CN104209221B - A kind of low frequency bending vibration formula twice ultrasonic atomizer - Google Patents
A kind of low frequency bending vibration formula twice ultrasonic atomizer Download PDFInfo
- Publication number
- CN104209221B CN104209221B CN201410478181.9A CN201410478181A CN104209221B CN 104209221 B CN104209221 B CN 104209221B CN 201410478181 A CN201410478181 A CN 201410478181A CN 104209221 B CN104209221 B CN 104209221B
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- Prior art keywords
- spray chamber
- inlet channel
- baffle plate
- bending vibration
- low frequency
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
- B05B17/0646—Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0615—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced at the free surface of the liquid or other fluent material in a container and subjected to the vibrations
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- Special Spraying Apparatus (AREA)
Abstract
The invention discloses a kind of low frequency bending vibration formula twice ultrasonic atomizer, comprise spray chamber, piezoelectric vibrator, fixed head, baffle plate disk, circuit arrangement case, check valve etc.; Piezoelectric vibrator comprises piezoelectric ceramics and metal disk, and its outside is surrounded by rubber ring, be fixedly mounted in fixed head and with circuit arrangement case in dc source electrically connect; Described inlet channel is fixed on spray chamber left side wall, and its water side is aperture 1mm; Described baffle plate disk is as thin as a wafer arranged on inlet channel water side, and after baffle plate disk, is mounted with the support at 30 °, angle of inclination, is not more than 30 ° for limiting the angle that masking foil disc upwards rotates. In described circuit arrangement case, be mounted with micro-circuit board, and offer external circuit connecting hole at spray chamber right-hand member, be convenient to connect power supply. The present invention overcomes existing low-frequency ultrasonic atomizing device inefficiency, circuit and atomizer heating seriously and is difficult to generate the defects such as ultra-fine droplet, can be applicable to atomising cultivation, agriculture humidification, medicament nebulae inhalation.
Description
Technical field
The present invention relates to ultrasonic atomizer, refer in particular to a kind of low frequency bending vibration formula twice ultrasonic atomizer.
Background technology
Ultrasonic atomizatio has that droplet is tiny, size distribution evenly, the advantage such as the relatively large and liquid conveying pressure of height rounding property, atomization quantity is low, therefore, ultrasonic atomizatio is widely used in the aspects such as atomising cultivation, agriculture humidification, medicament nebulae inhalation and semiconductor etching. Ultrasonic atomizer mainly contains dividing of high frequency (operating frequency is greater than 1MHz) and low frequency (operating frequency 20～80kHz). High frequency ultrasound atomizer exists that reliability is low, stream time is short, high to water quality requirement, can not atomization high viscosity liquid, atomization quantity is little and unstable and change the shortcomings such as working media chemical constitution, thereby its application prospect is greatly limited. Low-frequency ultrasonic atomizing utensil has that atomization quantity is large and stable, reliability is high, water quality is not required and the advantage such as destruction work chemical construction of medium not, and in agricultural spray field, (as atomising cultivation, foliage dressing and plant protection spraying) is with a wide range of applications. But, low-frequency ultrasonic atomizing shower nozzle is mostly the low-frequency ultrasonic atomizing device with luffing rod-type at present, it exists that driving voltage is high, inefficiency, circuit and shower nozzle heating is serious, volume is difficult to more greatly generate the shortcomings such as ultra-fine droplet, and its application prospect is subject to larger restriction. The problem existing in order to solve low-frequency ultrasonic atomizing shower nozzle, the present invention designs that a kind of driving voltage is low, operating efficiency is high, volume is little and can generate the low frequency bending vibration formula ultrasonic atomizer of the specific dimensions of ultra-fine droplet.
Summary of the invention
For Shortcomings in prior art, the invention provides a kind of low frequency bending vibration formula ultrasonic atomizer.
In order to solve above technical problem, the concrete technical scheme that the present invention adopts is as follows:
A kind of low frequency bending vibration formula twice ultrasonic atomizer, is characterized in that: comprise spray chamber (14), piezoelectric vibrator (16), fixed head (15), baffle plate disk (19), water tank (11), inlet channel (9), circuit arrangement case (12) and check valve (20); Described spray chamber (14) is fixedly mounted on fixed head (15) upper end upper and spray chamber (14) and is provided with small fog hole, aperture 3-4 μ m;
Described inlet channel (9) water side is provided with baffle plate disk (19) as thin as a wafer, and baffle plate disk (19) upper end 3rd/4th, material is No. 20 steel sheet metals (21), thickness is 0.006mm, lower end 1/4th is masking foil disc (23), and thickness is 0.005mm; Sheet metal (21) bonds by mucilage binding bonding strip (22) with masking foil disc (23); Baffle plate disk (19) is mounted with the support at 30 °, angle of inclination below, is not more than 30 ° for limiting the angle that masking foil disc (23) upwards rotates;
Described piezoelectric vibrator (16) comprises piezoelectric ceramics (4) and metal disk (5); The outside of piezoelectric vibrator (16) is surrounded by rubber ring (17), and piezoelectric vibrator (16) is fixedly mounted in fixed head (15) and electrically connects with the dc source in the circuit arrangement case (12) of spray chamber (14) upper end, right side; Described inlet channel (9) is arranged on spray chamber (14) left side wall, and the water side of inlet channel (9) is connected with spray chamber, and described water side aperture 1mm, taking the moisture film that ensures to produce in spray chamber as 1-2mm;
Described check valve (20) is del shape, can not go out spray chamber (14) to ensure current can only enter spray chamber (14); It is upper that check valve (20) is directly installed on water tank (11) by cylindrical right angle draw-in groove (18), and check valve (20) connects the water inlet end of inlet channel (9) by ring flange (10); Micro-circuit board is fixedly mounted in circuit arrangement case (12), and offers external circuit connecting hole at spray chamber (14) right-hand member, is convenient to connect power supply.
Described piezoelectric vibrator (16) comprises metal disk (5) and piezoelectric ceramics (4), described piezoelectric ceramics (4) is annular shape, be positioned at metal disk (5) downside, and metal disk (5) and piezoelectric ceramics (4) are connected respectively positive pole, the negative pole of dc source.
Specifically being of a size of of described piezoelectric ceramics (4): outer dia 11mm, inside diameter 5mm, thickness 0.55mm; Specifically being of a size of of metal disk (5): diameter 20mm, thickness 0.15mm, and material properties is No. 20 steel.
Described spray chamber (14), water tank (11) are rectangle cavity.
The core apparatus of low frequency bending vibration formula twice ultrasonic atomizer of the present invention is piezoelectric vibrator, adopts the piezoelectric ceramic piece of radial vibration, replaces the piezoelectric ceramic piece of original axial vibration. And described atomizer is first-order bending vibration, be different from the high-order flexural vibrations of other atomizers. Its vibration frequency is 33790Hz.
The present invention has beneficial effect.
1, the present invention is by setting the dimensional parameters of piezoelectric vibrator, make atomizer is that vibration frequency is the single order Pure Bending Vibration state of 33790Hz in the time of work, thereby in the time that atomizer is normally worked, thereby the area that has greatly increased atomization face has greatly increased atomization quantity.
2, the present invention is by being provided with small fog hole in spray chamber upper end, and aperture is 3 ~ 4 μ m, and the droplet that is only less than or equal to this size could spray. When the grain size low-frequency ultrasonic atomizing device that is same frequency 1/15th to 1/20th time, broken through the technical bottleneck that low-frequency ultrasonic atomizing is difficult to generate ultra-fine droplet.
3, gently letter of overall structure of the present invention, greatly low production cost, has improved reliability.
Brief description of the drawings
Fig. 1 is low frequency bending vibration formula twice ultrasonic atomizer operation principle sketch of the present invention.
Fig. 2 is low frequency bending vibration formula twice ultrasonic atomizer profile of the present invention.
Fig. 3 is low frequency bending vibration formula twice ultrasonic atomizer top view of the present invention.
Fig. 4 is low frequency bending vibration formula twice ultrasonic atomizer local structural graph of the present invention.
In figure: 1-droplet, the piezoelectric atomizer 1 after 2-distortion, 3-micropore, 4-piezoelectric ceramics, 5-metal disk, 6-clamping device, the piezoelectric atomizer 2 after 7-distortion, 8-fog hole, 9-inlet channel, 10-ring flange, 11-water tank, 12-circuit arrangement case, 13-power line, 14-spray chamber, 15-fixed head, 16-piezoelectric vibrator, 17-rubber ring, the circular right angle of 18-draw-in groove, 19-baffle plate disk, 20-check valve, 21-sheet metal, 22-mucilage binding bonding strip, 23-masking foil disc.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
Fig. 1 is low frequency bending vibration formula ultrasonic atomizer operation principle sketch. Wherein piezoelectric ceramics 4 is a kind of novel functional materials, supply with alternating voltage by driving power, make piezoelectric ceramics 4 produce the first-order bending vibration of hundreds thousand of times per second, thereby drive metal disk 5 ceaselessly to vibrate, there is minimum micropore 3 central area of metal disk 5. Thereby liquid is ceaselessly patted, water is sprayed from micropore 3, ensured the size of droplet 1 and the atomization quantity hourly of ejection.
Fig. 2, Fig. 3 are the profile of a kind of embodiment of low frequency bending vibration formula ultrasonic atomizer of the present invention. Low frequency bending vibration formula ultrasonic atomizer is the low-frequency ultrasonic atomizing device taking piezoelectric vibrator 16 as core apparatus, comprises spray chamber 14, piezoelectric vibrator 16, fixed head 15, baffle plate disk 19, water tank 11, inlet channel 9, circuit arrangement case 12, check valve 20. It is characterized in that, described spray chamber 14 is arranged on fixed head 15, is connected by screw device with fixed head 15; Described piezoelectric vibrator 16 comprises piezoelectric ceramics 4 and metal disk 5, and outside is surrounded by rubber ring 17, is arranged in fixed head 15 and electrically connects with the dc source of spray chamber 14 upper ends, right side; Described inlet channel 9 is arranged on spray chamber 14 left side walls by nut bolt, the about 1mm in its aperture, water side; Described check valve 20 is directly installed on water tank 11 by cylindrical right angle draw-in groove 18, and connects inlet channel 9; Described circuit arrangement case 12 is by nut, micro-circuit board to be fixed in circuit arrangement case 12, and is provided with external circuit connecting hole at spray chamber 14 right-hand members, is convenient to connect power supply.
Fig. 4 is low frequency bending vibration formula ultrasonic atomizer local structural graph of the present invention. This baffle plate disk 19 is as thin as a wafer arranged on inlet channel 9 water sides, and baffle plate disk 19 upper ends 3rd/4th, and material is No. 20 steel sheet metals 21, and thickness is 0.006mm, and lower end 1/4th is masking foil disc 23, and thickness is 0.005mm. Sheet metal 21 bonds by mucilage binding bonding strip 22 with masking foil disc 23. Baffle plate disk 19 is mounted with the support at 30 °, angle of inclination below, in order to fixed support baffle plate disk 19.
Described piezoelectric vibrator 16 comprises that metal disk 5 and piezoelectric ceramics 4 form, described piezoelectric ceramics 4 be annular, be positioned at metal disk 5 downsides, metal disk 5 and piezoelectric ceramics 4 are connected respectively positive pole, the negative pole of dc source.
In addition, being specifically of a size of of described ring piezoelectric pottery 4: outer dia 11mm, inside diameter 5mm, thickness 0.55mm, being specifically of a size of of metal disk 5: diameter 20mm, thickness 0.15mm, and material properties is No. 20 steel. This size can ensure the first-order bending vibration that low frequency bending vibration formula atomizer is 33790Hz in operating frequency in the time of normal work, and operating efficiency is high.
Described fixed head 15 is provided with four cylindrical right angle draw-in grooves 18, and four hex bolts and hex nut are evenly installed, and is convenient to fixedly mount piezoelectric vibrator 16.
Described spray chamber 14 is rectangle cavitys, and upper end is provided with small fog hole, aperture approximately 3 ~ 4 μ m.
Described inlet channel 9 is arranged on spray chamber 14 left side walls by nut bolt, and its aperture, water side 1mm, in the time that atomizer is normally worked, can form the moisture film of 1-2mm, ensures the work that atomizer can continue.
Described water tank 11 is rectangle cavitys, is fixed check valve 20 is installed by cylindrical right angle draw-in groove.
Described check valve 20 is connected with inlet channel 9 by ring flange 10, and by hex nut, bolt is fixedly mounted on water tank 11 walls, and check valve 20 is del shape, ensures that current can only enter and can not go out.
Particularly, in the present embodiment, being specifically of a size of of described ring piezoelectric pottery 4: outer dia 16mm, inside diameter 7.8mm, thickness 0.6mm, being specifically of a size of of metal disk 5: diameter 20mm, thickness 0.15mm, and material properties is No. 20 steel. This size can ensure low frequency bending vibration formula atomizer in the time of normal work in first-order bending vibration, operating efficiency is high.
The course of work of the present inventionFor: after atomizer energising, when metal disk 5 vibration downwards, in spray chamber 14, because increasing, volume forms vacuum, cause forming draught head between spray chamber 14 and inlet channel 9, make the masking foil disc 21 as thin as a wafer of baffle plate disk 19 lower ends open to the water side of inlet channel 9 angle that is less than 30 °, thereby make liquid in water tank 11 under the effect of check valve 20, by inlet channel 9, liquid is entered in spray chamber 14 via inlet channel 9, form the moisture film of 1 ~ 2mm. Piezoelectric ceramics 4 radial vibrations, drive metal disk 5 with operating frequency extensional vibration, do not stop to pat moisture film by metal disk 5, thereby make moisture film produce atomization. When metal disk 5 upwards vibrates, spray chamber 14 is interior due to smaller volume, make to form draught head between spray chamber 14 and inlet channel 9, make the masking foil disc 21 as thin as a wafer of baffle plate disk 19 lower ends recover plumbness, the wall of droplet 1 high-speed impact spray chamber 14 with fog hole in spray chamber 14, realize secondary-atomizing, (aperture 3 ~ 4 μ m) droplet in aperture go out injected to be less than fog hole 8. Thereby the droplet 1 of avoiding atomizer atomization to produce enters into inlet channel 9.
Preferably, when piezoelectric vibrator 16 is fixed on fixed head 15, between piezoelectric vibrator 16 and fixed head 15, leave gap, make piezoelectric vibrator 16 in the time of work, have the space of enough radial vibrations, can normally work; Be surrounded by rubber ring 17 in piezoelectric vibrator 16 outsides, with the noise that reduces to produce when piezoelectric vibrator is worked.
This described embodiment is preferred embodiment of the present invention; but invention is not limited to above-mentioned embodiment; in the situation that not deviating from flesh and blood of the present invention, any apparent improvement, replacement or modification that those skilled in the art can make all belong to protection scope of the present invention.
Claims (4)
1. a low frequency bending vibration formula twice ultrasonic atomizer, is characterized in that: comprise spray chamber (14), piezoelectric vibrator (16), fixed head (15), baffle plate disk (19), water tank (11), inlet channel (9), circuit arrangement case (12) and check valve (20); Described spray chamber (14) is fixedly mounted on fixed head (15) upper end upper and spray chamber (14) and is provided with small fog hole, aperture 3-4 μ m;
Described inlet channel (9) water side is provided with baffle plate disk (19) as thin as a wafer, and baffle plate disk (19) upper end 3rd/4th, material is No. 20 steel sheet metals (21), thickness is 0.006mm, lower end 1/4th is masking foil disc (23), and thickness is 0.005mm; Sheet metal (21) bonds by mucilage binding bonding strip (22) with masking foil disc (23); Baffle plate disk (19) is mounted with the support at 30 °, angle of inclination below;
Described piezoelectric vibrator (16) comprises piezoelectric ceramics (4) and metal disk (5); The outside of piezoelectric vibrator (16) is surrounded by rubber ring (17), and piezoelectric vibrator (16) is fixedly mounted in fixed head (15) and electrically connects with the dc source in the circuit arrangement case (12) of spray chamber (14) upper end, right side; Described inlet channel (9) is arranged on spray chamber (14) left side wall, and the water side of inlet channel (9) is connected with spray chamber, described water side aperture 1mm;
Described check valve (20) is del shape; It is upper that check valve (20) is directly installed on water tank (11) by cylindrical right angle draw-in groove (18), and check valve (20) connects the water inlet end of inlet channel (9) by ring flange (10); Micro-circuit board is fixedly mounted in circuit arrangement case (12), and offers external circuit connecting hole at spray chamber (14) right-hand member.
2. a kind of low frequency bending vibration formula twice ultrasonic atomizer according to claim 1, it is characterized in that: described piezoelectric vibrator (16) comprises metal disk (5) and piezoelectric ceramics (4), described piezoelectric ceramics (4) is annular shape, be positioned at metal disk (5) downside, and metal disk (5) and piezoelectric ceramics (4) are connected respectively positive pole and the negative pole of dc source.
3. a kind of low frequency bending vibration formula twice ultrasonic atomizer according to claim 1, is characterized in that: described piezoelectric ceramics (4) is for circular, and it is specifically of a size of: outer dia 11mm, inside diameter 5mm, thickness 0.55mm; Specifically being of a size of of metal disk (5): diameter 20mm, thickness 0.15mm, and material properties is No. 20 steel.
4. a kind of low frequency bending vibration formula twice ultrasonic atomizer according to claim 1, is characterized in that: described spray chamber (14), water tank (11) are rectangle cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478181.9A CN104209221B (en) | 2014-09-19 | 2014-09-19 | A kind of low frequency bending vibration formula twice ultrasonic atomizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478181.9A CN104209221B (en) | 2014-09-19 | 2014-09-19 | A kind of low frequency bending vibration formula twice ultrasonic atomizer |
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| CN104209221A CN104209221A (en) | 2014-12-17 |
| CN104209221B true CN104209221B (en) | 2016-05-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104621082B (en) * | 2015-01-26 | 2017-01-18 | 华南农业大学 | Standing wave resonant piezoelectric mist spraying device and method |
| CN108722767B (en) * | 2018-07-25 | 2023-10-20 | 泉州市小新智能科技有限公司 | Spraying device |
| CN112044668A (en) * | 2020-09-03 | 2020-12-08 | 桐乡清锋科技有限公司 | Leadless piezoelectric atomization element and vibrating sieve hole type atomizer |
| CN113184971B (en) * | 2021-04-12 | 2022-03-08 | 东南大学 | Catalytic device, preparation method thereof and piezoelectric ultrasonic degradation equipment adopting catalytic device |
| CN114308504B (en) * | 2021-12-16 | 2023-05-05 | 江苏大学 | Piezoelectric low-frequency ultrasonic nanometer atomizer and application method thereof |
| CN115007387B (en) * | 2022-06-16 | 2023-06-20 | 广州大学 | Piezoelectric atomizer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58139757A (en) * | 1982-02-16 | 1983-08-19 | Matsushita Electric Ind Co Ltd | Atomizer |
| JPS5973072A (en) * | 1982-10-19 | 1984-04-25 | Matsushita Electric Ind Co Ltd | Atomizer |
| JP2008207057A (en) * | 2007-02-23 | 2008-09-11 | Mitsubishi Electric Corp | Ultrasonic atomizing device and equipment provided with the same |
| JP5261077B2 (en) * | 2008-08-29 | 2013-08-14 | 大日本スクリーン製造株式会社 | Substrate cleaning method and substrate cleaning apparatus |
| CN202290429U (en) * | 2011-10-19 | 2012-07-04 | 邓以翔 | Metal atomizing piece |
| CN103418520B (en) * | 2013-09-03 | 2016-01-20 | 江苏大学 | A kind of medium frequency ultrasonic atomizer |
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