CN209827670U - Ultrasonic aromatherapy device with constant spraying amount - Google Patents
Ultrasonic aromatherapy device with constant spraying amount Download PDFInfo
- Publication number
- CN209827670U CN209827670U CN201822208181.3U CN201822208181U CN209827670U CN 209827670 U CN209827670 U CN 209827670U CN 201822208181 U CN201822208181 U CN 201822208181U CN 209827670 U CN209827670 U CN 209827670U
- Authority
- CN
- China
- Prior art keywords
- resistor
- capacitor
- ultrasonic
- water level
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 42
- 238000000222 aromatherapy Methods 0.000 title claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 239000003990 capacitor Substances 0.000 claims description 61
- 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 21
- 238000005070 sampling Methods 0.000 claims description 21
- 238000000889 atomisation Methods 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 238000010408 sweeping Methods 0.000 claims description 11
- 230000001939 inductive effect Effects 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 239000003205 fragrance Substances 0.000 abstract description 6
- 241000222519 Agaricus bisporus Species 0.000 abstract description 5
- 235000001674 Agaricus brunnescens Nutrition 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects 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
- 230000001965 increasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Special Spraying Apparatus (AREA)
Abstract
The utility model discloses an ultrasonic fragrance device of invariable spraying volume, including water tank, host system, ultrasonic wave frequency sweep module and water level detection module, host system respectively with ultrasonic wave frequency sweep module the water level detection module is connected, water level detection module is used for detecting the height of water level in the water tank. The utility model relates to an ultrasonic wave champignon technical field, an ultrasonic wave champignon device of invariable spraying volume, through the height of water level in the water level detection module detection water tank, the output of automatic adjustment spraying, and then adjust the spraying volume, realize stable spraying speed.
Description
Technical Field
The utility model relates to an ultrasonic fragrance technical field especially relates to an ultrasonic fragrance device of invariable spraying volume.
Background
Because the ultrasonic atomization piece has individual difference of resonance frequency, the existing independent excitation type ultrasonic aromatherapy machine adopting CPU frequency tracking drive has the advantages that the CPU outputs sweep frequency change signals in a certain frequency range to push the MOS tube and the boost inductor to generate high-voltage alternating waveforms to drive the ultrasonic atomization piece to work, and meanwhile, the working current of the circuit is converted into feedback voltage through the sampling resistor to be used for CPU frequency tracking detection. When the CPU detects that the feedback voltage corresponding to a frequency sweep signal is the maximum value, the feedback voltage is regarded as the optimal resonance point of the ultrasonic atomization sheet and is written into an EEPROM in the CPU to be locked, and therefore the frequency tracking process is achieved. Because of adopting steady voltage power supply, after CPU chases after the best resonant frequency point frequently, operating current also is invariable correspondingly, and the alternating voltage peak-to-peak value at atomizing piece both ends can not change along with the height of water level in the water tank, so if not shift, ultrasonic humidifier will be in the output operating condition of constant power always, a problem that consequently brings is that the spray volume can change along with the change of water level, because atomizing piece installs the water tank bottom usually, when the water level in the water tank is higher, the water pressure that bears on the atomizing piece is big, the output of atomizing piece must promote more water and do work, so the spraying water column is lower, the spray volume is less. When the water level in the water tank is lower, the water pressure born by the atomizing sheet is correspondingly small, although the output power of the atomizing sheet is still as large as the original power, the amount of water to be pushed is reduced a lot, so the spray amount is naturally and obviously increased; therefore, the fog is less when the water is more, the fog is very large when the water is less, the spraying speed is obviously accelerated, and the requirement of uniform spraying cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultrasonic wave champignon device of invariable spraying volume through detecting the water level altitude mixture control spraying volume, realizes more stable spraying speed.
The utility model adopts the technical proposal that: the utility model provides an ultrasonic fragrance device of invariable spray volume, includes water tank, host system, ultrasonic wave frequency sweep module and water level detection module, host system respectively with ultrasonic wave frequency sweep module the water level detection module is connected, water level detection module is used for detecting the height of water level in the water tank.
As a further improvement of the above scheme, the water level detection module includes a rectifying and filtering circuit and a water level detector, an output end of the water level detector is connected with an input end of the rectifying and filtering circuit, and an output end of the rectifying and filtering circuit is connected with a detection input end of the main control module.
As a further improvement of the above scheme, the water level detector is arranged on the outer wall of the water tank and comprises a water level detection PCB board and induction copper foils, the induction copper foils are arranged on the water level detection PCB board, a gap is formed between every two adjacent induction copper foils, and a single one of the rectification filter circuits is correspondingly connected with a single one of the induction copper foils.
As a further improvement of the above scheme, the ultrasonic frequency sweeping module includes a driving spraying circuit, the driving spraying circuit includes a first resistor, a second resistor, a first MOS transistor, a boosting inductor, a first capacitor and an ultrasonic atomization sheet, the main control module includes a signal output end for outputting frequency sweeping signals, the signal output end of the main control module is connected with the gate of the first MOS transistor through the first resistor, the first input end of the boosting inductor is connected with a power supply voltage, the second input end of the boosting inductor is connected with the drain of the first MOS transistor, the output end of the boosting inductor is connected with one end of the ultrasonic atomization sheet through the first capacitor connected in series, the other end of the ultrasonic atomization sheet is connected with the source of the first MOS transistor, and the gate of the first MOS transistor is connected with the source of the first MOS transistor through the second resistor.
As a further improvement of the above scheme, the ultrasonic frequency sweeping module further includes a sampling circuit, the main control module includes a sampling input end, the sampling circuit includes a second capacitor, a third resistor and a fourth resistor, the source electrode of the first MOS transistor is connected to the power ground through the third resistor in series, the second capacitor is connected in parallel with the third resistor, one end of the second capacitor is connected to the sampling input end of the main control module through the fourth resistor in series, and the sampling input end of the main control module is connected to the power ground through the third capacitor.
As a further improvement of the above scheme, the ultrasonic frequency sweeping module further comprises a direct current voltage stabilizing circuit, the direct current voltage stabilizing circuit comprises a fourth capacitor and a fifth capacitor, and the fourth capacitor and the fifth capacitor are respectively connected between a power supply voltage and a power supply ground.
As a further improvement of the above scheme, the rectifying and filtering circuit comprises a third rectifying diode, a fifth resistor, an eighth resistor, a sixth capacitor and a second triode, a first input end of the third rectifying diode is connected with one end of the fifth resistor and the power ground, the second input end of the third rectifying diode is electrically connected with the induction copper foil, the output end of the third rectifying diode is connected with the other end of the fifth resistor, the output end of the third rectifying diode is connected with the base electrode of the second triode through the eighth resistor connected in series, the emitter of the second triode is connected with the power ground, the collector of the second triode is connected with the detection input end of the main control module, one end of the sixth capacitor is connected with the base electrode of the second triode, and the other end of the sixth capacitor is connected with the emitting electrode of the second triode.
The utility model has the advantages that:
the utility model provides an ultrasonic wave champignon device of invariable spraying volume, detects the height of water level in the water tank through water level detection module, the output of automatic adjustment spraying, and then adjusts the spraying volume, realizes more stable spraying speed to satisfy the requirement of user to the at the uniform velocity spraying of champignon device.
Drawings
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
fig. 1 is a block diagram of an ultrasonic aromatherapy device with constant spraying amount according to a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an ultrasonic frequency sweeping module of a constant-spraying-amount ultrasonic aromatherapy device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a water level detection module of an ultrasonic aromatherapy device with constant spraying amount according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
Fig. 1 is the utility model discloses ultrasonic fragrance device module block diagram of invariable spray volume, refers to fig. 1, an ultrasonic fragrance device of invariable spray volume, including water tank, host system, ultrasonic sweep frequency module and water level detection module. The main control module is respectively connected with the ultrasonic frequency sweeping module and the water level detection module, and the water level detection module is used for detecting the height of the water level in the water tank.
In this embodiment, the main control module may be a single chip microcomputer with an internal EEPROM, and preferably, the main control module is a single chip microcomputer with an internal RC oscillation frequency of at least 8MHz and a ROM space of at least 2K, the ultrasonic frequency sweep module includes a drive spray circuit and a sampling circuit, a signal output end of the main control module is connected with an input end of the drive spray circuit, and a sampling input end of the main control module is connected with an output end of the sampling circuit.
Fig. 2 is the ultrasonic wave frequency sweeping module schematic diagram of the ultrasonic aromatherapy device with constant spraying amount according to the first embodiment of the present invention, refer to fig. 2, the driving spraying circuit includes a first resistor R1, a second resistor R2, a first MOS transistor Q1, a boosting inductor L1, a first capacitor C1 and an ultrasonic atomization sheet CY1, the signal output end PWM of the main control module is connected with the gate of the first MOS transistor Q1 through a first resistor R1, the first input end of the boosting inductor L1 is connected with the power supply voltage + VDD, the second input end of the boosting inductor L1 is connected with the drain of the first MOS transistor, the output end of the boosting inductor L1 is connected with one end of the ultrasonic atomization sheet CY1 through a first capacitor C1 connected in series, the other end of the ultrasonic atomization sheet CY1 is connected with the source of the first MOS transistor Q1, the gate of the first MOS transistor Q1 is connected with the source of the first MOS transistor through a second resistor R2. In this embodiment, the first MOS transistor is an N-channel MOSFET with a withstand voltage of 100V, and may be 16N10, 12N10, or the like, without adding a heat sink. The first resistor R1 can be 10 Ω to 22 Ω, so as to prevent the signal output end PWM of the main control module from being damaged due to too large charging and discharging current of the MOSFET junction capacitor of the first MOS transistor Q1, and the first resistor R1 cannot take too large value, otherwise the MOSFET of the first MOS transistor Q1 is turned on and internally blocked, so that the spray output power is obviously reduced.
The second resistor R2 is a pull-down resistor of the first MOS transistor Q1, and may be 22k Ω to 47k Ω, so as to ensure that the gate of the first MOS transistor Q1 is at a low level when in the shutdown or standby mode, and the first MOS transistor Q1 is in a reliable shutdown state.
In this embodiment, the boost inductor L1 is a three-pin i-shaped wound inductor, the current resistance of the boost inductor L1 is greater than 3A, the inductance needs to be selected to match the resonant frequency of the connected ultrasonic atomization sheet CY1 (i.e., the PWM driving frequency of the signal output terminal of the main control module), for the ultrasonic aromatherapy device using the 3MHz ultrasonic atomization sheet with the supply voltages DC5V to DC12V, the boost inductor L1 three-pin i-shaped inductor recommends using 5uH (the inductance between the first input terminal and the second input terminal): 10nF (the inductance between the second input terminal and the output terminal), and the first capacitor C1 may select 10 nF/250V.
When the aromatherapy device in the embodiment starts spraying for the first time, the signal output end PWM of the main control module automatically outputs a group of square wave frequency sweep signals (assuming that the working frequency of the ultrasonic atomization piece is 1.7MHz or 3MHz, the frequency hopping interval can be 10kHz to 20kHz at each time, and the frequency range of the frequency sweep signals can be ± 150kHz of the standard resonance point of the ultrasonic atomization piece) with frequency increasing and hopping at regular time to follow up the frequency, the frequency sweep signals output by the signal output end PWM of the main control module push the first MOS transistor to be switched on and off with the same frequency through the first resistor R1, when the first MOS transistor is switched on, the first input end and the second input end of the boost inductor L1 are electrified to store energy, the output end of the boost inductor L1 is boosted, and after the direct current is removed through the first capacitor C1, the ultrasonic atomization piece CY1 is driven to push the liquid in the water tank.
Referring to fig. 2, the sampling circuit includes a second capacitor C2, a third capacitor C3, a third resistor R3 and a fourth resistor R4, the source of the first MOS transistor Q1 is connected to the power ground through the series connection of the third resistor R3, the second capacitor C2 is connected in parallel with the third resistor R3, one end of the second capacitor C2 is connected to the sampling input terminal a/D of the main control module through the series connection of the fourth resistor R4, and the sampling input terminal a/D of the main control module is connected to the power ground through the connection of the third capacitor C3. In this embodiment, the second capacitor C2 can be 47nF/50V to 100nF/50V, the third capacitor C3 can be 10nF/50V, and the fourth resistor R4 can be 1k Ω to 10k Ω. The third resistor R3 converts the working current of the ultrasonic frequency sweeping module into voltage, and the voltage is subjected to resistance-capacitance filtering by the second capacitor C2, the fourth resistor R4 and the third capacitor C3 and then is used as feedback voltage to be sent to the sampling input end A/D (analog/digital) detection of the main control module. The value of the third resistor R3 is 0.1-0.25 omega, 1/2W, the value of the third resistor R3 is too large, otherwise, negative feedback of a sampling circuit is too strong, and the output power and the spray amount of the spray are obviously reduced; the third resistor R3 should not be too small, otherwise the feedback voltage is too small, which causes the main control module to generate misjudgment.
When the frequency of the sweep frequency signal output by the signal output end PWM of the main control module and the ultrasonic atomization sheet CY1 reach resonance, the spray of the ultrasonic atomization sheet CY1 is strongest, and the working current and the feedback voltage of the ultrasonic sweep frequency module both reach the maximum. The feedback voltage at two ends of the third resistor R3 is detected, the maximum value of the feedback voltage corresponding to each sweep frequency point is compared, the frequency point with the maximum value of the feedback voltage is taken as the resonance frequency, the frequency point is stored in the EEPROM in the main control module to be locked, the frequency point is taken as the fixed output frequency of the main control module for subsequent spraying, and therefore the automatic frequency tracking calibration process is completed.
In this embodiment, the ultrasonic frequency sweep module further includes a DC voltage regulator circuit, the DC voltage regulator circuit includes a fourth capacitor C4 and a fifth capacitor C5, the fourth capacitor C4 and the fifth capacitor C5 are respectively connected between the power voltage + VDD and the power ground, the power voltage + VDD is a stable DC voltage, which may be DC5V to DC24V (the larger the power supply voltage is, the larger the maximum spraying power and spraying amount is), the fourth capacitor C4 may take 100nF/50V, the fifth capacitor C5 may take 220uF to 470uF, the withstand voltage of which is 10V greater than the power voltage + VDD, which may improve the power supply stability of the power voltage + VDD during spraying operation, ensure the authenticity and accuracy of the relationship between the maximum change of the feedback voltage input to the sampling input terminal a/D of the main control module and the frequency sweep frequency (if the voltage of the power voltage + VDD during operation is unstable, the feedback amplitude waveform of the feedback voltage input to the sampling input terminal a/D will fluctuate accordingly, the main control module misjudges the frequency locking frequency, so that the spraying cannot work on the optimal resonance frequency point, and the spraying effect is poor or even normal spraying cannot be realized).
The main control module adopts DC5V voltage stabilization power supply to ensure that the signal output end PWM has high enough voltage to drive the first MOS tube Q1, so as to reduce the conduction internal resistance of the MOSFET tube as much as possible and obtain larger power output and spraying effect.
Referring to fig. 1, in this embodiment, the water level detection module includes a rectifying and filtering circuit and a water level detector, an output end of the water level detector is connected to an input end of the rectifying and filtering circuit, and an output end of the rectifying and filtering circuit is connected to a detection input end of the main control module. Wherein the water level detector is provided at an outer wall of the water tank (not shown in fig. 1).
Fig. 3 is the ultrasonic aromatherapy device water level detection module schematic circuit diagram of the first embodiment of the present invention, referring to fig. 3, the water level detector includes a water level detection PCB board 1 and an induction copper foil PAD, the induction copper foil PAD is disposed on the water level detection PCB board 1, a gap is provided between two adjacent induction copper foils PAD, preferably, the gap between two adjacent induction copper foils PAD is not less than 1.5mm, and the area of each induction copper foil is not less than 72 square millimeters. In this embodiment, the number of the inductive copper foils PAD is three (the number of the inductive copper foils can be set according to actual requirements), and a single rectifying and filtering circuit is correspondingly connected to a single inductive copper foil PAD.
In this embodiment, the rectifying and filtering circuit includes a first rectifying and filtering circuit, a second rectifying and filtering circuit and a third rectifying and filtering circuit, the first rectifying and filtering circuit comprises a third rectifying diode D3, a fifth resistor R5, an eighth resistor R8, a sixth capacitor C6 and a second triode Q2, wherein a first input end of the third rectifying diode D3 is connected with one end of the fifth resistor R5 and a power ground, a second input end of the third rectifying diode D3 is electrically connected with a first inductive copper foil PAD1, an output end of the third rectifying diode D3 is connected with a base of the second triode Q2 through the eighth resistor R8 in series, an emitter of the second triode Q2 is connected with the power ground, a collector of the second triode Q2 is connected with a first detection input end WATER1 of the main control module, one end of the sixth capacitor C6 is connected with a base of the second triode Q2, and the other end of the sixth capacitor C6 is connected with an emitter of the second triode Q2.
The second rectifying circuit comprises a fourth rectifying diode D4, a sixth resistor R6, a ninth resistor R9, a seventh capacitor C7 and a third triode Q3, a first input end of the fourth rectifying diode D4 is connected with one end of a sixth resistor R6, a second input end of the fourth rectifying diode D4 is electrically connected with the second inductive copper foil PAD2, an output end of the fourth rectifying diode D4 is connected with a base of the third triode Q3 through a ninth resistor R9 in series, an emitter of the third triode Q3 is connected with a power ground, a collector of the third triode Q3 is connected with the second detection input end WATER2 of the main control module, one end of the seventh capacitor C7 is connected with a base of the third triode Q3, and the other end of the seventh capacitor C7 is connected with an emitter of the third triode Q3.
The third rectifying circuit comprises a fifth rectifying diode D5, a seventh resistor R7, a tenth resistor R10, an eighth capacitor C8 and a fourth triode Q4, a first input end of the fifth rectifying diode D5 is connected with one end of the seventh resistor R7 and the power ground, a second input end of the fifth rectifying diode D5 is electrically connected with the third inductive copper foil PAD3, an output end of the fifth rectifying diode D5 is connected with the base of the fourth triode Q4 through the tenth resistor R10 in series, the emitter of the fourth triode Q4 is connected with the power ground, the collector of the fourth triode Q4 is connected with the third detection input end WATER3 of the main control module, one end of the eighth capacitor C8 is connected with the base of the fourth triode Q4, and the other end of the eighth capacitor C8 is connected with the emitter of the fourth triode Q4.
In this embodiment, the first detection input terminal WATER1, the second detection input terminal WATER2, and the third detection input terminal WATER3 of the main control module are all three I/O ports of the single chip microcomputer, and the three I/O ports of the single chip microcomputer should be set to be internally pulled up, otherwise, a high-low level change cannot be generated for the single chip microcomputer to detect.
In this embodiment, the first transistor Q1, the second transistor Q2, and the third transistor Q3 are NPN transistors, which may be 3904, 9014, 8050, and the like. The third rectifier diode D3, the fourth rectifier diode D4 and the fifth rectifier diode D5 can be double diodes of BAV99, BAT54S and other series. The sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8 are all 1 uF/50V. The eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 are 150 Ω to obtain a dc voltage with a certain value and protect the first transistor Q1, the second transistor Q2, and the third transistor Q3 from being burned out by overcurrent.
When the ultrasonic aromatherapy device starts spraying, oscillation alternating voltage on the surface of the ultrasonic atomization piece can be transmitted to four places through a water-containing conductive medium in the water tank and is transmitted to the PAD (copper foil PAD) through the outer wall of the water tank to generate induction voltage. The induction copper foil PAD receives an oscillation alternating induction signal transmitted by water in the water tank, and forms a capacitance induction effect with the water in the water tank inside and outside the wall of the water tank. When the first induction copper foil PAD1 induces oscillation alternating voltage, the oscillation alternating voltage is rectified by a third rectifying diode D3, filtered by a fifth resistor R5, an eighth resistor R8 and a sixth capacitor C6 and converted into direct current voltage to drive a second triode Q2 to be conducted, low level is input to a first detection input terminal WATER1 of the main control module, when the first detection input terminal WATER1 of the main control module detects low level, it is determined that the first WATER level is level, and when the first detection input terminal WATER1 of the main control module detects high level, it is determined that the first WATER level is not level. When the second induction copper foil PAD2 induces oscillation alternating voltage, the oscillation alternating voltage is rectified by a fourth rectifying diode D4 and filtered by a sixth resistor R6, a ninth resistor R9 and a seventh capacitor C7, and then converted into direct current voltage to drive a third triode Q3 to be conducted, low level is input to a second detection input terminal WATER2 of the main control module, when the second detection input terminal WATER2 of the main control module detects low level, it is determined that the second gear WATER level is level, and when the second detection input terminal WATER2 of the main control module detects high level, it is determined that the second gear WATER level is not level. When the third induction copper foil PAD3 induces an oscillation alternating voltage, the oscillation alternating voltage is rectified by a fifth rectifier diode D5 and filtered by a seventh resistor R7, a tenth resistor R10 and an eighth capacitor C8, and then converted into a direct current voltage to drive a fourth triode Q4 to be conducted, a low level is input to a third detection input terminal WATER3 of the main control module, when the third detection input terminal WATER3 of the main control module detects the low level, it is determined that the third WATER level is level, and when the third detection input terminal WATER3 of the main control module detects the high level, it is determined that the third WATER level is not level.
The main control module automatically adjusts the waveform duty ratio of the sweep frequency signal at the PWM output end of the signal output end according to the detected water level, and adjusts the spray volume of the ultrasonic aromatherapy device by adjusting the proportion of the number of the PWM on-off times (the higher the water level is, the larger the PWM duty ratio is adjusted, the higher the power output by the atomizing sheet is, the larger the spray volume is, the lower the water level is, the smaller the PWM duty ratio is adjusted, the smaller the power output by the atomizing sheet is, and the smaller the spray volume is), so that the constant spray volume is achieved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The ultrasonic aromatherapy device with the constant spraying amount comprises a water tank and is characterized by comprising a main control module, an ultrasonic frequency sweeping module and a water level detection module, wherein the main control module is respectively connected with the ultrasonic frequency sweeping module and the water level detection module, and the water level detection module is used for detecting the height of the water level in the water tank.
2. The ultrasonic aromatherapy device with constant spraying amount according to claim 1, wherein the water level detection module comprises a rectifying and filtering circuit and a water level detector, an output end of the water level detector is connected with an input end of the rectifying and filtering circuit, and an output end of the rectifying and filtering circuit is connected with a detection input end of the main control module.
3. The ultrasonic aromatherapy device with constant spraying amount according to claim 2, wherein the water level detector is disposed on an outer wall of the water tank, the water level detector comprises a water level detection PCB and an induction copper foil, the induction copper foil is disposed on the water level detection PCB, a gap is formed between two adjacent induction copper foils, and a single rectifying filter circuit is correspondingly connected with a single induction copper foil.
4. The constant spray volume ultrasonic aromatherapy device according to any one of claims 1 to 3, it is characterized in that the ultrasonic frequency sweeping module comprises a driving spraying circuit, the driving spraying circuit comprises a first resistor, a second resistor, a first MOS (metal oxide semiconductor) tube, a boosting inductor, a first capacitor and an ultrasonic atomizing sheet, the main control module comprises a signal output end for outputting a sweep frequency signal, the signal output end of the main control module is connected with the grid electrode of the first MOS tube through a first resistor, the first input end of the boosting inductor is connected with power supply voltage, the second input end of the boosting inductor is connected with the drain electrode of the first MOS tube, the output end of the boosting inductor is connected with one end of the ultrasonic atomization sheet through a first capacitor connected in series, the other end of the ultrasonic atomization piece is connected with a source electrode of a first MOS tube, and a grid electrode of the first MOS tube is connected with the source electrode of the first MOS tube through a second resistor.
5. The ultrasonic aromatherapy device with constant spraying volume according to claim 4, wherein the ultrasonic sweep module further comprises a sampling circuit, the main control module comprises a sampling input end, the sampling circuit comprises a second capacitor, a third resistor and a fourth resistor, the source of the first MOS transistor is connected to a power ground through being connected in series with the third resistor, the second capacitor is connected in parallel with the third resistor, one end of the second capacitor is connected to the sampling input end of the main control module through being connected in series with the fourth resistor, and the sampling input end of the main control module is connected to the power ground through being connected to the third capacitor.
6. The ultrasonic aromatherapy device with constant spray volume according to claim 5, wherein the ultrasonic sweep frequency module further comprises a DC voltage regulator circuit, the DC voltage regulator circuit comprises a fourth capacitor and a fifth capacitor, and the fourth capacitor and the fifth capacitor are respectively connected between a power supply voltage and a power supply ground.
7. The ultrasonic aromatherapy device with constant spraying amount according to claim 3, wherein the rectifying and filtering circuit comprises a third rectifying diode, a fifth resistor, an eighth resistor, a sixth capacitor and a second triode, a first input terminal of the third rectifying diode is electrically connected with one end of the fifth resistor and the power ground, a second input terminal of the third rectifying diode is electrically connected with the inductive copper foil, an output terminal of the third rectifying diode is connected with the other end of the fifth resistor, an output terminal of the third rectifying diode is connected with the base of the second triode by connecting the eighth resistor in series, an emitter of the second triode is connected with the power ground, a collector of the second triode is connected with the detection input terminal of the main control module, one end of the sixth capacitor is connected with the base of the second triode, the other end of the sixth capacitor is connected with an emitting electrode of the second triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822208181.3U CN209827670U (en) | 2018-12-26 | 2018-12-26 | Ultrasonic aromatherapy device with constant spraying amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822208181.3U CN209827670U (en) | 2018-12-26 | 2018-12-26 | Ultrasonic aromatherapy device with constant spraying amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209827670U true CN209827670U (en) | 2019-12-24 |
Family
ID=68900525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822208181.3U Withdrawn - After Issue CN209827670U (en) | 2018-12-26 | 2018-12-26 | Ultrasonic aromatherapy device with constant spraying amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209827670U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109620990A (en) * | 2018-12-26 | 2019-04-16 | 深圳飞安瑞科技股份有限公司 | A kind of ultrasonic wave fumigation device of constant spray amount |
-
2018
- 2018-12-26 CN CN201822208181.3U patent/CN209827670U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109620990A (en) * | 2018-12-26 | 2019-04-16 | 深圳飞安瑞科技股份有限公司 | A kind of ultrasonic wave fumigation device of constant spray amount |
| CN109620990B (en) * | 2018-12-26 | 2024-05-17 | 深圳飞安瑞科技股份有限公司 | Ultrasonic aromatherapy device with constant spraying quantity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109620990B (en) | Ultrasonic aromatherapy device with constant spraying quantity | |
| CN102695339B (en) | LED (light-emitting diode) drive circuit with high efficient and high power factor | |
| US8542500B2 (en) | Resonant power converting circuit | |
| KR20160012917A (en) | Secondary-side dynamic load detection and communication device | |
| CN209827670U (en) | Ultrasonic aromatherapy device with constant spraying amount | |
| CN102668291A (en) | Electrostatic atomization device | |
| CN101540546B (en) | Power factor correction circuit and power supply device thereof | |
| CN100477878C (en) | Power supply circuit especially for discharge lamp | |
| JP2003009528A (en) | Dc-dc converter, and control method there for | |
| CN109039305B (en) | Circuit for generating clock pulse signal based on alternating current | |
| JP6603763B2 (en) | Lighting system | |
| US8330549B1 (en) | Oscillator circuit with voltage booster | |
| JP6580044B2 (en) | Flyback type switching power supply circuit and backlight driving device using the same | |
| US20230387818A1 (en) | Synchronous Rectifier Scheme for Continuous Conduction Mode in Primary Side Controlled Fly-Back Converter | |
| CN108111031B (en) | Non-isolated single-chip AC/DC switch power supply control circuit | |
| JP6061019B2 (en) | Power transmission device and wireless power transmission system | |
| JP2004119206A (en) | Discharge lamp lighting device | |
| US20050219864A1 (en) | Power source apparatus | |
| JP5293961B2 (en) | LED drive circuit | |
| CN205847104U (en) | Fixed frequency, fixed pulse width, the high voltage direct current source circuit of input amplitude adjustment control | |
| JP2007267540A (en) | Switching power supply | |
| CN220457393U (en) | Ultrasonic controller based on electromagnetic compatibility technology | |
| US7492612B2 (en) | High-voltage generator | |
| CN218217110U (en) | BOOST circuit based on optical coupling isolation | |
| CN210807099U (en) | Switching power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20240517 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20240517 |