Ultrasonic atomizing sheet, atomizer and aerosol generating device

Abstract

The embodiment of the present application provides an ultrasonic atomization piece, an atomizer and an aerosol generating device. The ultrasonic atomization piece comprises a piezoelectric ceramic and a metal microporous sheet. The middle region of the piezoelectric ceramic has a through hole. The metal microporous sheet comprises a flat plate part and a convex part. The flat plate part is attached to the piezoelectric ceramic, the convex part corresponds to the through hole, and the convex direction of the convex part is away from the through hole. The convex part is provided with a plurality of through micropores. The micropore comprises a liquid suction port on the side away from the piezoelectric ceramic and a mist outlet port on the side facing the piezoelectric ceramic. The metal microporous sheet atomizes the aerosol generating substrate into aerosol during vibration. The micropore comprises at least two micropore sections. The at least two micropore sections are sequentially communicated. In the direction from the side away from the piezoelectric ceramic to the side facing the piezoelectric ceramic, the equivalent pore diameter of the micropore section decreases, and a step surface is formed between the adjacent two micropore sections. The ultrasonic atomization piece provided by the embodiment of the present application can balance the particle size and atomization amount of the aerosol, and improve the user experience.

Description

Technical Field

[0001] This application relates to the field of atomization technology, and in particular to an ultrasonic atomizing plate, an atomizer, and an aerosol generating device. Background Technology

[0002] Aerosol generating devices typically include an atomizer and a power supply component electrically connected to the atomizer. Under the electric drive of the power supply component, the atomizer can atomize the aerosol generating matrix stored in the liquid storage chamber by ultrasonic atomization or by heating without combustion to form an aerosol for user use.

[0003] In related technologies, the particle size of the aerosol formed after atomization is related to the user's inhalation experience. In the development of aerosol generation devices, how to balance the particle size and atomization amount of aerosol is one of the research directions of the industry. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide an ultrasonic atomizing plate, an atomizer, and an aerosol generating device that can take into account both the particle size and atomization amount of the aerosol.

[0005] Therefore, a first aspect of the embodiments of this application provides an ultrasonic atomizing sheet, comprising:

[0006] Piezoelectric ceramics, with a clearance through-hole in the middle region;

[0007] A metal microporous sheet includes a flat plate portion and a protruding portion; the flat plate portion is attached to the piezoelectric ceramic, the protruding portion corresponds to the clearance through hole, the protruding direction of the protruding portion is opposite to the clearance through hole, the protruding portion is provided with a plurality of through micropores, the micropores include a liquid suction port on the side away from the piezoelectric ceramic and a mist outlet on the side facing the piezoelectric ceramic, the metal microporous sheet atomizes the aerosol generation matrix into aerosol during vibration;

[0008] The micropores include at least two micropore segments that are connected in sequence. The equivalent pore diameter of each micropore segment decreases along the direction from the side away from the piezoelectric ceramic to the side facing the piezoelectric ceramic, and a step surface is formed between two adjacent micropore segments.

[0009] In some embodiments, the at least two microporous segments include a first microporous segment and a second microporous segment, a first stepped surface is formed between the first microporous segment and the second microporous segment, one end of the first microporous segment extends to the first stepped surface, and the end away from the first stepped surface forms the liquid suction port, one end of the second microporous segment extends to the first stepped surface and forms a communication port, and the end away from the first stepped surface forms the mist outlet.

[0010] In some embodiments, the metal microporous sheet has a thickness dimension of H, and the depth of the first microporous segment is H1, wherein the ratio of H1 to H is in the range of 0.5 to 0.8.

[0011] In some embodiments, the equivalent aperture of the suction port is D1, and the equivalent diameter of the first step surface is D2, wherein the ratio of D2 to D1 is in the range of 0.7 to 1.

[0012] In some embodiments, the equivalent pore size of the suction port is D1, which is in the range of 20 μm to 150 μm.

[0013] In some embodiments, the equivalent aperture of the mist outlet is D3, which is in the range of 1.1 μm to 2.0 μm.

[0014] In some embodiments, the equivalent aperture of the mist outlet is D3, and the equivalent aperture of the connecting port is D4, wherein the ratio of D3 to D4 is in the range of 0.04 to 1.

[0015] In some embodiments, the height of the protrusion in the thickness direction of the metal microporous sheet is H2, where H2 is greater than 0 and less than or equal to 2 mm.

[0016] In some embodiments, the equivalent diameter of the first step surface is D2, and the equivalent aperture of the connecting port is D4, wherein the ratio of D4 to D2 is in the range of 0.2 to 0.5.

[0017] In some embodiments, the metal microporous sheet has a thickness dimension of H, which is in the range of 0.01 mm to 1.0 mm.

[0018] In some embodiments, on a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the orthographic projection of the metal microporous sheet is D5, and D5 is in the range of 7mm to 50mm.

[0019] In some embodiments, the protrusion has a spherical crown-like outline and includes a micropore region with the micropores formed therein. On a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the projection of the micropore region is D6, which is in the range of 2 mm to 30 mm.

[0020] In some embodiments, the spacing between adjacent micropores is L1, which is in the range of 20 μm to 300 μm.

[0021] In some embodiments, the number of micropores ranges from 100 to 3000.

[0022] A second aspect of this application provides an atomizer, including the ultrasonic atomizing plate described above.

[0023] A third aspect of this application provides an aerosol generating apparatus, including a power supply component and an atomizer as described in any embodiment of this application, wherein the power supply component is electrically connected to the atomizer.

[0024] The ultrasonic atomizing sheet in this embodiment includes a piezoelectric ceramic and a metal microporous sheet. The metal microporous sheet has protrusions, which on the one hand improves the structural strength of the metal microporous sheet and reduces the risk of damage during vibration; on the other hand, the protrusions are oriented away from the through-holes, meaning the ultrasonic atomizing sheet can contact the liquid guide of the atomizer through the protrusions. This allows the liquid guide to supply liquid to the protrusions while simultaneously reducing the contact area between the ultrasonic atomizing sheet and the liquid guide, thus reducing the stress on the ultrasonic atomizing sheet and the loss of mechanical energy due to vibration, and improving atomization efficiency. Furthermore, given a fixed equivalent aperture for the mist outlet and the liquid inlet... In this case, by setting the micropores to include at least two micropore segments, with a stepped surface formed between adjacent micropore segments, the volume of the micropores can be increased compared to micropores without a stepped surface. Therefore, during the vibration of the ultrasonic atomizing plate, the deformation of the ultrasonic atomizing plate is large, which can squeeze the aerosol generation matrix in the micropores to the mist outlet for atomization, thus increasing the atomization amount. At the same time, since more aerosol generation matrix can be stored in the micropores, it is beneficial to further increase the atomization amount. In other words, it is not necessary to increase the equivalent pore size of the mist outlet to increase the atomization amount, thus taking into account both the aerosol particle size and the atomization amount, improving the user experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the aerosol generating device in some embodiments of this application;

[0026] Figure 2 for Figure 1 A sectional view;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of the ultrasonic atomizing sheet in some embodiments of this application;

[0029] Figure 5 for Figure 4 A sectional view;

[0030] Figure 6 This is a schematic diagram of the structure of micropores in some embodiments of this application.

[0031] Explanation of reference numerals in the attached figures

[0032] 10. Atomizing seat; 11. Atomizing chamber; 12. Liquid inlet channel; 20. Ultrasonic atomizing plate; 21. Metal microporous plate; 211. Protrusion; 212. Microporous area; 213. Flat plate; 22. Piezoelectric ceramic; 221. Clearance through hole; 23. Micropore; 231. First microporous section; 232. Second microporous section; 233. Liquid suction port; 234. Mist outlet; 235. Connecting port; 236. First stepped surface; 30. Housing assembly; 31. Gas outlet channel; 40. Liquid storage chamber; 50. Power supply assembly; 1000. Aerosol generating device. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first," "second," "third," and "fourth" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0036] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. Unless otherwise specified, all embodiments and optional embodiments of this application may be combined with each other to form new technical solutions. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments. Unless otherwise specified, all technical features and optional technical features of this application may be combined with each other to form new technical solutions.

[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0038] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "projection" refers to an orthographic projection in which parallel projection lines are perpendicular to the projection plane.

[0042] The following is a detailed description of this application.

[0043] like Figure 1 and Figure 2 As shown, this application provides an aerosol generating device 1000, which includes an atomizer and a power supply assembly 50 according to any embodiment of this application. The power supply assembly 50 is electrically connected to the atomizer.

[0044] The aerosol generating device 1000 is used to atomize an aerosol generating matrix to generate aerosols for user use. The aerosol generating matrix includes, but is not limited to, pharmaceuticals, nicotine-containing materials, or nicotine-free materials. In embodiments of this application, the aerosol generating matrix may, for example, be a liquid material made primarily of plants (e.g., tobacco) with added aerosol forming agents and aroma materials.

[0045] The power supply assembly 50 is electrically connected to the atomizer. The power supply assembly 50 is mainly used to supply power to the atomizer and control the opening and closing of the entire aerosol generating device 1000.

[0046] Those skilled in the art will understand that the embodiments of this application do not specifically limit the type of aerosol generating device 1000. For example, the aerosol generating device 1000 may be a medical nebulizer, an air humidifier, or an electronic cigarette, or other device that requires the use of a nebulizer.

[0047] This application provides an atomizer, which includes an ultrasonic atomizing plate 20 according to any embodiment of this application.

[0048] like Figures 3 to 6 As shown in the figure, this application embodiment provides an ultrasonic atomizing sheet 20. The ultrasonic atomizing sheet 20 includes a piezoelectric ceramic 22 and a metal microporous sheet 21. The piezoelectric ceramic 22 has a clearance through hole 221 in its middle region. The metal microporous sheet 21 includes a flat plate portion 213 and a protrusion portion 211. The flat plate portion 213 is attached to the piezoelectric ceramic 22, and the protrusion portion 211 corresponds to the clearance through hole 221, with the protrusion direction of the protrusion portion 211 facing away from the clearance through hole 221. The protrusion portion 211 is provided with a plurality of through micropores 23, and the micropores 23 include a liquid suction port 233 on the side away from the piezoelectric ceramic 22 and a mist outlet 234 on the side facing the piezoelectric ceramic 22. During vibration, the metal microporous sheet 21 atomizes the aerosol generation matrix into an aerosol. The micropore 23 includes at least two micropore segments 23, which are connected in sequence. Along the direction from the side away from the piezoelectric ceramic 22 to the side facing the piezoelectric ceramic 22, the equivalent pore diameter of the micropore segment 23 decreases, and a step surface is formed between two adjacent micropore segments 23.

[0049] Here, the equivalent diameter refers to the diameter of a non-circular object whose area is the same as that of a circular object. Of course, the equivalent diameter of a circular object is the diameter of its projection.

[0050] Here, the equivalent aperture refers to the diameter of a non-circular hole with the same area as a circular hole. Of course, the equivalent diameter of a circular hole is the same as the aperture of the circular hole.

[0051] For example, please refer to Figures 1 to 3 The atomizer includes a housing assembly 30, an atomizer base 10, and an atomizer core.

[0052] For example, please refer to Figures 2 to 3 The housing assembly 30 has an air outlet channel 31 that extends along the height direction of the atomizer.

[0053] The air outlet passage 31 can be located in the middle area inside the housing assembly 30, or it can be located on the side of the middle area of ​​the housing assembly 30.

[0054] The aerosol formed by atomization can flow through the air outlet channel 31 and be discharged to the outside for user use through the air outlet.

[0055] For example, at least a portion of the atomizing base 10 is disposed within the housing assembly 30. The housing assembly 30 contains a liquid storage chamber 40 for storing the aerosol generation matrix. The atomizing base 10 has an atomizing chamber 11 and a liquid inlet channel 12. The atomizing chamber 11 communicates with the gas outlet channel 31, and the liquid inlet of the liquid inlet channel 12 communicates with the liquid storage chamber 40.

[0056] For example, the atomizing core includes a liquid guiding element and an ultrasonic atomizing plate 20, and the liquid outlet of the liquid inlet channel 12 is in liquid communication with the liquid guiding element. The ultrasonic atomizing plate 20 is located on the top side of the liquid guiding element and protrudes towards the side of the liquid guiding element to form a protrusion 211.

[0057] For example, please refer to Figures 2 to 3 The atomizing core includes an ultrasonic atomizing plate 20. That is, the atomizing core does not have a liquid guiding component, and the liquid outlet of the liquid inlet channel 12 is directly connected to the liquid protrusion 211 of the ultrasonic atomizing plate 20.

[0058] The housing assembly 30 may have a liquid storage chamber 40 inside, which may be defined by the housing assembly 30 or by the housing assembly 30 and the atomizing seat 10.

[0059] The housing assembly 30 is the outer housing of the atomizer, and an air outlet channel 31 is formed inside it. At least a portion of the atomizer seat 10 is disposed within the housing assembly 30.

[0060] In this embodiment, the top of the atomizing seat 10 and the inner sidewall of the housing assembly 30 define a liquid storage chamber 40 for storing the aerosol generation matrix, and the liquid storage chamber 40 is arranged around the gas outlet channel 31.

[0061] In other embodiments, a liquid reservoir 40 may be formed inside the housing assembly 30.

[0062] For example, the fact that at least a portion of the atomizer seat 10 is disposed within the housing assembly 30 can mean that a portion of the structure of the atomizer seat 10 is disposed within the housing assembly 30, or it can mean that the entire structure of the atomizer seat 10 is disposed within the housing assembly 30.

[0063] For example, the atomizing base 10 has an air intake channel that connects to the outside and the atomizing chamber 11.

[0064] For example, please refer to Figures 2 to 3 The atomizing base 10 has an atomizing chamber 11 and a liquid inlet channel 12. The liquid inlet channel 12 is connected to the ultrasonic atomizing plate 20, and the atomizing chamber 11 is connected to the air outlet channel 31. The aerosol generating matrix in the liquid storage chamber 40 enters the atomizing core through the liquid inlet channel 12 for atomization. The atomized aerosol flows through the air outlet channel 31 along with the air flowing in through the air inlet channel and is discharged to the outside through the air outlet for user use.

[0065] The atomizing core is used to absorb the aerosol generating matrix and atomize the aerosol generating matrix to form an aerosol. The atomizing core is disposed in the atomizing seat 10 and includes an ultrasonic atomizing plate 20, which is located between the atomizing chamber 11 and the liquid outlet of the liquid inlet channel 12 and blocks the liquid outlet of the liquid inlet channel 12.

[0066] The piezoelectric ceramic 22 has a clearance through-hole 221 in its middle region, which is used to avoid the liquid outlet. The micropores 23 of the ultrasonic atomizing plate 20 are provided on the protrusion 211 and are located within the range of the clearance through-hole 221. When the atomizer is in operation, the piezoelectric ceramic 22 will undergo mechanical deformation with changes in voltage and frequency, thereby atomizing the aerosol generation matrix of the liquid inlet channel 12 into aerosol during vibration.

[0067] Please see Figure 5 The metal microporous sheet 21 includes a flat plate portion 213 and a protrusion portion 211. The flat plate portion 213 is bonded to the piezoelectric ceramic 22.

[0068] For example, the plate portion 213 of the metal microporous sheet 21 can be bonded to the bottom side of the piezoelectric ceramic 22 using a conductive adhesive. Alternatively, the plate portion 213 of the metal microporous sheet 21 can be bonded to the bottom side of the piezoelectric ceramic 22 using an epoxy resin adhesive.

[0069] For example, the protrusion direction of the protrusion 211 is opposite to the through hole 221. By providing the protrusion 211, the ultrasonic atomizing plate 20 can improve the structural strength of the ultrasonic atomizing plate 20 and improve the atomization efficiency.

[0070] Here, by controlling the high-frequency vibration of the metal microporous sheet 21, the aerosol generation matrix passes through the micropores 23 to form micron-sized aerosols, thereby generating aerosols. Vibration atomization has the advantages of low noise, low energy consumption, low-temperature atomization without e-liquid decomposition, smokeless operation, and the ability to use water as a solvent, resulting in a better vaping experience, reduced harm, and smokeless operation.

[0071] For example, the metal microporous sheet 21 can be formed by stamping to form the protrusion 211, for example by stamping with a stamping machine.

[0072] Please see Figure 5 For example, the outer contour of the protrusion 211 is a spherical cap surface.

[0073] Here, a spherical crown refers to the curved surface remaining after a sphere is cut by a plane. That is, at least a portion of the sidewall of the protrusion 211 is a curved surface.

[0074] Understandably, by setting the outer contour of the protrusion 211 to a spherical cap surface, the sidewall of the protrusion 211 is curved. Thus, by providing micropores 23 on the sidewall of the protrusion 211, it is beneficial that the sidewall of the protrusion 211 can also atomize the aerosol generating matrix through vibration. In other words, the protrusion 211 can atomize the aerosol generating matrix through vibration in both the axial and radial directions, further improving the atomization efficiency.

[0075] Here, by achieving smokeless operation of the aerosol generator 1000, the aerosol forms carbon dioxide and water in the air, which is environmentally friendly and more suitable for lung inhalation, and the aerosol is produced at room temperature.

[0076] Here, the ultrasonic atomizing plate 20 is set parallel or approximately parallel to the height direction of the atomizer, that is, the center line of the ultrasonic atomizing plate 20 is set perpendicular or approximately perpendicular to the height direction of the atomizer.

[0077] Of course, in other embodiments, the ultrasonic atomizing plate 20 is set perpendicular to or approximately perpendicular to the height direction of the atomizer, that is, the center line of the ultrasonic atomizing plate 20 is set parallel to or approximately parallel to the height direction of the atomizer.

[0078] like Figures 3 to 6 As shown, micropores 23 are formed on the ultrasonic atomizing plate 20. The ultrasonic atomizing plate 20 can convert electrical energy into vibration energy and atomize the aerosol generating matrix into aerosol during the vibration process. At the same time, the ultrasonic atomizing plate 20 vibrates to generate ultrasonic waves, which atomize the aerosol generating matrix, thereby generating aerosol for users.

[0079] An ultrasonic atomizing plate 20 is provided between the liquid outlet of the liquid inlet channel 12 and the atomizing chamber 11 to act as a seal. The ultrasonic atomizing plate 20 can effectively seal the liquid outlet of the liquid inlet channel 12. When the atomizer is not in operation, the aerosol generating matrix in the liquid storage chamber 40 will not be exposed in the atomizing chamber 11, thereby reducing the evaporation of the aroma of the aerosol generating matrix and reducing the possibility of leakage. At the same time, micropores 23 are provided in some positions of the ultrasonic atomizing plate 20. When the atomizer is in operation, the ultrasonic atomizing plate 20 will vibrate, and the aerosol generating matrix in the liquid inlet channel 12 can be atomized into aerosol by the ultrasonic atomizing plate 20 during the vibration. Thus, by placing an ultrasonic atomizing plate 20 between the liquid outlet of the liquid inlet channel 12 and the atomizing chamber 11, which can play a sealing role, it can not only not affect the atomization of the aerosol generating matrix, but also effectively reduce the volatilization of the aroma of the aerosol generating matrix, and at the same time, reduce the possibility of leakage in the liquid storage chamber 40.

[0080] On the one hand, the equivalent pore size of the mist outlet is directly related to the particle size of the atomized aerosol. Since the particle size of the aerosol formed after atomization usually needs to be less than 2.5μm to provide users with a better inhalation experience, the equivalent pore size of the mist outlet cannot be too large. On the other hand, sufficient vapor volume is required to provide users with a sufficiently good inhalation experience, typically greater than 10mg / puff. In related technologies, the equivalent pore size of the mist outlet is reduced to meet the required aerosol particle size. However, reducing the equivalent pore size of the mist outlet also reduces the mist outlet area, resulting in a decrease in the amount of aerosol produced, which affects the user's inhalation experience. Therefore, there is an urgent need for an aerosol generating device 1000 that combines a small equivalent pore size and a large atomization volume.

[0081] For example, the equivalent aperture of the mist outlet is smaller than that of the liquid inlet, which allows the particle size of the generated aerosol to meet the requirements while increasing the liquid supply rate.

[0082] For example, a precision etching process can be used to form micro-holes 23 on the protrusions 211 to improve the processing precision of the micro-holes 23.

[0083] The number of micropores 23 segments can be two or more.

[0084] Along the direction from the side away from the piezoelectric ceramic 22 to the side facing the piezoelectric ceramic 22, the equivalent pore size of the micropore 23 segment decreases. In other words, along the direction from the liquid suction port 233 to the mist outlet 234, the equivalent pore size of the micropore 23 segment decreases.

[0085] It should be noted that the reduction in the equivalent pore size of the micropore 23 segment along the direction from the liquid inlet 233 to the mist outlet 234 means that the equivalent pore size of different micropore 23 segments decreases along the direction from the liquid inlet 233 to the mist outlet 234. In other words, the equivalent pore size of the upstream micropore 23 segment is greater than that of the downstream micropore 23 segment.

[0086] For example, along the direction from the liquid inlet 233 to the mist outlet 234, the equivalent pore size of a single micropore segment 23 is reduced or remains unchanged.

[0087] For example, the stepped surface faces the side of the metal microporous sheet 21 away from the piezoelectric ceramic 22.

[0088] A stepped surface is formed between two adjacent micropore segments 23. In other words, the equivalent pore diameter of the micropore 23 is not constant or gradually changing. When the equivalent pore diameters of the liquid suction port 233 and the mist outlet 234 are constant, compared with micropores 23 that do not have a stepped surface formed inside, or compared with micropores 23 whose equivalent pore diameter gradually decreases, the formation of a stepped surface between two adjacent micropore segments 23 is beneficial to increasing the volume of the micropore 23, thereby improving the liquid storage capacity of the micropore 23 and the deformation capability of the metal microporous sheet 21.

[0089] The ultrasonic atomizing plate 20 in this embodiment includes a piezoelectric ceramic 22 and a metal microporous plate 21. The metal microporous plate 21 has a protrusion 211, which on the one hand improves the structural strength of the metal microporous plate 21 and reduces the risk of damage during vibration; on the other hand, the protrusion direction of the protrusion 211 is opposite to the through hole 221, meaning that the ultrasonic atomizing plate 20 can contact the liquid guiding element of the atomizer through the protrusion 211. This allows the liquid guiding element to supply liquid to the protrusion 211 while also reducing the contact area between the ultrasonic atomizing plate 20 and the liquid guiding element, thus reducing the stress and vibration mechanical energy loss of the ultrasonic atomizing plate 20 and improving atomization efficiency. Furthermore, given a fixed equivalent aperture for the mist outlet 234 and the liquid suction port 233... By configuring the micropores 23 to include at least two micropore segments 23, with a stepped surface formed between adjacent micropore segments 23, the volume of the micropores 23 is increased compared to micropores 23 without a stepped surface. Therefore, during the vibration of the ultrasonic atomizing plate 20, the ultrasonic atomizing plate 20 deforms significantly, which can squeeze the aerosol generating matrix inside the micropores 23 to the mist outlet 234 for atomization, thus increasing the atomization amount. At the same time, since more aerosol generating matrix can be stored inside the micropores 23, it is beneficial to further increase the atomization amount. In other words, it is not necessary to increase the equivalent aperture of the mist outlet 234 to increase the atomization amount. It can have both a small equivalent aperture and a large atomization amount. In other words, it can take into account both the particle size of the aerosol and the atomization amount, thus improving the user experience.

[0090] In some embodiments, please refer to Figure 6 At least two micropore segments 23 include a first micropore segment 231 and a second micropore segment 232, with a first stepped surface 236 formed between the first micropore segment 231 and the second micropore segment 232. One end of the first micropore segment 231 extends to the first stepped surface 236, and the end away from the first stepped surface 236 forms a liquid suction port 233. One end of the second micropore segment 232 extends to the first stepped surface 236 and forms a connecting port 235, and the end away from the first stepped surface 236 forms a mist outlet 234.

[0091] In other words, there are two micropore segments 23, namely the first micropore segment 231 and the second micropore segment 23.

[0092] Along the direction from the liquid suction port 233 to the mist outlet 234, the first micropore section 231 is located upstream of the second micropore section 23.

[0093] Here, along the direction from the liquid suction port 233 to the mist outlet 234, the equivalent pore size of the first micropore section 231 can remain unchanged or gradually decrease.

[0094] Here, along the direction from the liquid suction port 233 to the mist outlet 234, the equivalent pore size of the second micropore section 232 can remain unchanged or gradually decrease.

[0095] By setting the micropores 23 to include a first micropore segment 231 and a second micropore segment 23, the particle size and atomization amount of aerosol can be taken into account, which improves the user experience while reducing the manufacturing difficulty of the metal microporous sheet 21.

[0096] In some embodiments, the metal microporous sheet 21 includes at least one of stainless steel sheet, titanium alloy sheet, copper alloy sheet, palladium-nickel alloy sheet, or gold-plated sheet.

[0097] In other words, the material of the metal microporous sheet 21 may include at least one of stainless steel, titanium alloy, copper alloy, palladium-nickel alloy or gold plating.

[0098] Here, the metal microporous sheet 21 is made of stainless steel, titanium alloy, copper alloy, palladium-nickel alloy, or gold-plated parts. Stainless steel, titanium alloy, copper alloy, palladium-nickel alloy, or gold-plated parts have high hardness, so the metal microporous sheet 21 can maintain its shape well and is not easily deformed even during vibration.

[0099] Of course, in some other embodiments, the metal microporous sheet 21 may also be made of any other suitable material.

[0100] The working principle of the atomizing core is mainly based on the piezoelectric ceramic transducer 22 converting electrical energy into high-frequency vibrational mechanical energy, which drives the metal microporous sheet 21 to vibrate at high frequency. The aerosol generation matrix passes through the micropores 23 to form micron-sized aerosols, thereby generating aerosols. Vibration atomization has the advantages of low noise, low energy consumption, low-temperature atomization without e-liquid decomposition, smokeless operation, and the ability to use water as a solvent, resulting in a better vaping experience, reduced harm, and smokeless operation.

[0101] It should be noted that there are no restrictions on the material of the piezoelectric ceramic 22.

[0102] In some embodiments, the piezoelectric ceramic 22 is made of at least one of lead zirconate titanate, sodium potassium niobate, or barium calcium zirconate titanate.

[0103] In other words, high-performance lead zirconate titanate (PZT), potassium sodium niobate (KNN), or barium calcium zirconate titanate (BCZT) based piezoelectric ceramics 22 can be used, which is beneficial to improving the atomization effect of the ultrasonic atomizing plate 20.

[0104] It should be noted that the specific shape of the ultrasonic atomizing plate 20 is not limited here.

[0105] For example, the ultrasonic atomizing plate 20 is generally circular. The edges of the circular ultrasonic atomizing plate 20 are smooth and there are no protruding sharp corners, which can reduce stress concentration and prevent damage to the ultrasonic atomizing plate 20. Of course, in some other embodiments, the ultrasonic atomizing plate 20 may also be in any other suitable shape.

[0106] For example, the ultrasonic atomizing plate 20 is of moderate size, which can ensure atomization efficiency and avoid the situation where the ultrasonic atomizing plate 20 is too large, making it difficult to assemble into the atomizer.

[0107] In some embodiments, please refer to Figure 5 The metal microporous sheet 21 has a thickness dimension of H in the thickness direction, and H is in the range of 0.01 mm to 1.0 mm.

[0108] Here, the dimension of the metal microporous sheet 21 in the thickness direction is the wall thickness of the metal microporous sheet 21, that is, the dimension of the flat plate portion 213 of the metal microporous sheet 21 in the thickness direction of the ultrasonic atomizing sheet 20, and does not refer to the dimension of the protrusion portion 211 in the thickness direction of the ultrasonic atomizing sheet 20.

[0109] Here, the dimension of the metal microporous sheet 21 in the thickness direction of the ultrasonic atomizing sheet 20 can be any one of 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm or any combination thereof.

[0110] The larger the size of the metal microporous sheet 21 in the thickness direction of the ultrasonic atomizing sheet 20, the greater the structural strength of the metal microporous sheet 21. The smaller the size of the metal microporous sheet 21 in the thickness direction of the ultrasonic atomizing sheet 20, the more beneficial it is to improve the vibration frequency of the metal microporous sheet 21.

[0111] In this embodiment, by setting the size of the metal microporous sheet 21 in the thickness direction of the ultrasonic atomizing sheet 20 to 0.01mm-0.1mm, the size within this range is moderate. This not only ensures that the metal microporous sheet 21 has sufficient structural strength, but also helps to improve the toughness of the metal microporous sheet 21, thereby increasing the vibration frequency of the metal microporous sheet 21.

[0112] In some embodiments, please refer to Figures 5 to 6 The depth of the first micropore segment 231 is H1, wherein the ratio of H1 to H is in the range of 0.5 to 0.8.

[0113] The metal microporous sheet 21 has a dimension of H in the thickness direction, which means that the depth of the micropore 23 is H.

[0114] In other words, the ratio of the depth of the second micropore segment 232 to the depth of the micropore 23 is in the range of 0.2 to 0.5.

[0115] The depth of the first micropore segment 231 is the distance between the liquid suction port 233 and the first step surface 236.

[0116] The ratio of H1 to H can be any one of the following point values: 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, or any point value between the two.

[0117] It is understandable that, given a constant H, the larger the ratio of H1 to H, the greater the depth of the first micropore segment 231, which in turn increases the liquid storage capacity of the micropore 23, thereby increasing the atomization rate.

[0118] In this embodiment, by setting the ratio of H1 to H to be in the range of 0.5 to 0.8, the liquid storage capacity of the micropore 23 can be increased, thereby increasing the atomization amount. It can also improve the problem that the cone angle of the second micropore segment 232 is too small due to the excessive depth of the second micropore segment 232, which is not conducive to aerosol discharge.

[0119] The equivalent aperture of the suction port 233 is D1, and the equivalent diameter of the first stepped surface 236 is D2, wherein the ratio of D2 to D1 is in the range of 0.7 to 1.

[0120] In some embodiments, please refer to Figure 6 The equivalent pore size of the suction port 233 is D1, which is in the range of 20μm to 150μm.

[0121] The equivalent pore size of the suction port 233 can be any one of the following values ​​or any value between two: 20μm, 21μm, 22μm, 23μm, 25μm, 26μm, 27μm, 28μm, 29μm, 30μm, 32μm, 33μm, 35μm, 36μm, 38μm, 39μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, and 150μm.

[0122] The liquid suction port 233 is located on the side of the metal microporous sheet 21 away from the piezoelectric ceramic 22, that is, the liquid suction port 233 is located on the liquid suction surface of the metal microporous sheet 21.

[0123] In this embodiment, by setting the pore size of the suction port 233 to the range of 20μm to 150μm, the aerosol generating matrix can be improved to enter the micropore 23 through the suction port 233 to atomize the aerosol generating matrix. This improves the atomization efficiency and atomization amount. At the same time, it also helps the ultrasonic atomizing plate 20 to act as a seal when the atomizer is not working. In this way, the atomization of the aerosol generating matrix is ​​not affected, the volatilization of the aroma of the aerosol generating matrix is ​​reduced, and the possibility of leakage in the liquid storage chamber 40 is reduced.

[0124] In some embodiments, please refer to Figure 6 The equivalent diameter of the first step surface 236 is D2, where the ratio of D2 to D1 is in the range of 0.7 to 1.

[0125] When the ratio of D2 to D1 is equal to 1, the equivalent pore size of the first micropore segment 231 remains unchanged.

[0126] In this embodiment, by setting the ratio of D2 to D1 to be in the range of 0.7 to 1, the cone angle of the first microporous segment 231 can be made appropriate, which is conducive to the flow of the aerosol generation matrix to the mist outlet 234 and to increase the liquid storage capacity.

[0127] In some embodiments, please refer to Figure 6 The equivalent aperture of the mist outlet 234 is D3, which is in the range of 1.1 μm to 2.0 μm.

[0128] The equivalent aperture of the mist outlet 234 can be any one of 1.1μm, 1.2μm, 1.3μm, 1.4μm, 1.5μm, 1.6μm, 1.7μm, 1.8μm, 1.9μm, and 2μm, or any value between two of them.

[0129] It should be noted that large aerosol particles can affect the user's taste experience. Therefore, the equivalent pore size of the micropore 23 needs to be appropriate so that the particle size of the aerosol formed after vibration and atomization by the ultrasonic atomizing plate 20 is appropriate.

[0130] The mist outlet 234 is located on the side of the metal microporous sheet 21 facing the piezoelectric ceramic 22, that is, the liquid suction port 233 is located on the liquid suction surface of the metal microporous sheet 21.

[0131] In this embodiment, by setting the aperture of the mist outlet 234 of the micropore 23 to between 1.1 μm and 2.0 μm, the aperture of the mist outlet 234 within this range is moderate, so that the aerosol particles formed after the ultrasonic atomizing plate 20 vibrates and atomizes through the aperture of the micropore 23 within this range are moderate. This not only has good atomization efficiency and atomization amount, but also ensures that the particle size of the aerosol is appropriate, and also reduces the volatilization of the aroma of the aerosol generation matrix and reduces the possibility of leakage.

[0132] In some embodiments, please refer to Figure 6 The equivalent aperture of the connecting port 235 is D4, wherein the ratio of D3 to D4 is in the range of 0.04 to 1.

[0133] When the ratio of D3 to D4 is equal to 1, the equivalent pore size of the second micropore segment 232 remains unchanged.

[0134] In this embodiment, by setting the ratio of D3 to D4 to be in the range of 0.04 to 1, the cone angle of the second microporous segment 232 can be made appropriate, which is conducive to the discharge of aerosols and also facilitates the flow of the aerosol generation matrix in the first microporous segment 231 to the second microporous segment 232 through the connecting port 235.

[0135] In some embodiments, please refer to Figure 5 The height of the protrusion 211 in the thickness direction of the metal microporous sheet 21 is H2, where H2 is greater than 0 and less than or equal to 2 mm.

[0136] The dimension of the protrusion 211 in the thickness direction of the metal microporous sheet 21 can be any one of 0.01mm, 0.05mm, 0.1mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.48mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.78mm, 0.8mm, 0.85mm, 0.88mm, 0.9mm, 0.95mm, 0.97mm, 1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm, or 2mm, or a value between any two.

[0137] In this embodiment, by setting the size of the protrusion 211 in the thickness direction of the metal microporous sheet 21 to be less than or equal to 2 mm, the size of the protrusion 211 within this range is moderate, which not only has good atomization efficiency, but also improves the structural strength of the protrusion 211, thereby improving the reliability of the protrusion 211.

[0138] In some embodiments, please refer to Figure 6 The equivalent diameter of the first step surface 236 is D2, and the equivalent aperture of the connecting port 235 is D4, wherein the ratio of D4 to D2 is in the range of 0.2 to 0.5.

[0139] In this embodiment, by setting the ratio of D4 to D2 to be in the range of 0.2 to 0.5, it is beneficial for the aerosol generation matrix in the first microporous section 231 to flow to the second microporous section 232 through the connecting port 235, while also improving the liquid storage capacity of the micropores 23 for the aerosol generation matrix.

[0140] In some embodiments, please refer to Figure 5 On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 20, the equivalent diameter of the orthographic projection of the metal microporous sheet 21 is D5, which is in the range of 7mm to 50mm.

[0141] Here, on the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 20, the equivalent diameter of the orthographic projection of the metal microporous sheet 21 can be any one of 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 20mm, 22mm, 25mm, 30mm, 31mm, 32mm, 35mm, 38mm, 40mm, 41mm, 42mm, 45mm, 48mm, 50mm, or any value between two of them.

[0142] In this embodiment, on the projection surface perpendicular to the thickness direction of the ultrasonic atomizing plate 20, the equivalent diameter of the projection of the metal microporous plate 21 is set to 7mm-50mm. The equivalent diameter within this range is appropriate, which not only enables the atomizer to have a certain atomization efficiency and atomization amount, but also helps to improve the structural compactness of the atomizer.

[0143] In some embodiments, please refer to Figure 5 The protrusion 211 has a spherical crown-like outline and includes a micropore region 212 with micropores 23 formed therein. On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 20, the equivalent diameter of the projection of the micropore region 212 is D6, which is in the range of 2mm to 30mm.

[0144] For example, the protrusion 211 also includes a non-porous region without micropores 23.

[0145] The equivalent diameter of the projected micropore region 212 can be any one of the following values: 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 20mm, 22mm, 25mm, 30mm, or any value between two of these values.

[0146] In this embodiment, by setting the equivalent diameter of the projection of the microporous region 212 to the range of 2mm to 30mm, it is beneficial to ensure that the metal microporous sheet 21 has sufficient structural strength and to improve atomization efficiency and atomization amount.

[0147] In some embodiments, the spacing between adjacent micropores 23 is L1, and L1 is in the range of 20 μm to 300 μm.

[0148] The spacing between adjacent micropores 23 refers to the distance between the center lines of adjacent micropores 23.

[0149] The spacing between adjacent suction ports 233 can be any one of the following values ​​or any combination of two values: 20μm, 25μm, 30μm, 32μm, 33μm, 35μm, 36μm, 37μm, 38μm, 39μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 68μm, 70μm, 75μm, 80μm, 85μm, 88μm, 90μm, 95μm, 100μm, 120μm, 150μm, 180μm, 200μm, 220μm, 250μm, 280μm, and 300μm.

[0150] In this embodiment, by setting the spacing between adjacent suction ports 233 to the range of 20μm to 300μm, the aerosol generating matrix can be improved to enter the micropores 23 through the suction ports 233 to atomize the aerosol generating matrix. This improves the atomization efficiency and atomization amount, while also giving the ultrasonic atomizing sheet 20 a certain structural strength.

[0151] In some embodiments, the number of micropores 23 is in the range of 100 to 3000.

[0152] The number of micropores 23 can be any one of 100, 200, 500, 600, 800, 1000, 1100, 1200, 1500, 1800, 2000, 2200, 2500, 2600, 2800, or 3000, or any combination thereof.

[0153] In this embodiment, by setting the number of micropores 23 to be in the range of 100 to 3000, the aerosol generating matrix can be improved by entering the micropores 23 through the suction port 233 to atomize the aerosol generating matrix. This improves atomization efficiency and atomization amount while also giving the ultrasonic atomizing sheet 20 a certain structural strength. In other words, micropores 23 in this density range can have both a large atomization amount and good fatigue resistance and structural strength, thus balancing atomization amount with the fatigue resistance and structural strength of the metal microporous sheet 21.

[0154] For example, the micropores 23 may be uniformly distributed in the micropore region 212 or non-uniformly distributed in the micropore region 212.

[0155] For example, the protrusion 211 is symmetrical.

[0156] The ultrasonic atomizing sheet 20 of this application embodiment constructs a large-capacity instantaneous liquid storage micropore 23 in the protrusion 211, and controls the taper of the second micropore section 232, so that it can quickly produce mist and quickly replenish liquid when the metal micropore sheet 21 is ultrasonically vibrated. The ultrasonic atomizing sheet 20 has the characteristics of large atomization volume, controllable particle size and high atomization efficiency, and has great potential for market application.

[0157] In some embodiments, the inner diameter of the bottom of the spherical cap of the protrusion 211 is in the range of 3 mm to 8 mm. The inner diameter of the bottom of the spherical cap of the protrusion 211, or in other words, the equivalent diameter of the projection of the protrusion 211 on a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 20, is in the range of 3 mm to 8 mm.

[0158] The inner diameter of the bottom of the spherical surface of the protrusion 211 can be any one of 3mm, 3.3mm, 3.5mm, 4mm, 4.2mm, 4.5mm, 5mm, 5.5mm, 5.8mm, 6mm, 6.5mm, 6.8mm, 7mm, 7.3mm, 7.5mm, and 8mm, or any value between two of them.

[0159] In this embodiment, by setting the inner diameter of the bottom of the spherical cap surface of the protrusion 211 to a range of 3mm to 8mm, the inner diameter within this range is moderate, which not only has good atomization efficiency and atomization amount, but also improves the structural compactness of the atomizer.

[0160] In some embodiments, the piezoelectric ceramic 22 has a dimension in the thickness direction of the ultrasonic atomizing sheet 20 ranging from 0.4 mm to 0.8 mm.

[0161] The dimension of the piezoelectric ceramic 22 in the thickness direction of the ultrasonic atomizing sheet 20 can be any one of 0.4mm, 0.43mm, 0.45mm, 0.5mm, 0.52mm, 0.55mm, 0.6mm, 0.65mm, 0.68mm, 0.7mm, 0.73mm, 0.75mm, 0.8mm, or any value between two of them.

[0162] In some embodiments, the central axis of the protrusion 211 is parallel to the central axis of the air outlet channel 31.

[0163] For example, the central axis of the protrusion 211 coincides with the central axis of the air outlet channel 31. Considering assembly tolerances and manufacturing errors of components, the coincidence here can be complete or approximately coincident.

[0164] In this embodiment, by setting the central axis of the protrusion 211 to be parallel to the central axis of the air outlet channel 31, the protrusion 211 can be directly facing the air outlet channel 31. In this way, the aerosol generated by the atomization of the aerosol by the protrusion 211 can directly enter the air outlet channel 31, which improves the situation where the aerosol contacts the side wall of the air outlet channel 31 to form condensate, which helps to reduce the generation of condensate and thus improve the atomization efficiency.

[0165] In some embodiments, please refer to Figures 3 to 4 On the projection plane perpendicular to the height direction of the atomizer, the projection of the protrusion 211 is located within the projection range of the air outlet channel 31.

[0166] In other words, in a cross-section perpendicular to the height direction of the atomizer, the cross-sectional dimension of the protrusion 211 is smaller than the cross-sectional dimension of the air outlet channel 31.

[0167] In this embodiment, by placing the projection of the protrusion 211 within the projection range of the air outlet channel 31, the aerosol generated by the atomized aerosol from the protrusion 211 can directly enter the air outlet channel 31. This improves the situation where the aerosol contacts the side wall of the air outlet channel 31 or the cavity wall of the atomization chamber 11 to form condensate, further reducing the generation of condensate and further improving the atomization efficiency.

[0168] In some embodiments, the central axes of the micropores 23, the metal microporous sheet 21, and the piezoelectric ceramic 22 are parallel.

[0169] For example, the central axes of the micropore 23, the metal micropore sheet 21, and the piezoelectric ceramic 22 are parallel. Considering assembly tolerances and manufacturing errors of the parts, the parallelism described here can be completely parallel or approximately parallel.

[0170] In this embodiment, by setting the central axes of the micropores 23, the metal microporous sheet 21, and the piezoelectric ceramic 22 to be parallel, the micropores 23 of the protrusion 211 can be aligned with the air outlet channel 31. In this way, the aerosol generated by the atomized aerosol from the protrusion 211 can directly enter the air outlet channel 31, improving the situation where the aerosol contacts the sidewall of the air outlet channel 31 to form condensate, which helps to reduce the generation of condensate and thus improve atomization efficiency.

[0171] In some embodiments, the dynamic viscosity of the aerosol generating matrix at room temperature ranges from 1 cp to 4 cp.

[0172] The dynamic viscosity range of the aerosol generating matrix can be any point value among 1cp, 1.2cp, 1.5cp, 1.8cp, 2cp, 2.2cp, 2.5cp, 2.8cp, 3cp, 3.5cp, 3.8cp, and 4cp, or any point value between two of them.

[0173] In some embodiments, the ultrasonic atomizing plate 20 operates at a frequency of 120kHz-160kHz.

[0174] The operating frequency of the ultrasonic atomizing plate 20 can be any one of 120kHz, 125kHz, 130kHz, 135kHz, 140kHz, 145kHz, 150kHz, 155kHz, and 160kHz, or any value between two of them.

[0175] In this embodiment, by setting the operating frequency of the ultrasonic atomizing plate 20 to 120kHz-160kHz, the atomizer can have a certain atomization efficiency and atomization amount, and the ultrasonic atomizing plate 20 can also have a certain service life at this operating frequency.

[0176] In some embodiments, the resonant impedance of the ultrasonic atomizing plate 20 is less than 100Ω.

[0177] In some embodiments, the driving voltage of the ultrasonic atomizing plate 20 is 60Vpp-100Vpp.

[0178] The driving voltage of the ultrasonic atomizing plate 20 can be any one of 60Vpp, 65Vpp, 70Vpp, 75Vpp, 80Vpp, 85Vpp, 90Vpp, 95Vpp, and 100Vpp, or any value between two of them.

[0179] Here, by setting the operating frequency of the ultrasonic atomizing plate 20 to 120kHz-160kHz, setting the resonant impedance of the ultrasonic atomizing plate 20 to less than 100Ω, and setting the driving voltage of the ultrasonic atomizing plate 20 to 60Vpp-100Vpp, the atomizer can have better atomization efficiency and atomization volume.

[0180] To address the issue of low atomization volume (less than 8 mg / 3 s) in related technologies, this application provides an ultrasonic atomizing plate 20, an atomizer, and an aerosol generating device 1000. This ultrasonic atomizing plate 20, atomizer, and aerosol generating device 1000 employs a high-performance ultrasonic atomizing plate 20, and designs the protrusions 211 and micropores 23 of the ultrasonic atomizing plate 20, resulting in a large atomization volume. It is suitable for water-based ultrasonic aerosol generating device 1000 products. The performance of the ultrasonic atomizing plate 20 is analyzed below based on experimental data from several embodiments.

[0181] The following tests were conducted on Examples 1, 2, 3, Comparative Example 1, and Comparative Example 2.

[0182] Atomization amount test method: The microporous ultrasonic atomizing cores of Examples 1, 2, 3, Comparative Example 1, and Comparative Example 2 were connected to the same circuit and atomized water-based aerosols of the same composition to generate a matrix. The atomization amount was recorded and calculated.

[0183] Testing equipment: platform, filter, filter clip, electronic balance, four-channel smoke exhaust system

[0184] Test power: 2.5W

[0185] Test frequency: 145kHz (scanning mode)

[0186] Test duration: 3 seconds on, 27 seconds off

[0187] Test aerosol generation matrix: water-based e-liquid (dynamic viscosity ~6CP)

[0188] Test temperature: 25℃

[0189] Test humidity: 60%

[0190]

[0191]

[0192] Compared with Example 1, Example 2 increases the depth of the first microporous segment 231, increases the instantaneous liquid storage capacity of the first microporous segment 231, and correspondingly increases the atomization amount.

[0193] In Example 3, the diameter of the liquid inlet (connecting port 235) of the second microporous section 232 is reduced, and the fluid resistance of the liquid inlet is increased. Therefore, the atomization amount is slightly lower, but still above 10 mg / puff.

[0194] The size of the mist outlet of the first microporous segment 231 corresponding to Comparative Example 1 is slightly smaller, the liquid storage capacity is reduced, and the atomization capacity is slightly reduced.

[0195] The first micropore segment 231 in Comparative Example 2 has a shallow depth. On the one hand, the instantaneous liquid storage capacity of the first micropore segment 231 is low. On the other hand, the depth of the second micropore segment 232 is large and the cone angle is too small, which is not conducive to atomization and discharge, so the atomization amount is low.

[0196] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0197] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. An ultrasonic atomizing sheet, used in an aerosol generating device, characterized in that, include: A piezoelectric ceramic, wherein the central region of the piezoelectric ceramic has a clearance through hole; A metal microporous sheet includes a flat plate portion and a protruding portion; the flat plate portion is attached to the piezoelectric ceramic, the protruding portion corresponds to the clearance through hole, the protruding direction of the protruding portion is opposite to the clearance through hole, the protruding portion is provided with a plurality of through micropores, the micropores include a liquid suction port on the side away from the piezoelectric ceramic and a mist outlet on the side facing the piezoelectric ceramic, the metal microporous sheet atomizes the aerosol generation matrix into aerosol during vibration; The micropores include at least two micropore segments that are connected in sequence. The equivalent pore diameter of each micropore segment decreases along the direction from the side away from the piezoelectric ceramic to the side facing the piezoelectric ceramic, and a step surface is formed between two adjacent micropore segments.

2. The ultrasonic atomizing sheet according to claim 1, characterized in that, The at least two microporous segments include a first microporous segment and a second microporous segment, a first step surface is formed between the first microporous segment and the second microporous segment, one end of the first microporous segment extends to the first step surface, and the end away from the first step surface forms the liquid suction port, one end of the second microporous segment extends to the first step surface and forms a communication port, and the end away from the first step surface forms the mist outlet.

3. The ultrasonic atomizing sheet according to claim 2, characterized in that, The metal microporous sheet has a thickness dimension H, and the depth of the first microporous segment is H1, wherein the ratio of H1 to H is in the range of 0.5 to 0.8; and / or, The equivalent aperture of the suction port is D1, and the equivalent diameter of the first stepped surface is D2, wherein the ratio of D2 to D1 is in the range of 0.7 to 1.

4. The ultrasonic atomizing sheet according to claim 2, characterized in that, The equivalent pore size of the suction port is D1, which is in the range of 20 μm to 150 μm; and / or, The equivalent aperture of the mist outlet is D3, which is in the range of 1.1 μm to 2.0 μm.

5. The ultrasonic atomizing sheet according to claim 2, characterized in that, The equivalent aperture of the mist outlet is D3, and the equivalent aperture of the connecting port is D4, wherein the ratio of D3 to D4 is in the range of 0.04 to 1; and / or, The height of the protrusion in the thickness direction of the metal microporous sheet is H2, where H2 is greater than 0 and less than or equal to 2 mm.

6. The ultrasonic atomizing sheet according to claim 2, characterized in that, The equivalent diameter of the first step surface is D2, and the equivalent aperture of the connecting port is D4, wherein the ratio of D4 to D2 is in the range of 0.2 to 0.

5.

7. The ultrasonic atomizing sheet according to any one of claims 1 to 6, characterized in that, The metal microporous sheet has a thickness dimension H, which is in the range of 0.01 mm to 1.0 mm; and / or, On a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the orthographic projection of the metal microporous sheet is D5, which is in the range of 7mm to 50mm.

8. The ultrasonic atomizing sheet according to any one of claims 1 to 6, characterized in that, The protrusion has a spherical crown-like outline and includes a micropore region with the micropores formed therein. On a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the projection of the micropore region is D6, which is in the range of 2mm to 30mm.

9. The ultrasonic atomizing sheet according to any one of claims 1 to 6, characterized in that, The spacing between adjacent micropores is L1, where L1 ranges from 20 μm to 300 μm; and / or, The number of micropores ranges from 100 to 3000.

10. An atomizer, characterized in that, Includes the ultrasonic atomizing sheet according to any one of claims 1-9.

11. An aerosol generating device, characterized in that, It includes a power supply assembly and an atomizer as described in any one of claims 10, wherein the power supply assembly is electrically connected to the atomizer.

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