Aerosol-generating device

Abstract

The utility model discloses an aerosol generating device which comprises a heating structure, a resonant cavity is defined by the heating structure, the resonant cavity is provided with an open end for an aerosol generating substrate to be inserted into the resonant cavity, and the heating structure is provided with a microwave feed-in structure. The microwave feed-in structure is used for emitting microwaves into the resonant cavity so as to add the hot aerosol to generate a matrix; the clamping structure is used for clamping the aerosol generating substrate; the electric driving structure is used for driving the clamping structure and adjusting the clamping stroke of the clamping structure on the aerosol generating substrate. When the aerosol generating device is used, the arranged electric driving structure is used for driving the clamping structure and adjusting the clamping stroke of the clamping structure on the aerosol generating substrates, so that the clamping structure can clamp the aerosol generating substrates with different diameters, and the aerosol generating device can adapt to the aerosol generating substrates with different diameters; and the method has good universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic atomization, in particular to an aerosol generating device. BACKGROUND

[0002] Currently, heating type aerosol generating devices (heat-not-burn cigarette appliances) mostly use resistance, infrared, or electromagnetic heating. The aerosol generating device using the above heating methods includes at least one heating element. The device provides power to control the temperature of the heating element. The heat energy is conducted to the aerosol generating substrate by contact heat transfer, so that the aerosol generating substrate reaches a temperature for continuously generating aerosol. However, the aerosol generating device using the above heating method has the following problems: 1. The heat transfer coefficient of the aerosol generating substrate is low, and the ignition point is low, so that the temperature of the heating element cannot be too high, thereby causing a long preheating time required when the aerosol generating device is used; 2. The temperature field of the aerosol generating substrate is not uniform when heated, thereby causing poor consistency of the taste when smoked.

[0003] Therefore, the related technology proposes an aerosol generating device using microwave heating to heat the aerosol generating substrate, which has the advantages of fast heating speed and uniform heating. Specifically, the microwave is fed into a metal cavity (resonant cavity) containing the aerosol generating substrate by using a feeding structure. The polar molecules in the aerosol generating substrate oscillate and generate heat under the action of microwave energy. However, the traditional aerosol generating device using microwave heating can usually only adapt to aerosol generating substrates of a specific diameter, and has poor versatility. UTILITY MODEL CONTENT

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes an aerosol generating device which can adapt to aerosol generating substrates of different diameters, thereby having good versatility.

[0005] The aerosol generating device according to the embodiments of the present application comprises:

[0006] a heating structure, the heating structure defining a resonant cavity, the resonant cavity having an open end for inserting an aerosol generating substrate into the resonant cavity, the heating structure having a microwave feeding structure for emitting microwaves into the resonant cavity to heat the aerosol generating substrate;

[0007] a clamping structure for clamping the aerosol generating substrate; and

[0008] an electrically driven structure for driving the clamping structure and adjusting the clamping stroke of the clamping structure on the aerosol generating substrate.

[0009] According to the aerosol generating device provided by the embodiments of the present application, at least the following beneficial effects are achieved: during use, the clamping structure clamps the aerosol generating substrate accommodated therein, and the microwave feeding structure of the heating structure emits microwave energy of a preset power into the resonant cavity, the microwave energy is coupled into the aerosol generating substrate accommodated therein and heats the aerosol generating substrate, so that the aerosol generating device generates aerosol for a user to smoke. The electrically driven structure is arranged to drive the clamping structure and adjust the clamping stroke of the clamping structure on the aerosol generating substrate, so that the clamping structure can clamp aerosol generating substrates of different diameters, and the aerosol generating device provided by the embodiments of the present application can be adapted to aerosol generating substrates of different diameters, and has good versatility.

[0010] According to some embodiments of the present application, the heating structure comprises an outer conductor, the outer conductor defines the resonant cavity, and the microwave feeding structure is connected to the outer conductor.

[0011] According to some embodiments of the present application, a first sensor for detecting whether the aerosol generating substrate is inserted in place is arranged in the resonant cavity.

[0012] According to some embodiments of the present application, the clamping structure comprises a hollow capsule with elasticity for clamping the aerosol generating substrate, and the electrically driven structure comprises a pump body for inputting a filling medium into the interior of the hollow capsule, the filling medium being used to cause the hollow capsule to swell to clamp the aerosol generating substrate.

[0013] According to some embodiments of the present application, the filling medium is a gaseous medium or a liquid medium.

[0014] According to some embodiments of the present application, the number of the hollow capsules is one, and the hollow capsule is annular to have a clamping passage for the aerosol generating substrate to pass through; or,

[0015] The number of the hollow capsules is multiple, and the multiple hollow capsules are arranged in an annular array to enclose a clamping passage for the aerosol generating substrate to pass through.

[0016] According to some embodiments of the present application, the aerosol generating device further comprises a control device and a feedback device, the feedback device is used to detect the clamping degree of the hollow capsule clamping the aerosol generating substrate, and the control device is used to control the amount of the filling medium input by the pump body into the interior of the hollow capsule in cooperation with the feedback device.

[0017] According to some embodiments of the present application, the hollow capsule has a clamping surface for contacting the aerosol generating substrate, and the feedback device comprises a second sensor arranged on the clamping surface and used to detect pressure.

[0018] According to some embodiments of the present application, the hollow capsule has an input port for inputting the filling medium, and the feedback device comprises a third sensor arranged at the input port for detecting the pressure inside the hollow capsule.

[0019] According to some embodiments of the present application, the clamping structure further comprises a support structure, the hollow capsule has a clamping surface for contacting the aerosol generating substrate, and the support structure is arranged at a side of the hollow capsule opposite to the clamping surface.

[0020] According to some embodiments of the present application, the clamping structure is arranged outside the resonant cavity, the clamping structure is used for clamping the portion of the aerosol generating substrate located outside the resonant cavity, and the support structure is a limiting ring, and the hollow capsule is arranged inside the limiting ring.

[0021] According to some embodiments of the present application, the resonant cavity has a heating zone inside;

[0022] The aerosol generating device further comprises a driving assembly, the driving assembly is used for driving the aerosol generating substrate clamped by the clamping structure to move or rotate relative to the heating zone.

[0023] According to some embodiments of the present application, the heating structure further comprises an inner conductor structure located inside the resonant cavity, the inner conductor structure divides the resonant cavity into a resonant space and a receiving cavity for receiving the aerosol generating substrate, a cavity wall of the receiving cavity is provided with a gap communicating the resonant space and the receiving cavity and extending along a circumferential direction of the receiving cavity, and a region corresponding to the receiving cavity and the gap forms the heating zone.

[0024] The driving assembly is used for driving the clamping structure to move relative to the receiving cavity along an axial direction of the aerosol generating substrate clamped by the clamping structure.

[0025] According to some embodiments of the present application, the driving assembly comprises a driving motor and a transmission assembly, the transmission assembly is connected to an output shaft of the driving motor and acts on the clamping structure, and the transmission assembly is used for converting rotary motion into linear motion.

[0026] According to some embodiments of the present application, the transmission assembly comprises a gear and a rack, the gear is connected to the output shaft of the driving motor, the rack is connected to the limiting ring, and the gear and the rack are engaged with each other.

[0027] According to some embodiments of the present application, the inner conductor structure comprises a first inner conductor and a second inner conductor disposed in the resonant cavity, the resonant cavity having a closed end disposed opposite to the open end, the first inner conductor having a fixed end in ohmic contact with the open end and a free end extending towards the closed end, the second inner conductor having a fixed end in ohmic contact with the closed end and a free end extending towards the open end, the first inner conductor and the second inner conductor enclosing the accommodation cavity, the gap being formed between the free end of the first inner conductor and the free end of the second inner conductor.

[0028] According to some embodiments of the present application, the heating structure further comprises a partition disposed in the accommodation cavity, the partition being configured to block the gap and made of a microwave-transparent material to isolate the resonant space and the accommodation cavity.

[0029] According to some embodiments of the present application, the partition is made of glass, ceramic or plastic.

[0030] According to some embodiments of the present application, the clamping surface is provided with a metal film.

[0031] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is a structural schematic diagram of an aerosol-generating device according to an embodiment of the present application;

[0034] Figure 2 is a structural schematic diagram of an aerosol-generating device according to an embodiment of the present application; Figure 1 is a sectional view of the structure shown in FIG. 1;

[0035] Figure 3 is a structural schematic diagram of an aerosol-generating device according to an embodiment of the present application, when the aerosol-generating device contains an aerosol-generating substrate;

[0036] Figure 4 is a sectional view of the structure shown in FIG. 3; Figure 3

[0037] is a sectional view of the structure shown in FIG. 4; Figure 5

[0038] Figure 6 is a sectional view of the structure shown in FIG. 5; Figure 5

[0039] ​​Reference signs:

[0040] Aerosol generating substrate a, clamping channel b, resonance space c, accommodation cavity d;

[0041] Outer conductor 110, resonance cavity 111, feed-in port 120, slot 130, first inner conductor 140, second inner conductor 150, isolator 160;

[0042] First sensor 200;

[0043] Hollow capsule 310, limiting ring 320;

[0044] Pump body 400, delivery line 410;

[0045] Drive motor 510, gear 520, rack 530. DETAILED DESCRIPTION

[0046] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0047] In the description of the present application, it is understood that if the orientation description is involved, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In the description of the present application, if the words such as several, greater than, less than, more than, above, below, within, etc. appear, wherein the meaning of several is one or more, the meaning of more than two is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number.

[0049] In the description of the present application, if the words such as first, second, etc. appear, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0050] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0051] Reference Figures 1 to 6According to the aerosol generating device of the embodiments of the present application, the heating structure, the clamping structure and the electric drive structure are provided.

[0052] Specifically, the heating structure defines a resonant cavity 111 having an open end for inserting the aerosol generating substrate a into the resonant cavity 111, the heating structure has a microwave feed-in structure for emitting microwaves into the resonant cavity 111 to heat the aerosol generating substrate a, the clamping structure is used to clamp the aerosol generating substrate a, and the electric drive structure is used to drive the clamping structure and adjust the clamping stroke of the clamping structure on the aerosol generating substrate a.

[0053] In use, the clamping structure clamps the contained aerosol generating substrate a, and at the same time, the microwave feed-in structure of the heating structure emits microwave energy of a preset power into the resonant cavity 111, the microwave energy is coupled into the contained aerosol generating substrate a and heats the aerosol generating substrate a, thereby generating aerosol for the user to smoke. The electric drive structure is arranged to drive the clamping structure and adjust the clamping stroke of the clamping structure on the aerosol generating substrate a, so that the clamping structure can clamp aerosol generating substrates a of different diameters, so that the aerosol generating device of the embodiments of the present application can adapt to aerosol generating substrates a of different diameters, and has good versatility.

[0054] In some embodiments, the heating structure includes an outer conductor 110, the outer conductor 110 defines the resonant cavity 111, and the microwave feed-in structure is connected to the outer conductor 110.

[0055] Specifically, the microwave feed-in structure includes a feed-in port 120 connected to the outer conductor 110, and the feed-in port 120 is used to access a radio frequency source, wherein the radio frequency source includes at least one of a radio frequency oscillation circuit, a radio frequency amplification circuit, and a self-excitation circuit.

[0056] Referring to Figure 2 and Figure 4 In some embodiments, a first sensor 200 is arranged in the resonant cavity 111 for detecting whether the aerosol generating substrate a is inserted in place, and when the aerosol generating substrate a is determined to be inserted in place by the first sensor 200, the clamping structure is driven by the electric drive structure to clamp the aerosol generating substrate a. The first sensor 200 is arranged to facilitate better confirmation of the timing of clamping the aerosol generating substrate a.

[0057] In some embodiments, when the aerosol generating substrate a is inserted in place, the user can be prompted to manually turn on the electric drive structure by a prompt structure such as an indicator light, a vibration motor, a buzzer, a loudspeaker, etc.

[0058] In some other embodiments, when the aerosol generating substrate a is inserted into the position, the electrically driven structure can also be automatically turned on by the control device in cooperation with the signal fed back by the first sensor 200.

[0059] Specifically, the first sensor 200 can adopt an infrared sensor, and of course, the first sensor 200 can also adopt a position sensor, such as a contact sensor or a proximity sensor, which is not limited herein.

[0060] Referring to Figures 1 to 6 In some embodiments, the clamping structure includes a hollow capsule 310 with elasticity for clamping the aerosol generating substrate a, and the electrically driven structure includes a pump body 400 for inputting a filling medium into the inside of the hollow capsule 310, the filling medium being used to make the hollow capsule 310 swell to clamp the aerosol generating substrate a. In use, the filling medium is inputted into the inside of the hollow capsule 310 by the pump body 400 to make the hollow capsule 310 swell and clamp the aerosol generating substrate a, and when it is needed to release the clamping of the aerosol generating substrate a, the filling medium in the inside of the hollow capsule 310 can be sucked out by the pump body 400.

[0061] Specifically, the pump body 400 inputs the filling medium into the inside of the hollow capsule 310 through a delivery pipeline 410.

[0062] In some embodiments, the filling medium is a gaseous medium. Specifically, the filling medium is air, and at this time, a storage cavity for storing the filling medium does not need to be additionally provided.

[0063] Of course, the filling medium can also be a non-toxic and harmless gas such as nitrogen, carbon dioxide, inert gas, etc., and at this time, a storage cavity for storing the filling medium needs to be additionally provided.

[0064] It should be noted that in some other embodiments, the filling medium is a liquid medium. Specifically, the filling medium can be water, ethanol, oil, liquid metal, liquid crystal, mixed liquid medium, etc., and at this time, a storage cavity for storing the filling medium can be additionally provided.

[0065] Specifically, the hollow capsule 310 is made of an elastic material such as silica gel, thermoplastic polyurethane (TPU), rubber, etc.

[0066] Specifically, the flow rate of the filling medium inputted into the inside of the hollow capsule 310 by the pump body 400 is 0.1 mL / s-0.3 mL / s, such as 0.1 mL / s, 0.2 mL / s, 0.3 mL / s, etc., so as to ensure that the hollow capsule 310 can stably swell and deform.

[0067] Furthermore, the radial strain of the hollow capsule 310 when holding the aerosol-generated matrix a is ε, where ε = ΔD / D ≤ 0.5, to ensure that the hollow capsule 310 can be reused, i.e., the expansion deformation of the hollow capsule 310 will not exceed the elastic limit of the hollow capsule 310. Here, ΔD is the change in radial dimension, and D is the original radial dimension.

[0068] Reference Figures 1 to 6 In some embodiments, the number of hollow capsules 310 is one, and the hollow capsule 310 is annular so that the hollow capsule 310 has a clamping channel b for the aerosol generation matrix a to pass through, which is simple in structure and easy to assemble.

[0069] It should be noted that in some other embodiments, the number of hollow capsules 310 may also be multiple, and the multiple hollow capsules 310 are distributed in a ring array to enclose and form a clamping channel b for the aerosol generation matrix a to pass through.

[0070] Specifically, the minimum inner diameter of the clamping channel b is 4mm to 7.4mm, for example, 4mm, 7.4mm, 5mm, 6mm, 7mm, etc.

[0071] In some embodiments, the aerosol generating apparatus of this application further includes a control device and a feedback device. The feedback device is used to detect the clamping degree of the hollow capsule 310 when it clamps the aerosol generating matrix a. The control device is used in conjunction with the feedback device to control the amount of filling medium input by the pump body 400 into the hollow capsule 310, thereby controlling the expansion degree of the hollow capsule 310 and thus controlling the clamping force of the hollow capsule 310 on the aerosol generating matrix a. This helps to avoid the problem of deformation or even damage to the aerosol generating matrix a due to excessive clamping force.

[0072] In some embodiments, the hollow capsule 310 has a clamping surface for contacting the aerosol generating matrix a, and the feedback device includes a second sensor (not shown in the figure) disposed on the clamping surface of the hollow capsule 310 for detecting pressure. When the second sensor contacts the aerosol generating matrix a and detects a preset pressure value, the control device controls the pump body 400 to stop inputting the filling medium into the hollow capsule 310.

[0073] When the number of hollow capsules 310 is one (i.e., when the hollow capsule 310 is annular), at least two second sensors are provided at intervals on the clamping surface of the hollow capsule 310.

[0074] In addition, when there are multiple hollow capsules 310, at least two of the clamping surfaces of the hollow capsules 310 are provided with a second sensor.

[0075] Specifically, the second sensor can be a piezoelectric, piezoresistive, or other type of pressure sensor, which is not limited here.

[0076] It should be noted that in some other embodiments, the hollow capsule 310 has an input port for inputting the filling medium, and the feedback device includes a third sensor (not shown in the figure) disposed at the input port of the hollow capsule 310 for detecting the internal pressure of the hollow capsule 310. The sensor determines whether the aerosol generating matrix a is being clamped and the magnitude of the clamping force based on the pressure change inside the hollow capsule 310, thereby controlling the clamping force of the hollow capsule 310 on the aerosol generating matrix a.

[0077] Specifically, when the filling medium is a gaseous medium, the third sensor is a pressure sensor.

[0078] In some embodiments, the clamping structure further includes a support structure. The hollow capsule 310 has a clamping surface for contacting the aerosol generating matrix a. The support structure is disposed on the side of the hollow capsule 310 facing away from the clamping surface of the hollow capsule 310. It can limit the expansion and deformation of the hollow capsule 310 facing away from the aerosol generating matrix a, so that the hollow capsule 310 can preferentially expand and deform toward the aerosol generating matrix a, thereby facilitating more efficient use of the expansion and deformation of the hollow capsule 310 to clamp the aerosol generating matrix a.

[0079] Reference Figures 1 to 4 In some embodiments, the clamping structure is disposed outside the resonant cavity 111. The clamping structure is used to clamp the part of the aerosol generating matrix a located outside the resonant cavity 111, thereby reducing the influence of the clamping structure on the resonant frequency inside the resonant cavity 111, which is beneficial to ensuring the heating effect of the aerosol generating matrix a. The aforementioned support structure is a limiting ring 320, and the hollow capsule 310 is disposed inside the limiting ring 320.

[0080] In some embodiments, the resonant cavity 111 has a heating zone. The aerosol generation device of the present application also includes a driving component, which is used to drive the aerosol generation matrix a held by the clamping structure to move or rotate relative to the heating zone, thereby enabling axial segmented heating or circumferential partitioned heating of the aerosol generation matrix a, which is beneficial to improving the heating effect of the aerosol generation matrix a.

[0081] Reference Figure 2 and Figure 4In some embodiments, the heating structure further includes an inner conductor structure located within the resonant cavity 111. The inner conductor structure divides the resonant cavity 111 into a resonant space c and a receiving cavity d for containing the aerosol generation matrix a. The cavity wall of the receiving cavity d has a slit 130 that connects the resonant space c and the receiving cavity d and extends circumferentially along the receiving cavity d. The area of ​​the receiving cavity d corresponding to the slit 130 forms a heating zone. The driving component is used to drive the clamping structure to move relative to the receiving cavity d along the axial direction of the clamped aerosol generation matrix a, thereby enabling axial segmented heating of the aerosol generation matrix a.

[0082] Reference Figures 1 to 4 In some embodiments, the drive assembly includes a drive motor 510 and a transmission assembly. The transmission assembly is connected to the output shaft of the drive motor 510 and acts on the clamping structure. The transmission assembly is used to convert rotational motion into linear motion. The power output by the drive motor 510 is applied to the clamping structure through the transmission assembly to drive the clamping structure to move. Its structure is simple and easy to implement.

[0083] Reference Figures 1 to 4 In some embodiments, the transmission assembly includes a gear 520 and a rack 530. The gear 520 is connected to the output shaft of the drive motor 510, and the rack 530 is connected to the limiting ring 320. The gear 520 and the rack 530 mesh with each other, and the rotational motion of the output shaft of the drive motor 510 is converted into linear motion through the gear 520 and the rack 530. The transmission is stable and the distance that the drive structure moves each time the aerosol generating matrix a is driven can be controlled by the rotational speed of the output shaft of the drive motor 510 and the tooth pitch of the rack 530.

[0084] It should be noted that in some other embodiments, the transmission component described above may also be a lead screw assembly, which is not limited here.

[0085] It should be noted that in some other embodiments, the driving component includes a linear motor, which directly drives the clamping structure to move. In this case, there is no need to set up the above-mentioned transmission component, which helps to simplify the overall structure and reduce the overall size of the structure.

[0086] It should be noted that in some other embodiments, the drive component may also be an electric actuator or a cylinder, which is not limited here.

[0087] Reference Figure 2 and Figure 4In some embodiments, the aforementioned inner conductor structure includes a first inner conductor 140 and a second inner conductor 150 disposed within a resonant cavity 111. The resonant cavity 111 has a closed end disposed opposite to its open end. The first inner conductor 140 has a fixed end in ohmic contact with the open end of the resonant cavity 111 and a free end extending toward the closed end of the resonant cavity 111. The second inner conductor 150 has a fixed end in ohmic contact with the closed end of the resonant cavity 111 and a free end extending toward the open end of the resonant cavity 111. The first inner conductor 140 and the second inner conductor 150 enclose a receiving cavity d, and a gap 130 is formed between the free ends of the first inner conductor 140 and the second inner conductor 150. In use, the first inner conductor 140 and the second inner conductor 150 can guide the distribution of the electric field, so that the electric field is concentrated at the free ends of the first inner conductor 140 and the second inner conductor 150, thereby improving the heating effect of the aerosol generation matrix a.

[0088] In some other embodiments, the hollow capsule 310 is disposed inside the resonant cavity 111, and the inner wall of the outer conductor 110 forms the aforementioned support structure. The hollow capsule 310 can extend through the gap 130 into the receiving cavity d for containing the aerosol generation matrix a and clamp the aerosol generation matrix a. In this case, there is no need to set up the aforementioned support structure, which is beneficial to reduce the number of parts and achieve miniaturization of the overall structure.

[0089] Reference Figure 2 and Figure 4 In some embodiments, the heating structure described above also includes an isolator 160 located within the receiving cavity d. The isolator 160 is used to seal the gap 130 and is made of a microwave-permeable material to isolate the resonant space c and the receiving cavity d. This helps to prevent aerosols from entering the resonant space c through the gap 130, and further helps to prevent aerosols from forming condensate in the resonant space c and contaminating the outer conductor 110 and the inner conductor structure.

[0090] In some of these embodiments, the spacer 160 is made of glass, ceramic, or plastic.

[0091] In some embodiments, a metal film capable of guiding the distribution of the electric field is provided on the clamping surface of the hollow capsule 310, so that the electric field is concentrated at the clamped aerosol generating matrix a, thereby further improving the heating effect of the aerosol generating matrix a.

[0092] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An aerosol-generating device, characterized by, The aerosol generating device comprises: a heating structure defining a resonant cavity having an open end for insertion of an aerosol generating substrate into the resonant cavity, the heating structure having a microwave feed-in structure for emitting microwaves into the resonant cavity to heat the aerosol generating substrate; a clamping structure for clamping the aerosol generating substrate; and an electrically driven driving structure for driving the clamping structure and adjusting the clamping stroke of the clamping structure on the aerosol generating substrate. The heating structure comprises an outer conductor defining the resonant cavity, and the microwave feed-in structure is connected to the outer conductor.

2. The aerosol-generating device of claim 1, wherein, A first sensor is arranged in the resonant cavity for detecting whether the aerosol generating substrate is inserted in place. 3.The aerosol-generating device of claim 2, wherein, The clamping structure comprises a hollow capsule having elasticity for clamping the aerosol generating substrate, and the electrically driven driving structure comprises a pump body for inputting a filling medium into the interior of the hollow capsule, the filling medium being used to inflate the hollow capsule to clamp the aerosol generating substrate.

4. The aerosol-generating device of claim 2, wherein, The filling medium is a gaseous medium or a liquid medium.

5. The aerosol-generating device of claim 4, wherein, The number of the hollow capsules is one, and the hollow capsule is annular so as to have a clamping passage for the aerosol generating substrate to pass through. 6.The aerosol generating device of claim 4, wherein, Alternatively, The number of the hollow capsules is multiple, and the multiple hollow capsules are arranged in an annular array to enclose a clamping passage for the aerosol generating substrate to pass through. The aerosol generating device further comprises a control device and a feedback device for detecting the clamping degree of the hollow capsule clamping the aerosol generating substrate, and the control device is used in cooperation with the feedback device to control the amount of the filling medium input by the pump body into the interior of the hollow capsule. 7.The aerosol-generating device of claim 4, wherein, The hollow capsule has a clamping surface for contacting the aerosol generating substrate, and the feedback device comprises a second sensor arranged on the clamping surface and used for detecting pressure.

8. The aerosol-generating device of claim 7, wherein, The hollow capsule has an input port for inputting the filling medium, and the feedback device comprises a third sensor arranged at the input port and used for detecting the pressure in the interior of the hollow capsule. 9.The aerosol-generating device of claim 7, wherein, The clamping structure further comprises a support structure, the hollow capsule has a clamping surface for contacting the aerosol generating substrate, and the support structure is arranged on the side of the hollow capsule opposite to the clamping surface. 10.The aerosol-generating device of claim 4, wherein, The clamping structure is arranged outside the resonant cavity, the clamping structure is used for clamping the portion of the aerosol generating substrate located outside the resonant cavity, and the support structure is a limiting ring, and the hollow capsule is arranged inside the limiting ring. 11.The aerosol-generating device of claim 10, wherein, 12. The aerosol generating device according to claim 11, wherein the resonant cavity has a heating zone; the aerosol generating device further comprises a driving assembly for driving the aerosol generating substrate clamped by the clamping structure to move or rotate relative to the heating zone. ​ 13.The aerosol-generating device of claim 12, wherein, The heating structure further comprises an inner conductor structure located in the resonant cavity, the inner conductor structure separates the resonant cavity into a resonant space and a receiving cavity for receiving the aerosol generating substrate, a cavity wall of the receiving cavity is provided with a slit communicating the resonant space and the receiving cavity and extending along a circumferential direction of the receiving cavity, and a region of the receiving cavity corresponding to the slit forms the heating zone. The driving assembly is configured to drive the clamping structure to move along an axial direction of the clamped aerosol generating substrate relative to the receiving cavity.

14. The aerosol-generating device of claim 13, wherein, The driving assembly comprises a driving motor and a transmission assembly, the transmission assembly is connected to an output shaft of the driving motor and acts on the clamping structure, and the transmission assembly is configured to convert a rotary motion into a linear motion. 15.The aerosol-generating device of claim 14, wherein, The transmission assembly comprises a gear and a rack, the gear is connected to the output shaft of the driving motor, the rack is connected to the limiting ring, and the gear and the rack are engaged with each other.

16. The aerosol-generating device of claim 13, wherein, The inner conductor structure comprises a first inner conductor and a second inner conductor arranged in the resonant cavity, the resonant cavity has a closed end arranged opposite to the open end, the first inner conductor has a fixed end in ohmic contact with the open end and a free end extending towards the closed end, the second inner conductor has a fixed end in ohmic contact with the closed end and a free end extending towards the open end, the first inner conductor and the second inner conductor enclose the receiving cavity, and the slit is formed between the free end of the first inner conductor and the free end of the second inner conductor. 17.The aerosol-generating device of claim 13, wherein, The heating structure further comprises a partition located in the receiving cavity, the partition is configured to block the slit and is made of a material that is transparent to microwaves, so as to isolate the resonant space and the receiving cavity.

18. The aerosol-generating device of claim 17, wherein, The partition is made of glass, ceramic or plastic.

19. The aerosol-generating device of any of claims 10 to 18, wherein, A metal film is arranged on the clamping surface. A metal film is arranged on the clamping surface.

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