CN214854370U - Atomizer and contain its electron cigarette - Google Patents
Atomizer and contain its electron cigarette Download PDFInfo
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- CN214854370U CN214854370U CN202120667918.7U CN202120667918U CN214854370U CN 214854370 U CN214854370 U CN 214854370U CN 202120667918 U CN202120667918 U CN 202120667918U CN 214854370 U CN214854370 U CN 214854370U
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- interdigital transducer
- acoustic wave
- surface acoustic
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Abstract
An object of the present application is to provide a small-sized atomizer with high atomization efficiency, simple structure, and low power consumption, which comprises a piezoelectric substrate, a pair resonator, a short-circuiting grating, a surface acoustic wave oscillator circuit, and an atomization zone. The pair of resonators comprises a first interdigital transducer and a second interdigital transducer, and the first interdigital transducer and the second interdigital transducer are arranged on the piezoelectric substrate in parallel; the short circuit grids are symmetrically arranged on the outer side of the opposite resonator; the surface acoustic wave oscillator circuit is used for generating self-oscillation to the resonator; an atomization zone is formed between the first interdigital transducer and the second interdigital transducer. The application also provides an electron cigarette that contains above-mentioned atomizer.
Description
Technical Field
The application relates to the field of electronic cigarettes, in particular to a surface acoustic wave atomizer with self-oscillation and an electronic cigarette comprising the same.
Background
Besides being harmful to the health of smokers, smoking also produces "second-hand smoke" which directly harms the health of surrounding people, and in addition, fire caused by cigarette ends is frequent. Although the hazards of smoking are well known to society, there are still a large number of smokers. Therefore, in addition to the conventional promotion and regulation construction, it is important to research new technologies which can meet the needs of smokers and reduce the harm of smoking, which is a research focus in the tobacco industry at present.
Electronic smoking is an important research direction in new technologies. There are many brands of electronic cigarettes on the market, and at present, the electric heating mode is still the main form of electronic cigarette atomized tobacco tar. The principle of electric heating is that the tobacco tar in the oil storage device is dripped into the heating device through the oil guide pipe, the tobacco tar is evaporated to form atomized steam through the high temperature of the heating device, and the atomized steam is inhaled by a user along with the air. However, the high temperature of the electric heating can cause a series of complex decomposition, cracking, carbonization and dissolution reactions of the tobacco tar, the heating element and the oil conduit material, easily affect the pumping quality and have potential health risks.
In order to solve the problems of the electronic cigarette adopting the electric heating mode, normal-temperature atomization technologies such as ultrasonic atomization and surface acoustic wave atomization are produced. However, the currently adopted surface acoustic wave atomization technology requires a signal source to continuously output a signal with a certain frequency, and then converts the signal into a surface acoustic wave through an interdigital transducer for atomization, and the design usually makes the atomizer have a complex structure and low energy utilization rate.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a small-sized atomizer with high atomization efficiency, simple structure, and low power consumption, which comprises a piezoelectric substrate, a pair resonator, a short-circuiting grating, a surface acoustic wave oscillator circuit, and an atomization zone. The pair of resonators comprises a first interdigital transducer and a second interdigital transducer, and the first interdigital transducer and the second interdigital transducer are arranged on the piezoelectric substrate in parallel; the short-circuit grids are symmetrically arranged on the outer side of the resonator, and can comprise a first short-circuit grid and a second short-circuit grid which are used for reflecting the surface acoustic wave to the atomization area; the surface acoustic wave oscillator circuit is used for generating self-oscillation to the resonator; an atomization zone is formed between the first interdigital transducer and the second interdigital transducer. The interdigital transducer described in the present application is a metal pattern formed on the surface of a piezoelectric substrate in the shape of a finger cross like two hands, and its function is to realize acousto-electric transduction. The terms "first" and "second" are used only for distinguishing the respective components, and are not used for limiting the primary and secondary relationships, the signal directions, and the like, for convenience of description.
In the technical scheme, the resonator can self-oscillate, so that an additional signal source is not needed to generate a required frequency signal, the whole circuit design can be simplified, unnecessary frequency signals can be prevented from being generated, and the energy utilization rate is improved.
Further, the surface acoustic wave oscillator circuit comprises a phase shifting network and a signal amplifying circuit. The phase shifting network enables the resonator to generate a self-oscillation signal by adjusting the phase of the signal; the signal amplifying circuit is used for keeping the surface acoustic wave at a set strength. By adopting the technical scheme, as long as the gain of the signal amplification circuit can compensate the loss in the surface acoustic wave propagation and atomization process, the loss of the interdigital transducer and the conversion loss between the signal amplification circuit and the interdigital transducer, a certain phase condition can be met, and the vibration can be started on the resonator and the surface acoustic wave oscillator circuit. In order to achieve the phase condition of oscillation starting, a phase shifting network is usually introduced, and the phase shifting network can be composed of adjustable capacitors and inductors in a series or parallel connection mode.
Further, the phase condition of oscillation starting is as follows: a is LP + LB + LC, phi D + phi E is 2n pi; wherein, A is the gain of the signal amplifying circuit, LP is the surface acoustic wave transmission and atomization loss, LB is the loss of the interdigital transducer, LC is the conversion loss between the signal amplifying circuit and the interdigital transducer, PhiD is the phase shift of the surface acoustic wave oscillator circuit, and PhiE is the phase shift of the signal amplifying circuit and the phase shift network.
Further, the distance between the first interdigital transducer and the second interdigital transducer and the nearest interdigital electrode is 10-10000 times of the wavelength corresponding to the resonance frequency of the resonator. The interdigital electrodes are each finger-shaped metal pattern of the interdigital transducer, and the distance is measured by the two edges of the interdigital electrodes close to the atomization area. By adopting the technical scheme, the surface acoustic wave can form standing waves in the atomization area so as to enhance the vibration amplitude and improve the atomization efficiency.
Further, the atomizer includes a liquid guiding member for guiding the liquid into the atomization zone, the liquid guiding member including a liquid guiding passage and a liquid permeating structure. One end of the liquid guide channel is communicated with the liquid, and the other end of the liquid guide channel is communicated with the liquid seepage structure; the liquid seepage structure is arranged close to the atomization zone and used for guiding the liquid passing through the liquid guide channel into the atomization zone.
Further, the material of the interdigital transducer includes, but is not limited to, aluminum, copper, gold, platinum.
Further, the material of the piezoelectric substrate includes, but is not limited to, quartz, lithium niobate, lithium tantalate, or a silicon wafer.
Another object of the present invention is to provide an electronic cigarette, including any one of the above technical solutions.
The beneficial effect of this application does:
the surface acoustic wave oscillator circuit and the oscillator formed by the resonator can perform self-excited oscillation, so that a signal source is replaced, the energy utilization rate is improved, the circuit structure is simplified, and the reliability of the circuit is improved;
the surface acoustic wave can form a standing wave mode in the atomization area, so that the atomization effect is improved;
the frequency selection characteristic of the resonator is utilized to carry out twice signal frequency screening, the atomizer of the application is applied to the electronic cigarette, the output frequency of the atomizer is stable, and the atomization effect with better consistency is generated.
Drawings
FIG. 1 shows a schematic view of an atomizer according to an embodiment of the present application;
description of the component numbering
100 an atomizer;
10 a piezoelectric substrate;
20 pairs of resonators;
21 a first interdigital transducer; 22 a second interdigital transducer; 23 a first shorting gate; 24 a second shorting gate;
30 surface acoustic wave oscillator circuits; 31 a signal amplifying circuit; 32 phase shifting network;
40 a liquid guiding component; 41 a drainage channel; 42 a liquid-permeable structure;
50 atomization zone.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. While the description of the present application will be described in conjunction with the preferred embodiments, this is not intended to limit the features of the present invention to that embodiment. Rather, the intention of implementing the novel features described in connection with the embodiments is to cover all alternatives, modifications and equivalents that may be included within the spirit and scope of the claims of the present application. In the following description, numerous specific details are included to provide a thorough understanding of the present application. The present application may be practiced without these particulars. Moreover, some of the specific details have been omitted from the description in order to avoid obscuring or obscuring the focus of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The present application provides a nebulizer 100 comprising: a piezoelectric substrate 10, a counter-resonator 20, a shorting bar, a surface acoustic wave oscillator circuit 30, and an atomizing area 50. The piezoelectric substrate 10 may be made of quartz, lithium niobate, lithium tantalate, a silicon wafer, or the like. The opposite resonator 20 includes a first interdigital transducer 21 and a second interdigital transducer 22, the first interdigital transducer 21 and the second interdigital transducer 22 being disposed on the piezoelectric substrate 10 in parallel with each other; the material of the interdigital transducer can adopt aluminum, copper, gold, platinum and the like. A shorting bar is symmetrically disposed outside the resonator, and as shown in fig. 1, the shorting bar includes a first shorting bar 23 and a second shorting bar 24 for reflecting the surface acoustic wave toward the atomization region. Surface acoustic wave oscillator circuit 30 is operative to cause a self-oscillating signal to be generated for resonator 20. The atomization zone 50 is formed between the first interdigital transducer 21 and the second interdigital transducer 22.
In this embodiment, the direction of signal propagation is, for example: the electric signal generated by the excitation of the first interdigital transducer 21 of the resonator 20 is conducted to the second interdigital transducer 22 through the surface acoustic wave oscillator circuit 30, the electric signal is converted into the surface acoustic wave through the second interdigital transducer 22 and propagates along the piezoelectric substrate 10, the surface acoustic wave passes through the atomization zone 50 and returns to the first interdigital transducer 21, at the moment, the surface acoustic wave is converted into the electric signal through the first interdigital transducer 21 again, and enters the surface acoustic wave oscillator circuit 30 again, and the process is repeated. Likewise, the signal may also propagate in the direction completely opposite to the above example, that is, the first interdigital transducer 21 may also receive the electrical signal excited by the second interdigital transducer 22 and conducted through the surface acoustic wave oscillator circuit 30 to be converted into a surface acoustic wave, and the surface acoustic wave is returned to the second interdigital transducer 22 through the nebulizer 50 to be converted into an electrical signal again, and the process is repeated. That is, the SAW circuit 30 and the resonator 20 together form a closed loop signal path. Since the resonator 20 is self-excited to oscillate, it is not necessary to use an additional signal source to generate a desired frequency signal, which not only simplifies the overall circuit design, but also prevents signals of other frequencies that may be generated by an externally input signal source, thereby improving the energy utilization rate.
Further, the surface acoustic wave oscillator circuit 30 may specifically include a signal amplification circuit 31 and a phase shift network 32. The gain of the signal amplification circuit 31 can compensate the loss in the surface acoustic wave propagation and atomization process, the loss of the interdigital transducer and the conversion loss between the signal amplification circuit and the interdigital transducer; the phase shifting network 32 is used to adjust the phase of the signal to generate a self-oscillating signal for the resonator 20, and the phase shifting network 32 may be composed of adjustable capacitors and inductors connected in series/parallel.
In the embodiment of the present application, the signal amplification circuit 31 can satisfy the phase condition of oscillation initiation: a is LP + LB + LC, phi D + phi E is 2n pi; wherein, A is the gain of the signal amplifying circuit, LP is the surface acoustic wave transmission and atomization loss, LB is the loss of the interdigital transducer, LC is the conversion loss between the signal amplifying circuit and the interdigital transducer, PhiD is the phase shift of the surface acoustic wave oscillator circuit, and PhiE is the phase shift of the signal amplifying circuit and the phase shift network.
In any of the embodiments of the present application, the distance between the first interdigital transducer 21 and the second interdigital transducer 22, which are closest to each other, is 10 to 10000 times the wavelength corresponding to the resonance frequency of the resonator 20 itself. Under this condition, the surface acoustic wave can form a standing wave in the atomization region 50 to enhance the vibration amplitude and improve the atomization efficiency.
The atomizer 100 provided by the present application further comprises a liquid guiding member 40 for guiding the liquid to be atomized into the atomization zone 50, wherein the liquid guiding member 40 comprises a liquid guiding channel 41 and a liquid permeating structure 42. One end of the liquid guiding channel 41 is communicated with the liquid, the other end is communicated with the liquid seepage structure 42, and the liquid guiding channel 41 can be made of metal, carbon fiber, plastic, quartz and other materials. The liquid-permeable structure 42 is disposed adjacent to the atomization zone 50 and is used for guiding the liquid passing through the liquid guide channel 41 into the atomization zone 50.
In addition, the present application also provides an electronic cigarette, which may include the atomizer formed by any one or a combination of the above embodiments.
Example 1
As shown in fig. 1, the atomizer 100 according to the present embodiment includes:
a piezoelectric substrate 10 of 36 ° LiTaO3。
The resonator 20 includes a first interdigital transducer 21 and a second interdigital transducer 22, and the first interdigital transducer 21 and the second interdigital transducer 22 are disposed on the piezoelectric substrate 10 in parallel with each other. The width of each interdigital of the first interdigital transducer 21 and the second interdigital transducer 22 is 5 μm, and the vibration frequency is 200 MHz; the first interdigital transducer 21 and the second interdigital transducer 22 are spaced from the nearest interdigital edge by 1cm, and the value of the distance is 500 times the wavelength of the pair of resonators 20; the metal fingers for resonator 20 are all aluminum.
And shorting bars, which are disposed on the piezoelectric substrate 10 and symmetrically disposed outside the opposite resonator 20, are denoted as a first shorting bar 23 and a second shorting bar 24 in this embodiment.
The surface acoustic wave oscillator circuit 30 includes a signal amplifying circuit 31 and a phase shift network 32. The signal amplification circuit 31 adopts PSA4-5043 radio frequency amplifier, and the function is to supplement the energy lost by the oscillation atomization so as to ensure that the surface acoustic wave used for atomization is kept at the set intensity. The phase shift network 32 is an L-type network composed of inductors and capacitors, and mainly functions to generate a self-excited oscillation signal for the resonator 20 by adjusting the phase of the signal.
An atomizing area 50 formed between the first interdigital transducer 21 and the second interdigital transducer 22 on the piezoelectric substrate 10, into which smoke liquid is atomized by high-frequency vibration.
The liquid guiding component 40, including the liquid guiding channel 41 and the liquid permeating structure 42, is used for guiding the smoke liquid into the atomizing area 50. The liquid guide channel 41 is a capillary suction pipe, one end of which is communicated with liquid, and the other end of which is communicated with the liquid seepage structure 42; the liquid-permeable structure 42 is disposed near the atomizing area 50 for guiding the liquid in the liquid-guiding passage 41 into the atomizing area 50.
When the nebulizer 100 is in operation:
the saw oscillator circuit 30 satisfies the phase condition for oscillation initiation to generate a self-oscillation signal to the resonator 20. At this time, the electric signal generated by the excitation of the first interdigital transducer 21 of the resonator 20 is conducted to the second interdigital transducer 22 through the signal amplification circuit 31 and the phase shift network 32, the electric signal is converted into a surface acoustic wave by the second interdigital transducer 22 and propagates along the piezoelectric substrate 10, the surface acoustic wave returns to the first interdigital transducer 21 through the atomization zone 50, and the surface acoustic wave is converted into an electric signal by the first interdigital transducer 21 again and reenters the signal amplification circuit 31. Similarly, the first interdigital transducer 21 can also receive the electric signal excited by the second interdigital transducer 22 and conducted by the surface acoustic wave oscillator circuit 30, convert the electric signal into a surface acoustic wave, and return to the second interdigital transducer 22 through the atomizer 50 to convert the electric signal into the electric signal again, and the circulation is such that the electric signal can propagate in the direction opposite to the propagation direction of the signal. That is, the SAW circuit 30 and the resonator 20 together form a closed loop signal path.
The tobacco juice is drawn in through the capillary suction tube, passes through the liquid-permeable structure 42, enters the atomization zone 50, and is atomized by high-frequency vibration. According to the parameter selection of the resonator 20 of the embodiment, the surface acoustic wave can form a standing wave in the atomization region 50 to enhance the vibration amplitude and improve the atomization efficiency.
The electronic cigarette provided by the present application uses the atomizer 100 provided in embodiment 1 of the present application.
Table 1 shows the atomization effect contrast of the electron cigarette that adopts this application's atomizer and traditional electrical heating atomizer, ordinary surface acoustic wave atomizer. It can be seen that the atomizer of the present application can obtain equivalent or better atomization effect under the condition of lower energy consumption, and has significant technical effect.
Table 1 comparison of atomization effect of atomization scheme of the present application with other atomization schemes
| Power (W) | Aerosol collection amount (mg/100 port) | |
| The atomization scheme of the present application | 9 | 251 |
| Electrically heated atomization scheme | 27 | 240 |
| Surface acoustic wave atomization scheme | 12 | 194 |
While the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the present application, and the present application is not intended to be limited to these details. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the present application.
Claims (8)
1. An atomizer, comprising
A piezoelectric substrate;
a resonator including a first interdigital transducer and a second interdigital transducer, the first interdigital transducer and the second interdigital transducer being disposed on the piezoelectric substrate in parallel with each other;
the short circuit grids are symmetrically arranged on the outer sides of the pair of resonators;
a surface acoustic wave oscillator circuit for causing self-oscillation to the resonator;
and the atomization area is formed between the first interdigital transducer and the second interdigital transducer.
2. A nebulizer as claimed in claim 1, wherein the surface acoustic wave oscillator circuit comprises:
the phase shifting network enables the pair of resonators to generate self-oscillation signals by adjusting the phase of the signals; and
and the signal amplifying circuit is used for keeping the surface acoustic wave at a set strength.
3. A nebulizer as claimed in claim 2, wherein the phase condition of the onset of self-oscillation to the resonator and saw oscillator circuit is:
A>LP+LB+LC，φD+φE＝2nπ；
wherein, A is the gain of the signal amplifying circuit, LP is the surface acoustic wave transmission and atomization loss, LB is the loss of the interdigital transducer, LC is the conversion loss between the signal amplifying circuit and the interdigital transducer, PhiD is the phase shift of the surface acoustic wave oscillator circuit, and PhiE is the phase shift of the signal amplifying circuit and the phase shift network.
4. The nebulizer of claim 1, wherein the first interdigital transducer and the second interdigital transducer are spaced from the nearest interdigital electrode by a distance of 10 to 10000 times the wavelength corresponding to the resonance frequency of the resonator itself.
5. The nebulizer of claim 1, further comprising a liquid conducting member for conducting liquid into the nebulizing region, the liquid conducting member comprising:
one end of the liquid guide channel is communicated with liquid, and the other end of the liquid guide channel is communicated with the liquid seepage structure;
the liquid seepage structure is close to the atomization zone and used for guiding the liquid passing through the liquid guide channel into the atomization zone.
6. A nebulizer as claimed in claim 1, wherein the material of the interdigital transducer is selected from one of aluminum, copper, gold, and platinum.
7. A nebulizer as claimed in claim 1, wherein the piezoelectric substrate is made of a material selected from one of quartz, lithium niobate, lithium tantalate, and a silicon wafer.
8. An electronic cigarette, comprising the nebulizer of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120667918.7U CN214854370U (en) | 2021-04-01 | 2021-04-01 | Atomizer and contain its electron cigarette |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120667918.7U CN214854370U (en) | 2021-04-01 | 2021-04-01 | Atomizer and contain its electron cigarette |
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| CN214854370U true CN214854370U (en) | 2021-11-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114468394A (en) * | 2022-02-15 | 2022-05-13 | 哈勃智能传感(深圳)有限公司 | Resonant frequency extraction method, driving method and atomization system |
| WO2023249390A1 (en) * | 2022-06-23 | 2023-12-28 | Kt & G Corporation | Aerosol generating module and aerosol generating device |
-
2021
- 2021-04-01 CN CN202120667918.7U patent/CN214854370U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114468394A (en) * | 2022-02-15 | 2022-05-13 | 哈勃智能传感(深圳)有限公司 | Resonant frequency extraction method, driving method and atomization system |
| WO2023249390A1 (en) * | 2022-06-23 | 2023-12-28 | Kt & G Corporation | Aerosol generating module and aerosol generating device |
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