Pneumatic switch protection structure for aerosol generation device and aerosol generation device

Abstract

This application relates to the field of aerosol generation technology, specifically to a pneumatic switch protection structure for an aerosol generation device and the aerosol generation device itself. The pneumatic switch protection structure includes a mounting member for installation in the aerosol generation device. The mounting member has a gas guiding cavity and a receiving cavity. The gas guiding cavity communicates with the gas passage of the aerosol generation device, and the receiving cavity accommodates the pneumatic switch. The mounting member includes a thin film portion that isolates the gas guiding cavity and the receiving cavity, which deforms under the action of gas flow within the gas guiding cavity to trigger the pneumatic switch. The pneumatic switch protection structure also includes a protective member disposed in the receiving cavity. The protective member has a mounting cavity, in which the pneumatic switch is disposed. The protective member has a communicating side facing the thin film portion, and the surface of the communicating side has a communicating port communicating with the mounting cavity. A flow-guiding slope is provided around the communicating port to guide leakage away from the communicating port. The thin film portion and the flow-guiding slope effectively protect the pneumatic switch, improving long-term protection.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, specifically to a pneumatic switch protection structure for an aerosol generation device and an aerosol generation device. Background Technology

[0002] Aerosol generating devices are a type of product that uses a heating module to heat an aerosol matrix, causing the matrix to generate aerosols without combustion. Existing aerosol generating devices typically include a pneumatic switch, which senses changes in internal airflow or pressure during operation to trigger the device's startup.

[0003] Pneumatic switches are typically connected to the internal air ducts of the device. During actual use, leaked aerosol matrix or condensate from the aerosol can easily enter the pneumatic switch, causing a series of problems such as reduced sensitivity, self-starting, or even failure. Although some related technologies incorporate protective structures for pneumatic switches, these structures can still fail over long-term use, leading to switch malfunctions. Utility Model Content

[0004] In order to provide effective protection for pneumatic switches and improve long-term protection, this application provides a pneumatic switch protection structure and an aerosol generating device for an aerosol generating device.

[0005] According to a first aspect, one embodiment provides a pneumatic switch protection structure for an aerosol generating device, including a mounting member for installation in the aerosol generating device, the mounting member having an air guiding cavity and a receiving cavity, the air guiding cavity communicating with the air passage of the aerosol generating device, and the receiving cavity for accommodating the pneumatic switch;

[0006] The mounting component includes a thin film portion that isolates the air guide cavity and the receiving cavity, the thin film portion being deformed by the gas flow in the air guide cavity to trigger the pneumatic switch;

[0007] The pneumatic switch protection structure further includes a protective member disposed in the receiving cavity. The protective member has a mounting cavity, and the pneumatic switch is disposed in the mounting cavity. The protective member has a communicating side facing the membrane portion. The surface of the communicating side is provided with a communicating port communicating with the mounting cavity, and a guide slope is provided around the communicating port to guide leakage away from the communicating port.

[0008] In one embodiment, the connecting side has a protrusion that protrudes toward the thin film portion, the protrusion including a conical structure, the connecting port being disposed at the tip of the conical structure, and the side surface of the conical structure forming the flow guiding slope.

[0009] In one embodiment, the protrusion is hollow to form a buffer cavity between the inner wall of the protrusion and the pneumatic switch.

[0010] In one embodiment, a sealing structure is provided between the peripheral wall of the protective member and the cavity sidewall of the mounting cavity.

[0011] In one embodiment, the sidewall of the mounting cavity is fitted to the peripheral wall of the pneumatic switch.

[0012] In one embodiment, the surface of the communicating side and / or the cavity wall of the receiving cavity are provided with a liquid accumulation groove for accommodating leakage.

[0013] In one embodiment, the liquid collection tank is connected to the side of the guide slope away from the communication port, and is used to contain the leakage liquid guided and collected by the guide slope.

[0014] In one embodiment, the edge of the communicating side has a recess, and the recess and the cavity wall of the receiving cavity surround the liquid accumulation groove.

[0015] In one embodiment, the liquid accumulation tank is an annular tank.

[0016] In one embodiment, the thin film portion includes a raised region that protrudes in a direction away from the communicating side, and the communicating port is provided corresponding to the protruding apex of the raised region.

[0017] In one embodiment, the thin film portion includes a recessed region that is recessed toward the direction of the connecting side, the recessed region being disposed around the periphery of the protruding region.

[0018] According to a second aspect, one embodiment provides an aerosol generating apparatus, comprising:

[0019] airway;

[0020] And the pneumatic switch protection structure described in any of the above embodiments, wherein the air guide cavity is connected to the air passage.

[0021] In one embodiment, it further includes:

[0022] The housing has a matrix insertion port for inserting aerosol matrix;

[0023] A heating module includes a support and a heating cup disposed on the support, the heating cup having a heating cavity for containing and heating at least a portion of an aerosol matrix;

[0024] The air passage includes an air inlet passage and an air guide passage. The air inlet passage is disposed within the support, and the air inlet end of the air inlet passage is connected to the substrate insertion port. The air guide passage is disposed at the bottom of the heating cup and is connected to the heating chamber.

[0025] The mounting component is disposed on the side of the bracket away from the substrate insertion port, and the air outlet of the air inlet channel and the air inlet of the air guide channel are connected through the air guide cavity.

[0026] According to the pneumatic switch protection structure of the aerosol generating device in the above embodiment, a thin film portion is provided in the mounting component to isolate the air guiding cavity and the receiving cavity, forming a primary protection structure to prevent leakage liquid from entering the receiving cavity and contaminating the pneumatic switch. Furthermore, a protective component is provided in the receiving cavity to form a secondary protection structure using the guide slope around the connecting port. Even if leakage liquid permeates through the thin film portion and drips onto the surface of the connecting side during prolonged use, it will be guided away from the connecting port by the guide slope, making it less likely to enter the mounting cavity and contaminate the pneumatic switch. The two-stage protection structure effectively protects the pneumatic switch and improves long-term protection. Attached Figure Description

[0027] Figure 1 This is a partial cross-sectional structural schematic diagram of an aerosol generation device according to one embodiment;

[0028] Figure 2 This is a cross-sectional schematic diagram of a pneumatic switch protection structure according to one embodiment;

[0029] Figure 3 This is a three-dimensional structural schematic diagram of a protective component according to one embodiment.

[0030] In the diagram, 10 is the pneumatic switch protective structure; 11 is the mounting component; 111 is the air guide cavity; 112 is the receiving cavity; 113 is the diaphragm part; 1131 is the raised area; 1132 is the recessed area; 12 is the protective component; 120 is the connecting side; 121 is the connecting port; 122 is the guide slope; 123 is the raised part; 1231 is the buffer cavity; 124 is the sealing structure; 125 is the recessed part; 126 is the mounting cavity; and 13 is the liquid accumulation tank.

[0031] 20. Shell; 21. Substrate insertion port;

[0032] 30. Heating module; 31. Bracket; 311. Air intake duct; 32. Heating cup; 321. Heating chamber; 322. Air guide duct;

[0033] 40. Pneumatic switch;

[0034] 50. Airway. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0036] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0037] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0038] Aerosol generators typically include pneumatic switches. These switches sense changes in internal airflow or pressure during operation, triggering the generator to start. The pneumatic switch is usually connected to the internal air ducts of the device. During actual use, leaks of aerosol matrix or condensate from aerosol condensation can easily enter the pneumatic switch, causing reduced sensitivity, self-starting, or even failure. Although some technologies incorporate protective structures for the pneumatic switch, long-term use can still lead to protection failure and subsequent malfunction.

[0039] In this embodiment, a primary protection structure is formed by providing a thin film portion in the mounting component to isolate the air guiding cavity and the receiving cavity, preventing leakage liquid from entering the receiving cavity and contaminating the pneumatic switch. Furthermore, a protective component is provided in the receiving cavity, utilizing the flow-guiding slope around the connecting port to form a secondary protection structure. Even if leakage liquid permeates through the thin film portion and drips onto the surface of the connecting side during prolonged use, it will be guided away from the connecting port by the flow-guiding slope, making it less likely to enter the mounting cavity and contaminate the pneumatic switch. The two-stage protection structure works together to effectively protect the pneumatic switch and improve long-term protection.

[0040] In one embodiment, an aerosol generating apparatus is provided; please refer to [reference needed]. Figures 1 to 3 The aerosol generating device includes a housing 20, a heating module 30, and a pneumatic switch 40. The heating module 30 and the pneumatic switch 40 are disposed in the housing 20. The housing 20 is also provided with an air passage 50, which is connected to the pneumatic switch.

[0041] The heating module 30 is used to heat the aerosol matrix to generate aerosols without combustion. It is understood that the specific type of aerosol matrix is ​​not limited; for example, it can be a liquid aerosol matrix (such as atomizing liquid) or a solid aerosol matrix (such as rod-shaped aerosol products). The following description uses an aerosol generating device for heating a solid aerosol matrix as an example.

[0042] In one embodiment, please refer to Figure 1 The housing 20 has a matrix inlet 21 for inserting the aerosol matrix. The heating module 30 includes a support 31 and a heating cup 32 disposed on the support 31. The heating cup 32 has a heating chamber 321 for containing and heating at least a portion of the aerosol matrix. The air passage 50 includes an inlet air passage 311 and a guide air passage 322. The inlet air passage 311 is disposed within the support 31, and its inlet end communicates with the matrix inlet 21. The guide air passage 322 is disposed at the bottom of the heating cup 32 and communicates with the heating chamber 321. The outlet end of the inlet air passage 311 communicates with the inlet end of the guide air passage 322, so that when the device is in use, air from outside the device can be sequentially drawn into the aerosol matrix inside the heating chamber 321 through the matrix inlet 21, the inlet air passage 311, and the guide air passage 322, mixed with the heated aerosol, and then discharged.

[0043] The pneumatic switch 40 can be located on one side of the air guide channel 322 and communicate with the air guide channel 322, so as to be triggered by changes in airflow within the air guide channel 322 when the device is in use. For example, the pneumatic switch 40 can be located on the side of the heating cup 32 away from the substrate inlet 21, so as to be triggered by airflow entering the air guide channel 322 from the air inlet channel 311.

[0044] Since the pneumatic switch 40 is connected to the air passage 50, during actual use of the device, leaked liquid into the air passage 50 (such as aerosol matrix leakage liquid or aerosol condensate leaking into the air guide passage 3200) may enter the pneumatic switch 40, causing a series of problems such as reduced sensitivity, self-starting, or even failure of the pneumatic switch 40. To address this, a pneumatic switch protection structure 10 can be installed in the aerosol generation device.

[0045] In one embodiment, please refer to Figure 1 and Figure 2 The pneumatic switch protection structure 10 of the aerosol generating device includes a mounting member 11 for installation in the aerosol generating device. The mounting member 11 has a gas guiding chamber 111 and a receiving chamber 112. The mounting member 11 can be disposed on the side of the bracket 31 opposite to the matrix inlet 21 to serve as the base of the bracket 31. The gas guiding chamber 111 communicates with the air passage 50 of the aerosol generating device (e.g., with the outlet end of the inlet air passage 311 and the inlet end of the gas guiding air passage 322). The receiving chamber 112 is used to receive the pneumatic switch 40. The mounting member 11 includes a thin film portion 113 disposed between the gas guiding chamber 111 and the receiving chamber 112. The thin film portion 113 isolates the gas guiding chamber 111 and the receiving chamber 112 and is deformed by the gas flow in the gas guiding chamber 111 to trigger the pneumatic switch 40.

[0046] Mounting component 11 serves as the basic component of the protective structure. It utilizes the air guide cavity 111 to achieve gas communication with the air passage 50, ensuring that the membrane section 113 can be affected by the airflow within the air passage 50. The receiving cavity 112 provides installation space for the pneumatic switch 40, achieving structural integration. The membrane section 113 is made of a deformable elastic material (such as silicone). On the one hand, it isolates the air guide cavity 111 from the receiving cavity 112, preventing leakage from the air passage 50 from directly entering the receiving cavity 112. On the other hand, the membrane section 113 can deform (such as bend) with changes in airflow within the air guide cavity 111. The pneumatic switch 40 is activated by the air pressure difference on both sides of the membrane section 113, thus combining isolation and triggering functions.

[0047] Although the membrane section 113 can prevent leakage from entering the receiving cavity 112, with prolonged use of the device, leakage may penetrate through the membrane section 113 and enter the receiving cavity 112, and there is still a risk of protection failure.

[0048] Therefore, in one embodiment, please refer to Figure 2 and Figure 3The pneumatic switch protection structure 10 also includes a protective member 12 disposed in the receiving cavity 112. The protective member 12 has a mounting cavity 126. The pneumatic switch 40 is disposed in the mounting cavity 126. The protective member 12 has a communicating side 120 facing the diaphragm portion 113. The surface of the communicating side 120 is provided with a communicating port 121 communicating with the mounting cavity 126, and a guide slope 122 is provided on the periphery of the communicating port 121 to guide the leakage away from the communicating port 121.

[0049] The mounting cavity 126 is used to fix the pneumatic switch 40, ensuring its stable position. The connecting port 121 provides a channel for the air pressure change caused by the deformation of the diaphragm 113 to be transmitted to the pneumatic switch 40. The guide slope 122 around the connecting port 121 allows the guide slope 122 to use gravity to guide the leakage away from the connecting port 121 when the leakage penetrates the diaphragm 113 and drips onto the surface of the connecting side 120, thus reducing the probability of leakage entering the mounting cavity 126 from a physical path. The protective component 12 and the diaphragm 113 work together to form a two-level protection, playing a synergistic role and helping to solve the problem of protection failure of the diaphragm 113 after long-term use, thereby improving the long-term protection effect of the pneumatic switch 40.

[0050] For example, please refer to Figure 2 The mounting cavity 126 can be located on the side of the protective member 12 opposite to the air guide cavity 111, and an installation opening is provided in the direction opposite to the air guide cavity 111 for the pneumatic switch 40 to be assembled into the mounting cavity 126. Furthermore, a limiting flange can be provided at the mounting opening to prevent the pneumatic switch 40 from detaching from the mounting cavity 126. The pneumatic switch 40 can be communicatively connected to the control module in the aerosol generating device via a lead wire to activate the aerosol generating device (e.g., to start heating module 30).

[0051] In one embodiment, please refer to Figure 2 The connecting side 120 has a protrusion 123 that protrudes towards the diaphragm portion 113. The protrusion 123 includes a conical structure, with the connecting port 121 located at the tip of the conical structure. The side surface of the conical structure forms a guide slope 122. The protrusion 123 protrudes towards the diaphragm portion 113, which shortens the distance between the connecting port 121 and the diaphragm portion 113, allowing deformation (such as bending) of the diaphragm portion 113 to be transmitted more directly to the connecting port 121, thus improving the trigger sensitivity of the pneumatic switch 40. The design of the conical structure (such as a cone, triangular pyramid, etc.) naturally forms a guide slope 122 on the conical side surface. Due to the inclination angle and height difference of the conical surface, the leaking liquid can be guided to flow quickly towards the bottom of the cone, away from the connecting port 121 at the tip of the cone, making the leakage flow more efficient and reducing the risk of leakage intrusion.

[0052] In one embodiment, please refer to Figure 2The protrusion 123 can be hollow to form a buffer cavity 1231 between the inner wall of the protrusion 123 and the pneumatic switch 40. The air in the buffer cavity 1231 can be more directly affected by the deformation of the diaphragm 113. That is, when the diaphragm 113 bends, the air in the buffer cavity 1231 is compressed or stretched, forming a more obvious airflow or air pressure change, which helps to trigger the pneumatic switch 40 more efficiently, compensates for the weakening of the trigger signal caused by the increase of the protective structure, and improves the response accuracy and response speed.

[0053] In another embodiment not shown, the protrusion 123 can be omitted, and a cavity with an inclined sidewall can be provided on the surface of the connecting side 120. The inclined sidewall of the cavity serves as a flow guide slope 122, which can also increase the difficulty of leakage into the connecting port 121 and improve the protection effect on the pneumatic switch 40.

[0054] It is understood that the protective component 12 can be installed separately from the mounting component 11, or it can be installed as an integral part. For example, please refer to... Figure 2 The protective component 12 can be made of injection molded material. The receiving cavity 112 has an opening on the side opposite to the air guiding cavity 111, and the protective component 12 is installed into the receiving cavity 112 through the opening.

[0055] In one embodiment, please refer to Figure 2 A sealing structure 124 is provided between the peripheral wall of the protective member 12 and the cavity sidewall of the mounting cavity 126. For example, an annular protrusion is provided on the peripheral wall of the protective member 12 to limit further leakage of liquid through the gap between the peripheral wall of the protective member 12 and the cavity sidewall of the receiving cavity 112. Exemplarily, the peripheral wall of the protective member 12 is designed to be an arc shape that perfectly matches the cavity sidewall of the receiving cavity 112 to achieve a tight fit after assembly.

[0056] In a further embodiment, please refer to Figure 2 The sidewall of the mounting cavity 126 can fit against the peripheral wall of the pneumatic switch 40 (e.g., interference fit, tight contact), eliminating any gap between the sidewall of the mounting cavity 126 and the peripheral wall of the pneumatic switch 40. This creates a closed area between the pneumatic switch 40 and the diaphragm portion 113, making it easier for the pressure difference across the diaphragm portion 113 to concentrate on the pneumatic switch 40. In other words, when the diaphragm portion 113 deforms, the pressure change within the closed area is more pronounced, thus reducing pressure loss and ensuring rapid triggering of the pneumatic switch 40. For example, the outer peripheral dimension of the pneumatic switch 40 can be slightly larger than the circumferential dimension of the mounting cavity 126 to achieve a tight fit between the sidewall of the mounting cavity 126 and the peripheral wall of the pneumatic switch 40 through an interference fit.

[0057] It is understandable that any other sealing method can be used between the peripheral wall of the protective component 12 and the side wall of the mounting cavity 126, and between the side wall of the mounting cavity 126 and the peripheral wall of the pneumatic switch 40, as long as it meets the design and usage requirements.

[0058] In one embodiment, please refer to Figure 2 At least one of the surface of the connecting side 120 and the cavity wall of the receiving cavity 112 may be provided with a liquid collection tank 13 for collecting the leaked liquid, so as to supplement the function of the guide slope 122 and form a complete "guide-receive" leak prevention system. This allows the leaked liquid to be guided by the guide slope 122 to a position away from the connecting port 121, and then collected and temporarily stored by the liquid collection tank 13, preventing the leaked liquid from moving around on the surface of the connecting side 120 or in the receiving cavity 112.

[0059] It is understood that the liquid accumulation tank 13 can be set as a capillary tank to use capillary force to lock in the leakage liquid entering it, reduce the risk of leakage liquid flowing into the connecting port 121 in the receiving cavity 112, and further improve the protection effect.

[0060] For example, the liquid collection tank 13 can be set separately on the surface of the connecting side 120 (such as a strip groove along the end of the guide slope 122), or separately on the cavity wall of the receiving cavity 112 (such as an annular groove surrounding the protective member 12), or both can be combined. For example, a shallow groove is provided on the surface of the connecting side 120 to collect the leakage directly guided, and a deep groove is provided on the cavity wall of the receiving cavity 112 to collect the overflow leakage, forming a multi-level protection to further reduce the risk of leakage intrusion.

[0061] In one embodiment, please refer to Figure 2 The liquid collection tank 13 is connected to the side of the guide slope 122 away from the communication port 121, and is used to contain the leakage liquid guided and gathered by the guide slope 122.

[0062] The connection between the liquid collection tank 13 and the guide slope 122 allows the leaked liquid to flow along the guide slope 122 to the end (the end away from the connection port 121) and then directly flow into the liquid collection tank 13, avoiding the formation of a dead corner at the connection point. This helps to improve the efficiency of liquid collection and reduces the possibility of the leaked liquid re-entering the connection port 121 due to residue.

[0063] For example, the height of the end of the guide slope 122 can be level with or slightly higher than the opening of the liquid collection tank 13 to form a natural drainage slope, ensuring that all the leaked liquid flows into the liquid collection tank 13.

[0064] In one embodiment, please refer to Figure 2 and Figure 3The edge of the connecting side 120 has a recess 125, and the recess 125 and the cavity wall of the receiving cavity 112 enclose a liquid accumulation groove 13. Exemplarily, the recess 125 can be designed as an annular groove recessed inward from the edge of the connecting side 120, naturally forming a closed liquid accumulation space during assembly by enclosing it with the cavity side wall of the receiving cavity 112. The recess 125 facilitates the formation of the liquid accumulation groove 13 through the assembly relationship between the protective member 12 and the mounting member 11, eliminating the need for additional machining of a separate groove, thus reducing part machining steps and lowering costs. Furthermore, since the recess 125 is located at the edge of the connecting side 120, it also helps to efficiently collect leakage from the guide slope 122 to the edge.

[0065] It is understood that the liquid collection tank 13 in the above embodiments can all be set as an annular tank, for example, arranged in a 360° annular shape along the surface of the connecting side 120 or the side wall of the receiving cavity 112, so as to achieve all-round liquid collection, so that no matter which direction the liquid flows down through the guide slope 122 (such as the device being tilted and causing the liquid to be biased to one side), the liquid collection tank 13 can intercept and contain it, avoiding collection leakage caused by the uncertainty of the direction of the liquid leakage.

[0066] In one embodiment, please refer to Figure 2 The thin film portion 113 includes a raised region 1131 that protrudes in a direction away from the connecting side 120, and the connecting port 121 is provided corresponding to the apex of the raised region 1131. The design of the raised region 1131 mainly solves the problem of dripping after leakage: when leakage penetrates the thin film portion 113, the arc-shaped surface of the raised region 1131 guides the leakage to flow towards the edge (sliding down the spherical surface due to gravity), reducing the leakage from staying and dripping at the apex of the raised region (corresponding to the connecting port 121); at the same time, the apex of the raised region corresponds to the connecting port 121, so that the deformation of the thin film portion 113 (such as the bending of the apex of the raised region) can directly act on the connecting port 121, which helps to improve the trigger sensitivity.

[0067] In a further embodiment, please refer to Figure 2 The membrane portion 113 may further include a recessed region 1132 that is recessed toward the direction of the connecting side 120, and the recessed region 1132 is disposed on the periphery of the raised region 1131. The recessed region 1132 and the raised region 1131 cooperate to form a "centrally raised, peripherally recessed" structure, causing leaked liquid that has permeated into the membrane portion 113 to first flow along the surface of the raised region 1131 toward the edge, and then be guided by the surface of the recessed region 1132 to the bottom of the recess (near the edge of the membrane portion 113), finally dripping onto the edge region of the connecting side 120 (away from the connecting port 121). This dual-flow guiding design keeps the leaked liquid further away from the connecting port 121 and facilitates efficient treatment by the guiding slope 122 and the collection trough 13 after dripping, helping to further reduce the risk of leaked liquid intrusion.

[0068] Those skilled in the art should understand that the pneumatic switch protection structure 10 in the above embodiments can be applied to any aerosol generating device with an air passage 50, as long as the air passage 50 is connected to the air guide cavity 111. The "air passage 50" includes, but is not limited to, the device's inlet air passage 311, air guide air passage 322, and outlet air passage, as long as the air passage 50 delivers airflow or aerosol through the air guide cavity 111, and the pneumatic switch 40 can sense changes in airflow and trigger the device to operate (such as heating).

[0069] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A pneumatic switch protection structure for an aerosol generating device, characterized in that, Includes a mounting component for installation in the aerosol generating device, the mounting component having an air guide cavity and a receiving cavity, the air guide cavity communicating with the air passage of the aerosol generating device, and the receiving cavity for accommodating the pneumatic switch; The mounting component includes a thin film portion that isolates the air guide cavity and the receiving cavity, the thin film portion being deformed by the gas flow in the air guide cavity to trigger the pneumatic switch; The pneumatic switch protection structure further includes a protective member disposed in the receiving cavity. The protective member has a mounting cavity, and the pneumatic switch is disposed in the mounting cavity. The protective member has a communicating side facing the membrane portion. The surface of the communicating side is provided with a communicating port communicating with the mounting cavity, and a guide slope is provided around the communicating port to guide leakage away from the communicating port.

2. The pneumatic switch protection structure as described in claim 1, characterized in that, The connecting side has a protrusion that protrudes toward the thin film portion. The protrusion includes a conical structure. The connecting port is located at the tip of the conical structure. The side surface of the conical structure forms the flow guiding slope.

3. The pneumatic switch protection structure as described in claim 2, characterized in that, The protrusion is hollow to form a buffer cavity between the inner wall of the protrusion and the pneumatic switch.

4. The pneumatic switch protection structure as described in claim 1, characterized in that, A sealing structure is provided between the peripheral wall of the protective component and the side wall of the mounting cavity.

5. The pneumatic switch protection structure as described in claim 4, characterized in that, The sidewall of the mounting cavity is in contact with the peripheral wall of the pneumatic switch.

6. The pneumatic switch protection structure as described in any one of claims 1 to 4, characterized in that, The surface of the connecting side and / or the cavity wall of the receiving cavity are provided with a liquid accumulation groove for accommodating leakage.

7. The pneumatic switch protection structure as described in claim 6, characterized in that, The liquid collection tank is connected to the side of the guide slope away from the communication port, and is used to contain the leakage liquid that is guided and collected by the guide slope.

8. The pneumatic switch protection structure as described in claim 7, characterized in that, The edge of the connecting side has a recess, and the recess and the cavity wall of the receiving cavity form the liquid accumulation groove.

9. The pneumatic switch protection structure as described in claim 6, characterized in that, The liquid accumulation tank is an annular tank.

10. The pneumatic switch protection structure as described in any one of claims 1 to 4, characterized in that, The thin film portion includes a raised region that protrudes in a direction away from the communicating side, and the communicating port is provided corresponding to the protruding apex of the raised region.

11. The pneumatic switch protection structure as described in claim 10, characterized in that, The thin film portion includes a recessed region that is recessed toward the direction of the connecting side, and the recessed region is disposed on the periphery of the protruding region.

12. An aerosol generating apparatus, characterized in that, include: airway; And the pneumatic switch protection structure as described in any one of claims 1 to 11, wherein the air guide cavity is connected to the air passage.

13. The aerosol generating apparatus as described in claim 12, characterized in that, Also includes: The housing has a matrix insertion port for inserting aerosol matrix; A heating module includes a support and a heating cup disposed on the support, the heating cup having a heating cavity for containing and heating at least a portion of an aerosol matrix; The air passage includes an air inlet passage and an air guide passage. The air inlet passage is disposed within the support, and the air inlet end of the air inlet passage is connected to the substrate insertion port. The air guide passage is disposed at the bottom of the heating cup and is connected to the heating chamber. The mounting component is disposed on the side of the bracket away from the substrate insertion port, and the air outlet of the air inlet channel and the air inlet of the air guide channel are connected through the air guide cavity.

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