CN101167438A - Low-frequency ultrasonic atomizing cultivator - Google Patents
Low-frequency ultrasonic atomizing cultivator Download PDFInfo
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- CN101167438A CN101167438A CNA2007101906615A CN200710190661A CN101167438A CN 101167438 A CN101167438 A CN 101167438A CN A2007101906615 A CNA2007101906615 A CN A2007101906615A CN 200710190661 A CN200710190661 A CN 200710190661A CN 101167438 A CN101167438 A CN 101167438A
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- atomizing
- nutrient solution
- atomizer
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- guide channel
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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
- B05B17/0623—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 coupled with a vibrating horn
- B05B17/063—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 coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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- Special Spraying Apparatus (AREA)
- Hydroponics (AREA)
Abstract
The invention belongs to cultivation apparatus of the field of agricultural engineering, which comprises an ultrasonic atomizer which is an atomizing spray cap, a power pump, a nutrient solution tank, a solution feeding conduit, a reflux conduit, a glass groove, a planting plate and the like, wherein the atomizing spray cap comprises two couples of piezo-electricity discs which are clamped inside a metallic titanium shell, the four pressed piezo-electricity discs act as one pole of high-frequency electric source input, the metallic shell acts as the other pole, an atomizing face is arranged at the opening of a muzzle, a metallic ball which is used to adjust suspending clearance is arranged on the atomizing face, the structure of the atomizing face is a double curved surface, a flow passage extends to the atomizing face, and the diameter of the metallic ball is 4-79mm. The length of the muzzle of the atomizing spray cap is equal to the wave length of a compression wave, and the vibration amplitude of the outlet of the muzzle is equal to plural micrometers. The invention adjusts the size of nutrient solution droplets by changing the clearance between the ball and the radiating surface of a focusing ultrasonic transducer. The invention is simple in structure, high in reliability, low in production costs and able to realize high power to further realize large atomizing quantity.
Description
Technical field:
The invention belongs to the cultivating device in agricultural engineering field, refer in particular to a kind of low-frequency ultrasonic atomizing cultivator.
Background technology:
Atomising cultivation is that the aerosol training is a kind of novel pattern in the cultivation technique without soil.The aerosol training is that the root system of plant is placed a kind of cultivation mode of growing, growing under the aerosol environment that is formed by nutrient solution fully.It satisfies the demand of root system of plant to liquid manure by the aqueous vapor of atomizing, and obtains the most sufficient oxygen.Root system is grown under this environment, without any the influence of mechanical resistance, thereby root system is free to stretch.It has faster than other any methods of cultivation growth, management is more convenient, throw the littler characteristics of worker, it will become a kind of important planting type of the future of agriculture in producing.
The atomising cultivation device is as the core apparatus of aerial fog cultivation, and its performance directly influences the effect of aerial fog cultivation.But so far, seldom there is document to relate to its Research on Working both at home and abroad.Sichuan Xichang College developed a kind of high frequency ultrasound atomising cultivation device in 2005, and its operating frequency is 1.65MHz.
[1]The high frequency atomizing is directly to utilize the ultrasonic of high-frequency generator generation with the atomization of liquid.Hyperacoustic transmission is according to the sine curve longitudinal propagation, and promptly one deck is strong, a little less than one deck, transmits successively.When weak acoustic signals acts on liquid, then can produce certain negative pressure, thereby a large amount of spaces can appear in liquid internal to liquid, intermolecular force is destroyed simultaneously, and liquid dispersion is come, and realizes the atomizing of liquid.The mist droplet particle size that this kind atomizing type produces is about about 10 μ m, if wanting to produce more tiny droplet then need increase operating frequency, but the increase of operating frequency need reduce the thickness of piezoelectric ceramic piece, causes processing difficulties.
Existing ultrasonic atomizing cultivator has following deficiency:
1. atomization quantity is little.Because the transducer architecture of this type atomizer is a thin slice, be difficult to realize high-power, thereby limited its atomization quantity.Strengthen atomization quantity, must increase atomizer quantity, cost significantly increases.
2. the poor reliability of ultrasonic transducer.Because transducer architecture is a sheet metal, and long-term work very easily produces fatigue fracture at the dither state.
3. the droplet size is non-adjustable, is unfavorable for studying the relation of root growth and nutrition droplet size.The droplet size computing formula of this type atomizer is suc as formula (1).As can be seen, operating frequency determines that its droplet size has also been determined.
D＝0.34(8πT/(ρf
2))
1/3 (1)
In the formula (1), T is a surface tension coefficient; ρ is a fluid density; F is a frequency of sound wave.
4. be difficult to produce ultra-fine droplet.According to theoretical result of calculation, produce the droplet of 1 micron of particle diameter, the thickness of transducer is 0.3mm, obviously no matter this thickness still from strength reliability is considered from making angle, all has very big problem.
Summary of the invention:
The present invention is intended to invent that a kind of atomization quantity is big, high reliability, droplet adjustable size, can produce ultra-fine droplet and cheap serial low-frequency ultrasonic atomizing cultivation.
For achieving the above object, designed a kind of serial low-frequency ultrasonic atomizing cultivator of brand new, its driving frequency utilizes ultrasonic nozzle with the atomization of liquid between the 20K-100K hertz.
Operation principle of the present invention is: when liquid is ejected into the surface of solids of a fast vibration, will form the wavy fluid film of one deck at the surface of solids.Along with the increase of solid Oscillation Amplitude, liquid film surface wave amplitude also increases.When liquid film surface wave amplitude increased to certain value, the top of ripple will become unstable and break, and ejected a large amount of tiny vaporific drops from the surface of solids.
The present invention is that atomizer, kinetic pump, nutrient solution case, feeding pipeline, reflux line, glass guide channel, field planting plate etc. are formed by ultrasonic atomizer.Described atomizer is actually a resonance device, it is made up of two pairs of piezoelectric discs that are clipped in the titanium shell, atomizing face is positioned at nozzle exit, the Metal Ball of regulating levitation gap is positioned on the atomizing face, the version of atomizing face is hyperboloid, runner extends to atomizing face always, and the Metal Ball diameter is 4～79 millimeters.Four utmost points that the piezoelectric disc that compresses is imported as high frequency electric source, metal shell is as another utmost point.When the polarity at the two poles of the earth back and forth changed with high-frequency input signal, piezoelectric disc will vibrate with the frequency identical with input signal, and the pressure waves that vibration produces to propagation, causes that nozzle-end takes place and the vibration of input signal same frequency along nozzle shaft.The nozzle length of design just in time equals the wavelength of a pressure wave, and pressure wave forms the standard wave pattern in the stack and the resonance that come back reflective build-up of pressure ripple of two end faces of nozzle.Because free-ended boundary condition restriction, crest is positioned at two ends of nozzle.The size of resonance amplitude is relevant with the diameter of shell, because the diameter of jet expansion end housing diminishes, thereby the amplitude of resonance is exaggerated, and port of export amplitude is far longer than the arrival end amplitude, and the amplitude of increase equates with the variation of nozzle diameter.According to the needs of atomizing, the pressure wave amplitude is minimum should to amplify 6～8 times, and the diameter of jet expansion end housing is 5～80 millimeters, and the amplitude of nozzle exit end vibration has the 0-10 micron, and the version of atomizing face is hyperboloid.
Under the radiated sound field effect of focusing ultrasonic transducer, Metal Ball is suspended, thereby forms a gap in the radiating surface and the Metal Ball of focusing ultrasonic transducer.The nutrient solution droplet after the broken atomizing, is extruded through the gap between ball and the focusing ultrasonic transducer radiating surface by the ultrasonic vibration of curved surface at the radiating surface place of focusing ultrasonic transducer, realizes secondary-atomizing.Have only the droplet of 0-6 μ m size could pass through this gap, form ultra-fine droplet.By changing the density of driving voltage or ball, can change the gap between ball and the focusing ultrasonic transducer radiating surface, make nutrient solution droplet adjustable size.Simultaneously, because this atomizer adopts Langevin sandwich structure, it is simple in structure, reliability is high, the processing and manufacturing cost is low, it is high-power to realize, thereby realizes big atomization quantity.
In sum, the present invention is that a kind of atomization quantity is big, high reliability, droplet adjustable size, can produces ultra-fine droplet and cheap serial low-frequency ultrasonic atomizing cultivator.
Description of drawings:
The novel low-frequency ultrasonic atomizatio shower nozzle that Fig. 1 proposes for the present invention.
Fig. 2 atomising cultivation device of the present invention basic structure schematic diagram.
1, Metal Ball 2, atomizing face 3, runner 4, amplification conversion 5, piezoelectric disc 6, high frequency input 7, kinetic pump 8, nutrient solution case 9, reflux line 10, glass guide channel 11, field planting hole 12, field planting plate 13, feeding pipeline 14, atomizer 15, supersonic signal generator 16, bracing frame
Embodiment:
The present invention is a kind of atomising cultivation device that utilizes the exploitation of low-frequency ultrasonic atomizing principle, and as shown in Figure 2, it comprises kinetic pump 7, nutrient solution case 8, reflux line 9, glass guide channel 10, field planting hole 11, field planting plate 12, feeding pipeline 13, atomizer 14 etc.Kinetic pump 7 one ends link to each other with nutrient solution case 9, the other end links to each other with atomizer 14 through feeding pipeline 13, glass guide channel 10 bottoms link to each other with nutrient solution case 8 through reflux line 9, lay the atomizing pipeline and the atomizer 14 that sprays up be installed at 10 ends of glass guide channel, the top is provided with the field planting plate, for ease of observing, adopts the cultivating groove of glass guide channel as the aerosol training, the bottom surface of glass guide channel is done and is formed difference in height in echelon, is beneficial to the backflow of nutrient solution and recycling.Keep somewhere of backflow and the collection of nutrient solution return port at the end that glass guide channel is low-lying slightly to be used for nutrient solution, and a screen pack is installed near the aperture to prevent hole plug, lay the atomizing pipeline and the atomizer that sprays up is installed in bottom land, buckle the field planting plate then, beat field planting hole by the cultivation requirement on the field planting plate.Again the nutrient solution case is embedded in the soil after building up cultivation system, is beneficial to equilibrium temperature.Behind the good and sound nutrition case, join a kinetic pump again as the nutrient liquid atomizing circulating pump, nutrient solution circulation is just by the startup of pump and close and carry out during work.Wherein the structure of atomizer 14 as shown in Figure 1, it is made up of two pairs of piezoelectric discs that are clipped in the titanium shell, four piezoelectric discs that compress are as utmost points of high frequency electric source input, metal shell is as another utmost point; Atomizing face is positioned at nozzle exit, and the version of atomizing face is hyperboloid, and runner extends to atomizing face always, and the Metal Ball of regulating levitation gap is positioned on the atomizing face, and the Metal Ball diameter is 4～79 millimeters.The nozzle length of atomizer 14 is the wavelength of a pressure wave, and the diameter of jet expansion end housing is 5～80 millimeters, and the version of atomizing face is hyperboloid.
Claims (3)
1. low-frequency ultrasonic atomizing cultivator, it comprises kinetic pump (7), nutrient solution case (8), reflux line (9), glass guide channel (10), field planting plate (12), feeding pipeline (13), atomizer (14), kinetic pump (7) one ends link to each other with nutrient solution case (8), the other end links to each other through the runner of feeding pipeline (13) with atomizer (14), glass guide channel (10) bottom links to each other with nutrient solution case (8) through reflux line (9), lay the atomizing pipeline and the atomizer (14) that sprays up be installed at glass guide channel (10) end, the top is provided with field planting plate (12), it is characterized in that described atomizer (14) is made up of two pairs of piezoelectric discs that are clipped in the titanium shell, atomizing face is positioned at nozzle exit, the Metal Ball (1) of regulating levitation gap is positioned on the atomizing face, the version of atomizing face is hyperboloid, Metal Ball (1) diameter is the 4-79 millimeter, four utmost points that the piezoelectric disc that compresses is imported as high frequency electric source, metal shell is as another utmost point; The nozzle length of atomizer (8) is the wavelength of a pressure wave, and the diameter of jet expansion end housing is 5～80 millimeters.
2. low-frequency ultrasonic atomizing cultivator according to claim 1 is characterized in that doing as the bottom surface of the glass guide channel (10) of aerial fog cultivation groove forming difference in height in echelon.
3. low-frequency ultrasonic atomizing cultivator according to claim 1 is characterized in that keeping somewhere the nutrient solution return port of the backflow and the collection that are used for nutrient solution at the low-lying end of glass guide channel (10), and near the aperture screen pack is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101906615A CN101167438B (en) | 2007-11-28 | 2007-11-28 | Low-frequency ultrasonic atomizing cultivator |
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| CN2007101906615A CN101167438B (en) | 2007-11-28 | 2007-11-28 | Low-frequency ultrasonic atomizing cultivator |
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| CN101167438A true CN101167438A (en) | 2008-04-30 |
| CN101167438B CN101167438B (en) | 2010-06-16 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966661A (en) * | 2010-07-08 | 2011-02-09 | 苏州科技学院 | Ultrasonic focused vapor fog cooler |
| CN102480924A (en) * | 2009-08-18 | 2012-05-30 | 株式会社农友社 | Spray culture device |
| CN102676386A (en) * | 2011-03-07 | 2012-09-19 | 中国科学院过程工程研究所 | Ultrasonic low frequency-high frequency coupled atomization biological reaction device |
| CN102784738A (en) * | 2012-07-06 | 2012-11-21 | 江苏大学 | Low-frequency ultrasonic atomizing spray nozzle with large atomization amount |
| CN102918954A (en) * | 2012-11-21 | 2013-02-13 | 汪盛松 | Overlap-type seed incubator |
| CN103433169A (en) * | 2013-07-11 | 2013-12-11 | 江苏大学 | Medium-frequency ultrasonic atomization spray nozzle for Gaussian complex angle and design method of medium-frequency ultrasonic atomization spray nozzle |
| CN104885854A (en) * | 2015-05-08 | 2015-09-09 | 天津泰达盐碱地绿化研究中心有限公司 | Coastal high-saline-alkali area tree root system growth regulation method |
| CN104904572A (en) * | 2015-05-14 | 2015-09-16 | 江苏大学 | Low-frequency ultrasonic underground mist irrigation machine |
| CN104923436A (en) * | 2015-05-26 | 2015-09-23 | 江苏大学 | Low-frequency ultrasonic triple atomization nozzle |
| CN105728254A (en) * | 2016-04-01 | 2016-07-06 | 江苏大学 | Low-frequency electrostatic ultrasonic atomization nozzle |
| CN105957572A (en) * | 2016-06-28 | 2016-09-21 | 长江勘测规划设计研究有限责任公司 | Ultrasonic air filter for underground nuclear power station |
| CN109042274A (en) * | 2018-07-24 | 2018-12-21 | 江苏大学 | A kind of package root system precisely spraying ultrasonic atomizatio cultivation case and its method |
| CN113950243A (en) * | 2019-04-12 | 2022-01-18 | 莱蒂斯格罗有限公司 | Air planting equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6739518B1 (en) * | 1999-12-21 | 2004-05-25 | E. I. Du Pont De Nemours And Company | Spray applicator |
-
2007
- 2007-11-28 CN CN2007101906615A patent/CN101167438B/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480924A (en) * | 2009-08-18 | 2012-05-30 | 株式会社农友社 | Spray culture device |
| CN101966661A (en) * | 2010-07-08 | 2011-02-09 | 苏州科技学院 | Ultrasonic focused vapor fog cooler |
| CN102676386A (en) * | 2011-03-07 | 2012-09-19 | 中国科学院过程工程研究所 | Ultrasonic low frequency-high frequency coupled atomization biological reaction device |
| CN102676386B (en) * | 2011-03-07 | 2014-06-04 | 中国科学院过程工程研究所 | Ultrasonic low frequency-high frequency coupled atomization biological reaction device |
| CN102784738A (en) * | 2012-07-06 | 2012-11-21 | 江苏大学 | Low-frequency ultrasonic atomizing spray nozzle with large atomization amount |
| CN102784738B (en) * | 2012-07-06 | 2015-12-09 | 江苏大学 | A kind of low-frequency ultrasonic atomizing shower nozzle of large atomization quantity |
| CN102918954A (en) * | 2012-11-21 | 2013-02-13 | 汪盛松 | Overlap-type seed incubator |
| CN103433169A (en) * | 2013-07-11 | 2013-12-11 | 江苏大学 | Medium-frequency ultrasonic atomization spray nozzle for Gaussian complex angle and design method of medium-frequency ultrasonic atomization spray nozzle |
| CN103433169B (en) * | 2013-07-11 | 2015-09-02 | 江苏大学 | A kind of mid-frequency ultrasonic atomizer of Gauss's complex angle and method for designing thereof |
| CN104885854A (en) * | 2015-05-08 | 2015-09-09 | 天津泰达盐碱地绿化研究中心有限公司 | Coastal high-saline-alkali area tree root system growth regulation method |
| CN104904572B (en) * | 2015-05-14 | 2017-05-31 | 江苏大学 | Mist filling device a kind of low frequency ultrasound |
| CN104904572A (en) * | 2015-05-14 | 2015-09-16 | 江苏大学 | Low-frequency ultrasonic underground mist irrigation machine |
| CN104923436A (en) * | 2015-05-26 | 2015-09-23 | 江苏大学 | Low-frequency ultrasonic triple atomization nozzle |
| CN105728254A (en) * | 2016-04-01 | 2016-07-06 | 江苏大学 | Low-frequency electrostatic ultrasonic atomization nozzle |
| CN105957572A (en) * | 2016-06-28 | 2016-09-21 | 长江勘测规划设计研究有限责任公司 | Ultrasonic air filter for underground nuclear power station |
| CN109042274A (en) * | 2018-07-24 | 2018-12-21 | 江苏大学 | A kind of package root system precisely spraying ultrasonic atomizatio cultivation case and its method |
| CN109042274B (en) * | 2018-07-24 | 2020-11-20 | 江苏大学 | Ultrasonic atomization cultivation box capable of wrapping root system and spraying accurately and method thereof |
| CN113950243A (en) * | 2019-04-12 | 2022-01-18 | 莱蒂斯格罗有限公司 | Air planting equipment |
| US11877547B2 (en) | 2019-04-12 | 2024-01-23 | LeftUs Grow Ltd | Aeroponics apparatus |
| CN113950243B (en) * | 2019-04-12 | 2024-02-09 | 莱蒂斯格罗有限公司 | Air planting equipment |
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| CN101167438B (en) | 2010-06-16 |
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