Aerosol-generating device

Abstract

The utility model relates to an aerosol generating device which comprises a heating cavity used for containing at least part of an aerosol generating product; the air inlet channel is provided with an air inlet section, a communicating section and an air outlet section which are sequentially communicated from the upstream to the downstream of air flow, the air outlet section is communicated with the heating cavity, and the sectional area of the communicating section is smaller than that of the air inlet section; and the temperature detection element is at least partially arranged on the communication section. According to aerodynamics, airflow entering from the air inlet section can be accelerated to enter the communication section, the heat convection effect can be rapidly improved by increasing the flow speed, in this way, when the high-speed airflow flows through the temperature detection element, the surface temperature of the high-speed airflow can be reduced, and therefore a temperature change signal can be detected, and the control circuit can control the temperature change according to the temperature change detected by the temperature detection element. And the change of the airflow in the communication section is judged, so that the suction change of the user is further reflected.

Description

Technical Field

[0001] This utility model relates to the field of aerosol generation technology, and in particular to an aerosol generation device. Background Technology

[0002] In the field of media atomization, aerosol generating devices use circuit control to bring heating components to a suitable temperature, baking aerosol-generating products (such as tobacco products) to produce inhalable aerosols. The total amount of aerosols produced by a single aerosol-generating product is essentially fixed.

[0003] Most aerosol generators currently lack puff detection functionality, relying primarily on total heating time to terminate the heating process. Since different users have varying puff frequencies, the total number of puffs (inhalations) during the atomization process also differs, leading to incomplete or excessive aerosol release and a burnt taste, negatively impacting user experience. A few aerosol generators employ puff counting technology, primarily using single or multiple sensors (airflow, pressure, etc.) and indirect detection of changes in the electrical parameters of the heating element. However, this approach suffers from poor sensitivity, inaccurate detection, and susceptibility to corrosion from flue gas over prolonged use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved aerosol generating device in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide an aerosol generating device, comprising: a heating chamber for containing at least a portion of the aerosol generating product; an air inlet channel from upstream to downstream of the air flow, the air inlet channel having an air inlet section, a connecting section, and an air outlet section connected in sequence, the air outlet section being connected to the heating chamber, the cross-sectional area of ​​the connecting section being smaller than the cross-sectional area of ​​the air inlet section; and a temperature detection element, the temperature detection element being at least partially disposed in the connecting section.

[0006] In some embodiments, the temperature sensing element is disposed in the connecting section near the air outlet section.

[0007] In some embodiments, the temperature sensing element is a glass-encapsulated NTC thermistor.

[0008] In some embodiments, the temperature sensing element is at least partially disposed at the connection surface between the air intake section and the connecting section.

[0009] In some embodiments, the aerosol generating apparatus further includes an active heating element disposed adjacent to the temperature sensing element.

[0010] In some embodiments, the temperature sensing element and the active heating element are encapsulated together using a corrosion-resistant material.

[0011] In some embodiments, the cross-sectional dimensions of the connecting surface gradually decrease from the air intake section toward the connecting section.

[0012] In some embodiments, the air inlet section, the connecting section, the air outlet section, and the heating chamber are arranged coaxially in sequence.

[0013] In some embodiments, the cross-sectional area of ​​the connecting segment is smaller than the cross-sectional area of ​​the air outlet segment.

[0014] In some embodiments, the cross-sectional area of ​​the air outlet section is adapted to the cross-sectional area of ​​the heating chamber.

[0015] Implementing this utility model has at least the following beneficial effects: the cross-sectional area of ​​the connecting section is smaller than that of the air intake section. According to aerodynamics, the airflow entering from the air intake section will accelerate into the connecting section, and the increased flow velocity will rapidly improve the thermal convection effect. Thus, when the high-speed airflow passes through the temperature detection element, it will lower the surface temperature, thereby detecting the temperature change signal. The control circuit can determine that the airflow in the connecting section has changed based on the temperature change detected by the temperature detection element, thereby further reflecting the user's suction changes. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 This is a longitudinal cross-sectional structural diagram of the aerosol generation system in the first embodiment of this utility model;

[0018] Figure 2 yes Figure 1 A cross-sectional view of a partial structure of the aerosol generation device;

[0019] Figure 3 This is a cross-sectional view of a partial structure of the aerosol generating device in the second embodiment of this utility model. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] The terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, four, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Figures 1 to 2 An aerosol generation system 1 according to a first embodiment of the present invention is shown. The aerosol generation system 1 may include an aerosol generation device 100 and an aerosol generation article 200. The aerosol generation article 200 is movably inserted into the aerosol generation device 100, facilitating removal and replacement with a new aerosol generation article 200 after heating is complete. The aerosol generation device 100 can heat the aerosol generation article 200 inserted therein after being powered on, so as to release the aerosol extract in the aerosol generation article 200 in a non-combustible state.

[0026] In some embodiments, the aerosol generating article 200 may be cylindrical. Of course, in other embodiments, the aerosol generating article 200 may also be elliptical, polygonal, or other cylindrical shapes. The aerosol generating article 200 includes an aerosol generating medium 201, which may include solid materials in the form of strips, flakes, or granules made from the leaves and / or stems of plants (e.g., tobacco or tea leaves), and aroma components may be further added to the solid material.

[0027] The aerosol generating apparatus 100 may include a housing 10 and a heating element 40 disposed within the housing 10. One end of the housing 10 has a socket 120 for inserting an aerosol generating article 200, and the housing 10 has a heating chamber 410 for accommodating at least a portion of the aerosol generating article 200. The shape of the socket 120 is adapted to the cross-sectional shape of the aerosol generating article 200; for example, the socket 120 is circular. Of course, the socket 120 may also be approximately circular or other shapes, as long as it allows the aerosol generating article 200 to pass through.

[0028] At least one air inlet 110 is formed through the outer casing 10, allowing outside air to enter the heating chamber 410. In this embodiment, there are multiple air inlets 110, which are uniformly distributed in an array on the bottom wall of the outer casing 10, facilitating uniform air intake. By providing multiple air inlets 110, even if one or more air inlets 110 are blocked, airflow can still enter through the other air inlets 110. Furthermore, compared to providing a single air inlet, the individual aperture of multiple air inlets 110 is smaller, preventing the entry of debris and the outflow of condensate. Of course, in other embodiments, there may be only one air inlet 110, and / or the air inlet 110 may be located at other positions on the outer casing 10.

[0029] The heating element 40 is used to heat the aerosol generating article 200, which is at least partially inserted into the aerosol generating device 100, after being powered on.

[0030] In some embodiments, the aerosol generating apparatus 100 further includes a battery cell 70 disposed in the housing 10 and a control circuit. The control circuit is electrically connected to both the battery cell 70 and the heating element 40 to control the energization and de-energization between the battery cell 70 and the heating element 40. Furthermore, the control circuit can also control the power supplied by the battery cell 70 to the heating element 40.

[0031] The heating method used by the heating component 40 is not limited. For example, it can be one or more of the following: resistance heating, electromagnetic heating, infrared heating, laser heating, microwave heating, etc.

[0032] The shape of the heating element 40 is not limited; for example, it can be tubular, sheet-like, rod-like, or other shapes. In this embodiment, the heating element 40 includes a heating tube 41, which can be cylindrical, with its inner wall defining at least a portion of the heating cavity 410. Of course, in other embodiments, the heating tube 41 can also be elliptical, polygonal, or other tubular shapes.

[0033] The aerosol generating device 100 also includes an air inlet channel 210, and the heating chamber 410 is connected to at least one air inlet 110 through the air inlet channel 210. When the aerosol generating article 200 is inserted into the heating chamber 410, when the user inhales, the external airflow can enter the bottom of the aerosol generating article 200 along the air inlet channel 210. The aerosol generating medium 201 of the aerosol generating article 200 is heated to generate aerosol, and under the negative pressure of the user's inhalation, the flue gas is inhaled by the user.

[0034] In some embodiments, the aerosol generating device 100 further includes a vent pipe 20 disposed in the housing 10, and the inner wall surface of the vent pipe 20 defines an air inlet channel 210. The material of the vent pipe 20 is not limited; it can be a flexible sealing material such as silicone, or a rigid material such as plastic or ceramic.

[0035] From upstream to downstream of the airflow, the air intake channel 210 includes an air intake section 211, a connecting section 212, and an air outlet section 213 connected in sequence. The air outlet section 213 is connected to the heating chamber 410, and the air intake section 211 is connected to the outside air.

[0036] In some embodiments, the air intake channel 210 may extend in a straight line and may be coaxially arranged with the heating chamber 410, but is not limited to coaxial arrangement. The air intake section 211, the connecting section 212, and the air outlet section 213 may be arranged coaxially from bottom to top. Of course, in other embodiments, the air intake channel 210 may also extend in a non-straight line. For example, the air intake section 211 and the connecting section 212 may be arranged at an angle (e.g., a 90° angle), or the air outlet section 213 and the connecting section 212 may be arranged at an angle (e.g., a 90° angle).

[0037] In some embodiments, the aerosol generating apparatus 100 further includes a temperature sensing element 30, which is at least partially disposed in the connecting section 212 and electrically connected to the control circuit.

[0038] During the user's suction process, the pressure in the connecting section 212 is lower than the pressure in the intake section 211. Air is accelerated from the intake section 211 into the connecting section 212. The high-speed airflow passes over the surface of the temperature detection element 30, and the surface temperature of the temperature detection element 30 decreases. The control circuit can determine that the airflow in the connecting section 212 has changed based on the temperature change detected by the temperature detection element 30, thereby further reflecting the changes in the user's suction.

[0039] According to Bernoulli's principle, flow velocity is inversely proportional to the cross-sectional area of ​​the pipe; that is, as the cross-sectional area of ​​the pipe decreases, the flow velocity increases. Therefore, the airflow velocity can be increased by reducing the cross-sectional area of ​​the pipe. In other words, the cross-sectional area of ​​the connecting section 212 is smaller than that of the inlet section 211, allowing the airflow entering from the inlet section 211 to accelerate into the connecting section 212.

[0040] Preferably, the cross-sectional area of ​​the connecting section 212 needs to be within a suitable range. If the cross-sectional area is too small, it will result in excessive airflow resistance and excessive suction resistance; if the cross-sectional area is too large, it will be difficult to achieve a suitable high-speed airflow, resulting in an insufficient surface temperature range of the temperature sensing element 30. In some embodiments, the cross-sectional area of ​​the connecting section 212 can be 0.1 to 0.65 times the cross-sectional area of ​​the intake section 211. Alternatively, the diameter of the connecting section 212 can be 0.3 to 0.8 times, for example, 0.6 times, the cross-sectional area of ​​the intake section 211.

[0041] When the aerosol generating product 200 is inserted into the aerosol generating device 100, the heating element 40 heats the aerosol generating product 200 to produce smoke. The user's inhalation drives airflow, and the air transports the smoke to the user's mouth. In the entire system, besides the energy heating of the aerosol generating device 100 itself, only the inhalation power of the mouth drives the air. Simultaneously, the changes in these air parameters can reflect the user's inhalation behavior. To accurately reflect changes in the user's inhalation, it is sufficient to accurately detect changes in airflow throughout the process. Parameters characterizing air changes include temperature, pressure, humidity, and flow rate. The only change in air caused by the user's inhalation is the flow rate; therefore, to characterize these changes, measuring the airflow rate is sufficient.

[0042] Common measurement methods include direct measurement, which uses the pressure difference generated by airflow to directly detect changes in airflow velocity. However, the detection element must be directly exposed to the flue gas, which has a certain corrosive ability. Over time, the detection element will be corroded, and the corrosion time is uncertain. This makes it impossible to determine the service life of the detection element, posing a potential risk to product quality, which is detrimental to products that prioritize quality. To improve the lifespan of the detection element, corrosion-resistant materials must be used to isolate the detection element from the flue gas. However, pressure difference detection is inherently difficult to implement in small spaces and with limited dimensions.

[0043] Indirect measurement requires high-speed airflow through a small channel. According to the basic principle of heat transfer, increased flow velocity rapidly enhances heat convection, thereby increasing heat exchange capacity. With heat exchange capacity, there will be rapid temperature changes. If rapid temperature changes can be detected, then changes in airflow can be indirectly reflected, which in turn reflects changes in the user's suction. This forms a complete detection chain: suction—airflow acceleration—temperature change—signal detection—strategy control.

[0044] In this embodiment, a temperature detection element 30 monitors temperature changes in the connecting section 212 and transmits the temperature change signal to the control circuit. The control circuit establishes a relationship between the signal strength and airflow changes, thereby further reflecting the user's suction variations. In this way, the user's habits can be detected, allowing the control strategy to be adjusted in real time to adapt to the user's preferences and provide a better suction experience.

[0045] The temperature sensing element 30 can be an NTC thermistor (negative temperature coefficient thermistor), which is low in cost, has a fast response speed, and can achieve high measurement accuracy. Furthermore, the temperature sensing element 30 can be a glass (quartz) encapsulated NTC thermistor. Glass-encapsulated NTC thermistors have high corrosion resistance, good sealing properties due to the glass material, and precise control of the encapsulation process, ensuring accurate resistance values. Of course, in other embodiments, the structure of the temperature sensing element 30 is not limited. For example, the temperature sensing element 30 can also be a thermocouple or a resistance temperature detector (RTD), or other types of temperature sensors. In addition, the temperature sensing element 30 can also be encapsulated using other corrosion-resistant materials.

[0046] The temperature sensing element 30 has its temperature probe 31 located at least partially within the connecting section 212, allowing the high-speed airflow in the connecting section 212 to flow over the surface of the temperature probe 31, thereby reducing the surface temperature of the temperature probe 31. The lead 32 of the temperature sensing element 30 is located at least partially outside the vent pipe 20 for easy connection to the control circuit.

[0047] The temperature sensing element 30 can be disposed at any position on the connecting section 212. In this embodiment, the temperature sensing element 30 is disposed on the connecting section 212 near the air outlet section 213, for example, at the junction of the connecting section 212 and the air outlet section 213. In this way, the temperature sensing element 30 is close to the heating element 40, and some of the heat from the heating element 40 will be transferred to the temperature sensing element 30, raising the temperature of the temperature sensing element 30. When a high-speed airflow flows over the surface of the temperature sensing element 30, most of the heat will be carried away, and the surface temperature of the temperature sensing element 30 will decrease, thereby detecting the temperature change signal. Then, based on the strength of the signal change, a relationship between the signal and the airflow change is established.

[0048] The lower end of the heating element 41 can be embedded in the upper end of the air outlet section 213 to facilitate the mutual fixation between the heating element 41 and the air outlet section 20. Of course, in other embodiments, the heating element 41 and the air outlet section 213 may only abut against each other at their end faces, or the upper end of the air outlet section 213 may also be embedded in the lower end of the heating element 41.

[0049] The cross-sectional area of ​​the exhaust section 213 can be larger than that of the connecting section 212. Furthermore, the cross-sectional area of ​​the exhaust section 213 can be adapted to the cross-sectional area of ​​the aerosol generating article 200. Specifically, the cross-sectional area of ​​the exhaust section 213 can be equal to, slightly larger than, or slightly smaller than the cross-sectional area of ​​the aerosol generating article 200, and a portion of the aerosol generating article 200 can be inserted into the exhaust section 213 for fixation. Alternatively, the cross-sectional area of ​​the exhaust section 213 can be adapted to the cross-sectional area of ​​the heating chamber 410, and the cross-sectional area of ​​the exhaust section 213 can be equal to, slightly larger than, or slightly smaller than the cross-sectional area of ​​the heating chamber 410.

[0050] A stepped surface 214 is formed at the intersection of the venting section 213 and the connecting section 212. This stepped surface 214 can be used to abut and limit the insertion of the aerosol generating article 200. In some other embodiments, the aerosol generating article 200 may not extend into the venting section 213.

[0051] In some embodiments, the aerosol generating device 100 may further include a heat insulation structure 50 sleeved on the heating tube 41 and an end cap 60 disposed on the end of the heating tube 41 facing the inlet 120.

[0052] The heat insulation structure 50 is made of heat insulation material, for example, the heat insulation structure 50 may include at least one layer of aerogel 51. The heat insulation structure 50 is disposed between the heating element 41 and the outer casing 10, and can effectively reduce the heat transferred from the heating element 41 to the outer casing 10.

[0053] The end cap 60 can be made of a material with low thermal conductivity, such as heat-insulating ceramic, which helps to reduce the heat conducted from the heating element 41 to the outside through the end cap 60. The end cap 60 is cylindrical (e.g., cylindrical) with a through hole 610 formed inside, through which the aerosol generating article 200 can pass and be inserted into the heating element 41.

[0054] The cross-sectional area of ​​the through hole 610 can be larger than the cross-sectional area of ​​the aerosol generating article 200, or the aperture of the through hole 610 can be larger than the outer diameter of the aerosol generating article 200, which facilitates the smooth passage of the aerosol generating article 200 through the through hole 610 and its insertion into the heating tube 41. Of course, in other embodiments, the cross-sectional area of ​​the through hole 610 can also be equal to or slightly smaller than the cross-sectional area of ​​the aerosol generating article 200.

[0055] The end cap 60 can abut against the upper end face of the heating tube 41, or it can be sleeved onto the upper end of the heating tube 41. In this embodiment, the lower end of the end cap 60 is sleeved over the upper end of the heating tube 41. A sealing element 62 can also be provided between the inner wall surface of the end cap 60 and the outer wall surface of the heating tube 41 to ensure the airtightness of the connection between the end cap 60 and the heating tube 41.

[0056] The outer wall surface of the end cap 60 can protrude outward to form a flange 611, and the upper end surface of at least one layer of aerogel 51 can abut against the flange 611. Of course, the upper end surface of at least one layer of aerogel 51 can also directly abut against the lower end surface of the end cap 60 and / or the sealing element 62. Specifically, in this embodiment, the heat insulation structure 50 includes three layers of aerogel 51, which are sequentially sleeved on the heating tube 41. The upper end surface of the innermost layer of aerogel 51 abuts against the lower end surface of the sealing element 62, the upper end surface of the middle layer of aerogel 51 abuts against the lower end surface of the end cap 60, and the upper end surface of the outermost layer of aerogel 51 abuts against the flange 611.

[0057] The upper end face of the end cap 60 can abut against the top wall of the housing 10. Of course, in other embodiments, a portion of the upper end of the end cap 60 may extend outside the housing 10.

[0058] Figure 3 The aerosol generating device 100 of the second embodiment of the present invention is shown. Its main difference from the first embodiment is that the temperature detection element 30 in this embodiment is at least partially disposed at the junction of the air inlet section 211 and the connecting section 212, that is, the temperature detection element 30 is at least partially disposed at the connection surface 216 of the air inlet section 211 and the connecting section 212.

[0059] Because the temperature sensing element 30 is far from the heating element 40, the heat from the heating element 40 is difficult to conduct to the temperature sensing element 30 to raise its temperature. Therefore, the aerosol generating device 100 in this embodiment also includes an active heating element 80, which is disposed adjacent to the temperature sensing element 30. It can raise the temperature of the temperature sensing element 30, for example, to about 80°C, by means of power supply or heat conduction.

[0060] The temperature sensing element 30 and the active heating element 80 can be encapsulated together using a corrosion-resistant material (such as corrosion-resistant silicone), thereby giving both the temperature sensing element 30 and the active heating element 80 high corrosion resistance.

[0061] Temperature sensing element 30 is at least partially disposed at the connection surface 216 between intake section 211 and connecting section 212. Since the cross-sectional area of ​​connecting section 212 is smaller than that of intake section 211, according to aerodynamics, the airflow velocity will increase sharply when the airflow enters the connection surface 216 from intake section 211. As a result, the heat exchange at connection surface 216 will increase rapidly, and the temperature will drop rapidly. The surface temperature of temperature sensing element 30 will decrease, thereby detecting the temperature change signal. Then, based on the strength of the signal change, a relationship with the airflow change is established.

[0062] The connection surface 216 between the intake section 211 and the connecting section 212 can be conical (e.g., conical or quasi-conical). The cross-sectional dimensions (e.g., inner diameter) of the connection surface 216 gradually decrease from the end near the intake section 211 to the end near the connecting section 212, which facilitates smoother airflow into the connecting section 212 and also facilitates the installation of the temperature sensing element 30. Of course, in other embodiments, the connection surface 216 can also be a plane, which can be perpendicular to the axial direction of the intake section 211.

[0063] Furthermore, in this embodiment, the heat insulation structure 50 includes a heat insulation tube 52, which is sleeved on the lower part of the end cap 60, and the upper end face of the heat insulation tube 52 abuts against the flange 611. A cavity 520 is formed between the inner wall surface of the heat insulation tube 52 and the outer wall surface of the heating element 40, and heat insulation is achieved by air. Of course, in other embodiments, the cavity 520 may also be filled with heat insulation materials such as aerogel for heat insulation.

[0064] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An aerosol generating device, characterized in that, include: A heating chamber (410) is used to contain at least a portion of the aerosol-generating article (200); An air intake channel (210) extends from upstream to downstream of the airflow. The air intake channel (210) has an intake section (211), a connecting section (212), and an outlet section (213) connected sequentially. The outlet section (213) is connected to the heating chamber (410). The cross-sectional area of ​​the connecting section (212) is smaller than the cross-sectional area of ​​the intake section (211). Temperature sensing element (30), which is at least partially disposed in the connecting segment (212).

2. The aerosol generating apparatus according to claim 1, characterized in that, The temperature sensing element (30) is located in the connecting section (212) near the air outlet section (213).

3. The aerosol generating apparatus according to claim 2, characterized in that, The temperature sensing element (30) is a glass-encapsulated NTC thermistor.

4. The aerosol generating apparatus according to claim 1, characterized in that, The temperature sensing element (30) is at least partially disposed at the connection surface (216) between the air intake section (211) and the connecting section (212).

5. The aerosol generating apparatus according to claim 4, characterized in that, The aerosol generating device further includes an active heating element (80), which is disposed adjacent to the temperature detection element (30).

6. The aerosol generating apparatus according to claim 5, characterized in that, The temperature sensing element (30) and the active heating element (80) are encapsulated together with a corrosion-resistant material.

7. The aerosol generating apparatus according to claim 4, characterized in that, The cross-sectional dimensions of the connecting surface (216) gradually decrease from the air intake section (211) toward the connecting section (212).

8. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The air inlet section (211), the connecting section (212), the air outlet section (213), and the heating chamber (410) are arranged coaxially in sequence.

9. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The cross-sectional area of ​​the connecting section (212) is smaller than the cross-sectional area of ​​the air outlet section (213).

10. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The cross-sectional area of ​​the air outlet section (213) is adapted to the cross-sectional area of ​​the heating chamber (410).

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