CN109620990A - A kind of ultrasonic wave fumigation device of constant spray amount - Google Patents
A kind of ultrasonic wave fumigation device of constant spray amount Download PDFInfo
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- CN109620990A CN109620990A CN201811597077.6A CN201811597077A CN109620990A CN 109620990 A CN109620990 A CN 109620990A CN 201811597077 A CN201811597077 A CN 201811597077A CN 109620990 A CN109620990 A CN 109620990A
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- 239000007921 spray Substances 0.000 title claims abstract description 40
- 238000003958 fumigation Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 61
- 239000004065 semiconductor Substances 0.000 claims description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 239000011889 copper foil Substances 0.000 claims description 26
- 230000006698 induction Effects 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 20
- 238000000889 atomisation Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 15
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims 1
- 241000222519 Agaricus bisporus Species 0.000 abstract description 3
- 235000001674 Agaricus brunnescens Nutrition 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 101100272964 Arabidopsis thaliana CYP71B15 gene Proteins 0.000 description 2
- 101100123053 Arabidopsis thaliana GSH1 gene Proteins 0.000 description 2
- 101100298888 Arabidopsis thaliana PAD2 gene Proteins 0.000 description 2
- 101000590281 Homo sapiens 26S proteasome non-ATPase regulatory subunit 14 Proteins 0.000 description 2
- 101001114059 Homo sapiens Protein-arginine deiminase type-1 Proteins 0.000 description 2
- 101150030164 PADI3 gene Proteins 0.000 description 2
- 101150092599 Padi2 gene Proteins 0.000 description 2
- 102100023222 Protein-arginine deiminase type-1 Human genes 0.000 description 2
- 102100035735 Protein-arginine deiminase type-2 Human genes 0.000 description 2
- 102100035734 Protein-arginine deiminase type-3 Human genes 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Special Spraying Apparatus (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a kind of ultrasonic wave fumigation devices of constant spray amount, including water tank, main control module, ultrasonic sweep-frequency module and water level detecting module, the main control module is connect with the ultrasonic sweep-frequency module, the water level detecting module respectively, and the water level detecting module is used to detect the height of water level in the water tank.The present invention relates to ultrasonic wave champignon technical field, a kind of ultrasonic wave fumigation device of constant spray amount is detected the height of water level in water tank, the spraying output power of adjust automatically, and then adjustable spraying amount by water level detecting module, realizes stable spray velocity.
Description
Technical field
The present invention relates to ultrasonic wave champignon technical field more particularly to a kind of ultrasonic wave fumigation devices of constant spray amount.
Background technique
Since there are the individual difference of resonance frequency, the existing separated excitings for chasing after frequency driving using CPU for ultrasonic atomization piece
Ultrasonic wave fumigating machine is the frequency sweep variable signal that certain band limits is exported by CPU, pushes metal-oxide-semiconductor and boost inductance to generate high
Alternation waveform is pressed to drive ultrasonic atomization piece to work, while the operating current of circuit is switched to by feedback voltage by sampling resistor
Frequency is chased after for CPU to detect.When feedback voltage corresponding to CPU detects a certain frequency-swept signal is maximum value, that is, it is considered as this
The optimum resonance point of ultrasonic atomization piece is simultaneously locked the EEPROM that it is written inside CPU, to realize the process for chasing after frequency.
Due to using pressure stabilizing to power, after CPU, which chases after frequency, arrives optimum resonant frequency point, operating current is also just accordingly constant to get off, and is atomized
The alternating voltage peak-to-peak value at piece both ends can't change with water level height in water tank, so if do not shifted gears, ultrasonic wave
Humidifier will always be in the output services state of firm power, therefore one problem of bring is that spray amount can be with water level
Variation and change it is very big, i.e., since atomizing piece is normally mounted at water tank bottom, when the water level in water tank is higher, on atomizing piece
The hydraulic pressure born is big, and the output power of atomizing piece must push on the acting of more water, thus spraying water column is lower, spray amount compared with
It is small.When the water level in water tank is lower, the hydraulic pressure born on atomizing piece is accordingly also small, although the power of atomizing piece output is still
Or it is original so big, due to needing the water pushed to reduce many, so spray amount just significantly increases naturally；It results in this way
Mist is on the low side when water is more, and mist is very big again when water is few, and spray velocity is obviously accelerated, be not able to satisfy at the uniform velocity spraying requirement.
Summary of the invention
The present invention is intended to provide a kind of ultrasonic wave fumigation device of constant spray amount, spraying by sensed water level height adjustment
Amount realizes more stable spray velocity.
The technical scheme adopted by the invention is that: a kind of ultrasonic wave fumigation device of constant spray amount, including water tank, master control
Module, ultrasonic sweep-frequency module and water level detecting module, the main control module respectively with the ultrasonic sweep-frequency module, the water
Position detection module connection, the water level detecting module are used to detect the height of water level in the water tank.
As a further improvement of the foregoing solution, the water level detecting module includes current rectifying and wave filtering circuit and water level detecting
Device, the output end of the level switch are connect with the input terminal of the current rectifying and wave filtering circuit, the current rectifying and wave filtering circuit it is defeated
Outlet is connect with the detection input of the main control module.
As a further improvement of the foregoing solution, the outer wall of the water tank, the water level is arranged in the level switch
Detector includes water level detecting pcb board and induction copper foil, and the induction copper foil is arranged on the water level detecting pcb board, adjacent
There is gap, the single current rectifying and wave filtering circuit is correspondingly connected with the single induction copper foil between two induction copper foils.
As a further improvement of the foregoing solution, the ultrasonic sweep-frequency module includes driving spraying circuit, the driving
Spraying circuit includes first resistor, second resistance, the first metal-oxide-semiconductor, boost inductance, first capacitor and ultrasonic atomization piece, described
Main control module includes the signal output end for exporting swept-frequency signal, and the signal output end of the main control module passes through connection first
Resistance is connect with the grid of the first metal-oxide-semiconductor, and the first input end of the boost inductance is connect with supply voltage, the boost inductance
The second input terminal connect with the drain electrode of the first metal-oxide-semiconductor, the output end of the boost inductance by series connection first capacitor with it is described
One end of ultrasonic atomization piece connects, the source electrode of the other end the first metal-oxide-semiconductor of connection of the ultrasonic atomization piece, and described first
The grid of metal-oxide-semiconductor is connect by second resistance with the source electrode of the first metal-oxide-semiconductor.
As a further improvement of the foregoing solution, the ultrasonic sweep-frequency module further includes sample circuit, the master control mould
Block includes sampling input terminal, and the sample circuit includes the second capacitor, third capacitor, 3rd resistor and the 4th resistance, and described the
The source electrode of one metal-oxide-semiconductor connects power ground by the 3rd resistor of connecting, and second capacitor is in parallel with the 3rd resistor, institute
The one end for stating the second capacitor is connect by the 4th resistance of connecting with the sampling input terminal of the main control module, the main control module
Sampling input terminal is connect by connecting the third capacitor with power ground.
As a further improvement of the foregoing solution, the ultrasonic sweep-frequency module further includes direct current regulation circuit, described straight
Flowing voltage regulator circuit includes the 4th capacitor, the 5th capacitor, and the 4th capacitor and the 5th capacitor are separately connected and supply voltage
Between power ground.
As a further improvement of the foregoing solution, the current rectifying and wave filtering circuit include third rectifier diode, the 5th resistance,
8th resistance, the 6th capacitor and the second triode, the first input end of the third rectifier diode and the 5th resistance
One end, power ground connection, the second input terminal of the third rectifier diode and the induction copper foil are electrically connected, the third
The output end of rectifier diode is connect with the other end of the 5th resistance, and the output end of the third rectifier diode passes through string
Joining the 8th resistance to connect with the base stage of second triode, the emitter of second triode is connect with power ground,
The collector of second triode is connect with the detection input of the main control module, one end of the 6th capacitor with it is described
The base stage of second triode connects, and the other end of the 6th capacitor is connect with the emitter of second triode.
The beneficial effects of the present invention are:
A kind of ultrasonic wave fumigation device of constant spray amount detects the height of water level in water tank by water level detecting module,
The spraying output power of adjust automatically, and then adjustable spraying amount realize more stable spray velocity, are filled with meeting user to champignon
Set at the uniform velocity spraying requirement.
Detailed description of the invention
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
Fig. 1 is the ultrasonic wave fumigation device module frame chart of the constant spray amount of the embodiment of the present invention one；
Fig. 2 is the ultrasonic wave fumigation device ultrasonic sweep-frequency modular circuit principle of the constant spray amount of the embodiment of the present invention one
Figure；
Fig. 3 is the ultrasonic wave fumigation device water level detecting modular circuit principle of the constant spray amount of the embodiment of the present invention one
Figure.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Embodiment one
Fig. 1 is the ultrasonic wave fumigation device module frame chart of the constant spray amount of the embodiment of the present invention one, referring to Fig.1, a kind of
The ultrasonic wave fumigation device of constant spray amount, including water tank, main control module, ultrasonic sweep-frequency module and water level detecting module.Its
In, main control module is connect with ultrasonic sweep-frequency module, water level detecting module respectively, and water level detecting module is for detecting water in water tank
The height of position.
In the present embodiment, main control module can be the single-chip microcontroller with internal EEPROM, it is preferred that main control module is internal RC
Frequency of oscillation at least 8MHz, the ROM Space at least single-chip microcontroller of 2K, ultrasonic sweep-frequency module include driving spraying circuit and sampling electricity
Road, the signal output end of main control module are connect with the input terminal of spraying circuit is driven, the sampling input terminal of main control module and sampling
The output end of circuit connects.
Fig. 2 is the ultrasonic wave fumigation device ultrasonic sweep-frequency modular circuit principle of the constant spray amount of the embodiment of the present invention one
Figure, referring to Fig. 2, driving spraying circuit includes first resistor R1, second resistance R2, the first metal-oxide-semiconductor Q1, boost inductance L1, first
The signal output end PWM of capacitor C1 and ultrasonic atomization piece CY1, main control module pass through connection first resistor R1 and the first metal-oxide-semiconductor
The grid of Q1 connects, and the first input end of boost inductance L1 is connect with supply voltage+VDD, the second input terminal of boost inductance L1
It is connect with the drain electrode of the first metal-oxide-semiconductor, the output end of boost inductance L1 passes through series connection first capacitor C1's and ultrasonic atomization piece CY1
One end connection, the other end of ultrasonic atomization piece CY1 connect the source electrode of the first metal-oxide-semiconductor Q1, and the grid of the first metal-oxide-semiconductor Q1 passes through the
Two resistance R2 are connect with the source electrode of the first metal-oxide-semiconductor.In the present embodiment, the N-channel MOS FET that the first metal-oxide-semiconductor is pressure resistance 100V is managed,
The models such as optional 16N10,12N10 are not necessarily to outer radiation fin.First resistor R1 can use 10 Ω to 22 Ω, in order to avoid the first metal-oxide-semiconductor Q1
MOSFET junction capacity charging and discharging currents it is excessive and damage the signal output end PWM of main control module, first resistor R1 can not value
Excessive, the MOSFET conducting internal resistance that otherwise will lead to the first metal-oxide-semiconductor Q1 is excessive, is decreased obviously spraying output power.
Second resistance R2 is the pull down resistor of the first metal-oxide-semiconductor Q1, can use 22k Ω to 47k Ω, to ensure shutdown or standby mould
The grid of the first metal-oxide-semiconductor Q1 is low level when formula, and the first metal-oxide-semiconductor Q1 is made to be in reliable off state.In the present embodiment, boosting
Inductance L1 is three foot I-shaped wire-wound inductors, and resistance to electric current should be greater than 3A, the ultrasonic fog for selecting to need with connect of inductance
The resonance frequency (i.e. the signal output end PWM driving frequency of main control module) for changing piece CY1 matches, extremely for supply voltage DC5V
DC12V, using the ultrasonic wave fumigation device of 3MHz ultrasonic atomization piece, tri- foot I-shaped inductance of boost inductance L1 is recommended to use 5uH
(inductance between first input end and the second input terminal): 10uH (inductance between the second input terminal and output end), the first electricity
Hold the optional 10nF/250V of C1.
When fumigation device opens spraying for the first time in the present embodiment, the signal output end PWM of main control module exports one group of frequency automatically
Rate from low to high, frequency timing be incremented by jump square wave swept-frequency signal (assuming that the working frequency of ultrasonic atomization piece be 1.7MHz
Or 3MHz, each stepped-frequency interval can use 10kHz to 20kHz, the frequency range of swept-frequency signal can use ultrasonic atomization piece standard
Resonance point ± 150kHz) it carries out chasing after frequency, the swept-frequency signal of the signal output end PWM output of main control module is pushed through first resistor R1
First metal-oxide-semiconductor is with same frequency switching on-off, when the conducting of the first metal-oxide-semiconductor, the first input end of boost inductance L1 and second defeated
Enter to hold energization energy storage, the output end boosting of boosted inductance L1 after removing direct current by first capacitor C1, drives ultrasonic atomization
It is spraying that piece CY1 pushes the liquid in water tank to generate.
Referring to Fig. 2, sample circuit includes the second capacitor C2, third capacitor C3,3rd resistor R3 and the 4th resistance R4, and first
The source electrode of metal-oxide-semiconductor Q1 is by series connection 3rd resistor R3 connection power ground, and the second capacitor C2 is in parallel with 3rd resistor R3, the second capacitor
Sampling input terminal A/D connection of the one end of C2 by series connection the 4th resistance R4 and main control module, the sampling input terminal of main control module
A/D is connect by connecting third capacitor C3 with power ground.In the present embodiment, the second capacitor C2 can use 47nF/50V to 100nF/
50V, third capacitor C3 can use 10nF/50V, and the 4th resistance R4 can use 1k Ω to 10k Ω.
3rd resistor R3 is by converting voltage for the operating current of ultrasonic sweep-frequency module, through the second capacitor C2, the 4th
After resistance R4, third capacitor C3 capacitance-resistance filter, the sampling input terminal A/D detection of main control module is sent to as feedback voltage.The
Three resistance R3 answer value 0.1 Ω to 0.25 Ω, 1/2W, 3rd resistor R3 can not value it is excessive, it is negative otherwise to will lead to sample circuit
It feeds back too strong, is decreased obviously spraying output power and spray amount；Also unsuitable value is too small by 3rd resistor R3, otherwise will lead to anti-
Feedthrough voltage is too small and main control module is made to generate erroneous judgement.
When the frequency for the swept-frequency signal that the signal output end PWM of main control module is exported reaches humorous with ultrasonic atomization piece CY1
When vibration, ultrasonic atomization piece CY1's is spraying most strong, and the operating current and feedback voltage of ultrasonic sweep-frequency module reach maximum.
By detecting the feedback voltage at the both ends 3rd resistor R3, feedback voltage maximum value corresponding to each swept frequency point is compared
Compared with, the Frequency point of feedthrough voltage maximum value is negated as resonance frequency, and is stored in the EEPROM inside main control module and is locked,
The fixed output frequency of main control module as subsequent spray, to complete to chase after frequency calibration process automatically.It should be noted that due to
It is to use program instruction by adjusting the setting of RC internal oscillator parameter to modify PWM timing that the PWM frequency of main control module, which is adjusted,
The dominant frequency mode of device chases after frequency to realize, so after main control module mixes up the resonance frequency of PWM output, it is necessary to for being modified
Influence of the RC parameter setting to original program timing precision, suitably increase and decrease timer counter in program and do corresponding timing and mend
It repays, to ensure the accuracy of timing.
In the present embodiment, ultrasonic sweep-frequency module further includes direct current regulation circuit, and direct current regulation circuit includes the 4th capacitor
C4, the 5th capacitor C5, the 4th capacitor C4 and the 5th capacitor C5 are separately connected between supply voltage+VDD and power ground, power supply electricity
Pressure+VDD is steady dc voltage, can be that (supply voltage is bigger, and the spraying power of maximum and spray amount are got over by DC5V~DC24V
Greatly), the 4th capacitor C4 can use 100nF/50V, and it is big that the 5th capacitor C5 can use 220uF to 470uF, its supply voltage of resistance to pressure ratio+VDD
Electrical stability of the supply voltage+VDD in spray operations can be improved, it is ensured that the sampling for being input to main control module is defeated in 10V
Enter to hold the feedback voltage maximum value variation of A/D and the authenticity of swept frequency corresponding relationship and accuracy (if supply voltage+
VDD spread of voltage during operation, it will lead to be input to the feedback voltage feedback amplitude of wave form of sampling input terminal A/D therewith
Fluctuation makes main control module judge frequency locking frequency by accident, causes to work by spraying on optimum resonant frequency point, spray effect is caused to become
Difference even can not be normally sprayed).
Main control module is powered using DC5V pressure stabilizing, to ensure that signal output end PWM has sufficiently high voltage to go driving first
Metal-oxide-semiconductor Q1 obtains biggish power output and spray effect to reduce the conducting internal resistance of MOSFET pipe as far as possible.
Referring to Fig.1, in the present embodiment, water level detecting module includes current rectifying and wave filtering circuit and level switch, water level detecting
The output end of device and the input terminal of current rectifying and wave filtering circuit connect, and the detection of the output end and main control module of current rectifying and wave filtering circuit inputs
End connection.Wherein, the outer wall (not shown in figure 1) of water tank is arranged in level switch.
Fig. 3 is the ultrasonic wave fumigation device water level detecting modular circuit principle of the constant spray amount of the embodiment of the present invention one
Figure, referring to Fig. 3, level switch includes water level detecting pcb board 1 and induction copper foil PAD, and induction copper foil PAD setting is examined in water level
It surveys on pcb board 1, there is gap, it is preferred that between two neighboring induction copper foil PAD between two neighboring induction copper foil PAD
Gap is not less than 1.5mm, and the area of each induction copper foil is not less than 72 square millimeters.In the present embodiment, induction copper foil PAD is provided with
Three (induction copper foil number can be arranged according to actual needs), single current rectifying and wave filtering circuit is correspondingly connected with single induction copper foil PAD.
In the present embodiment, current rectifying and wave filtering circuit includes that the first current rectifying and wave filtering circuit, the second current rectifying and wave filtering circuit and third are whole
Flow filter circuit, wherein the first current rectifying and wave filtering circuit includes third rectifier diode D3, the 5th resistance R5, the 8th resistance R8, the
Six capacitor C6 and the second triode Q2, the first input end of third rectifier diode D3 and one end, the power ground of the 5th resistance R5
Connection, the second input terminal of third rectifier diode D3 and the first induction copper foil PAD1 are electrically connected, third rectifier diode D3
Output end by connect the 8th resistance R8 connect with the base stage of the second triode Q2, the emitter and power supply of the second triode Q2
Ground connection, the first detection input WATER1 connection of the collector and main control module of the second triode Q2, the 6th capacitor C6's
One end is connect with the base stage of the second triode Q2, and the other end of the 6th capacitor C6 is connect with the emitter of the second triode Q2.
Second rectification circuit includes the 4th rectifier diode D4, the 6th resistance R6, the 9th resistance R9, the 7th capacitor C7 and the
Three triode Q3, the first input end of the 4th rectifier diode D4 are connect with one end of the 6th resistance R6, power ground, the 4th rectification
The second input terminal of diode D4 and the second induction copper foil PAD2 are electrically connected, and the output end of the 4th rectifier diode D4 passes through string
Joining the 9th resistance R9 to connect with the base stage of third transistor Q3, the emitter of third transistor Q3 is connect with power ground, and the three or three
Second detection input WATER2 connection of the collector and main control module of pole pipe Q3, one end and the three or three pole of the 7th capacitor C7
The base stage of pipe Q3 connects, and the other end of the 7th capacitor C7 is connect with the emitter of third transistor Q3.
Third rectification circuit include the 5th rectifier diode D5, the 7th resistance R7, the tenth resistance R10, the 8th capacitor C8 and
The first input end of 4th triode Q4, the 5th rectifier diode D5 are connect with one end of the 7th resistance R7, power ground, and the 5th is whole
The second input terminal and third induction copper foil PAD3 for flowing diode D5 are electrically connected, and the output end of the 5th rectifier diode D5 passes through
The tenth resistance R10 that connects is connect with the base stage of the 4th triode Q4, and the emitter of the 4th triode Q4 is connect with power ground, and the 4th
The third detection input WATER3 connection of the collector and main control module of triode Q4, one end and the four or three of the 8th capacitor C8
The base stage of pole pipe Q4 connects, and the other end of the 8th capacitor C8 is connect with the emitter of the 4th triode Q4.
In the present embodiment, the first detection input WATER1 of main control module, the second detection input WATER2, third inspection
Surveying input terminal WATER3 is three I/O mouthfuls of single-chip microcontroller, and three I/O mouthfuls of single-chip microcontroller should be set as internal pull-up, otherwise without
Method generates low and high level variation for monolithic machine testing.
In the present embodiment, the first triode Q1, the second triode Q2, third transistor Q3 are NPN triode, be can be
3904, the models triode such as 9014,8050.Third rectifier diode D3, the 4th rectifier diode D4, the 5th rectifier diode D5
The double diode of the series such as optional BAV99, BAT54S.6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8 are 1uF/50V.
8th resistance R8, the 9th resistance R9, the tenth resistance R10 are 150 Ω to obtain the DC voltage of certain numerical value and protect the one or three
Pole pipe Q1, the second triode Q2, the unlikely overcurrent of third transistor Q3 are burnt out.
When ultrasonic wave fumigation device starts spray operations, the oscillation alternating voltage on ultrasonic atomization piece surface can pass through water
Aqueous conducting medium in case is transmitted on induction copper foil PAD by tank outer wall to blazing about and generates induced voltage.Induction
Copper foil PAD receives the oscillation alternation inductive signal of the Water transport in water tank, constitutes inside and outside water tank wall with the water in water tank
Capacitive sensing effect.When the first induction copper foil PAD1 senses oscillation alternating voltage, rectified by third rectifier diode D3
After the 5th resistance R5, the 8th resistance R8, the 6th capacitor C6 filtering, direct voltage drive the second triode Q2 conducting is converted to,
Input low level to main control module the first detection input WATER1, when main control module the first detection input WATER1 examine
When measuring low level, determine that first grade of water level has water, when the first detection input WATER1 of main control module detects high level
When, determine that first grade of water level does not have water.When the second induction copper foil PAD2 senses oscillation alternating voltage, pass through the 4th rectification two
After pole pipe D4 rectification and the 6th resistance R6, the 9th resistance R9, the 7th capacitor C7 filtering, the three or three pole of direct voltage drive is converted to
Pipe Q3 conducting, for input low level to the second detection input WATER2 of main control module, second when main control module detects input
When end WATER2 detects low level, determine that second gear water level has water, when the second detection input WATER2 of main control module is examined
When measuring high level, determine that second gear water level does not have water.When third induction copper foil PAD3 senses oscillation alternating voltage, pass through
After 5th rectifier diode D5 rectification and the 7th resistance R7, the tenth resistance R10, the 8th capacitor C8 filtering, DC voltage is converted to
Drive the 4th triode Q4 be connected, input low level to main control module third detection input WATER3, when main control module
When third detection input WATER3 detects low level, determine that third gear water level has water, when the third detection of main control module is defeated
When entering that WATER3 is held to detect high level, determine that third gear water level does not have water.
Height of the main control module according to sensed water level, the wave of the swept-frequency signal of automatic regulating signal output end PWM output end
Shape duty ratio, (water level is higher, PWM for the spray amount size for adjusting ultrasonic wave fumigation device by adjusting PWM on-off number ratio
Duty ratio is just adjusted bigger, and the power of atomizing piece output is bigger, and spray amount is bigger；Water level is lower, and PWM duty cycle is just adjusted
It is smaller, atomizing piece output power with regard to smaller, spray amount is smaller), to reach constant spray amount.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (7)
1. a kind of ultrasonic wave fumigation device of constant spray amount, including water tank, which is characterized in that it includes main control module, ultrasound
Wave scan module and water level detecting module, the main control module respectively with the ultrasonic sweep-frequency module, the water level detecting mould
Block connection, the water level detecting module are used to detect the height of water level in the water tank.
2. a kind of ultrasonic wave fumigation device of constant spray amount according to claim 1, which is characterized in that the water level inspection
Surveying module includes current rectifying and wave filtering circuit and level switch, the output end of the level switch and the current rectifying and wave filtering circuit
Input terminal connection, the output end of the current rectifying and wave filtering circuit are connect with the detection input of the main control module.
3. a kind of ultrasonic wave fumigation device of constant spray amount according to claim 2, which is characterized in that the water level inspection
The outer wall that the water tank is arranged in device is surveyed, the level switch includes water level detecting pcb board and induction copper foil, the induction copper
Foil is arranged on the water level detecting pcb board, has gap, the single rectifying and wave-filtering between the two neighboring induction copper foil
Circuit is correspondingly connected with the single induction copper foil.
4. a kind of ultrasonic wave fumigation device of constant spray amount according to any one of claims 1 to 3, which is characterized in that
The ultrasonic sweep-frequency module includes driving spraying circuit, and the spraying circuit of driving includes first resistor, second resistance, first
Metal-oxide-semiconductor, boost inductance, first capacitor and ultrasonic atomization piece, the main control module include the signal for exporting swept-frequency signal
Output end, the signal output end of the main control module are connect by connecting first resistor with the grid of the first metal-oxide-semiconductor, the boosting
The first input end of inductance is connect with supply voltage, and the second input terminal of the boost inductance is connect with the drain electrode of the first metal-oxide-semiconductor,
The output end of the boost inductance is connect by first capacitor of connecting with one end of the ultrasonic atomization piece, the ultrasonic fog
The other end for changing piece connects the source electrode of the first metal-oxide-semiconductor, and the grid of first metal-oxide-semiconductor passes through second resistance and the first metal-oxide-semiconductor
Source electrode connection.
5. a kind of ultrasonic wave fumigation device of constant spray amount according to claim 4, which is characterized in that the ultrasonic wave
Scan module further includes sample circuit, and the main control module includes sampling input terminal, and the sample circuit includes the second capacitor, the
The source electrode of three capacitors, 3rd resistor and the 4th resistance, first metal-oxide-semiconductor connects power ground by the 3rd resistor of connecting,
Second capacitor is in parallel with the 3rd resistor, and one end of second capacitor passes through the 4th resistance of series connection and the master control mould
The sampling input terminal of block connects, and the sampling input terminal of the main control module is connect by connecting the third capacitor with power ground.
6. a kind of ultrasonic wave fumigation device of constant spray amount according to claim 5, which is characterized in that the ultrasonic wave
Scan module further includes direct current regulation circuit, and the direct current regulation circuit includes the 4th capacitor, the 5th capacitor, the 4th capacitor
It is separately connected between supply voltage and power ground with the 5th capacitor.
7. a kind of ultrasonic wave fumigation device of constant spray amount according to claim 3, which is characterized in that the rectification filter
Wave circuit includes third rectifier diode, the 5th resistance, the 8th resistance, the 6th capacitor and the second triode, the third rectification
The first input end of diode is connect with one end of the 5th resistance, power ground, and the second of the third rectifier diode is defeated
Enter end to be electrically connected with the induction copper foil, the other end of the output end of the third rectifier diode and the 5th resistance connects
It connecing, the output end of the third rectifier diode is connect by the 8th resistance of connecting with the base stage of second triode,
The emitter of second triode is connect with power ground, the detection of the collector and the main control module of second triode
Input terminal connection, one end of the 6th capacitor are connect with the base stage of second triode, the other end of the 6th capacitor
It is connect with the emitter of second triode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597077.6A CN109620990B (en) | 2018-12-26 | Ultrasonic aromatherapy device with constant spraying quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597077.6A CN109620990B (en) | 2018-12-26 | Ultrasonic aromatherapy device with constant spraying quantity |
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| Publication Number | Publication Date |
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| CN109620990A true CN109620990A (en) | 2019-04-16 |
| CN109620990B CN109620990B (en) | 2024-05-17 |
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| CN110243433A (en) * | 2019-05-21 | 2019-09-17 | 广州畅呼医疗器械有限公司 | A kind of water shortage detection system, method and the atomizer of atomizer |
| CN115931985A (en) * | 2022-12-02 | 2023-04-07 | 成都目然健康科技有限公司 | Atomization amount measuring device based on capacitor, atomizer and atomization control method |
| EP4042891A4 (en) * | 2019-11-26 | 2023-11-08 | China Tobacco Hunan Industrial Co., Ltd. | Ultrasonic atomizing sheet full-wave drive circuit, and ultrasonic electronic cigarette |
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| EP4042891A4 (en) * | 2019-11-26 | 2023-11-08 | China Tobacco Hunan Industrial Co., Ltd. | Ultrasonic atomizing sheet full-wave drive circuit, and ultrasonic electronic cigarette |
| CN115931985A (en) * | 2022-12-02 | 2023-04-07 | 成都目然健康科技有限公司 | Atomization amount measuring device based on capacitor, atomizer and atomization control method |
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