Atomization assembly and aerosol generating device

Abstract

The utility model relates to the technical field of electronic atomization, and provides an atomization assembly and an aerosol generating device.The atomization assembly comprises an atomization core, and the atomization core comprises at least two first liquid guiding pieces, a first heating piece, a second liquid guiding piece and a second heating piece which are sequentially stacked; along the transmission direction of the aerosol matrix, the liquid guide rates of the first liquid guide pieces are sequentially increased, and the liquid guide rates of the first liquid guide pieces are greater than the liquid guide rates of the second liquid guide pieces. According to the atomization assembly provided by the invention, the atomization core adopts a stacked structure, the first heating element can be utilized to preheat the aerosol matrix, a certain temperature is kept in the liquid guide element, the instant atomization temperature of the second heating element can be reduced, and meanwhile, the aerosol matrix of a low-viscosity fluid can also be formed; the problems of carbon deposition and core pasting caused by high temperature of the heating piece are reduced, the service life of the heating piece can be greatly prolonged, the liquid guide rate of the liquid guide piece is set, finer aerosol can be atomized, and then the smoking experience is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electronic atomization, and more particularly to an atomization assembly and an aerosol generating device. BACKGROUND

[0002] The atomization device is a device for atomizing a liquid medium to form an aerosol, mainly including a liquid storage cup for storing an aerosol substrate and an atomization assembly assembled to the liquid storage cup. The atomization assembly generally includes a liquid guide and a heating element assembled to one side of the liquid guide. The liquid guide is used to guide the aerosol substrate in the liquid storage cup to the heating element. The aerosol substrate is atomized to form an aerosol after being heated by the heating element.

[0003] The heating element is the core element of the atomization assembly. Common heating bodies are roughly divided into spiral columnar heating bodies and planar heating bodies. In a disposable or open-type atomizer, the planar heating body is more commonly used. The heating mesh is attached to one side of the inner wrapped cotton, and the whole is rolled into a cylinder and packaged into an atomization core assembly. Since the heating mesh is directly attached to the inner wrapped cotton in the atomization assembly using this structure, the instantaneous temperature required for atomization is relatively high, which can easily burn through the inner wrapped cotton, thereby reducing the service life of the atomization core. Meanwhile, the instantaneous high temperature can easily cause the aerosol substrate or the inner wrapped cotton to carbonize, which is accumulated on the surface of the heating mesh, thereby reducing the surface heating efficiency of the heating mesh and further affecting the taste of the atomization. For aerosol substrates with high viscosity (such as aerosol substrates with high VG content), the atomization assembly using this structure can easily cause the atomization core to be burnt. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiments of the present application is to provide an atomization assembly and an aerosol generating device which can avoid dry burning and burnt atomization core, have a long service life of the heating element, and can improve the smoking experience.

[0005] To achieve the above purpose, the technical solution adopted by the present application is to provide an atomization assembly, which includes an atomization core. The atomization core includes at least two first liquid guides, a first heating element, a second liquid guide, and a second heating element which are sequentially stacked. The first liquid guide is used to transmit an aerosol substrate to the second liquid guide. Along the transmission direction of the aerosol substrate, the liquid guiding rate of the first liquid guide increases sequentially, and the liquid guiding rate of each first liquid guide is greater than the liquid guiding rate of the second liquid guide.

[0006] In one embodiment, along the transmission direction of the aerosol substrate, the porosity of each first liquid guide increases sequentially, and the porosity of each first liquid guide is greater than the porosity of the second liquid guide.

[0007] In one embodiment, the heating temperature of the first heating element is less than the heating temperature of the second heating element.

[0008] In one embodiment, the heating temperature of the first heating element is set to 50-150 degrees, and the heating temperature of the second heating element is set to 150-350 degrees.

[0009] In one embodiment, the first heating element is configured to work earlier than the second heating element.

[0010] In one embodiment, the atomization core is in a flat and stacked structure or a curved and cylindrical structure.

[0011] In one embodiment, the atomization assembly further comprises a cylindrical retaining element for maintaining the fixed curvature of the atomization core, the atomization core is accommodated in the retaining element, and the inner wall surface of the retaining element is in close contact with the outer wall surface of the outermost first liquid guide element.

[0012] In one embodiment, the inner wall surface of the retaining element is vertically provided with a positioning strip, and the two ends of the curved atomization core are respectively in abutment with the side walls on the corresponding sides of the positioning strip.

[0013] In one embodiment, the atomization assembly further comprises a base provided at the bottom end of the retaining element, and one end of the retaining element is fixed on the base.

[0014] In one embodiment, the first liquid guide element and the second liquid guide element are both liquid guide cotton.

[0015] An aerosol generating device comprising the above atomization assembly.

[0016] The atomization assembly provided by the present application has the following advantages: compared with the prior art, the atomization assembly of the present application is provided with two heating elements, the first liquid guide element, the second liquid guide element and the two heating elements adopt a stacked structure, the first heating element can be used to preheat the aerosol substrate, a certain temperature can be maintained inside the liquid guide element, the atomization temperature of the second heating element can be reduced, and the aerosol substrate of low viscosity fluid can also be formed, thereby reducing the problem of carbon deposition and core paste caused by high temperature of the heating element, greatly improving the service life of the heating element, and atomizing more delicate aerosol by setting the liquid guide rate of the liquid guide element, thereby improving the smoking experience. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The structure diagram of the atomization assembly provided by the present application is shown in the drawings.

[0019] Figure 2 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4.

[0020] Figure 3 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 2 An assembly view of an atomizing core and a retaining member in the atomizing assembly shown in FIG. 4 is shown in FIG. 5. Figure 1 ;

[0021] Figure 4 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 2 An assembly view of an atomizing core and a retaining member in the atomizing assembly shown in FIG. 4 is shown in FIG. 5. Figure 2 ;

[0022] Figure 5 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 2 A top view of the atomizing assembly shown in FIG. 4 after assembly of the atomizing core and the retaining member is shown in FIG. 6.

[0023] Figure 6 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 2 A partial structural view of an atomizing core in the atomizing assembly shown in FIG. 4 is shown in FIG. 7.

[0024] Figure 7 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4.

[0025] Figure 8 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 7 A perspective view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4.

[0026] Figure 9 A top view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4. Figure 7 A top view of an atomizing assembly according to another embodiment of the present application is shown in FIG. 4.

[0027] Figure 10 A partial structural view of an atomizing core in the atomizing assembly shown in FIG. 4 is shown in FIG. 7. Figure 7 A partial structural view of an atomizing core in the atomizing assembly shown in FIG. 4 is shown in FIG. 7.

[0028] In the drawings:

[0029] 1 - atomizing assembly; 10 - atomizing core; 20 - retaining member; 30 - base; 11 - first liquid guide; 12 - second liquid guide; 13 - first heating element; 14 - second heating element; 101 - first electrically conductive pin; 102 - second electrically conductive pin; 21 - positioning strip; 22 - opening. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0034] Please refer to Figure 1 The atomization assembly 1 provided by the embodiment of the present application will be described. The atomization assembly 1 comprises an atomization core 10. The atomization core 10 comprises at least two first liquid guides 11, a first heating element 13, a second liquid guide 12 and a second heating element 14 which are sequentially stacked. That is, the plurality of liquid guides and the plurality of heating elements are combined in a stacked manner to form the atomization core 10, the atomization core 10 has two heating elements, including the first heating element 13 and the second heating element 14, the second liquid guide 12 is located between the first heating element 13 and the second heating element 14, and the two surfaces of the second liquid guide 12 are in close contact with the first heating element 13 and the second heating element 14 respectively. The first heating element 13 and the second heating element 14 both have a certain resistance and can generate heat after being electrified.

[0035] In the embodiment, the first heating element 13 realizes preheating of the aerosol substrate to improve the fluidity of the aerosol substrate and speed up the supply speed of the aerosol substrate, and at the same time forms a temperature field inside the atomization core 10, which can reduce the atomization temperature of the second heating element 14 instantaneously, greatly improve the service life of the heating element, and reduce the problems of carbon deposition and core paste caused by high temperature of the heating element.

[0036] Preferably, the first heating element 13 and the second heating element 14 can be in a mesh structure, which facilitates the evaporation of the aerosol matrix from the gaps. The first liquid guiding element 11 can continuously transfer the aerosol matrix to the second liquid guiding element 12, which can prevent the two heating meshes from burning dry and avoid carbon buildup.

[0037] Along the transport direction of the aerosol matrix ( Figure 1 In the direction F of the aerosol matrix, the liquid guiding rate of the first liquid guiding element 11 is set to increase sequentially, and the liquid guiding rate of each first liquid guiding element 11 is set to be greater than the liquid guiding rate of the second liquid guiding element 12. This can further improve the transmission speed of the aerosol matrix, and at the same time improve the fineness of the aerosol generated after atomization, thus enhancing the suction experience. More specifically, along the transmission direction of the aerosol matrix, the porosity of each first liquid guiding element 11 can be set to increase sequentially, and the porosity of each first liquid guiding element 11 can be set to be greater than the porosity of the second liquid guiding element 12, so as to achieve the purpose of the liquid guiding rate of the first liquid guiding element 11 increasing sequentially, and the liquid guiding rate of each first liquid guiding element 11 being greater than the liquid guiding rate of the second liquid guiding element 12.

[0038] In one embodiment, the heating temperature of the first heating element 13 is set to be lower than the heating temperature of the second heating element 14, so as to ensure that the aerosol matrix is ​​atomized at the first heating element 13. That is, in this embodiment, by limiting the heating temperature, the first heating element 13 is used for preheating, while the second heating element 14 is used for atomization.

[0039] The heating temperature of the first heating element 13 can be set to a range of 50 to 150 degrees Celsius. Specifically, the heating temperature can be 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 degrees Celsius, etc.

[0040] The heating temperature of the second heating element 14 can be set from 150 degrees to 350 degrees, and the specific heating temperature can be 151 degrees, 160 degrees, 180 degrees, 200 degrees, 220 degrees, 240 degrees, 260 degrees, 280 degrees, 300 degrees, 320 degrees, 330 degrees, 350 degrees, etc.

[0041] In one embodiment, the first heating element 13 operates before the second heating element 14, so as to preheat the aerosol matrix before the second heating element 14 atomizes it, thereby improving its fluidity.

[0042] The material of the first liquid guide 11 and the second liquid guide 12 can be cotton, that is, each liquid guide is liquid guide cotton, such as defatted cotton, organic cotton or fiber cotton, and the use of cotton material is beneficial to improve the volatilization effect of the aerosol substrate, is convenient to use and safe and harmless. Each liquid guide cotton can be a single-layer structure or a multi-layer structure. In other embodiments, the liquid guide can also use linen non-woven fabric, viscose non-woven fabric, American cotton, Australian cotton and composite cotton formed by at least two of the above materials. The material of the first heating element 13 and the second heating element 14 can be, but is not limited to, stainless steel, iron-based alloy, nickel-based alloy, iron-chromium-aluminum alloy or titanium alloy, and can also use other high-temperature resistant conductive metal materials. The first heating element 13 and the second heating element 14 can both adopt a regular mesh structure, such as a heating mesh with a plurality of through holes of the same size and uniform arrangement; the mesh structure can also be an irregular structure.

[0043] When the first liquid guide 11 and the second liquid guide 12 are both liquid guide cotton, the aerosol substrate is conducted from the first liquid guide 11 to the second liquid guide 12 for atomization, and is preheated once when passing through the first heating element 13, the preheating temperature being lower than the atomization temperature of the aerosol substrate. The preheating can increase the temperature of the nearby heat field, and the liquid guide cotton also plays a role in heat preservation and insulation, and can keep the temperature field unchanged for a short time, so as to form an aerosol substrate of low viscosity fluid. The aerosol substrate gradually penetrates to the position of the second heating element 14, the heating mesh releases heat after being loaded with voltage, and the aerosol substrate starts to atomize. Under the action of the airflow, the aerosol flows, and then the atomization effect is achieved. Since the second liquid guide 12 has a structure with high liquid guide rate and low porosity, it can atomize a relatively delicate aerosol, which can effectively improve the smoking experience. Due to the preheating effect of the first heating element 13, the instantaneous atomization temperature of the second heating element 14 is reduced, and the atomization effect is also achieved, reducing the problem of carbon deposition and core paste caused by high temperature of the heating mesh, and greatly improving the service life of the heating.

[0044] Referring to Figure 1 , the number of the first liquid guide 11 is two, and the limit temperature of the first liquid guide 11 close to the first heating element 13 is higher than that of the first liquid guide 11 away from the first heating element 13.

[0045] The atomization core 10 can be bent and rolled into a cylindrical shape, that is, each liquid guiding cotton and the two heating nets are all rolled into a cylindrical shape, and the outer side of the liquid guiding cotton located at the outermost side is in contact with the aerosol substrate, that is, in communication with the liquid storage cavity in the atomization device for storing the aerosol substrate. That is to say, when the atomization core 10 is bent to form a cylindrical shape, the liquid storage cavity for storing the aerosol substrate is located at the outer side of the liquid guiding cotton located at the outermost side, and the aerosol substrate is transmitted from the outer side to the inner side of the atomization assembly 1. Since the first heating element 13 forms a temperature field inside the liquid guiding cotton, the second heating element 14 instantaneously reduces the atomization temperature, so that the problems of carbon deposition and burnt cotton caused by high temperature can be effectively reduced, and the service life of the heating element is improved.

[0046] It can be understood that the atomization core 10 can also adopt a flat and stacked structure, that is, each liquid guiding cotton and the two heating nets are all arranged in a horizontal state, the liquid guiding cotton located at the uppermost side is in contact with the aerosol substrate, that is, in communication with the liquid storage cavity in the atomization device for storing the aerosol substrate, and the liquid storage cavity for storing the aerosol substrate is located directly above the atomization core 10. The cross-sectional shape of the liquid guiding cotton is not limited to a rectangular shape, but can also be an arc-shaped edge or an edge with a notch. The number of the first liquid guiding element 11 can also be arranged in more layers, such as three layers, four layers, five layers, etc.

[0047] The atomization core 10 can also be bent into a shape between 0 and 360 degrees, for example, 10 degrees, 30 degrees, 50 degrees, 70 degrees, 90 degrees, 110 degrees, 130 degrees, 150 degrees, 180 degrees, 200 degrees, 220 degrees, 240 degrees, 260 degrees, 280 degrees, 300 degrees, 320 degrees, 340 degrees, 355 degrees, etc.

[0048] Compared with the prior art, the atomization assembly 1 provided in the present application is provided with two heating elements, the first liquid guiding element 11, the second liquid guiding element 12 and the two heating elements adopt a stacked structure, the first heating element 13 can be used to preheat the aerosol substrate, a certain temperature is maintained inside the liquid guiding element, the atomization temperature of the second heating element 14 is instantaneously reduced, the aerosol substrate with low viscosity can be formed, the problems of carbon deposition and burnt cotton caused by high temperature of the heating element can be reduced, the service life of the heating element can be greatly improved, the liquid guiding rate of the liquid guiding element can be set, and the aerosol can be atomized to be more delicate, thereby improving the smoking experience.

[0049] The resistance value of the first heating element 13 and the second heating element 14 ranges from 0.01 to 10 ohms, and the specific value can be 0.01 ohm, 0.05 ohm, 0.1 ohm, 0.5 ohm, 1 ohm, 1.5 ohm, 2 ohm, 3 ohm, 5 ohm, 6 ohm, 8 ohm, 9 ohm, 10 ohm, etc.

[0050] The working time of the first heating element 13 can be set to be greater than the working time of the second heating element 14, so as to achieve the preheating effect and avoid the second liquid guide element 12 from being burnt. The working time of the first heating element 13 can be 0.1-5 seconds, and the specific working time can be 0.1 second, 0.2 second, 0.3 second, 0.5 second, 0.8 second, 1 second, 1.5 seconds, 2 seconds, 2.5 seconds, 3 seconds, 3.5 seconds, 4 seconds, 4.5 seconds, 5 seconds, etc.

[0051] The working time of the second heating element 14 can be 0.05-3 seconds, and the specific working time can be 0.05 second, 0.1 second, 0.15 second, 0.25 second, 0.4 second, 0.6 second, 0.8 second, 1.2 second, 1.8 second, 2.2 second, 2.4 second, 2.6 second, 2.8 second, 3 second, etc. By stacking the liquid guide cotton with different resistance values and different liquid guide rates, and stacking the two heating elements to form the atomization core 10, the first heating element 13 plays a preheating role, forming a temperature field inside the liquid guide cotton, reducing the instantaneous atomization temperature of the second heating element 14, and solving the problems of easy carbon deposition, easy core burning, and short service life of the heating element. At the same time, by setting the liquid guide rate and porosity of the liquid guide element, a more delicate aerosol can be atomized, and the smoking experience can be effectively improved.

[0052] The atomization assembly 1 further comprises a retaining element 20 in the shape of a cylinder, and the axial length of the retaining element 20 is greater than the axial length of the atomization core 10. The retaining element 20 is sleeved on the outside of the first liquid guide element 11, and the retaining element 20 can maintain the shape of the atomization core 10 after bending, that is, the atomization core 10 can maintain a fixed bending angle, and the curvature of the atomization core 10 is fixed. At the same time, the atomization assembly 1 can be fixed in the atomization device by means of the retaining element 20. The retaining element 20 can be but is not limited to a porous metal element. The first heating element 13 and the second heating element 14 can be curled in the shape of a rectangular sheet, and the combination part is formed by welding, forming a cylindrical heating net, and a welding part is formed at the welding position; or a metal wire can be directly woven into a cylindrical structure, and the cylindrical heating net has no joint and has good integrity.

[0053] Referring to Figures 2 to 5 , the bending angle of the atomization core 10 as a whole can be set to be between 180 degrees and 360 degrees. The bending angle of the atomization assembly 1 as a whole is greater than 300 degrees and less than 360 degrees. Referring to Figures 3 to 6, the first heating element 13 and the second heating element 14 adopt an integral molding structure, the first heating element 13 and the second heating element 14 are each provided with a first conductive pin 101, and the first heating element 13 and the second heating element 14 are provided with a second conductive pin 102 at a joint position, and the first heating element 13 and the second heating element 14 share the second conductive pin 102. The two share a conductive pin, which can save material usage, reduce production cost, reduce processing steps, and improve processing efficiency. When the first heating element 13 and the second heating element 14 adopt a mesh structure, the entire heating mesh can be folded in half at the middle position during specific processing, and then bent to a predetermined angle shape. Then, the second liquid guide 12 is placed between the first heating element 13 and the second heating element 14, and the joint bending position between the first heating element 13 and the second heating element 14 is arc-shaped. The atomization assembly 1 further comprises a retaining member 20 arranged on the peripheral side, the retaining member 20 is in a whole tubular shape, and a positioning strip 21 is vertically protruded on the inner wall surface of the retaining member 20. The two ends of the atomization core 10 after being curled in a whole can be in contact with the side surface of the corresponding side of the positioning strip 21, or part of the liquid guide in the atomization core 10 is in contact with the side surface of the corresponding side of the positioning strip 21. The retaining member 20 can be but not limited to a porous metal member, such as a porous metal member with a mesh structure.

[0054] Referring to Figures 2 to 4 , the side surface of the retaining member 20 is provided with an opening 22, the opening 22 is located on the opposite sides of the retaining member 20 relative to the positioning strip 21, and the opening 22 is arranged at an angle close to half of the retaining member 20, that is, the central angle of the opening 22 is close to 180 degrees, so that the aerosol substrate in the liquid storage cavity can directly contact the outer surface of the atomization core 10 through the opening 22, thereby improving the transmission efficiency.

[0055] Referring to Figures 2 to 5 , the atomization assembly 1 further comprises a base 30, the base 30 is located at the bottom end of the retaining member 20, the top surface of the base 30 has a width and a length greater than the outer diameter of the retaining member 20, and the retaining member 20 can be fixed at the central position of the base 30. The bottom end of the retaining member 20 is fixedly installed on the base 30, and the base 30 is provided with through holes for the conductive pins of the first heating element 13 and the second heating element 14 to extend out. There is a gap between the top surface of the base 30 and the atomization core 10, and the base 30 and the retaining member 20 can be assembled and fixed by clamping or other ways. The base 30 can adopt a rectangular structure, or a structure matched with the shell of the aerosol generating device, so that after the atomization assembly 1 is placed in the shell, the base 30 is easily fixed after being positioned and assembled with the shell, thereby improving the assembly efficiency of the product.

[0056] Referring to Figures 7 to 10, the atomization assembly 1 is also provided with a holder 20, and a center angle formed by two ends of a positioning strip 21 in the holder 20 is 180 degrees, that is, the positioning strip 21 is semicircular, when the atomization core 10 is assembled in the holder 20, each liquid guide piece of the atomization core 10 abuts against a side surface of a corresponding side of the positioning strip 21. The side surface of the holder 20 is also provided with an opening, the first heating piece 13 and the second heating piece 14 in the atomization core 10 share a second conductive pin 102, the holder 20 is fixedly installed with a base 30 at a bottom, and the first conductive pin 101 and the second conductive pin 102 pass through a bottom surface of the base 30.

[0057] It can be understood that when the atomization core 10 is bent at other angles, similar holders recorded in the above embodiments can also be used, and a corresponding size of the positioning strip is arranged on the inner wall surface of the holder, so that the atomization core 10 can maintain a stable bending angle after being assembled in the holder.

[0058] The embodiment of the present application provides an aerosol generating device, which comprises the atomization assembly 1 recorded in the above embodiments. The aerosol generating device further comprises a shell, the atomization assembly 1 is accommodated in the shell, and a liquid storage cavity for storing an aerosol substrate is arranged in the shell, and the liquid storage cavity is in communication with an outer surface of the first liquid guide piece 11 farthest from the second heating piece 14 in the atomization core 10.

[0059] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An atomising assembly characterised in that: The atomization core comprises at least two first liquid guides, a first heating element, a second liquid guide and a second heating element which are sequentially stacked, and the first liquid guides are used to transmit aerosol substrate to the second liquid guide; wherein the liquid transmission rate of the first liquid guides increases sequentially in the transmission direction of the aerosol substrate, and the liquid transmission rate of each first liquid guide is greater than the liquid transmission rate of the second liquid guide.

2. The atomization assembly of claim 1, wherein: The porosity of each first liquid guide increases sequentially in the transmission direction of the aerosol substrate, and the porosity of each first liquid guide is greater than the porosity of the second liquid guide.

3. The atomization assembly of claim 1, wherein: The heating temperature of the first heating element is less than the heating temperature of the second heating element.

4. The atomization assembly of claim 3, wherein: The heating temperature of the first heating element is set to 50-150 degrees, and the heating temperature of the second heating element is set to 150-350 degrees.

5. The atomization assembly of claim 3, wherein: The first heating element is configured to work earlier than the second heating element.

6. The atomizing assembly of any one of claims 1-5, wherein: The atomization core is in a flat and stacked structure or is curved into a cylindrical structure.

7. The atomizing assembly of any one of claims 1-5, wherein: The atomization assembly further comprises a cylindrical holder for maintaining the atomization core at a fixed curvature, the atomization core is accommodated in the holder, and the inner wall surface of the holder is in close contact with the outer wall surface of the outermost first liquid guide.

8. The atomization assembly of claim 7, wherein: The inner wall surface of the holder is vertically provided with a positioning strip, and the two ends of the curved atomization core are respectively in abutment with the side walls on the corresponding sides of the positioning strip.

9. The atomization assembly of claim 7, wherein: The atomization assembly further comprises a base provided at the bottom end of the holder, and one end of the holder is fixed on the base.

10. The atomization assembly of claim 1, wherein: The first liquid guide and the second liquid guide are both liquid-conducting cotton.

11. An aerosol-generating device comprising: The atomization assembly of any one of claims 1-10. The atomization assembly of any one of claims 1-10.

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