CN212633211U - Double-sheet type leadless piezoelectric atomization element - Google Patents
Double-sheet type leadless piezoelectric atomization element Download PDFInfo
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- CN212633211U CN212633211U CN202020232588.4U CN202020232588U CN212633211U CN 212633211 U CN212633211 U CN 212633211U CN 202020232588 U CN202020232588 U CN 202020232588U CN 212633211 U CN212633211 U CN 212633211U
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Abstract
The utility model provides a biplate type leadless piezoelectric atomization component, biplate type leadless piezoelectric atomization component contains two leadless piezoelectric ceramics rings and a metal substrate, and a ceramic ring bonds respectively in the metal substrate both sides to two piezoceramics ring polarization directions are the same. The atomization element is made of piezoelectric ceramic materials without lead elements, and is healthy and environment-friendly; the ceramic plates are respectively arranged on the two sides of the metal plate to form a mechanical series-electrical parallel structure, so that the impedance of the element can be effectively reduced, and the element is easier to drive.
Description
Technical Field
The utility model belongs to the technical field of liquid atomization and leadless piezoelectricity, concretely relates to two-piece type leadless piezoelectricity atomizing component.
Background
The piezoelectric ultrasonic atomizer is an atomizing device with simple structure, low energy consumption and high efficiency, and has wide application in the field of small amount and trace atomization, and a humidifier and a medical atomization inhalation therapeutic apparatus are typical application examples thereof.
The core atomizing element of the existing piezoelectric ultrasonic atomizer is made of lead zirconate titanate (PZT) based piezoelectric material, the mass percent of lead element in the material is 70%, and the material can cause serious damage to the ecological environment in the processes of production, use and waste treatment. When the ultrasonic atomizer works, the lead-containing atomizing element can be directly contacted with liquid to be atomized, and lead in the lead-containing atomizing element can enter into the atomized particles and then be inhaled into the lung.
Lead is a toxic heavy metal which is extremely harmful to human bodies, and lead and compounds thereof can cause damage to multiple systems such as nerves, hematopoiesis, digestion, kidneys, cardiovascular and endocrine after entering the body, particularly for women and children, lead poisoning can cause deformity and damage to infant development, damage to the nervous system of the children, and cause brain tissue damage of the children and even cause lifelong disability. Related policies have been introduced in many countries to limit the use of lead in electronic products, such as the RoHS directive of the european union, which requires that the lead content in electronic components should not exceed 1000 ppm.
Disclosure of Invention
In order to solve the problems, the utility model provides a biplate type leadless piezoelectric atomization component, which is made of piezoelectric ceramic material without lead element, and is healthy and environment-friendly; the ceramic plates are respectively arranged on the two sides of the metal plate to form a mechanical series-electrical parallel structure, so that the impedance of the element can be effectively reduced, and the element is easier to drive.
A two-piece lead-free piezoelectric atomization element comprising:
the lead-free piezoelectric ceramic ring is 5-30 mm in outer diameter, 2-20 mm in inner diameter and 0.1-2 mm in thickness.
Furthermore, the lead-free piezoelectric ceramic ring is made of potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based lead-free piezoelectric ceramic materials.
Further, the molar content of potassium sodium niobate and doped modified materials thereof in the potassium sodium niobate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percent of niobium element is 40-70%; the molar content of sodium bismuth titanate and doped modified materials thereof in the sodium bismuth titanate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percentage of bismuth element is 30-60%; the barium titanate-based lead-free piezoelectric ceramic contains 55-100% of barium titanate and doped modified materials thereof, wherein the mass percentage of barium is 40-70%.
The metal substrate is used for transmitting the vibration energy of the piezoelectric ceramic to the liquid to be atomized, and is circular, the diameter of the metal substrate is 10-35 mm, and the thickness of the metal substrate is 0.1-0.6 mm; a circular micropore area is arranged in the middle of the metal substrate, the diameter of the micropore area is 2-20 mm, and the diameter of micropores in the micropore area is 2-20 microns.
Furthermore, the metal substrate is made of stainless steel.
Furthermore, the biplate lead-free piezoelectric atomization element comprises two lead-free piezoelectric ceramic rings and a metal substrate, wherein two sides of the metal substrate are respectively bonded with a ceramic ring; the lead-free piezoelectric ceramic ring and the metal substrate are bonded by ultraviolet light curing glue or epoxy glue.
Furthermore, the two leadless piezoelectric ceramics have the same polarization direction, one side of the two leadless piezoelectric ceramics connected with the metal sheet is connected with one pole of the power supply, and the side departing from the metal sheet is connected in parallel with the other pole of the power supply.
Furthermore, the working frequency of the double-sheet lead-free piezoelectric atomization element is 50-500 kHz, and preferably 100-150 kHz.
Further, the resonance impedance of the two-piece lead-free piezoelectric atomization element at the working frequency is 1-100 Ω, and preferably, the resonance impedance at the working frequency is 10-30 Ω.
The utility model discloses a bond piezoceramics piece in the sheetmetal both sides, form the parallelly connected structure of "mechanical series-electricity", effectively reduced atomizing element's resonance impedance, make it change the drive, drive voltage is only 50~70% that monolithic atomizing element under the equal volume of fog that goes out.
Drawings
Fig. 1 is a schematic view of a two-plate type lead-free piezoelectric atomization element.
Fig. 2 is a schematic structural view of a two-piece type lead-free piezoelectric atomization element, in which the direction of the arrow represents the polarization direction of the piezoelectric ceramic ring.
Detailed Description
Specific examples of the present invention will be described in further detail below. It should be understood that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
As shown in fig. 1 and described above, a two-piece type lead-free piezoelectric atomization element includes:
the lead-free piezoelectric ceramic ring 10 is characterized in that the outer diameter of the lead-free piezoelectric ceramic ring is 5-30 mm, the inner diameter of the lead-free piezoelectric ceramic ring is 2-20 mm, and the thickness of the lead-free piezoelectric ceramic ring is 0.1-2 mm.
Further, the lead-free piezoelectric ceramic ring 10 is made of potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based lead-free piezoelectric ceramic.
Further, the molar content of potassium sodium niobate and doped modified materials thereof in the potassium sodium niobate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percent of niobium element is 40-70%; the molar content of sodium bismuth titanate and doped modified materials thereof in the sodium bismuth titanate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percentage of bismuth element is 30-60%; the barium titanate-based lead-free piezoelectric ceramic contains 55-100% of barium titanate and doped modified materials thereof, wherein the mass percentage of barium is 40-70%.
The metal substrate 20 is used for transmitting the vibration energy of the piezoelectric ceramic to the liquid to be atomized, and is circular, the diameter of the metal substrate is 10-35 mm, and the thickness of the metal substrate is 0.1-0.6 mm; a circular micropore area 30 is arranged in the middle of the metal substrate 20, the diameter of the micropore area 30 is 2-20 mm, and the diameter of a micropore in the micropore area 30 is 1-20 mu m.
Further, the metal substrate 20 is made of stainless steel.
Furthermore, the two-piece lead-free piezoelectric atomization element comprises two lead-free piezoelectric ceramic rings 10 and a metal substrate 20, wherein two sides of the metal substrate 20 are respectively bonded with a ceramic ring 10; the lead-free piezoelectric ceramic ring 10 and the metal substrate 20 are bonded by ultraviolet light curing glue or epoxy glue.
Furthermore, the two leadless piezoelectric ceramic rings (11 and 12) have the same polarization direction, one side of the two leadless piezoelectric ceramic rings, which is connected with the metal sheet 20, is connected with one pole of the power supply, and the side of the two leadless piezoelectric ceramic rings, which is away from the metal sheet 20, is connected with the other pole of the power supply in parallel.
Furthermore, the working frequency of the double-sheet lead-free piezoelectric atomization element is 50-500 kHz, and preferably 100-150 kHz.
Further, the resonance impedance of the two-piece lead-free piezoelectric atomization element at the working frequency is 1-100 Ω, and preferably, the resonance impedance at the working frequency is 10-30 Ω.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.
Claims (2)
1. A double-sheet lead-free piezoelectric atomization element is characterized in that the working frequency of the atomization element is 120-150 kHz, and the resonant impedance under the working frequency is 10-30 omega; the structure includes:
the lead-free piezoelectric ceramic ring is 5-30 mm in outer diameter, 2-20 mm in inner diameter and 0.1-2 mm in thickness;
the metal substrate is round, the diameter of the metal substrate is 10-35 mm, and the thickness of the metal substrate is 0.1-0.6 mm; a circular micropore area is arranged in the middle of the metal substrate, the diameter of the micropore area is 2-20 mm, and the diameter of micropores in the micropore area is 1-20 microns;
the two-piece lead-free piezoelectric atomization element comprises two lead-free piezoelectric ceramic circular rings and a metal substrate, wherein the two sides of the metal substrate are respectively bonded with the ceramic circular rings, and the two piezoelectric ceramic circular rings have the same polarization direction.
2. The two-piece lead-free piezoelectric atomization element of claim 1, wherein: the lead-free piezoelectric ceramic ring is made of potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based lead-free piezoelectric ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020232588.4U CN212633211U (en) | 2020-03-02 | 2020-03-02 | Double-sheet type leadless piezoelectric atomization element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020232588.4U CN212633211U (en) | 2020-03-02 | 2020-03-02 | Double-sheet type leadless piezoelectric atomization element |
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| Publication Number | Publication Date |
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| CN212633211U true CN212633211U (en) | 2021-03-02 |
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| CN202020232588.4U Active CN212633211U (en) | 2020-03-02 | 2020-03-02 | Double-sheet type leadless piezoelectric atomization element |
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