Ion generator circuit based on PWM control

Abstract

The utility model discloses an ion generator circuit based on PWM control. The ion generator circuit comprises a power supply module, a voltage processing module, an MUC module, a PWM drive circuit and a high-voltage discharge module. The output end of the power supply module is electrically connected with the input end of the voltage processing module, and the output end of the voltage processing module is electrically connected with the VCC end of the MUC module; the PWM end of the MUC module is electrically connected with the input end of the PWM drive circuit, and the output end of the PWM drive circuit is electrically connected with the input end of the high-voltage discharge module through the transformer module; and the PWM driving circuit drives a PWM voltage signal to be boosted through the transformer module, so that the positive discharge end and the negative discharge end of the high-voltage discharge module discharge to respectively ionize positive ions and negative ions.

Description

Technical Field

[0001] The utility model relates to power electronics technology, in particular to an ion generator circuit based on PWM control. Background Art

[0002] There are various types of existing ion generators for ionizing air, including DC ion generators, high-frequency ion generators, negative ion generators, plasma generators, and corona ionization, α ionization, and water air negative ion generators classified by different technical means. These ion generators play an important role in purifying air, improving the indoor environment, and enhancing human health. In existing ion generators, it is not easy to obtain a stable ion quantity, the voltage condition after being boosted by a transformer cannot be detected, and at the same time, the current of the drive circuit cannot be detected, and the PWM waveform cannot be adjusted based on the detected voltage and detected current; similarly, existing ionization technologies for ionizing water molecules consume a large amount of energy, such as electric energy, especially in a low-density medium such as air, and the efficiency of ionizing water molecules in the air may be further reduced. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies existing in the prior art, the utility model provides an ion generator circuit based on PWM control, which uses the PWM waveform generated by the MCU module to drive the transformer module to generate high voltage to ionize water molecules in the air to generate positive and negative ions, and adjusts the PWM waveform to stabilize the high voltage to obtain a stable ion quantity.

[0004] Technical Solution: To achieve the above object, an ion generator circuit based on PWM control of the utility model includes a power supply module, a voltage processing module, an MUC module, a PWM drive circuit, and a high-voltage discharge module; the output end of the power supply module is electrically connected to the input end of the voltage processing module, and the output end of the voltage processing module is electrically connected to the VCC end of the MUC module; the PWM end of the MUC module is electrically connected to the input end of the PWM drive circuit, and the output end of the PWM drive circuit is electrically connected to the input end of the high-voltage discharge module through a transformer module; the PWM drive circuit drives the PWM voltage signal to be boosted through the transformer module, so that the positive discharge end and the negative discharge end of the high-voltage discharge module discharge to ionize positive ions and negative ions respectively.

[0005] Further, the PWM drive circuit includes an R4 resistor and a Q1 triode; one end of the R4 resistor is electrically connected to the PWM end of the MUC module, and the other end of the R4 resistor is electrically connected to the base of the Q1 triode; the collector of the Q1 triode is electrically connected to the same-name end of the primary main winding of the transformer module, and the different-name end of the primary main winding is electrically connected to the input end of the voltage processing module.

[0006] Further, the high-voltage discharge module includes a D5 diode, a C10 capacitor, a C9 capacitor, a D6 diode, an R10 resistor, and an R11 resistor; one end of the R10 resistor serves as the positive discharge end, the other end of the R10 resistor is electrically connected to the negative electrode of the D5 diode, the positive electrode of the D5 diode is electrically connected to the opposite-named end of the secondary winding of the transformer module, and the other end of the R10 resistor is electrically connected to the same-named end of the secondary winding through the C9 capacitor; one end of the R11 resistor serves as the negative discharge end, the other end of the R11 resistor is electrically connected to the opposite-named end of the secondary winding through the C10 capacitor; and the other end of the R11 resistor is electrically connected to the positive electrode of the D6 diode, and the negative electrode of the D6 diode is electrically connected to the same-named end of the secondary winding of the transformer module.

[0007] Further, it also includes a transformer secondary winding voltage detection circuit; the transformer secondary winding voltage detection circuit includes a D4 diode, an R8 resistor, and an R5 resistor; the positive electrode of the D4 diode is electrically connected to the opposite-named end of the primary secondary winding of the transformer module, and the same-named end of the primary secondary winding is grounded; the negative electrode of the D4 diode is electrically connected to one end of the R8 resistor and the R5 resistor through the R8 resistor, and the other end of the R5 resistor is electrically connected to the ADC3 terminal of the MUC module.

[0008] Further, it also includes a drive current detection circuit; the drive current detection circuit includes an R6 resistor; one end of the R6 resistor is electrically connected to the emitter of the Q1 triode, and one end of the R6 resistor is grounded through the R9 resistor; the other end of the R6 resistor is electrically connected to the ADC2 terminal of the MUC module.

[0009] Further, it also includes a sampling voltage circuit; the sampling voltage circuit includes an R1 resistor and an R3 resistor; one end of the R1 resistor is electrically connected to the input terminal of the voltage processing module, and the other end of the R1 resistor is electrically connected to the ADC1 terminal of the MUC module through the R3 resistor.

[0010] Further, it also includes a filtering module. The filtering module includes a C1 capacitor and a C2 capacitor. One plate of the C1 capacitor is electrically connected to the output terminal of the power supply module, and the other plate of the C1 capacitor is grounded; one plate of the C2 capacitor is electrically connected to the input terminal of the voltage processing module, and the other plate of the C2 capacitor is grounded.

[0011] Beneficial effects: In a PWM control-based ion generator circuit of the present utility model, a PWM waveform generated by an MCU module is used to drive a transformer module to generate high voltage, enabling the high-voltage discharge module to ionize water molecules in the air to generate positive and negative ions; the high voltage generated by driving the transformer module with a PWM waveform not only saves power consumption but also ensures the ionization efficiency and a stable amount of ions. The MCU monitors the input voltage, adjusts the PWM waveform to stabilize the high voltage according to different input voltages to obtain a stable amount of ions, and stops working when overvoltage or undervoltage is detected to avoid product damage; the MCU monitors the current of the drive circuit, adjusts the PWM waveform to stabilize the high voltage according to different currents to obtain a stable amount of ions, and stops working when overcurrent abnormality or other high-voltage packets are detected to avoid safety accidents such as smoking; the MCU monitors the primary and secondary winding voltages to estimate the high voltage of the secondary winding of the transformer module, and adjusts the PWM waveform to stabilize the high voltage to obtain a stable amount of ions. Description of the Drawings

[0012] Figure 1 It is a circuit diagram of a PWM control-based ion generator;

[0013] Figure 2 It is a circuit connection diagram of the MUC module of the ion generator circuit;

[0014] Figure 3 It is a circuit connection diagram of the PWM drive circuit of the ion generator circuit;

[0015] Figure 4 It is an electrical connection diagram of the high-voltage discharge module and the transformer of the ion generator circuit. Detailed Embodiment

[0016] The present utility model will be further described below with reference to the drawings.

[0017] As Figure 1 shown, a PWM control-based ion generator circuit includes a power supply module 1, a voltage processing module 3, an MUC module 5, a PWM drive circuit 6, and a high-voltage discharge module 12; the output end of the power supply module 1 is electrically connected to the input end of the voltage processing module 3, and the output end of the voltage processing module 3 is electrically connected to the VCC end of the MUC module 5; the PWM end of the MUC module 5 is electrically connected to the input end of the PWM drive circuit 6, and the output end of the PWM drive circuit 6 is electrically connected to the input end of the high-voltage discharge module 12 through a transformer module; the PWM drive circuit 6 drives a PWM voltage signal to be boosted through the transformer module, enabling the positive discharge end and the negative discharge end of the high-voltage discharge module 12 to discharge and respectively ionize positive ions and negative ions.

[0018] Both GND terminals of the MUC module 5 are grounded. The power supply module 1 includes a power supply, and the GND terminal of the power supply is grounded; the voltage output by the power supply is 12V. The chip in the MUC module 5 is a PWM control chip that converts the input DC signal into a PWM voltage signal and outputs the PWM voltage signal. At the same time, the duty cycle of the PWM voltage signal can be adjusted through the PWM control chip; the MUC module 5 can also be a microcontroller.

[0019] As Figure 2 shown, it further includes a filtering module 2. The filtering module 2 includes a C1 capacitor and a C2 capacitor. One plate of the C1 capacitor is electrically connected to the output terminal of the power supply module, and the other plate of the C1 capacitor is grounded; one plate of the C2 capacitor is electrically connected to the input terminal of the voltage processing module, and the other plate of the C2 capacitor is grounded. The filtering module 2 filters the 12V voltage output by the power supply module 1 and inputs the filtered 12V voltage to the voltage processing module 3.

[0020] As Figure 2 shown, the voltage processing module 3 includes a U1 voltage processor and a C3 capacitor; the VI terminal of the U1 voltage processor is used as the input terminal of the voltage processing module 3, and the VO terminal of the U1 voltage processor is used as the output terminal of the voltage processing module 3; the GND terminal of the U1 voltage processor is grounded, and the VO terminal of the U1 voltage processor is grounded through the C3 capacitor. The voltage processing module 3 converts the 12V voltage of the power supply module 1 into a 5V voltage, and filters the voltage output by the voltage processing module 3 through the C3 capacitor.

[0021] As Figure 2 shown, it further includes a sampling voltage circuit 4; the sampling voltage circuit 4 includes an R1 resistor, an R3 resistor, a D2 diode, an R2 resistor, and a C4 capacitor; one end of the R1 resistor is electrically connected to the input terminal of the voltage processing module, and the other end of the R1 resistor is electrically connected to the ADC1 terminal of the MUC module 5 through the R3 resistor; the other end of the R1 resistor is grounded through the R2 resistor; the ADC1 terminal of the MUC module 5 is electrically connected to the negative electrode of the D2 diode, and the positive electrode of the D2 diode is grounded; and the ADC1 terminal of the MUC module 5 is grounded through the C4 capacitor. The sampling voltage circuit 4 divides the 12V voltage filtered by the filtering module 2 and inputs it to the MUC module 5 as a sampling voltage; the MUC module 5 changes the PWM waveform output by the MUC module 5 according to the detected sampling voltage, so as to stabilize the high voltage and obtain a stable output of the ion amount.

[0022] As Figure 3As shown, the PWM driving circuit 6 includes a resistor R4 and a triode Q1; one end of the resistor R4 is electrically connected to the PWM terminal of the MUC module 5, and the other end of the resistor R4 is electrically connected to the base of the triode Q1; the collector of the triode Q1 is electrically connected to the same-named end of the primary main winding 9 of the transformer module, and the different-named end of the primary main winding 9 is electrically connected to the input end of the voltage processing module 3; the base of the triode Q1 is grounded through a capacitor C7, and the collector of the triode Q1 is grounded through a capacitor C8.

[0023] As Figure 3 shown, it further includes a transformer secondary winding voltage detection circuit 8; the transformer secondary winding voltage detection circuit 8 includes a diode D4, a resistor R8, a resistor R5 and a diode D1; the positive electrode of the diode D4 is electrically connected to the different-named end of the primary secondary winding 10 of the transformer module, and the same-named end of the primary secondary winding 10 is grounded; the negative electrode of the diode D4 is electrically connected to one end of the resistor R5 through the resistor R8, and the other end of the resistor R5 is electrically connected to the ADC3 terminal of the MUC module 5; the other end of the resistor R5 is electrically connected to the negative electrode of the diode D1, the positive electrode of the diode D1 is grounded, and the other end of the resistor R5 is grounded through a capacitor C5; the negative electrode of the diode D4 is electrically connected to one end of the resistor R7 through the resistor R8, and the other end of the resistor R7 is grounded. The transformer secondary winding voltage detection 8 detects the voltage of the primary secondary winding 10 of the transformer and transmits the detected voltage of the primary secondary winding 10 to the ADC4 terminal of the MUC module 5; the MUC module 5 reversely infers the voltage of the secondary winding 11 after being boosted by the transformer based on the detected voltage, preventing the voltage of the secondary winding 11 from being too high; the MUC module 5 adjusts the waveform of the PWM signal according to different voltages, that is, adjusts the duty cycle of the PWM signal, so as to stabilize the high voltage of the high-voltage discharge module 12 and obtain a stable ion amount; when the voltage of the secondary winding 11 is too high or undervoltage, the MUC module 5 controls to cut off the output of the PWM voltage signal; avoiding damage to the ion generator.

[0024] As Figure 3As shown in the figure, it further includes a drive current detection circuit 7; the drive current detection circuit 7 includes a D3 diode, a C6 capacitor, and an R6 resistor; one end of the R6 resistor is electrically connected to the emitter of the Q1 triode, and one end of the R6 resistor is grounded through an R9 resistor; the other end of the R6 resistor is electrically connected to the ADC2 terminal of the MUC module 5; the other end of the R6 resistor is electrically connected to the negative electrode of the D3 diode, the positive electrode of the D3 diode is grounded, and the other end of the R6 resistor is grounded through the C6 capacitor. The drive current detection circuit 7 detects the drive current in the PWM drive circuit 6, and the drive current detection circuit 7 detects the emitter current of the Q1 triode in the PWM drive circuit 6 and inputs it to the ADC2 terminal in the MUC module 5. The MUC module 5 adjusts the waveform of the PWM voltage signal by detecting the drive current, that is, adjusts the duty cycle of the PWM signal, stabilizes the high voltage of the high-voltage discharge module 12, and thus obtains a stable and continuous amount of ions.

[0025] As Figure 4 shown in the figure, the high-voltage discharge module 12 includes a D5 diode, a C10 capacitor, a C9 capacitor, a D6 diode, an R10 resistor, and an R11 resistor; one end of the R10 resistor is used as the positive discharge terminal, the other end of the R10 resistor is electrically connected to the negative electrode of the D5 diode, the positive electrode of the D5 diode is electrically connected to the opposite-named end of the secondary winding 11 of the transformer module, and the other end of the R10 resistor is electrically connected to the same-named end of the secondary winding 11 through the C9 capacitor; one end of the R11 resistor is used as the negative discharge terminal, the other end of the R11 resistor is electrically connected to the opposite-named end of the secondary winding 11 through the C10 capacitor; and the other end of the R11 resistor is electrically connected to the positive electrode of the D6 diode, and the negative electrode of the D6 diode is electrically connected to the same-named end of the secondary winding 11 of the transformer module. The positive discharge terminal of the high-voltage discharge module 12 discharges, ionizes positive ions and outputs them; the negative discharge terminal discharges, ionizes negative ions and outputs them. As Figure 4 shown in the figure, pin 4 of the primary main winding 9 is the opposite-named end, and pin 3 is the same-named end; pin 5 of the primary secondary winding 10 is the opposite-named end, and pin 2 is the same-named end; pin 6 of the secondary winding 11 is the opposite-named end, and pin 1 is the same-named end; when the same-named end 3 is a positive pulse, the same-named ends 1 and 2 are also positive pulses; when the same-named end 3 is a negative pulse, the same-named ends 1 and 2 are also negative pulses.

[0026] The above is only a description of the preferred embodiment of the present utility model. Those of ordinary skill in the art can make several modifications and optimizations based on the above disclosure without departing from the basic principle content. These improvements and optimizations should be regarded as the protection scope understood by the present utility model.

Claims

1. An ion generator circuit based on PWM control, characterized in that: The invention comprises a power supply module (1), a voltage processing module (3), a MUC module (5), a PWM drive circuit (6) and a high-voltage discharge module (12); the output end of the power supply module (1) is electrically connected to the input end of the voltage processing module (3), and the output end of the voltage processing module (3) is electrically connected to the VCC end of the MUC module (5); the PWM end of the MUC module (5) is electrically connected to the input end of the PWM drive circuit (6), and the output end of the PWM drive circuit (6) is electrically connected to the input end of the high-voltage discharge module (12) through a transformer module; the PWM drive circuit (6) drives the PWM voltage signal to increase the voltage through the transformer module, so that the positive and negative discharge ends of the high-voltage discharge module (12) discharge to ionize positive ions and negative ions respectively.

2. The ion generator circuit based on PWM control according to claim 1, characterized in that: The PWM drive circuit (6) comprises an R4 resistor and a Q1 transistor; one end of the R4 resistor is electrically connected to the PWM end of the MUC module (5), and the other end of the R4 resistor is electrically connected to the base of the Q1 transistor; the collector of the Q1 transistor is electrically connected to the same-name end of the primary main winding (9) of the transformer module, and the opposite-name end of the primary main winding (9) is electrically connected to the input end of the voltage processing module (3).

3. The ion generator circuit based on PWM control according to claim 1, characterized in that: The high-voltage discharge module (12) comprises a D5 diode, a C10 capacitor, a C9 capacitor, a D6 diode, an R10 resistor and an R11 resistor; one end of the R10 resistor serves as a positive discharge end, the other end of the R10 resistor is electrically connected to the negative electrode of the D5 diode, the positive electrode of the D5 diode is electrically connected to the opposite end of the secondary winding (11) of the transformer module, and the other end of the R10 resistor is electrically connected to the same end of the secondary winding (11) through the C9 capacitor; one end of the R11 resistor serves as a negative discharge end, the other end of the R11 resistor is electrically connected to the opposite end of the secondary winding (11) through the C10 capacitor; and the other end of the R11 resistor is electrically connected to the positive electrode of the D6 diode, and the negative electrode of the D6 diode is electrically connected to the same end of the secondary winding (11) of the transformer module.

4. The ion generator circuit based on PWM control according to claim 1, characterized in that: It also includes a transformer secondary winding voltage detection circuit (8); the transformer secondary winding voltage detection circuit (8) includes a D4 diode, an R8 resistor and an R5 resistor; the positive pole of the D4 diode is electrically connected to the opposite-name end of the primary secondary winding (10) of the transformer module, and the same-name end of the primary secondary winding (10) is grounded; the negative pole of the D4 diode is electrically connected to one end of the R5 resistor through the R8 resistor, and the other end of the R5 resistor is electrically connected to the ADC3 end of the MUC module (5).

5. The ion generator circuit based on PWM control according to claim 1, characterized in that: It also includes a driving current detection circuit (7); the driving current detection circuit (7) includes an R6 resistor; one end of the R6 resistor is electrically connected to the emitter of the Q1 transistor, and one end of the R6 resistor is grounded through an R9 resistor; the other end of the R6 resistor is electrically connected to the ADC2 end of the MUC module (5).

6. The ion generator circuit based on PWM control according to claim 1, characterized in that: It also includes a sampling voltage circuit (4); the sampling voltage circuit (4) includes an R1 resistor and an R3 resistor; one end of the R1 resistor is electrically connected to the input end of the voltage processing module, and the other end of the R1 resistor is electrically connected to the ADC1 end of the MUC module (5) through the R3 resistor.

7. The ion generator circuit based on PWM control according to claim 1, characterized in that: It also includes a filtering module (2), the filtering module (2) including a C1 capacitor and a C2 capacitor, one plate of the C1 capacitor being electrically connected to the output end of the power supply module, and the other plate of the C1 capacitor being grounded; one plate of the C2 capacitor being electrically connected to the input end of the voltage processing module, and the other plate of the C2 capacitor being grounded.

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