 3, should successively arrange and wrap the filter 52, the tube 54, the liquid cartridge 56 and/or the tobacco body 58 (the positions of the last two may be changed, or one of them may be omitted, as indicated above) (the type of wrapping paper will be described later).

[72] As shown in FIGS. 2 and 3, a heated smoking article 50 that may be used in the microparticle generating device according to the present disclosure may include a tube 54 for providing an aerosol passage into which PLA may be inserted to reduce the temperature of the aerosol to prevent burns to the user when inhaling the aerosol.

[73] As shown in FIGS. 2 and 3, the filter 52, which functions as a mouthpiece, allows the aerosol to pass through but does not allow the liquid to enter. The filter may be made of cellulose in the form of a cylinder or a tube. At the same time, the filter may contain a flavoring component to enhance the user's satisfaction. Examples of the flavoring component may include licorice, sucrose, fructose syrup, iso-sweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, caraway, cognac, jasmine, chamomile, menthol, ylang-ylang, sage, mint, ginger, coriander or coffee, etc.

[74] In some cases, the liquid composition may contain nicotine without a tobacco mass 58 consisting of chopped tobacco, and the heated smoking article 50 may be made by sequentially placing a tube and a filter into a cartridge with liquid and wrapping them in wrapping paper.

[75] The heated smoking article 50 is typically wrapped in several layers of wrapping paper 60, such as a first wrapping paper that covers the portion where the liquid cartridge is located, a second wrapping paper located below or in front of the first wrapping paper that wraps around the liquid cartridge and the tobacco mass of chopped tobacco as a whole, a third wrapping paper lying on top of the second wrapping paper that also wraps around the tube, and a fourth wrapping paper lying on top of the third wrapping paper that completely covers the heated smoking article. The heated smoking article may be obtained by a series of wrapping steps. In some cases, the process of forming the liquid cartridge may be carried out separately or in a continuous line.

[76] Alternatively, to reduce production time and lower production costs, different materials or thicknesses of wrapping paper can be added to the inside of the outermost wrapping paper that completely envelops the heated smoking article so that they are all wrapped in one wrapper.

[77] As shown in FIGS. 2 and 3, in a liquid cartridge applicable to a device for generating microparticles according to one embodiment of the present invention, a liquid absorbent having a liquid composition absorbed therein is wrapped in wrapping paper serving as a body. In addition, a tube and a filter are arranged in series at the lower end of the liquid cartridge. The filter and the tube are wrapped in wrapping paper together with the liquid cartridge. The liquid composition in the liquid cartridge remains absorbed by the liquid absorbent in the liquid cartridge, does not leak out of the liquid cartridge, and forms an aerosol by evaporating upon heating. Preferably, the wrapping paper is made of a material that does not deform when heated to a high temperature or when in contact with a liquid, or that does not emit harmful components. Alternatively, the wrapping paper may be made from thin metallic film or thin metallic foil, or, as described above, may be made by adding thin metallic film or thin metallic foil to the wrapping paper.

[78] The filter 52 provided after the liquid cartridge 56 may have a hollow portion for forming an air flow, but a filter without a hollow portion may also be used. The filter may consist of at least one segment and may include, for example, at least one tubular filter, a cooling structure and a filter with a recess. The tubular filter has an internal hollow portion. The tubular filter and the filter with a recess may be made of cellulose acetate, and the tube serving as a cooling structure may be made of pure polylactic acid (PLA) or a combination of polylactic acid and another degradable polymer. More specifically, the filter may be made of acetate, paper, polypropylene, etc., and the wrapping paper for the filter may be classified as plain paper, porous paper, punched paper, non-wrapped acetate (NWA), etc. In addition, the filter type can be classified as a monofilter consisting of one segment, or a composite (double, triple, etc.) filter consisting of several segments. The filter can be made of acetate tow, plasticizer, activated carbon, X-ray DNA and wrapping paper. Acetate tow refers to a collection of continuous filaments of cellulose acetate, which plays an important role in determining the resistance to drawing, which is the most important characteristic of the filter. The properties of acetate tow are determined by its density. The plasticizer makes the cellulose acetate fibers soft and flexible by forming bonds at the contact points between the fibers and making the fiber bundle more rigid. Triacetin is used as a plasticizer for cigarette filters. Activated carbon, which is a type of absorbent, contains carbon as the main component and can be classified according to particle size and state. The raw materials used to produce activated carbon include plant materials such as wood, sawdust, and fruit pits (coconut husk, bamboo, peach seeds, etc.). X-DNA refers to functional particles that are extracted from seaweed and then condensed and processed. Compared with activated carbon, which is mainly used for cigarette filters, X-DNA does not affect the taste of cigarettes and has a strong anticarcinogenic effect.

[79] The wrapping paper 60 serves to maintain the shape of the filter flakes during the manufacture of the filter. When manufacturing the wrapping paper, it is required that it meet physical properties such as porosity, tensile strength, stretch, thickness, adhesive adhesion, etc. For example, the liquid cartridge 56 may have a length of 14.0 mm, the filter 52 or the tube 54 may have a length of 2.5 mm, and the tobacco body 58 containing the chopped tobacco may have a length of 9.0 mm. The preferred dimensions for them may change when the liquid cartridge 56 or the tobacco body 58 are omitted, as indicated above.

[80] FIG. 4 is an expanded perspective view of a device for generating microparticles according to a first embodiment of the present invention. FIG. 5 is a cross-sectional view of a device for generating microparticles according to a first embodiment of the present invention.

[81] A microparticle generating device according to a first embodiment of the present invention is a grippable microparticle generating device of portable size, which includes an aerosol-forming substrate inside, has a cavity 100 into which a smoking article 50 wrapped in wrapping paper 60 on the outside can be inserted, and generates an aerosol by heating the aerosol-forming substrate of the smoking article 50 inserted into the cavity. Such a microparticle generating device has electrical components located in lower and upper housings, which are not shown in the drawings. In the space defined by the lower and upper housings, a battery 210, which serves as a DC power source in the present disclosure, and a control board 220, which is a control unit in the present disclosure, are accommodated in the lower portion, and electrical components actually used for generating heat are accommodated in the upper portion. A protective cover is attached to the upper housing, covering the upper housing. The present invention relates to a device for generating microparticles of a portable size that can be grasped. The rechargeable battery 210 can be recharged using a charging means such as, for example, a USB cable, and the user can inhale the aerosol generated in the smoking article 50 by inserting the smoking article 50 into the cavity 100 of the device for generating charged microparticles and heating the receiver by induction heating, as will be described below later. In this case, the battery 210 functions as a DC power source, and the alternating current is supplied to the excitation coil 300 through the control unit 220. The device for generating microparticles according to the present invention has a portable size, which allows the user to easily carry it with him.

[82] The electrical components used for generating heat are induction heating parts and include an excitation coil 300 wound multiple times in a cylindrical shape and current collectors (magnetic heating element) 400 and 800 in which induction heating occurs due to eddy current losses when interacting with the excitation coil 300. Preferably, the current collector is a metal heat pipe 400 provided inside the excitation coil 300 so as to be closed by the excitation coil 300 inside the device, which is made of a hollow cylindrical thin sheet forming a cavity 100 into which the smoking article 50 can be inserted, and is heated to a temperature of 400°C or lower by induction heating caused by eddy current losses as a result of interaction with the excitation coil 300. Although the current collector can be heated to a temperature of 1000°C or higher depending on the magnitude of the alternating current supplied to the excitation coil 300, the present disclosure is characterized in that the current collector is heated to a temperature of 400°C or lower. The sensor is heated to a temperature of 100 to 400°C depending on the value of the alternating current supplied to the excitation coil 300, to heat the aerosol-forming substrate provided inside the smoking article 50 inserted into the cavity 100, thereby generating an aerosol. According to a preferred embodiment, the target temperature may be in the range of 200 to 350°C and, more preferably, between 250 and 320°C (for example, the target temperature may be set to 280°C). In some cases, the target temperature may be in the range of 150 to 250°C (for example, the target temperature may be set to 180°C) and may vary depending on whether the aerosol is formed from gel or liquid glycerin, tobacco mass or tobacco mass with glycerin absorbed therein. In any of these cases, the aerosol generated in the smoking article 50 is inhaled into the user's mouth through the tube 54 and the filter 52. Thus, if the temperature of the generated aerosol is too high, the user may feel discomfort or get burned, even if the aerosol is cooled when inhaled. In addition, too much aerosol may be generated, which will make it difficult to repeatedly draw. Taking this into account, a target sensor temperature should be set in advance. For these reasons, the upper limit specified above is set for the target sensor temperature.

[83] According to a preferred embodiment, the temperature at which the generated aerosol exits through the tube 54 and the filter 52 can be measured as the temperature at the end of the neck. In order not to cause discomfort to the user, the temperature of the aerosol should be below 50°C, preferably 45°C or lower. A desirable temperature range for the aerosol at the inlet end is from 25 to 45°C, and a more desirable temperature range for the aerosol at the inlet end is from 30 to 40°C.

[84] One or more receivers may be provided, and in the first embodiment of the present invention, the heat pipe 400 and the heating tobacco stick 800 provided in the body serve as receivers. The heat pipe 400 serves as a receiver on the outside of the smoking article 50 having an approximately cylindrical shape. The inner surface of the heat pipe 400 comes into contact with at least a part of the outer surface of the wrapping paper 60 of the smoking article 50 inserted into the cavity 100, and the sensor heated inductively heats the aerosol-forming substrate on the inner side of the wrapping paper 60 by heat transfer. The heating tobacco stick 800 is inserted into the smoking article 50 in such a way that the aerosol-forming substrate is heated inside the smoking article 50. In this case, both the heat pipe 400 and the heating tobacco stick 800 are made thin, and the heating rod 800 is a thin hollow rod with a closed upper end forming a tip.

[85] Only the heat pipe 400 provided in the first embodiment may be provided, or only the heating tobacco stick 800 may be provided. Let us assume that only the heat pipe 400 (corresponding to the second embodiment, which will be described later) is provided. In this case, as described above, the heat pipe 400 serves as a receptacle on the outside of the smoking article 50 having an approximately cylindrical shape, and the inner surface of the heat pipe 400 comes into contact with at least a part of the outer surface of the wrapping paper 60 of the smoking article 50 inserted into the cavity 100, and the receptor member, inductively heated, heats the aerosol-forming substrate on the inner side of the wrapping paper 60 by heat transfer. Thus, the heat pipe 400 with inductive heating generates an aerosol by heating an aerosol-forming substrate, such as shredded tobacco or glycerin in a tobacco body 58 inside the smoking article 50, or an aerosol-forming substrate, such as glycerin in a liquid cartridge 56, without direct contact with the tobacco body 58 or the liquid cartridge 56 inside the smoking article 50. Therefore, there is a low probability that a residue or the like obtained from the smoking article 50 will remain in the cavity 100 when the smoking article 50 is removed from the cavity 50 after a sufficient amount of aerosol has been generated from the aerosol-forming substrate.

[86] The cavity 100 formed by the heat pipe 400 is a space into which the smoking article 50 can be inserted. After the smoking article 50 is inserted into the cavity 100, it is heated by an inductively heated receiver. After a predetermined amount of aerosol is generated, or in other words, when the user no longer wants to inhale the aerosol from the smoking article 50, the used smoking article 50 is removed from the cavity 100 and discarded. The size of the cavity 100 must be large enough to allow the smoking article 50 to be inserted therein, but if the distance from the inner surface of the heat pipe 400 forming the cavity 100 to the outer surface of the smoking article 50 is large, the amount of heat transfer from the inductively heated heat pipe 400 supplied to the aerosol-forming substrate inside the smoking article 50 may be insufficient. Therefore, in the present description, it is preferable that the inner surface of the heat pipe 400 contacts at least a part of the outer surface of the wrapping paper 60 of the smoking article 50 inserted into the cavity 100.

[87] The present invention is characterized by arranging a temperature sensor 420 on the outer surface of the heat pipe 400, which functions as a sensing element and forms a cavity 100 in the center. The temperature sensor 420 functions as a susceptor temperature acquisition unit for acquiring the susceptor temperature, and is a temperature sensor 420 that contacts the outer surface of the heat pipe 400 and measures the temperature by detecting a change in resistance resulting from a change in the temperature of the susceptor. A lead wire 440 of the temperature sensor is electrically connected to a control board 220 serving as a control unit. The temperature sensor 420 and the lead wire 440 of the temperature sensor are covered with a heat-resistant heat-shrinkable tube covering the outer surface of the receiving heat pipe 400 so as to come into contact with the outer surface of the heat pipe 400, which is the receiving one. In this way, the temperature sensor 420 and the temperature sensor lead wire 440 are covered with the heat pipe 400 by means of a heat shrinkable tube, and this provides a strong surface contact between the temperature sensor 420 and the heat pipe 400 and eliminates the difficulties with obtaining the temperature sensor 420 readings of the resistance changes that occur as a result of changes in the temperature of the heat pipe 400. Since the present invention is characterized in that the sensor is heated to a temperature of 400°C or lower by induction heating, the heat-resistant heat shrinkable tube does not deteriorate in this temperature range and provides sufficient elasticity, thereby fixing the temperature sensor 420 and the temperature sensor lead wire 440 in place. Fixing the temperature sensor 420 on the outer surface of the heat pipe 400 in this way makes it possible to improve the efficiency of the work process in providing contact of the temperature sensor 420 with the surface of the susceptor, while there is no need for separate equipment or processing for installing the temperature sensor 420 in place. In the above-described prior art, the temperature of the susceptor cannot be measured directly because the susceptor is located inside the smoking article, whereas in the present disclosure, the temperature of the susceptor can be calculated by directly measuring the temperature of the susceptor with the temperature sensor 420 or by measuring the current or voltage supplied to the excitation coil, as will be described below. This gives the advantage of controlling the alternating current supplied to the excitation coil depending on the temperature of the current collector when the current collector is inductively heated.

[88] The excitation coil 300 is a coil winding body around which the coil is wound repeatedly and supplies an alternating current to the current collector, causing induction heating in the current collector due to eddy current losses. When the high-temperature heat generated from the current collector is transferred to the excitation coil 300, the resistance of the excitation coil 300 itself increases. Thus, as will be described later, a barrier is required between the current collector and the excitation coil to prevent the heat from being transferred from the current collector to the excitation coil 300. On the other hand, it is necessary to reduce the temperature of the excitation coil 300 by dissipating the heat transferred to the excitation coil 300 from the current collector. For this purpose, it is preferable that the graphite sheet 360 is wrapped around the outside of the excitation coil 300. The graphite sheet 360 serves to dissipate heat from the excitation coil 300. In addition, wrapping the ferrite sheet 340 around the outside of the excitation coil 300 can prevent the magnetic field from leaking from the excitation coil 300, thereby creating a magnetic line from the excitation coil 300 concentrated on the receiver inside the excitation coil 300. As described above, one or more graphite sheets or ferrite sheets can be wrapped around the outside of the excitation coil 300 to achieve the above-mentioned effect. More preferably, the graphite sheet 360 and the ferrite sheet 340 can be laminated together so that the laminated sheet is wrapped around the outside of the excitation coil 300, as shown in the drawings.

[89] Between the excitation coil 300 and the current receiver, in particular the heat pipe 400, an insulating part is provided that prevents heat from being transferred from the inductively heated receiver to the excitation coil 300. In one preferred example, the insulating part may be an air layer 530 (see FIGS. 13 and 14), which is provided separately, or may be formed as an insulating pipe 500, as shown in FIGS. 4 to 6. In another embodiment (see FIGS. 15 and 16), the insulating part further includes a two-layer pipe that is provided to cover the outside of the excitation coil 300 together with the insulating pipe 500. This will be described again later.

[90] FIG. 6 is a perspective view of an insulating pipe included in the induction heating microparticle generating apparatus according to the first embodiment of the present invention. The insulating pipe 500 has a smooth outer circumference and serves to support the winding of the excitation coil 300. An axial groove 510 is formed along the entire inner periphery of the insulating pipe 500 in the circumferential direction, and also forms an air layer for heat insulation and minimizes the contact area between the heat pipe 400 and the inner surface of the insulating pipe 500. Although the inner portion of the insulating pipe 500 provided in the first embodiment may be formed by the axial groove 510, the groove may have any shape that minimizes the contact surface, including a wedge shape, a spiral shape, a ring shape, and a mesh shape. By minimizing the contact surface, conductive heat transfer from the inductively heated receiver to the insulating tube can be minimized.

[91] By placing the insulating pipe 500 between the excitation coil 300 and the current collector, it is possible to prevent the induced heat generated by the current collector from being transmitted to the excitation coil 300. When the high-temperature heat generated by the current collector is transmitted to the excitation coil 300, the resistance of the excitation coil 300 itself increases, and as a result, the strength of the magnetic field induced by the excitation coil 300 decreases, thereby reducing the amount of induced heat generated by the current collector. Therefore, by placing an insulating part such as the insulating pipe 500 or an air layer between the excitation coil 300 and the current collector, the amount of heat generated by the current collector can be improved. In addition, due to the low energy loss, it is easy to control the heating temperature of the sensor.

[92] The insulating pipe 500 and other insulating structures that can be seen in various embodiments can be made of one or more materials selected, for example, from heat-resistant plastic, aerogel, ferrite or paper. In the case of an insulating structure made of heat-resistant plastic, its insulation can be further enhanced by using plastic materials having a foamed or cellular structure. Heat-resistant plastic, aerogel and paper have good insulating properties and are therefore desirable as materials for an insulating part, for example, an insulating pipe 500, which is provided between the heat pipe 400 and the excitation coil 300 and prevents heat from being transferred from the heat pipe 400 to the excitation coil 300.

[93] The insulating structure may be provided between the heat pipe 400 and the excitation coil 300 or may be formed so as to cover the outer side of the excitation coil 300. Naturally, the insulating structure may be provided between the heat pipe 400 and the excitation coil 300 and at the same time may cover the outer side of the excitation coil 300 (see FIGS. 15 and 16). In particular, in the above-mentioned insulating structure covering the outer side of the excitation coil 300, both a ferrite material and an insulating material may be used, which makes it possible to prevent the magnetic field from leaking from the excitation coil 300 and at the same time retain the heat generated by the suspender, and thereby prevent discomfort that a user may experience when gripping the microparticle generating device.

[94] The heat pipe 400 and the heating tobacco stick 800 are made of a magnetizable metal material by means of the excitation coil 300. One preferred example of the present invention is stainless steel. Stainless steel is available at a relatively low price and has excellent workability, so it can be easily processed into a thin cylinder and has excellent magnetization properties, which makes it suitable for use as a current collector and heat generation. A first inner part 600 is provided for supporting the lower end of the heat pipe 400 and fixing the heat rod 800, and a second inner part 700 is attached to the lower part of the first inner part 500 for fixing the heating tobacco stick 800 together with the first inner part 600. The first inner part 600 and the second inner part 700 can be made of heat-resistant plastic and can withstand the heat generated by the heat pipe 500 and the heating tobacco stick 800. For example, engineering plastics such as PEEK can form such structures as the first inner part 600 and the second inner part 700 by injection molding.

[95] An insulating film using a filler having a heat-insulating and shielding function may be attached to the outer wall of an insulating pipe 500 used for heat insulation to increase the heat-insulating effect of the insulating pipe 500. Ceramic powders with low thermal conductivity such as zirconium dioxide and ceramic powders such as porous silica gel, porous aluminum oxide and aerogel may be used as the insulating filler.

[96] Alternatively, the insulation effect of the insulator can be increased by applying a heat-insulating coating using a filler having a heat-insulating and shielding function to the outer wall of the insulating pipe 500 used for heat insulation. As the insulating filler, ceramic powders with low thermal conductivity such as zirconium dioxide and ceramic powders such as porous silica gel, porous aluminum oxide and aerogel can be used.

[97] As another example, the insulating tube can be replaced by a hollow tube instead of having a groove on the inside. By using a hollow tube, the heat generated by the receiver can be limited to the aerosol formation area, thereby increasing the efficiency. It is most preferable that the hollow tube can have an air gap inside. Otherwise, it can be filled with a porous insulating material such as aerosol powder or zeolite. In addition, even a hollow structure without filling can provide a significant insulating effect of the air layer.

[98] FIG. 7 is a view showing a first inner portion included in the induction-heated microparticle generation device according to the first embodiment of the present disclosure. Referring to FIGS. 4, 5 and 7, the first inner portion includes an annular groove 610 at an upper portion, and a lower end portion of the heat pipe 400 is inserted into the annular groove 610 and supported thereon. In this case, for insulating the heat pipe 400, a plurality of ribs 612 are formed in the annular groove 610, which are located at a predetermined distance from the lower surface of the annular groove 610. That is, an air layer is formed between the lower surface of the annular groove 610 and the lower surface of the heat pipe 400. In addition, a through hole 614 is provided passing from the side of the annular groove 610, through which air introduced along the air flow path, which will be described later, enters and exits. This air flow channel forms an air flow channel that communicates with the cavity 100 formed by the heat pipe 400. A pressure sensor (not shown) for detecting the negative pressure caused by the user's puff on the smoking article 50 inserted into the cavity 100 is provided in a corresponding position on the air flow path. The pressure sensor detects the negative pressure caused by the user's puff on the smoking article 50 inserted into the cavity 100 and can be preferably used to count the number of puffs in the control unit that will be described later, more preferably to calculate the total number of puffs. In other embodiments, as well as in this embodiment, the pressure sensor can be installed in a corresponding position on the air flow path communicating with the cavity 100, for detecting the negative pressure caused by the user's puff on the smoking article 50 inserted into the cavity 100.

[99] In addition, in the center of the lower surface of the annular groove 610, an opening 616 is formed through which the upper portion of the heating tobacco stick 800 penetrates, and a part of the upper portion of the heating tobacco stick 800 is located in the heat pipe 400. In addition, on the outer side of the first inner portion 600, a guide portion 620 is provided for guiding the lead wire of the excitation coil 300. The lead wire 320 of the excitation coil 300 can be pulled out through the guide portion 620 to form a point of electrical contact with the control board 220. In addition, a fastening part 630 may be provided for fastening the first inner portion 600 to a bracket for fastening the battery 210 and the control board 220 or the like. In the first embodiment of the present invention, the first inner portion 600 and the bracket are screwed, and accordingly, the fastening part 630 is a screw hole. On the other hand, the receiving portion 640 (see Fig. 5) is provided in the lower portion of the first inner portion 600, where a part of the heating tobacco stick 800 is located and where the second inner portion 700 is inserted and fixed for fixing the heating tobacco stick 800. Optionally, when the heating tobacco stick 800 is not provided, the second inner portion 700 is not required. In this case, as in the second embodiment, which will be described later, the central opening 616 cannot be formed. Alternatively, the space in the receiving portion 640 for accommodating the central opening 616 and the second inner portion 700 can be used as a place for the passage of an air flow and a place for installing a pressure sensor. Of course, in any case, it is natural that the pressure sensor must be installed on the air flow path communicating with the smoking article 50 inserted into the cavity 100.

[100] FIG. 8 is a view showing a heating tobacco stick included in the induction heating microparticle generating apparatus according to the first embodiment of the present disclosure. In FIG. 4, 5 and 8 show that the heating tobacco stick 800 includes an upper rod 810 located in the heat pipe 400 through the first inner part 600, a flange part 820 that determines the position of the heating stick 800 so that the heating tobacco stick 800 penetrates the first inner part 600 by a predetermined length and is located inside the heat pipe 400, and helps to fix the heating tobacco stick 800, and a lower rod 830 protruding downward from the flange part 820. In this case, the heating tobacco stick 800 is a hollow rod, and the upper rod 810 has a closed upper end forming a tip. An air layer is formed in the center of the heating tobacco stick 800, which provides an insulation effect and is an advantage in that induction heating can occur easily compared with a non-hollow type. As shown in the drawings, the heating tobacco stick 800 can be made in the form of a rod, and it is assumed that the rod shown in FIG. 8 has a filler inside, it can be made of a plate-like material having a shape as shown in the cross-section of its center. Alternatively, the heating tobacco stick 800 can be made in such a way that this plate-like material has the shape of a cross. In any case, the heating tobacco stick 800 is made by simply processing a magnetizable metal material, preferably a thin sheet of stainless steel. Since no other component (for example, a heater pattern) is added to the heating tobacco stick 800 to be processed, it will be sufficient to give the heating tobacco stick 800 the desired shape and attach it to the structure for fixing it. As described in other parts, the heating tobacco stick 800 has the advantage of heating by induction heating in direct contact with the aerosol-forming substrate in the smoking article 50 when it is inserted into the smoking article 50. That is, the heating tobacco stick 800 provides heat transfer in direct contact inside the smoking article. However, once the smoking article 50 is removed from the cavity 100 after use, it is very likely that the residues of the aerosol-forming substrate in the smoking article 50 will remain in the cavity 100, resulting in the need for cleaning. As a result, the need to use the heating tobacco stick 800 will increase until the disadvantages can be minimized while maintaining the advantages. This may include preventing residues from the smoking article 50 from entering the cavity 100 when it is removed, while allowing the heating tobacco stick 800 to be easily inserted into the smoking article 50. By shaping the heating tobacco stick 800 so that it can be inserted and removed in this manner, the above-mentioned advantages can be maintained while minimizing the disadvantages.

[101] FIG. 9 is a view showing a second inner portion included in the induction-heated microparticle generating apparatus according to the first embodiment of the present disclosure. In FIGS. 4-9, the second inner portion 700 is inserted into the receiving portion 640 (see FIG. 5) formed at the lower portion of the first inner portion 600 and fixed therein, and the flange portion 820 and the lower rod 830 of the heating tobacco stick 800 are engaged with each other, thereby fixing the heating tobacco stick 800 in place. The upper portion 710 of the second inner portion 700 is formed such that the flange portion 820 of the heating tobacco stick 800 is engaged therewith. In addition, in the center of the upper part 710, an insertion groove 720 is provided, into which the lower rod 830 of the heating tobacco stick 800 is inserted. In addition, under the insertion groove 720, a fastening part 730 is provided for fastening to the first inner part 600. In the first embodiment, the fastening part 730 is a fastening projection with a screw groove, since the first inner part 600 and the second inner part 700 are screwed to each other.

[102] FIG. 10 is a cross-sectional view of the induction-heated micro-particle generating device according to the first embodiment of the present invention. In the induction-heated micro-particle generating device according to the first embodiment of the present invention, the outside air introduced through the opening formed in the cap body (not shown) passes through the air flow opening 140 formed in the upper body and enters the heat pipe 400 through the through hole 614 (see FIG. 7) of the first inner portion 600 and the air flow passage space 120. Then, the user can inhale the micro-particles or aerosol generated by heating the smoking article 50 inserted into the heat pipe 400.

[103] In the first embodiment of the invention, both the heat pipe 400 and the heating tobacco stick 800 were used as a susceptor, whereas in another embodiment of the invention, the heat pipe 400 may be made of a non-magnetizable material and used as a tube that serves only to hold the smoking article 50 without generating heat, and only the heating tobacco stick 800 may be used as a susceptor.

[104] FIG. 11 is a cross-sectional view of the inductively heated microparticle generating device according to the second embodiment of the present invention. FIG. 12 is an enlarged perspective view of the inductively heated microparticle generating device according to the second embodiment of the present invention. The inductively heated microparticle generating device according to the second embodiment of the present invention does not include a heating rod as a receptacle, but only includes a heat pipe 400 into which the smoking article 50 is inserted. Accordingly, only a first inner portion 600 for supporting the heat pipe 400 may be provided, and the second inner portion is not included, unlike the first embodiment. The first inner portion 600a provided in the second embodiment does not have a through hole on the lower surface since the heat rod does not need to pass through it. As in the rest of the first embodiment, a plurality of fins are formed so as to separate the lower end of the heat pipe 400 from each other, and a through hole is provided on the side through which air can enter.

[105] The components of the smoking article 50 are enlarged so that they can be seen. The aerosol-forming substrates 56 and 58 of the smoking article 50 must be placed in the cavity 100 in the heat pipe 400, which functions as an absorber. Accordingly, the thermal aerosol-forming substrates 56 and 58 are heated by heating the heat pipe, thereby generating an aerosol inside the smoking article 50.

[106] As described above, the second embodiment includes all the components of the first embodiment, except for the difference that the heating tobacco stick is not included. In particular, the negative pressure generated when the user inhales through the air flow space 120 can be detected by a pressure sensor installed in an appropriate position.

[107] FIG. 13 is a cross-sectional view showing an apparatus for generating microparticles with induction heating according to a third second embodiment of the present invention. FIG. 14 is a cross-sectional view showing an apparatus for creating microparticles with induction heating according to a fourth second embodiment of the present disclosure. The third and fourth embodiments show an example in which the heat pipe 400 is not disposed in the insulating pipe 500, unlike the first and second embodiments, but an air layer 530 (see FIG. 14) and the heat pipe 400 functioning as a receiver is clearly formed between the insulating pipe 520. The air layer 530 functions as an insulating portion blocking heat from the heat pipe 400 to the driving coil 300. As with the 500 insulating pipe, the 520 insulating pipe can also be made of heat-resistant plastic, aerogel or paper.

[108] The lower end of the heat pipe 400 is supported by the first internal part, similar to the first and second embodiments, and this first internal part is referred to as the first internal part support 650 with a different reference numeral because its shape is slightly different. However, it supports the lower end of the heat pipe 400, similar to the first and second embodiments.

[109] The upper end of the heat pipe 400 is supported by an insulating pipe 520, which is a heat-insulating structure corresponding to the insulating pipe 500 of the first and second embodiments. The insulating pipe 520 supports the upper end of the heat pipe 400 and has a space at its outer periphery where the driving coil 300 can be wound. As previously mentioned, the air layer 530 and the insulating pipe 520 can minimize the heat transmitted from the heat pipe 400 as a receiver to the driving coil 300.

[110] In addition, on the outer surface of the heat pipe 400, the above-described heat shrink tube 460 is installed for fixing the temperature sensor 420 and the temperature sensor wire 440 for contacting with the heat pipe 400, and on the outer side of the excitation coil, a laminated sheet of graphite sheet 360 and ferrite sheet 340 is wound around the outer side of the excitation coil 300.

[111] In addition, as shown in the fourth embodiment of the invention, the heat pipe 400 can be supported by mutually arranged heat insulation rings 560 and 562 made of low thermal conductivity ceramic powder, where the first support of the inner part 650 and the insulation pipe 520, which are plastic insulation structures, support the heat pipe 400, which is a susceptor. In this way, it is possible to prevent heat from being transmitted from the heat pipe to the outside through the structures.

[112] FIG. 15 is a cross-sectional view showing an induction-heated microparticle generating device according to a fifth embodiment of the present invention. FIG. 16 is a cross-sectional view showing an induction-heated microparticle generating device according to a sixth embodiment of the present invention. The fifth and sixth embodiments differ from the previous embodiments in that the device includes an insulating tube 500 made of a heat-resistant plastic, an air layer 530, and two-layer tubes 370 and 380 as a whole as a heat-insulating structure.

[113] In this embodiment, the description of the configuration of the support 650 of the first inner portion at the lower end, the excitation coil 300, the heat pipe 400, the insulating pipe 500, and the air layer 530 can be replaced by the descriptions of the previous embodiments. The two-layer tubes 370 and 380 in the fifth embodiment in FIG. 15 are configured such that the ferrite layer 370 is located on the inner side, that is, closer to the excitation coil 300, and the insulating layer 380 is located on the outer side, that is, further away from the excitation coil 300. In contrast, in the sixth embodiment in FIG. 16, the insulating layer 380 is located on the inner side, that is, closer to the excitation coil 300, and the ferrite layer 370 is located on the outer side, that is, further away from the excitation coil 300.

[114] Due to the two-layer structure formed by stacking the ferrite layer 370 and the insulating layer 380 in a pipe shape, the ferrite layer 370 prevents the magnetic field from leaking from the excitation coil 300, and the insulating layer 380 keeps the heat generated by the heat pipe 400 from escaping to the outside, thereby reducing the heating temperature of the microparticles outside the microparticle generation device. The material of the insulating layer 380 may preferably be an aerogel or paper, and the insulating layer 380 may be 0.5 mm or more thick to ensure sufficient insulation.

[115] FIG. 17 is an exemplary block diagram of a circuit for induction heating in an induction-heated microparticle generating apparatus according to the present invention.

[116] FIG. 17 shows a device for generating microparticles with inductive heating according to the present invention, which heats the susceptor 2007 by inductive heating. Specifically, the MCU 2001 controls the power boosting circuit 2002 such that the power boosting circuit 2002 boosts the constant voltage supplied from the battery 2003 for inductive heating and supplies a constant current to the control logic of the inductive heater 2004. The power boosting circuit 2002 is used to provide a stable power supply to inductively heat the sensor 2007 when the battery 2003 is used as a power source for inductive heating. The microcontroller 2001 also supplies a PWM signal to the induction heater control logic 2004. The induction heater control logic 2004 performs a switching operation in accordance with the PWM signal input from the microcontroller 2001 to convert the direct current supplied from the power booster circuit 2002 into alternating current and supply it to the coil 2006, so that the current collector 2007 is heated inductively.

[117] The MCU 2001 supplies a PWM signal to the induction heater control logic 2004 to output a resonant frequency obtained from the values of the coil 2006 and the capacitor 2005 to increase the temperature of the susceptor 2007 at the start-up time, and the induction heater control logic 2004 supplies an alternating current to the coil 2006 at the resonant frequency.

[118] The microcontroller 2001 supplies a PWM signal to the induction heater control logic 2004 in such a way that the frequency is far from the resonant frequency, so that the temperature of the sensor 2007 does not increase further after a predetermined time has elapsed. Accordingly, the induction heater control logic 2004 supplies an alternating current to the coil 2006 with a frequency far from the resonant frequency.

[119] As described above, the microcontroller 2001 may input a PWM signal to the induction heater control logic 2004 to adjust the frequency over time in accordance with the settings. In some embodiments of the invention, the frequency of the alternating current supplied to the coil 2006 from the induction heater control logic 2004 may be adjusted by calculating the temperature of the suspensor 2007 in accordance with the values detected by the current sensor 2008 and the voltage sensor 2009, adjusting the frequency of the PWM signal in accordance with the desired temperature, and supplying the PWM signal to the heater control logic 2004. In particular, when the induction heater control logic 2004 supplies alternating current to the coil 2006, the temperature of the susceptor 2007 changes as the susceptor 2007 is inductively heated and the inductance or reactance changes. Accordingly, the current and voltage for heating the receiver 2007 are changed. The current sensor 2008 measures the current supplied to the coil 2006 and transmits it to the microcontroller 2001, and the voltage sensor 2009 converts the alternating voltage supplied to the coil 2006 into a direct voltage with a voltage level that the microcontroller can check and transmits it to the microcontroller 2001. Then, the microcontroller 2001 detects changes in the temperature of the receiver 2007 by calculating the temperature of the receiver 2007 according to changes in the current and voltage values input through the current sensor 2008 and the voltage sensor 2009, and adjusts the frequency of the PWM signal according to the desired temperature and inputs it to the control logic of the induction heater 2004. Subsequently, the control logic 2004 of the induction heater can supply alternating current to the coil 2006 while adjusting the frequency according to PWM signal input from the 2001 microcontroller.

[120] FIG. 18 is another exemplary block diagram of a circuit for induction heating in an induction-heated microparticle generating device according to the present invention. The components in FIG. 18, designated by the same reference numerals as in FIG. 17, operate in a similar manner. FIG. 18 shows a temperature sensor 2010 for detecting the temperature of the susceptor 2007. The value detected by the temperature sensor 2010 is input to the microcontroller 2001, and therefore, the microcontroller 2001 detects changes in the temperature of the sensor 2007, adjusts the frequency of the PWM signal according to the desired temperature, and inputs it to the induction heater control logic 2004. The induction heater control logic 2004 may then supply alternating current to the coil 2006 while simultaneously adjusting the frequency in accordance with the PWM signal input from the microcontroller 2001.

Claims (28)

1. A microparticle generating device that is entrapped and portable in size, including an aerosol-forming substrate inside, has a cavity into which a smoking article can be inserted, including wrapping paper located outside, and forms an aerosol by heating the aerosol-forming substrate of the smoking article inserted into the cavity, wherein the microparticle generating device comprises: a multi-wound excitation coil installed inside the device; a susceptor located inside the excitation coil so as to be surrounded by the excitation coil inside the device, which is made of a hollow cylindrical thin sheet defining a cavity and is heated to a temperature of 400°C or lower due to induction heating caused by eddy current losses in reaction with the excitation coil, wherein the inner surface of the susceptor contacts at least part of the outer surface of the wrapping paper of the smoking article placed in the cavity, and the heated susceptor, being heated inductively, heats the aerosol-forming substrate inside the wrapping paper due to heat transfer, thereby forming an aerosol; an insulating part provided between the current collector and the excitation coil inside the device to prevent heat transfer from the current collector to the excitation coil; a structure located within the device for supporting at least a portion of one or more of the susceptor and the excitation coil; a susceptor temperature obtaining unit located inside the device for obtaining the susceptor temperature; a battery provided inside the device that functions as a DC power source; and a control unit, electrically connected to the excitation coil, the susceptor temperature receiving unit and the battery, which receives direct current power from the battery, supplies an alternating current with a resonant frequency or an alternating current with a frequency far from the resonant frequency to the excitation coil, and inductively heats the susceptor to a predetermined temperature, wherein the structure includes a two-layer tube consisting of a ferrite layer for preventing leakage of the magnetic field from the excitation coil and an insulating layer for preventing heat transfer from the susceptor to other components, which is designed to cover the outer side of the excitation coil. 2. A device for generating microparticles according to claim 1, additionally containing a susceptor, which is introduced through the center of the bottom of the smoking article inserted into the cavity, and is heated upon direct contact with the aerosol-forming substrate inside the smoking article. 3. A device for generating microparticles according to claim 1, wherein the susceptor is made from a sheet of stainless steel. 4. A device for generating microparticles according to claim 1, wherein the insulating part is an air layer provided between the current collector and the excitation coil. 5. The device for generating microparticles according to claim 1, wherein the structure further comprises an insulating tube outside the receiver that supports at least part of the susceptor, wherein the excitation coil is wound around the outside of the structure, and the insulating part is formed between the insulating tube and the susceptor. 6. The device for generating microparticles according to claim 5, wherein the structure further comprises a heat-insulating ring made of ceramic powder with low thermal conductivity, wherein the structure and the insulating pipe support the suscector to prevent heat leakage from the suscector to the outside. 7. A device for generating microparticles according to claim 5, wherein the insulating tube is made of heat-resistant plastic, and the insulating layer additionally contains a layer of aerogel, which is designed with the possibility of covering the outer side of the excitation coil. 8. A device for generating microparticles according to claim 5, wherein the insulating tube is made of heat-resistant plastic, and the insulating layer comprises a paper layer that is designed to cover the outer side of the excitation coil. 9. A device for generating microparticles according to claim 7 or 8, wherein the aerogel layer or the paper layer included in two layers has a thickness of 0.5 mm or more. 10. A device for generating microparticles according to any one of claims 1-4 or 5-9, further comprising a pressure sensor in the path of the air flow communicating with the cavity for detecting negative pressure caused by the user's puffing on the smoking article inserted into the cavity. 11. A device for generating microparticles according to any one of claims 1-4 or 5-9, wherein the current collector temperature detection unit calculates the temperature of the current collector in accordance with changes in current and voltage from a current sensor and a voltage sensor that measure changes in current and voltage for heating the current collector caused by the value of inductance or reactance that changes depending on the change in temperature of the receiver. 12. A device for generating microparticles according to any one of claims 1-4 or 5-9, wherein the unit for obtaining the temperature of the susceptor is a temperature sensor that contacts the outer surface of the susceptor and measures the temperature by detecting changes in resistance caused by a change in the temperature of the susceptor, and the output wire of the temperature sensor is electrically connected to the control unit. 13. The device for generating microparticles according to claim 12, wherein the temperature sensor and the output wire of the temperature sensor are covered with a heat-resistant heat-shrinkable tube covering the outer surface of the susceptor for contact with the outer surface of the susceptor. 14. A device for generating microparticles according to any one of claims 1-4 or 5-9, wherein the smoking article contains a cartridge with liquid inside. 15. A device for generating microparticles according to claim 14, wherein the liquid cartridge comprises a liquid or gel composition containing VG glycerin. 16. A device for generating microparticles according to claim 14, wherein the smoking article additionally includes tobacco mass before or after the liquid cartridge. 17. A device for generating microparticles according to claim 14, wherein the smoking article further comprises a filter and a tube and is formed by wrapping the filter, tube and liquid cartridge in a single piece of wrapping paper. 18. A device for generating microparticles according to any one of claims 1-4 or 5-9, wherein the smoking article includes a tobacco mass containing glycerin VG. 19. A device for generating microparticles according to claim 18, wherein the smoking article further comprises a filter and a tube and is formed by wrapping the filter, tube and tobacco mass in a single piece of wrapping paper.