WO2022151904A1

WO2022151904A1 - Piezoelectric ceramic plate and electronic atomization device

Info

Publication number: WO2022151904A1
Application number: PCT/CN2021/138607
Authority: WO
Inventors: 周宏明; 郝边磊; 彭策; 肖建新; 廖朝兴
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2021-01-18
Filing date: 2021-12-16
Publication date: 2022-07-21
Also published as: CN216135171U

Abstract

A piezoelectric ceramic plate (20) and an electronic atomization device (10). The piezoelectric ceramic plate (20) comprises an atomization portion (100) and a piezoelectric vibration portion (200) which are integrally formed, wherein the piezoelectric vibration portion (200) is arranged surrounding the atomization portion (100); and the atomization portion (100) is provided with several micropores (130) penetrating the atomization portion (100) in the thickness direction of the atomization portion (100).

Description

Piezoelectric ceramic sheet and electronic atomization device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application filed on January 18, 2021 with the application number 202120127485.6 and the invention titled "piezoelectric ceramic sheet and electronic atomization device", the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the technical field of atomization, and in particular, to a piezoelectric ceramic sheet and an electronic atomization device including the piezoelectric ceramic sheet.

technical background

The medical micro-grid piezoelectric ceramic sheet is an important medical device in the field of medical atomization. Compared with the traditional ultrasonic piezoelectric ceramic sheet and the compressed air piezoelectric ceramic sheet, it has a high proportion of effective atomized drug particles and a smaller volume, which is easy to carry around. It has many advantages such as use, low noise, less residual liquid, and convenient and precise control of the dose, which can well meet people's growing demand for efficient and precise atomization. However, for the improved medical micro-grid piezoelectric ceramic sheet, it generally still has the defects of low energy utilization rate, cumbersome manufacturing process and easy damage. adversely affect chemical properties.

SUMMARY OF THE INVENTION

According to various exemplary embodiments of the present application, a piezoelectric ceramic sheet and an electronic atomization device including the piezoelectric ceramic sheet are provided.

A piezoelectric ceramic sheet, comprising an integrally formed atomizing part and a piezoelectric vibrating part, the piezoelectric vibrating part is arranged around the atomizing part, and the atomizing part is provided with a thickness along the thickness of the atomizing part. The direction runs through several micropores of the atomizing part.

In one of the embodiments, at different positions in the thickness direction of the atomizing portion, the diameters or widths of the micropores are different.

In one embodiment, the atomizing part has a liquid inlet surface and a spraying surface respectively located on opposite sides in the thickness direction thereof, and the atomization substrate enters the micropores from the liquid inlet surface and forms a For the liquid mist sprayed from the spray surface, the micropores communicate with the liquid inlet surface and the spray surface, and the diameter of the micropores decreases along the direction from the liquid inlet surface to the spray surface.

In one embodiment, each of the micro-holes is substantially conical and penetrates through the atomizing portion, and the diameter of each of the micro-holes gradually decreases along the direction from the liquid inlet surface to the spray surface. , and the aperture is the width of the micropore in the vertical thickness direction.

In one embodiment, the micropores are substantially spherical and communicate with each other to penetrate through the atomizing part, and along the direction from the liquid inlet surface to the spray surface, the pore size gradient of the micropores decreases, so The pore size is the diameter of the micropores.

In one of the embodiments, at least two gradient sections are set at different positions in the thickness direction of the atomizing part, and the micropores located in the same gradient section have approximately the same pore size and are directed to the In the direction of the spray surface, the diameters of the micropores located in different gradient sections gradually decrease.

In one of the embodiments, along the thickness direction of the atomizing portion, the diameter of each of the pores in the same gradient section first decreases and then increases.

In one embodiment, the boundary of each of the holes and micro-holes in the same gradient section is defined by the first ball table side wall surface and the second ball table side wall surface of the atomizing part, and the first ball table side wall The wall surface and the narrowest end of the side wall surface of the second table are connected to each other.

In one of the embodiments, the piezoelectric vibrating part has a first supporting surface and a second supporting surface arranged oppositely, the atomizing part has a liquid inlet surface and a spraying surface arranged oppositely, and the atomization substrate is provided from the inlet. The liquid surface enters the micropores and forms a liquid mist sprayed from the spray surface, the first support surface is arranged around the spray surface and is located on the first side of the piezoelectric ceramic sheet with the spray surface, the The first support surface is flush with the spray surface; the second support surface is arranged around the liquid inlet surface and is located on the second side of the piezoelectric ceramic sheet opposite to the first side with the liquid inlet surface. On both sides, the second support surface is flush with the liquid inlet surface.

In one embodiment, the spray surface is a spherical cap surface, so that the spray surface is protruded relative to the first supporting surface; the liquid inlet surface is a spherical cap surface, so that the liquid inlet surface is relatively The second support surface is recessed.

In one embodiment, the piezoelectric ceramic sheet is disc-shaped.

In one embodiment, the piezoelectric ceramic sheet has a thickness of 0.1 mm to 0.2 mm.

In one embodiment, the material of the atomizing portion is a ceramic material, and the material of the piezoelectric vibrating portion is a piezoelectric ceramic material.

In one of the embodiments, an electrode body and the piezoelectric ceramic sheet according to any one of the above embodiments are included, and the electrode body is provided on the piezoelectric vibrating part.

A technical effect of an embodiment of the present application is that since the piezoelectric ceramic sheet includes an integrally formed atomizing part and a piezoelectric vibrating part, the entire piezoelectric ceramic sheet has an integrally formed structure, avoiding the use of piezoelectric ceramic sheets and The microporous metal sheet is attached to the split connection structure by glue. On the one hand, the high-frequency vibration energy on the piezoelectric ceramic sheet does not need to be transmitted to other components to atomize the atomized matrix, thereby eliminating the loss of high-frequency vibration energy during the transmission process, improving the utilization rate of high-frequency vibration energy, and making the piezoelectric The ceramic sheet can atomize more atomized substrates per unit time, thereby improving the atomization performance of the piezoelectric ceramic sheet. On the other hand, it can eliminate the connection strength and compatibility problems between parts made of different materials, ensure that the piezoelectric ceramic sheet has sufficient mechanical strength, and improve the service life of the piezoelectric ceramic sheet. On the other hand, the structure of the piezoelectric ceramic sheet can be simplified and the manufacturing cost thereof can be reduced. At the same time, the thickness and weight of the piezoelectric ceramic sheet can be reduced, and the light and thin design of the piezoelectric ceramic sheet can be better realized.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the traditional technology, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the traditional technology. Obviously, the drawings in the following description are only the For some embodiments of the application, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic cross-sectional structural diagram of a piezoelectric ceramic sheet provided in a first embodiment;

FIG. 2 is a schematic top view of the piezoelectric ceramic sheet shown in FIG. 1;

3 is a schematic cross-sectional structural diagram of a piezoelectric ceramic sheet provided in a second embodiment;

4 is a schematic cross-sectional structural diagram of a piezoelectric ceramic sheet provided by a third embodiment; and

FIG. 5 is a schematic diagram of the connection structure between the side wall surface of the first ball table and the side wall surface of the second ball table in the piezoelectric ceramic sheet shown in FIG. 4 .

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Referring to FIGS. 1 and 2 , the electronic atomizing device 10 provided by the present application includes a piezoelectric ceramic sheet 20 and an electrode body, and the piezoelectric ceramic sheet 20 includes an atomizing portion 100 and a piezoelectric vibrating portion 200 arranged around the atomizing portion 100 , Both the atomizing part 100 and the piezoelectric vibrating part 200 are integrally formed. The atomizing portion 100 is provided with a plurality of micro-holes 130 , and the micro-holes 130 penetrate the entire atomizing portion 100 along the thickness direction, so that the entire atomizing portion 100 has a mesh-like structure. Liquid atomization substrates such as oil liquid and chemical liquid in the micropores 130 can be atomized to form a liquid mist containing tiny liquid droplets. Along the thickness direction of the atomizing part 100 , the diameter of the same micropore 130 varies. The piezoelectric ceramic sheet 20 atomizes the liquid atomized substrate by generating high-frequency vibration mechanical energy, rather than the traditional way of generating thermal energy by heating. The vibration frequency of the piezoelectric ceramic sheet 20 may correspond to the vibration frequency of ultrasonic waves. The material of the atomizing part 100 can be a dense ceramic material, which does not have piezoelectric properties, and the material of the piezoelectric vibrating part 200 can be a piezoelectric ceramic material. Obviously, the piezoelectric ceramic material has piezoelectric characteristics.

In some embodiments, the entire piezoelectric ceramic sheet 20 can be in the shape of a disk, and of course, it can also be a rectangular sheet-like structure or the like. The atomizing part 100 has a spraying surface 110 and a liquid inlet surface 120, and the piezoelectric vibrating part 200 has a first supporting surface 210 and a second supporting surface 220. Taking the entire piezoelectric ceramic sheet 20 as a reference, the piezoelectric ceramic sheet 20 has a first side and a second side opposite to the first side, the first support surface 210 and the spray surface 110 are located on the first side at the same time, A supporting surface 210 is annular, the spraying surface 110 is circular, and the first supporting surface 210 is connected to the outer circumference of the spraying surface 110 , so that the first supporting surface 210 is arranged around the spraying surface 110 . The first support surface 210 may be flush with the spray surface 110 . The second support surface 220 and the liquid inlet surface 120 are located on the second side of the piezoelectric ceramic sheet 20 . The outer circumferences are connected so that the second support surface 220 is arranged around the liquid inlet surface 120 . The second support surface 220 may be flush with the liquid inlet surface 120 .

Referring to FIG. 3 , in some embodiments, the spray surface 110 may be a spherical cap surface, so that the spray surface 110 is protruded from the first support surface 210 . The liquid inlet surface 120 may also be a spherical cap surface, so that the liquid inlet surface 120 is recessed relative to the second support surface 220 . Both ends of the micro-hole 130 have openings on the liquid inlet surface 120 and the spray surface 110 respectively, that is, the two ends of the micro-hole 130 penetrate through the liquid inlet surface 120 and the spray surface 110 respectively. The atomized substrate is located on the side where the liquid inlet surface 120 is located, and the atomized substrate enters the inside of the micropore 130 through the liquid inlet surface 120. When the piezoelectric ceramic sheet 20 generates high-frequency vibration, the liquid in the micropore 130 will absorb the piezoelectric The vibration energy of the ceramic sheet 20 is atomized under the action of the vibration energy to form a liquid mist and sprayed from the spray surface 110 for the user to absorb.

In other words, the liquid inlet surface 120 corresponds to the spray surface 110 , and the two are arranged at intervals in the thickness direction of the entire piezoelectric ceramic sheet 20 and face oppositely. The first support surface 210 and the second support surface 220 correspond to each other, and they are also arranged at intervals in the thickness direction of the entire piezoelectric ceramic sheet 20 and face oppositely. By setting both the spray surface 110 and the liquid inlet surface 120 to be circular planes, the entire manufacturing process of the piezoelectric ceramic sheet 20 can be simplified, the processing efficiency of the piezoelectric ceramic sheet 20 can be improved, and the manufacturing cost thereof can be reduced. When both the spray surface 110 and the liquid inlet surface 120 are provided as spherical cap surfaces with curved surfaces, a plane perpendicular to the thickness direction of the piezoelectric ceramic sheet 20 is taken as the reference plane, although the atomizing part 100 with spherical cap surfaces and the flat plate The orthographic projections of the shaped atomizing portion 100 on the reference plane are equal, however, the atomizing portion 100 with a spherical cap can ensure that the liquid mist is sprayed in different directions and has a relatively large spray range, and at the same time, a relatively large spray range can be set. There are many micropores 130, so as to increase the concentration of liquid mist by increasing the atomization amount of the atomized substrate per unit time.

An electrode body may be disposed on the first support surface 210, and the piezoelectric ceramic sheet 20 is electrically connected to a power source through the electrode body. When the power supply supplies power to the piezoelectric ceramic sheet 20 through the electrode body, the piezoelectric ceramic sheet 20 converts the electrical energy into mechanical energy of high frequency vibration, thereby atomizing the liquid atomized substrate. Since the liquid atomized substrate is located on the side where the liquid inlet surface 120 and the second supporting surface 220 are located, that is, the second side of the piezoelectric ceramic sheet 20, and the electrode body is located on the first side of the piezoelectric ceramic sheet 20, so It can effectively prevent the electrode body located on the first side from contaminating the liquid medium located on the second side. In the case where the atomized substrate is a drug, the anti-pollution function of this setting will become particularly important.

Referring to FIG. 1 , in some embodiments, at different positions in the thickness direction of the atomizing portion 100 , the diameters of the micropores 130 are different and vary. When the cross-section of the micro-hole 130 is circular, the aperture of the micro-hole 130 is the diameter of the circle; when the cross-section of the micro-hole 130 is non-circular, the aperture of the micro-hole 130 is perpendicular to the thickness direction of the atomizing part 100 on the width. For example, the micro-holes 130 are substantially conical and penetrate the atomizing part 100 , and the diameter R of the same micro-holes 130 gradually decreases along the direction from the liquid inlet surface 120 to the spray surface 110 . Therefore, when the atomized substrate flows from the liquid inlet surface 120 to the spray surface 110 through the micropores 130 under the action of the vibration energy of the piezoelectric ceramic sheet 20, the atomized substrate will produce a Venturi effect in the micropores 130, that is, the atomized substrate The size of the flow section through which it flows is gradually reduced, so that the flow rate of the atomized substrate is gradually increased. Therefore, when the flow rate increases, it is more favorable for the atomization substrate to be rapidly atomized to form a liquid mist with smaller droplet particles, so that the size of the droplet particles is more uniform, thereby improving the atomization performance of the piezoelectric ceramic sheet 20 .

Referring to FIGS. 4 and 5 , in some embodiments, the micropores 130 are substantially spherical and penetrate the atomizing part 100 , and the pore size gradient of the micropores 130 decreases along the direction from the liquid inlet surface 120 to the spray surface 110 . The atomizing part 10 is provided with at least two gradient sections at different positions in the thickness direction. The apertures of each micropore 130 located in the same gradient section are approximately the same. The aperture of 130 gradually decreases. In this embodiment, the atomizing portion 10 may be provided with a first gradient section 131 and a second gradient section 132. Along the thickness direction of the atomizing portion 100, the pore size of the same micropore 130 in the first gradient section 131 decreases first and then Increment. Specifically, the part of the micro-holes 130 located in the first gradient section 131 is bounded by the first ball table side wall surface 131 a and the second ball table side wall surface 131 b within the atomizing part 100 , and the first ball table side wall surface 131 a can be understood as a The side surface of the ball table body, the second table side wall surface 131b can be understood as the side surface of another ball table body. The first table side wall surface 131a has a first end with the smallest cross-sectional size, the second table side wall surface 131b has a second end with the smallest cross-sectional size, and the first end and the second end are connected to each other. Generally speaking, the narrowest ends of the first table side wall surface 131a and the second table side wall surface 131b are connected to each other. When the atomized substrate flows through the first gradient section 131, the Venturi effect can also be generated in the first gradient section 131, so that the atomized substrate is rapidly atomized to form a liquid mist, ensuring that the particles of the liquid droplets in the liquid mist are smaller Moreover, the size is more uniform, and the atomization performance of the piezoelectric ceramic sheet 20 can also be improved.

The shape of the same micropore 130 in the second gradient section 132 may be similar to the shape in the first gradient section 131 , and the average pore diameter of the micropores 130 in the second gradient section 132 is smaller than the average pore diameter in the first gradient section 131 . The part of the micropores 130 located in the second gradient segment 132 can be understood as being reduced by a certain proportion from the part located in the first gradient segment 131 . Along the thickness direction of the atomizing part 100 , the pore diameters of the same micropores 130 located in the second gradient section 132 also decrease first and then increase. The second gradient section 132 is closer to the spray surface 110 than the first gradient section 131 , and the first gradient section 131 is closer to the liquid inlet surface 120 than the second gradient section 132 . The atomized matrix can also produce the Venturi effect in the second gradient section 132, and, in general, since the average pore size of the micropores 130 in the second gradient section 132 is smaller than the average pore size in the first gradient section 131, in the atomization During the process of entering the matrix from the first gradient section 131 into the second gradient section 132 , the atomized matrix will also produce a Venturi effect, thereby further improving the atomization performance of the piezoelectric ceramic sheet 20 .

In some embodiments, the processing of the piezoelectric ceramic sheet 20 may roughly include the following main steps.

The ceramic slurry is poured into the annular cavity of the mold, and the ceramic slurry is pressed by relatively low pressure to form the edge blank of the piezoelectric vibration part 200 . Obviously, the edge blank encloses a central hole.

The ceramic slurry is injected into the circular cavity of another mold, and then pore former particles, which can be spherical or cylindrical, are added to the ceramic slurry. Of course, the size of the pore former particles must be distributed in a gradient. For example, relatively large pore former particles are called closer to the bottom of the cavity, while relatively small pore former particles are closer to the top of the cavity, i.e. from the top to the bottom of the cavity, the The size gradually increases. The ceramic slurry mixed with the pore-forming agent particles is then pressed with a relatively small pressure to form the central body of the atomizing part 100 . The diameter of the center blank is adapted to the diameter of the center hole of the edge blank, so that the center blank can be subsequently accommodated in the center hole.

The center blank is accommodated in the center hole of the edge blank. When the center blank and the edge blank have unequal heights, the relative protruding parts of the center blank or edge blank can be cut off to ensure that the center blank The end surfaces of the body and the edge blank are flush with each other. Then, the edge blank containing the center blank is put into a mold for pressing with a relatively large pressure, so that the center blank and the edge blank are initially integrally connected to form a piezoelectric ceramic blank.

Heating the piezoelectric ceramic body, when the piezoelectric ceramic body is heated to the set temperature and kept for a certain period of time, the pore-forming agent particles can be decomposed or exerted at this temperature, thereby forming voids in the center body, that is, the The entire piezoelectric ceramic body is debonded. Of course, when the size of the pore-forming agent particles is larger, the volatilized pore-forming agent particles will form larger voids in the central body. On the contrary, when the size of the pore-forming agent particles is smaller, the volatilized pore-forming agent particles will The agent particles will form smaller voids within the center body. Therefore, based on the distribution law of the pore-forming agent particles in the central body, after the pore-forming agent particles are all volatilized, the voids inside the central body will be connected to form several different micropores 130, and the micropores 130 will penetrate the entire central body. , and the diameter of the micropores 130 increases or decreases along the thickness direction of the central blank.

The piezoelectric ceramic body with the micropores 130 is sintered at a temperature in the range of 900° C. to 1200° C., thereby converting the piezoelectric ceramic body with the micropores 130 into the finished piezoelectric ceramic sheet 20 . Obviously, the sintering temperature will be significantly higher than the above-mentioned temperature during debinding, the edge blank will be transformed into the piezoelectric vibrating portion 200 of the piezoelectric ceramic sheet 20 , and the central blank will be transformed into the atomized portion 100 of the piezoelectric ceramic sheet 20 . . It can be understood that, theoretically, within the same gradient section, micropores 130 with the same pore size can be formed by using pore-forming agent particles of the same size. However, the size of the pore-forming agent particles cannot be guaranteed to be completely consistent during actual processing. Pore-forming agent particles with similar sizes can be selected as far as possible to create pores in the same gradient section, so that the final formed micropores 130 have the same pore size in the same gradient section. roughly the same.

Considering that the atomizing part 100 contains a large number of micropores 130 , the micropores 130 will affect the fatigue resistance of the atomizing part 100 to a certain extent. In order to prevent fatigue fracture of the atomizing part 100 under the action of high-frequency vibration and improve the service life of the entire piezoelectric ceramic sheet 20, in the step of adding pore-forming agent particles to the ceramic slurry, it is also possible to add pore-forming agent particles to the ceramic slurry. Adding toughened fibers can effectively improve the mechanical strength of the atomized part 100 after molding through the strengthening and connection of the toughened fibers, thereby ensuring the service life and atomization performance of the piezoelectric ceramic sheet 20 .

Of course, the pore-forming agent particles can also be selected to have a higher melting point and be soluble in water, acid solution, alkali solution or inorganic salt solution. In this case, the adhesive removal process in the above-mentioned manufacturing process of the piezoelectric ceramic sheet 20 can be omitted. In view of the high melting point of the pore-forming agent particles, the pore-forming agent particles cannot be decomposed or volatilized during the sintering process of the piezoelectric ceramic body to form the micropores 130 on the central body. After the body is sintered at a temperature in the range of 900°C to 1200°C, a further processing step can be set, that is, the sintered piezoelectric ceramic body is put into a dissolving matrix such as water, acid solution, alkali solution or inorganic salt solution, etc. The pore-forming agent particles that are not decomposed or volatilized during the sintering process are dissolved in the above-mentioned dissolution matrix, so that the dissolved pore-forming agent particles form a large number of micropores 130 in the sintered piezoelectric ceramic body, and finally the sintered pore-forming agent particles are formed. The resulting piezoelectric ceramic body is transformed into a finished piezoelectric ceramic sheet 20 .

Since the piezoelectric ceramic sheet 20 includes the atomizing part 100 and the piezoelectric vibrating part 200 which are integrally formed, the entire piezoelectric ceramic sheet 20 is integrally formed, avoiding the use of the piezoelectric ceramic sheet 20 and the metal sheet with the micro-holes 130 The split connection structure attached by glue. The working principle of the piezoelectric ceramic sheet 20 of the traditional split connection structure is to transmit the high-frequency vibration energy of the piezoelectric ceramic sheet 20 to the metal sheet, so that the metal sheet generates high-frequency vibration, and then enters the micro-holes 130 of the metal sheet. The atomized substrate is atomized to form a liquid mist.

When the piezoelectric ceramic sheet 20 adopts a split connection structure, it is difficult to ensure the uniformity of the glue application, so that the piezoelectric ceramic sheet 20 and the metal sheet cannot be closely attached, and then the piezoelectric ceramic sheet 20 and the metal sheet cannot be closely attached. There are a lot of gaps between them, so that part of the high-frequency vibration energy of the piezoelectric ceramic sheet 20 cannot be transmitted to the metal sheet through the gap, that is, there is a lot of loss in the high-frequency vibration energy of the piezoelectric ceramic sheet 20 during the transmission process, thereby reducing the pressure. The utilization rate of the high-frequency vibration energy of the piezoelectric ceramic sheet 20 reduces the atomization amount of the atomized matrix by the metal sheet in a unit time, and finally constitutes a weakening effect on the atomization performance of the entire piezoelectric ceramic sheet 20 . Second, even if the uniformity of smearing can be ensured through complex processing technology, the piezoelectric ceramic sheet 20 and the metal sheet are closely attached to eliminate the gap between them. However, in the process that the high-frequency vibration energy of the piezoelectric ceramic sheet 20 is transmitted to the metal sheet through the adhesive layer formed by the curing of the glue, the adhesive layer can absorb part of the high-frequency vibration energy of the piezoelectric ceramic sheet 20, which also makes the The high-frequency vibration energy of the piezoelectric ceramic sheet 20 is lost during the transmission process, which reduces the utilization rate, and eventually leads to a reduction in the atomization amount of the metal sheet to the atomized substrate, thereby weakening the atomization performance of the piezoelectric ceramic sheet 20 . The third is that the micro-holes 130 on the metal sheet are formed by a top-to-bottom (ie from outside to inside) punching method, and the punching method can be laser punching or the like. However, this punching method has very strict requirements on the material of the metal sheet, and the process is cumbersome, and it is difficult to ensure the forming accuracy of the micro-holes 130, that is, the quality control of the entire piezoelectric ceramic sheet 20 is difficult to grasp, which will make some micro-holes 130 difficult to control. The size of the hole 130 can weaken or even lose the atomization function of the atomization substrate because the size of the hole 130 cannot meet the design requirements, and also affects the atomization performance of the piezoelectric ceramic sheet 20 . Fourth, the entire piezoelectric ceramic sheet 20 also includes a metal sheet, an adhesive layer and a piezoelectric ceramic sheet 20 that are stacked in sequence with each other, making it difficult to effectively reduce the thickness and weight of the piezoelectric ceramic sheet 20, and ultimately unable to realize the piezoelectric ceramic sheet 20. thin and light design.

However, the piezoelectric ceramic sheet 20 in the above-mentioned embodiment of the present application adopts the structure in which the atomizing part 100 and the piezoelectric vibrating part 200 are integrally formed, which can eliminate the arrangement of the adhesive layer and the metal sheet, so that at least the following beneficial effects will be formed: 1. It is because the high-frequency vibration energy on the piezoelectric ceramic sheet 20 does not need to be transmitted to other components to atomize the atomizing matrix, which can ensure that all the high-frequency vibration energy on the piezoelectric ceramic sheet 20 is used to atomize the micropores 130. The substrate is atomized, thereby eliminating the loss of high-frequency vibration energy in the transmission process, improving the utilization rate of high-frequency vibration energy, so that the piezoelectric ceramic sheet 20 can atomize more atomized substrates per unit time, thereby increasing the pressure. Atomization performance of the electroceramic sheet 20 . The second is to eliminate the problem of connection strength and compatibility between parts made of different materials, to ensure that the piezoelectric ceramic sheet 20 has sufficient mechanical strength, and to improve the service life of the piezoelectric ceramic sheet 20 . In addition, there are a large number of toughened fibers in the atomizing part 100 , which can offset the weakening effect of the micropores 130 on the structural strength to a great extent, and further ensure the structural strength and service life of the piezoelectric ceramic sheet 20 . Third, the micropores 130 are formed by the volatilization or dissolution of the pore-forming agent particles, so the micropores 130 are formed in a bottom-up (ie, from inside to outside) manner, which can simplify the forming process of the micropores 130 and improve the piezoelectric ceramics. The processing efficiency of the sheet 20 is improved and the manufacturing cost thereof is reduced. At the same time, the size of the micropores 130 is determined by the size of the pore-forming agent particles themselves, so that the forming accuracy of the micropores 130 can be ensured, the aperture of the micropores 130 can meet the design requirements, and the micropores 130 can effectively mist the atomized substrate. to ensure the atomization performance of the piezoelectric ceramic sheet 20. Fourth, the arrangement of parts such as metal sheets and adhesive layers can be eliminated, the structure of the piezoelectric ceramic sheet 20 can be simplified, and the manufacturing cost thereof can be reduced. At the same time, the thickness and weight of the piezoelectric ceramic sheet 20 can be reduced, so as to better realize the light and thin design of the piezoelectric ceramic sheet 20 .

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims

A piezoelectric ceramic sheet, comprising an integrally formed atomizing part and a piezoelectric vibrating part, the piezoelectric vibrating part is arranged around the atomizing part, and the atomizing part is provided with a thickness along the thickness of the atomizing part. The direction runs through several micropores of the atomizing part.
The piezoelectric ceramic sheet according to claim 1, wherein the diameters or widths of the micropores are different at different positions in the thickness direction of the atomized portion.
The piezoelectric ceramic sheet according to claim 2, wherein the atomizing portion has a liquid inlet surface and a spraying surface respectively located on opposite sides in the thickness direction thereof, and the atomized substrate enters the liquid inlet surface from the liquid inlet surface. The micropores form a liquid mist ejected from the spray surface, the micropores communicate with the liquid inlet surface and the spray surface, and the micropores are directed in the direction of the liquid inlet surface to the spray surface. The pore size is reduced.
The piezoelectric ceramic sheet according to claim 3, wherein each of the micro-holes is substantially conical and penetrates through the atomizing portion, along a direction from the liquid inlet surface to the spraying surface, each of the The pore diameter of the micropore gradually decreases, and the pore diameter is the width of the micropore in the vertical thickness direction.
The piezoelectric ceramic sheet according to claim 3, wherein the micropores are substantially spherical and communicate with each other to penetrate through the atomizing part, and the micropores are in a direction in which the liquid inlet surface points to the spraying surface. The pore size gradient decreases, the pore size is the diameter of the micropores.
The piezoelectric ceramic sheet according to claim 5, wherein at least two gradient sections are arranged at different positions in the thickness direction of the atomizing part, and the diameters of the micropores located in the same gradient section are approximately the same, In the direction in which the liquid inlet surface points to the spray surface, the diameters of the micropores located in different gradient sections gradually decrease.
The piezoelectric ceramic sheet according to claim 6, wherein, along the thickness direction of the atomizing portion, the diameter of each of the pores in the same gradient section first decreases and then increases.
The piezoelectric ceramic sheet according to claim 6, wherein the boundary of each of the micro-holes in the same gradient section is defined by the first ball table side wall surface and the second ball table side wall surface of the atomizing part , the narrowest ends of the side wall surface of the first ball table and the side wall surface of the second ball table are connected to each other.
The piezoelectric ceramic sheet according to claim 1, wherein the piezoelectric vibrating part has a first supporting surface and a second supporting surface arranged oppositely, and the atomizing part has a liquid inlet surface and a spraying surface arranged oppositely, The atomized substrate enters the micropores from the liquid inlet surface and forms a liquid mist sprayed from the spray surface, and the first support surface is arranged around the spray surface and is located on the piezoelectric ceramic sheet with the spray surface. On the first side of the device, the first support surface is flush with the spray surface; the second support surface is arranged around the liquid inlet surface and is located between the piezoelectric ceramic sheet and the liquid inlet surface. On the second side opposite to the first side, the second support surface is flush with the liquid inlet surface.
The piezoelectric ceramic sheet according to claim 9, wherein the spray surface is a spherical cap surface, so that the spray surface is protruded from the first supporting surface; the liquid inlet surface is a spherical cap surface, so that The liquid inlet surface is recessed relative to the second support surface.
The piezoelectric ceramic sheet according to claim 1, wherein the piezoelectric ceramic sheet has a disc shape.
The piezoelectric ceramic sheet according to claim 1, wherein the piezoelectric ceramic sheet has a thickness of 0.1 mm to 0.2 mm.
The piezoelectric ceramic sheet according to claim 1, wherein the material of the atomizing portion is a ceramic material, and the material of the piezoelectric vibrating portion is a piezoelectric ceramic material.
An electronic atomization device comprising an electrode body and the piezoelectric ceramic sheet according to any one of claims 1 to 13, wherein the electrode body is provided on the piezoelectric vibrating part.