CN111438026B - Driving method of ultrasonic atomizer - Google Patents
Driving method of ultrasonic atomizer Download PDFInfo
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- CN111438026B CN111438026B CN202010215942.7A CN202010215942A CN111438026B CN 111438026 B CN111438026 B CN 111438026B CN 202010215942 A CN202010215942 A CN 202010215942A CN 111438026 B CN111438026 B CN 111438026B
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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
- B05B17/0653—Details
- B05B17/0669—Excitation frequencies
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
- B05B12/06—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for effecting pulsating flow
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/081—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to the weight of a reservoir or container for liquid or other fluent material; responsive to level or volume of liquid or other fluent material in a reservoir or container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The invention discloses a driving method of an ultrasonic atomizer, 1) the atomizer drives an atomizing sheet to work at a certain central frequency F0; 2) adding a frequency of more than 16KHZ on the basis of the central frequency F0 to obtain a central frequency F1, using the central frequency F1 and then 0KHZ-30KHZ as central frequencies F2, using the central frequency F2 and then 0KHZ-30KHZ as central frequencies F3, using the central frequency F3 and then 0KHZ-30KHZ as central frequencies F4, and using the central frequency F4 and then 0KHZ-30KHZ as central frequencies F5; 3) the atomizer first finds its center frequency F0 and operates for a period of time, and then operates from the center frequency F5 to the center frequency F1 for a period of time, and thus operates back and forth. Therefore, the atomization water level depth of the atomizer can be improved to the maximum extent, the height of an atomization water column is reduced, the noise generated when the atomization water column excites circuit clearance for atomizing is reduced, the working current of the atomizer is reduced, and the atomization amount of different atomization water level depths is balanced.
Description
Technical Field
The invention relates to the technical field of ultrasonic atomizers, in particular to a driving method of a separate-excitation type ultrasonic generator.
Background
The ultrasonic atomizer is applied in many occasions, and because the ultrasonic atomizer carries out mist quantity regulation, mist quantity control and water level depth control through an exciting circuit, the control methods are not perfect at present, and a gap spraying method is generally adopted, namely spraying for a period of time and stopping spraying for a period of time. The disadvantage is that the noise is generated, and the water level depth which can be atomized is reduced along with the increase of the duty ratio of the gap spraying. In addition, at present, a water supplementing tank is not added, and a method of adding a floating energy gathering cover is adopted to supplement and correct the defect that atomization amounts of different water levels of a traditional atomizer are different. In order to obtain a higher atomization water level and a larger atomization amount, the larger the atomization water level depth (the distance between the water surface and the atomization sheet), the higher the water column height of the atomizer (the height between the water surface) is, so that the water column of the atomizer needs a larger atomization space, and the volume of the humidifier can be increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a driving method of an ultrasonic atomizer, which can improve the atomization water level depth of the atomizer to the maximum extent, reduce the height of an atomization water column, reduce the noise generated when the atomization water column excites circuit clearance to spray, reduce the working current of the atomizer and balance the atomization amount of different atomization water level depths.
In order to solve the technical problems, the invention adopts the following technical scheme: a driving method of an ultrasonic atomizer, characterized in that: the method is realized by the following steps of,
1) the atomizer drives the atomizing plate to work at a certain central frequency F0 through a driving circuit of the atomizer, wherein the central frequency F0 is the main frequency of the atomizer, and the atomizer can generate effective atomizing amount;
2) adding a frequency of more than 16KHZ on the basis of the central frequency F0 to obtain a central frequency F1, using the central frequency F1 and then 0KHZ-30KHZ as central frequencies F2, using the central frequency F2 and then 0KHZ-30KHZ as central frequencies F3, using the central frequency F3 and then 0KHZ-30KHZ as central frequencies F4, and using the central frequency F4 and then 0KHZ-30KHZ as central frequencies F5;
3) the atomizer first finds its center frequency F0 and operates for a period of time (e.g., 10 microseconds to 500 milliseconds, the same applies below), and then operates back and forth in this manner from center frequency F5 to center frequency F1.
The atomizer firstly finds the center frequency F0 of the atomizer and works for a period of time, or stops spraying for a period of time, and then works back and forth according to the process of working at any center frequency or a plurality of center frequencies from the center frequency F5 to the center frequency F1 for a period of time.
The atomizer firstly finds out the central frequency F0 and works for a period of time, or stops spraying for a period of time, and then works at a frequency higher than the central frequency F1, and works back and forth according to the process.
The atomizer first finds its center frequency F0 and operates for a period of time during which the operating frequency of the atomizer can fluctuate up and down around center frequency F0, as well as during operation of the atomizer from center frequency F1 to center frequency F5, the operating frequency of the atomizer can fluctuate up and down around center frequency F1 to center frequency F5.
The atomizer firstly finds the central frequency F0 and works for a period of time, and the time of working at the central frequency F0 is more than 20% of the whole spraying time (without the time of stopping spraying); the atomizer was operated at a frequency greater than F1 for a center frequency of greater than 20% of the total spray time (excluding the time to stop spraying).
The utility model provides a drive circuit of ultrasonic nebulizer, including the control unit and ultrasonic atomization piece, its characterized in that: the ultrasonic atomization device is characterized by further comprising an inductor L and an MOS (metal oxide semiconductor) tube, wherein the inductor L is connected with a power supply VCC, the ultrasonic atomization sheet and the MOS tube are respectively connected with the inductor L, the control unit is connected with the MOS tube, and the MOS tube and the control unit are further connected with a feedback resistor R; the control unit provides an oscillation signal with a certain frequency for the MOS tube, drives the ultrasonic atomization sheet by signal amplification of the MOS tube and the inductor L, determines the driving signal frequency F0 provided by the control unit by feeding back the voltage of the resistor R to the control unit, and the atomizer carries out atomization under the driving of the frequency F0.
Inductance L is two foot formula inductances, and its inside has a set of coil, and power VCC is connected respectively to inductance L's first foot and the one end of ultrasonic atomization piece, and MOS pipe's D utmost point is connected respectively to inductance L's second foot and the other end of ultrasonic atomization piece.
Inductance L is three-legged inductance, and its inside has two sets of coils, and inductance L's first foot VCC that connects, power VCC end or electric capacity C are connected to the one end of ultrasonic atomization piece, and inductance L's second foot is connected with the other end of ultrasonic atomization piece or the D utmost point of MOS pipe, and inductance L's third foot is connected with the other end of ultrasonic atomization piece or the D utmost point of MOS pipe.
Inductance L is four foot formula inductance, and its inside has two sets of coils, and power VCC is connected to inductance L's first foot, and MOS pipe's the D utmost point is connected to inductance L's second foot, and the one end of ultrasonic atomization piece is connected to inductance L's third foot, and the other end of ultrasonic atomization piece is connected to inductance L's fourth foot.
The control unit is a single chip microcomputer chip and an auxiliary circuit thereof, or an atomizer chip and an auxiliary circuit thereof are adopted, and of course, the single chip microcomputer chip and the auxiliary circuit thereof, or the atomizer chip and the auxiliary circuit thereof, can directly utilize the control system of the existing ultrasonic atomizer, so the specific technical scheme of the control unit is not described herein again.
The method and the circuit provided by the invention can achieve the following advantages that firstly, the atomization amount can be well adjusted, and the noise generated by exciting the circuit to intermittently spray and adjust the atomization amount is reduced; secondly, under the condition of achieving practical atomization amount, the working current of the atomizer can be reduced (usually, the power specification of a switching power supply can be reduced by one gear, for example, if a 24V/1.5A switching power supply is used originally, the performance of high-water level atomization and balanced atomization of different water levels can be met by using the 24V/1A switching power supply now), so that the energy consumption and the cost can be reduced; and thirdly, the atomization water level depth of the atomizer can be improved to the maximum extent, the height of an atomization water column is reduced, the atomization water level range is enlarged, and the atomization amount of different water levels is balanced. The energy-gathering cover humidifier is particularly suitable for being applied without adding a water supplementing tank or an energy-gathering cover humidifier, thereby meeting the market demand, reducing the product cost and improving the product performance.
Drawings
FIG. 1 is a schematic diagram of a two-pin inductor L circuit according to the present invention;
FIG. 2 is a first circuit schematic diagram of the three-pin inductor L of the present invention;
FIG. 3 is a schematic diagram of a second circuit of the three-pin inductor L according to the present invention;
FIG. 4 is a schematic diagram of a third circuit of the three-pin inductor L of the present invention;
FIG. 5 is a schematic diagram of a fourth circuit of the three-pin inductor L of the present invention;
fig. 6 is a schematic diagram of a four-pin inductor L circuit according to the present invention.
In the figure, 4 denotes an ultrasonic atomizing sheet, and 5 denotes a control unit.
Detailed Description
The invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings:
embodiment 1, as shown in fig. 1, is a schematic circuit diagram of a two-pin inductor L of an ultrasonic atomization sheet 4 and a driving circuit, where the inductor L is a two-pin inductor and is internally provided with a set of coils, first, a VCC terminal is connected to a power supply, a first pin of the inductor L and one end of the ultrasonic atomization sheet 4 are respectively connected to the VCC terminal, a second pin of the inductor L is connected to the other end of the ultrasonic atomization sheet 4 and a D electrode of an MOS transistor, a control unit 5 is respectively connected to a G electrode of the MOS transistor, an S electrode of the MOS transistor and a first end of a resistor R, and a second end of the resistor R is grounded.
In embodiment 2, as shown in fig. 2 to 5, the inductor L is a three-pin inductor, and two sets of coils are disposed therein;
wherein, as shown in fig. 2 and 3, one end of the ultrasonic atomization piece 4 and the first pin of the inductor L are respectively connected to the VCC terminal to be connected to the power supply, the second pin of the inductor L can be connected to the other end of the ultrasonic atomization piece 4 or the D electrode of the MOS transistor, and the third pin of the inductor L can be connected to the other end of the ultrasonic atomization piece 4 or the D electrode of the MOS transistor. Specifically, as shown in fig. 2, when the second pin of the inductor L is connected to the D-pole of the MOS transistor, the third pin of the inductor L is connected to the other end of the ultrasonic atomization sheet 4; as shown in fig. 3, when the third pin of the inductor L is connected to the D-pole of the MOS transistor, the second pin of the inductor L is connected to the other end of the ultrasonic atomization sheet 4.
As shown in fig. 4 and 5, the first pin of the inductor L is connected to the VCC terminal and connected to the power supply, one end of the ultrasonic atomization sheet 4 is connected to the capacitor C, the other end of the capacitor C is connected to the control unit 5 and the first end of the resistor R, the second end of the resistor R is grounded, and the second pin of the inductor L is connected to the D electrode of the MOS transistor. Specifically, as shown in fig. 4, when one end of the capacitor C is connected to one end of the ultrasonic atomization sheet 4, the other end of the capacitor C is connected to the control unit 5, and the control unit 5 is connected to the S-pole of the MOS transistor; as shown in fig. 5, when one end of the capacitor C is connected to one end of the ultrasonic atomization sheet 4, the other end of the capacitor C is connected to the second end of the resistor R, the second end of the resistor R is grounded, and the control unit 5 is connected to the S-pole of the MOS transistor.
In embodiment 3, as shown in fig. 6, the inductor L is a four-pin inductor, and two sets of coils are disposed inside the inductor L, first, a first pin of the inductor L is connected to a power supply from a VCC terminal, a second pin of the inductor L is connected to a D-pole of the MOS transistor, a third pin of the inductor L is connected to one end of the ultrasonic atomization sheet 4, and a fourth pin of the inductor L is connected to the other end of the ultrasonic atomization sheet 4; the control unit 5 is connected with the G pole and the S pole of the MOS tube, the first end of the resistor R is connected with the S pole of the MOS tube, and the second end of the resistor R is grounded.
The working principle is as follows: the driving circuit is applied to an ultrasonic atomizer (humidifier), is connected with an ultrasonic atomization sheet 4, drives the ultrasonic atomization sheet 4 through signal amplification of an MOS tube and an inductor L by providing an oscillation signal with a certain frequency for a G pole of the MOS tube by the control unit 5, and determines the frequency F0 of a driving signal provided by the control unit 5 through voltage feedback of a resistor R to the control unit 5. The atomizer can generate effective atomization effect under the driving of the frequency of F0. The generated fog amount has a good effect, the height of the water column is high, but proper current, proper atomization amount, proper height of the water column and the atomization amount with different water levels in balance need to be obtained, and the fog amount is realized by the following technology;
first, the drive circuit calculates the center frequencies of F1 to F5 by determining the operating center frequency F0 of the nebulizer.
Based on the center frequency F0, the frequency above 16KHZ is added as the center frequency F1, the atomizer uses the center frequency F1 plus 0KHZ-30KHZ (such as 20KHZ) as the center frequency F2, the atomizer uses the center frequency F2 plus 0KHZ-30KHZ (such as 20KHZ) as the center frequency F3, the atomizer uses the center frequency F3 plus 0KHZ-30KHZ (such as 20KHZ) as the center frequency F4, and the atomizer uses the center frequency F4 plus 0KHZ-30KHZ (such as 20KHZ) as the center frequency F5.
The atomizer first finds the center frequency F0 and operates for a period of time (e.g., 10 microseconds to 500 milliseconds, and may be 100 milliseconds, and the like, and the same applies hereinafter), and then operates in sequence from the center frequency F5 to the center frequency F1 for a period of time, and thus operates back and forth in this way.
The atomizer may be operated to and fro in such a way that it finds the center frequency F0 and operates for a certain period of time, or stops spraying for a certain period of time and then operates at any one or more center frequencies of the center frequencies F5 to F1 for a certain period of time.
Alternatively, the atomizer may be operated by finding the center frequency F0 and operating it for a while, or by stopping the spraying for a while and then operating it at a frequency greater than the center frequency F1, in such a way that the atomizer is operated back and forth.
The atomizer first finds the center frequency F0 and operates for a period of time during which the operating frequency of the atomizer can fluctuate up and down around the center frequency F0, as well as around the center frequencies F1 to F5 during operation of the atomizer at the center frequencies F1 to F5.
The atomizer firstly finds out the center frequency F0 of the atomizer and works for a period of time, the atomizer works at the center frequency F0 for more than 20% of the whole spraying time (without the time of stopping spraying), and the atomizer works at the center frequency F1 for more than 20% of the whole spraying time (without the time of stopping spraying).
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (5)
1. A driving method of an ultrasonic atomizer, characterized in that: the method is realized by the following steps of,
1) the atomizer drives the atomizing plate to work at a certain central frequency F0 through a driving circuit of the atomizer, wherein the central frequency F0 is the main frequency of the atomizer, and the atomizer can generate effective atomizing amount;
2) adding a frequency of more than 16KHZ on the basis of the central frequency F0 to obtain a central frequency F1, using the central frequency F1 and then 0KHZ-30KHZ as central frequencies F2, using the central frequency F2 and then 0KHZ-30KHZ as central frequencies F3, using the central frequency F3 and then 0KHZ-30KHZ as central frequencies F4, and using the central frequency F4 and then 0KHZ-30KHZ as central frequencies F5;
3) the atomizer first finds its center frequency F0 and operates for a period of time, and then operates from center frequency F5 to center frequency F1 for a period of time, in this way, it operates back and forth.
2. The driving method of an ultrasonic atomizer according to claim 1, characterized in that: the atomizer firstly finds the center frequency F0 of the atomizer and works for a period of time, or stops spraying for a period of time, and then works back and forth according to the process of working at any center frequency or a plurality of center frequencies from the center frequency F5 to the center frequency F1 for a period of time.
3. The driving method of an ultrasonic atomizer according to claim 1, characterized in that: the atomizer firstly finds out the central frequency F0 and works for a period of time, or stops spraying for a period of time, and then works at a frequency higher than the central frequency F1, and works back and forth according to the process.
4. The driving method of an ultrasonic atomizer according to claim 1, characterized in that: the atomizer first finds its center frequency F0 and operates for a period of time during which the operating frequency of the atomizer can fluctuate up and down around center frequency F0, as well as during operation of the atomizer from center frequency F1 to center frequency F5, the operating frequency of the atomizer can fluctuate up and down around center frequency F1 to center frequency F5.
5. The driving method of an ultrasonic atomizer according to claim 1, characterized in that: the atomizer firstly finds the central frequency F0 and works for a period of time, and the working time at the central frequency F0 is more than 20% of the whole spraying time; the atomizer is operated at a center frequency greater than F1 for a time greater than 20% of the total spray time.
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| CN107670894A (en) * | 2017-09-12 | 2018-02-09 | 芯海科技（深圳）股份有限公司 | A kind of atomizer finely modulates the circuit and method of pulsewidth and dead time |
| CN108702132A (en) * | 2017-12-12 | 2018-10-23 | 深圳和而泰数据资源与云技术有限公司 | A kind of frequency locking circuit and its control method |
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| CN108802529A (en) * | 2018-08-23 | 2018-11-13 | 西安拓尔微电子有限责任公司 | A kind of fast determination method of atomizer transduction piece resonance point |
| CN209139006U (en) * | 2018-10-08 | 2019-07-23 | 广州厚达电子科技有限公司 | The ultrasonic ultrasonic delay line memory driving circuit of Low-voltage Low-power |
| CN109127257A (en) * | 2018-10-29 | 2019-01-04 | 无锡中微爱芯电子有限公司 | A kind of atomizer dedicated control circuit |
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