Aerosol generating device and system thereof

Abstract

The utility model relates to the technical field of aerosol atomization, and provides an aerosol generating device and a system thereof. The aerosol generating device comprises a containing cavity used for containing an aerosol generating substrate; the heating body assembly comprises a heating part, and an airflow channel is formed in the heating part; wherein a first opening is formed in the bottom of the containing cavity, and the heating part extends into the containing cavity through the first opening so as to be inserted into the aerosol generating substrate, so that the air outlet of the airflow channel is communicated with the interior of the aerosol generating substrate, and the aerosol generating substrate is heated; a sealing element is arranged in the bottom area of the containing cavity, and under the condition that the heating part is inserted into the containing cavity through the first opening, the sealing element is used for preventing gas located outside the containing cavity from entering the containing cavity through a first gap existing between the heating part and the containing cavity, and it is ensured that the aerosol generating matrix in the containing cavity is fully baked through the heating part. The system comprises the device.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol atomization, and particularly relates to an aerosol generating device and a system thereof. Background Art

[0002] At present, the heating element of the existing aerosol generating device is used to be inserted into the inside of the aerosol generating matrix accommodated in the aerosol generating device, so that the air outlet of the air flow channel of the heating element is communicated with the inside of the aerosol generating matrix, and the gas in the air flow channel and the aerosol generating matrix are heated. However, after the heating element is inserted into the accommodating cavity through the opening of the accommodating cavity for accommodating the aerosol generating matrix, there is still an area (such as a gap) in the opening that is not completely covered by the heating element, and the gas with a lower temperature outside the aerosol generating device (such as air, etc.) can easily enter the accommodating cavity for accommodating the aerosol generating matrix from this gap. That is, during the process of the heating element heating the aerosol generating matrix, the gas with a lower temperature will continuously enter the accommodating cavity for accommodating the aerosol generating matrix directly without being heated by the air flow channel of the heating element, and the gas with a lower temperature will flow to various areas in the accommodating cavity and mix with the gas with a higher temperature originally in the accommodating cavity, thereby resulting in insufficient baking of the aerosol generating matrix by the heating element. Summary of the Invention

[0003] The main technical problem to be solved by the utility model is to provide an aerosol generating device and a system thereof. The aerosol generating device can seal the first gap existing between the heating part and the accommodating part in the device, prevent the gas outside the accommodating cavity from entering the accommodating cavity through the first gap, and ensure that the heating part bakes the aerosol generating matrix in the accommodating cavity sufficiently. The system includes the above device.

[0004] According to a first aspect, in one embodiment, an aerosol generating device is provided. The aerosol generating device includes:

[0005] An accommodating cavity for accommodating an aerosol generating matrix;

[0006] A heating element assembly including a heating part, and an air flow channel is provided in the heating part; wherein, a first opening is provided at the bottom of the accommodating cavity, and the heating part extends into the accommodating cavity through the first opening to be inserted into the aerosol generating matrix so that the air outlet of the air flow channel is communicated with the inside of the aerosol generating matrix, and the aerosol generating matrix is heated; wherein, a sealing element is provided in the bottom area of the accommodating cavity, and when the heating part is inserted into the accommodating cavity through the first opening, the sealing element is used to prevent the gas outside the accommodating cavity from entering the accommodating cavity through the first gap existing between the heating part and the accommodating cavity.

[0007] In one embodiment, the aerosol generating device further includes a heating element base for connecting to one end of the heating part outside the accommodation cavity; the accommodation cavity includes an accommodation part; the accommodation part is used for accommodating the aerosol generating matrix; the first opening is located at one end of the accommodation part close to the heating element base; the sealing element is disposed in the first opening to seal the first gap.

[0008] In one embodiment, the aerosol generating device further includes a heating element base for connecting to one end of the heating part outside the accommodation cavity; the accommodation cavity includes an accommodation part and a connecting part; the accommodation part is used for accommodating the aerosol generating matrix; the connecting part is used for connecting to the heating element base, and the connecting part is integrally connected to the accommodation part; the first opening is located in the connecting part; one end of the connecting part close to the heating element base is connected to the heating element base; there is a second gap between one end of the connecting part close to the heating element base and the heating element base; wherein, the sealing element is disposed on a side of the connecting part away from the first opening to prevent gas outside the accommodation cavity from entering the accommodation cavity through the second gap and the first gap by sealing the second gap.

[0009] In one embodiment, the connecting part includes a first connecting sub - part and a second connecting sub - part, the second connecting sub - part is integrally connected to the accommodation part through the first connecting sub - part, and the heating element base is provided with a first groove; wherein, at least part of the second connecting sub - part can extend into the first groove, and the second connecting sub - part is detachably connected to the heating element base through the at least part extending into the first groove; the sealing element is disposed between the second connecting sub - part and the side wall of the first groove.

[0010] In one embodiment, the maximum width of the second connecting sub - part in the radial direction of the heating part is greater than the maximum width of the first connecting sub - part in the radial direction of the heating part.

[0011] In one embodiment, a second groove is provided on the outer peripheral surface of the second connecting sub - part away from the first opening, or a second groove is provided on the side wall of the first groove, and the second groove is used for accommodating the sealing element.

[0012] In one embodiment, the sealing element is an O - ring.

[0013] In one embodiment, the material of the O - ring is silicone.

[0014] In one embodiment, the sealing element is keel glue or a rubber strip.

[0015] According to a second aspect, an aerosol generating system is provided in one embodiment. The aerosol generating system includes:

[0016] an aerosol generating device; the aerosol generating device is the aerosol generating device described in any one of the embodiments herein; an aerosol generating substrate, at least partially disposed in the accommodating cavity.

[0017] The beneficial effects of the present application are:

[0018] The aerosol generating device of the present application includes: an accommodating cavity; a heating element assembly including a heating part with an air flow channel therein; wherein, the bottom of the accommodating cavity has a first opening, and the heating part extends into the accommodating cavity through the first opening to insert into the aerosol generating substrate so that the air outlet of the air flow channel communicates with the inside of the aerosol generating substrate and heats the aerosol generating substrate; wherein, a sealing element is provided in the bottom area of the accommodating cavity, and when the heating part is inserted into the accommodating cavity through the first opening, the sealing element is used to prevent the gas outside the accommodating cavity from entering the accommodating cavity through the first gap existing between the heating part and the accommodating cavity, so as to ensure that the above-mentioned heating part fully bakes the aerosol generating substrate in the accommodating cavity. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of an aerosol generating device according to one embodiment;

[0020] Figure 2 is an enlarged schematic diagram of a first gap and a sealing element according to one embodiment;

[0021] Figure 3 is a schematic structural diagram of an aerosol generating device according to another embodiment;

[0022] Figure 4 is a schematic partial structural diagram of an aerosol generating device according to another embodiment;

[0023] Figure 5 is a schematic structural diagram of a connecting part according to one embodiment; wherein, Figure 5 the area where the dashed box is located is the first groove 31;

[0024] Figure 6 is a top view of the accommodating cavity according to one embodiment. Detailed Embodiments

[0025] The present utility model will be further described in detail below in conjunction with the specific embodiments and the accompanying drawings. Similar elements in different embodiments are denoted by related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0026] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated otherwise that a certain sequence must be followed.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. And the terms "connected" and "coupled" used in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0028] The technical solutions of the present application will be described in detail below in conjunction with the embodiments.

[0029] The present application provides an aerosol generating device. Please refer to Figure 1 and Figure 2 , the aerosol generating device includes:

[0030] A receiving cavity 10 for receiving an aerosol generating substrate (not shown in Figure 1 );

[0031] The heating element assembly 20 includes a heating part 21, and an air flow channel 22 is provided in the heating part 21; wherein, the bottom of the accommodation cavity 10 (such as one end of the accommodation cavity 10 close to the heating part 21) has a first opening 11; the heating part 21 extends into the accommodation cavity 10 through the first opening 11 to be inserted into the aerosol generation substrate so that the air outlet of the air flow channel 22 communicates with the inside of the aerosol generation substrate, and the aerosol generation substrate is heated. When the heating part 21 is inserted into the accommodation cavity 10 through the first opening 11, a sealing element 40 is provided in the bottom area of the accommodation cavity 10 (such as the area of the accommodation cavity 10 close to the heating part 21) to seal the first gap A existing between the heating part 21 and the accommodation cavity 10. That is to say, the sealing element 40 is used to prevent the gas outside the accommodation cavity 10 from entering the accommodation cavity 10 through the first gap A existing between the heating part 21 and the accommodation cavity 10.

[0032] In one embodiment, please refer to Figure 1 , the aerosol generating device further includes a heating element base 30 for connecting to one end of the heating part 21 outside the accommodation cavity 10.

[0033] In one embodiment, the heating element base 30 is detachably connected to one end of the heating part 21 outside the accommodation cavity 10.

[0034] In one embodiment, the number of air outlets of the air flow channel is multiple.

[0035] In one embodiment, at least some of the air outlets are not on the same straight line.

[0036] In one embodiment, the air inlet of the air flow channel can be located at one end of the heating part close to the heating element base. Those skilled in the art can determine the position and number of the air inlets of the air flow channel according to actual needs.

[0037] In one embodiment, the air inlet of the air flow channel can be used to communicate with the outside of the aerosol generating device.

[0038] In one embodiment, the air inlet of the air flow channel can also be used to communicate with other channels to input other required gases into the air flow channel.

[0039] It should be noted that the function of the above "sealing element" is to seal the first gap existing between the heating part and the accommodating part of the accommodation cavity, so as to prevent the gas outside the accommodation cavity (such as air) from entering the accommodation cavity through the first gap, so as to ensure that the above heating part (for example, by first heating the cold air passing through the air flow channel and then heating the aerosol generation substrate in the accommodation cavity with the heated high-temperature gas, and directly heating the aerosol generation substrate in the accommodation cavity by thermal radiation, etc.) fully bakes the aerosol generation substrate in the accommodation cavity.

[0040] It should be noted that those skilled in the art can determine the specific shapes of the accommodation cavity and the first opening according to actual needs. For example, the accommodation cavity can be cylindrical or the like. The first opening can be circular. The first opening can also be cylindrical or the like.

[0041] The aerosol - generating substrate is used to be heated by the heating element assembly to generate aerosol. The specific types of the aerosol - generating substrate are not limited herein.

[0042] In one embodiment, the above - mentioned heating part can heat the aerosol - generating substrate by using a central - needle heating method. Specifically, the heating part is rod - shaped or sheet - shaped. The rod - shaped heating part is a hollow structure to form an air flow channel. Or, the sheet - shaped heating part has a certain thickness to facilitate the formation of an air flow channel.

[0043] In some embodiments, the heating part includes an insulating hollow body and a heating element. The insulating hollow body includes the above - mentioned heating part, and the heating element is disposed on the surface of the heating part and is used to generate heat under the condition of being electrified. Specifically, the insulating hollow body is used to form an air flow channel and is used inside the aerosol - generating substrate; the heating element is disposed on the heating part of the insulating hollow body by means of coating, screen printing, etc., and is used to generate heat under the condition of being electrified to heat the aerosol - generating substrate.

[0044] In some embodiments, the heating part is a conductive hollow body, and the conductive hollow body includes the above - mentioned heating part; the heating part is used to generate heat under the condition of being electrified. Specifically, the conductive hollow body is used to form an air flow channel and is used to connect the inside of the aerosol - generating substrate; the conductive hollow body can generate heat under the condition of being electrified to heat the aerosol - generating substrate.

[0045] In some embodiments, the heating part is a conductive hollow body, and the conductive hollow body includes the above - mentioned heating part; the heating element assembly further includes: an electromagnetic coil disposed around the heating part. Among them, the electromagnetic coil generates an electromagnetic field under the condition of being electrified, and the heating part generates induced heat in the electromagnetic field to heat the aerosol - generating substrate. Among them, the heating part is made of a soft - magnetic material. For example, the heating part can be SUS430 (a model of stainless steel) or SPCE (a steel grade) or the like.

[0046] In some embodiments, the heating element base is used to connect with other components in the aerosol - generating device so that the heating element base is fixed in the aerosol - generating device.

[0047] In some embodiments, one reason for the detachable connection between the heating element base and the end of the heating part outside the accommodation cavity is to make there be a gap in the area where the heating element base is connected to the end of the heating part outside the accommodation cavity. Among them, the purpose of having this gap is to avoid the direct heat transfer between the heating element base and the heating part, which may cause the temperature of the outer shell of the aerosol - generating device to be too high, etc.

[0048] In some embodiments, there is a gap in the region where the base of the heating element is connected to the end of the heating part outside the accommodation cavity. The purpose of having this gap is to prevent direct heat transfer between the base of the heating element and the heating part, which may cause the temperature of the outer shell of the aerosol generating device to be too high, etc.

[0049] In some embodiments, the aerosol generating device further includes a power supply assembly. The power supply assembly can supply power to the heating element assembly, etc.

[0050] In some embodiments, please refer to Figure 1 and Figure 2 , the accommodation cavity 10 only includes the accommodation part 12; wherein, the accommodation part 12 is used to accommodate the aerosol generating matrix; the first opening 11 is located at one end of the accommodation part 12 close to the base of the heating element; the sealing element 40 is arranged in the first opening 11 to seal the first gap A.

[0051] In some embodiments, the distance between the end of the accommodation part close to the base of the heating element and the end of the base of the heating element close to the accommodation part is greater than a preset gap threshold. Those skilled in the art can determine the preset gap threshold according to actual needs. For example, the preset gap threshold can be three millimeters.

[0052] In some embodiments, please refer to Figure 3 and Figure 4 , the accommodation cavity 10 includes the accommodation part 12 and the connecting part 13; wherein, the accommodation part 12 is used to accommodate the aerosol generating matrix; the connecting part 13 is used to connect with the base of the heating element, and the connecting part 13 is integrally connected with the accommodation part 12; the first opening 11 is located in the connecting part 13; wherein, the end of the connecting part 13 close to the base of the heating element 30 is detachably connected to the base of the heating element 30. There is a first gap A between the heating part 21 and the accommodation cavity 10. Please refer to Figure 6 , Figure 6 shows a top view of the accommodation cavity 10 in some embodiments. Through Figure 6 the shape and positional relationship of the accommodation part 12 and the connecting part 13 can be shown; wherein, the accommodation part 12 is in a barrel shape, and the connecting part 13 is integrally connected to one end of the accommodation part 12 close to the base of the heating element; the cross-section of the connecting part 13 along the axial direction of the air flow channel is in an I shape.

[0053] In some embodiments, please refer to Figure 4 , the sealing element 40 is arranged on the side of the connecting part 13 away from the first opening 11. That is to say, the sealing element 40 is not arranged in the first opening 11. There is a second gap B between the end of the connecting part 13 close to the base of the heating element 30 and the base of the heating element 30. By sealing the second gap B, the sealing element 40 can prevent the gas (such as air) outside the accommodation cavity 10 from entering the accommodation cavity 10 through the second gap B and the first gap A.

[0054] In some embodiments, the distance between one end of the accommodating part close to the heating element base and one end of the heating element base close to the accommodating part is greater than a preset clearance threshold. Those skilled in the art can determine the preset clearance threshold according to actual needs. For example, the preset clearance threshold can be three millimeters.

[0055] In some embodiments, please refer to Figure 5 , the connecting part 13 includes a first connecting sub-part 131 and a second connecting sub-part 132. The second connecting sub-part 132 is integrally connected to the accommodating part 10 through the first connecting sub-part 131; the heating element base 30 (such as the area of the heating element base 30 close to the second connecting sub-part 132) is provided with a first groove 31; wherein, at least part of the second connecting sub-part 132 can extend into the first groove 31, and the second connecting sub-part 132 is detachably connected to the heating element base 30 through at least part of the area extending into the first groove 31; the sealing element 40 is arranged between the second connecting sub-part 132 and the side wall of the first groove 31.

[0056] In some embodiments, the first connecting sub-part 131 can be in a circular ring shape. The second connecting sub-part 132 can also be in a circular ring shape.

[0057] In some embodiments, please refer to Figure 5 , the cross-section of the connecting part 13 in the axial direction of the air flow channel can be in an I shape. The first opening 11 is located in the connecting part 13, and the first opening 11 penetrates through the first connecting sub-part 131 and the second connecting sub-part 132. That is to say, the opening penetrating through the first connecting sub-part 131 and the opening of the second connecting sub-part 132 together form the above-mentioned first opening 11. The connecting part 13 and the first opening 11 can also be in other shapes, and no limitation is imposed here.

[0058] In some embodiments, the axial direction of the first opening is the same as the axial direction of the heating part.

[0059] It should be noted that one reason for the second connecting sub-part to be detachably connected to the heating element base through at least part of the area extending into the first groove is to make there be a gap in the area where the heating element base is connected to the accommodating cavity, so as to avoid the direct heat transfer between the heating element base and the accommodating cavity, which may cause the temperature of the outer shell of the aerosol generating device to be too high, etc.

[0060] In some embodiments, please refer to Figure 5 , the maximum width of the second connecting sub-part 132 in the radial direction of the heating part is greater than the maximum width of the first connecting sub-part 131 in the radial direction of the heating part. In some embodiments, the maximum width of the second connecting sub-part 132 in the radial direction of the heating part can also be substantially the same as the maximum width of the first connecting sub-part 131 in the radial direction of the heating part.

[0061] In some embodiments, please refer to Figure 5 , a second groove 1320 is provided on the outer peripheral surface of the second connecting sub - part 132 away from the first opening 11, or a second groove ( Figure 5 not shown) is provided on the side wall of the first groove 31, and the second groove 1320 is used to accommodate the sealing element 40.

[0062] In some embodiments, the surface of the second connecting sub - part on the side close to the first connecting sub - part in the axial direction of the heating part and the surface of the heating element base on the side close to the first connecting sub - part are substantially in the same plane.

[0063] In some embodiments, the second groove is annular. The second groove can also be elliptical or the like.

[0064] In some embodiments, the cross - section of the second groove can be circular, square or rectangular. The cross - section of the second groove can be of other shapes.

[0065] In some embodiments, the orientation of the opening of the second groove is perpendicular or substantially perpendicular to the axial direction of the connecting part.

[0066] In some embodiments, the sealing element has elasticity.

[0067] In some embodiments, the sealing element is a sealing ring.

[0068] In some embodiments, the material of the sealing ring is silica gel. Those skilled in the art can also select sealing rings of other materials according to actual needs.

[0069] In some embodiments, when the sealing element is a sealing ring, the wire diameter of the sealing ring is greater than the sum of the depth of the second groove and the width of the second gap.

[0070] In some embodiments, the sealing element is keel glue or a rubber strip. The sealing element can also be other elements or substances that achieve a sealing effect, such as silica gel, etc.

[0071] It can be seen that in some embodiments, the second gap is sealed by the sealing element to prevent gas (such as air) outside the accommodation cavity from entering the accommodation cavity through the second gap and the first gap, so as to ensure that the above - mentioned heating part (for example, by first heating the cold air passing through the air flow channel and then heating the aerosol - generating substrate in the accommodation cavity with the heated high - temperature gas, and directly heating the aerosol - generating substrate in the accommodation cavity by thermal radiation, etc.) fully bakes the aerosol - generating substrate in the accommodation cavity.

[0072] It can be seen that in some embodiments, please refer to Figure 5, a second groove 1320 for accommodating the sealing element 40 is provided on the outer peripheral surface of the second connecting sub - part 132 away from the first opening 11, which can make the sealing element 40 be at a farther distance from the heating part 21, avoid the high temperature generated by the heating part 21 from being directly transmitted to the sealing element 40, and thus improve the service life of the sealing element 40.

[0073] The above is the description of an aerosol - generating device. In some embodiments of the present application, an aerosol - generating system is also disclosed. The aerosol - generating system includes: an aerosol - generating device; the aerosol - generating device is the aerosol - generating device of any one of the embodiments in the present application; an aerosol - generating substrate, at least partially disposed in the accommodating cavity.

[0074] The above - mentioned aerosol - generating substrate can adopt the existing technologies in the art, so it will not be elaborated here.

[0075] It should be noted that those skilled in the art can determine the positional relationship and connection relationship between the above - mentioned aerosol - generating device and the aerosol - generating substrate according to actual needs. They can also determine the positional relationship and connection relationship between the above - mentioned aerosol - generating device and the aerosol - generating substrate according to the existing technologies, so it will not be elaborated here. Those skilled in the art can also add other components (such as atomizers, etc.), products, and / or structures to the aerosol - generating system according to actual needs.

[0076] This document has been described with reference to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope of this document. For example, various operation steps and the components for performing the operation steps can be implemented in different ways according to a particular application or any number of cost functions associated with the operation of the system (e.g., one or more steps can be deleted, modified, or incorporated into other steps).

[0077] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. Additionally, as understood by those skilled in the art, the principles herein can be reflected in a computer program product on a computer-readable storage medium, which is pre-loaded with computer-readable program code. Any tangible, non-transitory computer-readable storage medium can be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu-ray discs, etc.), flash memories, and / or the like. These computer program instructions can be loaded onto a general-purpose computer, a special-purpose computer, or other programmable data processing devices to form a machine, such that the instructions executed on the computer or other programmable data processing devices can generate a device for implementing the specified functions. These computer program instructions can also be stored in a computer-readable memory, which can direct the computer or other programmable data processing devices to operate in a specific manner, so that the instructions stored in the computer-readable memory can form a manufactured article, including an implementation device for implementing the specified functions. The computer program instructions can also be loaded onto a computer or other programmable data processing devices, thereby performing a series of operation steps on the computer or other programmable devices to generate a computer-implemented process, such that the instructions executed on the computer or other programmable devices can provide steps for implementing the specified functions.

[0078] Although the principles herein have been shown in various embodiments, many modifications of structures, arrangements, proportions, elements, materials, and components that are particularly applicable to specific environments and operational requirements can be used without departing from the principles and scope of this disclosure. The above modifications and other changes or corrections will be included within the scope of this document.

[0079] The foregoing detailed description has been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of this disclosure. Therefore, the consideration of this disclosure will be in an illustrative rather than a restrictive sense, and all such modifications will be included within its scope. Similarly, the advantages, other advantages, and solutions to problems of the various embodiments have been described above. However, benefits, advantages, solutions to problems, and any elements that can produce these, or solutions that make them more explicit, should not be construed as critical, essential, or necessary. The term "comprising" and any other variants used herein are non-exclusive inclusions, such that a process, method, article, or device that includes a list of elements not only includes those elements but also other elements not expressly listed or that do not belong to the process, method, system, article, or device. Additionally, the term "coupled" and any other variants used herein refer to physical connection, electrical connection, magnetic connection, optical connection, communication connection, functional connection, and / or any other connection.

[0080] Those skilled in the art will recognize that many changes may be made to the details of the above-described embodiments without departing from the basic principles of the present utility model. Therefore, the scope of the present utility model should be determined solely by the claims.

Claims

1. An aerosol generating device, characterized in that, Comprising: A receiving cavity for receiving an aerosol - generating substrate; A heating element assembly including a heating part having an air flow channel therein; wherein, a first opening is provided at the bottom of the receiving cavity, and the heating part extends into the receiving cavity through the first opening to be inserted into the aerosol - generating substrate so that the air outlet of the air flow channel communicates with the inside of the aerosol - generating substrate and heats the aerosol - generating substrate; Wherein, a sealing element is provided in the bottom - area of the receiving cavity. When the heating part is inserted into the receiving cavity through the first opening, the sealing element is used to prevent the gas outside the receiving cavity from entering the receiving cavity through a first gap existing between the heating part and the receiving cavity.

2. The aerosol generating device according to claim 1, wherein The aerosol - generating device further includes a heating element base for connecting to one end of the heating part outside the receiving cavity; the receiving cavity includes a receiving part; the receiving part is used to receive the aerosol - generating substrate; the first opening is located at one end of the receiving part close to the heating element base; the sealing element is arranged in the first opening to seal the first gap.

3. The aerosol generating device according to claim 1, characterized in that The aerosol - generating device further includes a heating element base for connecting to one end of the heating part outside the receiving cavity; the receiving cavity includes a receiving part and a connecting part; the receiving part is used to receive the aerosol - generating substrate; the connecting part is used to connect to the heating element base, and the connecting part is integrally connected to the receiving part; the first opening is located in the connecting part; one end of the connecting part close to the heating element base is connected to the heating element base; a second gap exists between one end of the connecting part close to the heating element base and the heating element base; Wherein, the sealing element is arranged on a side of the connecting part away from the first opening to prevent the gas outside the receiving cavity from entering the receiving cavity through the second gap and the first gap by sealing the second gap.

4. The aerosol generating device according to claim 3, characterized in that, The connecting part includes a first connecting sub - part and a second connecting sub - part. The second connecting sub - part is integrally connected to the receiving part through the first connecting sub - part, and the heating element base is provided with a first groove; Wherein, at least a part of the second connecting sub - part can extend into the first groove, and the second connecting sub - part is detachably connected to the heating element base through the at least part extending into the first groove; the sealing element is arranged between the second connecting sub - part and the side wall of the first groove.

5. The aerosol generating device according to claim 4, wherein The maximum width of the second connecting sub - part in the radial direction of the heating part is greater than the maximum width of the first connecting sub - part in the radial direction of the heating part.

6. The aerosol generating device according to claim 5, characterized in that, A second groove is provided on the outer peripheral surface of the second connecting sub - part away from the first opening, or a second groove is provided on the side wall of the first groove. The second groove is used to accommodate the sealing element.

7. The aerosol generating device according to any one of claims 1 to 6, characterized in that, The sealing element is a sealing ring.

8. The aerosol generating device according to claim 7, wherein, The material of the sealing ring is silica gel.

9. The aerosol generating device according to any one of claims 1-6, characterized in that, The sealing element is keel glue or a rubber strip.

10. An aerosol generating system, characterized in that, Comprising: An aerosol - generating device; The aerosol - generating device is the aerosol - generating device as described in claim 9; An aerosol-generating substrate, at least partially disposed within the receiving cavity.

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