An electronic atomization device and its atomizer and atomization core

Abstract

The present invention relates to an electronic atomization device and an atomizer and an atomization core thereof. The atomization core is used to atomize an atomization liquid, and the atomization core comprises a piezoelectric substrate having a cylindrical surface, an atomization area formed on the surface of the piezoelectric substrate, and an interdigital transducer attached to the surface of the piezoelectric substrate. In the present invention, the mechanical vibration of the surface acoustic wave is used to atomize the aerosol-generating matrix, which belongs to a type of cold atomization and can improve the problems of poor atomization consistency and low aroma restoration in the current atomization process.

Description

Technical Field

[0001] The present invention relates to the field of atomization, and more specifically, to an electronic atomization device and an atomizer and an atomization core thereof. Background Art

[0002] For electronic atomization devices, traditional electric heating atomization devices have the advantages of fast heat conduction rate and high atomization efficiency, but they have problems such as poor fog consistency and weak aroma restoration. For medical atomization devices, current ultrasonic atomization devices also have problems such as poor fog consistency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an improved electronic atomization device and an atomizer and atomization core thereof.

[0004] The technical solution adopted by the present invention to solve its technical problem is: constructing an atomizer core, which is used to atomize atomized liquid. The atomizer core includes a piezoelectric substrate with a cylindrical surface, an atomization area formed on the surface of the piezoelectric substrate, and an interdigital transducer attached to the surface of the piezoelectric substrate.

[0005] Preferably, a dielectric layer is provided on the piezoelectric substrate to form the atomization region, and the dielectric layer is used to transmit the atomized liquid.

[0006] Preferably, the dielectric layer comprises a porous dielectric layer formed by covering the surface of the piezoelectric substrate with a material having piezoelectric properties by magnetron sputtering, physical vapor deposition or chemical vapor deposition; or,

[0007] The dielectric layer comprises a porous dielectric layer formed by covering the surface of the piezoelectric substrate with cotton fiber, polyester fiber, glass fiber or porous ceramic material.

[0008] Preferably, the dielectric layer has a thickness of 1 μm to 8000 μm.

[0009] Preferably, the dielectric layer has a thickness of 100 μm to 2000 μm.

[0010] Preferably, the piezoelectric substrate is a cylindrical structure, and the atomization core further comprises a preheating element for preheating the atomized liquid in the atomization area, wherein the preheating element is embedded in the piezoelectric substrate and located on the axis of the piezoelectric substrate.

[0011] Preferably, the preheating element comprises a resistance wire or a thick film heating layer.

[0012] Preferably, the IDT comprises two IDTs, and the two IDTs are respectively distributed on both sides of the atomization area.

[0013] Preferably, the interdigital transducer is in a C-shaped structure or an arc-shaped structure, surrounding the circumference of the piezoelectric substrate.

[0014] Preferably, the IDT is a delay line IDT, or a focusing IDT.

[0015] Preferably, the atomization core further comprises a finger portion attached to the surface of the piezoelectric substrate, and the finger portion is arranged on a side of the interdigital transducer away from the atomization area.

[0016] Preferably, the atomizer core further includes a first lead and a second lead for connecting to an external signal source, and two ends of the interdigital transducer are respectively connected to the first lead and the second lead; one of the first lead and the second lead serves as an input end, and the other serves as an output end.

[0017] Preferably, the first lead and the second lead have the same trajectory and are parallel to each other and perpendicular to the axis of the piezoelectric substrate.

[0018] Preferably, the material of the piezoelectric substrate comprises a lithium niobate piezoelectric single crystal in a Y-cut X 128° direction; or,

[0019] The material of the piezoelectric substrate includes non-piezoelectric glass / ceramic as a supporting substrate,

[0020] and a ZnO piezoelectric film covering the surface of the substrate; or,

[0021] The material of the piezoelectric substrate includes piezoelectric ceramics.

[0022] Preferably, the electromechanical coupling coefficient K of the piezoelectric substrate is 2 The value is not less than 0.5%.

[0023] Preferably, the electromechanical coupling coefficient K of the piezoelectric substrate is 2 The value is not less than 2%.

[0024] Preferably, the propagation loss of the piezoelectric substrate is no more than 0.2 dB / λ.

[0025] Preferably, the surface flatness of the piezoelectric substrate is no greater than 50 μm.

[0026] The present invention further provides an atomizer, the atomizer comprising a liquid storage device, a seat assembly and an atomizer core as described in any one of the above items; the liquid storage device is sleeved on the seat assembly; the liquid storage device is provided with a liquid storage cavity and an air flow duct communicating with the outside, the seat assembly is provided with an accommodating space, and the atomizer core is arranged in the accommodating space;

[0027] The atomization area of ​​the atomization core is respectively connected with the liquid storage cavity to form a partial liquid guide channel and connected with the air flow pipeline to form a partial air flow channel; the liquid guide channel and the air flow channel are isolated from each other.

[0028] The present invention also provides an electronic atomization device, which includes a power supply device and the above-mentioned atomizer connected to the power supply device.

[0029] The atomizer core of the present invention has the following beneficial effects: the mechanical vibration of the surface acoustic wave is used to atomize the aerosol-generating matrix, which is a kind of cold atomization and can improve the problems of poor atomization consistency and low aroma restoration in the current atomization process.

[0030] The atomizer, by being provided with the atomization core of the present invention, has the advantages of good atomization consistency and high aroma restoration degree.

[0031] The electronic atomization device, by being provided with the atomization core of the present invention, has the advantages of good atomization consistency and high aroma restoration degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 is a schematic diagram of the three-dimensional structure of the atomizer core in one embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the atomizer core from another angle;

[0035] Figure 3 is a schematic diagram of the three-dimensional structure of an atomizer in one embodiment of the present invention;

[0036] Figure 4 yes Figure 3 A schematic diagram of the exploded structure of the atomizer shown;

[0037] Figure 5 yes Figure 3 Another exploded structural schematic diagram of the atomizer shown;

[0038] Figure 6 yes Figure 5 A cross-sectional view of the atomizer shown;

[0039] Figure 7 yes Figure 3 A cross-sectional view of the atomizer shown;

[0040] Figure 8 yes Figure 3 Another cross-sectional view of the atomizer shown.

[0041] In the accompanying drawings, 100. atomizer, 101. atomization assembly, 1. atomization core, 11. piezoelectric substrate, 12. atomization area, 121. dielectric layer, 13. interdigital transducer, 131. first finger, 132. bus bar, 14. finger portion, 141. second finger, 151. first lead, 152. second lead, 16. preheating member, 2. lower seat, 21. base, 221. first support wall, 222. second support wall, 23. atomization chamber, 24. air inlet, 25. air inlet hole, 26. accommodating groove, 27. clamping portion, 28. lead groove, 29. support block, 290. connecting wall, 3. sealing sleeve, 31. first sleeve connection portion, 32. second sleeve connection portion, 33. connecting portion, 331. liquid guide Mouth, 4. Upper seat, 41. Main body, 411. First step, 412. Ventilation groove, 413. Liquid channel, 414. Lower liquid port, 415. Second guide wall, 42. Sleeve connection part, 421. First shielding wall, 422. Second shielding wall, 423. Displacement groove, 424. Air window, 4241. Upper part, 4242. Lower part, 425. First guide wall, 5. Sleeve body, 51. Top wall, 52. Side wall, 53. Air outlet channel, 54. Liquid inlet hole, 6. Liquid storage device, 61. Shell, 611. Liquid storage shell, 6111. Air outlet, 612. Sleeve connection shell, 62. Air flow duct, 63. Liquid storage cavity, 631. Liquid outlet, 64. Second step, 65. Slot, 7. Magnetic element. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figure 1 and Figure 2 It is an atomizer core in an embodiment of the present invention. The atomizer core 1 can be used in the atomization of atomized liquid, wherein the atomized liquid can include liquid media such as smoke liquid and medicine liquid.

[0044] The atomizer core 1 may include a piezoelectric substrate 11 , an atomization region 12 , and an IDT 13 . The atomization region 12 may be formed on a surface of the piezoelectric substrate 11 , and the IDT 13 may be attached to the surface of the piezoelectric substrate 11 .

[0045] The piezoelectric substrate 11 has a cylindrical surface. Specifically, the piezoelectric substrate 11 may be a cylindrical structure. The cylindrical structure of the piezoelectric substrate 11 has the advantages of small structure and large atomization area 12. In other embodiments, the piezoelectric substrate 11 may also be a cylindrical structure. In other embodiments, the piezoelectric substrate 11 may be a columnar structure other than a cylindrical structure, and its cross section may be an ellipse, square, rhombus, trapezoid or other shapes.

[0046] When manufacturing the atomizer core 1, the following requirements are imposed on the piezoelectric substrate 11: In order to form the interdigital transducer 13, the piezoelectric substrate 11 must have a surface as good as possible, and the surface flatness of the piezoelectric substrate 11 is preferably below the micron level, for example, the surface flatness of the piezoelectric substrate 11 is not greater than 50 μm. In order to improve the energy conversion efficiency, the electromechanical coupling coefficient of the piezoelectric substrate 11 is as high as possible, for example, the electromechanical coupling coefficient K of the piezoelectric substrate 11 is 2 The value is not less than 0.5%; further, the electromechanical coupling coefficient K of the piezoelectric substrate 11 2 The value is not less than 2%. The propagation loss of the piezoelectric substrate 11 should be small, for example, the propagation loss of the piezoelectric substrate 11 is not greater than 0.2dB / λ. The temperature coefficient of the propagation velocity should be small so that the influence of temperature change on the waveform is small. The piezoelectric substrate 11 should have good repeatability, high reliability, and be suitable for mass production. The cost of the piezoelectric substrate 11 should be low.

[0047] The piezoelectric substrate 11 includes three types: piezoelectric single crystal, piezoelectric ceramic and piezoelectric film. Specifically, the material of the piezoelectric single crystal may include quartz single crystal, LiNbO3, LiTaO3, Li2B4O7, Bi 12 GeO 20 、Bi 12 SiO 20 Piezoelectric ceramic materials may include PZT-based piezoelectric ceramics, etc. Piezoelectric film refers to a surface acoustic wave device made by using a non-piezoelectric substrate and covering the substrate with a piezoelectric film with a thickness of one wavelength. Among them, piezoelectric film materials may include ZnO, AlN, CsS, ZnS, KNbO3, LiNbO3, SiO2 / ZnO, etc.

[0048] The cross section of the piezoelectric substrate 11 is circular, and the atomization region 12 is formed on the surface of the piezoelectric substrate 11 as the region where atomization occurs. Among them, the atomization region 12 is a continuously arranged region. In the axial direction, the atomization region 12 can be arranged to extend along the axial direction of the piezoelectric substrate 11; in the circumferential direction, the atomization region 12 can surround the circumference of the piezoelectric substrate 11 to form a C-shaped structure or an arc structure; or the atomization region 12 can surround the circumference of the piezoelectric substrate 11 to form an annular structure. Specifically, the atomization region 12 can be formed by providing a dielectric layer 121 on the piezoelectric substrate 11, and the dielectric layer 121 is used to transmit the atomized liquid. It can be understood that the area of ​​the atomization region 12 can be the same as the area of ​​the dielectric layer 121.

[0049] The dielectric layer 121 may be a porous dielectric layer formed by covering the surface of the piezoelectric substrate 11 with cotton fiber, polyester fiber, glass fiber or porous ceramic material, wherein the dielectric layer 121 preferably uses a material with piezoelectric properties. The dielectric layer 121 may also be a porous dielectric layer with piezoelectric properties formed by covering the surface of the piezoelectric substrate 11 with a material with piezoelectric properties by magnetron sputtering, other physical vapor deposition (PVD), chemical vapor deposition (CVD) and other methods. It can be understood that the dielectric layer 121 is preferably a porous dielectric layer with piezoelectric properties prepared by magnetron sputtering, chemical vapor deposition and other methods.

[0050] The atomization region 12 conducts the atomized liquid to the medium layer 121 through the porous structure of the medium layer 121 and can store the atomized liquid in the medium layer 121, so that the atomized liquid exists in the atomization region 12 for atomization. The atomization efficiency of the atomization region 12 is closely related to the thickness of the medium layer 121, and the thickness of the medium layer 121 can range from 1 μm to 8000 μm. Preferably, the thickness of the medium layer 121 ranges from 100 μm to 2000 μm.

[0051] The interdigital transducer 13 can be attached to the surface of the piezoelectric substrate 11, and is used to atomize the atomized liquid in the atomization area 12 through surface acoustic waves. The interdigital transducer 13 includes at least one; for example, the interdigital transducer 13 includes two, and the two interdigital transducers 13 are respectively distributed on both sides of the atomization area 12; or, the interdigital transducer 13 includes one or more.

[0052] Each IDT 13 surrounds the cylindrical piezoelectric substrate 11 , and the IDT 13 may be in a C-shaped structure, an arc-shaped structure or other structures.

[0053] The atomizer core 1 also includes finger portions 14, the number of which is equal to the number of the IDTs 13. The finger portions 14 are attached to the surface of the piezoelectric substrate 11 and are arranged on the side of the IDT 13 away from the atomization area 12, so as to reflect the surface acoustic wave, thereby generating a surface acoustic wave with a larger amplitude.

[0054] The IDT 13 can be selected as a conventional IDT, a delay line IDT or a focusing IDT, wherein the surface acoustic wave excited by the conventional IDT is a traveling wave.

[0055] The surface acoustic wave excited by the delay line type interdigital transducer is a standing wave, and the traveling waves on both sides can be superimposed to generate a standing wave. In the case where the finger strips 14 are provided on both sides of the atomization area 12, the finger strips 14 reflect the surface acoustic wave to generate a surface acoustic wave with a larger amplitude. Compared with the traditional interdigital transducer, the delay line type interdigital structure can better utilize the energy of the radio frequency signal, the size of the device can be reduced accordingly, and it has a good inhibitory effect on reducing the secondary peak generated by the spray droplets.

[0056] The energy loss of the focused IDT is small, and the interference effect of the sound wave on the surface acoustic wave at the excitation frequency after reflection is reduced, and the energy can be focused at the target position to achieve more precise control. It can be understood that the IDT 13 is preferably a delay line IDT or a focused IDT.

[0057] The atomizer core 1 also includes a lead portion for connecting the interdigital transducer 13 to an external signal source, and the number of the lead portions corresponds to the number of the interdigital transducers 13, that is, the number is equal. Among them, the lead portion includes a first lead 151 and a second lead 152, and one end of each of the two ends of the interdigital transducer 13 is connected to one of the leads, and the other end is connected to the other lead. One of the first lead 151 and the second lead 152 is connected to the external signal source as an input end, and the other is connected to the external signal source as an output end. Among them, the structures of the first lead 151 and the second lead 152 can be the same or different.

[0058] The atomizer core 1 may further include a preheating element 16, which is used to preheat the atomized liquid in the atomization area 12 to reduce the viscosity of the atomized liquid, making atomization easier to occur. The heating method of the preheating element 16 may be resistance heating, electromagnetic heating, infrared heating, etc. The preheating element 16 may be arranged inside the piezoelectric substrate 11 or on the liquid guide channel.

[0059] In a specific embodiment, if Figure 1 As shown, the atomization core 1 includes a piezoelectric substrate 11, an atomization area 12 and an interdigital transducer 13. The piezoelectric substrate 11 is cylindrical, and the atomization area 12 is formed on the surface of the piezoelectric substrate 11, extending a length to both ends along the axis of the piezoelectric substrate 11, and surrounding the circumference of the piezoelectric substrate 11 to form an annular structure. Among them, the axial length of the atomization area 12 can be one-fourth of the axial length of the piezoelectric substrate 11 or other proportional relationships. In this specific embodiment, the piezoelectric substrate 11 is cylindrical, which is conducive to the miniaturization setting and structural matching of the piezoelectric substrate 11, and a larger area of ​​the atomization area 12 can be set.

[0060] The material of the piezoelectric substrate 11 can be a lithium niobate piezoelectric single crystal in the 128° direction of the Y-cut X direction, or a ZnO piezoelectric film covering the surface of a non-piezoelectric glass / ceramic material as a supporting substrate.

[0061] The atomization region 12 can be formed by providing a dielectric layer 121 on the piezoelectric substrate 11. Specifically, the dielectric layer 121 can be a porous dielectric layer formed by magnetron sputtering using a material having piezoelectric properties. The material having piezoelectric properties can be selected from LiNbO3 (lithium niobate), SiO2 / ZnO, etc.

[0062] The interdigital transducer 13 is attached to the surface of the piezoelectric substrate 11, and two interdigital transducers 13 are provided, and the two interdigital transducers 13 are distributed on both sides of the atomization area 12 and are separated from the atomization area 12 by a distance. The atomization area 12 can be located in the middle of the axial direction of the piezoelectric substrate 11, and the two interdigital transducers 13 are symmetrically arranged on both sides of the atomization area 12.

[0063] The IDT 13 may be a C-shaped structure, and surrounds the circumference of the piezoelectric substrate 11. The IDT 13 may be a delay line IDT. Specifically, each IDT 13 includes a plurality of first fingers 131 and two bus bars 132. The plurality of first fingers 131 extend along the circumference of the piezoelectric substrate 11 to form a C-shaped structure. The plurality of first fingers 131 are parallel to each other and perpendicular to the axis of the piezoelectric substrate 11. The two bus bars 132 are respectively vertically arranged at both ends of the plurality of first fingers 131. Each bus bar 132 is connected to a portion of the first fingers 131. The first fingers 131 connected to the same bus bar 132 are arranged at intervals and staggered, so that the fingers connected to the two bus bars 132 are arranged crosswise.

[0064] The atomizing core 1 further includes a finger portion 14, which is attached to the surface of the piezoelectric substrate 11 and is disposed on the side of the interdigital transducer 13 away from the atomizing region 12, and can reflect the surface acoustic wave, thereby generating a surface acoustic wave with a larger amplitude. The total axial length of the piezoelectric substrate 11 occupied by the interdigital transducer 13 and the finger portion 14 on the side of the atomizing region 12 is equal to or close to the axial length of the atomizing region 12.

[0065] There are two finger portions 14, which are axially arranged on the piezoelectric substrate 11 and located on the side of the interdigital transducer 13 away from the atomization area 12. Each finger portion 14 includes a plurality of second fingers 141, which extend along the circumference of the piezoelectric substrate 11 to form a C-shaped structure. The plurality of second fingers 141 are parallel to each other and perpendicular to the axis of the piezoelectric substrate 11, that is, the plurality of second fingers 141 are parallel to each other and the plurality of first fingers 131, and the length of the second fingers 141 extending along the circumference of the piezoelectric substrate 11 is equal to the length of the first fingers 131 extending along the circumference of the piezoelectric substrate, that is, the second fingers 141 have the same structure as the first fingers 131.

[0066] In some specific embodiments, each interdigital transducer 13 may include seven first fingers 131, and each finger portion 14 may include three second fingers 141, wherein in the same atomizer core 1, the spacing between the first fingers 131 and the first fingers 131, between the first fingers 131 and the second fingers 141, and between the second fingers 141 and the second fingers 141 are equal, and the finger widths of each first finger 131 and each second finger 141 are equal. It can be understood that the finger width, finger spacing, and finger pair number of the interdigital transducer 13 and the finger portion 14 can be set according to requirements.

[0067] The atomizer core 1 also includes a lead portion for connecting the interdigital transducer 13 to an external signal source, and two lead portions are provided, each of which is connected to a corresponding interdigital transducer 13. Specifically, each lead portion includes a first lead 151 and a second lead 152, the first lead 151 is connected to one of the bus bars 132 of the interdigital transducer 13, and the second lead 152 is connected to the other bus bar 132, and one of the first lead 151 and the second lead 152 is connected to the external signal source as an input end and the other as an output end.

[0068] The first lead 151 and the second lead 152 have the same structure, are parallel to each other, and are perpendicular to the axis of the piezoelectric substrate 11. The first lead 151 and the second lead 152 can be bent in a direction close to the atomization area 12 and then extend outward in a direction away from the piezoelectric substrate 11.

[0069] The atomizer core 1 further includes a preheating element 16, which can be heated by resistance heating. The preheating element 16 can be embedded in the piezoelectric substrate 11 and located on the axis of the piezoelectric substrate 11, wherein the preheating element 16 can pass through both ends of the axis of the piezoelectric substrate 11, so that the heating working area of ​​the preheating element 16 corresponds to the axis position of the atomization area 12. The preheating element 16 can be a resistance wire or a thick film heating layer.

[0070] Both ends of the preheating element 16 can be connected to the heating signal source through input signal leads, wherein the input signal leads on both ends are led out from the same side or both sides in the radial direction of the piezoelectric substrate 11 .

[0071] In the atomizing core 1 of the present embodiment, the atomized liquid is guided and stored in the atomizing region 12 through the dielectric layer 121, and the preheating member 16 generates heat to heat the atomized liquid, thereby reducing the viscosity of the atomized liquid. When an external signal source applies a high-frequency electrical signal to the interdigital transducer 13 through the lead portion, the piezoelectric effect of the piezoelectric substrate 11 converts the electrical signal into an acoustic signal, thereby forming an acoustic surface wave having the same frequency as the external high-frequency electrical signal and propagating along the surface of the piezoelectric substrate 11. The acoustic surface wave propagates to the atomizing region 12 and contacts the atomized liquid. When the energy carried by the acoustic surface wave can make the surface tension of the sol-generating matrix itself insufficient to maintain its geometric stability, an aerosol is generated, and the generated aerosol particles are small and uniform.

[0072] The present invention also provides an atomizer, such as Figures 3 to 8 As shown, the atomizer 100 includes the above-mentioned atomizer core 1. Specifically, the atomizer 100 may include a seat assembly, a liquid storage device 6 sleeved on the seat assembly, and an atomizer core 1. The atomizer core 1 is installed in the accommodating space of the seat assembly to form an atomizer assembly 101. The atomizer assembly 101 can be used to atomize the atomized liquid, and the liquid storage device 6 can be used to store the atomized liquid to supply it to the atomizer assembly 101.

[0073] The atomizer assembly 101 includes a lower seat body 2, an atomizer core 1 disposed on the lower seat body 2, a sealing sleeve 3 sleeved on the atomizer core 1, an upper seat body 4 disposed on the lower seat body 2 and pressed against the sealing sleeve 3, and a sleeve body 5 sleeved on the upper seat body 4. After the upper seat body 4 presses against the sealing sleeve 3, the atomizer core 1 is tightly clamped between the lower seat body 2 and the upper seat body 4. The existence of the sealing sleeve 3 can achieve the sealing between the atomizer core 1 and the upper seat body 4 and the lower seat body 2 to prevent liquid leakage; it can also make the atomizer core 1 more tightly positioned in the horizontal direction.

[0074] The lower seat body 2 may include a base 21, a first support wall 221 standing on the top surface of the base 21, and a second support wall 222 standing on the top surface of the base 21 and arranged opposite to the first support wall 221. The sealing sleeve 3 is supported between the first support wall 221 and the second support wall 222. The first support wall 221 and the second support wall 222 may be plate-shaped, and the tops of the first support wall 221 and the second support wall 222 are arranged in an arc-shaped concave surface to closely match the arc surface of the sealing sleeve 3.

[0075] The atomizing area 12 of the atomizing core 1 is directly opposite to the base 21 as the atomizing surface, and there is a certain interval between the atomizing surface and the base 21, and the interval forms an atomizing chamber 23 for mixing aerosol and air. Among them, the base 21 is provided with an air inlet 24 on the bottom surface, and the top surface of the base 21 is provided with a plurality of air inlet holes 25, which are connected to the air inlet 24, and the plurality of air inlet holes 25 are evenly distributed between the first supporting wall 221 and the second supporting wall 222. The air inlet 24 corresponds to the plurality of air inlet holes 25, and the size of the air inlet 24 is much larger than the size of the air inlet holes 25, so that a large amount of external air can enter the air inlet 24, and then enter the atomizing chamber 23 through the plurality of air inlet holes 25.

[0076] The base 21 may be roughly in the shape of a flat column with an elliptical cross section, and its bottom surface is concavely formed with two accommodating grooves 26 for accommodating two magnetic elements 7 respectively therein, and the magnetic elements 7 are used to magnetically attract the atomizer 100 and the power supply device together. The two accommodating grooves 26 may be respectively located on the outside of the first supporting wall 221 and the second supporting wall 222. The outer side walls on the two opposite sides of the base 21 are respectively provided with a snap-fitting portion 27 for snap-fitting with the liquid storage device 6, and the snap-fitting portion 27 may be in the shape of a hook.

[0077] The base 21 is also provided with two lead grooves 28 for each lead portion of the atomizer core 1 to pass through. The two lead grooves 28 are respectively located on the outside of the first support wall 221 and the second support wall 222, and are separated by the side walls of the support walls. The lead grooves 28 pass through the top and bottom of the base 21. The first lead 151 and the second lead 152 of each lead portion can pass through the same lead groove 28 to connect with an external signal source. It can be understood that in some embodiments, two electrode columns electrically connected to the input signal lead of the preheating member 16 can also be provided at the bottom of the base 21 for electrical connection with the positive and negative electrodes of the power supply device respectively.

[0078] The base 21 further includes two support blocks 29 standing on the top surface of the base 21, and the two support blocks 29 are respectively located outside the two lead grooves 28, for auxiliary support of the piezoelectric substrate 11. The support block 29 may be in the shape of a block with a thickness greater than the thickness of the support wall, a height less than the height of the support wall, and a top of the support block 29 is arranged in an arc-shaped concave surface to match the arc surface of the piezoelectric substrate 11. In some embodiments, the same components on both sides of the base 21 are arranged symmetrically to facilitate assembly.

[0079] The base 21 also includes a connecting wall 290 arranged on the top surface of the base 21. The connecting wall 290 is arranged in a ring shape. The connecting wall 290 is arranged concentrically with the base 21 and is located on the inner side of the base 21, and encloses the first support wall 221, the second support wall 222, the two support blocks 29 and the two lead grooves 28 therein, so as to cooperate with the first shielding wall 421 and the second shielding wall 422 of the upper seat body 4.

[0080] The sealing sleeve 3 includes a first sleeve portion 31 in an annular shape, a second sleeve portion 32 in a cylindrical shape, and a connecting portion 33 connecting the first sleeve portion 31 and the second sleeve portion 32. The inner diameters of the first sleeve portion 31 and the second sleeve portion 32 are adapted to the outer diameter of the piezoelectric substrate 11 and may be equal to or slightly larger than the diameter of the piezoelectric substrate 11, so as to be tightly sleeved on the outer circumference of the piezoelectric substrate 11. The sealing sleeve 3 may be a silicone sleeve.

[0081] The first sleeve portion 31 and the second sleeve portion 32 are spaced apart, and the space between the two is equal to the space between the first support wall 221 and the second support wall 222. The connecting portion 33 is arranged near the upper seat body 4, and a liquid guide port 331 is provided on the connecting portion 33 to connect the lower liquid port 414 of the upper seat body 4 and the atomization area 12. The portion of the atomization area 12 corresponding to the liquid guide port 331 serves as a liquid guide surface, and the liquid guide surface and the atomization surface are respectively located at two opposite sides of the atomization area 12, thereby isolating the liquid guide channel and the mist channel to prevent liquid leakage.

[0082] The upper seat body 4 includes a cylindrical main body 41 with an elliptical cross section and a sleeve portion 42 connected to the bottom of the main body 41. A first step 411 is formed on the outer peripheral surface of the main body 41 to cooperate with the side wall 52 of the sleeve 5. The sleeve portion 42 extends downward along the bottom edge of the main body 41 and is cylindrical. It includes a first shielding wall 421 and a second shielding wall 422 that are arranged opposite to each other. The first shielding wall 421 and the second shielding wall 422 are respectively located on both sides of the radial direction of the piezoelectric substrate 11. The first shielding wall 421 and the second shielding wall 422 surround the outer periphery of the connecting wall 290, and are spaced apart from the connecting wall 290, and cooperate to enclose the atomizing chamber 23 therein to keep the aerosol in the atomizing chamber 23.

[0083] The bottom surface of the main body 41 is concave to form an arc surface that matches the sealing sleeve 3 and the piezoelectric substrate 11, and the arc surface abuts against the first sleeve portion 31 and the second sleeve portion 32. The first shielding wall 421, the second shielding wall 422, the bottom surface of the main body 41 and the top surfaces of the first support wall 221 and the second support wall 222 form an accommodating space. The atomizer core 1 and the sealing sleeve 3 are accommodated in the accommodating space, and the first lead 151 and the second lead 152 of each lead portion pass through a lead groove 28.

[0084] The sleeve portion 42 further includes a U-shaped clearance groove 423 disposed at the junction of the first shielding wall 421 and the second shielding wall 422 , and the clearance groove 423 allows two ends of the piezoelectric substrate 11 to be exposed.

[0085] The main body 41 also includes a ventilation groove 412 located in the center thereof and two liquid channels 413 located on both sides of the ventilation groove 412. The ventilation groove 412 runs through the top of the main body 41 and the bottom is V-shaped. The first shielding wall 421 and the second shielding wall 422 are provided with a gas window 424 that runs through the shielding wall. The gas window 424 connects the atomizing chamber 23 with the ventilation groove 412. The upper part 4241 of the gas window 424 is arranged above the first step 411 and corresponds to the ventilation groove 412, and can be arranged in a rectangular shape. The lower part 4242 of the gas window 424 is connected to the upper part 4241 and corresponds to the two sides of the piezoelectric substrate 11 in the radial direction. A first guide wall 425 is provided on the inner wall surface of the air window 424, the lower end of the first guide wall 425 blocks the upper part of the lower part 4242, the upper end is connected to the bottom of the ventilation groove 412, and the first guide wall 425 gradually narrows at one end close to the ventilation groove 412, so that the aerosol in the atomization chamber 23 can pass through the lower part of the lower part 4242 of the air window 424, and then flow along the first guide wall 425 into the ventilation groove 412 and come out of the ventilation groove 412.

[0086] The two liquid channels 413 are respectively located on both sides of the ventilation groove 412 and are separated by the side wall of the ventilation groove 412. A lower liquid port 414 is provided at the bottom of the main body 41. The lower liquid port 414 connects the two liquid channels 413 and the liquid guide port 331. The lower liquid port 414 is located below the ventilation groove 412 and is separated by the bottom wall of the ventilation groove 412. The size of the lower liquid port 414 is larger than the size of the bottom of the ventilation groove 412 to facilitate the passage of liquid. Among them, the side of the bottom of the liquid channel 413 away from the lower liquid port 414 is higher than the side close to the lower liquid port 414, forming a second guide wall 415 to guide the liquid to flow into the lower liquid port 414. As a result, the trajectory of liquid flow is separated from the trajectory of aerosol flow, which plays a role in preventing liquid leakage.

[0087] The sleeve 5 may be a silicone sleeve, which may include an elliptical top wall 51 and a side wall 52 extending downward from the edge of the top wall 51, the top wall 51 is provided with a central air outlet channel 53 and liquid inlet holes 54 respectively located on both sides of the air outlet channel 53, the sleeve 5 is sleeved on the main body 41, the top wall 51 is pressed against the top of the upper seat 4, the side wall 52 is tightly surrounded on the outer periphery of the main body 41, and the end of the side wall 52 is accommodated on the first step 411. The two liquid inlet holes 54 correspond to and communicate with the two liquid channels 413 respectively, and the air outlet channel 53 is inserted in the ventilation groove 412 and communicates with the ventilation groove 412.

[0088] The liquid storage device 6 includes a shell 61 with an air outlet 6111 and an airflow duct 62 disposed in the shell 61 and connected to the air outlet 6111. The shell 61 includes a liquid storage shell 611 and a sleeve shell 612 connected to the liquid storage shell 611. A liquid storage cavity 63 is formed between the liquid storage shell 611 and the airflow duct 62. The liquid storage cavity 63 includes a liquid outlet 631. The sleeve shell 612 is connected to the periphery of the liquid outlet 631 and is used to be tightly sleeved on the seat assembly. The shell 61 as a whole can be a cylindrical shape with a roughly elliptical cross section.

[0089] A second step 64 is formed between the inner wall surface of the sleeve shell 612 and the inner wall surface of the liquid storage shell 611, and the second step 64 abuts against the top surface of the top wall 51 of the sleeve body 5 of the atomizer assembly 101. In some embodiments, the sleeve shell 612 and the liquid storage shell 611 are integrally formed. The air outlet 6111 can be provided with a flat trumpet shape as a nozzle.

[0090] The air outlet 6111 is in communication with the outside, and the air flow duct 62 extends from the air outlet 6111 toward the liquid outlet 631, and the end thereof extends into the sleeve shell 612, and is inserted into the air outlet channel 53 of the sleeve body 5, and is further in communication with the air outlet 6111. The liquid outlet 631 of the liquid storage chamber 63 is in communication with the two liquid inlet holes 54 of the sleeve body 5. The left and right inner wall surfaces of the sleeve shell 612 are also formed with card slots 65 to respectively cooperate with the card engaging portions 27 of the lower seat body 2, so that the shell 61 and the lower seat body 2 can be conveniently snapped together.

[0091] The present invention also provides an electronic atomization device, which includes the above-mentioned atomizer 100 and a power supply device connected to the atomizer 100, and the power supply device may include a power supply or battery that provides a heating signal source to the preheating member 16, an external signal source that can output a high-frequency electrical signal, and other circuits that cooperate to realize the function. The atomizer 100 can be connected to the power supply device through its magnetic attraction element 7, so that the heating signal source is connected to the input signal lead of the preheating member 16, and the external signal source is connected to the corresponding lead of the interdigital transducer 13.

[0092] The working principle of the electronic atomization device is that the atomized liquid flows from the liquid storage chamber 63 through the liquid outlet 631 to the liquid inlet hole 54 of the sleeve body 5, and then flows from the lower liquid port 414 to the liquid guide port 331 through the liquid channel 413, thereby reaching the liquid guide surface of the atomization area 12 to form a liquid guide channel. The path of the liquid guide channel is as follows: Figure 7 shown.

[0093] The liquid guide surface of the atomization area 12 conducts the atomized liquid to the atomization surface through the dielectric layer 121, the preheating element 16 of the atomization core 1 heats the atomized liquid, and the interdigital transducer 13 generates surface acoustic waves to atomize the heated atomized liquid to generate an aerosol, which is filled in the atomization chamber 23. When the user inhales at the air outlet 6111, the outside air enters the atomization chamber 23 from the air inlet 24 through the air inlet hole 25, and mixes with the aerosol. The mixed gas passes through the lower part 4242 of the air window 424, flows into the ventilation groove 412 along the first guide wall 425, and outputs the air outlet 6111 from the air flow duct 62 through the air outlet channel 53, so that it can enter the user's mouth, forming a mist channel. The path of the mist channel is as follows: Figure 8 The liquid guide channel and the mist channel are isolated from each other and do not affect each other, which has the advantage of preventing liquid leakage.

[0094] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. An atomizing core for atomizing atomizing liquid, characterized in that: The atomizing core (1) comprises a piezoelectric substrate (11) having a cylindrical surface, and a dielectric layer (121) covering the surface of the piezoelectric substrate (11) to form an atomizing region (12), wherein the dielectric layer (121) is used to transmit atomized liquid; the atomizing region (12) is located on the piezoelectric substrate (11) and is a continuously arranged region; the atomizing core (1) further comprises an interdigital transducer (13) adhered to the surface of the piezoelectric substrate (11).

2. The atomizer core according to claim 1, characterized in that: The dielectric layer (121) comprises a porous dielectric layer formed by covering the surface of the piezoelectric substrate (11) with a material having piezoelectric properties by magnetron sputtering, physical vapor deposition or chemical vapor deposition; or, The dielectric layer (121) comprises a porous dielectric layer formed by covering the surface of the piezoelectric substrate (11) with cotton fibers, polyester fibers, glass fibers or porous ceramic materials.

3. The atomizer core according to claim 1, characterized in that: The thickness of the dielectric layer (121) is 1µm to 8000µm.

4. The atomizer core according to claim 3, characterized in that: The thickness of the dielectric layer (121) is 100 µm to 2000 µm.

5. The atomizer core according to claim 1, characterized in that: The piezoelectric substrate (11) is a cylindrical structure, and the atomizing core (1) further comprises a preheating element (16) for preheating the atomized liquid in the atomizing area (12); the preheating element (16) is embedded in the piezoelectric substrate (11) and is located on the axis of the piezoelectric substrate (11).

6. The atomizer core according to claim 5, characterized in that: The preheating element (16) comprises a resistance wire or a thick film heating layer.

7. The atomizer core according to claim 1, characterized in that: The interdigital transducers (13) include two interdigital transducers (13), which are respectively distributed on two sides of the atomization area (12).

8. The atomizer core according to claim 1, characterized in that: The interdigital transducer (13) is in a C-shaped structure or an arc-shaped structure, and surrounds the piezoelectric substrate (11) in a circumferential direction.

9. The atomizer core according to claim 1, characterized in that: The interdigital transducer (13) is a delay line type interdigital transducer, or a focusing type interdigital transducer.

10. The atomizer core according to claim 1, characterized in that: The atomizing core (1) further comprises a finger portion (14) attached to the surface of the piezoelectric substrate (11), and the finger portion (14) is arranged on a side of the interdigital transducer (13) away from the atomizing area (12).

11. The atomizer core according to claim 1, characterized in that: The atomizer core (1) further comprises a first lead (151) and a second lead (152) for connecting to an external signal source, and two ends of the interdigital transducer (13) are respectively connected to the first lead (151) and the second lead (152); one of the first lead (151) and the second lead (152) serves as an input end, and the other serves as an output end.

12. The atomizer core according to claim 11, characterized in that: The first lead (151) and the second lead (152) have the same trajectory and are parallel to each other, and are perpendicular to the axis of the piezoelectric substrate (11).

13. The atomizer core according to claim 1, characterized in that: The material of the piezoelectric substrate (11) comprises a lithium niobate piezoelectric single crystal in a Y-cut X128° direction; or, The material of the piezoelectric substrate (11) includes a non-piezoelectric material glass / ceramic as a supporting substrate. and a ZnO piezoelectric film covering the surface of the substrate; or, The material of the piezoelectric substrate (11) includes piezoelectric ceramics.

14. The atomizer core according to claim 1, characterized in that: The electromechanical coupling coefficient K of the piezoelectric substrate (11) is 2 The value is not less than 0.5%.

15. The atomizer core according to claim 14, characterized in that: The electromechanical coupling coefficient K of the piezoelectric substrate (11) is 2 The value is not less than 2%.

16. The atomizer core according to claim 1, characterized in that: The propagation loss of the piezoelectric substrate (11) is no greater than 0.2 dB / λ.

17. The atomizer core according to claim 1, characterized in that: The surface flatness of the piezoelectric substrate (11) is no greater than 50 μm.

18. An atomizer, characterized in that: The atomizer (100) comprises a liquid storage device (6), a seat assembly, and an atomizer core (1) according to any one of claims 1 to 17; the liquid storage device (6) is sleeved on the seat assembly; the liquid storage device (6) is provided with a liquid storage cavity (63) and an air flow duct (62) communicating with the outside, the seat assembly is provided with a receiving space, and the atomizer core (1) is arranged in the receiving space; The atomization area (12) of the atomization core (1) is respectively connected with the liquid storage chamber (63) to form a partial liquid guide channel, and is connected with the air flow pipeline (62) to form a partial air flow channel; the liquid guide channel and the air flow channel are isolated from each other.

19. An electronic atomization device, characterized in that: The invention comprises a power supply device and the atomizer (100) according to claim 18 connected to the power supply device.

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