Atomization chip, atomizer and electronic atomization device

Abstract

The invention relates to an atomization chip, an atomizer and an electronic atomization device, and the atomization chip comprises a piezoelectric substrate, a first electrode and a second electrode. The piezoelectric substrate is provided with a first surface and a second surface which are opposite to each other, the first surface is provided with a first area and a second area surrounding the first area, and the second surface is provided with a third area and a fourth area surrounding the third area. The first electrode is arranged in the first area. The first electrode is arranged in the first area, the second electrode is arranged in the third area, a certain gap exists between the edge of the first electrode and the edge of the piezoelectric substrate and between the edge of the second electrode and the edge of the piezoelectric substrate, and when the atomization chip works, the gap cannot conduct electricity, so that the edge breakage rate of the atomization chip can be reduced, and the service life of the electronic atomization device can be prolonged.

Description

Technical Field

[0001] The present application relates to the field of electronic atomization technology, and in particular to an atomization chip, an atomizer and an electronic atomization device. Background Art

[0002] An electronic atomization device generally includes an atomizer and a power supply assembly. The atomizer is used to store and atomize the aerosol-generating matrix, and the power supply assembly is used to provide electrical energy for the operation of the atomizer.

[0003] In the field of ultrasonic atomization, the atomization chip is the main component of ultrasonic atomization. During the manufacturing process, the atomization chip is usually cut into chip units by a knife wheel dicing machine, and the chip edge is prone to chip collapse (front chip collapse, back chip collapse, corner drop and cracks, etc.). When a chip with chip collapse is driven by high-power AC, the piezoelectricity, inverse piezoelectricity, and thermoelectricity of the piezoelectric substrate will cause stress and charge concentration in the chip collapse area, and eventually cause the chip to crack, which ultimately leads to a short service life of the electronic atomization device. Summary of the invention

[0004] Based on this, it is necessary to provide an atomization chip, an atomizer and an electronic atomization device to address the above problems, so as to at least improve one of the above problems.

[0005] In a first aspect, the present application provides an atomization chip, comprising: a piezoelectric substrate, a first electrode, and a second electrode. The piezoelectric substrate has a first surface and a second surface opposite to each other, the first surface has a first area and a second area surrounding the first area, and the second surface has a third area and a fourth area surrounding the third area. The first electrode is disposed in the first area. The second electrode is disposed in the third area.

[0006] In one embodiment, the first electrode and / or the second electrode is a pattern electrode.

[0007] In one embodiment, the pattern shape of the first electrode and / or the second electrode is a rhombus, a trapezoid, a cross, a missing-corner rectangle or an octagon.

[0008] In one of the embodiments, the pattern shape of the first electrode and / or the second electrode is teardrop-shaped, string-shaped, crescent-shaped, starburst-shaped, octagonal-shaped, cloud-shaped, lightning-shaped, or heart-shaped.

[0009] In one embodiment, the pattern shape of the first electrode and / or the second electrode is a reciprocating bending structure.

[0010] In one embodiment, the pattern shape of the first electrode and / or the second electrode is an interdigitated structure.

[0011] In one embodiment, the thickness of the first electrode and / or the second electrode is 10 nm-3000 nm.

[0012] In one embodiment, the piezoelectric substrate includes at least one of lithium niobate, lithium tantalate, quartz, sodium potassium niobate, polyvinylidene fluoride, and aluminum nitride.

[0013] In one embodiment, the thickness of the piezoelectric substrate is 0.1 mm-2 mm.

[0014] In one embodiment, the first electrode and / or the second electrode is made of at least one of gold, silver, aluminum, chromium, titanium, stainless steel, and graphite.

[0015] In a second aspect, the embodiment of the present application further provides an atomizer, comprising: a housing and an atomizer chip as described above. The housing has an air inlet and an air outlet, and the interior of the housing forms an oil tank, an atomization chamber, an air inlet channel, and an air flow channel; the oil tank has a smoke oil channel, and the smoke oil channel is connected to the atomization chamber, one end of the air inlet channel is connected to the atomization chamber, and the other end is connected to the air inlet, one end of the air flow channel is connected to the atomization chamber, and the other end is connected to the air outlet. The atomizer chip is arranged in the atomization chamber and is arranged corresponding to the smoke oil channel; the first electrode and the second electrode of the atomizer chip are used to connect to a power source.

[0016] In one of the embodiments, the atomizer further includes: an oil guide block, which is disposed at the connection between the smoke oil channel and the atomization chamber and corresponds to the atomization chip.

[0017] In one embodiment, the atomizer further includes: a chip holder, the chip holder is arranged in the atomization chamber, and the atomization chip is arranged on the chip holder.

[0018] In one embodiment, the first electrode is disposed corresponding to the e-liquid channel, and the first electrode is a pattern electrode.

[0019] In a third aspect, an embodiment of the present application also provides an electronic atomization device, comprising: a nozzle, an atomizer base, a power supply assembly and an atomizer as described above, wherein the nozzle is connected to the air outlet, the atomizer is arranged on the atomizer base, the atomizer base has an air inlet hole, the air inlet hole is connected to the air inlet, and the power supply assembly is electrically connected to the atomization chip of the atomizer.

[0020] The above-mentioned atomizer chip is provided with a structure of a second electrode, a piezoelectric substrate and a first electrode stacked in sequence, wherein a first area and a second area surrounding the first area are provided on the first surface of the piezoelectric substrate, and a third area and a fourth area surrounding the third area are provided on the surface of the piezoelectric substrate opposite to the first surface, the first electrode is provided in the first area, and the second electrode is provided in the third area, so that there is a certain gap between the edges of the first electrode and the second electrode and the edge of the piezoelectric substrate, and when the atomizer chip is working, the above-mentioned gap will not be conductive, thereby reducing the edge collapse rate of the atomizer chip. The atomizer applied to the above-mentioned atomizer chip can increase the service life of the atomizer by providing the above-mentioned atomizer chip. The electronic atomizer device applied to the above-mentioned atomizer can increase the service life of the electronic atomizer device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of an electronic atomization device provided in an embodiment of the present application.

[0022] Figure 2 A cross-sectional view of an atomizer provided in an embodiment of the present application.

[0023] Figure 3 A cross-sectional view of another atomizer provided in an embodiment of the present application.

[0024] Figure 4 A schematic structural diagram of the first surface of an atomization chip provided in an embodiment of the present application.

[0025] Figure 5 A schematic structural diagram of the first surface of another atomization chip provided in an embodiment of the present application.

[0026] Figure 6 This is a schematic structural diagram of the first surface of another atomization chip provided in an embodiment of the present application.

[0027] Figure 7 A schematic diagram of the structure of the second surface of an atomization chip provided in an embodiment of the present application.

[0028] Figure numerals: electronic atomization device 1, atomizer 10, atomization chip 100, piezoelectric substrate 110, first surface 111, first area 1111, second area 1112, second surface 112, third area 1121, fourth area 1122, first electrode 120, first part 121, second part 122, third part 123, fourth part 124, fifth part 125, sixth part 126, second electrode 130, shell 200, air inlet 210, air outlet 220, oil tank 230, smoke oil channel 231, atomization chamber 240, air inlet channel 250, air flow channel 260, oil guide block 300, chip bracket 400, nozzle 20, atomizer base 30, air inlet hole 310, connector 500, power supply assembly 40. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] In the field of ultrasonic atomization, the atomization chip is the main component of ultrasonic atomization. During the manufacturing process, the atomization chip is usually cut into chip units by a knife wheel dicing machine, and the chip edge is prone to chip collapse (front chip collapse, back chip collapse, corner drop and cracks, etc.). When a chip with chip collapse is driven by high-power AC, the piezoelectricity, inverse piezoelectricity, and thermoelectricity of the piezoelectric substrate will cause stress and charge concentration in the chip collapse area, and eventually cause the chip to crack, which ultimately leads to a short service life of the electronic atomization device.

[0036] Based on the above problems, the present application provides an electronic atomization device 1 to solve the above problems. Figure 1 , Figure 1The schematic diagram of the structure of an electronic atomization device 1 provided in an embodiment of the present application is shown. The electronic atomization device 1 may include: an atomizer 10, a nozzle 20, an atomizer base 30, and a power supply assembly 40. The nozzle 20 may be arranged at one end of the atomizer 10 for the user to inhale the aerosol, the atomizer 10 may be arranged at the atomizer base 30, the power supply assembly 40 may be arranged at a side of the atomizer base 30 away from the atomizer 10, and the atomizer 10 may be electrically connected to the power supply assembly 40.

[0037] Please also see Figure 2 The atomizer 10 may include a housing 200 and an atomizer chip 100. The housing 200 may be used to protect the components disposed in the housing 200. The housing 200 forms an atomizer cavity 240. The atomizer chip 100 may be disposed in the atomizer cavity 240. The atomizer chip 100 may be used to process an aerosol generating substrate to generate an aerosol.

[0038] Please also see Figure 3 and Figure 4 The atomization chip 100 may include: a piezoelectric substrate 110 , a first electrode 120 and a second electrode 130 .

[0039] In this embodiment, when the piezoelectric substrate 110 is subjected to pressure, a voltage will appear between the two end surfaces. The piezoelectric substrate 110 can be a sheet structure, specifically a rectangular sheet structure, which can improve the structural stability of the piezoelectric substrate 110.

[0040] In an embodiment of the present application, the first electrode 120 and / or the second electrode 130 is a pattern electrode, that is, the first electrode 120 and / or the second electrode 130 has a certain pattern shape. Since the surface of the pattern shape has an undulating structure, this can be more conducive to the aerosol generating matrix to form a larger and more stable liquid film on the pattern shape, thereby helping to improve the atomization efficiency of the aerosol generating matrix.

[0041] Please also refer to Figure 3 , Figure 5 and Figure 6 The present embodiment does not limit the projection shape and size of the piezoelectric substrate 110, the first electrode 120 and / or the second electrode 130. For example, the projection shape and size of the piezoelectric substrate 110, the first electrode 120 and / or the second electrode 130 may be 1 mm in area. 2 -500mm 2 Squares with a diameter of 1mm-50mm, circles with a diameter of 1mm-50mm, triangles with a side length of 1mm-50mm, other polygons with a side length of 0.5mm-50mm, such as rhombuses, trapezoids, crosses, corner-less rectangles, octagons, etc. In addition to the regular shapes mentioned above, it can also be a 1mm 2 -500mm 2Irregular shapes such as teardrop, string, crescent, explosion, octagon, cloud, lightning, heart, etc.

[0042] For details, please refer to Figure 3 In the present embodiment, the projection shape of the piezoelectric substrate 110 is a rectangle, the pattern shape of the first electrode 120 may be a forked finger structure, the first electrode 120 may include a first portion 121 and a second portion 122, the first portion 121 and the second portion 122 may both be strip-shaped, the second portion 122 may be arranged perpendicular to the first portion 121, and a plurality of second portions 122 may be arranged, the plurality of second portions 122 are all located on one side of the first portion 121, the plurality of second portions 122 are arranged at intervals and are evenly distributed on one side of the first portion 121 to form a finger structure, and the first electrode 120 may be formed by crossing two of the above-mentioned finger structures to form a forked finger structure.

[0043] Figure 5 Another form of the first electrode 120 is shown. Figure 5 , the projection shape of the piezoelectric substrate 110 is also a rectangle, the pattern shape of the first electrode 120 can be a reciprocating bending structure, the first electrode 120 can include a third part 123 and a fourth part 123, the third part 123 can be provided in multiple and parallel configurations, and the fourth part 124 is connected to the end of the same end of the adjacent third part 123, for example, the fourth part 123 can be connected to. Among them, the fourth part 124 can be a strip structure, and the third part 12 can be a strip structure with serrations, so as to form a Figure 5 The reciprocating bending structure shown in .

[0044] Figure 6 Another form of the first electrode 120 is shown. Figure 6 The projection shape of the piezoelectric substrate 110 is also a rectangle. The pattern shape of the first electrode 120 can be two gate-like structures spliced ​​together. The first electrode 120 can include a fifth portion 125 and a sixth portion 126. The structure of the fifth portion 125 can be the same as that of the sixth portion 126. Taking the structure of the fifth portion 125 as an example, the fifth portion 125 can be an arched structure after removing a semicircle from a long side of the rectangle. The complete long sides of the fifth portion 125 and the sixth portion 126 can be arranged relative to each other to form Figure 6 Shown are two door-like structures joined together.

[0045] The aerosol generating matrix can be combined with the surface of the first electrode 120 and can be distributed in the pattern portion of the surface of the first electrode 120, so that the aerosol generating matrix forms a larger and more stable liquid film on the surface of the first electrode 120, thereby helping to improve the atomization efficiency of the aerosol generating matrix.

[0046] Since a key limiting factor in the efficiency of atomization in the field of ultrasonic atomization is the choice of materials used, lead zirconate titanate is currently commonly used, but this is a hysteresis material that is easily heated and contaminated by the element lead at the boundaries between grains. The mechanical and electronic properties of grain size and grain boundaries also limit the frequency at which lead zirconate titanate can work. In contrast, lithium niobate is lead-free and hysteresis-free, and can be used to atomize fluids, which is one order of magnitude more efficient than commercial atomizers. The traditional cutting of lithium niobate for operation in thickness mode is 36-degree Y-rotation cutting, but the 128-degree Y-rotation X-propagation cutting (128°YX) commonly used to generate surface acoustic waves has been shown to have a higher surface displacement amplitude when operating at resonance and low loss compared to the 36-degree cutting. In this embodiment, the piezoelectric substrate 110 can be made of a single crystal piezoelectric material, a polycrystalline piezoelectric material, a piezoelectric polymer, or a piezoelectric film. Specifically, the piezoelectric substrate 110 may include at least one of lithium niobate, lithium tantalate, quartz, sodium potassium niobate, polyvinylidene fluoride, and aluminum nitride.

[0047] Among them, lithium niobate, lithium tantalate and sodium potassium niobate have excellent piezoelectric properties, especially in high-frequency applications, and lithium niobate has a low thermal expansion coefficient and is suitable for high-temperature environments. At the same time, lithium niobate has high mechanical strength and is suitable for structural support, but lithium niobate, lithium tantalate and sodium potassium niobate have high costs and are easily affected by impurities and defects, resulting in performance degradation. Quartz is naturally occurring, so it has low cost, low thermal expansion coefficient, is suitable for high-temperature environments and has high mechanical strength, which is suitable for structural support, but the piezoelectric properties of quartz are relatively poor. Polyvinylidene fluoride has a low cost and good weather resistance and corrosion resistance, and high mechanical strength, but the piezoelectric properties of polyvinylidene fluoride are relatively poor and the high-temperature stability is limited. Aluminum nitride has good thermal stability and mechanical strength, and excellent piezoelectric properties, especially in high-frequency applications, and aluminum nitride has high electron mobility, but the cost of aluminum nitride is high and the high-temperature stability is limited. This application does not limit the specific material of the piezoelectric substrate 110, and it can be selected according to the actual use scenario. For example, in this embodiment, the piezoelectric substrate 110 can be made of lithium niobate. Since the contact angle of water on the surface of lithium niobate is twice that of water on the surface of gold, lithium niobate is more hydrophilic. The aerosol generating matrix can form a larger and more stable liquid film at this position, which in turn helps to atomize the aerosol generating matrix.

[0048] As mentioned above, please continue to refer to Figure 3 and Figure 4 The piezoelectric substrate 110 may have a first surface 111 and a second surface 112 opposite to each other. In this embodiment, the first surface 111 and the second surface 112 may both be rectangular. The first surface 111 has a first area 1111 and a second area 1112 surrounding the first area 1111 .

[0049] In one embodiment, the second area 1112 can be formed by the first surface 111 of the piezoelectric substrate 110, and the first area 1111 can be located inside the second area 1112, that is, there is a certain distance between the edge of the first area 1111 and the edge of the second area 1112, which can reduce the edge collapse rate of the atomization chip 100. The embodiment of the present application does not limit the above distance, and it can be set according to actual conditions.

[0050] In another embodiment, the second area 1112 may also be formed by a partial area of ​​the first surface 111 of the piezoelectric substrate 110. For example, the second area 1112 may be an annular area formed by indenting a certain width at each edge of the first surface 111, and the first area 1111 may be an area formed by indenting a certain width at each edge of the second area 1112. That is to say, a certain distance is set between the outer edge of the first area 1111 and the inner edge of the second area 1112. This can further reduce the edge collapse rate of the atomization chip 100. The embodiment of the present application does not limit the above distance, and it can be set according to actual conditions.

[0051] It should be noted that the second area 1112 can be a square frame area with equal width on each side, or a circular frame area with equal width at all locations. The embodiment of the present application does not impose specific restrictions on the structures of the first area 1111 and the second area. The first area 1111 can be a square area arranged in the second area 1112, or a circular area arranged in the second area 1112, etc. For example, the second area 1112 can be a circular frame structure, and the first area 1111 can be an inscribed square structure in the second area 1112, or the second area 1112 can be a square frame structure, and the first area 1111 can be an inscribed circular structure in the second area 1112, etc., and specific restrictions can be made according to actual conditions.

[0052] The second surface 112 has a third area 1121 and a fourth area 1122 surrounding the third area 1121 .

[0053] In one embodiment, the fourth region 1122 can be formed by the first surface 111 of the piezoelectric substrate 110, and the third region 1121 can be located inside the fourth region 1122, that is, there is a certain distance between the edge of the third region 1121 and the edge of the fourth region 1122, which can reduce the edge collapse rate of the atomization chip 100. The embodiment of the present application does not limit the above distance, and it can be set according to actual conditions.

[0054] In another embodiment, the fourth region 1122 may also be formed by a partial region of the first surface 111 of the piezoelectric substrate 110. For example, the fourth region 1122 may be an annular region formed by indenting a certain width at each edge of the first surface 111, and the third region 1121 may be a region formed by indenting a certain width at each edge of the fourth region 1122. That is to say, a certain distance is set between the outer edge of the third region 1121 and the inner edge of the fourth region 1122. This can further reduce the edge collapse rate of the atomizer chip 100. The embodiment of the present application does not limit the above distance, and it can be set specifically according to actual conditions.

[0055] It should be noted that the fourth area 1122 can be a square frame area with equal widths on all sides, or a circular frame area with equal widths at all locations. The embodiment of the present application does not impose specific restrictions on the structures of the third area 1121 and the second area. The third area 1121 can be a square area arranged in the fourth area 1122, or a circular area arranged in the fourth area 1122, etc. For example, the fourth area 1122 can be a circular frame structure, and the third area 1121 can be an inscribed square structure in the fourth area 1122, or the fourth area 1122 can be a square frame structure, and the third area 1121 can be an inscribed circular structure in the fourth area 1122, etc., and specific restrictions can be made according to actual conditions.

[0056] The first electrode 120 can be arranged in the first area 1111, and the second electrode 130 can be arranged in the third area 1121. It should be noted that the embodiment of the present application does not limit the arrangement of the first electrode 120 and the second electrode 130. For example, the first electrode 120 and the second electrode 130 can be plated on the piezoelectric substrate 110. When the first electrode 120 and the second electrode 130 are energized, the atomizer chip 100 can start working. It should be noted that in this embodiment, alternating current needs to be applied between the first electrode 120 and the second electrode 130, that is, the alternating current signal applied between the first electrode 120 and the second electrode 130 is an electrical signal that changes with time and the direction of the current changes. The electrical signal here includes but is not limited to sine waves, square waves, sawtooth waves and their radio frequency signals.

[0057] In this embodiment, the material and size of the first electrode 120 and the second electrode 130 are not limited. For example, the first electrode 120 and / or the second electrode 130 can be made of at least one of gold, silver, aluminum, chromium, titanium, stainless steel, graphite and the like, wherein gold and silver both have good electrical conductivity and chemical stability, which helps to ensure the stability and safety of the electrode. Aluminum is a light metal with good electrical conductivity, which can reduce the weight of the electrode and improve the electrical conductivity of the electrode. Chromium and stainless steel are metals with good corrosion resistance, which can improve the corrosion resistance of the electrode. Titanium is a light and corrosion-resistant metal that can reduce the weight of the electrode and improve the corrosion resistance of the electrode. Graphite is a very good conductive material that can improve the electrical conductivity of the electrode and has a low cost. The specific material to be used can be selected according to actual conditions.

[0058] The thickness of the first electrode 120 and / or the second electrode 130 can be any value between 10nm-3000nm. It is understood that if the thickness of the first electrode 120 and / or the second electrode 130 is too thin, it may lead to insufficient active sites, thereby affecting the electrocatalytic activity of the electrode. In addition, the area of ​​the electrode surface exposed to the electrolyte increases, which may cause the loss of active substances on the electrode surface and reduce the stability of the electrode. If the thickness of the first electrode 120 and / or the second electrode 130 is too thick, it may lead to a decrease in the density of active sites, thereby affecting the electrocatalytic activity of the electrode. At the same time, the area of ​​the electrode surface exposed to the electrolyte decreases, which may lead to insufficient active substances on the electrode surface and reduce the stability of the electrode.

[0059] In some specific embodiments, the first electrode 120 and / or the second electrode 130 may be a 20 nm thick chromium electrode, a 20 nm thick gold electrode, an 80 nm thick chromium electrode, an 80 nm thick gold electrode or a 1000 nm thick aluminum electrode.

[0060] The first electrode 120 and the second electrode 130 are arranged on the first surface 111 and the second surface 112 of the piezoelectric substrate 110, and an atomization chip 100 without an interdigital transducer can be formed. When an alternating current signal is applied to the first electrode 120 and the second electrode 130 on the first surface 111 and the second surface 112 of the piezoelectric substrate 110, the piezoelectric substrate 110 generates mechanical vibrations, i.e., high-frequency body acoustic waves, due to the inverse piezoelectric effect (electrical energy converted into mechanical energy) of the piezoelectric substrate 110 material. When the acoustic wave can act on the aerosol generating matrix on the surface of the atomization chip 100, capillary waves (surface tension waves) can be formed on the surface of the aerosol generating matrix when the vibration acceleration of the piezoelectric substrate 110 surface is as high as 108m / s. When the acoustic wave frequency of the piezoelectric substrate 110 is higher than the frequency of the capillary wave, the surface tension of the aerosol generating matrix is ​​insufficient to maintain its geometric shape, thereby atomization occurs to form an aerosol, and the droplet diameter of the aerosol formed depends on the capillary wave wavelength.

[0061] The resonance frequency of the fogging chip is determined by the thickness of the piezoelectric substrate 110 , specifically: f0=c*n / 2h.

[0062] Where: f0 is the resonant frequency of the atomizer chip 100;

[0063] c is the propagation velocity of the acoustic wave in the piezoelectric substrate 110;

[0064] n is the number of antinodes. It should be noted that n is a positive integer, and only when n is an odd number can the resonant wave be excited;

[0065] h is the thickness of the piezoelectric substrate 110 .

[0066] It can be seen that the resonant vibration of the piezoelectric substrate 110 is affected by the thickness of the substrate, and the thickness of the piezoelectric substrate 110 can be set between 0.1 mm and 2 mm, for example, 0.1 mm, 0.5 mm, 1 mm, 2 mm, etc. It is understandable that the thickness of the piezoelectric substrate 110 will directly affect the bearing capacity, structural stability and performance of the piezoelectric substrate 110.

[0067] If the thickness of the piezoelectric substrate 110 is too thin, the effective working area of ​​the piezoelectric substrate 110 will be reduced, which may easily lead to a decrease in its operating frequency, and the piezoelectric effect of the piezoelectric substrate 110 will be greatly affected, thereby reducing the performance of the piezoelectric substrate 110. In addition, a piezoelectric substrate 110 that is too thin may cause its structure to be unstable and prone to damage. If the thickness of the piezoelectric substrate 110 is too thick, the effective working area of ​​the piezoelectric substrate 110 will be increased, which will help to increase its operating frequency, and the piezoelectric effect of the piezoelectric substrate 110 will also be enhanced, thereby improving its performance. However, a piezoelectric substrate 110 that is too thick will cause its structural stability to decrease, and may increase its weight, thereby affecting the overall performance of the chip. Therefore, in the embodiment of the present application, the thickness of the piezoelectric substrate 110 is preferably 0.3 mm or 0.5 mm.

[0068] Due to the thermoelectricity of the piezoelectric substrate 110, an abnormal electric field is usually generated between the edges of the electrodes. The stress concentration here can easily lead to edge collapse and cracking of the piezoelectric substrate 110. When the atomizer chip 100 in the embodiment of the present application is working, the gap between the edge of the first area 1111 and the edge of the second area 1112 will not conduct electricity. This can reduce the edge collapse rate of the piezoelectric substrate 110. Compared with the atomizer chip 100 in the prior art, the edge collapse rate can be reduced from 95% to 10%. The atomizer chip 100 provided in the embodiment of the present application can effectively reduce the edge collapse rate, thereby increasing the service life of the electronic atomization device 1.

[0069] Please also see Figure 1 and Figure 2 In the present embodiment, the housing 200 has an air inlet 210 and an air outlet 220, the nozzle 20 can be connected to the air outlet 220, the air inlet 210 can be connected to the side wall of the atomizer base 30, specifically, the atomizer base 30 can be provided with an air inlet hole 310, the air inlet hole 310 can be used to allow outside air to enter the interior of the atomizer base 30, the atomizer base 30 can be connected to the atomizer 10, specifically, the air inlet hole 310 can be connected to the air inlet 210, so that the air inlet 210 can be connected to the atomizer 10.

[0070] The interior of the housing 200 may form an oil tank 230, an atomizing chamber 240, an air inlet channel 250, and an air flow channel 260; the oil tank 230 has a smoke oil channel 231, which may be used to store an aerosol-generating matrix, and the aerosol-generating matrix may flow out through the smoke oil channel 231, the smoke oil channel 231 is connected to the atomizing chamber 240, and the aerosol-generating matrix may cooperate with the atomizing chip 100 located in the atomizing chamber 240 after passing through the smoke oil channel 231 to generate an aerosol. One end of the air inlet channel 250 is connected to the atomizing chamber 240, and the other end is connected to the air inlet 210; one end of the air flow channel 260 is connected to the atomizing chamber 240, and the other end is connected to the air outlet 220.

[0071] It should be noted that the embodiment of the present application does not limit the specific structure inside the shell 200, nor does it limit the structure of the shell 200. For example, the shell 200 can be a columnar structure to simulate the appearance of a traditional cigarette. The present application provides two internal structures of the shell 200. For details, please refer to Figure 2 as well as Figure 7 .

[0072] Figure 2 A cross-sectional view of an atomizer 10 provided in an embodiment of the present application is shown. Figure 7 A cross-sectional view of another atomizer 10 provided in an embodiment of the present application is shown. Figure 2 The embodiment of the present application is a drop-type atomizer 10. In this embodiment, the oil tank 230 can be arranged on the upper part of the atomizer chip 100. The aerosol generating matrix in the oil tank 230 can pass through the smoke oil channel 231 under the action of gravity and then drip onto the atomizer chip 100 to perform an atomization operation. It can be understood that in this embodiment, the electrode corresponding to the smoke oil channel 231 is a pattern electrode, and the first electrode 120 is opposite to the smoke oil channel 231. The aerosol generating matrix can pass through the smoke oil channel 231 and then drip onto the first electrode 120. Therefore, the first electrode 120 is a pattern electrode, and the specific structure of the second electrode 130 is not limited at this time.

[0073] Then see Figure 7 , the embodiment of the present application is a drainage-type atomizer 10. In this embodiment, the oil tank 230 can be arranged on one side of the atomizer chip 100. For example, as shown in the figure, the atomizer chip 100 can be arranged on the left side of the oil tank 230. At this time, the smoke oil channel 231 is a bent channel, one end of which is connected to the oil tank 230, and the other end is connected to the atomizer chip 100. Similarly, in this embodiment, the electrode corresponding to the smoke oil channel 231 is a pattern electrode, and the first electrode 120 is opposite to the smoke oil channel 231. The aerosol generating matrix can pass through the smoke oil channel 231 and then drip onto the first electrode 120. Therefore, the first electrode 120 is a pattern electrode, and the specific structure of the second electrode 130 is not limited at this time.

[0074] For further information, please refer to Figure 7 In this embodiment, the atomizer 10 may further include: an oil guide block 300, which may be disposed at the connection between the smoke oil channel 231 and the atomization chamber 240 and corresponds to the atomization chip 100. The oil guide block 300 may be used to assist the atomization chip 100 in absorbing the aerosol generation matrix and accelerate the contact between the aerosol generation matrix and the atomization chip 100. Therefore, the setting of the oil guide block 300 may improve the atomization efficiency. It should be noted that the embodiment of the present application does not limit the specific structure and material of the oil guide block 300, for example, it may be a square or cylindrical porous ceramic.

[0075] For further information, please also refer to Figure 2 and Figure 7 In some embodiments, the atomizer 10 may further include: a chip holder 400, the chip holder 400 is disposed in the atomization chamber 240, and the atomization chip 100 is disposed on the chip holder 400. The chip holder 400 can be used to support the atomization chip 100 to prevent the atomization chip 100 from contacting the housing 200, causing leakage of the housing 200, etc. The embodiment of the present application also does not limit the specific structure of the chip holder 400, for example, it can match the shape of the atomization chip 100, etc. The embodiment of the present application also does not limit the material of the chip holder 400, for example, it can be made of insulating materials such as rubber, silicone, and resin.

[0076] Please refer again Figure 2 and Figure 7 In some embodiments, the atomizer 10 may include a connector 500 for connecting the atomizer 10 and the atomizer base 30. The connector 500 may be a magnetic component made of a magnetic material. A connector (not shown) matching the connector 500 may be provided in the atomizer base 30 to facilitate the connection between the atomizer 10 and the atomizer base 30.

[0077] The electronic atomization device 1 provided in the embodiment of the present application can be configured by setting the atomization chip 100 to a structure in which the second electrode 130, the piezoelectric substrate 110 and the first electrode 120 are stacked in sequence, wherein a first area 1111 and a second area 1112 surrounding the first area 1111 are arranged on the first surface 111 of the piezoelectric substrate 110, and a third area 1121 and a fourth area 1122 surrounding the third area 1121 are arranged on the surface of the piezoelectric substrate 110 opposite to the first surface 111, the first electrode 120 is arranged in the first area 1111, and the second electrode 130 is arranged in the third area 1121, so that there is a certain gap between the edges of the first electrode 120 and the second electrode 130 and the edges of the piezoelectric substrate 110, and when the atomization chip 100 is working, the above-mentioned gap will not be conductive, thereby reducing the edge collapse rate of the atomization chip 100, and further increasing the service life of the electronic atomization device 1.

[0078] The electronic atomization device provided in the embodiment of the present application is used to heat the aerosol generating matrix to generate an aerosol for the user. The heating method may be convection, conduction, radiation or a combination thereof. The aerosol generating matrix may be in the form of a liquid, a gel, a paste or a solid, etc. When the aerosol generating matrix is ​​solid, it may be a solid in the form of crushed, granulated, powdered, granular, strip or sheet. The aerosol generating matrix includes, but is not limited to, materials used for medical, health, health and beauty purposes, for example, the aerosol generating matrix is ​​a medicinal liquid, an oil, or the aerosol generating matrix is ​​a plant material, such as plant roots, stems, leaves, flowers, buds, seeds, etc.

[0079] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0080] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An atomization chip, characterized in that: include: A piezoelectric substrate, wherein the piezoelectric substrate has a first surface and a second surface opposite to each other, wherein the first surface has a first region and a second region surrounding the first region, and the second surface has a third region and a fourth region surrounding the third region; a first electrode, the first electrode being disposed in the first region; as well as The second electrode is disposed in the third region.

2. The atomization chip according to claim 1, characterized in that: The first electrode and / or the second electrode is a pattern electrode.

3. The atomization chip according to claim 2, characterized in that: The pattern shape of the first electrode and / or the second electrode is a rhombus, a trapezoid, a cross, a corner-less rectangle or an octagon.

4. The atomization chip according to claim 2, characterized in that: The pattern shape of the first electrode and / or the second electrode is teardrop-shaped, string-shaped, crescent-shaped, starburst-shaped, octagonal-shaped, cloud-shaped, lightning-shaped, or heart-shaped.

5. The atomization chip according to claim 2, characterized in that: The pattern shape of the first electrode and / or the second electrode is a reciprocating bending structure.

6. The atomization chip according to claim 2, characterized in that: The pattern shape of the first electrode and / or the second electrode is an interdigitated structure.

7. The atomization chip according to claim 1, characterized in that: The thickness of the first electrode and / or the second electrode is 10 nm-3000 nm.

8. The atomization chip according to claim 1, characterized in that: The piezoelectric substrate includes at least one of lithium niobate, lithium tantalate, quartz, sodium potassium niobate, polyvinylidene fluoride, and aluminum nitride.

9. The atomization chip according to claim 1, characterized in that: The thickness of the piezoelectric substrate is 0.1 mm-2 mm.

10. The atomization chip according to claim 1, characterized in that: The first electrode and / or the second electrode is made of at least one of gold, silver, aluminum, chromium, titanium, stainless steel, and graphite.

11. An atomizer, characterized in that: include: A shell, wherein the shell has an air inlet and an air outlet, and an oil tank, an atomization cavity, an air inlet channel and an air flow channel are formed inside the shell; The oil tank has a smoke oil channel, the smoke oil channel is connected to the atomizing chamber, one end of the air inlet channel is connected to the atomizing chamber, and the other end is connected to the air inlet, one end of the air flow channel is connected to the atomizing chamber, and the other end is connected to the air outlet; as well as The atomizer chip according to any one of claims 1 to 10, wherein the atomizer chip is disposed in the atomization chamber and corresponds to the e-liquid channel; the first electrode and the second electrode of the atomizer chip are used to connect to a power source.

12. The atomizer according to claim 11, characterized in that The atomizer further includes: an oil guide block, which is arranged at the connection point between the smoke oil channel and the atomization chamber and corresponds to the atomization chip.

13. The atomizer according to claim 11, characterized in that The atomizer further comprises: a chip bracket, wherein the chip bracket is arranged in the atomization chamber, and the atomization chip is arranged on the chip bracket.

14. The atomizer according to claim 11, characterized in that The first electrode is disposed corresponding to the smoke oil channel, and the first electrode is a pattern electrode.

15. An electronic atomization device, characterized in that: include: A suction nozzle, an atomizer base, a power supply assembly, and an atomizer as described in any one of claims 11 to 14, wherein the suction nozzle is connected to the air outlet, the atomizer is arranged on the atomizer base, the atomizer base has an air inlet, the air inlet is connected to the air inlet, and the power supply assembly is electrically connected to the atomization chip of the atomizer.

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