Atomization assembly and aerosol generating device

Abstract

The invention relates to an atomization assembly and an aerosol generating device. The atomization assembly comprises an atomization cavity used for containing an aerosol forming substrate; the air heating cavity is provided with an air inlet and an air outlet communicated with the atomizing cavity; and the at least two heating bodies are arranged in the air heating cavity and are distributed on an air flow path from the air inlet to the air outlet at intervals. The aerosol generating device comprises an atomization assembly and a control circuit electrically connected with the atomization assembly. The at least two heating bodies are distributed on the airflow path from the air inlet to the air outlet at intervals, so that normal-temperature air is progressively heated layer by layer before entering the atomization cavity from the air inlet, heat is stacked layer by layer, and finally the normal-temperature air reaches the target temperature before entering the atomization cavity. Compared with single-layer heating, the multi-layer heating mode increases the heat exchange area and the heat exchange efficiency between the air and the heating body, the temperature of the air entering the atomization cavity can be increased, and the temperature risk caused by the fact that the heating body transfers heat to surrounding structural parts can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of atomization technology, and more specifically to an atomization component and an aerosol generating device. Background Art

[0002] Air heating is mainly achieved by heat exchange between a heating body (resistance, electromagnetic, infrared, etc.) and the air, and then the heated hot air flows through the aerosol-forming matrix, thereby heating the aerosol-forming matrix to produce aerosols. In this process, improving the heat exchange efficiency between the air and the heating body is the main means to improve the air heating effect.

[0003] Due to the limitation of low heat exchange efficiency between air and heating element, the current air heating technology generally has the problem of raising the heating element to a higher temperature in order to make the air reach the target temperature. In this process, the heating element is prone to overheating. When the heating element is overheated, the heat energy is conducted or radiated to the surrounding structural parts, causing the risk of high temperature of the whole machine structure, and greatly increasing the energy consumption of the whole machine. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an improved atomization assembly and an aerosol generating device having the atomization assembly in view of the above-mentioned defects of the prior art, which can reduce the heat loss of the heating body and protect the surrounding structural parts while ensuring the heat exchange efficiency between the air and the heating body.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct an atomization component, including:

[0006] An atomizing chamber for containing an aerosol-forming matrix;

[0007] an air heating chamber having an air inlet and an air outlet communicating with the atomizing chamber; and

[0008] At least two heating bodies are arranged in the air heating chamber and are spaced apart on the air flow path from the air inlet to the air outlet;

[0009] Each of the heating bodies is formed with a gap for air flow to pass through.

[0010] In some embodiments, the resistance values ​​of the at least two heating bodies increase gradually toward the air outlet.

[0011] In some embodiments, the at least two heating bodies are arranged in parallel with each other.

[0012] In some embodiments, the difference in resistance between two adjacent heating elements is 0.1Ω to 0.2Ω.

[0013] In some embodiments, each of the heating bodies includes a heat-generating body, and the heat-generating body is in the shape of a spiral disk.

[0014] In some embodiments, each of the heating bodies includes a heat-generating main body, and the interval between the heat-generating main bodies of two adjacent heating bodies is 3 mm to 5 mm.

[0015] In some embodiments, the atomizing chamber and the air heating chamber are coaxially arranged.

[0016] The air inlet and the air outlet are respectively located at two axial ends of the atomizing chamber.

[0017] In some embodiments, the atomization assembly includes a partition wall that separates the atomization chamber and the air heating chamber, and the air outlet includes a plurality of air outlet holes disposed on the partition wall.

[0018] In some embodiments, the atomization assembly includes a first air inlet plate and a second air inlet plate spaced apart from each other.

[0019] The air inlet includes at least one first air inlet hole formed on the first air inlet plate, a spacing channel formed between the first air inlet plate and the second air inlet plate, and at least one second air inlet hole formed on the second air inlet plate.

[0020] The at least one first air inlet hole, the spacing channel, and the at least one second air inlet hole are sequentially connected along the air flow direction.

[0021] In some embodiments, the air inlet includes a plurality of the first air inlet holes and a plurality of the second air inlet holes, and a total cross-sectional area of ​​the plurality of the second air inlet holes is smaller than a total cross-sectional area of ​​the plurality of the first air inlet holes.

[0022] In some embodiments, the atomizing assembly includes a receiving tube, the receiving tube defining at least a portion of the atomizing chamber and at least a portion of the air heating chamber.

[0023] The thermal conductivity of the housing tube is less than or equal to 10 W / m·K.

[0024] The present invention also provides an aerosol generating device, comprising the above-mentioned atomizing assembly and a battery and a control circuit electrically connected to the atomizing assembly respectively.

[0025] The implementation of the present invention has at least the following beneficial effects: the present invention adopts at least two heating bodies distributed at intervals on the air flow path from the air inlet to the air outlet, so that the room temperature air is heated layer by layer from the air inlet to before entering the atomization chamber, and the heat is stacked layer by layer, and finally reaches the target temperature before entering the atomization chamber; compared with single-layer heating, the multi-layer heating method increases the heat exchange area and heat exchange efficiency between the air and the heating body, can increase the temperature of the air entering the atomization chamber, and can also reduce the temperature risk caused by heat transfer from the heating body to the surrounding structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 is a schematic diagram of the three-dimensional structure of an aerosol generating system in some embodiments of the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generating system shown;

[0029] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the atomization component;

[0030] Figure 4 yes Figure 3 A schematic diagram of the longitudinal cross-sectional structure of the atomizing assembly shown;

[0031] Figure 5 yes Figure 3 A schematic diagram of the exploded structure of the atomization assembly shown;

[0032] Figure 6 is a schematic diagram of the longitudinal cross-sectional structure of the atomizer assembly in the first modified embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the longitudinal cross-sectional structure of the atomizing assembly in the second modified embodiment of the present invention;

[0034] Figure 8 It is the temperature distribution cloud diagram of the heating body when the heating body adopts two different resistance distributions;

[0035] Fig. 9 It is the temperature distribution cloud diagram of the heating tube when the heating body adopts two different resistance distributions;

[0036] Fig.10 It is a cloud diagram of the air temperature distribution at the outlet of the heating tube when the heating body adopts two different resistance distributions. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings or the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Figure 1-2An aerosol generating system 1 in some embodiments of the present invention is shown, which includes an aerosol generating device 100 and an aerosol-forming substrate 200 at least partially inserted into the aerosol generating device 100. The aerosol-forming substrate 200 may be cylindrical, and includes a solid smoking substrate for generating an aerosol after being heated. The solid smoking substrate may include one or more of a filament, a sheet, a granular, a powder, a paste, etc. The aerosol generating device 100 may be roughly in the shape of a square column, and is used to generate heat after being powered on to heat the aerosol-forming substrate 200 inserted therein, and release the aerosol extract in the aerosol-forming substrate 200 in a non-combustible state.

[0043] It is understandable that in other embodiments, the aerosol generating device 100 is not limited to a square column shape, and may be in other shapes such as an elliptical column or a cylindrical shape. The aerosol forming substrate 200 is not limited to a cylindrical shape, and may be in other shapes such as an elliptical column or a cylindrical shape.

[0044] like Figure 2-3 As shown, the aerosol generating device 100 may include a housing 10, a battery 20, an atomizer assembly 30 and a control circuit, wherein the battery 20, the atomizer assembly 30 and the control circuit are all accommodated in the housing 10. The control circuit is electrically connected to the battery 20 and the atomizer assembly 30, respectively, and is used to control the power on and off of the atomizer assembly 30 by the battery 20, and can also be used to control the power provided by the battery 20 to the atomizer assembly 30.

[0045] An insertion port 11 is formed on the top wall of the housing 10, and an atomization chamber 311 connected to the insertion port 11 is formed in the atomization assembly 30, and the aerosol-forming substrate 200 can be inserted into the atomization chamber 311 through the insertion port 11. In some embodiments, a sliding cover 40 may also be provided on the top wall of the housing 10, and the sliding cover 40 may be slidably provided on the top wall of the housing 10 to cover or expose the insertion port 11. When the aerosol generating device 100 is not needed, the sliding cover 40 may be pushed to cover the insertion port 11 to prevent dust from entering the housing 10 through the insertion port 11. When the aerosol generating device 100 is needed, the sliding cover 40 may be pushed to expose the insertion port 11 so that the aerosol-forming substrate 200 can be inserted from the insertion port 11.

[0046] In some embodiments, the atomizer assembly 30 can be installed in the housing 10 in a detachable manner, so that the atomizer assembly 30 can be removed from the housing 10 for cleaning or replacement. In the present embodiment, the atomizer assembly 30 includes a magnetic member 36, and a magnetic member 13 that is magnetically matched with the magnetic member 36 is provided in the housing 10. The atomizer assembly 30 can be fixed in the housing 10 by the magnetic attraction between the magnetic member 36 and the magnetic member 13, making the disassembly and assembly of the atomizer assembly 30 more convenient. Of course, in other embodiments, the atomizer assembly 30 can also be installed in the housing 10 in other detachable or non-detachable ways.

[0047] like Figure 3-5 As shown, an opening 310 is formed at the upper end of the atomization assembly 30 near the insertion port 11, and the insertion port 11, the opening 310, and the atomization chamber 311 are sequentially connected from top to bottom in the axial direction of the aerosol forming matrix 200, so as to facilitate the insertion of the aerosol forming matrix 200.

[0048] The atomizing assembly 30 further includes an air heating chamber 312 and at least one heating body 32 disposed in the air heating chamber 312. The air heating chamber 312 has an air inlet 3120 communicating with the outside and an air outlet 3121 communicating with the atomizing chamber 311. External normal temperature air can enter the air heating chamber 312 through the air inlet 3120, flow through the at least one heating body 32 and be heated by the at least one heating body 32, and the heated high temperature air then enters the atomizing chamber 311 through the air outlet 3121, thereby heating the aerosol-forming substrate 200 in the atomizing chamber 311.

[0049] Specifically, in this embodiment, the opening 310, the atomizing chamber 311, and the air heating chamber 312 are sequentially connected and coaxially arranged from top to bottom in the axial direction of the atomizing assembly 30. The air inlet 3120 and the air outlet 3121 are respectively located at two opposite ends of the axial direction of the air heating chamber 312, and the air inlet 3120 and the opening 310 are respectively located at two opposite ends of the axial direction of the atomizing assembly 30.

[0050] The atomizing assembly 30 may include a housing tube 33, which includes an atomizing tube 331, a heating tube 332, and a partition wall 333. The atomizing tube 331 and the heating tube 332 are sequentially arranged in the axial direction of the housing tube 33, the inner wall surface of the atomizing tube 331 defines at least a portion of the atomizing chamber 311, and the inner wall surface of the heating tube 332 defines at least a portion of the air heating chamber 312. The partition wall 333 is arranged at the boundary between the atomizing chamber 311 and the air heating chamber 312 to separate the atomizing chamber 311 from the air heating chamber 312. When the aerosol-forming substrate 200 is inserted into the atomizing tube 331, the lower end of the aerosol-forming substrate 200 can abut against the partition wall 333.

[0051] The air outlet 3121 may include a plurality of air outlet holes 3330 penetratingly arranged on the partition wall 333 . The plurality of air outlet holes 3330 may be uniformly distributed on the partition wall 333 , so that the high-temperature air in the air heating chamber 312 is uniformly distributed and enters the aerosol forming substrate 200 , thereby achieving uniform heating of the aerosol forming substrate 200 .

[0052] In this embodiment, the atomizing tube 331, the heating tube 332 and the partition wall 333 are integrally formed. Both the atomizing tube 331 and the heating tube 332 can be in the shape of a round tube with openings at both ends. The atomizing tube 331 extends upward from the upper end of the heating tube 332 and is coaxially arranged with the heating tube 332. Of course, in other embodiments, the atomizing tube 331 and the heating tube 332 can also be in other shapes such as a square tube or an elliptical tube. In addition, the atomizing tube 331 and the heating tube 332 can also be separately arranged; the partition wall 333 can be integrally formed with the atomizing tube 331 or the heating tube 332, or it can also be formed separately.

[0053] The housing tube 33 may be made of a material such as ceramics with low thermal conductivity, which is conducive to keeping most of the heat in the housing tube 33, reducing the risk of heat transfer to the outer wall of the housing tube 33 and surrounding structural parts, reducing heat loss, improving thermal efficiency, and reducing energy consumption. In some embodiments, the thermal conductivity of the housing tube 33 may be less than or equal to 10 W / m·K, preferably less than or equal to 3 W / m·K.

[0054] Further, the atomizer assembly 30 may also include an air inlet plate 37, which is disposed at the lower end of the accommodating tube 33 to cover the lower end opening of the accommodating tube 33. The air inlet 3120 may include at least one air inlet hole 371 disposed through the air inlet plate 37. In some embodiments, there are multiple air inlet holes 371, and the multiple air inlet holes 371 may be evenly distributed in an array on the air inlet plate 37 to make the air intake uniform. Of course, in other embodiments, there may be only one air inlet hole 371, which may be disposed in the middle of the air inlet plate 37 or other positions.

[0055] There are at least two heating bodies 32, and the at least two heating bodies 32 can be spaced apart on the airflow path between the air inlet 3120 and the air outlet 3121. A gap 320 for airflow to pass through can also be formed on each heating body 32, so that the air entering from the air inlet 3120 can pass through the gap 320 and further enter the atomization chamber 311, thereby increasing the heat exchange efficiency between the heating body 32 and the air. The at least two heating bodies 32 adopt a multi-layer heating method, so that the normal temperature air is heated layer by layer from the air inlet 3120 to before entering the aerosol forming matrix 200, and the heat is stacked layer by layer, and finally reaches the target temperature before entering the aerosol forming matrix 200. At the same time, compared with single-layer heating, the temperature of a single heating body 32 is reduced when multi-layer heating is adopted, thereby also reducing the temperature risk caused by heat transfer from the heating body 32 to the surrounding structural parts.

[0056] In addition, compared with single-layer heating, multi-layer heating increases the heat exchange area between the air and the heating body 32. According to the convection heat transfer principle, the heat is proportional to the heat exchange coefficient and the heat exchange area. The larger the heat exchange area, the more sufficient the heat exchange between the air and the heating body 32, and the higher the air temperature at the air outlet 3121.

[0057] Furthermore, the at least two heating bodies 32 are connected in parallel with each other. The material of the heating body 32 can be one or more of stainless steel, nickel-chromium, iron-chromium-aluminum, etc. The shape and material of the heating body 32 can be adjusted so that the at least two heating bodies 32 have different resistance values. In the case of parallel connection with the same voltage, the smaller the resistance of the heating body 32, the faster the temperature rises and the higher the temperature. Of course, in other embodiments, the at least two heating bodies 32 can also be connected in series with each other. In the case of series connection, the larger the resistance of the heating body 32, the faster the temperature rises.

[0058] In some embodiments, each heating body 32 includes a heating body 321 and two electrode parts 322 connected to the heating body 321. The heating body 321 may include a heating wire or a heating sheet. The shape of the heating body 321 can be adjusted so that the heating body 321 has different lengths, thereby forming different temperatures layer by layer for the heating body 32. When the cross-sectional area of ​​the heating wire or the heating sheet is the same, the longer the length of the heating wire or the heating sheet, the greater the resistance.

[0059] Preferably, the resistance of the at least two heating bodies 32 increases layer by layer in the direction close to the air outlet 3121. The lower heating body 32 near the air inlet 3120 has a small resistance and heats up quickly. When the airflow enters, it can heat up quickly. The upper heating body 32 near the air outlet 3121 has a large resistance, a long heating wire or a long heating sheet, and a large heat exchange area, thereby increasing the heat exchange efficiency and transferring more heat to the air. In addition, due to the suction airflow, the airflow is heated layer by layer on the path from the air inlet 3120 to the air outlet 3121, so that the heating body 32 itself has a phenomenon that the temperature of the upper heating body 32 is higher and the temperature of the lower heating body 32 is lower. By increasing the resistance of the upper heating body 32 and reducing the power distributed in the upper heating body 32, the temperature of the outlet end (i.e., the end where the air outlet 3121 is located) of the outer wall surface of the heating tube 332 can be reduced, thereby reducing the difficulty of heat insulation and reducing the risk of overheating caused by the contact between the atomization assembly 30 and the surrounding structural parts.

[0060] Since the resistance of a single heater 32 itself is not large, when multiple heaters 32 are connected in parallel with the same voltage, the resistance variation range of the multiple heaters 32 does not need to be too large, so that the power of each heater 32 can be different. In some embodiments, the resistance increment range of the heater 32 is 0.1Ω to 0.2Ω (including both ends), that is, the resistance of one heater 32 near the air outlet 3121 of each two adjacent heaters 32 is 0.1Ω to 0.2Ω (including both ends) greater than the resistance of the heater 32 far from the air outlet 3121.

[0061] Preferably, the heating body 321 may be in a disc shape (e.g., a spiral disc shape or a grid disc shape, etc.), so as to have a larger heat exchange area. When the heating body 321 is in a spiral disc shape, the gap between each two adjacent spiral turns forms a gap 320 for airflow to pass through. When the heating body 321 is in a grid disc shape, the grid holes on the heating body 321 form a gap 320 for airflow to pass through. Of course, in other embodiments, the heating body 321 may also be in other shapes, such as an S shape, etc.

[0062] Specifically, in this embodiment, there are three heating bodies 32. The heating body 321 of each heating body 32 includes a double-helix heating wire, and the two electrode parts 322 are respectively connected to the outer ends (the ends away from the center of the spiral) of the two spiral heating wires. Further, the two electrode parts 322 can be respectively located or approximately located on two opposite sides of the radial direction of the heating body 321, so that there is enough space between the two electrode parts 322, which is convenient for external electrodes or leads to avoid short circuits.

[0063] The interval between the heating bodies 321 of two adjacent heating bodies 32 should not be too small, otherwise it is easy to cause local heat accumulation, the outer wall surface of the heating tube 332 is overheated, and the air travel path is short and the time is short, and the heat exchange is not sufficient, and the parallel welding process is difficult. Of course, the interval should not be too large, otherwise it is easy to cause the air travel path to be too long, and the air is cooled in the interval between the two adjacent heating bodies 321. In some embodiments, the interval between the two adjacent heating bodies 321 can be 3mm to 5mm (including the values ​​at both ends).

[0064] Of course, the distance between the heating body 321 of the heating body 32 closest to the air outlet 3121 and the air outlet 3121 or the aerosol-forming substrate 200 should not be too large to avoid air cooling. In some embodiments, the distance between the heating body 321 closest to the air outlet 3121 and the air outlet 3121 or the aerosol-forming substrate 200 may be less than or equal to 5 mm.

[0065] In some embodiments, the atomizing assembly 30 may further include a sleeve 34 and a bracket 35. The sleeve 34 and the bracket 35 cooperate with each other to accommodate and fix the accommodating tube 33.

[0066] The sleeve 34 may include a barrel 341 and an extension portion 342 extending outward from the outer side of the barrel 341. The barrel 341 may be sleeved on the outer periphery of the accommodating tube 33 and may be coaxially arranged with the accommodating tube 33. The barrel 341 may be in the shape of a circular tube with openings at both ends, and the upper end thereof is opened to form an opening 310.

[0067] The bracket 35 may include a wall portion 352 and a base 351 and a fixing portion 353 respectively located at both ends of the wall portion 352. The wall portion 352 extends in the axial direction of the atomizer assembly 30 and is arranged on the outer side of the cylinder 341. The extension portion 342 and the fixing portion 353 are located on the same side of the atomizer assembly 30 in the circumferential direction, and the extension portion 342 and the fixing portion 353 are installed in cooperation with each other, so as to realize the fixation between the sleeve 34 and the bracket 35. For example, the extension portion 342 and the fixing portion 353 can be fixedly connected together by means of screws, etc., so as to fix the sleeve 34 and the bracket 35 to each other. The magnetic suction member 36 can be embedded in the bottom of the fixing portion 353.

[0068] The base 351 is disposed at the lower end of the cylinder 341 to support the cylinder 341, the air inlet plate 37 and the receiving tube 33, and to cover the lower end opening of the cylinder 341. The lower end surface of the cylinder 341 can be against the base 351.

[0069] The base 351 includes an air inlet plate 3511, and at least one air inlet hole 3510 communicating with the outside may be provided through the air inlet plate 3511. In this embodiment, there are multiple air inlet holes 3510, and the multiple air inlet holes 3510 may be evenly distributed in an array on the air inlet plate 3511 to ensure uniform air intake. Of course, in other embodiments, there may be only one air inlet hole 3510, which may be provided in the middle of the air inlet plate 3511 or at other locations.

[0070] The air inlet plate 3511 is spaced from the air inlet plate 37, so that a spaced channel 370 is formed between the upper end surface of the air inlet plate 3511 and the lower end surface of the air inlet plate 37, and the air inlet hole 3510, the spaced channel 370, and the air inlet hole 371 are sequentially connected to form the air inlet 3120. During atomization, the outside air can enter the air heating chamber 312 through the air inlet hole 3510, the spaced channel 370, and the air inlet hole 371 in sequence, and flow through at least two heating bodies 32 in sequence and exchange heat with the at least two heating bodies 32. After the heat exchange, the high-temperature air enters the atomization chamber 311 through the air outlet hole 3330 to heat the aerosol-forming matrix 200 contained in the atomization chamber 311.

[0071] In some embodiments, the cross-sectional area of ​​the at least one air inlet hole 371 is smaller than the cross-sectional area of ​​the at least one air inlet hole 3510. When there are multiple air inlet holes 371 and multiple air inlet holes 3510 respectively, the total cross-sectional area of ​​the multiple air inlet holes 371 is smaller than the total cross-sectional area of ​​the multiple air inlet holes 3510, so that the airflow can be accelerated through at least one air inlet hole 371.

[0072] The cross-sectional shape of each air inlet 371 and air inlet 3510 is not limited, and can be various shapes such as circular, elliptical, triangular, square, polygonal, etc. The cross-sectional area of ​​a single air inlet 371 can be smaller than, equal to, or larger than the cross-sectional area of ​​a single air inlet 3510 .

[0073] In some embodiments, the base 351 may further include an annular protrusion 3512 extending upward from the outer edge of the air inlet plate 3511, and the inner wall of the annular protrusion 3512 protrudes inward to form a flange 3513. The air inlet plate 37 may be received in the annular protrusion 3512 and abut against the flange 3513, so that the air inlet plate 37 and the air inlet plate 3511 are spaced apart.

[0074] Furthermore, the atomizing assembly 30 may also include two electrode columns 39, which are respectively electrically connected to the two poles of at least two heating bodies 32. Specifically, in this embodiment, two electrode holes 3530 may be formed on the fixing portion 353, and the upper ends of the two electrode columns 39 may be respectively inserted and fixed in the two electrode holes 3530. The lower end of the electrode column 39 exposes the electrode hole 3530, which is convenient for external power supply.

[0075] Further, the atomizer assembly 30 also includes two electrode connectors 38, each of which includes an electrode portion 381 for connecting to the heater 32, an electrode portion 383 for connecting to the electrode column 39, and a connecting portion 382 connecting the electrode portion 381 and the electrode portion 383. The connecting portion 382 extends along the axial direction of the atomizer assembly 30, and the electrode portion 381 and the electrode portion 383 are respectively located at the axial ends of the connecting portion 382, ​​which can be formed by bending the two ends of the connecting portion 382. The electrode portion 381 can be installed on the upper side of the air inlet plate 37 to facilitate connection with the heater 32.

[0076] A wiring groove 3520 may be formed between the wall portion 352 and the cylinder 341 for wiring of the connection portion 382. In this embodiment, the wiring groove 3520 is formed by the depression of the wall portion 352. In other embodiments, the wiring groove 3520 may also be formed by the depression of the cylinder 341, or may also be formed by the depression of the wall portion 352 and the cylinder 341.

[0077] The electrode connection structure can avoid the electrode column 39 being disposed on the base 351 and occupying the space of the base 351, thereby affecting the air intake. It can be understood that in other embodiments, the electrode column 39 can also be penetrated on the base 351. In this case, the atomizer assembly 30 does not need to be provided with the electrode connector 38.

[0078] Figure 6 The atomizing assembly 30 in the first modified embodiment of the present invention is shown. The main difference between the atomizing assembly 30 and the above-mentioned embodiment is that in the present embodiment, the atomizing tube 331 and the heating tube 332 are separately provided, and the partition wall 333 is integrally formed with the upper end of the heating tube 332. The lower end of the atomizing tube 331 can be sleeved outside the upper end of the heating tube 332. Of course, in other embodiments, the lower end surface of the atomizing tube 331 can also be against the upper end surface of the heating tube 332.

[0079] Figure 7 The atomizing assembly 30 in the second modified embodiment of the present invention is shown. The main difference between the atomizing assembly 30 and the above-mentioned embodiment is that in the present embodiment, the atomizing tube 331 and the heating tube 332 are separately provided, and the partition wall 333 is integrally formed with the lower end of the atomizing tube 331. The lower end surface of the atomizing tube 331 can be against the upper end surface of the heating tube 332. Of course, in other embodiments, the upper end of the heating tube 332 can also be sleeved outside the lower end of the atomizing tube 331.

[0080] Figure 8 , Fig. 9 , Fig.10 The temperature distribution cloud diagram of the heating body 32 , the temperature distribution cloud diagram of the heating tube 332 , and the air temperature distribution cloud diagram at the outlet end of the heating tube 332 are respectively shown when the heating body 32 adopts two different resistance distributions.

[0081] in, Figure 8 The arrow direction in the figure indicates the airflow direction, and the airflow flows through the three heating bodies 32 from bottom to top. The test conditions are: the test power is 15W, the interval between each two adjacent heating bodies 32 is 4mm; Figure 8 In (a), the three heating bodies 32 are controlled at the same temperature, the temperature of each heating body 32 is 900°C, and the three heating bodies 32 have the same resistance value, the resistance value of each heating body 32 is 0.6Ω; Figure 8 In (b), the temperatures of the three heating bodies 32 are controlled to increase layer by layer. The temperatures of the three heating bodies 32 are 950°C, 800°C, and 650°C from top to bottom, respectively. The resistance values ​​of the three heating bodies 32 are 0.7Ω, 0.6Ω, and 0.5Ω from top to bottom, respectively.

[0082] When using Figure 8 When the heating body 32 is shown in (a), the temperature distribution cloud diagram of the heating tube 332 is as follows Fig. 9As shown in (a), the temperature distribution cloud diagram of the air output from the outlet end of the heating tube 332 is as follows: Fig.10 (a). Fig. 9 (a) Fig.10 (a) It can be seen that when the three heating bodies 32 have the same resistance value, the outer wall temperature at the outlet end of the heating tube 332 is about 380°C, and the maximum temperature of the air flow at the outlet end of the heating tube 332 is about 650°C.

[0083] When using Figure 8 When the heating body 32 is shown in (b), the temperature distribution cloud diagram of the heating tube 332 is as follows Fig. 9 As shown in (b), the temperature distribution cloud diagram of the air output from the outlet of the heating tube 332 is as follows: Fig.10 (b) is shown. Fig. 9 (b) Fig.10 (b) It can be seen that when the resistance and temperature of the three heating bodies 32 increase layer by layer, the outer wall temperature of the outlet end of the heating tube 332 is about 350°C, and the maximum temperature of the air flow at the outlet end of the heating tube 332 can reach 700°C.

[0084] Combination Fig. 9 , Fig.10 It can be seen that when the temperatures of the three heating bodies 32 are controlled to increase layer by layer, the maximum temperature of the air flow at the outlet end of the heating tube 332 can increase by about 50°C, indicating that under the same power, when the heating body 32 adopts a layer-by-layer temperature increase method, the heat utilization rate is higher, the heat loss is less, and the thermal risk to surrounding components is smaller.

[0085] In this way, when the air at the air outlet 3121 reaches the target value, the temperature on the outer wall of the heating tube 332 when the heating body 32 adopts a layer-by-layer stepped resistance will be lower than the temperature on the outer wall of the heating tube 332 when each layer of the heating body 32 adopts the same resistance value, thereby reducing the difficulty of insulation and reducing the risk of overheating caused by the contact between the atomization component 30 and the surrounding structures.

[0086] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0087] The above embodiments only express the specific implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. An atomizing assembly, characterized in that: include: An atomizing chamber (311) for containing an aerosol-forming matrix (200); An air heating chamber (312) having an air inlet (3120) and an air outlet (3121) connected to the atomization chamber (311); as well as At least two heating bodies (32) are arranged in the air heating chamber (312) and are spaced apart on the air flow path from the air inlet (3120) to the air outlet (3121); Each of the heating bodies (32) is formed with a gap (320) for air flow to pass through.

2. The atomizer assembly according to claim 1, characterized in that: The resistance values ​​of the at least two heating bodies (32) increase gradually in a direction approaching the air outlet (3121).

3. The atomizer assembly according to claim 2, characterized in that: The at least two heating bodies (32) are arranged in parallel with each other.

4. The atomizer assembly according to claim 2, characterized in that: The difference in resistance between two adjacent heating bodies (32) is 0.1Ω to 0.2Ω.

5. The atomizer assembly according to claim 1, characterized in that: Each of the heating bodies (32) comprises a heating body (321), and the heating body (321) is in the shape of a spiral disk.

6. The atomizer assembly according to claim 1, characterized in that: Each of the heating bodies (32) comprises a heating main body (321), and the interval between the heating main bodies (321) of two adjacent heating bodies (32) is 3 mm to 5 mm.

7. The atomizer assembly according to claim 1, characterized in that: The atomizing chamber (311) and the air heating chamber (312) are coaxially arranged. The air inlet (3120) and the air outlet (3121) are respectively located at two axial ends of the atomization chamber (311).

8. The atomizer assembly according to claim 1, characterized in that: The atomizing assembly comprises a partition wall (333) separating the atomizing chamber (311) and the air heating chamber (312). The air outlet (3121) includes a plurality of air outlet holes (3330) arranged on the partition wall (333).

9. The atomizer assembly according to any one of claims 1 to 8, characterized in that: The atomization assembly comprises a first air inlet plate (3511) and a second air inlet plate (37) which are arranged at intervals. The air inlet (3120) comprises at least one first air inlet hole (3510) formed on the first air inlet plate (3511), a spacing channel (370) formed between the first air inlet plate (3511) and the second air inlet plate (37), and at least one second air inlet hole (371) formed on the second air inlet plate (37), The at least one first air inlet hole (3510), the spacing channel (370), and the at least one second air inlet hole (371) are sequentially connected along the airflow direction.

10. The atomizer assembly according to claim 9, characterized in that: The air inlet (3120) includes a plurality of the first air inlet holes (3510) and a plurality of the second air inlet holes (371), The total cross-sectional area of ​​the plurality of second air inlet holes (371) is smaller than the total cross-sectional area of ​​the plurality of first air inlet holes (3510).

11. The atomizer assembly according to any one of claims 1 to 8, characterized in that: The atomizing assembly comprises a containing tube (33), wherein the containing tube (33) defines at least a portion of the atomizing chamber (311) and at least a portion of the air heating chamber (312). The thermal conductivity of the containing tube (33) is less than or equal to 10 W / m·K.

12. An aerosol generating device, characterized in that: It comprises an atomizer assembly (30) as claimed in any one of claims 1 to 11, and a battery (20) and a control circuit electrically connected to the atomizer assembly (30) respectively.

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