Airflow heating assembly and aerosol generating device

Abstract

According to the airflow heating assembly and the aerosol generating device, a heating body is spirally wound, and the outer diameter of the cross section of the heating body is gradually increased, so that the heating body is gradually close to the wall surface of a heat conducting seat from bottom to top, the surface temperature of the heat conducting seat is in a gradually rising state along the wall surface, and temperature difference exists between gas and the wall surface all the time; the larger the temperature difference is, the higher the heat transfer rate is. The gas can be rapidly heated to the required temperature in the rising process, and the good smoke generation temperature can be achieved more easily. Meanwhile, heat radiation generated by the heating body on the lower layer cannot be blocked by the heating body on the upper layer, so that the utilization rate of the heat radiation can be increased, and the heat of the heating bodies is fully utilized. The aerosol substrate is heated through heat conduction and heat radiation, and on the premise that the heating power is not increased, a good fuming temperature is rapidly reached, so that the aerosol substrate can be sufficiently and timely baked and heated, the smoking taste of smoke is improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to an airflow heating component and an aerosol generating device. Background Art

[0002] In today's tobacco consumption landscape, heat-not-burn (HTB) aerosol-generating devices are gaining popularity and becoming a focal point for research and innovation. These devices utilize a heating element to heat the aerosol matrix within the cigarette, generating an aerosol for the user to inhale. This heating process eliminates combustion and smoke production, allowing users to enjoy the satisfying feeling of smoking tobacco while reducing the production of harmful substances.

[0003] An airflow heating component is a common air heating method. The air is heated by the airflow heating component to form a hot airflow. The hot airflow heats and bakes the aerosol matrix when it flows through it.

[0004] In the related art, it is difficult for the airflow heating component to reach a good smoke-generating temperature, thereby affecting the baking effect of the aerosol matrix, resulting in a poor smoke taste and affecting the user experience. Summary of the Invention

[0005] Based on this, it is necessary to provide an airflow heating component and an aerosol generating device to address the problem of poor aerosol generating effect in existing aerosol generating devices.

[0006] An airflow heating assembly, comprising:

[0007] The heat conducting seat is constructed with a first mounting cavity and a plurality of through holes communicating with the first mounting cavity, wherein the first mounting cavity and the through holes together form a first gas channel for gas circulation;

[0008] a heating element wound in a spiral shape, disposed in the first mounting cavity, the heating element being used to generate heat to heat the gas in the first gas channel;

[0009] Wherein, along the gas flow direction in the first gas channel, the outer diameter of the cross section of the heating element gradually increases.

[0010] In one embodiment, the thermally conductive base is made of quartz glass.

[0011] In one embodiment, the airflow heating assembly further includes a heat insulating member, wherein the heat insulating member is configured with a first accommodating cavity, and the first accommodating cavity is used to accommodate the thermal seat.

[0012] In one embodiment, the inner peripheral wall of the thermal insulation component and the outer peripheral wall of the thermal conductive seat jointly enclose a second gas channel, and the second gas channel is connected to the first gas channel.

[0013] In one embodiment, the heat-conducting seat includes a heat-conducting body and a plurality of protrusions distributed at intervals along the circumference of the heat-conducting body. The protrusions extend radially outward from the outer circumferential surface of the heat-conducting body, and the gap between two adjacent protrusions forms the second gas channel.

[0014] In one embodiment, the thermal insulation element is further configured with a second accommodating cavity, the second accommodating cavity is used to accommodate at least part of the cigarette, and the second accommodating cavity is communicated with the first accommodating cavity.

[0015] In one embodiment, the thermal insulation component includes an inner tube portion and an outer tube portion arranged on the outer peripheral side of the inner tube portion, and the inner tube portion is constructed with the first accommodating cavity and the second accommodating cavity; a cavity is jointly enclosed between the inner tube portion and the outer tube portion, and the cavity is in a vacuum state.

[0016] In one embodiment, the output end of the heating element is connected to a first lead, and the resistance of the first lead is smaller than that of the heating element;

[0017] The input end of the heating element is connected to a second lead wire, and the resistance of the second lead wire is smaller than that of the heating element.

[0018] An airflow heating assembly, comprising:

[0019] The heat conducting seat is constructed with a first mounting cavity and a plurality of through holes communicating with the first mounting cavity, wherein the first mounting cavity and the through holes together form a first gas channel for gas circulation;

[0020] a plurality of heating elements arranged side by side in the first installation cavity, the heating elements being used to generate heat to heat the gas in the first gas channel;

[0021] Wherein, the plurality of heating elements are formed by spirally winding a heating wire.

[0022] An aerosol generating device comprises the airflow heating assembly described above.

[0023] In the aforementioned airflow heating assembly and aerosol generating device, the heating element is spirally wound, and its cross-sectional outer diameter gradually increases along the direction of gas flow within the first gas channel. This causes the heating element to gradually approach the wall of the heat-conducting base from bottom to top, resulting in a gradual increase in the surface temperature of the heat-conducting base along the wall. A temperature difference always exists between the gas and the wall; the greater the temperature difference, the higher the heat transfer rate. Therefore, the gas can be heated to the required temperature more quickly during its ascent, ensuring a good baking effect on the aerosol substrate. Furthermore, the outer diameter of the spirally ascending heating element increases with height, so that the heat radiation generated by the lower layer of heating elements is not blocked by the upper layer of heating elements, thereby increasing the utilization rate of the heat radiation and fully utilizing the heat from the heating elements. By heating the aerosol substrate through both heat conduction and heat radiation, the aerosol substrate is quickly reached to a suitable smoking temperature without increasing the heating power. This ensures that the aerosol substrate is fully and timely baked, improving the smoke taste and, consequently, the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic diagram of an airflow heating assembly provided in one embodiment of the present application.

[0026] Figure 2 for Figure 1 A cross-sectional view of the air flow heating assembly is shown.

[0027] Figure 3 for Figure 2 A partial enlarged view of point A in the air flow heating assembly shown.

[0028] Figure 4 for Figure 3 Schematic diagram of the heating element in the air flow heating assembly shown.

[0029] Figure 5 for Figure 3 Schematic diagram of the thermal seat in the air flow heating assembly shown.

[0030] Figure 6 A schematic diagram of a heating element in an airflow heating assembly provided in another embodiment of the present application.

[0031] Figure numbers: 100, heat-conducting seat; 110, heat-conducting body; 111, first mounting cavity; 112, through hole; 120, protrusion; 200, heating element; 210, first lead; 220, second lead; 300, heat insulation; 310, inner tube; 311, first accommodating cavity; 312, second accommodating cavity; 320, outer tube; 330, cavity; 400, second gas channel; 1000, cigarette. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0038] The aerosol generator plays a central role in e-cigarettes. It heats the aerosol matrix (e.g., e-liquid, tobacco in a cartridge), containing nicotine and other ingredients, and converts it into an aerosol, providing users with an experience similar to smoking a traditional cigarette. The airflow heating assembly is a key component of the aerosol generator. Its function is to heat the airflow directed toward the aerosol matrix. By heating the airflow and utilizing its fluidity, the high-temperature airflow heats the aerosol matrix, ensuring sufficient heat exchange between the airflow and the aerosol matrix, allowing the aerosol matrix to produce a sufficient amount of volatile substances, or aerosol. During this process, the aerosol matrix does not burn and produce smoke, allowing users to enjoy the satisfying feeling of smoking tobacco while reducing the production of harmful substances during smoking.

[0039] The inventors of this application discovered that existing airflow heating assemblies, due to their non-contact heating method, have low preheating efficiency for the cigarette core material. This not only affects the aerosol generation rate, but also the baking effect of the aerosol matrix, resulting in a poor smoke taste, a reduced user experience, and a certain degree of energy waste. Related technologies achieve rapid smoke production by increasing the power of the heating element or using higher-energy heating methods such as lasers or microwaves. However, heating methods such as lasers and microwaves are not suitable for airflow heating assemblies. Simply increasing the power of the heating element will result in high power consumption, which will seriously affect the battery life of the entire device and limit the product's usability and convenience.

[0040] Based on this, an embodiment of the present application provides an airflow heating assembly that can solve the above technical problems. The airflow heating assembly provided in an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0041] See Figures 1 to 3 As shown, an airflow heating assembly provided by an embodiment of the present application includes a heat-conducting seat 100 and a heating element 200 wound in a spiral shape. The heat-conducting seat 100 is constructed with a first installation cavity 111 and a plurality of through holes 112 connected to the first installation cavity 111. The first installation cavity 111 and the through holes 112 together form a first gas channel for gas circulation. The heating element 200 is arranged in the first installation cavity 111 and is used to generate heat to heat the gas in the first gas channel. The outer diameter of the cross section of the heating element 200 gradually increases along the gas flow direction in the first gas channel. Figure 1 As shown, the gas flow direction in the first gas channel is indicated by arrow Z and dotted arrow. It is understandable that in actual use, the gas flow direction can be from bottom to top or slightly inclined, that is, at an angle to the Z direction shown in the figure.

[0042] The above-mentioned airflow heating component, taking the heating element 200 as the heating wire as an example, since the heating wire is spirally wound, the linear heating wire is converted into a three-dimensional form, and a longer heating wire can be arranged in a limited space. Its contact area with the air is significantly increased, thereby achieving efficient heating of the aerosol matrix. The first installation cavity 111, as the space where the heating element 200 is located, is connected with a plurality of through holes 112 to form a gas channel. Such a structure designs a clear and orderly gas flow route. After entering the first installation cavity 111, the gas can fully contact the heating element 200 to obtain heat, and then flow in an orderly manner to the area where the aerosol matrix is located through the through holes 112. Ensuring that the gas flows along a predetermined path makes the heating process more controllable, avoids the problem of uneven heating or failure to effectively reach the aerosol matrix due to turbulent flow of the gas, and ensures the smooth progress of the aerosol generation process.

[0043] The presence of multiple through-holes 112 increases the dispersion of the gas within the first gas channel, allowing the gas to fully contact the heating element 200 from various angles and positions. Furthermore, as the gas passes through the channel, which has a certain length and a complex structure (combining cavities and holes), its residence time within the channel is relatively prolonged. This further enhances the heating effect of the gas, ensuring that the gas can fully absorb the heat generated by the heating element 200. The gas reaches the aerosol matrix at a sufficiently high temperature, which facilitates effective heating of the matrix and improves the amount and quality of aerosol generated.

[0044] As the heating element 200's cross-sectional outer diameter gradually increases along the direction of gas flow within the first gas channel, it gradually approaches the wall of the heat-conducting base 100 from bottom to top, causing the surface temperature of the heat-conducting base 100 to gradually rise along the wall. A temperature difference always exists between the gas and the wall; the greater the temperature difference, the higher the heat transfer rate. Therefore, the gas can be heated to the required temperature more quickly during its ascent, more easily forming high-temperature air and achieving a desired smoke-generating temperature.

[0045] At the same time, the outer diameter of the spirally ascending heating element 200 increases with height, so that the heat radiation generated by the lower layer of heating elements 200 will not be blocked by the upper layer of heating elements 200, thereby increasing the utilization rate of heat radiation and making full use of the heat of the heating element 200. The aerosol matrix is heated by heat conduction and heat radiation, and a good smoking temperature is quickly reached without increasing the heating power, so that the aerosol matrix can be fully and timely baked and heated, improving the smoke taste and further enhancing the user experience. Without increasing the power of the heating element 200, the airflow heating component can fully utilize the heat, ensure the baking effect and baking rate of the aerosol matrix, avoid the high power consumption problem caused by increasing the power of the heating element 200, ensure the endurance of the aerosol generating device, and improve the use time and convenience of the product.

[0046] In some embodiments, the cross-sectional shape of the heating element 200 can be circular or oriented in a direction. It can be understood that the cross-sectional shape of the heating element 200 can be parallel to Figure 1 The horizontal plane in the viewing angle can also be at an angle to the horizontal plane.

[0047] In one embodiment, the heat-conducting seat 100 is made of quartz glass. The heat generated by the heating element 200 can be transferred relatively smoothly to the gas in the first gas channel and the aerosol matrix above it through the heat-conducting seat 100 made of quartz glass. At the same time, the low thermal expansion coefficient of quartz glass prevents it from generating large deformation or stress due to thermal expansion and contraction when heated. Even in frequent heating and cooling cycles, it can maintain structural stability and ensure the stability of the heat transfer path. The stable transfer of heat from the heating element 200 to the gas and then to the aerosol matrix is ensured, so that the gas can be heated continuously and stably, and the aerosol matrix can be evenly and reliably baked and heated, which helps to improve the stability and efficiency of the aerosol generation process and reduce fluctuations in aerosol generation quality caused by unstable heat transfer.

[0048] Quartz glass has a melting point of over 1700°C and can easily withstand the high temperatures generated by the heating element 200 during operation without softening, deforming, or damaging. This high-temperature resistance is crucial for aerosol generating devices that need to operate continuously for long periods of time. It can maintain normal working conditions stably for a long time, eliminating the need for frequent replacement of the thermal base 100, extending the overall service life of the device. It is particularly suitable for scenarios such as industrial production and large-scale scientific research experiments that have high requirements for the continuous operation time of the equipment.

[0049] Quartz glass is virtually inert to acids (except hydrofluoric acid), bases, organic solvents, and most salts. During the aerosol generation process, when the various aerosol matrices and any trace impurities come into contact with the thermal base 100, the quartz glass does not react to produce new chemical substances, thereby preventing contamination of the aerosol components and ensuring the purity of the generated aerosol. Due to its excellent chemical stability, the quartz glass thermal base 100 effectively resists corrosion from corrosive aerosol matrices (such as those formed from solutions containing acidic or alkaline components) or corrosive substances that may be encountered when using the device in special environments, maintaining its structural and performance integrity.

[0050] See Figure 2 and Figure 3As shown, in one embodiment, the airflow heating assembly further includes a heat insulating member 300, which is configured with a first accommodating cavity 311, and the first accommodating cavity 311 is used to accommodate the heat conducting seat 100. The heat insulating member 300 is generally made of a material with a low thermal conductivity coefficient, such as ceramic fiber, aerogel, etc., which can effectively block the conduction of heat. When the heat conducting seat 100 is located in the first accommodating cavity 311 of the heat insulating member 300, the heat insulating member 300 acts like a "heat-insulating cover", preventing the heat conducting seat 100 from emitting excessive heat to the surrounding environment, so that the heat generated by the heating element 200 is used as much as possible to heat the gas in the first gas channel and bake the aerosol matrix, rather than being lost to the external environment. The heat utilization efficiency can be significantly improved, and the energy input required to achieve the target aerosol generation temperature can be reduced. During long-term operation, energy consumption can be reduced, saving operating costs. The energy-saving effect is more obvious, especially for aerosol generating devices that are mass-produced or work continuously for a long time.

[0051] Changes in the external ambient temperature and the heat dissipation generated during the operation of the device itself may affect the temperature of the heat-conducting seat 100 and the internal heating element 200, gas channel, etc., resulting in temperature fluctuations. The thermal insulation 300 can reduce the interference of such external factors and maintain the heat-conducting seat 100 and its surrounding area within a relatively stable temperature range. The stability of the gas heating process is guaranteed, so that the gas flowing through the first gas channel can always bake the aerosol matrix at a relatively stable and appropriate temperature, which helps to generate a more stable and uniform aerosol product and avoid large deviations in key indicators such as aerosol particle size and concentration caused by temperature fluctuations.

[0052] When the aerosol generating device is working, the temperature of the heat-conducting seat 100 and its surrounding areas is relatively high. If there are no heat-insulating measures, the operator may easily come into contact with the high-temperature parts when operating or maintaining the device or there are other objects around the device, resulting in burns and other safety accidents. The presence of the heat-insulating member 300 can greatly reduce the degree of temperature transfer from the surface of the heat-conducting seat 100 to the outside, so that the externally accessible parts of the device remain within a relatively safe temperature range. When the aerosol generating device is working, the temperature of the heat-conducting seat 100 and its surrounding areas is relatively high. If there are no heat-insulating measures, the operator may easily come into contact with the high-temperature parts when operating or maintaining the device or there are other objects around the device, resulting in burns and other safety accidents. The presence of the heat-insulating member 300 can greatly reduce the degree of temperature transfer from the surface of the heat-conducting seat 100 to the outside, so that the externally accessible parts of the device remain within a relatively safe temperature range.

[0053] In addition to the airflow heating assembly, the aerosol generating device also contains other electronic components and mechanical parts. If these components are exposed to high temperatures for extended periods, they may experience performance degradation and accelerated aging. For example, electronic components may short-circuit and fail due to high temperatures, and the material properties of mechanical components may change. The thermal insulation 300 can confine the high-temperature area to the first accommodating cavity 311, reducing the thermal impact on surrounding components. This helps maintain the normal performance of surrounding components, extending their service life, reducing the frequency of equipment maintenance due to high temperatures, ensuring the long-term stable operation of the entire aerosol generating device, and improving the overall reliability and durability of the device.

[0054] See Figure 2 and Figure 3 As shown, in one embodiment, the inner peripheral wall of the thermal insulation 300 and the outer peripheral wall of the thermal seat 100 jointly enclose a second gas channel 400, and the second gas channel 400 is connected to the first gas channel. The existence of the second gas channel 400 provides an additional flow path for the gas, allowing the gas to flow around the thermal seat 100, further making full use of the heat of the thermal seat 100. After the gas flows out of the first gas channel, it can continue to absorb the heat emitted by the thermal seat 100 through the connected second gas channel 400, realizing the "secondary utilization" of the heat, so that the gas can be more fully and comprehensively heated in the entire heating assembly. In this way, the gas can reach a higher temperature, which helps to bake the aerosol matrix more efficiently, increase the aerosol generation rate, and reduce the need to increase the heating power or extend the heating time due to insufficient gas heating.

[0055] Since the gas can circulate in the first gas channel and the second gas channel 400, the heat is distributed more evenly in the gas. Different parts of the gas have the opportunity to contact different areas of the thermal base 100, avoiding the phenomenon of local gas overheating or insufficient heating, and ensuring that the temperature consistency of the entire airflow is better before entering the area where the aerosol matrix is located. When the gas flows in the second gas channel 400, it will take away a portion of the heat transferred from the thermal base 100 to the inner wall of the thermal insulation member 300, avoiding excessive local heat accumulation on the inner wall of the thermal insulation member 300, making the temperature distribution in the thermal insulation member 300 relatively more uniform. This can effectively reduce the thermal stress caused by the large temperature difference between the inside and outside of the thermal insulation member 300, and reduce the risk of damage to the thermal insulation member 300 due to thermal stress.

[0056] See Figure 3 and Figure 5As shown, in one embodiment, the thermal base 100 includes a thermally conductive body 110 and a plurality of protrusions 120 spaced apart along the circumference of the thermally conductive body 110. The protrusions 120 extend radially outward from the outer circumferential surface of the thermally conductive body 110, and the gap between two adjacent protrusions 120 forms a second gas channel 400. It will be understood that the gas flow direction in the second gas channel 400 is parallel or approximately parallel to the gas flow direction in the first gas channel, that is, the gas flow direction is from bottom to top.

[0057] The presence of the raised portions 120 increases the outer surface area of the thermal base 100, allowing the gas to have greater contact with the thermal base 100 as it flows through the second gas channel 400 (i.e., the gaps between adjacent raised portions 120). Compared to a thermal base 100 without raised portions 120 and with a smoother outer surface, this design allows the gas to more fully absorb heat transferred from the thermal base 100, enhancing the heat exchange process. This allows the gas to absorb more heat in a shorter period of time and more efficiently heat it to the desired temperature, thereby accelerating the heating of the aerosol matrix and improving aerosol generation efficiency. The channel structure formed by the spaced-apart raised portions 120 alters the gas flow pattern, creating a more complex and turbulent flow pattern (e.g., vortexes) within the second gas channel 400. This flow pattern helps break down any temperature stratification that may otherwise occur, allowing different portions of the gas to fully contact different areas of the thermal base 100 and ensuring even heat distribution throughout the gas.

[0058] See Figure 3 As shown, in one embodiment, the thermal insulation member 300 is further configured with a second accommodating cavity 312 for accommodating at least a portion of a cigarette 1000. The second accommodating cavity 312 communicates with the first accommodating cavity 311. By connecting the second accommodating cavity 312 with the first accommodating cavity 311, heat generated by the thermal base 100 can be more directly and accurately transferred to the portion of the cigarette 1000 contained within the second accommodating cavity 312 through gas flow and other means. The aerosol matrix within the cigarette 1000 can be more fully heated and heated under the action of appropriate and relatively stable heat, achieving efficient vaporization and forming high-quality aerosol. This helps generate aerosols with more uniform particle size, stable composition, and meeting desired quality requirements, ensuring the effectiveness of the aerosol in subsequent applications (such as smoking experiences and medical inhalation). For example, in the e-cigarette field, it provides users with a mellower and more delicate smoke taste, or in medical inhalation aerosol products, it ensures better dispersion and absorption of drug ingredients.

[0059] The interconnected structural design avoids excessive heat loss during the heat transfer process, allowing heat to be conducted in an orderly manner along a predetermined path from the first accommodating chamber 311 where the heat-conducting seat 100 is located to the second accommodating chamber 312 where the cigarette 1000 is located. As the gas flows within this interconnected chamber system, heat exchange and transfer are continuously carried out, maximizing the use of the heat generated by the heating element 200 to serve aerosol generation, rather than wasting heat in the surrounding environment. This reduces the energy consumption required to achieve the ideal aerosol generation effect, and can effectively save energy costs and improve the energy efficiency of the device for long-term use or large-scale production of aerosol-related products (such as electronic cigarettes, medicinal inhalation aerosols, etc.).

[0060] Since the thermal insulation member 300 can also accommodate at least part of the aerosol matrix of the cigarette 1000, the thermal insulation member 300 can also achieve a thermal insulation effect on the bottom of the cigarette 1000, thereby reducing heat loss at the bottom of the cigarette 1000, allowing the high-temperature air passing through the through hole 112 of the thermal seat 100 to more fully enter the aerosol matrix of the cigarette 1000, thereby reducing hot air loss.

[0061] See Figure 3 As shown, in one embodiment, the thermal insulation member 300 includes an inner tube portion 310 and an outer tube portion 320 disposed on the outer periphery of the inner tube portion 310. The inner tube portion 310 is configured with a first accommodating cavity 311 and a second accommodating cavity 312. A cavity 330 is enclosed between the inner tube portion 310 and the outer tube portion 320, and the cavity 330 is in a vacuum state. This effectively "locks" heat within the first accommodating cavity 311 and the second accommodating cavity 312, allowing as much heat as possible to be used to heat the aerosol matrix within the cigarette 1000 and maintain a suitable operating temperature environment. This reduces the additional energy required to maintain a stable internal temperature and significantly improves the overall thermal efficiency of the device. This thermal insulation property is particularly important for aerosol generating devices that require precise temperature control and are sensitive to heat loss. It ensures the uniformity and stability of the heating of Cigarette 1000, ensures that the generated aerosol is highly consistent in quality and composition, and avoids problems such as uneven heating of the aerosol matrix in Cigarette 1000 and unstable vaporization effect due to changes in external temperature.

[0062] See Figure 3 and Figure 4As shown, in one embodiment, the output end of the heating element 200 is connected to a first lead 210, and the resistance of the first lead 210 is lower than that of the heating element 200; the input end of the heating element 200 is connected to a second lead 220, and the resistance of the second lead 220 is lower than that of the heating element 200. It is understandable that the resistance of the first lead 210 and the second lead 220 are both much lower than that of the heating element 200, and the resistance of the first lead 210 and the resistance of the second lead 220 are different, for example, the resistance of the first lead 210 is slightly greater than the resistance of the second lead 220.

[0063] The heating element 200 and the first lead 210 can be made of different materials. For example, one of the heating element 200 and the first lead 210 can be a metal wire, such as aluminum or silver wire; and the other can be an alloy wire, such as a platinum-rhodium alloy wire and a platinum wire, a nickel-chromium alloy wire and a nickel-silicon alloy wire, or a nickel-chromium-silicon alloy wire and a nickel-silicon alloy wire. The heating element 200 and the first lead 210 can be welded together. When power is supplied, the heating element 200 generates heat to heat the gas. When the voltage supply is stopped, the heating wire and the first lead 210 can function as a thermocouple temperature sensor to measure the temperature of the heating element 200.

[0064] See Figure 3 and Figure 4 As shown in one embodiment, it should be noted that, in one embodiment, the heating element 200 may be a heating wire. Of course, in other embodiments, the heating element 200 may also be other devices capable of generating heat.

[0065] In some preferred embodiments, the cigarette 1000, thermal insulator 300, heating element 200, and heat-conducting base 100 are coaxially arranged. This coaxial arrangement allows for a more regular and orderly heat transfer along the axial direction. Heat generated by the heating element 200 is first conducted and diffused through the heat-conducting base 100. Due to the coaxial structure, the heat is radiated and transferred relatively evenly to the surrounding area. Then, through the gas channels and other structures within the thermal insulator 300, the heat is precisely transferred to the cigarette 1000 at the center. This ensures uniform heating of the aerosol matrix within the cigarette 1000, helping to produce an aerosol with a more uniform particle size and composition distribution, thereby improving the quality of the aerosol product. For example, in e-cigarette use, this can result in a richer and more delicate smoke flavor, eliminating the problem of varying smoke taste caused by uneven localized heating. The coaxial layout reduces heat loss and unnecessary dispersion during heat transfer, allowing the heat generated by the heating element 200 to be directed to the cigarette 1000 to maximize its effectiveness in heating the aerosol matrix.

[0066] In other embodiments, an embodiment of the present application also provides an airflow heating component, including the above-mentioned heat-conducting seat 100. Unlike the aforementioned heating element 200, the outer diameter of the cross section of the heating element 200 is not designed to gradually increase, but at least two heating elements 200 are designed, and at least two heating elements 200 are arranged side by side. Taking the heating element 200 as a heating wire as an example, by changing the winding method of the heating element 200, one heating wire is wound around two or more heating elements 200, so that it has a multi-layer heating effect. While only one heating wire needs to be controlled, the heat field of the heating wire can be expanded, and the wall surface of the heat-conducting seat 100 can be heated more quickly. The gas can absorb enough heat in a shorter time and quickly reach the desired heating temperature, thereby more efficiently baking and heating the aerosol matrix, thereby increasing the aerosol generation rate. The multiple side-by-side heating elements 200 formed by the spirally wound heating wire can distribute heat more evenly in the first gas channel. It helps to generate aerosols with uniform particle size and stable properties, thereby ensuring the quality of the aerosol product. For example, in electronic cigarette applications, the smoke produced can have a more delicate and consistent taste, and there will be no differences in smoke concentration, taste, etc. caused by uneven heating of the gas, thereby improving the user experience.

[0067] Furthermore, an embodiment of the present application also provides an aerosol generating device, comprising the above-mentioned airflow heating assembly. The aerosol generating device can achieve any of the above-mentioned technical effects.

[0068] In some embodiments, an aerosol generating device includes an aerosol substrate, a power supply assembly, and a circuit assembly. The second receiving chamber of the airflow heating assembly is in communication with the outside world, allowing the aerosol substrate to be inserted into the second receiving chamber. The power supply assembly provides alternating current to the airflow heating assembly via the circuit assembly, thereby enabling the airflow heating assembly to heat the aerosol substrate. In one embodiment, the circuit assembly includes an inverter circuit that converts direct current from the power supply assembly into alternating current, and then provides the alternating current to the heating element.

[0069] It is understandable that in some embodiments, the power supply assembly may include multiple batteries, and the multiple batteries are electrically connected in series to increase the voltage of the entire power supply assembly, thereby increasing the power supply voltage to the magnetic heating element.

[0070] In some embodiments, the aerosol generating device further comprises a shell, which is provided with a receiving cavity, and the above-mentioned power supply component, circuit component and airflow heating component are all installed in the receiving cavity.

[0071] One embodiment of the present application further provides an electronic cigarette comprising the aforementioned aerosol generating device. In some embodiments, the electronic cigarette may be a cartridge-type electronic cigarette, wherein the cartridge is removably pluggable into and out of a cigarette holder with a power supply, and the aerosol generating device, such as an atomizer assembly, is installed within the cartridge. In other application scenarios, the electronic cigarette may be an all-in-one electronic cigarette.

[0072] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An airflow heating assembly, characterized in that: The airflow heating component comprises: A heat conducting seat (100) is constructed with a first mounting cavity (111) and a plurality of through holes (112) communicating with the first mounting cavity (111), wherein the first mounting cavity (111) and the through holes (112) together form a first gas channel for gas circulation; a heating element (200) wound in a spiral shape, disposed in the first installation cavity (111), the heating element (200) being used to generate heat to heat the gas in the first gas channel; Wherein, along the gas flow direction in the first gas channel, the outer diameter of the cross section of the heating element (200) gradually increases.

2. The airflow heating assembly according to claim 1, characterized in that: The heat conducting seat (100) is made of quartz glass.

3. The airflow heating assembly according to claim 1, characterized in that: The airflow heating assembly further comprises a heat insulating member (300), wherein the heat insulating member (300) is provided with a first accommodating cavity (311), and the first accommodating cavity (311) is used for accommodating the heat conducting seat (100).

4. The airflow heating assembly according to claim 3, characterized in that: The inner peripheral wall of the heat insulating member (300) and the outer peripheral wall of the heat conducting seat (100) jointly enclose a second gas channel (400), and the second gas channel (400) is in communication with the first gas channel.

5. The airflow heating assembly according to claim 4, characterized in that: The heat-conducting seat (100) comprises a heat-conducting body (110) and a plurality of protrusions (120) distributed at intervals along the circumference of the heat-conducting body (110), wherein the protrusions (120) extend radially outward from the outer peripheral surface of the heat-conducting body (110), and a gap between two adjacent protrusions (120) forms the second gas channel (400).

6. The airflow heating assembly according to claim 3, characterized in that: The heat insulating member (300) is further configured with a second accommodating cavity (312), the second accommodating cavity (312) being used to accommodate at least a portion of the cigarette (1000), and the second accommodating cavity (312) being in communication with the first accommodating cavity (311).

7. The airflow heating assembly according to claim 6, characterized in that: The thermal insulation component (300) comprises an inner tube portion (310) and an outer tube portion (320) arranged on the outer periphery of the inner tube portion (310), wherein the inner tube portion (310) is configured with the first accommodating cavity (311) and the second accommodating cavity (312); a cavity (330) is enclosed between the inner tube portion (310) and the outer tube portion (320), and the cavity (330) is in a vacuum state.

8. The airflow heating assembly according to claim 1, characterized in that: The output end of the heating element (200) is connected to a first lead (210), and the resistance of the first lead (210) is smaller than that of the heating element (200); The input end of the heating element (200) is connected to a second lead (220), and the resistance of the second lead (220) is smaller than that of the heating element (200).

9. An airflow heating assembly, characterized in that: The airflow heating component comprises: A heat conducting seat (100) is constructed with a first mounting cavity (111) and a plurality of through holes (112) communicating with the first mounting cavity (111), wherein the first mounting cavity (111) and the through holes (112) together form a first gas channel for gas circulation; A plurality of heating elements (200) are arranged side by side in the first installation cavity (111), the heating elements (200) being used to generate heat to heat the gas in the first gas channel; Wherein, the plurality of heating elements (200) are formed by spirally winding a heating wire.

10. An aerosol generating device, characterized in that: The invention comprises an air flow heating assembly according to any one of claims 1 to 9.

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