Aerosol-generating device, method of manufacturing an aerosol-generating device, and aerosol-generating system

Abstract

The application provides an aerosol generating device and a preparation method thereof, and an aerosol generating system, and belongs to the technical field of novel tobacco and aerosol generation. The aerosol generating device comprises an aerosol generating assembly and a wrapping layer wrapped outside the aerosol generating assembly. The aerosol generating assembly comprises, in sequence along an axial direction, an aerosol generating section, a hollow section and a filter section. The hollow section comprises a hollow base layer and a three-dimensional composite fiber bundle filled in the hollow base layer. The three-dimensional composite fiber bundle comprises a tubular fiber base and fiber filaments radially extending outward from the tubular fiber base. The tubular fiber base has an airflow channel penetrating through the tubular fiber base in the axial direction. An end of the fiber filaments away from the tubular fiber base abuts against an inner wall of the hollow base layer. The three-dimensional composite fiber bundle and the hollow base layer are self-locked and fixed by interference fit between the fiber filaments and the hollow base layer.

Description

Technical Field

[0001] This invention belongs to the field of novel tobacco and aerosol generation technology, and particularly relates to an aerosol generating device and its preparation method, as well as an aerosol generating system. Background Technology

[0002] Traditional cigarettes produce smoke from burning tobacco, releasing large amounts of harmful substances such as aldehydes and phenols, which endanger human and environmental health. Heated non-combustible aerosol generators, which generate aerosols by heating a tobacco matrix at low temperatures, can effectively reduce the release of harmful components. Related products have been widely researched and promoted.

[0003] However, aerosol generators still have many problems, such as: low aerosol generation, resulting in a thin inhalation flavor; significant differences in aroma before and after release, with aroma decaying noticeably in the later stages of inhalation; limited smoke purification effect, with insufficient retention of harmful components; and complex overall product structure design and cumbersome processing procedures, which are not conducive to large-scale production. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an aerosol generating device and its preparation method, as well as an aerosol generating system, in order to at least partially solve the above-mentioned technical problems. The specific technical solutions provided by this invention are as follows.

[0005] In one aspect of the present invention, an aerosol generating device is provided, the aerosol generating device comprising an aerosol generating component and a wrapping layer surrounding the aerosol generating component. The aerosol generating component comprises, along an axial direction, a sequentially connected aerosol generating section, a hollow section, and a filtering section. The hollow section comprises a hollow base layer and a three-dimensional composite fiber bundle filled inside the hollow base layer. The three-dimensional composite fiber bundle comprises a tubular fiber substrate and fiber filaments extending radially outward along the tubular fiber substrate. The tubular fiber substrate has an axially penetrating airflow channel inside. The end of the fiber filament away from the tubular fiber substrate abuts against the inner wall of the hollow base layer, and the three-dimensional composite fiber bundle is self-locked and fixed to the hollow base layer by the interference fit between the fiber filament and the hollow base layer.

[0006] In a second aspect of the present invention, a method for preparing the above-mentioned aerosol generating device is provided, comprising: depositing a fiber layer on the surface of a mandrel using electrospinning to obtain a tubular fiber substrate; inserting fiber filaments into the pores of the tubular fiber substrate; melting and bonding the fiber filaments with the tubular fiber substrate by ultrasonic heat sealing; removing the mandrel after shaping to obtain a three-dimensional composite fiber bundle; inserting the three-dimensional composite fiber bundle into the interior of a hollow base layer, achieving self-locking fixation by the interference fit between the fiber filaments and the inner wall of the hollow base layer; cutting to obtain a hollow section; axially aligning and connecting the filter section, the hollow section, and the aerosol generating section to obtain an aerosol generating component; and encapsulating the aerosol generating component entirely with an encapsulation layer to obtain the aerosol generating device.

[0007] In a third aspect of the present invention, an aerosol generating system is provided, which includes the above-described aerosol generating device and heating appliance.

[0008] The technical solutions provided by the embodiments of the present invention have the following advantages compared with the prior art.

[0009] An aerosol generator is provided, wherein a three-dimensional composite fiber bundle inside the hollow section achieves self-locking fixation through an interference fit between the radially extending fiber filaments and the inner wall of the hollow base layer. After assembly, the internal structure is robust and not easily displaced or detached. This three-dimensional composite fiber bundle has a larger heat exchange contact area for flue gas, and the outwardly extending fiber filaments continuously disturb the flue gas, achieving a superior cooling effect. Furthermore, the three-dimensional composite fiber bundle can be impregnated with various functional components to achieve diversified flue gas control functions, integrating multiple functions such as flue gas disturbance, airflow cooling, and harmful substance adsorption into the same hollow section, effectively simplifying the overall segmented structure of the aerosol generator. It balances a simple and compact product structure, a stable and comfortable inhalation experience, and excellent flue gas harm reduction performance. An aerosol generation system including the above-mentioned aerosol generator and a matching heater can adjust operating parameters such as heating temperature and duration through the heater to maintain a stable aerosol generation state, ensuring a smooth inhalation experience for the user throughout the entire process.

[0010] The preparation method of the aerosol generating device of the present invention adopts electrospinning combined with ultrasonic heat sealing process to form a three-dimensional composite fiber bundle in one piece, and then completes the assembly of the hollow section by interference fit. The overall process is simple. Each functional component is aligned and spliced ​​and uniformly wrapped with an outer layer, which can be adapted to industrial mass production.

[0011] Instruction manual illustrations

[0012] Figure 1 A schematic diagram of an aerosol generating apparatus according to an embodiment of the present invention is shown.

[0013] Figure 2 A schematic diagram of the longitudinal cross-sectional structure of the hollow section of an aerosol generator according to an embodiment of the present invention is shown.

[0014] Figure 3 The schematic diagram illustrates the transverse cross-sectional structure of the hollow section of an aerosol generating device according to an embodiment of the present invention.

[0015] The above figures include the following reference numerals:

[0016] 1-Aerosol generation section; 2-Hollow section; 3-Filtration section; 4-Fiber filaments; 5-Tube fiber substrate; 6-Internal airflow channel. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a full understanding of embodiments of the invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0019] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0020] In the process of developing this invention, it was discovered that conventional hollow components in current heated tobacco products can only achieve the single function of ventilation and simple cooling, making it difficult to simultaneously achieve multiple functions such as smoke regulation, aroma enhancement, and purification. To simultaneously optimize smoke volume, inhalation taste, harm reduction capacity, and smoke cooling effect, multiple independent functional filter rods need to be added, which not only significantly increases the structural complexity of the cigarette but also causes appearance defects such as smoke-generating agent leakage and yellow spots on the cigarette surface.

[0021] Based on this, the present invention provides an aerosol generating device. By designing an integrated hollow section structure, a three-dimensional composite fiber bundle that can be self-locking and fixed is set inside the hollow base layer. The three-dimensional structure of the fiber bundle simultaneously realizes smoke disturbance, cooling and purification. At the same time, the device can expand the diversified smoke regulation capabilities by impregnating functional components. It integrates multiple functions to simplify the cigarette structure and is equipped with a matching integrated preparation process and aerosol generating system. While improving smoke output, enhancing aroma uniformity, and optimizing smoke purification and cooling performance, it simplifies the production process and improves the problems of existing products with complex structures, high mass production difficulty and insufficient overall user experience.

[0022] According to one aspect of the present invention, an aerosol generating device is provided. The aerosol generating device includes an aerosol generating component and a wrapping layer surrounding the aerosol generating component. The aerosol generating component includes, along the axial direction, an aerosol generating section, a hollow section, and a filtering section connected in sequence. The hollow section includes a hollow base layer and a three-dimensional composite fiber bundle filled inside the hollow base layer. The three-dimensional composite fiber bundle includes a tubular fiber substrate and fiber filaments extending radially outward along the tubular fiber substrate. The tubular fiber substrate has an axially penetrating airflow channel inside. The end of the fiber filament away from the tubular fiber substrate abuts against the inner wall of the hollow base layer. The three-dimensional composite fiber bundle and the hollow base layer are self-locked and fixed by the interference fit between the fiber filament and the hollow base layer.

[0023] According to an embodiment of the present invention, the aerosol generating assembly comprises an aerosol generating section, a hollow section, and a filtration section arranged sequentially along the axial direction. The aerosol generating section is used to stably generate aerosols upon heating; the hollow section is used for flow, buffering, cooling, and regulating the flue gas state; and the filtration section is used to purify and filter the output aerosols. The overall airflow path is continuous and smooth. Simultaneously, the external wrapping layer can tightly fix each component, preventing problems such as detachment and leakage during use, while also providing moisture and pollution protection, thus protecting the performance of the internal components.

[0024] The hollow section of the aerosol generating component of this invention is filled with three-dimensional composite fiber bundles inside the hollow base layer, eliminating the need for additional independent functional filter rods. This simplifies the overall segmented layout of the cigarette and reduces the complexity of the product structure. The three-dimensional composite fiber bundles consist of a tubular fiber substrate and radially radiating fiber filaments. The tubular fiber substrate has a pre-reserved axially penetrating airflow channel, ensuring basic airflow and maintaining comfortable suction resistance without airflow blockage. The outwardly radiating fiber filaments effectively increase the heat exchange area of ​​the smoke. As the smoke flows, it is continuously disturbed by the fiber filaments, improving heat exchange efficiency and alleviating the discomfort caused by high-temperature smoke during inhalation. The ends of the radiating fiber filaments abut against the inner wall of the hollow base layer, achieving self-locking fixation through an interference fit between the two, eliminating the need for additional adhesives and simplifying the hollow section processing steps. Furthermore, the interwoven three-dimensional composite fiber bundles form abundant pores with sufficient specific surface area, allowing for the impregnation of various functional components according to usage requirements to achieve different types of smoke regulation, thus optimizing the overall user experience of the aerosol generating device.

[0025] According to embodiments of the present invention, by matching and optimizing the dimensions and structural parameters of the aerosol generator as a whole and its functional sections, the structures, airflow paths, and assembly relationships are coordinated, thereby improving the structural stability and processing performance of the aerosol generator. The length of the aerosol generator is 40~100mm, and the outer diameter is 1.5~8mm. This size range can be adapted to most existing heating appliances, while ensuring that the airflow resistance during suction is within a comfortable range, thus improving the user experience.

[0026] The filtration section has a length of 6-20mm; the hollow section has a length of 15-40mm; and the aerosol generation section has a length of 10-45mm. By rationally allocating the axial lengths of each functional section, a balanced layout of the aerosol generator's smoke generation, gas regulation, cooling, and filtration functions is achieved. The hollow tube's dimensions are designed to ensure structural stability, preventing deformation during use, while also ensuring smooth airflow. The hollow base layer of the hollow section can be made of materials such as hollow paper tubes or hollow cellulose acetate tubes, which offer advantages such as environmental friendliness, easy degradation, and low cost, and are well-compatible with fiber bundles. The length of the aerosol generation section is designed to fit the heating area of ​​the heating appliance, ensuring sufficient heating of the smoke-generating substance and avoiding resource waste.

[0027] Furthermore, the structural parameters of the hollow section were optimized and adapted. The wall thickness of the hollow base layer is 0.2~1.2mm, and the inner diameter is 1.5mm~8.0mm. This ensures sufficient structural strength of the hollow base layer while preventing deformation and collapse during processing and use, providing a reasonable assembly space for the three-dimensional composite fiber bundle. The wall thickness of the tubular fiber substrate is 0.1mm~0.3mm. While ensuring the integrity and structural stability of the tubular fiber substrate, the obstruction of the substrate structure on airflow is reduced. Combined with airflow channels with a diameter of 1mm~4mm, this ensures smooth central airflow and moderate suction resistance, meeting the requirements of conventional suction airflow and effectively avoiding problems such as airflow blockage and excessive suction resistance.

[0028] This invention relies on the interference fit between the fiber filaments and the hollow base layer, with an interference fit allowance of 0.05mm to 2mm. This size ensures that the three-dimensional composite fiber bundle is reliably self-locked after being inserted into the hollow base layer. This avoids problems such as the fiber bundle not being firmly fixed, loosening, shifting, or falling off during use due to insufficient interference fit, while also preventing assembly difficulties, fiber structure compression deformation, and airflow channel blockage caused by excessive interference fit.

[0029] According to an embodiment of the present invention, the fiber filaments can be spirally wound along the outer wall of the tubular fiber substrate. The spiral winding arrangement allows the radiating fiber filaments to form a continuous three-dimensional network inside the hollow section, which can disturb the flue gas through a longer path, prolong the flue gas heat exchange and contact reaction time, and improve the cooling and flue gas control effect.

[0030] According to an embodiment of the present invention, the axial spacing between adjacent spiral coils is 0.5mm to 10mm. Controlling the axial spacing within this range avoids both excessively small coil spacing (causing fiber stacking, airflow channel blockage, and excessively high suction resistance) and excessively large coil spacing (leading to sparse fiber distribution, insufficient flue gas disturbance, and insufficient heat exchange area). The angle between the spiral line of the fiber and the central axis of the hollow section is 15° to 60°, balancing the radial support effect of the fiber and the axial airflow space. If the angle is too small (less than 15°), the fiber will tend to be parallel to the airflow direction, reducing the flue gas disturbance capability; if the angle is too large (greater than 60°), the radial support force of the fiber is insufficient, making it difficult to form an effective fixation with the inner wall of the hollow base layer. The filling rate of the three-dimensional composite fiber bundle in the hollow section is 15% to 50%. A filling rate below 15% results in sparse internal fibers, insufficient heat exchange area, and weak flue gas purification and slow-release effects; a filling rate above 50% significantly compresses the airflow space, increasing suction resistance.

[0031] According to an embodiment of the present invention, the tubular fiber substrate is prepared by electrospinning, with a porosity ≥70%. The electrospinned tubular fiber substrate has a well-developed overall pore structure and good pore connectivity. Combined with a high porosity of ≥70%, the tubular fiber substrate has a large specific surface area, providing sufficient loading sites and permeation space for subsequent impregnation of functional components, which is conducive to the uniform adsorption and stable slow release of functional components. At the same time, the high porosity reduces airflow resistance, ensuring smooth flue gas flow. In the tubular fiber substrate of the present invention, the diameter of a single fiber is 0.5~20μm and the length is 3~50mm. The micron-level fiber fineness and appropriate fiber length allow the fibers to be fully and uniformly interwoven during the forming process, forming a uniform and regular porous network structure, further increasing the contact area of ​​flue gas and enhancing the heat exchange, adsorption, and comprehensive regulation effects of flue gas.

[0032] According to embodiments of the present invention, the tubular fiber substrate and the fiber filaments are each independently selected from at least one of porous calcium alginate fiber bundles, cellulose diacetate fiber bundles, and polypropylene tobacco fiber bundles; the filtration section includes at least one of cellulose acetate, propylene fiber, and polylactic acid fiber, which have good filtration performance and can effectively filter out small particles in aerosols, improving the purity of aerosols. The combination of multiple fibers can adjust the filtration effect according to needs, and the length design takes into account both filtration effect and suction resistance; the aerosol generating section includes a smoke-generating substance and a smoke-generating agent, with a mass ratio of smoke-generating substance to smoke-generating agent of 90:10 to 70:30; the smoke-generating substance includes at least one of tobacco shreds, stem shreds, expanded tobacco shreds, and reconstituted tobacco leaves, and the smoke-generating substance is at least one of granular, filamentous, and powdered forms; the smoke-generating agent includes at least one of glycerin and propylene glycol; the wrapping layer is tobacco tipping paper. In actual production and application, the types of materials for each structure can be selected individually or in combination according to the product's cooling and filtration requirements, suction taste, and production process requirements, so as to flexibly adapt to aerosol generators of different specifications and performance.

[0033] According to an embodiment of the present invention, based on the total mass of the three-dimensional composite fiber bundle, the three-dimensional composite fiber bundle is impregnated and loaded with 0.5% to 3% functional components, including at least one of adsorbent materials, aroma control materials, and smoke-generating aids. Through impregnation and loading, the three-dimensional composite fiber bundle can have functions such as smoke purification, aroma control, and smoke stabilization, realizing the integration of multiple functions in a single structure.

[0034] The adsorption material includes at least one of activated carbon and metal oxides. Activated carbon has excellent adsorption performance, while metal oxides (such as alumina and zinc oxide) have a certain catalytic purification effect and can adsorb harmful components such as aldehydes and phenols, further improving the purity of the generated aerosol.

[0035] Flavor control materials include at least one of flavorings and fragrances and flavor sustained-release agents. Flavorings and fragrances for tobacco can enrich the taste and aroma of aerosols, while flavor sustained-release agents can continuously release the aroma and prolong the aroma experience during smoking.

[0036] Smoke-generating agents include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, oleyl alcohol, xylitol, and erythritol. These agents increase aerosol production, resulting in a richer, more intense smoking experience. Multiple smoke-generating agents can be combined to adjust aerosol concentration and flavor. Simultaneously, they can reduce the amount of smoke-generating agents in the aerosol-generating matrix, thus minimizing the yellowing problem caused by the leakage of smoke-generating agents from the matrix.

[0037] According to a second aspect of the present invention, a method for preparing the above-described aerosol generating device is provided, comprising:

[0038] A tubular fiber substrate is obtained by electrospinning to deposit a fiber layer on the surface of a mandrel. The fiber filaments are then inserted into the pores of the tubular fiber substrate and ultrasonically heat-sealed to melt and bond the fiber filaments to the tubular fiber substrate. After shaping, the mandrel is removed to obtain a three-dimensional composite fiber bundle.

[0039] Three-dimensional composite fiber bundles are inserted into the hollow base layer, and self-locking is achieved by the interference fit between the fiber filaments and the inner wall of the hollow base layer. After cutting, hollow sections are obtained.

[0040] By axially aligning and connecting the filtration section, hollow section, and aerosol generation section, an aerosol generating component is obtained. The aerosol generating component is then completely encapsulated with a coating layer to produce an aerosol generating device.

[0041] According to embodiments of the present invention, the preparation method of the sol-generating device utilizes electrospinning to form a tubular fiber substrate, which allows control over the substrate wall thickness, porosity, and fiber fineness, resulting in a uniform and stable pore structure in the tubular fiber substrate. The fiber filaments are then interlaced into the pores of the tubular fiber substrate and bonded using ultrasonic heat sealing. Local ultrasonic hot pressing allows for micro-melting and bonding at the contact points, eliminating the need for additional adhesives and achieving a strong bond between the fiber filaments and the tubular fiber substrate. This avoids adhesive clogging of the fiber pores and affecting air permeability and load-bearing performance. Furthermore, the localized ultrasonic heat sealing process does not significantly damage the original porous structure of the fiber. After shaping and removing the core mold, a well-structured three-dimensional composite fiber bundle is formed in one step. The hollow section relies on the interference fit between the fiber filaments and the inner wall of the hollow substrate for self-locking, saving additional fixing processes such as bonding and snapping, making the operation simple and efficient. The functional sections are axially aligned and spliced ​​to form an aerosol generating component. Finally, it is entirely wrapped with cigarette tipping paper. The manufacturing process does not require large-scale modifications to existing cigarette processing equipment and is suitable for industrial mass production.

[0042] In some specific embodiments, the preparation method of the tubular fiber substrate is as follows.

[0043] (1) Preparation of spinning solution

[0044] Select compliant tobacco-grade base materials such as cellulose diacetate and polypropylene fiber, prepare a spinning solution with a mass fraction of 8% to 15%, add 1% to 3% of volatile pore-forming agent, stir evenly, and then vacuum degas for 15 to 30 minutes.

[0045] (2) Electrospinning

[0046] A continuous fiber layer is formed by directly depositing a ring-shaped coaxial spinneret, setting the spinning voltage to 12~25kV, the feed speed to 0.2~0.8mL / h, and the receiving distance to 12~20cm.

[0047] (3) In-situ hole drilling and shaping

[0048] By controlling the relative humidity of the environment to 50%~65%, uniform pores are formed on the surface and inside of the fiber membrane through gas-phase induced phase separation. After being set by hot air at 80℃ for 10~20s, a tubular fiber substrate with a wall thickness of 0.1~0.3mm and a porosity of ≥70% is obtained.

[0049] According to an embodiment of the present invention, the ultrasonic power of ultrasonic heat sealing is 700~1300W, the heat sealing temperature is 80~160℃, and the heat sealing time is 0.5~2s. The above-mentioned ultrasonic heat sealing parameters can ensure the connection strength between the fiber filament and the tubular fiber substrate without damaging the fiber structure.

[0050] According to an embodiment of a third aspect of the present invention, an aerosol generating system is provided, the aerosol generating system including the above-described aerosol generating device and heating appliance.

[0051] According to an embodiment of the present invention, the heating device can uniformly heat the aerosol generation section inside the aerosol generator to stably generate aerosols. Combined with the hollow section of the aerosol generator with a multifunctional three-dimensional fiber control structure, it can stably output aerosols with suitable temperature, uniform taste, and higher purity. The whole system has strong adaptability and excellent user experience.

[0052] According to an embodiment of the present invention, the heating device includes: a heating component for heating the aerosol generating matrix in the aerosol generating device to generate aerosols; and a housing for accommodating the heating component and the control component. The functional components of the heating device have clearly defined roles and work together harmoniously, enabling precise temperature control and a stable and continuous heat source output. When used in conjunction with the aerosol generating device, it provides uniform smoke generation and convenient operation.

[0053] In some specific embodiments, the heating device may also include a battery assembly and a control assembly. The battery assembly is used to power the heating device, or an external battery may be connected to power the heating device. The control assembly is used to regulate the battery assembly.

[0054] The present invention will be further illustrated below through embodiments and related test experiments. In the following detailed description, numerous specific details are set forth for ease of explanation to provide a comprehensive understanding of the embodiments of the present invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Moreover, the details in the following embodiments can be arbitrarily combined to form other feasible embodiments without conflict. All instruments, consumables, and reagents used in the following embodiments are commercially available unless otherwise specified.

[0055] Example 1

[0056] This invention provides an aerosol generating device, and the specific preparation method of the aerosol generating device is as follows.

[0057] (1) Preparation of hollow section

[0058] A 10% (w / w) cellulose diacetate spinning solution was prepared, and 1.5% acetone, a volatile pore-forming agent, was added. After stirring evenly, the solution was degassed under vacuum for 30 minutes. A ring-shaped coaxial spinneret was used, with a spinning voltage of 16 kV, a feed speed of 0.3 mL / h, and a receiving distance of 13 cm. A continuous fiber layer was directly deposited on the surface of a rotating mandrel. The relative humidity was controlled at 65%. Uniform pores were formed on the surface and inside of the fiber membrane through gas-phase induced phase separation. After hot air setting at 80℃ for 20 seconds, a tubular fiber substrate with a wall thickness of 0.1 mm and a porosity ≥70% was obtained.

[0059] Cellulose diacetate fibers are inserted into the pores of the tubular fiber substrate, with a filling rate of 15% for the three-dimensional composite fiber bundle in the hollow section. The fibers are melted and bonded to the tubular fiber substrate by ultrasonic heat sealing. The ultrasonic power of the heat sealing is 900W, the heat sealing temperature is 95℃, and the heat sealing time is 1s. After shaping, the mandrel is removed to obtain the three-dimensional composite fiber bundle. The three-dimensional composite fiber bundle is then impregnated with 2.0% tobacco menthol flavoring and 0.5% flavor slow-release agent.

[0060] The impregnated three-dimensional composite fiber bundle is inserted into a hollow cellulose acetate tube. Self-locking is achieved by the 0.5mm interference fit between the fiber and the inner wall of the hollow base layer. After cutting, a hollow section with a length of 28mm is obtained.

[0061] (2) Preparation of aerosol generation section

[0062] Tobacco sheets were mixed with glycerol to obtain an aerosol generating matrix with a glycerol mass percentage of 16%. The tobacco sheets were cut into shreds, rolled into tobacco segments, and then slit to produce aerosol generating segments with a length of 41 mm.

[0063] (3) Preparation of aerosol generating device

[0064] A 6mm long cellulose acetate filter rod is selected as the filter section and axially aligned with the hollow section and aerosol generation section to obtain an aerosol generating component. The aerosol generating component is then wrapped with a splicing paper wrapping layer to obtain an aerosol generating device with a diameter of 7.0mm and an overall length of 75mm.

[0065] Example 2

[0066] This invention provides an aerosol generating device. The preparation method of this aerosol generating device differs from that of Example 1 in that: the fiber filaments are spirally wound along the outer wall of the tubular fiber substrate; wherein the axial spacing between adjacent spiral coils is 0.5 mm; and the angle between the spiral line of the fiber filaments and the central axis of the hollow section is 30°.

[0067] Example 3

[0068] This invention provides an aerosol generating device. The preparation method of this aerosol generating device differs from that of Example 1 in that: the mass percentage of glycerol in the aerosol generating matrix of the aerosol generating section is 12%; in addition to tobacco menthol flavoring and flavor slow-release agent, the three-dimensional composite fiber bundle is also impregnated with 4% glycerol calculated by the weight of the aerosol matrix.

[0069] Example 4

[0070] This invention provides an aerosol generating device. The preparation method of this aerosol generating device differs from that of Example 1 in that there is no impregnation material on the three-dimensional composite fiber bundle.

[0071] Comparative Example 1

[0072] The present invention provides an aerosol generating device in a comparative example. The difference between the preparation method of the aerosol generating device and that of Example 1 is that no three-dimensional composite fiber bundle is set in the hollow section.

[0073] The aerosol generating devices prepared in the above embodiments and comparative examples were subjected to ambient heating at a set temperature of 260°C. The lip temperature, glycerol release, phenolic compound release, and the time it took for yellow spots to appear on the cigarette were monitored. The specific detection methods are as follows.

[0074] (1) Detection of glycerol release

[0075] Heated non-combustible cigarettes were smoked using a linear smoking machine. The smoking parameters were as follows: smoking volume 55 mL, smoking time 2 s, smoking interval 30 s, number of puffs 10, preheating time 15 s, and a bell-shaped smoking curve. Particulate matter in the aerosol of heated non-combustible cigarettes was captured using 44 μm Cambridge filters, with each filter capturing particulate matter from 5 cigarette samples. Gas chromatography-thermal conductivity detector (GC-TCD) was used for detection. The specific glycerol content was tested by referring to the literature "Wang Kang, Liu Jun, Xiao Shaohong, et al. Simultaneous detection of moisture, nicotine, glycerol, 1,2-propanediol, triacetin and menthol release in heated non-combustible cigarette aerosol by GC-TCD method [J]. Tobacco Science and Technology, 2019, 52(03):63-68".

[0076] (2) Detection of phenolic compounds in flue gas

[0077] The specific reference is "Zhang Liang, Liu Xianjun, Wang Ying, et al. Study on the release of phenolic compounds in heated non-combustible cigarettes and traditional cigarettes under two smoking modes [J]. Journal of Hunan University of Arts and Sciences (Natural Science Edition), 2024, 36(04): 36-39, 92", which is used to detect phenolic compounds in cigarette smoke.

[0078] (3) Monitoring the time of yellow spots appearing on cigarettes

[0079] The aerosol generating devices prepared in the above embodiments and comparative examples were placed in a constant temperature and humidity chamber with a humidity of 60% and a temperature of 25°C, and the time required for the aerosol generating section to begin to exude yellow spots was observed.

[0080] (4) Lip temperature test

[0081] Thermocouples were used to test the temperature of the filter section during the suction process.

[0082] Table 1 shows the performance test comparison data of each embodiment and the comparative example.

[0083] Table 1

[0084]

[0085] As shown in Table 1, compared with Comparative Example 1, which did not have a three-dimensional composite fiber bundle in the hollow section, the contact lip temperature of the aerosol generating device in each embodiment of the present invention was significantly reduced, and the release of phenolic harmful substances in the smoke was significantly reduced, resulting in excellent cooling and harm reduction effects. In Examples 1 to 3, the aroma was impregnated with a flavor slow-release agent, and the aroma was uniform and stable throughout the smoking process, without any problem of aroma decay in the later stage. In Example 3, an additional glycerol smoking aid was loaded into the fiber bundle, which could appropriately reduce the amount of glycerol added in the aerosol generating section, and the time for yellow spots to appear on the cigarette was greatly extended, resulting in better appearance stability. In Example 4, which did not have functional components impregnated, although it had basic cooling and purification capabilities, the aroma persistence was poor and the contact lip temperature was relatively high, further proving that loading adsorption, aroma, and smoking functional components into the three-dimensional composite fiber bundle could further optimize the cooling, harm reduction, taste, and appearance impermeability performance.

[0086] In summary, the technical solution provided by the present invention has the following advantages compared with the prior art: (1) Multifunctional integration: By loading different functional components on the fiber bundle of the hollow device, multiple functions such as adsorption of harmful components, uniform release of aroma, and increase in aerosol generation are realized, which effectively solves many problems existing in the existing device; (2) Improved taste: The use of aroma slow-release agent makes the aroma substances uniformly released during the inhalation process, avoiding the situation of insufficient aroma in the later stage of inhalation, and the increased aerosol generation makes the taste fuller; (3) Healthy and environmentally friendly: Functional components such as activated carbon and metal oxides can effectively adsorb harmful compounds in flue gas, reducing the harm to human health; The heating-non-combustion method also reduces the emission of harmful gases, making it more environmentally friendly; (4) Simple preparation: The preparation method is simple and easy to implement, and each component can be prefabricated and assembled, which is compatible with existing production lines and is conducive to large-scale production and application; (5) Good system adaptability: The size of the aerosol generator is compatible with mainstream heating appliances, and the control components of the heating appliances can accurately adjust the heating temperature, ensuring the stability and consistency of aerosol generation.

[0087] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An aerosol-generating device, characterized by, The aerosol generating device includes an aerosol generating component and a wrapping layer surrounding the aerosol generating component. The aerosol generating component comprises, along its axial direction, a sequentially connected aerosol generating section, a hollow section, and a filtration section. The hollow segment includes a hollow base layer and a three-dimensional composite fiber bundle filling the interior of the hollow base layer; The three-dimensional composite fiber bundle includes a tubular fiber substrate and fiber filaments extending radially outward along the tubular fiber substrate, wherein the tubular fiber substrate has an axially penetrating airflow channel inside. The end of the fiber filament furthest from the tubular fiber substrate is pressed against the inner wall of the hollow base layer. The three-dimensional composite fiber bundle is self-locked and fixed to the hollow base layer by the interference fit between the fiber filament and the hollow base layer.

2. The aerosol generating device according to claim 1, characterized in that, The aerosol generator has a length of 40-100 mm and an outer diameter of 1.5-8 mm. The length of the filter section is 6~20mm; The length of the hollow section is 15~40mm; The hollow base layer has a wall thickness of 0.2~1.2mm and an inner diameter of 1.5mm~8.0mm; The wall thickness of the tubular fiber substrate is 0.1 mm to 0.3 mm; The diameter of the airflow channel is 1mm to 4mm. The length of the aerosol generation section is 10~45mm. The allowance for the interference fit is 0.05mm to 2mm.

3. The aerosol generating device according to claim 1, characterized in that, The fibers are spirally wound along the outer wall of the tubular fiber substrate; wherein... The axial spacing between adjacent spiral coils is 0.5mm~10mm; The angle between the helix of the fiber and the central axis of the hollow section is 15° to 60°. The filling rate of the three-dimensional composite fiber bundles in the hollow section is 15%~50%.

4. The aerosol generating device according to claim 1, characterized in that, The tubular fiber substrate was prepared by electrospinning and has a porosity of ≥70%. The diameter of a single fiber in the tubular fiber substrate is 0.5~20μm and the length is 3~50mm.

5. The aerosol generating device according to claim 1, characterized in that, The tubular fiber substrate and the fiber filaments are each independently selected from at least one of porous calcium alginate fiber bundles, cellulose diacetate filament bundles and polypropylene tobacco filament bundles. The filtration section includes at least one of cellulose acetate, cellulose acrylic, and polylactic acid fiber; The aerosol generation section includes a smoke-generating substance and a smoke-generating agent, wherein the mass ratio of the smoke-generating substance to the smoke-generating agent is 90:10 to 70:

30. The smoking substance includes at least one of tobacco shreds, stem shreds, expanded tobacco shreds, and reconstituted tobacco leaves, and the smoking substance is at least one of granular, filamentous, and powdered forms; The smoke-generating agent includes at least one of glycerin and propylene glycol; The wrapping layer is cigarette tipping paper.

6. The aerosol generating device according to claim 1, characterized in that, Based on the total mass of the three-dimensional composite fiber bundle, the three-dimensional composite fiber bundle is impregnated and loaded with 0.5% to 3% functional components, wherein the functional components include at least one of adsorbent materials, flavor-regulating materials, and smoke-generating agents; wherein... The adsorption material includes at least one of activated carbon and metal oxides; The aroma-regulating material includes at least one of fragrances and flavorings and aroma-releasing agents. The smoking aid includes at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, oleyl alcohol, xylitol, and erythritol.

7. A method of manufacturing an aerosol-generating device according to any one of claims 1 to 6, wherein The preparation method includes: A tubular fiber substrate is obtained by electrospinning to deposit a fiber layer on the surface of a mandrel. The fiber filaments are then inserted into the pores of the tubular fiber substrate and ultrasonically heat-sealed to melt and bond the fiber filaments to the tubular fiber substrate. After shaping, the mandrel is removed to obtain a three-dimensional composite fiber bundle. Three-dimensional composite fiber bundles are inserted into the hollow base layer, and self-locking is achieved by the interference fit between the fiber filaments and the inner wall of the hollow base layer. After cutting, hollow sections are obtained. By axially aligning and connecting the filter section, the hollow section, and the aerosol generation section, an aerosol generating component is obtained. The aerosol generating component is then completely encapsulated with an encapsulation layer to obtain an aerosol generating device.

8. The preparation method according to claim 7, characterized in that, The ultrasonic power of the ultrasonic heat sealing is 700~1300W, the heat sealing temperature is 80~160℃, and the heat sealing time is 0.5~2s.

9. An aerosol generation system, characterized in that, The aerosol generating system includes the aerosol generating device and heating appliance as described in any one of claims 1 to 6.

10. The aerosol generation system according to claim 9, characterized in that, The heating appliance includes: A heating component is used to heat the aerosol generating matrix in the aerosol generator to produce aerosols; A housing for accommodating the heating and control components.

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