Aerosol generating device

Abstract

The utility model relates to an aerosol generating device, which comprises an outer conductor unit, an inner conductor unit and an outer conductor unit, at least part of the fixing unit is installed in the cavity, and a containing cavity is defined in the inner side of the fixing unit; the fixing unit is provided with at least part of induction air channels; the air flow sensing unit is communicated with the sensing air passage; and the sealing structure is at least partially arranged on the fixing unit, is positioned on the periphery of the induction air passage, and is in contact with the outer conductor unit and / or the air flow induction unit. According to the aerosol generating device, at least part of the sealing structure is arranged on the outer side wall of the fixing unit and on the periphery of the sensing air channel, and the sealing structure is in contact with the outer conductor unit and / or the airflow sensing unit, so that the overall sealing performance of the aerosol generating device is improved, and the liquid leakage risk is reduced.

Description

Technical Field

[0001] The utility model relates to the field of atomization, in particular to an aerosol generating device. Background Art

[0002] In a heat-not-burn aerosol generating device, the installation position of the air flow sensing device is generally inside the airway of the aerosol generating device. Its working principle is to count the number of puffs by the change of the suction pressure in the airway. Therefore, the installation of the air flow sensing device, the direction and sealing of the airway are very important. If there are design problems, it will affect the working state of the entire aerosol generating device. For example, there will inevitably be condensate residue after the aerosol generation matrix is atomized. If the airway has poor sealing, the condensate will leak, affecting the working of other components and reducing the user experience. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an improved aerosol generating device.

[0004] The technical solution adopted by the utility model to solve its technical problem is: to construct an aerosol generating device, including:

[0005] An outer conductor unit, with a cavity formed inside;

[0006] A fixing unit, at least partially installed in the cavity, with an accommodation cavity defined inside; at least part of an induction airway is provided on the fixing unit;

[0007] An air flow sensing unit, communicated with the induction airway;

[0008] A sealing structure, at least partially provided on the fixing unit, and located on the outer periphery of the induction airway, and in contact with the outer conductor unit and / or the air flow sensing unit.

[0009] In some embodiments, the sealing structure includes a boss protruding from the outer side wall of the fixing unit; the boss extends towards the air flow sensing unit;

[0010] The boss is provided with a first air circulation hole, which is communicated with the accommodation cavity and defines at least part of the induction airway.

[0011] In some embodiments, the sealing structure further includes at least one sealing member, at least part of the sealing member is in contact with the boss; and at least part of it is in contact with the outer conductor unit or the air flow sensing unit;

[0012] The sealing member is provided with a second air circulation hole, and the second air circulation hole is communicated with the first air circulation hole to form part of the induction airway.

[0013] In some embodiments, a receiving groove for receiving at least a part of the seal is formed on the boss.

[0014] In some embodiments, a positioning structure for positioning and installing the seal is provided in the receiving groove.

[0015] In some embodiments, a guiding structure is provided on the boss; the seal is sleeved on the guiding structure;

[0016] The first air flow through hole is formed on the guiding structure.

[0017] In some embodiments, there are two seals, one of the seals is embedded in the boss, and the other seal is sleeved on the outer periphery of the fixing unit and is in close contact with the outer conductor unit.

[0018] In some embodiments, the outer conductor unit includes a first end and a second end opposite to the first end; the cavity is arranged between the first end and the second end; at least a part of the fixing unit penetrates from the first end to the second end;

[0019] The distance from the sealing structure to the first end is less than the distance from the sealing structure to the second end.

[0020] In some embodiments, air guiding columns are provided on the side wall of the outer conductor unit; a part of the induction air channel is formed inside the air guiding columns;

[0021] The air guiding column includes a first port and a second port; the first port is located in the outer conductor unit, and the sealing structure contacts the end face where the first port is located; the air flow induction unit is installed on the air guiding column and is located at the second port.

[0022] In some embodiments, the aerosol generating device further includes an inner conductor unit, at least a part of the inner conductor unit is installed in the cavity and is connected to the outer conductor unit;

[0023] The inner conductor unit includes a radiation structure, and at least a part of the radiation structure penetrates into the receiving cavity.

[0024] Implementing the aerosol generating device of the present utility model has the following beneficial effects: By providing at least a part of the sealing structure on the outer side wall of the fixing unit and on the outer periphery of the induction air channel and bringing the sealing structure into contact with the outer conductor unit and / or the air flow induction unit, the overall sealing performance of the aerosol generating device is increased, and the risk of liquid leakage is reduced. Description of the Drawings

[0025] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0026] Figure 1 is a schematic structural view of the assembly of the aerosol generating device and the aerosol forming substrate in the first embodiment of the present utility model;

[0027] Figure 2 is Figure 1 a cross-sectional view of the aerosol generating device and the aerosol forming substrate after assembly as shown;

[0028] Figure 3 is Figure 2 a schematic structural view of the aerosol generating device as shown;

[0029] Figure 4 is Figure 2 a cross-sectional view of the aerosol generating device as shown;

[0030] Figure 5 is Figure 3 a schematic exploded view of the aerosol generating device as shown;

[0031] Figure 6 is Figure 5 a schematic structural view of the outer conductor unit of the aerosol generating device as shown;

[0032] Figure 7 is Figure 6 a cross-sectional view of the outer conductor unit of the aerosol generating device as shown;

[0033] Figure 8 is Figure 5 a schematic structural view of the fixing unit of the aerosol generating device as shown;

[0034] Figure 9 is Figure 8 a cross-sectional view of the fixing unit as shown;

[0035] Figure 10 is Figure 5 a schematic structural view of the first seal of the aerosol generating device as shown;

[0036] Figure 11 is a cross-sectional view of the aerosol generating device and the aerosol forming substrate after assembly in the second embodiment of the present utility model;

[0037] Figure 12 is Figure 11 a schematic structural view of the fixing unit of the aerosol generating device as shown;

[0038] Figure 13 is Figure 11 a schematic structural view of the second seal of the aerosol generating device as shown;

[0039] Figure 14It is a sectional view after the assembly of the aerosol generating device and the aerosol forming substrate in the third embodiment of the present utility model;

[0040] Figure 15 is Figure 14 a schematic structural view of the fixing unit of the aerosol generating device shown;

[0041] Figure 16 is Figure 14 a schematic structural view of the first seal of the aerosol generating device shown;

[0042] Figure 17 It is a sectional view after the assembly of the aerosol generating device and the aerosol forming substrate in the fourth embodiment of the present utility model;

[0043] Figure 18 is Figure 17 a schematic structural view of the fixing unit of the aerosol generating device shown. Detailed implementation manners

[0044] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "upper", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, with a specific orientation structure and operation, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0045] It should also be noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. Terms such as "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] Figure 1 and Figure 2The first embodiment of the aerosol generating device of the present utility model is shown. The aerosol generating device 100 can heat the aerosol generating substrate 200 assembled thereon by feeding in microwaves, and generate an aerosol for the user to inhale. The aerosol generating substrate 200 can be detachably arranged in the aerosol generating device 100. In some embodiments, the aerosol generating substrate 200 can be generally cylindrical, and can be a solid material in the form of filaments, granules or flakes made of the leaves, flowers and / or stems of plants, and fragrance components can be further added to the solid material.

[0047] As Figures 1 to 5 shown, in this embodiment, the aerosol generating device 100 can include an outer conductor unit 10, an inner conductor unit 20, and a fixing unit 30. The outer conductor unit 10 can accommodate at least part of the inner conductor unit 20 and at least part of the fixing unit 30 therein. The inner conductor unit 20 can be at least partially installed in the outer conductor unit 10 and connected to the outer conductor unit 10. The inner conductor unit 20 can partially extend into the fixing unit 30, and then can cooperate with the outer conductor unit 10 to generate an aerosol by feeding in microwaves to heat the aerosol generating substrate 200 fixed in the fixing unit 30. The fixing unit 30 can be used to fix the aerosol generating substrate 200.

[0048] As Figures 6 to 7 shown, in this embodiment, the outer conductor unit 10 is processed from a metal material or other highly conductive material. Exemplarily, the outer conductor unit 10 can be made of gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, stainless steel, etc., or the outer conductor unit includes a matrix layer made of a non-metallic material and a metal coating coated on the inner surface of the matrix layer. In this embodiment, the outer conductor unit 10 can be processed from an aluminum alloy.

[0049] In this embodiment, the outer conductor unit 10 is generally cylindrical, having a first end 10a and a second end 10b, where the first end 10a is an open end and the second end 10b can be a closed end. The first end 10a and the second end 10b can be oppositely arranged. The inside of the outer conductor unit 10 is hollowly arranged, and a cavity 110 can be formed inside it.

[0050] Specifically, the outer conductor unit 10 can include a cylinder body 11. The cross-section of the cylinder body 11 is generally circular, and the first end 10a and the second end 10b are the two ends of the cylinder body 11. The cavity 110 is formed in the cylinder body 11 and is located between the first end 10a and the second end 10b. The cavity 110 can be a columnar cavity and can be used to accommodate the fixing unit 30 and the inner conductor unit 20. The second end 10b has an end wall 111, and a through hole 1111 is provided on the end wall 111. The through hole 1111 can be used for installing the inner conductor unit 20.

[0051] In this embodiment, the outer conductor unit 10 further includes a gas guide column 12. The gas guide column 12 is disposed on the outer sidewall of the outer conductor unit 10, that is, on the outer sidewall of the cylinder 11, and extends radially outward of the cylinder 11 and is disposed near the first end 10a. The cross-section of the gas guide column 12 can be substantially circular. In some embodiments, the gas guide column 12 is a structure with both ends penetrating, and a partial induction air channel 60 is formed inside it. In some embodiments, the gas guide column 12 may include a first port 12a and a second port 12b. The first port 12a is located in the outer conductor unit 10 and communicates with the cavity 110, and further communicates with the fixing unit 30. Specifically, it can be opened on the cylinder wall of the cylinder 11. The second port 12b communicates with the first port 12a.

[0052] In this embodiment, the outer conductor unit 10 further includes a mounting convex portion 13. The mounting convex portion 13 protrudes from the outer sidewall of the cylinder 11 and is connected to the end wall 111. An installation through hole 131 communicating with the cavity 110 is provided inside the mounting convex portion 13, and the installation through hole 131 can be used for installing the microwave feeding unit 70.

[0053] As Figure 4 and Figure 5 shown, in this embodiment, the inner conductor unit 20 can be made of a metal material or other highly conductive materials, such as gold, silver, copper, aluminum, iron, gold-containing alloy, aluminum-containing alloy, copper-containing alloy, iron-containing alloy, or stainless steel, etc. In some other embodiments, the inner conductor unit 20 may include a non-metal matrix and a metal coating coated on the non-metal matrix, such as stainless steel plated with gold.

[0054] In this embodiment, the inner conductor unit 20 is at least partially installed in the cavity 110 and is connected to the end wall 111 of the outer conductor unit 10. In some embodiments, the inner conductor unit 20 may include a radiation structure 21 and an impedance matching structure 22. The radiation structure 21 at least partially penetrates into the fixing unit 30 and is used to feed microwaves to the aerosol generating substrate 200 fixed in the fixing unit 30. Specifically, in this embodiment, the radiation structure 21 may be generally columnar or needle-shaped and may be inserted on the impedance matching structure 22. The impedance matching structure 22 may include a first portion 221 and a second portion 222. The first portion 221 may be generally disc-shaped. The second portion 222 may be generally columnar. The second portion 222 is disposed on one side of the first portion 221 and may be coaxially disposed with the first portion 221. The radial dimension of the second portion 222 is smaller than the radial dimension of the first portion 221. The second portion 222 may be disposed on the end wall 111 and in contact with the end wall 221 to form an ohmic contact to ensure the normal feeding of microwaves. A plugging through hole 2221 may be provided on the second portion 222, and a part of the microwave feeding unit 70 may be inserted into the plugging through hole 2221, thereby realizing the connection between the microwave feeding unit 70 and the inner conductor unit 20. A connecting portion 2222 is provided at one end of the second portion 222 away from the first portion 221. The connecting portion 2222 may be helically columnar and may penetrate out from the through hole 1111. In this embodiment, the impedance matching structure 22 further includes a fixing hole 223. The fixing hole 223 may penetrate from the first portion 221 to the second portion 222. The fixing hole 223 may be located at the central axis of the first portion 221 and the second portion 222 and may be used for the insertion and fixation of the radiation structure 21.

[0055] Referring together to Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 , in this embodiment, the fixing unit 30 is at least partially disposed in the cavity 110. The fixing unit 30 may at least partially penetrate from the first end 10a to the second end 10b and is located on the first portion 221 of the impedance matching structure 22. The fixing unit 30 may be coaxially disposed with the impedance matching structure 22. The fixing unit 30 is a hollow structure, and an accommodating cavity 31 may be defined inside. The accommodating cavity 31 may be used to accommodate at least a part of the aerosol generating substrate 200. The radiation structure 21 may partially penetrate into the accommodating cavity 31 and may be located at the central axis of the accommodating cavity 31.

[0056] In this embodiment, the fixing unit 30 may be made of a lossless or low-loss dielectric material. Exemplarily, the fixing unit 30 is made of plastic, Teflon, PEEK, quartz, alumina ceramic, various composite wave-transparent materials, etc.

[0057] In this embodiment, the fixing unit 30 has a cylindrical structure with an assembly port 31b at one end, and includes a fixing portion 30a and a limiting portion 30b. The cross-section of the fixing portion 30a is generally circular, and its radial dimension is smaller than the radial dimension of the cylinder 11 of the outer conductor unit 10. The fixing portion 30a has a hollow structure. The limiting portion 30b is disposed at one end of the fixing portion 30a, and is generally annular. The outer diameter of the limiting portion 30b can be greater than or equal to the inner diameter of the cylinder 11 of the outer conductor unit 10, and it can be placed at the first end 10a of the cylinder 11, thereby realizing the limit installation of the fixing unit 30 and the outer conductor unit 10.

[0058] In this embodiment, the accommodating cavity 31 is formed on the fixing portion 30a and the limiting portion 30b. The accommodating cavity 31 is a columnar cavity. A support wall 31a is provided at the end of the fixing unit 30 away from the assembly port 31b. The support wall 31a is used to support the aerosol generating matrix 200, and at least two support bosses 31c can be spaced apart thereon. In some embodiments, the fixing unit 30 is provided with an air guiding groove 34 on its inner wall. The air guiding groove 34 can extend along the axial direction of the fixing unit 30, and can extend from its assembly port 31b to the support wall 31a, that is, the air guiding groove 34 can form part of the air inlet channel. Other external air can enter the bottom of the aerosol generating matrix 200 through the air guiding groove 34, and then can carry out the aerosol generated by the aerosol generating matrix 200.

[0059] In this embodiment, the fixing unit 30 further includes a positioning portion 33. The positioning portion 33 is disposed on the outer wall of the fixing portion 30a and protrudes toward the inner wall of the outer conductor unit 10. The positioning portion 33 can be disposed close to the limiting portion 30b. It can be matched with the inner wall of the outer conductor unit 10 for positioning, or with a positioning hole opened on the inner wall of the outer conductor unit 10 for positioning, and can play a role in enhancing the interference seal between the sealing structure 50 and the inner wall of the outer conductor unit 10.

[0060] In this embodiment, the aerosol generating device further includes an air flow sensing unit 40. The air flow sensing unit 40 is disposed on the air guiding column 12, and is specifically installed at the second port 12b of the air guiding column 12. The air flow sensing unit can be a microphone or a MEMS sensor. The air flow sensing unit can count the number of suction mouths according to the change of the air pressure of airway suction. The air flow sensing unit 40 can include a substrate 41 and a sleeve 42. An air flow sensing element can be disposed on the substrate 41. The sleeve 42 is fixed on one side of the substrate 41 and can be sleeved on the air guiding column 12.

[0061] In this embodiment, the aerosol generating device further includes a sensing air passage 60, and at least a part of the sensing air passage 60 is disposed on the fixing unit 30. Specifically, in some embodiments, a part of the sensing air passage 60 can be disposed on the fixing unit 30, and a part is formed in the air guiding column 12. The air flow sensing unit 40 can communicate with the sensing air passage 60, and thus can sense the change in the suction negative pressure in the sensing air passage 60, and further can calculate the number of suction puffs, and accurately control the temperature of microwave heating according to different numbers of suction puffs, so as to achieve a better taste.

[0062] As Figure 2 , Figure 4 , Figure 5 and Figure 10 shown, in this embodiment, the aerosol generating device further includes a sealing structure 50. At least a part of the sealing structure 50 is disposed on the fixing unit 30, located on the outer periphery of the sensing air passage 60, and is in close contact with the outer conductor unit 10 and / or the air flow sensing unit 40. Specifically, the distance from the sealing structure 50 to the first end 10a is less than the distance from the sealing structure 50 to the second end 10b. That is, the sealing structure 50 is disposed close to the first end 10a, effectively reducing the condensation of the aerosol generated by the aerosol generation matrix 200 in the sensing air passage 60 during the suction process. The sealing structure 50 can be disposed on the side of the fixing portion 30a opposite to the air guiding column 12, and is in close contact with the inner wall of the outer conductor unit 10, specifically in close contact with the end face of the first port 12a in the outer conductor unit 10. By providing the sealing structure 50, the overall sealing performance of the aerosol generating device can be improved, especially the sealing performance at the connection with the air flow sensing unit 40, and the risk of liquid leakage can be reduced.

[0063] In this embodiment, the sealing structure 50 may include a boss 32 and at least one seal 51. The boss 32 protrudes from the outer side wall of the fixing unit 30, and is specifically disposed on the part where the fixing portion 30a and the limiting portion 30b are connected. In some embodiments, the boss 32 and the fixing portion 30a are an integrally formed structure. The boss 32 can extend toward the air flow sensing unit 40, that is, can extend toward the end face of the first port 12a of the air guiding column 12. In this embodiment, the boss 32 can be in the shape of a cuboid, and can be symmetrically arranged in a straight line with the positioning portion 33, that is, the two are located on the same diameter. In this embodiment, the seal 51 can be embedded in the boss 32, and is in close contact with the inner wall of the boss 32 and at least a part of the outer conductor unit 10. In some embodiments, the seal 51 can also be in close contact with the air flow sensing unit 40.

[0064] In this embodiment, a first air flow through hole 320 may be formed in the boss 32. The first air flow through hole 320 is disposed at the central axis of the boss 32 and communicates with the accommodation cavity 31, and may define a part of the induction air passage 60. Specifically, in this embodiment, a guiding structure 321 may be provided at the central axis of the boss 32. The guiding structure 321 may be a convex column, and the first air flow through hole 320 may be formed in the guiding structure 321. The guiding structure 321 can be used for guiding the installation of the seal 51. In this embodiment, the boss 32 is provided with an accommodation groove 322. The accommodation groove 322 is formed on the outer periphery of the guiding structure 321 and may be an annular groove for accommodating at least a part of the seal 51 therein. In this embodiment, a positioning structure 323 is formed on the boss 32. The positioning structure 323 is located on the inner wall of the accommodation groove 322 and can be used for positioning and installing with the seal 51. The positioning structure 323 may be a notch formed on the inner wall of the accommodation groove 322.

[0065] In this embodiment, there may be one seal 51. The seal 51 includes a first seal 51a. The first seal 51a may be partially embedded and installed in the accommodation groove 322 and sleeved on the outer periphery of the guiding structure 321. In this embodiment, the first seal 51a may include a sealing sleeve 511. The shape and size of the sealing sleeve 511 may be equivalent to those of the accommodation groove 322. One end face of the sealing sleeve 511 may be in close contact with the bottom surface of the accommodation groove 322, and the other end face may be in close contact with the inner wall of the outer conductor unit 10 provided with the air guiding column 12. In this embodiment, a second air flow through hole 512 is formed in the seal 51. The second air flow through hole 512 can communicate with the first air flow through hole 320 and the air guiding column 12 to form a part of the induction air passage 60. Through the guiding of the guiding structure 321, it can be ensured that the first air flow through hole 320 communicates with the second air flow through hole 512. In addition, when gluing and fixing the first seal 51a in the accommodation groove 322, it can prevent the glue from overflowing into the first air flow through hole 320 or the second air flow through hole 512, and prevent the first air flow through hole 320 or the second air flow through hole 512 from being blocked. The end face of the first seal 51a facing the inner wall of the outer conductor unit 10 may be a non-planar structure, such as a partially convex arc surface, which is in close fit with the outer conductor unit 10 at a specific angle to enhance the sealing. In some embodiments, positioning protrusions 513 are provided on the side wall of the first seal 51a. The positioning protrusions 513 can cooperate with the positioning structure 323 for positioning, so as to realize the positioning installation of the first seal 51a and make the first seal 51a in close fit with the inner wall surface of the outer conductor unit 10 to form a good seal. In some embodiments, the first seal 51a may be a silica gel gasket, which can be in interference sealing with the inner wall of the outer conductor unit 10 under the action of the boss 32 and the positioning portion 33. In addition, through the cooperation of the boss 32 and the positioning portion 33, it can be avoided that the first seal 51a expands at high temperature, resulting in the installation position of the fixing unit 30 shifting and the sealing effect deteriorating.

[0066] In this embodiment, by providing the sealing structure 50, the channel cavity area between the induction air duct 60 and the airflow induction unit 40 can be greatly increased, thereby improving the response speed of the MEMS sensor and avoiding liquid leakage.

[0067] In this embodiment, the aerosol generating device further includes a microwave feeding unit 70, which is installed in the installation through hole 131, extends into the cavity 110, and is inserted into the insertion through hole 2221 of the inner conductor unit 20.

[0068] Figures 11 to 13 The second embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the accommodation groove 322 and the guiding structure 321 can be omitted. The seal 51 may include a second seal 51b, which may be a sleeve structure, sleeved on the outer periphery of the fixing portion 30a of the fixing unit 30, placed on the impedance matching structure 22 of the inner conductor unit 20, and in close contact with the boss 32 and the inner wall of the outer conductor unit 10. The second air flow through hole 512 is opened on the side wall of the second seal 51b. The second seal 51b may be in interference fit with the radiation structure 21 and the outer conductor unit 10, and the radiation structure 21 may pass through the second seal 51b. The second seal 51b may be in interference fit with the boss 32. In some embodiments, the second seal 51b may be a silicone sleeve.

[0069] Figures 14 to 16 The third embodiment of the aerosol generating device of the present invention is shown. The difference from the first embodiment is that the guiding structure 321 and the positioning structure 323 can be omitted. There are two seals 51. One of them can be embedded in the boss 32, and the other can be sleeved on the outer periphery of the fixing unit 30 and be in close contact with the outer conductor unit 10. Specifically, the seal 51 may include a first seal 51a and a second seal 51b; the first seal 51a may be cylindrical and can be embedded in the boss 32. The second seal 51b is a sleeve structure, sleeved on the outer periphery of the first seal 51a, sleeved on the outer periphery of the fixing portion 30a of the fixing unit 30, placed on the impedance matching structure 22 of the inner conductor unit 20, and in close contact with the first seal 51a and the inner wall of the outer conductor unit 10. Second air flow through holes 512 are provided on both the first seal 51a and the second seal 51b, and the second air flow through holes 512 of the two are communicated with each other.

[0070] Figure 17 and Figure 18The fourth embodiment of the aerosol generating device of the present utility model is shown. The difference from the second embodiment is that the first seal 51a can be omitted. The limiting portion 30b can be set to a higher height. The boss 32 of the sealing structure 50 can be disposed on the limiting portion 30b. The airflow sensing unit 40 can be directly sleeved on the outer periphery of the boss 32 and be in close contact with the boss 32.

[0071] It can be understood that the above embodiments only express the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the patent of the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, and these all belong to the protection scope of the present utility model; therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. An aerosol generating device, characterized in that, Comprising: An outer conductor unit (10) with a cavity (110) formed inside; A fixing unit (30), at least partially installed in the cavity (110), with an accommodation cavity (31) defined inside; at least part of an induction air duct (60) is provided on the fixing unit (30); An air flow induction unit (40) communicating with the induction air duct (60); A sealing structure (50), at least partially provided on the fixing unit (30), located on the outer periphery of the induction air duct (60), and in contact with the outer conductor unit (10) and / or the air flow induction unit (40).

2. The aerosol generating device according to claim 1, wherein The sealing structure (50) includes a boss (32) protruding from the outer side wall of the fixing unit (30); the boss (32) extends towards the air flow induction unit (40); The boss (32) is provided with a first air circulation hole (320), the first air circulation hole (320) communicates with the accommodation cavity (31), and defines at least part of the induction air duct (60).

3. The aerosol generating device according to claim 2, characterized in that, The sealing structure (50) further includes at least one sealing member (51), at least part of the sealing member (51) is in contact with the boss (32); and at least part of it is in contact with the outer conductor unit (10) or the air flow induction unit (40); A second air circulation hole (512) is provided on the sealing member (51), and the second air circulation hole (512) communicates with the first air circulation hole (320) to form part of the induction air duct (60).

4. The aerosol generating device according to claim 3, wherein, An accommodation groove (322) for accommodating at least part of the sealing member (51) is provided on the boss (32).

5. The aerosol generating device according to claim 4, wherein A positioning structure (323) for positioning and installing the sealing member (51) is provided in the accommodation groove (322).

6. The aerosol generating device according to claim 3, wherein A guiding structure (321) is provided on the boss (32); the sealing member (51) is sleeved on the guiding structure (321); The first air circulation hole (320) is provided on the guiding structure (321).

7. The aerosol generating device according to claim 3, characterized in that, There are two sealing members (51), one of the sealing members (51) is embedded in the boss (32), and the other sealing member (51) is sleeved on the outer periphery of the fixing unit (30) and is in close contact with the outer conductor unit (10).

8. The aerosol generating device according to claim 1, wherein, The outer conductor unit (10) includes a first end (10a) and a second end (10b) opposite to the first end (10a); the cavity (110) is provided between the first end (10a) and the second end (10b); the fixing unit (30) at least partially penetrates from the first end (10a) towards the second end (10b); The distance from the sealing structure (50) to the first end (10a) is less than the distance from the sealing structure (50) to the second end (10b).

9. The aerosol generating device according to claim 8, wherein, An air guiding column (12) is provided on the side wall of the outer conductor unit (10); part of the induction air duct (60) is formed inside the air guiding column (12); The air guiding column (12) includes a first port (12a) and a second port (12b); the first port (12a) is located in the outer conductor unit (10), and the sealing structure (50) contacts the end face where the first port (12a) is located; the air flow sensing unit (40) is installed on the air guiding column (12) and is located at the second port (12b).

10. The aerosol generating device according to claim 1, wherein The aerosol generating device further includes an inner conductor unit (20), and at least a part of the inner conductor unit (20) is installed in the cavity (110) and is connected to the outer conductor unit (10); The inner conductor unit (20) includes a radiation structure (21), and at least a part of the radiation structure (21) penetrates into the accommodating cavity (31).

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