Ultrasonic atomization structure and electronic cigarette applying same

Abstract

The invention relates to the technical field of electronic atomization, in particular to an ultrasonic atomization structure for achieving large-area atomization of a liquid film through radial bending vibration of a cylinder wall and an electronic cigarette applying the ultrasonic atomization structure. The ultrasonic atomization structure comprises an atomization piece which is of a thin-walled cylinder structure, a micropore array is arranged on the cylinder wall of the atomization piece, and a cylinder cavity is formed in the inner side of the cylinder wall; the piezoelectric driving assembly comprises a first piezoelectric plate and a second piezoelectric plate which are arranged at an interval in the axial direction of the atomization part, and the first piezoelectric plate and the second piezoelectric plate are fixed to the outer side or the inner side of the cylinder wall of the atomization part; the liquid supply assembly is configured to guide liquid to the area where the micropore array is located and form a continuous liquid film on the surface of the cylinder wall; and the mist outlet channel interface is used for leading out aerosol generated by atomization of the micropore array. An annular high-amplitude band is formed through radial bending vibration of the cylinder wall, the effective area where micropores can be arranged is enlarged, large-area uniform atomization of a liquid film is achieved, the mist amount is remarkably increased, and the atomizer is better matched with high-viscosity tobacco tar.

Description

Technical Field

[0001] This invention relates to the field of electronic atomization technology, specifically to an ultrasonic atomization structure that utilizes radial bending vibration of the cylinder wall to atomize high-viscosity liquids, and an electronic cigarette using the same. Background Technology

[0002] Currently, e-cigarettes generally use an atomization heating structure to convert e-liquid into an aerosol for users to inhale. Common atomization methods include electric heating wire and ultrasonic microporous atomization.

[0003] Ultrasonic micropore atomization relies on piezoelectric elements to drive a vibrating plate, pushing liquid through micropores to form droplets, achieving efficient atomization at relatively low temperatures. However, most existing ultrasonic atomizers employ a flat-plate vibrating structure, which has limitations primarily in the following aspects:

[0004] ① The vibrating plate forms a local high amplitude zone in the central area, which limits the area where micropores can be arranged, resulting in insufficient atomization and the inability to atomize viscous e-liquid;

[0005] ②The vibration area is small, the liquid film thickness is uneven, the droplet size distribution is unstable, and the atomization efficiency is limited;

[0006] ③ It has poor adaptability to high-viscosity e-liquids and is prone to problems such as insufficient vapor production or unstable atomization. Summary of the Invention

[0007] I. Technical problems to be solved

[0008] The present invention aims to at least partially solve one of the above-mentioned technical problems.

[0009] II. Technical Solution

[0010] A first aspect of the present invention provides an ultrasonic atomization structure. The ultrasonic atomization structure includes:

[0011] The atomizing component is a thin-walled cylindrical structure with an array of micropores on its cylindrical wall and a cylindrical cavity formed on the inner side of the cylindrical wall.

[0012] The piezoelectric drive assembly includes a first piezoelectric sheet and a second piezoelectric sheet spaced apart along the axial direction of the atomizing element, the first and second piezoelectric sheets being fixed to the outer or inner side of the cylinder wall of the atomizing element;

[0013] The liquid supply assembly is configured to direct liquid to the area where the micropore array is located and form a continuous liquid film on the surface of the cylinder wall;

[0014] The mist outlet interface is used to export the aerosol generated by the micropore array atomization.

[0015] In this process, the liquid in the liquid supply assembly is introduced into a microporous array to form a liquid film; the first and second piezoelectric elements excite the atomizing element to generate radial bending vibration; the liquid film generates atomized aerosol under the radial bending vibration of the atomizing element, and the atomized aerosol is discharged from the mist outlet interface.

[0016] In some embodiments of the present invention, the piezoelectric drive assembly, the liquid supply assembly, and the atomizing element are arranged in one of the following two ways:

[0017] ① Liquid is absorbed from the periphery, while mist is emitted from the center;

[0018] The first and second piezoelectric elements are annular, with their inner sides fixed to the cylinder wall of the atomizing element; the liquid supply assembly is arranged around the outer periphery of the atomizing element, and the cylinder cavity inside the atomizing element forms a mist outlet channel;

[0019] ② Liquid is absorbed from the center, and mist is emitted from the periphery;

[0020] The first and second piezoelectric sheets are sheet-shaped, and their outer sides are fixed to the cylinder wall of the atomizing element; the liquid supply assembly is located in the cylinder cavity inside the atomizing element, and a mist outlet channel is formed between the outer periphery of the atomizing element and the outer cylinder.

[0021] In some embodiments of the present invention, the piezoelectric drive assembly, the liquid supply assembly, and the atomizing element are arranged in the first type, wherein the atomizing element is a thin-walled cylinder; the first and second piezoelectric sheets are annular; the second piezoelectric sheet and the first annular piezoelectric sheet are symmetrically arranged on both sides of the atomizing element; and the inner diameter of the first and second piezoelectric sheets is less than or equal to the diameter of the cylinder surface of the atomizing element.

[0022] In some embodiments of the present invention, the atomizing element and the first and second piezoelectric sheets are fixed in one of the following two ways: ① the inner diameter of the first and second piezoelectric sheets is smaller than the diameter of the cylinder surface of the atomizing element, and the first and second piezoelectric sheets are pasted and fixed to the cylinder walls on both sides of the atomizing element; or ② the inner diameter of the first and second piezoelectric sheets is equal to the diameter of the cylinder surface of the atomizing element, and the atomizing element is embedded and fixed to the inner side of the first and second piezoelectric sheets.

[0023] In some embodiments of the present invention, the atomizing element is fixed to the first and second piezoelectric sheets in the second manner, wherein the diameter of the cylindrical surface of the atomizing element is between 10 mm and 20 mm; the outer diameter of the first and second piezoelectric sheets is between 10 and 20 mm; and the inner diameter is between 5 and 10 mm.

[0024] In some embodiments of the present invention, the first piezoelectric element and the second piezoelectric element have the same driving phase or have an adjustable phase difference.

[0025] In some embodiments of the present invention, the first annular piezoelectric sheet and the second piezoelectric sheet are both made of PZT piezoelectric ceramic.

[0026] In some embodiments of the present invention, the atomizing element is a thin-walled cylinder.

[0027] In some embodiments of the present invention, the atomizing element is made of stainless steel with a thickness between 0.1 mm and 1 mm.

[0028] In some embodiments of the present invention, the height of the atomizing element is between 5 and 20 mm.

[0029] In some embodiments of the present invention, the micropore array is disposed in the high amplitude zone of the atomizing element in the working state, and the high amplitude zone is located at the axial middle position of the cylinder wall of the atomizing element.

[0030] In some embodiments of the present invention, the micropores in the micropore array are tapered through-holes. For the tapered through-holes, the opening facing the liquid supply component is smaller than the opening away from the liquid supply component, and the diameter of the tapered through-hole is between 4-8 μm.

[0031] In some embodiments of the present invention, the micropore array continuously covers the surrounding area of ​​the liquid supply component.

[0032] In some embodiments of the present invention, the micropore array is uniformly arranged along the circumferential direction; the pore density of the micropore array near the axial center of the atomizing element is greater than the pore density away from the axial center of the atomizing element; and / or,

[0033] In some embodiments of the present invention, the liquid supply component is absorbent cotton.

[0034] In some embodiments of the present invention, a rectifier is provided between the mist outlet interface and the cylinder cavity of the atomizing element.

[0035] In some embodiments of the present invention, the atomizing element is provided with supporting sealing structures at both axial ends; the liquid supply assembly includes a liquid suction structure, which is in line or surface contact with the cylinder wall in the micropore array region and is constrained by the supporting sealing structure to form a liquid supply cavity.

[0036] A second aspect of the present invention provides an electronic cigarette. The electronic cigarette includes:

[0037] In the ultrasonic atomization structure described above, the liquid in the liquid supply component is e-liquid.

[0038] E-liquid preheating unit is used to preheat the e-liquid in the liquid supply unit or before it enters the liquid supply unit;

[0039] An electronically controlled power supply component is connected to the e-liquid preheating component and the piezoelectric drive component, respectively, to provide energy to the e-liquid preheating component and to provide driving excitation to the first and second piezoelectric elements.

[0040] The preheating components are arranged along the axial length of the atomizing element.

[0041] In some embodiments of the present invention, the device further includes: a sensor group, comprising: a temperature sensor for detecting the temperature of the e-liquid; a mist output sensor for detecting the mist output of the ultrasonic atomizing structure; and an electronically controlled power supply component electrically connected to the temperature sensor and the mist output sensor, which adjusts the preheating power of the preheating component and the driving parameters of the first annular piezoelectric element and the second piezoelectric element based on real-time feedback closed-loop adjustment of the e-liquid temperature and the mist output.

[0042] III. Beneficial Effects

[0043] As can be seen from the above technical solution, the present invention has at least one of the following beneficial effects compared to the prior art:

[0044] (1) A ring-shaped high amplitude band is formed by radial bending vibration of the cylinder wall, which expands the effective area where micropores can be arranged, realizes large-area uniform atomization of liquid film, significantly improves mist volume, and is better adapted to high viscosity e-liquid.

[0045] (2) The micropore array is distributed in the high amplitude zone, and the pore size and density design ensures that the droplets are fine and uniform, overcoming the defect of unstable particle size in traditional flat atomizers.

[0046] (3) The dual piezoelectric elements are arranged symmetrically, and the driving phase is adjustable, which can expand the range of vibration modes and improve the atomization flux and energy utilization.

[0047] (4) The liquid supply component is combined with the support and sealing structure to ensure centralized liquid supply, prevent leakage and waste, and improve the stability of liquid supply.

[0048] (5) The mist outlet interface, in conjunction with the rectifier component, ensures that the aerosol is stably discharged along the axial direction, improving the user's inhalation experience.

[0049] (6) In electronic cigarette applications, by using e-liquid preheating and sensor closed-loop control, the system can adapt to high-viscosity e-liquids and maintain a constant vapor output, significantly improving the user experience and intelligence level. Attached Figure Description

[0050] Figure 1A and Figure 1B These are the front view and side view of the ultrasonic atomization structure according to an embodiment of the present invention.

[0051] Figure 2 This is a simulation diagram of the ultrasonic micropore atomization vibration mode of a single piezoelectric ceramic sheet in the existing technology.

[0052] Figure 3 Figure 1 shows a simulation diagram of the ultrasonic micropore atomization vibration mode in the ultrasonic atomization structure. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0054] The first aspect of the present invention provides an ultrasonic atomization structure. Figure 1A and Figure 1B These are the front view and side view of the ultrasonic atomization structure according to an embodiment of the present invention. As shown in the figures, the ultrasonic atomization structure of this embodiment includes: an atomizing element 1, a piezoelectric drive assembly 2, a liquid supply assembly 3, and a mist outlet interface 4. The atomizing element 1 is a thin-walled cylindrical structure with a micropore array on its wall and a cavity formed inside the wall. The piezoelectric drive assembly 2 includes a first piezoelectric element 21 and a second piezoelectric element 22 spaced apart along the axial direction of the atomizing element. The liquid supply assembly 3 is configured to guide liquid to the micropore array region of the atomizing element and form a liquid film on the surface of the cylinder wall. The mist outlet interface 4 communicates with the cylinder cavity and is used to export aerosol.

[0055] During operation, the liquid is guided to the micropore array region to form a liquid film under the action of the liquid supply component 3. The first and second piezoelectric plates excite the atomizing component 1 to generate radial bending vibration. The liquid film at the high amplitude zone is atomized into aerosol and discharged through the mist outlet interface 4.

[0056] (a) Atomizing components

[0057] The atomizing component 1 is a thin-walled cylinder with a diameter of 10-20 mm, a wall thickness of 0.1-1 mm, a height of 5-20 mm, and is made of stainless steel.

[0058] Under piezoelectric excitation, the atomizing element undergoes radial bending vibration, forming a high-amplitude band in its axial center. The micropore array 5 is arranged in this region to ensure that the liquid film has the highest atomization efficiency at the position of maximum amplitude.

[0059] In the micropore array, the micropores are preferably conical through-holes with a diameter of 4–8 μm, and the pore openings are smaller on the side facing the liquid supply component than on the side away from the liquid supply component. The micropore array can be uniformly arranged or designed with a density gradient according to the amplitude distribution to obtain aerosols with uniform particle size.

[0060] (II) Piezoelectric drive assembly

[0061] The piezoelectric drive assembly 2 includes a first piezoelectric element 21 and a second piezoelectric element 22, which are spaced apart along the axial direction of the atomizing element and symmetrically arranged on both sides of the cylinder wall. Preferably, the piezoelectric element is an annular piezoelectric element with an outer diameter of 10-20 mm and an inner diameter of 5-10 mm, and is made of PZT ceramic.

[0062] Fixing methods include:

[0063] ① When the inner diameter is smaller than the cylinder surface diameter, the piezoelectric sheet is pasted and fixed to the outside of the cylinder wall;

[0064] ② When the inner diameter is equal to the diameter of the cylinder surface, the atomizing element is embedded and fixed inside the piezoelectric sheet.

[0065] In terms of driving method, the two piezoelectric plates can be driven in the same phase, or an adjustable phase difference can be set. By adjusting the phase and frequency, the coverage range of the high amplitude band can be widened, and the atomization flux can be improved.

[0066] (III) Liquid Supply Components

[0067] The liquid supply assembly 3 is used to guide the liquid to the micropore array region of the atomizing element 1 and form a liquid film on the cylinder wall surface. Preferably, it is absorbent cotton, which forms line contact or surface contact with the atomizing element 1 in the micropore array region.

[0068] The atomizing element has supporting and sealing structures at both ends to limit the liquid to act in a concentrated manner within the high amplitude band, forming a stable liquid supply chamber and preventing liquid leakage or waste.

[0069] In terms of specific layout, the liquid supply assembly and the mist outlet channel interface can be configured in two topologies:

[0070] ① Liquid is absorbed from the periphery, and mist is emitted from the center:

[0071] The liquid supply component is arranged around the outer periphery of the atomizing element. The liquid enters the cylinder cavity through micropores and is discharged as aerosol in the central channel.

[0072] ② Liquid is absorbed from the center, and mist is emitted from the periphery:

[0073] The liquid supply assembly is located inside the atomizing element's cylinder cavity. Liquid is guided from the center to the cylinder wall, while aerosol is discharged through the gap between the outer periphery of the atomizing element and the outer cylinder. At this time, the orifice of the conical through-hole facing the liquid supply assembly is larger than the side away from the liquid supply assembly, which facilitates the liquid entering the micropore from the larger internal orifice side and exiting as mist from the smaller orifice side towards the outer periphery.

[0074] (iv) Fog outlet channel interface

[0075] The mist outlet interface 4 is connected to the cylinder cavity of the atomizing element 1 for discharging aerosol. Preferably, a flow straightening component is provided between the interface and the cylinder cavity to direct the aerosol output axially, reduce turbulence and backflow, and ensure stable output.

[0076] Figure 2 This is a simulation diagram of the ultrasonic microporous atomization vibration mode of a single piezoelectric ceramic sheet using existing technology. (Example:) Figure 2 As shown, one drawback of ultrasonic microporous atomization is its small atomization volume. This is mainly because when a thin plate with micropores bends and vibrates, only the central area experiences bending and vertical vibration. Atomization can only occur in this area, thus limiting the atomization area and volume. Using ultrasonic microporous atomization to manufacture electronic cigarettes inevitably leads to the problem of viscous e-liquid failing to atomize, resulting in insufficient vapor production.

[0077] Figure 3 Figure 1 shows a simulation diagram of the ultrasonic micropore atomization vibration mode in the ultrasonic atomization structure. Figure 3 As shown in the figure, in this embodiment, the bending vibration of the thin plate is replaced with the radial bending vibration of the cylinder, increasing the area of ​​the atomization region. As shown in the figure below, two annular piezoelectric ceramic plates excite the cylindrical thin plate; the darker areas indicate areas of greater vibration. Micropores are drilled in these areas, and atomization occurs through these micropores. Since micropores can be drilled over a larger area, the atomization volume is inevitably increased. Simultaneously, the ultrasonic power is also greater due to the two ceramic plates driving the atomization, making it easier to atomize viscous e-liquid and significantly increasing the vapor production.

[0078] In summary, this invention features a micropore array arranged in the high-amplitude zone of the atomizing element cylinder wall and uses dual piezoelectric excitation to achieve large-area atomization of the liquid film with sufficient mist volume; the liquid supply and sealing structure of the absorbent cotton ensure that the liquid is concentrated on the atomization area, and the atomization process is stable; the mist flow is discharged through the rectifying component, resulting in fine and uniform mist droplets.

[0079] In another embodiment of the present invention, the ultrasonic atomization structure of the present invention is applied to an electronic cigarette device. The electronic cigarette includes a shell, a liquid storage chamber, an air path system, a vapor outlet, an ultrasonic atomization structure, an e-liquid preheating component, an electronic control power supply component, and a sensor group.

[0080] Preferably, the electronic cigarette includes: an e-liquid preheating component 7, which is arranged along the axial direction of the atomizing component and thermally coupled with the liquid supply component, forming a temperature gradient upstream of the micropore array to reduce the viscosity of the high-viscosity e-liquid.

[0081] Furthermore, the e-cigarette includes temperature and vapor output sensors to monitor e-liquid temperature and vapor output in real time. Based on sensor feedback, the electronic control power supply component uses a closed-loop adjustment mechanism to regulate piezoelectric drive parameters and preheating power, solving the problem of poor compatibility with high-viscosity e-liquids and ensuring a constant vapor output. This overall improves the performance and user experience of the e-cigarette.

[0082] Please refer to Figure 1A , Figure 1B In the electronic cigarette device, the liquid storage chamber provides e-liquid 9 to the liquid supply component; the bottom of the housing has an air inlet 8 on the inner side of the liquid storage chamber; the e-liquid preheating component 7 preheats the e-liquid, reducing the viscosity of the high-viscosity e-liquid; the micropore array 5 of the atomizing component contacts the liquid supply component 3, causing the e-liquid to form a liquid film at the high amplitude zone; the piezoelectric drive component 2 works under the drive of the electronically controlled power supply component, atomizing the liquid film into aerosol smoke 6, which is introduced into the air path through the mist outlet interface 4 and finally discharged from the mist outlet.

[0083] This concludes the description of the various embodiments of the present invention. Based on the above description, those skilled in the art should have a clear understanding of the present invention.

[0084] It should be noted that for certain implementation methods, if they are not the key content of this invention and are well known to those skilled in the art, they are not described in detail in the accompanying drawings or text due to space limitations. In such cases, they can be understood by referring to the relevant prior art.

[0085] Unless explicitly stated otherwise, the numerical values ​​and ranges mentioned in this invention are approximate and can be changed according to the content of this invention. Specifically, all figures in the specification and claims indicating the content of composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases, meaning that they include variations of a specific amount by ±50% in some embodiments.

[0086] The directional terms used in this invention, such as "center," "lateral," "longitudinal," "top," "bottom," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," indicate only the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the purpose of facilitating and simplifying the description of this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. Also, the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but are only illustrative of embodiments of this invention.

[0087] The terms "connected" and "linked" used in this invention should be interpreted broadly unless otherwise explicitly specified and limited. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection of a portion of two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0088] Those skilled in the art will understand that in the claims and specification of this invention, the word "comprising" does not exclude the presence of elements (or steps) not listed in the claims. The word "a" or "an" preceding an element (or step) does not exclude the presence of a plurality of such elements (or steps).

[0089] Furthermore, the above embodiments are provided only to enable the invention to meet legal requirements, and the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0090] Similarly, it should be understood that, for the sake of brevity, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of invention should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, the various inventive aspects consist of fewer than all the features of the preceding single embodiment. Furthermore, embodiments may be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0091] The above specific embodiments have provided a detailed description of the purpose, technical means, and beneficial effects of the present invention. It should be understood that the purpose of the detailed description is to enable those skilled in the art to better understand the present invention, and it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrasonic atomizing structure, characterized in that, include: The atomizing component is a thin-walled cylindrical structure with an array of micropores on its cylindrical wall and a cylindrical cavity formed on the inner side of the cylindrical wall. The piezoelectric drive assembly includes a first piezoelectric sheet and a second piezoelectric sheet spaced apart along the axial direction of the atomizing element, the first and second piezoelectric sheets being fixed to the outer or inner side of the cylinder wall of the atomizing element; The liquid supply assembly is configured to direct liquid to the region where the micropore array is located and form a continuous liquid film on the surface of the cylinder wall; The mist outlet interface is used to export the aerosol generated by the atomization of the micropore array; In this process, the liquid in the liquid supply assembly is introduced into a microporous array to form a liquid film; the first and second piezoelectric elements excite the atomizing element to generate radial bending vibration; the liquid film generates atomized aerosol under the radial bending vibration of the atomizing element, and the atomized aerosol is discharged from the mist outlet interface.

2. The ultrasonic atomization structure according to claim 1, characterized in that, The piezoelectric drive assembly, liquid supply assembly, and atomizing element are arranged in one of the following two ways: ① Liquid is absorbed from the periphery, while mist is emitted from the center; The first and second piezoelectric elements are annular, and their inner sides are fixed to the cylinder wall of the atomizing element; the liquid supply assembly is arranged around the outer periphery of the atomizing element, and the cylinder cavity inside the atomizing element forms a mist outlet channel; ② Liquid is absorbed from the center, and mist is emitted from the periphery; The first and second piezoelectric sheets are sheet-shaped, and their outer sides are fixed to the cylinder wall of the atomizing element; the liquid supply assembly is disposed in the cylinder cavity inside the atomizing element, and a mist outlet channel is formed between the outer peripheral side of the atomizing element and the outer cylinder.

3. The ultrasonic atomization structure according to claim 2, characterized in that, The arrangement of the piezoelectric drive assembly, the liquid supply assembly, and the atomizing element is the first type, wherein, The atomizing element is a thin-walled cylinder; The first and second piezoelectric elements are in the shape of a ring; The second piezoelectric element and the first annular piezoelectric element are symmetrically arranged on both sides of the atomizing element; The inner diameters of the first and second piezoelectric elements are less than or equal to the diameter of the cylindrical surface of the atomizing element.

4. The ultrasonic atomization structure according to claim 3, characterized in that, The atomizing element is fixed to the first and second piezoelectric sheets in one of the following two ways: ① The inner diameters of the first and second piezoelectric elements are smaller than the diameter of the cylinder surface of the atomizing element, and the first and second piezoelectric elements are adhered and fixed to the cylinder walls on both sides of the atomizing element; or, ②The inner diameter of the first and second piezoelectric sheets is equal to the diameter of the cylindrical surface of the atomizing element, and the atomizing element is embedded and fixed inside the first and second piezoelectric sheets.

5. The ultrasonic atomizing structure according to claim 4, characterized in that, The atomizing element is fixed to the first and second piezoelectric sheets in the second manner, wherein, The diameter of the atomizing element's cylindrical surface is between 10mm and 20mm; the outer diameter of the first and second piezoelectric sheets is between 10mm and 20mm; the inner diameter is between 5mm and 10mm; and / or, The first and second piezoelectric elements are driven in the same phase or have an adjustable phase difference; and / or, The first annular piezoelectric sheet and the second piezoelectric sheet are both made of PZT piezoelectric ceramic.

6. The ultrasonic atomization structure according to claim 3, characterized in that, The atomizing element is a thin-walled cylinder; and / or, The atomizing element is made of stainless steel with a thickness between 0.1 mm and 1 mm; and / or, The height of the atomizing element is between 5 and 20 mm.

7. The ultrasonic atomization structure according to claim 3, characterized in that, The micropore array is disposed in the high-amplitude zone of the atomizing element during operation, and the high-amplitude zone is located at the axial midpoint of the atomizing element's cylinder wall; and / or, The micropores in the micropore array are tapered through-holes. For each tapered through-hole, the orifice facing the liquid supply component is smaller than the orifice away from the liquid supply component, and the diameter of the tapered through-hole is between 4-8 μm; and / or, The micropore array continuously covers the surrounding area of ​​the liquid supply component; and / or, The micropore array is uniformly arranged along the circumferential direction; the pore density of the micropore array near the axial center of the atomizing element is greater than the pore density away from the axial center of the atomizing element; and / or, The liquid supply component is absorbent cotton; and / or, A rectifier is provided between the mist outlet interface and the cylinder cavity of the atomizing element.

8. The ultrasonic atomization structure according to claim 3, characterized in that, The atomizing element is provided with a support and sealing structure at both ends of its axial direction; The liquid supply assembly includes a liquid suction structure that is in line or surface contact with the cylinder wall in the micropore array region and is constrained by the supporting sealing structure to form a liquid supply cavity.

9. An electronic cigarette, characterized in that, include: In the ultrasonic atomizing structure as described in any one of claims 1 to 8, the liquid in the liquid supply assembly is e-liquid; E-liquid preheating unit is used to preheat the e-liquid in the liquid supply unit or before it enters the liquid supply unit; An electronically controlled power supply component is connected to the e-liquid preheating component and the piezoelectric drive component, respectively, to provide energy to the e-liquid preheating component and to provide driving excitation to the first piezoelectric element and the second piezoelectric element. The preheating component is arranged along the axial length of the atomizing element.

10. The electronic cigarette according to claim 9, characterized in that, It also includes: a sensor array, including: a temperature sensor for detecting the temperature of the e-liquid; and a mist output sensor for detecting the mist output of the ultrasonic atomization structure. The electronically controlled power supply component is electrically connected to the temperature sensor and the mist output sensor. Based on the real-time feedback of the e-liquid temperature and the mist output, the preheating power of the preheating component and the driving parameters of the first annular piezoelectric element and the second piezoelectric element are adjusted in a closed loop.

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