CN114345613A - Magnetoelectric alternating-current electrostatic ultrasonic atomization spray head and working method - Google Patents
Magnetoelectric alternating-current electrostatic ultrasonic atomization spray head and working method Download PDFInfo
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- CN114345613A CN114345613A CN202111494570.7A CN202111494570A CN114345613A CN 114345613 A CN114345613 A CN 114345613A CN 202111494570 A CN202111494570 A CN 202111494570A CN 114345613 A CN114345613 A CN 114345613A
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- 238000000889 atomisation Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007921 spray Substances 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 230000005415 magnetization Effects 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims description 26
- 230000005284 excitation Effects 0.000 claims description 15
- 230000003116 impacting effect Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007670 refining Methods 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 238000007590 electrostatic spraying Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 241000883990 Flabellum Species 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
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- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention discloses a magnetoelectric alternating current electrostatic ultrasonic atomization spray head and a working method, belonging to the field of spraying machinery, and comprising a Laval tube, wherein the side wall of the front end of the Laval tube is provided with an air inlet pipe, and the side wall of the tail end of the Laval tube is provided with a liquid inlet pipe; gas is accelerated to atomize liquid sprayed from the liquid inlet pipe in the Laval pipe, the charging electrode is arranged at the outlet end of the Laval pipe, the charging electrode enables the atomized liquid to be charged, the charged liquid drops enter the magnetization resonant cavity to obtain charged magnetic liquid drops, and the charged magnetic liquid drops are sprayed out through the liquid outlet hole. Laval, turbofan flabellum cutting and electrostatic spraying are used for improving atomization amount, the effect of refining the fog drops for many times is achieved, the fog drops are charged after passing through the charging electrodes, the fog drops are effectively adsorbed on plants, and the utilization rate of the medicine is improved.
Description
Technical Field
The invention relates to the field of spraying machinery, in particular to a magnetoelectric alternating-current electrostatic ultrasonic atomizing nozzle and a working method.
Background
At present, various types of nozzles are widely applied in the field of agricultural engineering, and particularly, a plurality of parts worth deep research are arranged on the aspect of ultrasonic atomization technology; the piezoelectric type atomizing spray head has the advantages that the diameter of droplets is small, a good refining effect is achieved, but the piezoelectric type atomizing spray head has the defect that poor adhesion and small atomizing amount are difficult to meet large-area pesticide application; while the conventional mechanical atomizing nozzle has a sufficiently large atomizing amount, the droplets have a large diameter and are less adhesive.
Therefore, the current technology has the following problems: firstly, the condition of small diameter of fog drops is met, but the quantity of the fog drops cannot be reached; and secondly, under the condition of having the fog drop quantity, the diameter requirement of the fog drops cannot be met. The prior art has also improved upon the above problems, such as with electro-acoustic transducers and hydrokinetic atomizing nozzles, but still falls short of practical needs.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the magnetoelectric alternating current electrostatic ultrasonic atomizing nozzle which is used for improving the atomizing amount by utilizing Laval, turbofan blade cutting and electrostatic spraying to achieve the effect of refining fog drops for multiple times, the fog drops are charged after passing through a charging electrode, so that the fog drops are effectively adsorbed on plants, and the utilization rate of medicines is improved.
The present invention achieves the above-described object by the following technical means.
A magnetoelectric alternating current electrostatic ultrasonic atomization nozzle comprises a Laval tube, wherein an air inlet tube is arranged on the side wall of the front end of the Laval tube, and a liquid inlet tube is arranged on the side wall of the tail end of the Laval tube; gas is accelerated to atomize liquid sprayed from the liquid inlet pipe in the Laval pipe, the charging electrode is arranged at the outlet end of the Laval pipe, the charging electrode enables the atomized liquid to be charged, the charged liquid drops enter the magnetization resonant cavity to obtain charged magnetic liquid drops, and the charged magnetic liquid drops are sprayed out through the liquid outlet hole.
Further, the outlet end of the laval tube is provided with a turbofan blade, and the turbofan blade further breaks up the atomized liquid drops; and a charging electrode is arranged on the turbofan blade.
Furthermore, a reducing pipe is arranged at the outlet end of the laval pipe through a flange plate and is communicated with the flow guide pipe, and a magnetization resonant cavity is arranged at the tail end of the flow guide pipe.
Furthermore, a metal vibrator is arranged in the magnetization resonant cavity, and an excitation coil is arranged outside the magnetization resonant cavity; the excitation coil is communicated with an alternating current power supply.
Furthermore, the inlet diameter of the Laval pipe is 8-10 mm, the throat diameter is 2.2-2.6 mm, and the outlet diameter is 8-10 mm.
Furthermore, the liquid outlet hole is formed in the side wall of the flow guide pipe.
Furthermore, the turbofan fan blades are fixedly supported by a fixing frame.
The working method of the magnetoelectric alternating current electrostatic ultrasonic atomization nozzle comprises the following steps:
the compressed air flow enters the Laval tube through the air inlet pipe and is accelerated to supersonic speed, and the supersonic speed air flow atomizes the liquid entering through the liquid inlet pipe;
atomized liquid passes through a charging electrode so that liquid drops are positively charged, charged liquid drop groups enter a magnetizing resonant cavity, the charged liquid drop groups enter the magnetizing resonant cavity and impact a high-frequency vibrating metal vibrator to generate secondary crushing, meanwhile, the liquid drops perform cutting magnetic induction line motion in the magnetizing resonant cavity so that the liquid drops are magnetized, and the magnetized liquid drop groups returned after impacting the magnetizing resonant cavity are discharged from a liquid outlet. The invention has the beneficial effects that:
1. the air inlet pipe is connected with the airflow output part of the air compressor, the liquid inlet is connected with the water pump, compressed air flows through the Laval pipe to be accelerated to supersonic speed, and the supersonic speed airflow and liquid flow are atomized for one time in the Laval expanding section.
2. The atomized liquid drops are broken by a fan blade of a turbofan, and the broken liquid drop groups are charged to make the liquid drops carry positive charges; meanwhile, the compressed air flow entering through the air inlet pipe is sucked in at an accelerated speed along with the high-speed rotation of the fan blades of the turbofan.
3. The magnetic field generated by the exciting current after the exciting coil is connected with the high-frequency alternating current interacts with the induced eddy current in the metal oscillator, the electromagnetic field generated by the exciting coil changes along with the frequency change of the alternating current so as to change the electromagnetic force borne by the metal oscillator, the metal oscillator keeps a high-frequency vibration relationship in the cavity due to the self gravity of the metal oscillator and the change of the borne electromagnetic force, and the high-frequency vibration metal oscillator further refines the charged liquid drop group and makes the charged liquid drop group magnetized.
4. The supersonic speed liquid drop group enters a magnetization resonant cavity and impacts a metal vibrator with high frequency oscillation to generate secondary crushing, the crushed liquid drop group impacts the bottom of the magnetization resonant cavity and then is crushed again, meanwhile, the liquid drop performs magnetic induction line cutting motion in the magnetization resonant cavity to magnetize the liquid drop, and the returned magnetized high-speed liquid drop group after impacting the magnetization resonant cavity is discharged from a liquid outlet.
Drawings
FIG. 1 is a schematic structural diagram of a magnetoelectric AC electrostatic ultrasonic atomizer;
FIG. 2 is a schematic view of the Laval tube flow line of FIG. 1 according to the present invention;
FIG. 3 is a front view of the present invention as it relates to the magnetizing resonator of FIG. 1;
FIG. 4 is a front view of the fan blade of the turbofan according to the present invention.
The reference numbers are as follows:
2, an air inlet pipe; 3-a fixing frame; 4-laval tubes; 5-a liquid inlet pipe; 6-a charging electrode; 7-a flow guide pipe; 8-a metal vibrator; 9-a field coil; 10-an alternating current power supply; 11-a magnetizing resonant cavity; 12-liquid outlet holes; 13-turbofan blades; 14-a flange plate; 15-a fixed frame; 19-rolling bearing.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A magnetoelectric alternating current electrostatic ultrasonic atomization nozzle comprises a Laval tube 4, wherein an air inlet tube 2 is arranged on the side wall of the front end of the Laval tube 4, and a liquid inlet tube 5 is arranged on the side wall of the tail end of the Laval tube 4; gas is accelerated to atomize liquid sprayed from the liquid inlet pipe 5 in the Laval pipe 4, the charging electrode 5 is arranged at the outlet end of the Laval pipe 4, the charging electrode 6 enables the atomized liquid to be charged, the charged liquid drops enter the magnetization resonant cavity 11 to obtain charged and magnetized liquid drops, and the charged and magnetized liquid drops are sprayed out through the liquid outlet hole 12.
The outlet end of the Laval tube 4 is provided with a turbofan fan blade 13, and the turbofan fan blade 13 further breaks up the atomized liquid drops; the turbofan blade 13 is provided with a charging electrode 5.
The reducing pipe is arranged at the outlet end of the laval pipe 4 through a flange 14 and communicated with the flow guide pipe 2, and the tail end of the flow guide pipe 2 is provided with a magnetization resonant cavity 11.
A metal vibrator 8 is arranged in the magnetization resonant cavity 11, and an excitation coil 9 is arranged outside the magnetization resonant cavity 11; the excitation coil 9 is in communication with an ac power supply 10.
The inlet diameter of the Laval pipe 4 is 8-10 mm, the throat diameter is 2.2-2.6 mm, and the outlet diameter is 8-10 mm.
The liquid outlet holes 12 are formed in the side wall of the flow guide pipe 2.
The turbofan blade 13 is fixedly supported by the fixing frame 3.
The working method of the magnetoelectric alternating current electrostatic ultrasonic atomization nozzle comprises the following steps:
compressed airflow enters the Laval tube 4 through the air inlet tube 2 and is accelerated to supersonic speed, and the supersonic speed airflow atomizes liquid entering through the liquid inlet tube 5;
the atomized liquid passes through the charging electrode 6 so that the liquid drops are positively charged, the charged liquid drop group enters the magnetization resonant cavity 11 and collides with the high-frequency vibrating metal vibrator 8 to be secondarily crushed, meanwhile, the liquid drops perform cutting magnetic induction line motion in the magnetization resonant cavity 11 so that the liquid drops are magnetized, and the magnetized liquid drop group returning after impacting the magnetization resonant cavity 11 is discharged from the liquid outlet 12.
Referring to the attached drawing 1, a magnetoelectric alternating current electrostatic ultrasonic atomization nozzle comprises an air inlet pipe 2, a fixing frame 3, a laval pipe 4, a liquid inlet pipe 5, a charging electrode 6, a flow guide pipe 7, a metal vibrator 8, an excitation coil 9, an alternating current power supply 10, a magnetization resonant cavity 11, a liquid outlet hole 12, a turbofan fan blade 13, a flange 14, a fixing frame 15 and a rolling bearing 19.
The air inlet pipe 2 is arranged at the opening position of the Laval pipe 4, the fixing frame 3 is arranged in an inner space defined by the air inlet pipe 2 and the throat of the Laval pipe 4, a liquid inlet pipe 5 is arranged on the side wall of the Laval pipe 4, the outlet end of the Laval pipe 4 is connected with the left end of the turbofan blade 13, and the right end of the turbofan blade 13 is connected with the charging electrode 6;
the metal vibrator 8 is arranged in the magnetization resonant cavity 11, the surface of a fixing frame used by the metal vibrator 8 is coated with an insulating material, the metal vibrator 8 is wound by an excitation coil 9, and the other end of the excitation coil 9 is connected with an alternating current power supply 10.
A fixing frame 15 is arranged between the liquid inlet pipe 5 and the turbofan blade 13. The liquid outlet hole 12 is arranged at the lower side of the draft tube 7 at the left side end of the magnetization resonant cavity 11.
With reference to the attached figure 2, the laval pipe flow line is schematically shown, the diameter of an air inlet of the laval pipe 4 is 6-8 mm, the diameter of a throat is 2.2-2.6 mm, and the diameter of an air outlet of the laval pipe is 5-7 mmThe side wall of the Laval tube is provided with a liquid inlet tube, under the normal working state, the speed of the air flow is subsonic when passing through a contraction stage, the speed reaches sonic speed when passing through a throat, namely an acceleration stage, and the speed is supersonic when entering an expansion stage until reaching an outlet. The differential expression of the mass continuity equation of the gas flow unit body in the Laval pipe 4 shows that: ρ uA ═ is constant (ρ + d ρ) (u + du) (a + dA), where ρ is density, u is fluid velocity, and a is cross-sectional area; then, according to the relation between the air velocity and the flow passage sectional area, there is a formula
M is the Mach number of the air flow, and the formula shows that when the air flow is subsonic and M is less than 1, if du is more than 0, dA is less than 0; if du < 0, dA > 0. The above description shows that when the subsonic gas flow moves along the streamline of the laval pipe in an accelerating way, the fluid sectional area is necessarily gradually reduced; when flowing at supersonic speed, M > 1, if du > 0, dA > 0; if du < 0, dA < 0. The above description shows that when the supersonic gas flow moves along the streamline of the laval pipe 4 with acceleration, the cross-sectional area of the flow must be increased slowly, and the supersonic flow is opposite to the subsonic flow. In summary, the effect is best when the mach number M of the gas flow at the throat of the laval pipe 4 is 1.
The liquid inlet pipe 5 is arranged on the side wall of the Laval pipe 4, the left end opening position of the Laval pipe 4 is provided with the air inlet pipe 2, the fixing frame 3 is arranged in an inner space defined by the air inlet pipe 2 and the throat of the Laval pipe 4, the right end of the Laval pipe 4 is connected with the left end of the turbofan blade 13, the side wall of the Laval pipe 4 is provided with the liquid inlet pipe 5, the fixing frame 15 is arranged at the middle position of the liquid inlet 5 and the turbofan blade 13, and a gap formed by the air inlet pipe 2, the Laval pipe 4 and the fixing frame 3 is used for ensuring the smooth circulation of liquid; the metal vibrator 8 is arranged in the middle of the magnetizing resonant cavity 11, one end of the excitation coil 9 is connected with the metal vibrator 8, and the other end of the excitation coil 9 is connected with the alternating current power supply 10; the diameter of the air inlet pipe 2 is 13-15 mm, the length of the air inlet pipe is 30-33 mm, the diameter of an inlet of the laval pipe 4 is 8-10 mm, the diameter of a throat of the laval pipe 4 is 2.2-2.6 mm, the diameter of an outlet of the laval pipe is 8-10 mm, a liquid inlet pipe 5 is arranged on the side wall of the laval pipe 4, the diameter of the liquid inlet pipe 5 is 5-7 mm, the length of the liquid inlet pipe is 30-33 mm, one end of the turbofan blade 13 is fixedly connected with the outlet of the laval pipe 4, the charging electrode 6 is connected with the turbofan blade 13, the flow guide pipe 7 is connected with a reducing pipe, the diameter of a central through hole of the flow guide pipe 7 is 8-10 mm, the length of the flow guide pipe is 35-38 mm, the metal vibrator 8 is installed in the magnetization resonant cavity 11, the metal vibrator 8 is wound by the excitation coil 9, and the other end of the excitation coil 9 is connected with the alternating current power supply 10.
The working process of the magnetoelectric alternating-current electrostatic ultrasonic atomizing nozzle according to the embodiment of the invention comprises the following steps:
according to the invention, through the Laval tube, the liquid drop charging part and the magnetization resonant cavity, firstly, the air inlet pipe 2 is connected with the airflow output part of the air compressor, the liquid flow inlet is connected with the water pump, the compressed air is accelerated to supersonic speed through the Laval tube 4, and the supersonic airflow and the liquid flow are atomized once in the Laval expansion section. The turbofan blade 13 breaks up the liquid drops, the broken liquid drop group is charged with electric charges to enable the liquid drops to be charged with positive electric charges, and meanwhile, the compressed air flow at the air flow inlet is sucked in at high speed along with the high-speed rotation of the turbofan blade 13. After the excitation coil 9 is connected with high-frequency alternating current, a magnetic field generated by excitation current interacts with induced eddy currents in the metal oscillator 8, the electromagnetic field generated by the excitation coil 8 changes along with the frequency change of alternating current so as to change the electromagnetic force borne by the metal oscillator 8, and the metal oscillator 8 keeps a high-frequency vibration relationship in the cavity due to the self gravity of the metal oscillator 8 and the change of the borne electromagnetic force. The supersonic speed liquid drop group enters a magnetization resonant cavity and impacts a metal vibrator with high frequency oscillation to generate secondary crushing, the crushed liquid drop group impacts the bottom of a magnetization resonant cavity 11 and then is crushed again, meanwhile, the liquid drop carries out cutting magnetic induction line motion in the magnetization resonant cavity 11 to enable the liquid drop to be magnetized, and the magnetized high-speed liquid drop group returning after impacting the magnetization resonant cavity 11 is discharged from a liquid outlet 12.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (8)
1. A magnetoelectric alternating current electrostatic ultrasonic atomization nozzle is characterized by comprising a Laval tube (4), wherein an air inlet tube (2) is arranged on the side wall of the front end of the Laval tube (4), and a liquid inlet tube (5) is arranged on the side wall of the tail end of the Laval tube; gas is accelerated to atomize liquid sprayed from the liquid inlet pipe (5) in the Laval pipe (4), the charging electrode (5) is arranged at the outlet end of the Laval pipe (4), the charging electrode (6) enables the atomized liquid to carry charges, the charged liquid drops enter the magnetization resonant cavity (11) to obtain charged liquid drops, and the charged liquid drops are sprayed out through the liquid outlet holes (12).
2. The magnetoelectric alternating-current electrostatic ultrasonic atomizer according to claim 1, wherein the outlet end of the laval tube (4) is provided with a turbofan blade (13), and the turbofan blade (13) further breaks up the atomized liquid droplets; and a charging electrode (5) is arranged on the turbofan blade (13).
3. The magnetoelectric alternating-current ultrasonic atomizer according to claim 1, wherein a reducer is installed at the outlet end of the laval tube (4) through a flange (14), the reducer is communicated with the flow guide tube (2), and the magnetization resonant cavity (11) is arranged at the end of the flow guide tube (2).
4. The magnetoelectric alternating-current ultrasonic atomizer according to claim 3, wherein a metal vibrator (8) is disposed in the magnetization resonant cavity (11), and a field coil (9) is disposed outside the magnetization resonant cavity (11); the excitation coil (9) is communicated with an alternating current power supply (10).
5. The magnetoelectric alternating-current ultrasonic atomizer according to claim 1, wherein the inlet diameter of the laval tube (4) is 8 to 10mm, the throat diameter is 2.2 to 2.6mm, and the outlet diameter is 8 to 10 mm.
6. The magnetoelectric ac-electrostatic ultrasonic atomizer according to claim 1, wherein the liquid outlet holes (12) are provided in the side wall of the flow guide tube (2).
7. The magnetoelectric ac electrostatic ultrasonic atomizer of claim 1, wherein the turbofan blade (13) is fixedly supported by a fixing frame (3).
8. The method of operating a magnetoelectric ac ultrasonic atomizer according to any one of claims 1 to 7, comprising the steps of:
compressed airflow enters the Laval tube (4) through the air inlet tube (2) and is accelerated to supersonic speed, and the supersonic speed airflow atomizes liquid entering through the liquid inlet tube (5);
atomized liquid passes through a charging electrode (6) so that liquid drops are positively charged, charged liquid drop groups enter a magnetizing resonant cavity (11), the charged liquid drop groups enter the magnetizing resonant cavity (11) and impact a high-frequency vibrating metal vibrator (8) to be secondarily crushed, meanwhile, the liquid drops are magnetized by cutting magnetic induction lines in the magnetizing resonant cavity (11), and the returned magnetized liquid drop groups after impacting the magnetizing resonant cavity (11) are discharged from a liquid outlet hole (12).
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| CN202111494570.7A CN114345613B (en) | 2021-12-08 | 2021-12-08 | Magnetoelectric alternating-current electrostatic ultrasonic atomization spray head and working method |
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| CN1693221A (en) * | 2005-04-26 | 2005-11-09 | 迟景强 | Liquid magnetizating apparatus |
| WO2013028084A1 (en) * | 2011-08-25 | 2013-02-28 | Przemysłowy Instytut Maszyn Rolniczych | Spraying method and spray head comprising a laval nozzle and an annular induction electrode |
| CN104209499A (en) * | 2013-05-29 | 2014-12-17 | 宝山钢铁股份有限公司 | Low frequency pulsed magnet field fine-grain solidification method for causing melt oscillation through electromagnetic force |
| CN209565118U (en) * | 2019-01-23 | 2019-11-01 | 福建农林大学 | A kind of enhanced gas-liquid two-phase flow static nozzle |
| CN111346751A (en) * | 2020-03-19 | 2020-06-30 | 江苏大学 | Magnetoelectric low-voltage electrostatic ultrasonic atomization spray head |
| CN111495626A (en) * | 2020-06-05 | 2020-08-07 | 斯诺美冰雪(北京)科技有限公司 | Supersonic speed snow making nozzle and supersonic speed indoor snow making machine comprising same |
-
2021
- 2021-12-08 CN CN202111494570.7A patent/CN114345613B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693221A (en) * | 2005-04-26 | 2005-11-09 | 迟景强 | Liquid magnetizating apparatus |
| WO2013028084A1 (en) * | 2011-08-25 | 2013-02-28 | Przemysłowy Instytut Maszyn Rolniczych | Spraying method and spray head comprising a laval nozzle and an annular induction electrode |
| CN104209499A (en) * | 2013-05-29 | 2014-12-17 | 宝山钢铁股份有限公司 | Low frequency pulsed magnet field fine-grain solidification method for causing melt oscillation through electromagnetic force |
| CN209565118U (en) * | 2019-01-23 | 2019-11-01 | 福建农林大学 | A kind of enhanced gas-liquid two-phase flow static nozzle |
| CN111346751A (en) * | 2020-03-19 | 2020-06-30 | 江苏大学 | Magnetoelectric low-voltage electrostatic ultrasonic atomization spray head |
| CN111495626A (en) * | 2020-06-05 | 2020-08-07 | 斯诺美冰雪(北京)科技有限公司 | Supersonic speed snow making nozzle and supersonic speed indoor snow making machine comprising same |
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