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CN-121986968-A - Ultrasonic atomizing sheet, atomizer and aerosol generating device

CN121986968ACN 121986968 ACN121986968 ACN 121986968ACN-121986968-A

Abstract

The embodiment of the application provides an ultrasonic atomizing sheet, an atomizer and an aerosol generating device, the ultrasonic atomization sheet comprises piezoelectric ceramics and a metal microporous sheet, wherein the middle area of the piezoelectric ceramics is provided with an avoidance through hole. The metal microporous sheet includes a flat plate portion and a protruding portion. The flat plate part is attached to the piezoelectric ceramic, the protruding part corresponds to the avoidance through hole, the outline of the protruding part is a spherical crown surface, the protruding direction is opposite to the avoidance through hole, the protruding part is provided with a plurality of penetrating micropores, and the metal microporous sheet atomizes the aerosol generating substrate into aerosol in the vibration process. Wherein the inner diameter of the bottom of the spherical crown surface of the protruding part is D, the size of the protruding part in the thickness direction of the metal microporous sheet is H, and H/D is more than or equal to 0.05 and less than or equal to 0.15. According to the ultrasonic atomization sheet provided by the embodiment of the application, the convex part with the outline of the spherical crown surface is arranged, and the ratio of the size of the convex part in the thickness direction of the metal microporous sheet to the inner diameter of the bottom of the spherical crown surface of the convex part is set to be 0.05-0.15, so that the atomization amount is improved, and the use experience is further improved.

Inventors

  • FAN PENGYUAN
  • JIANG TAOMING
  • OUYANG GUANGLIN

Assignees

  • 思摩尔国际控股有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (14)

  1. 1. An ultrasonic atomizing sheet is applied to an aerosol generating device, characterized by comprising the following steps: the middle area of the piezoelectric ceramic is provided with an avoidance through hole; the metal microporous sheet comprises a flat plate part and a protruding part, wherein the flat plate part is attached to the piezoelectric ceramic, the protruding part corresponds to the avoidance through hole, the outline of the protruding part is a spherical crown surface, the protruding direction is opposite to the avoidance through hole, the protruding part is provided with a plurality of penetrating micropores, and the metal microporous sheet atomizes an aerosol generating substrate into aerosol in the vibration process; The inner diameter of the bottom of the spherical crown surface of the protruding part is D, and the height of the protruding part in the thickness direction of the metal microporous sheet is H, wherein H/D is more than or equal to 0.05 and less than or equal to 0.15.
  2. 2. The ultrasonic atomizing sheet according to claim 1, wherein the projection includes a micropore region in which the micropores are formed, and the equivalent diameter of projection of the micropore region on a projection plane perpendicular to the thickness direction of the ultrasonic atomizing sheet is D1,2 mm. Ltoreq.d1. Ltoreq.4mm.
  3. 3. The ultrasonic atomizing sheet of claim 1, wherein the micropores include a liquid suction port on a side facing away from the piezoelectric ceramic; The pore diameter of the liquid suction opening is D2, D2 is more than or equal to 20 mu m and less than or equal to 40 mu m, and/or, The distance between the adjacent liquid suction openings is L1, and L1 is more than or equal to 30 mu m and less than or equal to 100 mu m.
  4. 4. The ultrasonic atomizing sheet according to claim 1, wherein the micropores include a mist outlet facing the piezoelectric ceramic, and the aperture of the mist outlet is D3,1 μm≤D3≤2μm.
  5. 5. The ultrasonic atomizing sheet according to claim 1, wherein D is 3 mm≤D is 8mm and/or H is 0.2 mm≤H is 1mm.
  6. 6. The ultrasonic atomizing sheet according to claim 1, wherein the metal microporous sheet has a dimension H1 in the thickness direction of 0.03 mm≤H1≤0.08 mm, and/or, On a projection plane perpendicular to the thickness direction of the ultrasonic atomization sheet, the equivalent diameter of the projection of the metal microporous sheet is D4, and D4 is more than or equal to 13mm and less than or equal to 14mm.
  7. 7. The ultrasonic atomizing sheet of claim 1, wherein the metal microporous sheet comprises at least one of a stainless steel sheet, a titanium alloy sheet, a palladium nickel alloy sheet, or a gold plated sheet.
  8. 8. The ultrasonic atomizing sheet according to claim 1, wherein the through hole has a pore diameter D5, D5 of 4 mm≤D5≤6mm, and/or, The outer diameter of the piezoelectric ceramic is D6, and D6 is more than or equal to 13mm and less than or equal to 14mm.
  9. 9. The ultrasonic atomizing sheet according to claim 1, wherein the piezoelectric ceramic has a dimension H2 of 0.4 mm≤H2≤0.8 mm in a thickness direction of the ultrasonic atomizing sheet, and/or, The piezoelectric ceramic is made of at least one of lead zirconate titanate, potassium sodium niobate or barium calcium zirconate titanate.
  10. 10. The ultrasonic atomizing sheet according to claim 1, wherein the center axes of the micropores, the metal microporous sheet, and the piezoelectric ceramic are parallel, and/or, The dynamic viscosity of the aerosol-generating substrate at normal temperature ranges from 1cp to 4cp.
  11. 11. An atomizer comprising the ultrasonic atomizer sheet according to any one of claims 1 to 10.
  12. 12. The atomizer of claim 11 wherein said ultrasonic atomizing plate has an operating frequency of 120kHz to 160kHz and/or, The resonant impedance of the ultrasonic atomizing sheet is less than 100 omega, and/or, The driving voltage of the ultrasonic atomization sheet is 60Vpp-100Vpp.
  13. 13. The nebulizer of claim 11, wherein the nebulizer comprises: The shell assembly is internally provided with an air outlet channel, and the air outlet channel extends along the height direction of the atomizer; The device comprises a shell assembly, an atomization seat, a liquid storage cavity, a liquid inlet channel, a liquid outlet channel and a liquid outlet channel, wherein at least one part of the atomization seat is arranged in the shell assembly; The liquid inlet of the liquid inlet channel is in liquid communication with the liquid guide piece, and the ultrasonic atomization piece is positioned at the top side of the liquid guide piece and protrudes towards one side of the liquid guide piece to form the protruding part.
  14. 14. An aerosol-generating device comprising a power supply assembly and the nebuliser of any one of claims 1 to 13, the power supply assembly being electrically connected to the nebuliser.

Description

Ultrasonic atomizing sheet, atomizer and aerosol generating device Technical Field The application relates to the technical field of atomization, in particular to an ultrasonic atomization sheet, an atomizer and an aerosol generating device. Background The aerosol-generating device generally comprises a nebulizer and a power supply assembly electrically connected with the nebulizer, wherein the nebulizer can atomize aerosol-generating substrates stored in the liquid storage cavity in an ultrasonic atomizing mode or in a heating and non-burning mode under the action of electric drive of the power supply assembly to form aerosol for users. In the related art, in the embodiment of atomizing an aerosol-generating substrate by means of ultrasonic atomization, how to improve the structural strength and the atomization efficiency of an ultrasonic atomization sheet is a non-negligible problem in the development of an aerosol-generating device by converting electric energy into mechanical energy of the ultrasonic atomization sheet. Disclosure of Invention In view of the foregoing, it is desirable to provide an ultrasonic atomizing sheet, an atomizer, and an aerosol generating apparatus, which can improve the structural strength and the atomizing efficiency of the ultrasonic atomizing sheet. To this end, a first aspect of an embodiment of the present application provides an ultrasonic atomizing sheet, including: the middle area of the piezoelectric ceramic is provided with an avoidance through hole; the metal microporous sheet comprises a flat plate part and a protruding part, wherein the flat plate part is attached to the piezoelectric ceramic, the protruding part corresponds to the avoidance through hole, the outline of the protruding part is a spherical crown surface, the protruding direction is opposite to the avoidance through hole, the protruding part is provided with a plurality of penetrating micropores, and the metal microporous sheet atomizes an aerosol generating substrate into aerosol in the vibration process; The inner diameter of the bottom of the spherical crown surface of the protruding part is D, and the height of the protruding part in the thickness direction of the metal microporous sheet is H, wherein H/D is more than or equal to 0.05 and less than or equal to 0.15. In some embodiments, the projection comprises a micropore area formed with the micropores, and the equivalent diameter of projection of the micropore area on a projection plane perpendicular to the thickness direction of the ultrasonic atomization sheet is D1, and D1 is more than or equal to 2mm and less than or equal to 4mm. In some embodiments, the microwells include a liquid suction port on a side facing away from the piezoelectric ceramic; The pore diameter of the liquid suction opening is D2, D2 is more than or equal to 20 mu m and less than or equal to 40 mu m, and/or, The distance between the adjacent liquid suction openings is L1, and L1 is more than or equal to 30 mu m and less than or equal to 100 mu m. In some embodiments, the micropores comprise a mist outlet facing one side of the piezoelectric ceramic, and the aperture of the mist outlet is D3, D3 is less than or equal to 1 μm and less than or equal to 2 μm. In some embodiments, 3 mm≤D≤8 mm, and/or 0.2 mm≤H≤1 mm. In some embodiments, the metal microporous sheet has a dimension H1 in the thickness direction of 0.03 mm≤H2≤0.08 mm, and/or, On a projection plane perpendicular to the thickness direction of the ultrasonic atomization sheet, the equivalent diameter of the projection of the metal microporous sheet is D4, and D4 is more than or equal to 13mm and less than or equal to 14mm. In some embodiments, the metal microporous sheet comprises at least one of a stainless steel sheet, a titanium alloy sheet, a palladium nickel alloy sheet, or a gold plated sheet. In some embodiments, the relief through hole has a pore size D5,4mm < D5 < 6mm, and/or, The outer diameter of the piezoelectric ceramic is D6, and D6 is more than or equal to 13mm and less than or equal to 14mm. In some embodiments, the piezoelectric ceramic has a dimension H2 of 0.4 mm≤H2≤0.8 mm in the thickness direction of the ultrasonic atomizing sheet, and/or, The piezoelectric ceramic is made of at least one of lead zirconate titanate, potassium sodium niobate or barium calcium zirconate titanate. In some embodiments, the central axes of the micropores, the metal microporous sheet, and the piezoelectric ceramic are parallel, and/or, The dynamic viscosity of the aerosol-generating substrate at normal temperature ranges from 1cp to 4cp. A second aspect of the embodiments of the present application provides an atomizer comprising the ultrasonic atomizing sheet described above. In some embodiments, the ultrasonic atomizing plate has an operating frequency of 120kHz to 160kHz, and/or, The resonant impedance of the ultrasonic atomizing sheet is less than 100 omega, and/or, The driving voltage of the ultrasonic atomizat