CN218298815U - Piezoelectric ceramic negative oxygen ion generator - Google Patents
Piezoelectric ceramic negative oxygen ion generator Download PDFInfo
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- CN218298815U CN218298815U CN202222519485.8U CN202222519485U CN218298815U CN 218298815 U CN218298815 U CN 218298815U CN 202222519485 U CN202222519485 U CN 202222519485U CN 218298815 U CN218298815 U CN 218298815U
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Abstract
The utility model discloses a piezoceramics negative oxygen ion generator, including anion generation module and shell, the anion generation module includes PCB control panel, piezoceramics transformer and anion output carbon brush, includes MUC, oscillation circuit, drive circuit, voltage doubling circuit, energy feedback circuit on the PCB control panel. The utility model belongs to the technical field of anion generator, specifically provide a detect through direct current high voltage output voltage feedback, adjust PWM output frequency, when preventing human electric shock risk, high-pressure side output is invariable, have small, the isolation voltage is high, safe and reliable's advantage, the suitability is wider, has improved anion generator's reliability and the piezoceramics negative oxygen ion generator of stability.
Description
Technical Field
The utility model belongs to the technical field of anion generator, mainly be applied to domestic air purifier, domestic air conditioner, refrigerator, car air purification, medical negative oxygen ion auxiliary treatment equipment etc. specifically indicate an integrated feedback control and frequency adjustable piezoceramics negative oxygen ion generator.
Background
Because the air pollution is more and more serious nowadays, particulate matters, particles, dust and viruses in the air are more and more serious, and the human health is seriously influenced. The air negative ions are also called negative oxygen ions, and refer to oxygen ions with 1 or more than 1 electron with negative charges. Researches show that the high-concentration negative oxygen ions have excellent effects of purifying and removing dust, can effectively improve the immunity of human bodies, and can effectively settle air dust, bacteria and the like to achieve the aim of purifying air.
The negative oxygen ions are rapidly diffused to the surrounding space under the action of a strong negative electric field. During the process of releasing negative charges to the surrounding air, the negative charges can quickly neutralize floating matters such as dust floats, bacteria and the like with positive charges, so that the floating matters are changed into neutral substances, and particulate matters, dust and viruses are quickly settled. Can effectively improve the sleep quality of a human body, improve the lung function, effectively reduce blood sugar, enhance the disease resistance, maintain the balance of important autonomic nerve functions of the body by negative oxygen ions and effectively treat insomnia caused by over-mental stress.
Most negative ion generators on the market all adopt high-voltage package coil to produce direct current high voltage in the twinkling of an eye, after through the rectification double voltage, output the negative high voltage of fixed voltage, discharge to the air through discharging, do not have energy feedback safety control circuit. Because of the problems of the structure and the manufacturing process of the high-voltage coil, the turn-to-turn short circuit of the high-voltage coil in the coil is only about 1500v, but the voltage of 3500v or more is needed when the voltage of air negative ions needs to be obtained, so that the transformer with high winding turns is easy to generate heat and cause the leakage breakdown of the coil when in work. In the process of voltage coupling, a high-voltage breakdown leakage phenomenon can be generated, a certain high-voltage alternating current is generated and is released into the air through a rectifier diode, and an ozone derivative can be generated due to the fact that the alternating current discharges into the air, so that electric shock hazard is caused to a human body and surrounding electrical equipment, the human body is easy to generate electric shock risks, and the power of a negative ion generator is uncontrollable.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming prior art's defect, the utility model provides a detect through direct current high voltage output voltage feedback, adjust PWM output frequency, when preventing human electric shock risk, high-pressure end output is invariable, and it is small to have, and isolation voltage is high, safe and reliable's advantage, and the suitability is wider, has improved the piezoceramics negative oxygen ion generator of anion generator's reliability and stability.
The utility model adopts the following technical scheme: the utility model relates to a piezoelectric ceramic negative oxygen ion generator, which comprises a negative ion generating module and a shell, wherein the shell is provided with an air inlet and an air outlet; the negative ion generating module comprises a PCB control board, a piezoelectric ceramic transformer and a negative ion output carbon brush, wherein the piezoelectric ceramic transformer is connected with the output end of the PCB control board, the piezoelectric ceramic transformer is used for converting alternating current generated by the PCB control board into direct current high voltage, the negative ion output carbon brush is connected with the output end of the piezoelectric ceramic transformer through a wire, and the negative ion output carbon brush outputs negative ions to the outside to the air.
As a preferred scheme, the PCB control board comprises a top plate, a middle plate and a bottom plate, wherein the top plate is formed by pressing a conductive silver paste layer and a ceramic plate, a high-insulation ceramic plate is sintered with a conductive silver paste layer of a fixed shape and is connected with the conductive silver paste layer through a via hole conductive probe, the middle plate is a middle conductive layer, the middle conductive layer is a conductive copper clad layer, the middle conductive layer is a bonding pad position where a wire is connected to the bottom plate through a via hole, a resistance voltage dividing circuit is arranged on the bottom plate, a resistance voltage dividing effect is achieved through the resistance voltage dividing circuit, current is converted into voltage, and the voltage is connected to an ADC sampling port along with a voltage signal Vout with variable Vin.
Vout = Vin/(R1 + R2) × R2, where Vout can be calculated.
Furthermore, the PCB control board comprises an MUC, an oscillating circuit, a driving circuit, a voltage doubling circuit and an energy feedback circuit;
the utility model discloses a drive circuit, including drive module, drive circuit, drive module, oscillating circuit, drive circuit's output and piezoelectric ceramic transformer, piezoelectric ceramic transformer is used for producing pure sine wave under the alternating voltage effect that drive module produced, voltage doubling circuit's input and piezoelectric ceramic transformer's output are connected, energy feedback circuit one end is connected with oscillating circuit, energy feedback circuit's the other end and voltage doubling circuit are connected, voltage doubling circuit be used for with piezoelectric ceramic transformer's output voltage enlargies once more, and through anion output carbon brush exports the anion to the air in.
Further, when the piezoelectric ceramic transformer discharges air, if a conductor is close to the piezoelectric ceramic transformer, voltage changes along with the close of the conductor, and the voltage on the conductive silver paste also changes. MUC reads the data change through inside ADC, reaches certain threshold value after, MCU can close PWM output to the danger of protection near human body by the electric shock.
Furthermore, the PCB control panel is formed by laminating a top plate, a middle plate and a bottom plate, and is manufactured by adopting a gold immersion process.
In a preferable scheme, the negative ion output carbon brush is a conductive carbon brush.
This scheme piezoelectric ceramic negative oxygen ion generator, mainly used solve among the prior art negative ion generator power uncontrollable to and the phenomenon of electric leakage, adopt above-mentioned structure the utility model discloses the beneficial effect who gains as follows:
1. and (3) integrally binding and packaging the MCU processor and the piezoelectric ceramic transformer by applying a chip SOP packaging technology. Then, the feedback magnetic stripe circuit designed by the scheme feeds back the voltage to an analog-to-digital conversion ADC input port of the MCU processor, and carries out direct-current high-voltage output voltage feedback detection to adjust PWM output frequency. The human body electric shock risk is prevented, and meanwhile, the output power of the high-voltage end is kept constant. The device has the advantages of small volume, high isolation voltage, safety and reliability. Because the isolation performance is good, positive charge aggregation can not be generated, the conversion efficiency is improved, and the device can be embedded into any household appliance application product.
2. The piezoelectric ceramic transformer is characterized in that the characteristics of positive and inverse piezoelectric effects of a piezoelectric ceramic material are utilized, the orientation characteristics of electrodes and polarization directions of the piezoelectric ceramic body are designed, the inverse piezoelectric effect is utilized to enable the piezoelectric ceramic body connected with an input end to generate mechanical vibration under the action of voltage, then the positive piezoelectric effect enables the piezoelectric ceramic body connected with an output end to generate voltage, an MCU is used for driving the piezoelectric ceramic transformer through outputting a PWM waveform with variable frequency, a driving sine wave with certain frequency is generated, mechanical energy is converted into electric energy, and the electric energy is output to a discharge carbon brush after being rectified and multiplied by a high-voltage silicon stack to discharge air, and the piezoelectric ceramic transformer has high insulativity, reliability and zero attenuation characteristics. The problem that the reliability and the stability of the negative ion generator are improved due to the ozone derivative generated by alternating current leakage when negative ions are generated is solved very skillfully.
3. The design of energy feedback circuit, under the condition that ionized air produced the anion, when the people was close to the end of discharging, because the human body has conductive property, high voltage output end voltage changes, feedback circuit read voltage through MCU and judge whether there is the conductor to be close to, turn-off high voltage output that can be quick, effectual protection is personal and equipment safety.
Drawings
FIG. 1 is a schematic diagram of a negative ion generating module according to the present embodiment;
FIG. 2 is a schematic diagram of the principle of the piezoelectric ceramic negative oxygen ion generator in the present embodiment;
FIG. 3 is a schematic circuit diagram of a driving circuit of a piezoelectric ceramic transformer in the present embodiment;
FIG. 4 is a schematic diagram of a circuit for PWM signal output to tell optical coupler isolation in the present scheme;
fig. 5 is a schematic circuit diagram of the MCU in the present embodiment.
Wherein, 1, a top layer plate, 2, a middle layer plate, 3 and a bottom layer plate.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1-5, the present invention relates to a piezoelectric ceramic negative oxygen ion generator, which comprises a negative ion generating module and a housing, wherein the housing is provided with an air inlet and an air outlet, the negative ion generating module is disposed in the housing, and the negative ion generating module is disposed at the air outlet of the housing; the negative ion generating module comprises a PCB control board, a piezoelectric ceramic transformer and a negative ion output carbon brush, wherein the piezoelectric ceramic transformer is connected with the output end of the PCB control board, the piezoelectric ceramic transformer is used for converting alternating current generated by the PCB control board into direct current high voltage, the negative ion output carbon brush is connected with the output end of the piezoelectric ceramic transformer through a wire, and the negative ion output carbon brush outputs negative ions to the outside to the air.
As shown in fig. 1, the PCB control board includes a top plate, a middle plate and a bottom plate, the top plate is a conductive silver paste layer and a ceramic wafer are pressed together, a conductive silver paste of a fixed shape is sintered on the high-insulation ceramic wafer and is connected with the high-insulation ceramic wafer through a via hole conductive probe, the middle plate is a middle conductive layer, the middle conductive layer is a conductive copper clad layer, the middle conductive layer is a pad position where a wire is connected to the bottom plate through a via hole, a resistance voltage dividing circuit is arranged on the bottom plate, a resistance voltage dividing effect is achieved through the resistance voltage dividing circuit, current is converted into voltage, and the voltage is connected to an ADC sampling port along with a voltage signal Vout that Vin is variable. The PCB control panel is formed by laminating a top plate, a middle plate and a bottom plate, and is manufactured by a gold immersion process.
As shown in fig. 2-3, the PCB control board includes a MUC, an oscillation circuit, a driving circuit, a voltage doubling circuit, and an energy feedback circuit;
the utility model discloses an energy feedback circuit, including drive module, oscillating circuit, drive module, voltage doubling circuit, energy feedback circuit, MUC, oscillating circuit is connected with MUC, oscillating circuit's output is connected with drive circuit's input, drive circuit is used for producing alternating voltage, drive circuit's output and piezoceramics transformer are connected, piezoceramics transformer is used for producing pure sine wave under the alternating voltage effect that drive module produced, voltage doubling circuit's input is connected with piezoceramics transformer's output, energy feedback circuit one end is connected with oscillating circuit, energy feedback circuit's the other end and voltage doubling circuit are connected, voltage doubling circuit be used for with piezoceramics transformer's output voltage enlargies once more, and passes through anion output carbon brush exports the anion to the air in to the outer.
Vout = Vin/(R1 + R2) × R2, and Vout can be calculated from the input voltage and the resistances of R1 and R2.
In the embodiment, when the piezoelectric ceramic transformer discharges air, if a conductor is close to the piezoelectric ceramic transformer, the voltage changes along with the close of the conductor, and the voltage on the conductive silver paste also changes.
MUC reads data change through the internal ADC, and after a certain threshold value is reached, the MCU can close PWM output, so that a close human body is protected from being shocked.
As shown in fig. 3, the circuit further includes a delay driving circuit based on the above, the delay starting circuit is composed of F1, R12, Q2, Q3, and R20, when 12V is supplied, because the internal resistance of the piezoelectric ceramic transformer is small, if the MCU does not normally output PWM control waveform, the starting current will be too large, and F1 self-recovery insurance overheating protection will be provided. The starting time of the Q3 is controlled by the MCU to realize delayed starting, after the MCU works normally, PWM output is configured firstly, after software delays for 1.5s, high level is output, and the Q3 is started to conduct the PMOS tube Q2 to supply power for the piezoelectric ceramic transformer. Therefore, the damage to the piezoelectric ceramics caused by overlarge current at the moment of electrifying is effectively avoided, the service life is prolonged, and the reliability of the whole circuit is improved. High-voltage Feedback signals in the energy Feedback circuit sequentially pass through R14, D3 and Q4, the back voltage is stabilized at about 6.2V, the base voltage of a protection switch triode Q4 cannot be damaged due to overvoltage, after the piezoelectric ceramic piece outputs high voltage, Q4 is conducted, the Feedback point R11 output end Feedback is changed into low level from high level, the MCU reads the voltage and is used for judging whether the ceramic piece is started normally, if the piezoelectric ceramic piece outputs high voltage, the MCU gives a low level signal to the Q3 base, the piezoelectric ceramic is turned off to supply power, and the whole circuit is protected.
As shown in fig. 4, after the PWM signal is output by the MCU and passes through the high-speed optocoupler U2, the PWM signal directly drives Q1, Q1 drives the step-up transformer T1, and a sinusoidal signal with a fixed frequency is applied to the piezoelectric ceramic to make the piezoelectric ceramic T2 generate physical vibration, thereby realizing conversion from mechanical energy to electrical energy, and then the piezoelectric ceramic connected to the output terminal generates voltage through a positive piezoelectric effect. The piezoelectric ceramic transformer is driven by the MCU processor through outputting a PWM waveform with variable frequency to generate a driving sine wave with certain frequency, the driving sine wave is converted into electric energy through mechanical energy, and then the electric energy is output to a discharge carbon brush after being rectified and multiplied by voltage through a high-voltage silicon stack to discharge air. The reliability and stability of the negative ion generator are improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, it should be understood that those skilled in the art should also understand the scope of the present invention without inventively designing the similar structure and embodiments of the present invention without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a piezoceramics negative oxygen ion generator, includes anion generation module and shell, be provided with air intake and air outlet on the shell, anion generation module locates in the shell, just anion generation module locates the air outlet department of shell, its characterized in that: the negative ion generating module comprises a PCB control board, a piezoelectric ceramic transformer and a negative ion output carbon brush, wherein the piezoelectric ceramic transformer is connected with the output end of the PCB control board, the piezoelectric ceramic transformer is used for converting alternating current generated by the PCB control board into direct current high voltage, the negative ion output carbon brush is connected with the output end of the piezoelectric ceramic transformer through a wire, and the negative ion output carbon brush outputs negative ions to the outside to the air.
2. The piezoelectric ceramic oxygen anion generator of claim 1, wherein: the PCB control panel comprises a top plate, a middle plate and a bottom plate, wherein the top plate is formed by pressing a conductive silver paste layer and a ceramic wafer, a piece of conductive silver paste with a fixed shape is sintered on the high-insulation ceramic wafer and is connected with the high-insulation ceramic wafer through a via hole conductive probe, the middle plate is a middle conductive layer, the middle conductive layer is a conductive copper clad layer, the middle conductive layer is a bonding pad position where a lead is connected to the bottom plate through a via hole, a resistance voltage division circuit is arranged on the bottom plate, the resistance voltage division circuit achieves a resistance voltage division effect, current is converted into voltage, and the voltage is connected to an ADC sampling port along with a voltage signal Vout with variable Vin.
3. The piezoelectric ceramic oxygen anion generator of claim 2, wherein: the PCB control panel comprises an MUC, an oscillating circuit, a driving circuit, a voltage doubling circuit and an energy feedback circuit;
the utility model discloses a drive circuit, including drive module, drive circuit, drive module, oscillating circuit, drive circuit's output and piezoelectric ceramic transformer, piezoelectric ceramic transformer is used for producing pure sine wave under the alternating voltage effect that drive module produced, voltage doubling circuit's input and piezoelectric ceramic transformer's output are connected, energy feedback circuit one end is connected with oscillating circuit, energy feedback circuit's the other end and voltage doubling circuit are connected, voltage doubling circuit be used for with piezoelectric ceramic transformer's output voltage enlargies once more, and through anion output carbon brush exports the anion to the air in.
4. The piezoelectric ceramic oxygen anion generator of claim 3, wherein: when the piezoelectric ceramic transformer discharges air, if a conductor is close to the piezoelectric ceramic transformer, voltage changes along with the close occurrence of the conductor, and the voltage on the conductive silver paste also changes.
5. The piezoelectric ceramic oxygen anion generator of claim 4, wherein: and the MUC reads the change of voltage data through the internal ADC to perform direct-current high-voltage output voltage feedback detection so as to adjust the PWM output frequency.
6. The piezoelectric ceramic oxygen anion generator of claim 5, wherein: the MUC reads the change of the voltage data through the internal ADC, and the MCU closes the PWM output after the voltage data reaches a certain threshold value.
7. The piezoelectric ceramic oxygen anion generator of claim 2, wherein: the PCB control panel is formed by laminating a top plate, a middle plate and a bottom plate, and is manufactured by a gold immersion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222519485.8U CN218298815U (en) | 2022-09-21 | 2022-09-21 | Piezoelectric ceramic negative oxygen ion generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222519485.8U CN218298815U (en) | 2022-09-21 | 2022-09-21 | Piezoelectric ceramic negative oxygen ion generator |
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| Publication Number | Publication Date |
|---|---|
| CN218298815U true CN218298815U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222519485.8U Active CN218298815U (en) | 2022-09-21 | 2022-09-21 | Piezoelectric ceramic negative oxygen ion generator |
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| CN (1) | CN218298815U (en) |
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- 2022-09-21 CN CN202222519485.8U patent/CN218298815U/en active Active
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