Atomiser and electronic atomising device

Abstract

The application relates to the technical field of electronic atomization, and provides an atomizer and an electronic atomization device, which comprise a base, at least two annular piezoelectric ceramic sheets, a pressing cover, a diaphragm sheet and a microporous plate. The base comprises a base body and an extension part, and the base body and the extension part are mutually penetrated to form a first through hole. The at least two annular piezoelectric ceramic sheets are stacked and surround the outer side of the extension part. The first side and the second side of the annular piezoelectric ceramic sheet are respectively provided with an electrode sheet. The pressing cover is connected with the extension part and is provided with a second through hole which is communicated with the first through hole. The at least two annular piezoelectric ceramic sheets are clamped between the base body and the pressing cover. The diaphragm sheet is arranged between the first through hole and the second through hole and is provided with a throttling hole, the opening of the throttling hole faces the first through hole, and the closing of the throttling hole faces the second through hole. The microporous plate is retained on the pressing cover and covers the second through hole. The microporous plate is provided with micropores. The atomizer can improve the atomization efficiency of viscous fluid.

Description

Technical Field

[0001] This invention relates to the field of electronic atomization technology, and more particularly to an atomizer and an electronic atomization device. Background Technology

[0002] Traditional mesh atomizers have seen rapid development and increasingly widespread application due to their small size, small droplet diameter, uniform atomization, and low vibration and noise. However, these atomizers can only atomize liquids with low viscosity; it is extremely difficult to form an atomized mist from liquids with high viscosity. Furthermore, the microporous plate is prone to clogging, resulting in rapid performance degradation and a short service life for the atomizer. Summary of the Invention

[0003] The atomizer provided in this application is designed to solve the problem of atomizing high-viscosity liquids.

[0004] To solve the above-mentioned technical problems, this application adopts a technical solution as follows: An atomizer is provided. The atomizer includes a base, at least two annular piezoelectric ceramic sheets, a pressure cover, a diaphragm, and a microporous plate. The base includes a substrate and an extension, the extension protruding outward from the substrate. The substrate and the extension are hollow and interconnected to form a first through hole, which provides a fluid channel. At least two annular piezoelectric ceramic sheets are stacked and surround the outside of the extension. Each annular piezoelectric ceramic sheet has a first side and a second side, and each of the first and second sides is provided with an electrode. The pressure cover is connected to the extension and has a second through hole, which communicates with the first through hole. At least two annular piezoelectric ceramic sheets are sandwiched between the substrate and the pressure cover. The diaphragm is disposed between the first and second through holes and has a throttling orifice. The throttling orifice has an opening and a closing, the opening facing the first through hole and the closing facing the second through hole, and the cross-sectional area of ​​the opening is larger than the cross-sectional area of ​​the closing. The microporous plate is held on the pressure cover and covers the second through hole. The microporous plate and the diaphragm are spaced apart along the axial direction of the second through hole, and the microporous plate has multiple micropores that penetrate the microporous plate.

[0005] In some embodiments, the annular piezoelectric ceramic sheet is arranged substantially perpendicular to the axial direction of the first or second through hole.

[0006] In some embodiments, the diaphragm and the microporous plate are arranged substantially parallel to the annular piezoelectric ceramic sheet.

[0007] In some embodiments, the micropore has a large-aperture end and a small-aperture end, with the large-aperture end facing the second through hole and the small-aperture end facing away from the second through hole.

[0008] In some embodiments, the number of at least two annular piezoelectric ceramic sheets is even; and / or, the atomizer further includes an insulating layer. The insulating layer is located between the extension and the at least two annular piezoelectric ceramic sheets such that the extension and the at least two annular piezoelectric ceramic sheets are insulated.

[0009] In some embodiments, the ratio of the thickness of the substrate to the thickness of the at least two piezoelectric ceramic sheets ranges from 0.5 to 2.

[0010] In some embodiments, the extension includes a first part and a second part connected end to end in sequence; at least two annular piezoelectric ceramic sheets are located on the outer periphery of the first part, and the inner periphery of the pressure cover is fitted onto the outer periphery of the second part.

[0011] In some embodiments, the material of the annular piezoelectric ceramic sheet includes one or more of barium titanate, lead zirconate titanate binary, and PZT materials.

[0012] In some embodiments, the outer periphery of the electrode sheet is provided with solder feet extending radially outward.

[0013] In some embodiments, the length of the insulating layer along its axial direction is greater than or equal to the total thickness of at least two annular piezoelectric ceramic sheets.

[0014] In some embodiments, the pressure cover includes a first segment and a second segment connected to each other. The first segment is provided with an internal thread, and the extension is provided with an external thread corresponding to the internal thread, so that the pressure cover and the extension are connected by the internal thread and the external thread.

[0015] In some embodiments, the first segment is formed with an anti-slip structure; and / or, the second segment is formed with external threads.

[0016] In some embodiments, a support surface is formed radially within the first or second segment, and a diaphragm is disposed on the support surface; and / or, the end face of the second segment away from the first segment is an annular plane for supporting the microporous plate.

[0017] In some embodiments, a plurality of throttling orifices are arranged radially along the diaphragm.

[0018] In some embodiments, a plurality of micropores are disposed in the central region of the microplate.

[0019] In some embodiments, the aperture of the small hole end ranges from 3 to 10 μm.

[0020] In some embodiments, the atomizer further includes an end cap. The end cap is connected to the pressure cover and has an atomization channel communicating with the second through hole, the atomization channel avoiding the central region of the microporous plate.

[0021] One technical solution adopted in this application is to provide an electronic atomizing device, which includes the atomizer as described above.

[0022] The beneficial effects of this application's embodiments are as follows: Unlike the prior art, the atomizer provided in this application's embodiments includes a base, at least two annular piezoelectric ceramic sheets, a pressure cover, a diaphragm, and a microporous plate. The base forms a first through-hole, which provides a fluid channel. The pressure cover has a second through-hole, which communicates with the first through-hole. At least two annular piezoelectric ceramic sheets are sandwiched between the base and the pressure cover. The diaphragm has a throttling orifice and is disposed between the first and second through-holes. The throttling orifice has an opening and a constriction, with the opening facing the first through-hole and the constriction facing the second through-hole; the cross-sectional area of ​​the opening is larger than the cross-sectional area of ​​the constriction. The microporous plate is disposed at the end of the pressure cover away from the annular piezoelectric ceramic sheets. The microporous plate has micropores. The atomizer provided in this application fully utilizes the characteristics of pressure-concentrated energy and amplified amplitude. The forced vibration of the diaphragm causes the fluid to continuously flow through the throttling orifice of the diaphragm towards the second through-hole, continuously increasing the liquid pressure between the diaphragm and the microporous plate within the second through-hole. Consequently, the microporous plate is also forced to undergo high-frequency axial vibration, squeezing the liquid out of the micropores, thus forming an atomized mist. The atomizer provided in this application is less prone to clogging and can atomize high-viscosity liquids. The electronic atomization device provided in this application includes the above-mentioned atomizer and therefore has the same advantages. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0024] Figure 1 This is a three-dimensional structural diagram of the atomizer provided in the embodiments of this application;

[0025] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the atomizer.

[0026] Figure 3 yes Figure 1 The diagram shown is an exploded view of the atomizer.

[0027] Figure 4 yes Figure 1 An exploded view of the annular piezoelectric ceramic plate of the atomizer shown;

[0028] Figure 5 yes Figure 1 A cross-sectional schematic diagram of a portion of the atomizer's structure is shown.

[0029] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the diaphragm of the atomizer shown;

[0030] Figure 7 yes Figure 6 A schematic diagram of the diaphragm shown;

[0031] Figure 8 yes Figure 1 A three-dimensional schematic diagram of the microporous plate of the atomizer shown;

[0032] Figure 9 yes Figure 8 The diagram shows a cross-sectional view of a portion of the microplate structure.

[0033] Icon labels:

[0034] 100. Atomizer; 1. Base; 2. Annular piezoelectric ceramic plate; 3. Pressure cover; 4. Diaphragm; 5. Microporous plate; 6. Insulating layer; 7. End cap; 11. Substrate; 111. Anti-slip structure; 12. Extension; 121. First part; 122. Second part; 13. First through hole; 21. First side; 22. Second side; 23. Electrode plate; 231. Welding foot; 31. Second through hole; 32. Anti-slip structure; 321. Support surface; 33. First section; 34. Second section; 35. Gradual narrowing section; 41. Throttling orifice; 411. Opening; 412. Closing; 511. Large orifice end; 512. Small orifice end; 71. Fog outlet channel. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] The atomizer provided in this application will be described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figures 1 to 7As shown, the atomizer 100 includes a base 1, at least two annular piezoelectric ceramic sheets 2, a pressure cover 3, a diaphragm sheet 4, and a microporous plate 5. The base 1 includes a body 11 and an extension 12, the extension 12 protruding outward from the body 11. The body 11 and the extension 12 are hollow and interconnected to form a first through hole 13, which provides a fluid channel. At least two annular piezoelectric ceramic sheets 2 are stacked and surround the outside of the extension 12. The annular piezoelectric ceramic sheet 2 has a first side 21 and a second side 22, and each of the first side 21 and the second side 22 of the annular piezoelectric ceramic sheet 2 is provided with an electrode sheet 23. The pressure cover 3 is connected to the extension 12 and has a second through hole 31, which communicates with the first through hole 13. At least two annular piezoelectric ceramic sheets 2 are sandwiched between the base 11 and the pressure cover 3. The diaphragm 4 has a throttling orifice 41 and is positioned between the first through hole 13 and the second through hole 31. The throttling orifice 41 has an opening 411 and a closing opening 412. The opening 411 faces the first through hole 13, and the closing opening 412 faces the second through hole 31. The cross-sectional area of ​​the opening 411 is larger than the cross-sectional area of ​​the closing opening 412. The microporous plate 5 is held on the pressure cover 3 and covers the second through hole 31. The microporous plate 5 and the diaphragm 4 are spaced apart along the axial direction of the second through hole 31, and the microporous plate 5 has a plurality of microholes 51 penetrating through the microporous plate 5.

[0040] The base 1 can be made of a high-density metal material, such as stainless steel, copper, or copper alloy; or it can be made of an insulating material, such as polytetrafluoroethylene (PTFE), ceramic, polyimide, silicon carbide, carbon fiber composite material, or ceramic fiber composite material. The base 1 can be a circular or square ring cylinder. The number of at least two annular piezoelectric ceramic sheets 2 can be multiple, for example, 2, 3, 4, 5, or 6. The pressure cover 3 can be made of a light metal, such as aluminum alloy, magnesium alloy, or titanium alloy; or it can be made of an insulating material, such as PTFE, ceramic, polyimide, silicon carbide, carbon fiber composite material, or ceramic fiber composite material. The base 1 and the pressure cover 3 are insulated from each other. Therefore, when the base 1 is made of a metal material, the electrode sheets 23 on both sides of the annular piezoelectric ceramic sheet 2, which abut against the inner side of the extension 12, can be coated with an insulating layer, and the pressure cover 3 can be made of an insulating material. When the base 1 is made of an insulating material, the pressure cover 3 can be made of a metal material. Alternatively, both the base 1 and the pressure cover 3 can be made of insulating materials. Thus, when a voltage is applied to the annular piezoelectric ceramic sheet 2, if the base 1 is made of metal and the pressure cover 3 is made of insulating material, the base 1 becomes energized but the pressure cover 3 becomes de-energized, preventing a short circuit. Similarly, if both the base 1 and the pressure cover 3 are made of insulating material, neither becomes energized, preventing a short circuit.

[0041] The inverse piezoelectric effect refers to the phenomenon where applying a certain voltage to a material alters its length, thus converting electrical energy into mechanical energy. In this application, a voltage can be applied to a ring-shaped piezoelectric ceramic sheet 2 to convert electrical energy into mechanical energy. The ring-shaped piezoelectric ceramic sheet 2 can be axially polarized, with adjacent ring-shaped piezoelectric ceramic sheets 2 exhibiting opposite polarization. Specifically, voltages in opposite thickness directions can be applied to adjacent ring-shaped piezoelectric ceramic sheets 2, resulting in opposite polarization. This method fully utilizes the relatively high mechanical coupling coefficient of the ring-shaped piezoelectric ceramic sheet 2 during longitudinal (thickness) vibration, thus achieving a relatively high efficiency in converting electrical energy into mechanical energy.

[0042] The annular piezoelectric ceramic sheet 2 is located between the base 1 and the pressure cover 3 and is pressed tightly by the base 1 and the pressure cover 3. When the annular piezoelectric ceramic sheet 2 is energized, due to the energy concentration and amplitude amplification effect of the pressure cover, the forced vibration of the diaphragm sheet 4 located between the first through hole 13 and the second through hole 31 causes the fluid to continuously flow through the throttling hole 41 of the diaphragm sheet 4 towards the second through hole 31. The liquid pressure between the diaphragm sheet 4 and the microporous plate 5 continuously increases, and the liquid enters from the large hole end 511 of the micropore 51 and exits from the small hole end 512. When the atomizer 100 is working, the microporous plate 5 is also forced to perform high-frequency axial vibration, squeezing the liquid out of the micropores 51, thereby forming an aerosol. Compared with conventional mesh atomizers, the atomizer 100 integrates the characteristics of an axial flow pump (the side fluid pressure at the large hole end 511 of the microporous plate 5 is strong), making it less prone to clogging, capable of atomizing high-viscosity liquids, and also featuring low atomization temperature, small size, low noise, and high efficiency. Therefore... Nebulizer 100 can be widely used in medical nebulizers, fine chemicals, beauty and respiratory electronic nebulizers.

[0043] In some embodiments, the annular piezoelectric ceramic sheet 2 is arranged substantially perpendicular to the axial direction of the first through hole 13 or the second through hole 31. In this embodiment, "substantially perpendicular" means that the angle formed between the annular piezoelectric ceramic sheet 2 and the axial direction of the first through hole 13 or the second through hole 31 is 90° with a possible error of 20°. When the annular piezoelectric ceramic sheet 2 is energized, it can fully amplify the energy focusing and amplitude amplification effects of the pressure shield, causing the forced vibration of the diaphragm 4 located between the first through hole 13 and the second through hole 31 to cause fluid to continuously flow through the throttling orifice 41 of the diaphragm 4 towards the second through hole 31.

[0044] In some embodiments, the diaphragm 4 and the microporous plate 5 are arranged substantially parallel to the annular piezoelectric ceramic sheet 2. In this embodiment, "substantially parallel" means that the angle formed between the diaphragm 4 and the microporous plate 5 and the annular piezoelectric ceramic sheet 2 is 0° and may have an error of 20°. The arrangement of the diaphragm 4 and the microporous plate 5 substantially parallel to the annular piezoelectric ceramic sheet 2 ensures that the direction of fluid movement is substantially perpendicular to the diaphragm 4 and the microporous plate 5. Consequently, the fluid experiences less resistance and faster speed as it passes through the opening 411, the constriction 412, and the micropores 51.

[0045] In some embodiments, the micropore 51 has a large-hole end 511 and a small-hole end 512, with the large-hole end 511 facing the second through hole 31 and the small-hole end 512 facing away from the second through hole 31. By providing the large-hole end 511 and the small-hole end 512, the fluid experiences less resistance when passing through the large-hole end 511, while the fluid can be fully atomized when passing through the small-hole end 512.

[0046] In some embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, the number of at least two annular piezoelectric ceramic sheets 2 is even. In some embodiments, the atomizer 100 further includes an insulating layer 6. The insulating layer 6 is located between the extension 12 and the at least two annular piezoelectric ceramic sheets 2, so that the extension 12 and the at least two annular piezoelectric ceramic sheets 2 are insulated.

[0047] The insulating layer 6 can be made of plastic materials such as PA, POM, and PEEK, which have good elasticity and wear resistance while also providing excellent insulation. The inner and outer surfaces of the insulating layer 6 are adapted to the outer periphery of the extension 12, for example, as coaxial cylindrical surfaces, and its inner surface mates with the outer cylindrical surface of the extension 12. The outer surface of the insulating layer 6 is adapted to the inner hole of the annular piezoelectric ceramic sheet 2, for example, as a coaxial cylindrical surface, providing center positioning for the annular piezoelectric ceramic sheet 2. The number of at least two annular piezoelectric ceramic sheets 2 can be 2, 4, 6, 8, etc. The base 1 can be made of a high-density metal material, such as stainless steel, copper, or copper alloys. The pressure cover 3 can be made of a lightweight metal, such as aluminum alloy, magnesium alloy, or titanium alloy. When the number of at least two annular piezoelectric ceramic sheets 2 is even, the charge on the base 1 pressing the first side 21 of the annular piezoelectric ceramic sheet 2 is the same as the charge on the pressure cover 3 pressing the second side 22 of the annular piezoelectric ceramic sheet 2, thus preventing the circuit from short-circuiting through the connection between the base 1 and the pressure cover 3. The base 1 is made of a high-density metal material and the pressure cover 3 is made of a light metal material, which can further enhance the energy focusing and amplitude amplification effect of the pressure cover, thereby improving the atomization effect of the atomizer 100 on high-viscosity fluids.

[0048] In some embodiments, such as Figure 2As shown, the ratio of the thickness of the substrate 11 to the thickness of the at least two piezoelectric ceramic sheets 2 ranges from 0.5 to 2. For example, the ratio of the thickness of the substrate 11 to the thickness of the at least two piezoelectric ceramic sheets 2 can be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, etc., or any range of the above values, such as 0.5-0.7, 0.7-1.0, 0.9-1.3, 1.1-1.6, 1.4-1.8, 1.9-2.0, etc. By limiting the ratio of the thickness of the substrate 11 to the thickness of at least two piezoelectric ceramic sheets 2 within the aforementioned range, the substrate 11 has a large mass inertia, which increases the probability that the vibration of the annular piezoelectric ceramic sheet 2 will unidirectionally radiate to one side of the diaphragm sheet 4, thereby improving the atomization effect of the atomizer 100 on high-viscosity fluids.

[0049] In some embodiments, an anti-slip structure 111 is provided on the outer circumferential side of the substrate 11. For example, the anti-slip structure 111 of the substrate 11 can be an anti-slip groove, a polygonal or quincunx shape, or other structures that facilitate tightening. In some embodiments, an anti-slip structure 32 is provided on the outer circumferential side of the pressure cover 3. For example, the anti-slip structure 32 of the pressure cover 3 can be an anti-slip groove, a polygonal or quincunx shape, or other structures that facilitate tightening. By providing anti-slip structures on the substrate 11 and the pressure cover 3 respectively, it is easy to fasten the substrate 11 and the pressure cover 3 together by threads or other means, ensuring that the stacked annular piezoelectric ceramic sheets 2 have a suitable clamping force.

[0050] In some embodiments, the extension 12 includes a first portion 121 and a second portion 122 connected end-to-end. At least two annular piezoelectric ceramic sheets 2 are located on the outer periphery of the first portion 121, and the inner periphery of the pressure cover 3 is fitted onto the outer periphery of the second portion 122. The diameter of the substrate 11 is larger than the diameter of the first portion 121, and the diameter of the first portion 121 is larger than the diameter of the second portion 122. Therefore, it is advantageous for at least two annular piezoelectric ceramic sheets 2 to be clamped between the substrate 11 and the pressure cover 3 to form a stable structure.

[0051] In some embodiments, the material of the annular piezoelectric ceramic sheet 2 includes one or more of barium titanate, lead zirconate titanate binary, and PZT (lead zirconate titanate) materials. For example, in some embodiments, the annular piezoelectric ceramic sheet includes PZT material. PZT ceramics have excellent piezoelectric properties, with an electromechanical coupling coefficient nearly twice that of BaTiO3. PZT, with its strong and stable piezoelectric properties, has become the most widely used piezoelectric material. The emergence of this material has expanded piezoelectric devices from traditional transducers and filters to ignition and detonation devices, voltage transformers, and piezoelectric power generation devices. Therefore, limiting the material of the annular piezoelectric ceramic sheet to the above-mentioned range can fully utilize its material properties, resulting in a relatively high efficiency of electrical energy to mechanical energy conversion.

[0052] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the electrode plate 23 is provided with solder feet 231 extending radially outward. Each electrode plate 23 on both sides of the annular piezoelectric ceramic plate 2 is provided with a solder foot 231, which can be connected to the positive and negative terminals of a power supply, respectively, to apply voltage to the annular piezoelectric ceramic plate 2, thereby polarizing it. The electrode plate 23 on the first side 21 of the annular piezoelectric ceramic plate 2 is subjected to the same voltage as the electrode plate 23 on the first side 21 of the adjacent annular piezoelectric ceramic plate 2, which is either positive or negative, to prevent short circuit between adjacent electrode plates 23.

[0053] In some embodiments, such as Figure 2 and Figure 3 As shown, the length of the insulating layer 6 along its axial direction is greater than or equal to the total thickness of at least two annular piezoelectric ceramic sheets 2. Thus, when the substrate 11 and the pressure cover 3 are fastened together by threads or other means, the bushing and the stacked annular piezoelectric ceramic sheets are compressed together, so that the two end faces of the bushing press against the substrate 11 and the pressure cover 3, further enhancing the sealing performance of the annular piezoelectric ceramic sheets 2.

[0054] In some embodiments, such as Figure 2 As shown, the pressure cover 3 includes a first section 33 and a second section 34 that are connected to each other. The first section 33 is provided with an internal thread, and the extension 12 is provided with an external thread corresponding to the internal thread, so that the pressure cover 3 and the extension 12 are connected by the internal thread and the external thread.

[0055] In some embodiments, such as Figure 2 As shown, the first segment 33 has an anti-slip structure 32. In some embodiments, the second segment 34 has an external thread. The anti-slip structure formed on the first segment 33 can be an anti-slip groove, a polygonal or quincunx shape, or other structures that facilitate tightening. By providing anti-slip structures on the base 11 and the pressure cover 3 respectively, it is easy to fasten the base 11 and the pressure cover 3 together by threads or other means, ensuring that the stacked annular piezoelectric ceramic sheets 2 have a suitable clamping force.

[0056] In some embodiments, such as Figure 5 As shown, the pressure shield 3 also includes a tapered section 35 connecting the first section 33 and the second section 34. The outer diameter of the tapered section 35 gradually decreases in the direction toward the second section 34. For example, the outer periphery of the tapered section 35 can be an arc curve, an S-curve, etc. In this way, the unidirectional vibration radiation effect on the annular piezoelectric ceramic sheet 2 can be further enhanced, and the amplitude of the vibration at the position where the diaphragm sheet 4 is installed can be amplified, thereby increasing the flow rate and output fluid pressure of the annular piezoelectric ceramic sheet 2 and improving the efficiency of the annular piezoelectric ceramic sheet 2.

[0057] In some embodiments, such as Figure 5 As shown, a support surface 321 is formed radially within the first segment 33 or the tapered segment 35, and the diaphragm 4 is disposed on the support surface 321. In some embodiments, the end face of the second segment 34 away from the first segment 33 is an annular plane for supporting the microporous plate 5. For example, the support surface 321 is formed radially within the tapered segment 35, so the diaphragm 4 can abut against the support surface 321, which positions and stabilizes the diaphragm 4. The side face of the second segment 34 away from the first segment 33 is an annular plane, so the microporous plate 5 can also directly abut against the annular plane, which helps to improve the stability and sealing of the microporous plate 5.

[0058] In some embodiments, such as Figure 2 , Figure 6 and Figure 7 As shown, multiple throttling orifices 41 are arranged radially along the diaphragm 4. The diaphragm 4 has a unique throttling orifice structure on its surface, which functions similarly to a one-way duckbill valve. When the annular piezoelectric ceramic plate 2 contracts axially, the diaphragm 4 passively moves toward the first through hole 13. The fluid in the first through hole 13 is compressed, and the pressure increases, exceeding the pressure of the fluid in the second through hole 31. The fluid will flow through the throttling orifice 41 toward the second through hole 31. At the same time, the pressure difference between the fluid in the first through hole 13 and the second through hole 31 will increase the width of the slot of the throttling orifice 41, allowing the fluid to quickly flow through the diaphragm 4 to the second through hole 31. When the annular piezoelectric ceramic sheet 2 extends axially, the diaphragm 4 passively moves towards the second through-hole 31. The fluid in the second through-hole 31 is compressed, and the pressure increases, exceeding the pressure of the fluid in the first through-hole 13. The pressure difference between the fluids in the first through-hole 13 and the second through-hole 31 will reduce the width of the slot, or even close it, restricting the fluid from flowing in the opposite direction towards the first through-hole 13 through the throttling orifice 41. Therefore, the forced vibration of the diaphragm 4 will cause the fluid to continuously flow through the throttling orifice 41 of the diaphragm 4 towards the first through-hole 13, thus providing excellent unidirectional pressure boosting and fluid delivery.

[0059] The diaphragm 4 is preferably made of stainless steel or copper alloy with good elasticity, such as beryllium copper, phosphor bronze, or titanium copper, or it can be made of plastic materials such as PP or PEEK. The multiple throttling orifices 41 can be the same size and shape, for example, they can be slot-shaped, conical, or flared. The cross-section of the slot-shaped throttling orifice 41 can be rectangular, arc-shaped, or meniscus. The multiple throttling orifices 41 can be evenly distributed radially along the diaphragm 4, so that the fluid flows from the first through-hole 13 to the second through-hole 31 and forms uniform droplets.

[0060] In some embodiments, such as Figure 2 , Figure 8 and Figure 9As shown, multiple micropores 51 are disposed in the central region of the microporous plate 5. The microporous plate 5 can be made of a thin-walled metal material, preferably a flexible stainless steel or copper alloy, such as beryllium copper, phosphor bronze, or titanium copper. The two sides of the microporous plate 5 can be planar. For example, multiple micropores 51 are arranged radially along the central region of the microporous plate 5. The size and shape of the micropores 51 can be the same; for example, their shape can be trumpet-shaped, conical, etc. Therefore, the fluid is atomized into a uniform mist after passing through the second through-hole 31.

[0061] In some embodiments, the aperture of the orifice 512 ranges from 3 μm to 10 μm. The aperture of the orifice 512 determines the particle size of the aerosol formed by the fluid. Limiting the aperture range of the orifice 512 to the above range facilitates the formation of a uniform aerosol with suitable particle size. In some embodiments, the aperture range of the macro-orifice 511 can be set to 2-5 times the aperture range of the orifice 512. This can further improve the uniformity of the aerosol.

[0062] In some embodiments, the atomizer 100 further includes an end cap 7. The end cap 7 is connected to the pressure cover 3, and the end cap 7 has a mist outlet channel 71 communicating with the second through hole 31, which avoids the central region of the microporous plate 5. Therefore, the fluid flows through the first through hole 13 to the second through hole 31, and then through the microporous plate 5 to be atomized into a mist, which is then inhaled by the user through the mist outlet channel 71. The inner circumference of the end cap 7 may be formed with an internal thread for threaded connection with the external thread of the pressure cover 3. The material of the end cap 7 is preferably a plastic material such as PA, POM, or PEEK, which has good elasticity and wear resistance, can reduce the outward transmission of vibration energy of the pressure cover 3, reduce energy loss, and improve the efficiency of the atomizer 100.

[0063] The electronic atomizing device provided in this application includes the aforementioned atomizer 100, and also includes other components such as a power supply component, a mouthpiece, and a liquid storage component. It can be applied in fields such as medicine, beauty, food, and electronic cigarettes, and will not be described in detail here. The power supply component provides electrical energy to the atomizer 100.

[0064] The atomizer 100 provided in this embodiment includes a base 1, at least two annular piezoelectric ceramic sheets 2, a pressure cover 3, a diaphragm sheet 4, and a microporous plate 5. The base 1 forms a first through-hole 13, which provides a fluid passage. The pressure cover 3 has a second through-hole 31, which communicates with the first through-hole 13. At least two annular piezoelectric ceramic sheets 2 are sandwiched between the base 1 and the pressure cover 3. The diaphragm sheet 4 has a throttling orifice 41, and is disposed between the first through-hole 13 and the second through-hole 31. The throttling orifice 41 has an opening 411 and a closing opening 412, with the opening 411 facing the first through-hole 13 and the closing opening 412 facing the second through-hole 31. The cross-sectional area of ​​the opening 411 is larger than the cross-sectional area of ​​the closing opening 412. The microporous plate 5 is held on the pressure cover 3 and covers the second through-hole 31, with the microporous plate 5 and the diaphragm sheet 4 spaced apart along the axial direction of the second through-hole 31. The microporous plate 5 has micropores 51. The atomizer 100 provided in this application fully utilizes the characteristics of pressure-concentrating energy and amplifying amplitude. The forced vibration of the diaphragm 4 causes the fluid to continuously flow through the throttling orifice of the diaphragm 4 toward the second through-hole 31, continuously increasing the liquid pressure between the diaphragm 4 and the microporous plate 5 within the second through-hole 31. Consequently, the microporous plate 5 is also forced to undergo high-frequency axial vibration, squeezing the liquid out of the micropores 51, thereby forming an atomized mist. The atomizer 100 provided in this application is less prone to clogging and can atomize high-viscosity liquids. The electronic atomizing device provided in this application includes the above-mentioned atomizer 100 and therefore has the same advantages.

[0065] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An atomizer, characterized in that, include: The base includes a base body and an extension, the extension protruding outward from the base body, the base body and the extension body being hollow and interconnected to form a first through hole, the first through hole being used to provide a fluid channel; At least two annular piezoelectric ceramic sheets are stacked and surround the outside of the extension; each annular piezoelectric ceramic sheet has a first side and a second side, and each of the first and second sides of the annular piezoelectric ceramic sheet is provided with an electrode sheet. A pressure cover is connected to the extension and has a second through hole. The first through hole and the second through hole are connected, and the at least two annular piezoelectric ceramic sheets are sandwiched between the substrate and the pressure cover. A diaphragm is disposed between the first through hole and the second through hole. The diaphragm has a plurality of throttling holes for liquid to flow through. The throttling holes have an opening and a closing opening. The opening faces the first through hole, and the closing opening faces the second through hole. The cross-sectional area of ​​the opening is larger than the cross-sectional area of ​​the closing opening. A microporous plate is held on the pressure cover and covers the second through hole. The microporous plate and the diaphragm are spaced apart along the axial direction of the second through hole, and a plurality of micropores penetrating the microporous plate are formed on the microporous plate. The pressure cover includes a first section and a second section connected to each other, and a tapered section connected between the first section and the second section. The outer diameter of the tapered section gradually decreases in the direction toward the second section. The first section and the extension are connected.

2. The atomizer as described in claim 1, characterized in that, The annular piezoelectric ceramic sheet is arranged substantially perpendicular to the axial direction of the first or second through hole.

3. The atomizer as described in claim 2, characterized in that, The diaphragm and microporous plate are arranged substantially parallel to the annular piezoelectric ceramic sheet.

4. The atomizer as described in claim 1, characterized in that, The micropore has a large-hole end and a small-hole end, with the large-hole end facing the second through hole and the small-hole end facing away from the second through hole.

5. The atomizer as described in claim 1, characterized in that, The number of the at least two annular piezoelectric ceramic sheets is even; and / or, The atomizer further includes an insulating layer located between the extension and the at least two annular piezoelectric ceramic sheets, such that the extension and the at least two annular piezoelectric ceramic sheets are insulated.

6. The atomizer as described in claim 1, characterized in that, The ratio of the thickness of the substrate to the thickness of the at least two annular piezoelectric ceramic sheets is in the range of 0.5-2.

7. The atomizer as described in claim 1, characterized in that, The extension includes a first part and a second part connected end to end in sequence; the at least two annular piezoelectric ceramic sheets are located on the outer periphery of the first part, and the inner periphery of the pressure cover is fitted onto the outer periphery of the second part.

8. The atomizer as described in claim 1, characterized in that, The material of the annular piezoelectric ceramic sheet includes one or more of the following: barium titanate, lead zirconate titanate binary system, and PZT material.

9. The atomizer as described in claim 1, characterized in that, The electrode sheet is provided with welding feet that extend radially outward.

10. The atomizer as described in claim 5, characterized in that, The length of the insulating layer along its axial direction is greater than or equal to the total thickness of the at least two annular piezoelectric ceramic sheets.

11. The atomizer as claimed in claim 1, characterized in that, The first section is provided with an internal thread, and the extension is provided with an external thread corresponding to the internal thread, so that the pressure cover and the extension are connected through the internal thread and the external thread.

12. The atomizer as described in claim 11, characterized in that, The first segment has an anti-slip structure, and / or; The second segment has external threads.

13. The atomizer as described in claim 11, characterized in that, A support surface is formed radially within the first or second segment, and the diaphragm is disposed on the support surface; and / or The end face of the second segment away from the first segment is an annular plane, which is used to support the microporous plate.

14. The atomizer as described in claim 1, characterized in that, The plurality of throttling orifices are arranged radially along the radial direction of the diaphragm.

15. The atomizer as described in claim 1, characterized in that, The plurality of micropores are disposed in the central region of the microporous plate.

16. The atomizer as described in claim 4, characterized in that, The aperture of the small hole end ranges from 3 to 10 μm.

17. The atomizer as described in claim 15, characterized in that, Also includes: An end cap is connected to the pressure cover. The end cap has a mist outlet channel communicating with the second through hole. The mist outlet channel avoids the central area of ​​the microporous plate.

18. An electronic atomizing device, characterized in that, It includes a power supply assembly and an atomizer as described in any one of claims 1 to 17, wherein the power supply assembly is used to provide electrical power to the atomizer.

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