Ultrasonic atomization piece, atomizer, and aerosol generating device

Abstract

Embodiments of the present disclosure provide an ultrasonic atomization piece, an atomizer, and an aerosol generating device. The ultrasonic atomization piece comprises piezoelectric ceramic and a metal microporous piece. A clearance through hole is formed at a middle area of the piezoelectric ceramic. The metal microporous piece comprises 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 outer contour of the protruding portion is a spherical cap surface and the protrusion direction faces away from the clearance through hole. A plurality of through micropores are formed at the protruding portion. During vibration, the metal microporous piece atomizes an aerosol generating substrate into an aerosol. The inner diameter at the bottom of the spherical cap surface of the protruding portion is D, and the size of the protruding portion in the thickness direction of the metal microporous piece is H, wherein 0.05≤H / D≤0.15. According to the ultrasonic atomization piece provided by the embodiments of the present disclosure, by providing the protruding portion having a spherical cap-shaped outer contour, and setting the ratio of the size of the protruding portion in the thickness direction of the metal microporous piece to the inner diameter at the bottom of the spherical cap surface of the protruding portion to 0.05-0.15, the atomization amount is increased, thereby improving the use experience.

Description

Ultrasonic atomizing plate, atomizer and aerosol generating device

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to patent application No. 202411570260.2, filed on November 5, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of atomization technology, and in particular to an ultrasonic atomizing plate, an atomizer, and an aerosol generating device. Background Technology

[0004] 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.

[0005] In related technologies, in embodiments where aerosol generation matrix is ​​atomized by ultrasonic atomization, electrical energy is converted into the mechanical energy of the ultrasonic atomizing plate. In the development of aerosol generation devices, how to improve the structural strength and atomization efficiency of the ultrasonic atomizing plate is an issue that cannot be ignored. Summary of the Invention

[0006] In view of this, the present disclosure aims to provide an ultrasonic atomizing sheet, an atomizer, and an aerosol generating device that can improve the structural strength and atomization efficiency of the ultrasonic atomizing sheet.

[0007] Therefore, a first aspect of the present disclosure provides an ultrasonic atomizing sheet, comprising:

[0008] Piezoelectric ceramics, with a clearance through-hole in the middle region;

[0009] 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 outer contour of the protruding portion is a spherical cap surface and the protruding direction is opposite to the clearance through hole, the protruding portion is provided with multiple through micropores, and the metal microporous sheet atomizes the aerosol generation matrix into aerosol during vibration.

[0010] Wherein, the inner diameter of the bottom of the spherical cap of the protrusion is D, and the height of the protrusion in the thickness direction of the metal microporous sheet is H, 0.05≤H / D≤0.15.

[0011] In some embodiments, the protrusion includes a micropore region having the micropores formed therein, and 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 D1, where 2mm≤D1≤4mm.

[0012] In some embodiments, the micropores include a liquid suction port on the side opposite to the piezoelectric ceramic;

[0013] The pore size of the suction port is D2, 20μm≤D2≤40μm; and / or,

[0014] The distance between adjacent suction ports is L1, where 30μm≤L1≤100μm.

[0015] In some embodiments, the micropore includes a mist outlet facing the piezoelectric ceramic side; the diameter of the mist outlet is D3, 1μm≤D3≤2μm.

[0016] In some embodiments, 3mm ≤ D ≤ 8mm; and / or, 0.2mm ≤ H ≤ 1mm.

[0017] In some embodiments, the metal microporous sheet has a thickness dimension H1, where 0.03 mm ≤ H1 ≤ 0.08 mm; and / or,

[0018] On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the projected metal microporous sheet is D4, where 13mm≤D4≤14mm.

[0019] In some embodiments, the metal microporous sheet includes at least one of a stainless steel sheet, a titanium alloy sheet, a palladium-nickel alloy sheet, or a gold-plated sheet.

[0020] In some embodiments, the diameter of the clearance through-hole is D5, 4mm≤D5≤6mm; and / or,

[0021] The outer diameter of the piezoelectric ceramic is D6, and 13mm≤D6≤14mm.

[0022] In some embodiments, the piezoelectric ceramic has a dimension H2 in the thickness direction of the ultrasonic atomizing sheet, where 0.4 mm ≤ H2 ≤ 0.8 mm; and / or,

[0023] The piezoelectric ceramic is made of at least one of lead zirconate titanate, sodium potassium niobate, or barium calcium zirconate titanate.

[0024] In some embodiments, the central axes of the micropores, the metal microporous sheet, and the piezoelectric ceramic are parallel; and / or,

[0025] The dynamic viscosity of the aerosol generating matrix at room temperature ranges from 1 cp to 4 cp.

[0026] A second aspect of this disclosure provides an atomizer including the ultrasonic atomizing plate described above.

[0027] In some embodiments, the ultrasonic atomizing plate operates at a frequency of 120kHz-160kHz; and / or,

[0028] The resonant impedance of the ultrasonic atomizing plate is less than 100Ω; and / or,

[0029] The driving voltage of the ultrasonic atomizing plate is 60Vpp-100Vpp.

[0030] In some embodiments, the atomizer includes:

[0031] A housing assembly having an air outlet channel formed therein, the air outlet channel extending along the height direction of the atomizer;

[0032] An atomizing base, at least a portion of which is disposed within the housing assembly; a liquid storage chamber is provided within the housing assembly for storing the aerosol generation matrix; the atomizing base has an atomizing cavity and a liquid inlet channel, the atomizing cavity being connected to the gas outlet channel, and the liquid inlet of the liquid inlet channel being connected to the liquid storage cavity;

[0033] The atomizing core includes a liquid guiding component and an ultrasonic atomizing plate. The outlet of the liquid inlet channel is in liquid communication with the liquid guiding component. The ultrasonic atomizing plate is located on the top side of the liquid guiding component and protrudes towards one side of the liquid guiding component to form the protrusion.

[0034] A third aspect of this disclosure provides an aerosol generating apparatus, including a power supply assembly and an atomizer as described in any embodiment of this disclosure, wherein the power supply assembly is electrically connected to the atomizer.

[0035] This embodiment of the ultrasonic atomizing sheet includes a piezoelectric ceramic and a metal microporous sheet. The metal microporous sheet has protrusions, which improve its structural strength and reduce the risk of damage during vibration. Furthermore, the protrusions face away from the through-holes, allowing the ultrasonic atomizing sheet to contact the liquid guide of the atomizer. This not only supplies liquid to the protrusions but also reduces the contact area between the ultrasonic atomizing sheet and the liquid guide, minimizing stress and vibration energy loss, and improving atomization efficiency. Additionally, by designing the protrusion's outline as a spherical cap, its sidewalls can also atomize the aerosol-generating matrix through vibration, further enhancing atomization efficiency. Moreover, by setting the ratio of the protrusion's thickness dimension to the inner diameter of the bottom of the spherical cap to 0.05-0.15, the atomization volume is increased, thereby improving the user experience. Attached Figure Description

[0036] Figure 1 is a schematic diagram of the structure of an aerosol generating device according to an embodiment of the present disclosure;

[0037] Figure 2 is a cross-sectional view of Figure 1;

[0038] Figure 3 is a cross-sectional view of the atomizer in the first embodiment of this disclosure;

[0039] Figure 4 is an enlarged view of point A in Figure 3;

[0040] Figure 5 is a cross-sectional view of the atomizer in the second embodiment of this disclosure;

[0041] Figure 6 is a schematic diagram of the structure of an ultrasonic atomizing sheet in one embodiment of the present disclosure;

[0042] Figure 7 is a schematic diagram of the structure of a metal microporous sheet in one embodiment of the present disclosure;

[0043] Figure 8 is a cross-sectional view of Figure 7.

[0044] Explanation of reference numerals in the attached drawings: 10, atomizing seat; 10a, atomizing chamber; 10b, liquid inlet channel; 11, atomizing top seat; 12, atomizing base; 20, atomizing core; 21, liquid guide; 22, ultrasonic atomizing plate; 22a, micropore; 221, piezoelectric ceramic; 2211, clearance through hole; 222, metal microporous plate; 2221, flat plate; 2222, protrusion; 2223, planar section; 2224, curved section; 30, shell assembly; 30a, air outlet channel; 100, atomizer; 100a, liquid storage chamber; 200, power supply assembly; 1000, aerosol generating device. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this disclosure and should not be regarded as undue limitations on this disclosure.

[0046] In the description of the embodiments of this disclosure, it should be noted that the terms "upper," "lower," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in Figure 2. These orientation terms are only for the convenience of describing the embodiments of this disclosure and simplifying the description, 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 the embodiments of this disclosure. The disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] As shown in Figures 1 and 2, this disclosure provides an aerosol generating device 1000, which includes an atomizer 100 and a power supply assembly 200 according to any embodiment of this disclosure.

[0048] 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 disclosure, 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.

[0049] The power supply assembly 200 is electrically connected to the atomizer 100. The power supply assembly 200 is mainly used to supply power to the atomizer 100 and to control the opening and closing of the entire aerosol generating device 1000.

[0050] Those skilled in the art will understand that the embodiments disclosed herein 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 any device that requires the use of a nebulizer 100.

[0051] As shown in Figures 2 to 8, this disclosure provides an atomizer 100, which includes an ultrasonic atomizing plate 22 according to any embodiment of this disclosure.

[0052] This disclosure provides an ultrasonic atomizing sheet 22. The ultrasonic atomizing sheet 22 includes a piezoelectric ceramic 221 and a metal microporous sheet 222. The piezoelectric ceramic 221 has a clearance through-hole 2211 in its middle region. The metal microporous sheet 222 includes a flat plate portion 2221 and a protrusion portion 2222. The flat plate portion 2221 is attached to the piezoelectric ceramic 221, and the protrusion portion 2222 corresponds to the clearance through-hole 2211. The protrusion portion 2222 has a spherical cap-like outline and its protruding direction is opposite to the clearance through-hole 2211. The protrusion portion 2222 has a plurality of through-holes 22a. During vibration, the metal microporous sheet 222 atomizes the aerosol generation matrix into an aerosol. The inner diameter of the bottom of the spherical cap-like surface of the protrusion portion 2222 is D, and the height of the protrusion portion 2222 in the thickness direction of the metal microporous sheet 222 is H, where 0.05 ≤ H / D ≤ 0.15.

[0053] For example, referring to Figures 2 to 5, the atomizer 100 includes a housing assembly 30, an atomizer base 10, and an atomizer core 20.

[0054] For example, an air outlet channel 30a is formed within the housing assembly 30, and the air outlet channel 30a extends along the height direction of the atomizer 100.

[0055] The air outlet passage 30a can be located in the middle region within the housing assembly 30, or it can be located on the side of the middle region of the housing assembly 30.

[0056] The aerosol formed by atomization can flow through the air outlet channel 30a and be discharged to the outside for user use through the air outlet.

[0057] For example, at least a portion of the atomizing base 10 is disposed within the housing assembly 30. The housing assembly 30 has a liquid storage chamber 100a for storing the aerosol generation matrix. The atomizing base 10 has an atomizing chamber 10a and a liquid inlet channel 10b. The atomizing chamber 10a communicates with the air outlet channel 30a, and the liquid inlet of the liquid inlet channel 10b communicates with the liquid storage chamber 100a.

[0058] For example, referring to Figures 4 to 6, the atomizing core 20 includes a liquid guiding element 21 and an ultrasonic atomizing plate 22, and the liquid outlet of the liquid inlet channel 10b is in liquid communication with the liquid guiding element 21. The ultrasonic atomizing plate 22 is located on the top side of the liquid guiding element 21 and protrudes towards the side of the liquid guiding element 21 to form a protrusion 2222.

[0059] The housing assembly 30 may have a liquid storage chamber 100a inside, which may be defined by the housing assembly 30 or by the housing assembly 30 and the atomizing seat 10.

[0060] The housing assembly 30 is the outer housing of the atomizer 100, and an air outlet channel 30a is formed inside it. At least a portion of the atomizer seat 10 is disposed within the housing assembly 30.

[0061] In this embodiment of the disclosure, the top of the atomizing seat 10 and the inner sidewall of the housing assembly 30 define a liquid storage chamber 100a for storing the aerosol generation matrix, and the liquid storage chamber 100a is arranged around the gas outlet channel 30a.

[0062] In other embodiments, a liquid storage cavity 100a may be formed inside the housing assembly 30.

[0063] 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.

[0064] For example, the atomizing seat 10 has an air intake channel that connects the outside world and the atomizing chamber 10a.

[0065] For example, referring to Figures 3 to 5, the atomizing base 10 has an atomizing chamber 10a and a liquid inlet channel 10b. The liquid inlet channel 10b connects the liquid storage chamber 100a and the atomizing chamber 10a, and the atomizing chamber 10a is connected to the air outlet channel 30a. The aerosol generating matrix in the liquid storage chamber 100a enters the atomizing core 20 through the liquid inlet channel 10b for atomization. The atomized aerosol flows through the air outlet channel 30a along with the air flowing in through the air inlet channel and is discharged to the outside through the air outlet for user use.

[0066] The atomizing core 20 is used to absorb the aerosol generating matrix and atomize the aerosol generating matrix to form an aerosol. The atomizing core 20 is disposed in the atomizing seat 10 and includes an ultrasonic atomizing plate 22, which is located between the atomizing chamber 10a and the liquid outlet of the liquid inlet channel 10b and blocks the liquid outlet of the liquid inlet channel 10b.

[0067] The piezoelectric ceramic 221 has a clearance through-hole 2211 in its middle region, which is used to avoid the liquid outlet. The micropores 22a of the ultrasonic atomizing plate 22 are provided on the protrusion 2222 and are located within the range of the clearance through-hole 2211. When the atomizer 100 is in operation, the piezoelectric ceramic 221 undergoes mechanical deformation with changes in voltage and frequency, thereby atomizing the aerosol generation matrix of the liquid inlet channel 10b into aerosol during vibration.

[0068] Please refer to Figures 6 to 8. The metal microporous sheet 222 includes a flat plate portion 2221 and a protrusion portion 2222. The flat plate portion 2221 is attached to the piezoelectric ceramic 221.

[0069] For example, the plate portion 2221 of the metal microporous sheet 222 can be bonded to the bottom side of the piezoelectric ceramic 221 using a conductive adhesive. Alternatively, the plate portion 2221 of the metal microporous sheet 222 can be bonded to the bottom side of the piezoelectric ceramic 221 using an epoxy resin adhesive.

[0070] Please refer to Figures 4 to 6. The protrusion 2222 has a spherical crown-like outline and protrudes in the opposite direction to the through hole 2211. That is, the ultrasonic atomizing plate 22 is located on the top side of the liquid guiding member 21 and protrudes towards the liquid guiding member 21 to form the protrusion 2222. In other words, the protrusion 2222 is closer to the liquid guiding member 21 than other areas of the ultrasonic atomizing plate 22. By providing the protrusion 2222, the ultrasonic atomizing plate 22 improves its structural strength and atomization efficiency.

[0071] Here, by controlling the high-frequency vibration of the metal microporous sheet 222, the aerosol generation matrix passes through the micropores 22a 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.

[0072] For example, the metal microporous sheet 222 can be formed by stamping, for example by stamping with a stamping machine. That is, the inner diameter of the spherical surface of the protrusion 2222 is the diameter of the stamping die.

[0073] 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.

[0074] Here, the ultrasonic atomizing plate 22 is set perpendicular to or approximately perpendicular to the height direction of the atomizer 100.

[0075] Of course, in other embodiments, the ultrasonic atomizing plate 22 is arranged parallel or substantially parallel to the height direction of the atomizer 100.

[0076] As shown in Figure 6, micropores 22a are formed on the ultrasonic atomizing plate 22. The ultrasonic atomizing plate 22 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 22 vibrates to generate ultrasonic waves, which atomize the aerosol generating matrix, thereby generating aerosol for users.

[0077] An ultrasonic atomizing plate 22 is provided between the liquid outlet of the liquid inlet channel 10b and the atomizing chamber 10a to act as a seal. The ultrasonic atomizing plate 22 can effectively seal the liquid outlet of the liquid inlet channel 10b. When the atomizer 100 is not in operation, the aerosol generating matrix in the liquid storage chamber 100a will not be exposed in the atomizing chamber 10a, thereby reducing the evaporation of the aroma of the aerosol generating matrix and reducing the possibility of leakage. At the same time, micropores 22a are provided at some positions of the ultrasonic atomizing plate 22. When the atomizer 100 is in operation, the ultrasonic atomizing plate 22 will vibrate, and the aerosol generating matrix in the liquid inlet channel 10b can be atomized into aerosol by the ultrasonic atomizing plate 22 during the vibration. Thus, by placing an ultrasonic atomizing plate 22 between the liquid outlet of the liquid inlet channel 10b and the atomizing chamber 10a, which can act as a seal, the atomization of the aerosol generation matrix can be maintained without affecting the atomization of the aerosol generation matrix, and the volatilization of the aroma of the aerosol generation matrix can be effectively reduced. At the same time, the possibility of leakage in the liquid storage chamber 100a can also be reduced.

[0078] For example, the nozzle of the housing assembly 30 has a flat cross-section, and the liquid inlet of the liquid inlet channel 10b is located in the width direction (short axis) of the atomizing seat 10, which is the width direction of the atomizing seat 10.

[0079] Here, the nozzle can restrict the user's suction direction. The sides of the user's mouth are aligned with the length direction (major axis) of the housing assembly 30. The major axis of the housing assembly 30 is the length direction of the atomizing seat 10. Thus, the liquid inlet is set in the width direction of the atomizing seat 10. When the aerosol generating matrix is ​​relatively small, all the aerosol generating matrix can enter through the liquid inlet of the atomizing seat 10, thereby improving the utilization rate of the aerosol generating matrix.

[0080] Of course, in other embodiments, the cross-section of the nozzle of the housing assembly 30 may also be circular.

[0081] For example, the outer contour of the protrusion 2222 is a spherical cap surface.

[0082] 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 2222 is a curved surface.

[0083] As can be understood, referring to Figures 7 and 8, by setting the outer contour of the protrusion 2222 to a spherical cap surface, the sidewall of the protrusion 2222 is curved. Thus, by providing micropores 22a on the sidewall of the protrusion 2222, it is beneficial that the sidewall of the protrusion 2222 can also atomize the aerosol generating matrix through vibration. That is to say, the protrusion 2222 can atomize the aerosol generating matrix through vibration in both the axial and radial directions, further improving the atomization efficiency.

[0084] Here, H / D can be any one of the following point values: 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, or any point value between two of them.

[0085] Here, on the projection plane perpendicular to the thickness direction of the ultrasonic atomizing plate 22, the inner diameter of the bottom of the spherical cap surface of the protrusion 2222 and the size of the protrusion 2222 in the thickness direction of the ultrasonic atomizing plate 22 are related to the atomization amount. That is, in this embodiment, for the protrusion 2222 with a spherical cap surface, setting the H / D range to 0.05-0.15 is beneficial to improve the atomization amount.

[0086] Here, the dimension H of the protrusion 2222 in the thickness direction of the ultrasonic atomizing sheet 22 and the inner diameter D of the bottom of the spherical cap surface of the protrusion 2222 are shown in Figure 8.

[0087] The ultrasonic atomizing sheet 22 of this embodiment includes a piezoelectric ceramic 221 and a metal microporous sheet 222. The metal microporous sheet 222 has a protrusion 2222, which on the one hand helps to improve the structural strength of the metal microporous sheet 222 and improves the situation of damage to the metal microporous sheet 222 during vibration; on the other hand, the protrusion direction of the protrusion 2222 is opposite to the through hole 2211, that is, the ultrasonic atomizing sheet 22 can contact the liquid guiding member 21 of the atomizer 100 through the protrusion 2222. While realizing the liquid guiding member 21 to supply liquid to the protrusion 2222, it also helps to reduce the contact area between the ultrasonic atomizing sheet 22 and the liquid guiding member 21, reduce the stress and vibration mechanical energy loss of the ultrasonic atomizing sheet 22, and improve the atomization efficiency; furthermore, by setting the outer contour of the protrusion 2222 to a spherical cap surface, the sidewall of the protrusion 2222 can also atomize the aerosol generating matrix through vibration, further improving the atomization efficiency. Furthermore, by setting the ratio of the dimension of the protrusion 2222 in the thickness direction of the ultrasonic atomizing plate 22 to the inner diameter of the bottom of the spherical cap surface of the protrusion 2222 to 0.05-0.15, the atomization amount is increased, thereby improving the user experience.

[0088] As shown in Figures 2 and 3, the atomizer base 10 includes an atomizer top seat 11 and an atomizer base 12, with the atomizer top seat 11 located on the top side of the atomizer base 12.

[0089] The atomizer top mount 11 and the atomizer base 12 are detachably connected. The detachable connection methods include, but are not limited to, threaded connection, screw connection, or snap-fit ​​connection.

[0090] For example, as shown in Figures 2 to 4, the liquid storage chamber 100a is located on the top side of the atomizing seat 10, the ultrasonic atomizing plate 22 is arranged perpendicular to the top and bottom direction (i.e., the height direction) of the atomizer 100, the liquid outlet of the liquid inlet channel 10b is located on the bottom side of the liquid guide 21, and the atomizing chamber 10a is located on the top side of the ultrasonic atomizing plate 22.

[0091] The mist outlet of the atomizing chamber 10a is connected to the air outlet channel 30a. The air outlet channel 30a is a straight channel extending along the height direction of the atomizer 100. The straight air outlet channel 30a has a simple structure, is easy to process, and has low airflow resistance.

[0092] When the atomizer 100 is in operation, the aerosol generation matrix in the liquid storage chamber 100a is atomized from bottom to top towards the atomization chamber 10a through the liquid inlet channel 10b. At the same time, the atomized aerosol is discharged from the mist outlet to the air outlet channel 30a along with the air entering through the air inlet channel, and finally discharged from the air outlet of the air outlet channel 30a for user use.

[0093] This upward atomization method reduces the flow path length of the aerosol formed after atomization, allowing the aerosol to reach the outlet of the gas outlet channel 30a more quickly for user use. Reducing the flow path length also decreases the likelihood of aerosol condensation due to an excessively long path, preventing aroma and concentration reduction caused by aerosol loss. Simultaneously, it avoids large condensate droplets clogging the gas outlet channel 30a or leaking into the power supply component 200, thus preventing damage to the device.

[0094] In addition, in this upward atomization method, the aerosol generating matrix needs to be transported upward into the atomization chamber 10a under the action of the ultrasonic atomizing plate 22 to overcome gravity. In this way, when the atomizer 100 is not in working state, that is, when the ultrasonic atomizing plate 22 is not vibrating, it is difficult for the aerosol generating matrix in the liquid storage chamber 100a to enter the atomization chamber 10a through the ultrasonic atomizing plate 22, which reduces the possibility of leakage. At the same time, it can well preserve the aroma of the aerosol generating matrix in the liquid storage chamber 100a.

[0095] In some embodiments, the metal microporous sheet 222 includes at least one of stainless steel sheet, titanium alloy sheet, palladium-nickel alloy sheet, or gold-plated sheet.

[0096] In other words, the material of the metal microporous sheet 222 may include at least one of stainless steel, titanium alloy, palladium-nickel alloy or gold plating.

[0097] Here, the metal microporous sheet 222 is made of stainless steel, titanium alloy, palladium-nickel alloy, or gold-plated parts. Stainless steel, titanium alloy, palladium-nickel alloy, or gold-plated parts have high hardness, so the metal microporous sheet 222 can maintain its shape well and is not easily deformed even during vibration.

[0098] Of course, in some other embodiments, the metal microporous sheet 222 may also be made of any other suitable material.

[0099] Here, the protrusion 2222 can be in contact with the liquid guide 21, which is beneficial for the liquid supply between the liquid guide 21 and the protrusion 2222; or there can be a certain gap between the protrusion 2222 and the liquid guide 21, so that the liquid supply between the liquid guide 21 and the protrusion 2222 can be achieved by the action of capillary force, so that an oil film (aerosol generation matrix film) is formed between the protrusion 2222 and the liquid guide 21, that is, the aerosol generation matrix is ​​in real-time contact with the ultrasonic atomizing plate 22, and the influence of the liquid guide 21 on the vibration of the protrusion 2222 can be reduced, thereby improving the atomization efficiency and the service life of the ultrasonic atomizing plate 22.

[0100] The working principle of the atomizing core 20 is mainly to convert electrical energy into high-frequency vibrational mechanical energy through the piezoelectric ceramic transducer 221, which drives the metal microporous sheet 222 to vibrate at high frequency. The aerosol generation matrix passes through the micropores 22a 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 221.

[0102] In some embodiments, the piezoelectric ceramic 221 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 can be used, which is beneficial to improving the atomization effect of the ultrasonic atomizing plate 22.

[0104] It should be noted that the specific shape of the ultrasonic atomizing plate 22 is not limited here.

[0105] For example, the ultrasonic atomizing plate 22 is generally circular. The edges of the circular ultrasonic atomizing plate 22 are smooth and there are no protruding sharp corners, which can reduce stress concentration and prevent damage to the ultrasonic atomizing plate 22. Of course, in some other embodiments, the ultrasonic atomizing plate 22 may also be in any other suitable shape.

[0106] For example, the ultrasonic atomizing plate 22 is of moderate size, which can ensure atomization efficiency and avoid the situation where the ultrasonic atomizing plate 22 is too large, which would be unfavorable for assembly into the atomizer 100.

[0107] It should be noted that the specific shape of the protrusion 2222 is not limited here.

[0108] In some embodiments, referring to Figures 3 and 4, the protrusion 2222 includes a planar segment 2223 and a curved segment 2224, with the curved segment 2224 surrounding the periphery of the planar segment 2223. The curved segment 2224 is connected to the flat plate 2221.

[0109] In other words, the middle area of ​​the protrusion 2222 is a planar segment 2223, and the planar segment 2223 is connected to the flat plate 2221 through the curved surface segment 2224.

[0110] For example, the plane containing the planar segment 2223 is parallel to the plane containing the flat plate portion 2221.

[0111] It is understandable that the ultrasonic atomizing plate 22 is connected to the piezoelectric ceramic 221 through the flat plate portion 2221, and the protrusion 2222 atomizes the aerosol generating matrix through vibration. As a result, the vibration at the center of the protrusion 2222 is relatively large.

[0112] In this embodiment, the protrusion 2222 is configured to include a planar segment 2223 and a curved segment 2224. This means that the middle region of the protrusion 2222 is a planar segment 2223, which helps to improve the structural strength of the middle region of the protrusion 2222 and thus improve the reliability of the protrusion 2222. The planar segment 2223 is connected to the flat plate 2221 through the curved segment 2224. That is, the setting of the curved segment 2224 helps to improve the atomization efficiency.

[0113] In some embodiments, 0.2mm ≤ H ≤ 1mm. That is, the size of the protrusion 2222 in the thickness direction of the ultrasonic atomizing sheet 22 is 0.2mm-1mm.

[0114] Here, in the embodiment where the plane of the flat plate portion 2221 of the ultrasonic atomizing plate 22 is perpendicular to the height direction of the atomizer 100, the thickness direction of the ultrasonic atomizing plate 22 is the height direction of the atomizer 100.

[0115] The dimension of the protrusion 2222 in the thickness direction of the ultrasonic atomizing sheet 22 can be any one of 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.48mm, 0.5mm, 0.55mm, 0.58mm, 0.6mm, 0.65mm, 0.68mm, 0.7mm, 0.75mm, 0.78mm, 0.8mm, 0.85mm, 0.88mm, 0.9mm, 0.95mm, 0.97mm, and 1mm, or any value between two of them.

[0116] In this embodiment, by setting the size of the protrusion 2222 in the thickness direction of the ultrasonic atomizing sheet 22 to 0.2mm-1mm, the size of the protrusion 2222 within this range is moderate, which not only has good atomization efficiency but also improves the structural strength of the protrusion 2222, thereby improving the reliability of the protrusion 2222. It also facilitates the conduction of the aerosol generation matrix to the protrusion 2222 by the liquid guiding component 21. In addition, it is also beneficial to increase the atomization volume.

[0117] In some embodiments, 3mm≤D≤8mm. The inner diameter of the bottom of the spherical cap of the protrusion 2222, or in other words, the equivalent diameter of the projection of the protrusion 2222 on a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 22, is 3mm-8mm.

[0118] The inner diameter of the bottom of the spherical surface of the protrusion 2222 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, 8mm or any value between two of them.

[0119] In this embodiment, by setting the inner diameter of the bottom of the spherical surface of the protrusion 2222 to 3mm-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 100.

[0120] In some embodiments, please refer to Figures 3 and 4. The protrusion 2222 includes a micropore region with micropores 22a formed therein. On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 22, the equivalent diameter of the projection of the micropore region is D1, where 2mm≤D1≤4mm.

[0121] 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, in the embodiment where the projection of the protrusion 2222 is circular, the equivalent diameter is the diameter of the projection of the protrusion 2222.

[0122] For example, the protrusion 2222 also includes a non-porous region without micropores 22a.

[0123] The equivalent diameter of the projected micropore region can be any point value of 2mm, 2.5mm, 3mm, 3.5mm, or 4mm, or any point value between two of them.

[0124] In this embodiment, by setting the equivalent diameter of the projection of the microporous region to 2mm-4mm, it is beneficial to ensure that the metal microporous sheet 222 has sufficient structural strength, and also to improve the atomization efficiency and atomization amount.

[0125] In some embodiments, referring to Figures 3 and 4, the micropore 22a includes a liquid suction port on the side opposite to the piezoelectric ceramic 221. The pore size of the liquid suction port is D2, where 20 μm ≤ D2 ≤ 40 μm.

[0126] The aperture of the suction port can be any one of 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm, 30μm, 31μm, 32μm, 33μm, 34μm, 35μm, 36μm, 37μm, 38μm, 39μm, 40μm or any value between two of them.

[0127] The liquid suction port is located on the side of the metal microporous sheet 222 away from the piezoelectric ceramic 221, that is, the liquid suction port is located on the liquid suction surface of the metal microporous sheet 222.

[0128] In this embodiment, by setting the pore size of the suction port to 20μm-40μm, the aerosol generating matrix can be improved to enter the micropore 22a through the suction port 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 22 to act as a seal when the atomizer 100 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 100a is reduced.

[0129] In some embodiments, please refer to Figures 3 and 4, the distance between adjacent suction ports is L1, 30μm≤L1≤100μm.

[0130] The spacing between adjacent aspiration ports can be any one of the following values ​​or any combination of two: 30μm, 31μm, 32μm, 33μm, 34μm, 35μm, 36μm, 37μm, 38μm, 39μm, 40μm, 43μm, 45μm, 50μm, 52μm, 55μm, 60μm, 65μm, 68μm, 70μm, 73μm, 75μm, 80μm, 85μm, 88μm, 90μm, 92μm, 95μm, and 100μm.

[0131] In this embodiment, by setting the spacing between adjacent suction ports to 30μm-100μm, the aerosol generating matrix can be improved to enter the micropores 22a through the suction ports to atomize the aerosol generating matrix. This improves the atomization efficiency and atomization amount, while also giving the ultrasonic atomizing sheet 22 a certain structural strength.

[0132] In some embodiments, referring to Figures 3 and 4, the micropore 22a includes a mist outlet facing the piezoelectric ceramic 221. The pore size of the mist outlet is D3, where 1 μm ≤ D3 ≤ 2 μm.

[0133] The aperture of the mist outlet can be any one of 1μm, 1.1μm, 1.2μm, 1.3μm, 1.4μm, 1.5μm, 1.6μm, 1.7μm, 1.8μm, 1.9μm, or 2μm, or any value between two of them.

[0134] It should be noted that large aerosol particles can affect the user's taste experience. Therefore, the pore size of the micropores 22a needs to be appropriate so that the particle size of the aerosol formed after vibration and atomization by the ultrasonic atomizing plate 22 is appropriate.

[0135] The mist outlet is located on the side of the metal microporous sheet 222 facing the piezoelectric ceramic 221, which means that the liquid suction port is located on the liquid suction surface of the metal microporous sheet 222.

[0136] In this embodiment, by setting the aperture of the mist outlet of the micropore 22a to between 1μm and 2μm, the aperture of the mist outlet within this range is moderate, so that the aerosol particles formed after the ultrasonic atomizing plate 22 vibrates and atomizes through the aperture of the micropore 22a 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.

[0137] In some embodiments, referring to Figures 3 and 4, the dimension of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22 is H1, where 0.03 mm ≤ H1 ≤ 0.08 mm.

[0138] Here, the dimension of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22 is the wall thickness of the metal microporous sheet 222, that is, the dimension of the flat plate portion 2221 of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 222, and does not refer to the dimension of the protrusion portion 2222 in the thickness direction of the ultrasonic atomizing sheet 222.

[0139] Here, the dimension of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22 can be any one of 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm or any combination thereof.

[0140] The larger the size of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22, the greater the structural strength of the metal microporous sheet 222. The smaller the size of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22, the more beneficial it is to improve the vibration frequency of the metal microporous sheet 222.

[0141] In this embodiment, by setting the size of the metal microporous sheet 222 in the thickness direction of the ultrasonic atomizing sheet 22 to 0.03mm-0.08mm, the size within this range is moderate. This not only ensures that the metal microporous sheet 222 has sufficient structural strength, but also helps to improve the toughness of the metal microporous sheet 222, thereby increasing the vibration frequency of the metal microporous sheet 222.

[0142] In some embodiments, please refer to Figures 3 and 4. On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 22, the equivalent diameter of the projection of the metal microporous sheet 222 is D4, where 13mm≤D4≤14mm.

[0143] Here, on the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet 22, the equivalent diameter of the projection of the metal microporous sheet 222 can be any one of 13mm, 13.5mm, 13.7mm, and 14mm, or any value between two of them.

[0144] In this embodiment, on the projection surface perpendicular to the thickness direction of the ultrasonic atomizing sheet 22, the equivalent diameter of the projection of the metal microporous sheet 222 is set to 13mm-14mm. The equivalent diameter within this range is appropriate, which not only enables the atomizer 100 to have a certain atomization efficiency and atomization amount, but also helps to improve the structural compactness of the atomizer 100.

[0145] In some embodiments, please refer to Figures 4 to 6, the diameter of the bypass through hole 2211 is D5, 4mm≤D5≤6mm.

[0146] Here, the diameter of the clearance through hole 2211 can be any one of 4mm, 4.2mm, 4.5mm, 4.7mm, 5mm, 5.3mm, 5.5mm, 5.8mm, and 6mm, or any value between two of them.

[0147] In this embodiment, by setting the aperture of the avoidance through hole 2211 to 4mm-6mm, the atomizer 100 can have a certain atomization efficiency and atomization amount, while also improving the structural compactness of the atomizer 100.

[0148] In some embodiments, please refer to Figure 6, the outer diameter of the piezoelectric ceramic 221 is D6, 13mm≤D6≤14mm.

[0149] Here, the outer diameter of the piezoelectric ceramic 221 can be any one of 13mm, 13.5mm, 13.7mm, and 14mm, or any value between two of them.

[0150] In this embodiment, by setting the outer diameter of the piezoelectric ceramic 221 to 13mm-14mm, the outer diameter within this range is appropriate. This not only enables the atomizer 100 to have a certain atomization efficiency and atomization amount, but also helps to improve the structural compactness of the atomizer 100.

[0151] In some embodiments, please refer to FIG6, the dimension of the piezoelectric ceramic 221 in the thickness direction of the ultrasonic atomizing sheet 22 is H2, 0.4mm≤H2≤0.8mm.

[0152] The dimension of the piezoelectric ceramic 221 in the thickness direction of the ultrasonic atomizing sheet 22 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, or 0.8mm, or any value between two of them.

[0153] In some embodiments, as shown in Figures 2 to 5, the central axis of the protrusion 2222 is parallel to the central axis of the air outlet channel 30a.

[0154] For example, the central axis of the protrusion 2222 coincides with the central axis of the air outlet channel 30a. Considering assembly tolerances and manufacturing errors of parts, the coincidence here can be complete or approximately coincident.

[0155] In this embodiment, by setting the central axis of the protrusion 2222 to be parallel to the central axis of the air outlet channel 30a, the protrusion 2222 can be directly facing the air outlet channel 30a. In this way, the aerosol generated by the atomization of the aerosol by the protrusion 2222 can directly enter the air outlet channel 30a, which improves the situation where the aerosol contacts the side wall of the air outlet channel 30a and forms condensate, which helps to reduce the generation of condensate and thus improves the atomization efficiency.

[0156] In some embodiments, please refer to Figures 2 and 3. On a projection plane perpendicular to the height direction of the atomizer 100, the projection of the protrusion 2222 is located within the projection range of the air outlet channel 30a.

[0157] In other words, on a cross section perpendicular to the height direction of the atomizer 100, the cross-sectional dimension of the protrusion 2222 is smaller than the cross-sectional dimension of the air outlet channel 30a.

[0158] In this embodiment, by placing the projection of the protrusion 2222 within the projection range of the air outlet channel 30a, the aerosol generated by the atomization of the protrusion 2222 can directly enter the air outlet channel 30a. This improves the situation where the aerosol contacts the side wall of the air outlet channel 30a or the cavity wall of the atomization chamber 10a to form condensate, further reducing the generation of condensate and further improving the atomization efficiency.

[0159] In some embodiments, as shown in Figures 3 and 4, the central axes of the micropore 22a, the metal microporous sheet 222, and the piezoelectric ceramic 221 are parallel.

[0160] For example, the central axes of the micropore 22a, the metal micropore sheet 222, and the piezoelectric ceramic 221 are parallel. Considering assembly tolerances and manufacturing errors of the parts, the parallelism described here can be completely parallel or approximately parallel.

[0161] In this embodiment, by setting the central axes of the micropores 22a, the metal microporous sheet 222, and the piezoelectric ceramic 221 to be parallel, the micropores 22a of the protrusion 2222 can be aligned with the air outlet channel 30a. In this way, the aerosol generated by the atomization of the aerosol by the protrusion 2222 can directly enter the air outlet channel 30a, improving the situation where the aerosol contacts the sidewall of the air outlet channel 30a to form condensate, which helps to reduce the generation of condensate and thus improve the atomization efficiency.

[0162] In some embodiments, the dynamic viscosity of the aerosol generating matrix at room temperature ranges from 1 cp to 4 cp.

[0163] 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.

[0164] In some embodiments, the ultrasonic atomizing plate 22 operates at a frequency of 120kHz-160kHz.

[0165] The operating frequency of the ultrasonic atomizing plate 22 can be any one of 120kHz, 125kHz, 130kHz, 135kHz, 140kHz, 145kHz, 150kHz, 155kHz, 160kHz or any value between two of them.

[0166] In this embodiment, by setting the operating frequency of the ultrasonic atomizing plate 22 to 120kHz-160kHz, the atomizer 100 can have a certain atomization efficiency and atomization amount, and the ultrasonic atomizing plate 22 can also have a certain service life at this operating frequency.

[0167] In some embodiments, the resonant impedance of the ultrasonic atomizing plate 22 is less than 100Ω.

[0168] In some embodiments, the driving voltage of the ultrasonic atomizing plate 22 is 60Vpp-100Vpp.

[0169] The driving voltage of the ultrasonic atomizing plate 22 can be any one of 60Vpp, 65Vpp, 70Vpp, 75Vpp, 80Vpp, 85Vpp, 90Vpp, 95Vpp, and 100Vpp, or any value between two of them.

[0170] Here, by setting the operating frequency of the ultrasonic atomizing plate 22 to 120kHz-160kHz, setting the resonant impedance of the ultrasonic atomizing plate 22 to less than 100Ω, and setting the driving voltage of the ultrasonic atomizing plate 22 to 60Vpp-100Vpp, the atomizer 100 can have better atomization efficiency and atomization volume.

[0171] To address the issue of low atomization volume (less than 8 mg / 3 s) in related technologies, this disclosure provides an ultrasonic atomizing plate 22, an atomizer 100, and an aerosol generating device 1000. The ultrasonic atomizing plate 22, atomizer 100, and aerosol generating device 1000 utilize a high-performance ultrasonic atomizing plate 22, and the protrusions 2222 and micropores 22a of the ultrasonic atomizing plate 22 are designed to achieve a large atomization volume, making it suitable for water-based ultrasonic aerosol generating device 1000 products. The performance of the ultrasonic atomizing plate 22 is analyzed below based on experimental data from several embodiments.

[0172] Example 1:

[0173] Atomization volume test method: Connect the ultrasonic atomizing core 20 with micropore 22a to the same circuit and atomize the same water-based aerosol to generate a matrix. Record and calculate the atomization volume.

[0174] It can be seen that when H / D equals 0.04, the atomization amount is 6 mg / 3 s, which is less than 8 mg / 3 s.

[0175] Example 2:

[0176] Atomization volume test method: Connect the ultrasonic atomizing core 20 with micropore 22a to the same circuit and atomize the same water-based aerosol to generate a matrix. Record and calculate the atomization volume.

[0177] It can be seen that when H / D equals 0.05, the atomization amount is 15mg / 3s, which is greater than 8mg / 3s.

[0178] Example 3:

[0179] Atomization volume test method: Connect the ultrasonic atomizing core 20 with micropore 22a to the same circuit and atomize the same water-based aerosol to generate a matrix. Record and calculate the atomization volume.

[0180] It can be seen that when H / D equals 0.15, the atomization amount is 14 mg / 3s, which is greater than 8 mg / 3s.

[0181] Example 4:

[0182] Atomization volume test method: Connect the ultrasonic atomizing core 20 with micropore 22a to the same circuit and atomize the same water-based aerosol to generate a matrix. Record and calculate the atomization volume.

[0183] It can be seen that when H / D equals 0.05, the atomization amount is 8mg / 3s, which is equal to 8mg / 3s.

[0184] It can be seen that on the projection surface perpendicular to the thickness direction of the ultrasonic atomizing plate 22, the equivalent diameter of the projection of the protrusion 2222 and the size of the protrusion 2222 in the thickness direction of the ultrasonic atomizing plate 22 are related to the atomization amount. By setting the H / D range to 0.05-0.15, it is beneficial to increase the atomization amount, thereby improving the taste and thus improving the user experience.

[0185] In the description of this disclosure, references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this disclosure. In this disclosure, 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 any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine the different embodiments or examples described in this disclosure and the features of the different embodiments or examples without contradiction.

[0186] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure are included within the scope of protection of this disclosure.

Claims

1. An ultrasonic atomizing sheet, used in an aerosol generating device, comprising: Piezoelectric ceramics, with a clearance through-hole in the middle region; 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 outer contour of the protruding portion is a spherical cap surface and the protruding direction is opposite to the clearance through hole, the protruding portion is provided with multiple through micropores, and the metal microporous sheet atomizes the aerosol generation matrix into aerosol during vibration. Wherein, the inner diameter of the bottom of the spherical cap of the protrusion is D, and the height of the protrusion in the thickness direction of the metal microporous sheet is H, 0.05≤H / D≤0.

15.

2. The ultrasonic atomizing sheet according to claim 1, wherein, The protrusion 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 D1, where 2mm≤D1≤4mm.

3. The ultrasonic atomizing sheet according to claim 1, wherein, The micropores include a liquid suction port on the side opposite to the piezoelectric ceramic; The pore size of the suction port is D2, 20μm≤D2≤40μm; and / or, The distance between adjacent suction ports is L1, where 30μm≤L1≤100μm.

4. The ultrasonic atomizing sheet according to claim 1, wherein, The micropore includes a mist outlet facing the piezoelectric ceramic; the diameter of the mist outlet is D3, 1μm≤D3≤2μm.

5. The ultrasonic atomizing sheet according to claim 1, wherein, 3mm≤D≤8mm; and / or, 0.2mm≤H≤1mm.

6. The ultrasonic atomizing sheet according to claim 1, wherein, The metal microporous sheet has a thickness dimension H1, where 0.03 mm ≤ H1 ≤ 0.08 mm; and / or, On the projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet, the equivalent diameter of the projected metal microporous sheet is D4, where 13mm≤D4≤14mm.

7. The ultrasonic atomizing sheet according to claim 1, wherein, The metal microporous sheet includes at least one of stainless steel sheet, titanium alloy sheet, palladium-nickel alloy sheet, or gold-plated sheet.

8. The ultrasonic atomizing sheet according to claim 1, wherein, The diameter of the clearance through hole is D5, 4mm≤D5≤6mm; and / or, The outer diameter of the piezoelectric ceramic is D6, and 13mm≤D6≤14mm.

9. The ultrasonic atomizing sheet according to claim 1, wherein, The piezoelectric ceramic has a dimension H2 in the thickness direction of the ultrasonic atomizing sheet, where 0.4 mm ≤ H2 ≤ 0.8 mm; and / or, The piezoelectric ceramic is made of at least one of lead zirconate titanate, sodium potassium niobate, or barium calcium zirconate titanate.

10. The ultrasonic atomizing sheet according to claim 1, wherein, The central axes of the micropores, the metal microporous sheet, and the piezoelectric ceramic are parallel; and / or, The dynamic viscosity of the aerosol generating matrix at room temperature ranges from 1 cp to 4 cp.

11. An atomizer comprising the ultrasonic atomizing plate according to any one of claims 1-10.

12. The atomizer according to claim 11, wherein, The ultrasonic atomizing plate operates at a frequency of 120kHz-160kHz; and / or, The resonant impedance of the ultrasonic atomizing plate is less than 100Ω; and / or, The driving voltage of the ultrasonic atomizing plate is 60Vpp-100Vpp.

13. The atomizer according to claim 11, wherein, The atomizer includes: A housing assembly having an air outlet channel formed therein, the air outlet channel extending along the height direction of the atomizer; An atomizing base, at least a portion of which is disposed within the housing assembly; a liquid storage chamber is provided within the housing assembly for storing the aerosol generation matrix; the atomizing base has an atomizing cavity and a liquid inlet channel, the atomizing cavity being connected to the gas outlet channel, and the liquid inlet of the liquid inlet channel being connected to the liquid storage cavity; The atomizing core includes a liquid guiding component and an ultrasonic atomizing plate. The outlet of the liquid inlet channel is in liquid communication with the liquid guiding component. The ultrasonic atomizing plate is located on the top side of the liquid guiding component and protrudes towards one side of the liquid guiding component to form the protrusion.

14. An aerosol generating device, comprising a power supply assembly and an atomizer according to any one of claims 1-13, wherein the power supply assembly is electrically connected to the atomizer.

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