Streaming sterilization device, control method thereof, electronic equipment and storage medium

Abstract

The invention discloses a streamer sterilization device and a control method thereof, electronic equipment and a storage medium. The streamer sterilization device comprises a power supply driving circuit and a plasma generator, the power supply driving circuit comprises a booster circuit, a current control circuit, a current feedback circuit and a microcontroller, the low-voltage side power supply is boosted by the boosted circuit and then supplies power to the positive electrode of the plasma generator; a current control circuit and a current feedback circuit are arranged between the negative electrode and the grounding end; the microcontroller is provided with a first port for outputting a first PWM signal and a second port for outputting a second PWM signal, the input side of the booster circuit is provided with a first switch tube for conducting control based on the first PWM signal, and the current control circuit comprises a second switch tube for conducting control based on the second PWM signal. Therefore, the noise in the working process of the streamer sterilization device can be effectively reduced based on the adjustment of the first PWM signal and / or the second PWM signal.

Description

Technical Field

[0001] The present application relates to the field of circuits, and in particular to a streamer sterilization device and a control method thereof, an electronic device and a storage medium. Background Art

[0002] In the related art, there is a streamer sterilization device based on dielectric barrier discharge (DBD). The principle of DBD is a non-equilibrium gas discharge in which an insulating medium is inserted into the discharge space, that is, a gas discharge phenomenon of low-temperature discharge plasma is generated in the air gap by inserting an insulating medium into the air gap between two metal electrodes. Dielectric barrier discharge is also called dielectric barrier corona discharge or silent discharge. During the discharge process, the air will be ionized to generate plasma; it can be widely used in the production of ozone, modification, grafting, surface tension improvement, cleaning and hydrophilic modification of polymer and metal films and plates.

[0003] The DBD-based streamer sterilization device can achieve the functions of air purification and / or sterilization. For example, integrating the streamer sterilization device on the air conditioner can effectively kill bacteria in the air duct and the room, and purify the air well. However, when the current streamer sterilization device breaks through the air with a large instantaneous current, the air expands due to heat, which will make noise and affect the user experience.

[0004] In the related art, in order to solve the noise problem of the streamer sterilization device, the power of the streamer sterilization device is often reduced or a sound insulation device is installed at both ends of the electrode. However, reducing the power of the streamer sterilization device will reduce the sterilization effect; installing a sound insulation device at both ends of the electrode will hinder the flow of air between the two electrodes, affecting the sterilization effect. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a streamer sterilization device and a control method thereof, an electronic device and a storage medium, aiming to effectively reduce the noise during the operation of the streamer sterilization device.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a streamer sterilization device, comprising: a power drive circuit for boosting voltage and a plasma generator operating based on a drive power output by the power drive circuit;

[0008] The power drive circuit comprises: a boost circuit, a current control circuit, a current feedback circuit and a microcontroller; the low-voltage side power supply is boosted by the boost circuit to supply power to the positive electrode of the plasma generator, and the current control circuit and the current feedback circuit are arranged between the negative electrode of the plasma generator and the ground terminal;

[0009] Among them, the microcontroller has a first port for outputting a first PWM (Pulse width modulation) signal and a second port for outputting a second PWM signal, the input side of the boost circuit is provided with a first switch tube for conducting control based on the first PWM signal, the current control circuit includes a second switch tube for conducting control based on the second PWM signal, and the microcontroller also receives the electrical signal generated by the current feedback circuit.

[0010] In some embodiments, the streamer sterilization device further comprises:

[0011] The voltage doubler circuit is arranged between the output side of the voltage booster circuit and the positive electrode of the plasma generator.

[0012] In some embodiments, the boost circuit comprises:

[0013] Transformer, the first switch tube is arranged on the primary winding side of the transformer, and the voltage doubling circuit is arranged between the secondary winding of the transformer and the positive electrode of the plasma generator.

[0014] In a second aspect, the embodiment of the present application provides a control method of the streamer sterilization device as described in the first aspect of the embodiment of the present application, comprising:

[0015] The output voltage of the power driving circuit is adjusted based on the duty cycle of the first PWM signal.

[0016] In some embodiments, the method further comprises:

[0017] Based on the duty cycle of the second PWM signal, the on-current of the second switch tube is controlled to gradually increase.

[0018] In some implementation schemes, controlling the on-current of the second switch tube to gradually increase based on the duty cycle of the second PWM signal includes:

[0019] The duty cycle of the second PWM signal is controlled to increase at a set rate from an initial duty cycle until the second switch tube is saturated and turned on.

[0020] In some embodiments, after the second switch tube is saturated and turned on, the method further includes:

[0021] If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is less than the set current threshold, the duty cycle of the second PWM signal is increased until the on-current value is equal to the set current threshold, or the duty cycle of the second PWM signal reaches an upper limit value.

[0022] In some implementations, if the duty cycle of the second PWM signal reaches an upper limit and the on-current value is less than the set current threshold, the duty cycle of the first PWM signal is increased until the on-current value is equal to the set current threshold.

[0023] In some embodiments, after the second switch tube is saturated and turned on, the method further includes:

[0024] If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is greater than a set current threshold, the duty cycle of the second PWM signal is reduced until the on-current value is equal to the set current threshold.

[0025] In a third aspect, an embodiment of the present application provides a streamer sterilization device as described in the first aspect of the embodiment of the present application, wherein the microcontroller is configured to execute the method as described in the second aspect of the embodiment of the present application.

[0026] In a fourth aspect, an embodiment of the present application provides an electronic device, including: the streamer sterilization device described in the third aspect of the embodiment of the present application.

[0027] In some embodiments, the electronic device is an air conditioner.

[0028] In a fifth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the second aspect of the embodiment of the present application are implemented.

[0029] The technical solution provided by the embodiment of the present application is that the streamer sterilization device includes: a power drive circuit for boosting and a plasma generator that works based on the driving power output by the power drive circuit; the power drive circuit includes: a boost circuit, a current control circuit, a current feedback circuit and a microcontroller; the low-voltage side power supply is boosted by the boost circuit to supply power to the positive electrode of the plasma generator, and a current control circuit and a current feedback circuit are arranged between the negative electrode of the plasma generator and the ground terminal; wherein the microcontroller has a first port for outputting a first PWM signal and a second port for outputting a second PWM signal, a first switch tube for conducting control based on the first PWM signal is arranged on the input side of the boost circuit, the current control circuit includes a second switch tube for conducting control based on the second PWM signal, and the microcontroller also receives the electrical signal generated by the current feedback circuit. In this way, the noise during the operation of the streamer sterilization device can be effectively reduced based on the adjustment of the first PWM signal and / or the second PWM signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the streamer sterilization device according to an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of a current curve between a positive electrode and a negative electrode in the related art;

[0032] Figure 3 This is a circuit diagram of the streamer sterilization device according to an embodiment of the present application;

[0033] Figure 4 This is a circuit diagram of a streamer sterilization device in an application example of the present application;

[0034] Figure 5 A schematic diagram of a first PWM signal in an application example of the present application;

[0035] Figure 6 This is a flow chart of a control method of a streamer sterilization device according to an embodiment of the present application;

[0036] Figure 7 This is a flow chart of a control method of a streamer sterilization device in an application example of the present application;

[0037] Figure 8 Schematic diagram of a current curve between a positive electrode and a negative electrode in an application example of the present application. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] The present application embodiment provides a streamer sterilization device, such as Figure 1 As shown, the streamer sterilization device includes: a power drive circuit for boosting voltage and a plasma generator that works based on the drive power output by the power drive circuit.

[0041] The power drive circuit can convert low-voltage input power into high-voltage square wave output, so that the plasma generator discharges under the drive of the high-voltage square wave. During the discharge process, the air will be ionized to produce free radicals and highly oxidizing molecules, thereby achieving sterilization, deodorization and other effects, and achieving the purpose of streamer sterilization.

[0042] It is understandable that the plasma generator includes a positive electrode and a negative electrode that are spaced apart. The positive electrode and the negative electrode can break through the air under the action of the high voltage output by the power drive circuit, so that the current flows from the positive electrode to the negative electrode. At the moment of breaking through the air, the air exhibits capacitance characteristics, and the instantaneous current is very large, causing the surrounding air to heat and expand rapidly, thereby generating a lot of noise, and then exhibiting resistance characteristics. For example, the current curve between the positive electrode and the negative electrode is as follows: Figure 2 As shown, the horizontal axis represents time t and the vertical axis represents current I. Figure 2 It can be seen that the current I of the plasma generator is very large at the moment of air breakdown.

[0043] It can be seen that when the current streamer sterilization device breaks through the air with a large current in an instant, the air expands due to heat, which will make noise and affect the user experience. In particular, when the streamer sterilization device is used in indoor equipment such as air conditioners, frequent noise interference will affect the user's comfort.

[0044] Based on this, an embodiment of the present application provides a streamer sterilization device that can effectively reduce noise during operation.

[0045] like Figure 3 As shown, the power drive circuit of the embodiment of the present application includes: a boost circuit, a current control circuit, a current feedback circuit and a microcontroller unit (MCU). The low-voltage side power supply is boosted by the boost circuit and then supplies power to the positive electrode of the plasma generator. The current control circuit and the current feedback circuit are arranged between the negative electrode of the plasma generator and the ground terminal.

[0046] Among them, the microcontroller has a first port for outputting a first PWM signal and a second port for outputting a second PWM signal, the input side of the boost circuit is provided with a first switch tube for conducting control based on the first PWM signal, the current control circuit includes a second switch tube for conducting control based on the second PWM signal, and the microcontroller also receives the electrical signal generated by the current feedback circuit.

[0047] It can be understood that in the embodiment of the present application, since the microcontroller outputs the first PWM signal and the second PWM signal, the input side of the boost circuit is provided with a first switch tube for conduction control based on the first PWM signal, and the current control circuit includes a second switch tube for conduction control based on the second PWM signal. Among them, the magnitude of the output voltage V1 of the boost circuit can be adjusted based on the duty cycle adjustment of the first PWM signal, and the magnitude of the current between the positive electrode and the negative electrode of the plasma generator can be adjusted based on the duty cycle adjustment of the second PWM signal. In this way, the noise during the operation of the streamer sterilization device can be effectively reduced based on the adjustment of the first PWM signal and / or the second PWM signal.

[0048] Exemplarily, the streamer sterilization device further includes:

[0049] The voltage doubler circuit is arranged between the output side of the voltage booster circuit and the positive electrode of the plasma generator.

[0050] It can be understood that in order to further increase the voltage value of the driving power supply of the plasma generator, a voltage doubler circuit can be set between the output side of the boost circuit and the positive electrode. The voltage doubler circuit can increase the voltage V1 output by the boost circuit. For example, assuming that the boost multiple of the voltage doubler circuit is N, the voltage signal output by the voltage doubler circuit is N*V1.

[0051] Here, the voltage doubling circuit can be constructed based on fast recovery diodes and capacitors, and the voltage is gradually increased by utilizing the unidirectional conductivity of the diode (the characteristics of the switch) and the energy storage characteristics of the capacitor, thereby generating double voltage, triple voltage, and multiple voltage rectifier circuits.

[0052] For example, Figure 3 As shown, the boost circuit includes a transformer, the first switch tube is arranged on the primary winding side of the transformer, and the voltage doubling circuit is arranged between the secondary winding of the transformer and the positive electrode of the plasma generator. In this way, the transformer can be used for voltage boost conversion, and the voltage can be further boosted by the voltage doubling circuit to supply power to the positive electrode of the plasma generator.

[0053] Exemplarily, the plasma generator may be a dielectric barrier discharge generator for dielectric barrier discharge.

[0054] The streamer sterilization device of the embodiment of the present application is illustrated below with reference to an application example.

[0055] like Figure 4As shown, in this application example, the low-voltage side power supply (for example, a 12V DC power supply) is supplied to the primary winding of the transformer after self-oscillation by the self-oscillation circuit. Here, the self-oscillation circuit can be an LC oscillation circuit. L in the LC oscillation circuit represents inductance, C represents capacitance, and the time required for the self-oscillation circuit to complete a periodic change is called the period T, and the number of periodic changes completed in one second is called the frequency f, that is, f=1 / T. When electromagnetic oscillation occurs in the self-oscillation circuit, if there is no energy loss and it is not affected by other external factors, the period and frequency of the electromagnetic oscillation are called the natural frequency and natural period of the oscillation circuit. The natural period can be obtained using T=2π√LC. Exemplarily, the self-oscillation circuit can generate a sinusoidal wave signal.

[0056] In this application example, capacitor C1 and inductor L1 constitute a self-excited oscillation circuit, which outputs a sinusoidal wave signal to the primary winding of the transformer. The first end of the primary winding is connected to the output end of the self-excited oscillation circuit to receive the sinusoidal wave signal; the second end of the primary winding is grounded via the switch tube Q1 (i.e., the aforementioned first switch tube).

[0057] like Figure 4 As shown, the switch tube Q1 can be a triode, the collector of the switch tube Q1 is connected to the second end of the primary winding, the emitter of the switch tube Q1 is grounded, the base of the switch tube Q1 is connected to the first port of the microcontroller via the resistor R2, and the switch tube Q1 is intermittently turned on based on the first PWM signal output by the microcontroller.

[0058] Exemplarily, a resonant branch is also arranged between the first end and the second end of the primary winding, and the resonant branch includes: a diode D1, a resistor R1 and a capacitor C2, the cathode of the diode D1 is connected to the first end of the primary winding, the anode of the diode D1 is connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the second end of the primary winding, and the capacitor C2 is connected in parallel between the first end and the second end of the resistor R1.

[0059] Exemplarily, based on the duty cycle adjustment of the first PWM signal, the magnitude of the output voltage V1 of the secondary winding of the transformer can be adjusted. Figure 5 As shown, with the first PWM signal (ie Figure 5 As the duty cycle of the PWM1 signal shown in FIG. 1 decreases, the output voltage V1 of the secondary winding decreases accordingly.

[0060] Reference Figure 4 , the output voltage V1 of the secondary winding is amplified by the voltage doubler circuit, and the output voltage is N*V1. In this application example, N=3. The voltage signal output by the voltage doubler circuit is applied to the positive electrode of the dielectric barrier discharge generator.

[0061] The microcontroller also outputs a second PWM signal to the current control circuit, which includes: a resistor R3, a capacitor C6 and a transistor Q2, wherein the collector of the transistor Q2 is connected to the cathode electrode of the dielectric barrier discharge generator, the base of the transistor Q2 is connected to the first end of the resistor R3, the second end of the resistor R3 is connected to the second PWM signal, and the first end of the resistor R3 is also grounded via the capacitor C6. The emitter of the transistor Q2 is grounded via the current feedback circuit.

[0062] It can be understood that, based on the duty cycle adjustment of the second PWM signal, the current at the base of the transistor Q2 can be slowly increased, thereby slowly increasing the current that breaks down the positive electrode and the negative electrode, thereby avoiding excessive current at the moment of breakdown. In this way, the noise generated by the heating and expansion of the air caused by the excessive current at the moment of breakdown can be effectively avoided, thereby effectively reducing the noise during the startup phase.

[0063] Exemplarily, the current feedback circuit includes: a sampling resistor R7 and an operational amplifier, wherein the first end of the sampling resistor R7 is connected to the emitter of the transistor Q2, and the second end of the sampling resistor R7 is grounded. The first end of the sampling resistor R7 is also connected to the reverse input end of the operational amplifier via the resistor R5, and the second end of the sampling resistor R7 is also connected to the forward input end of the operational amplifier via the resistor R8, and a capacitor C5 and a resistor R4 connected in parallel are arranged between the reverse input end and the output end of the operational amplifier. The output end of the operational amplifier is connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the port of the microcontroller, and the second end of the resistor R6 is also grounded via the capacitor C4.

[0064] It can be understood that the microcontroller can receive the electrical signal generated by the current feedback circuit, determine the comparison result between the current current value of the sampling resistor R7 and the set current threshold based on the electrical signal, and then adjust the duty cycle of the first PWM signal and / or the second PWM signal based on the comparison result, so as to achieve constant current after the transistor Q2 is saturated and turned on, which can effectively reduce the generation of high-frequency noise.

[0065] The present application also provides a control method for the streamer sterilization device described in the above embodiment. Figure 6 As shown, the method includes:

[0066] Step 601: adjust the output voltage of the power driving circuit based on the duty cycle of the first PWM signal.

[0067] It is understandable that if Figure 5As shown, as the duty cycle of the first PWM signal decreases, the output voltage V1 of the secondary winding will decrease accordingly. In this way, the initial duty cycle of the first PWM signal can be reasonably set so that the output voltage of the power drive circuit meets the initial drive requirement, thereby meeting the balance between the air purification requirement and the noise reduction requirement of the streamer sterilization device by adjusting the voltage of the drive power supply.

[0068] Exemplarily, the control method further includes:

[0069] Step 602: Based on the duty cycle of the second PWM signal, control the on-current of the second switch tube to gradually increase.

[0070] It can be understood that, based on the adjustment of the duty cycle of the second PWM signal, the conduction current of the second switch tube of the current control circuit gradually increases. For example, Figure 4 The base current of the transistor Q2 gradually rises, so that the transistor Q2 can work in the amplification area, thereby effectively suppressing the breakdown current between the positive electrode and the negative electrode of the plasma generator, so that the breakdown current can rise smoothly in the startup phase, thereby reducing noise.

[0071] Exemplarily, controlling the on-current of the second switch tube to gradually increase based on the duty cycle of the second PWM signal includes:

[0072] The duty cycle of the second PWM signal is controlled to increase at a set rate from an initial duty cycle until the second switch tube is saturated and turned on.

[0073] Here, the microcontroller can control the second PWM signal to output from the initial duty cycle and increase at a set rate until the second switch tube is saturated and turned on. At this time, it can be understood that the microcontroller increases the duty cycle of the second PWM signal based on open-loop control, so that the base current of the second switch tube increases slowly, effectively reducing the noise in the startup phase.

[0074] In order to further optimize the working noise of the plasma generator, in some embodiments, after the second switch tube is saturated and turned on, the control method further includes:

[0075] If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is less than the set current threshold, the duty cycle of the second PWM signal is increased until the on-current value is equal to the set current threshold, or the duty cycle of the second PWM signal reaches an upper limit value.

[0076] Here, the set current threshold may be a numerical value or a range value, which is not limited in the embodiments of the present application.

[0077] Exemplarily, the current feedback circuit can generate an electrical signal representing a comparison result between the detected on-current value and the set current threshold, such as an electrical signal generated based on an operational amplifier, so that the microcontroller can determine the comparison result based on the level value of the electrical signal.

[0078] It is understandable that if the on-current value is less than the set current value, the duty cycle of the second PWM signal can be increased, for example, the duty cycle of the second PWM signal can be increased based on a set amplitude or ratio value to increase the on-current value.

[0079] Exemplarily, if the duty cycle of the second PWM signal reaches an upper limit and the on-current value is less than the set current threshold, the duty cycle of the first PWM signal is increased until the on-current value is equal to the set current threshold.

[0080] It can be understood that if the duty cycle of the second PWM signal reaches the upper limit value and the on-current value is still less than the set current threshold, the microcontroller can increase the duty cycle of the first PWM signal to increase the voltage of the driving power supply, thereby increasing the on-current value to the set current threshold, thereby achieving a constant current value after saturation conduction.

[0081] Exemplarily, after the second switch tube is saturated and turned on, the method further includes:

[0082] If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is greater than a set current threshold, the duty cycle of the second PWM signal is reduced until the on-current value is equal to the set current threshold.

[0083] It is understandable that if the microcontroller determines that the on-current value is greater than the set current threshold based on the electrical signal generated by the current feedback circuit, the duty cycle of the second PWM signal can be reduced so that the on-current value is maintained at the set current threshold.

[0084] The control method of the streamer sterilization device in the embodiment of the present application is illustrated below with reference to an application example.

[0085] like Figure 7 As shown, in this application example, the control method of the streamer sterilization device includes:

[0086] Step 701, MCU outputs PWM1 signal to control V1 voltage output.

[0087] Here, the MCU outputs a PWM1 signal (ie, a first PWM signal) with an initial duty cycle, so that the output voltage V1 of the secondary winding meets the initial driving requirement.

[0088] Step 702: The voltage V1 is boosted to N*V1 through a voltage doubling circuit.

[0089] Here, the voltage V1 is boosted to N*V1 by voltage doubling and connected to the positive electrode of the plasma generator.

[0090] Step 703: The electrode breaks down into air and discharges at a voltage of N*V1.

[0091] Here, air discharge can be broken down between the positive electrode and the negative electrode of the plasma generator at a voltage difference of N*V1.

[0092] Step 704: The MCU outputs a PWM2 signal to control the conduction current of the transistor to increase slowly.

[0093] Here, the MCU can control the second PWM signal to output from the initial duty cycle and increase at a set rate until the second switch tube is saturated and turned on, so that the base current of the second switch tube increases slowly, effectively reducing the noise in the startup phase.

[0094] Step 705, reading the current for feedback control.

[0095] Here, the MCU can perform feedback control based on the electrical signal fed back by the current feedback circuit after the second switch tube is saturated and turned on.

[0096] Step 706, reading the current on-state current I.

[0097] Here, the MCU can read the current on-current I based on the electrical signal generated by the current feedback circuit.

[0098] Step 707 , determining whether the conduction current I<the set current threshold I_set, if not, executing step 708 , if yes, executing step 710 .

[0099] Step 708 , determining whether the conduction current I> the set current threshold I_set, if so, executing step 709 .

[0100] Step 709, reducing the duty cycle n2 of PWM2.

[0101] Here, if it is determined that the on-current I>the set current threshold I_set, the PWM2 duty cycle n2 (ie, the duty cycle of the second PWM signal) can be reduced so that the adjusted on-current I is equal to the set current threshold I_set, maintaining the on-current stability of the second switch tube after the saturation channel.

[0102] Step 710, increasing the duty cycle n2 of PWM2.

[0103] Here, if it is determined that the on-current I<the set current threshold I_set, the PWM2 duty cycle n2 can be increased so that the adjusted on-current I is equal to the set current threshold I_set, and the on-current of the second switch tube after the saturation channel is maintained stable.

[0104] Step 711, determine whether the duty cycle n2 is the largest, if not, return to step 710, if yes, execute step 712.

[0105] Step 712, increasing the duty cycle n1 of PWM1 to increase V1.

[0106] It is understandable that if the duty cycle n2 of PWM2 has reached the maximum and the on-current I<the set current threshold I_set, the duty cycle n1 of PWM1 is increased to increase V1, thereby achieving the purpose of maintaining the on-current stability after the saturated channel of the second switch tube.

[0107] In this application example, based on the duty cycle adjustment of the first PWM signal and the second PWM signal, smooth control of the overshoot current when the air is broken down between the positive electrode and the negative electrode of the plasma generator and stable control of the conduction current in the saturation conduction stage are achieved. In this way, the noise caused by excessive breakdown current can be reduced, and the noise caused by current fluctuations after saturation conduction can be effectively reduced, thereby achieving the purpose of effectively suppressing working noise.

[0108] In an application example, the current curve between the positive electrode and the negative electrode of the plasma generator is as follows: Figure 8 As shown, the horizontal axis represents time t and the vertical axis represents current I. Figure 8 It can be known that during the startup phase of the plasma generator, based on the duty cycle adjustment of the second PWM signal, the on-current of the second switch tube is controlled to gradually increase, so that the second switch tube operates in the amplification area, effectively suppressing the breakdown current between the positive electrode and the negative electrode of the plasma generator, so that the breakdown current can rise smoothly during the startup phase, thereby reducing noise; after the second switch tube is saturated and turned on, based on the electrical signal fed back by the current feedback circuit, the duty cycle of the second PWM signal and / or the duty cycle of the first PWM signal is adjusted, so that the on-current after saturation conduction is stable, thereby effectively reducing the noise caused by current fluctuations.

[0109] It can be understood that the control method of the streamer sterilization device of the embodiment of the present application can be implemented by a microcontroller configuration program of the streamer sterilization device.

[0110] The embodiment of the present application also provides an electronic device, which includes the streamer sterilization device described above in the embodiment of the present application. In this way, based on the dielectric barrier discharge of the streamer sterilization device, sterilization, deodorization and other effects can be achieved, and the streamer sterilization device can effectively reduce working noise without reducing the sterilization ability, and achieve electrical isolation to improve work safety.

[0111] Exemplarily, the electronic device may be an air conditioner. The air conditioner is used to adjust the temperature, humidity, etc. of the environment. The air conditioner may be a cooling-only air conditioner or a cooling-heating dual-purpose air conditioner. The air conditioner may be a wall-mounted air conditioner, a cabinet-type air conditioner, a window-type air conditioner, or a ceiling-mounted air conditioner, etc., which is not specifically limited in the embodiments of the present application.

[0112] Exemplarily, the streamer sterilization device can be arranged in the air duct of the air conditioner, and can utilize the free radicals and highly oxidizing molecules generated by dielectric barrier discharge to eliminate bacteria in the air duct and indoor environment, thereby purifying the air well.

[0113] It is understandable that, in other embodiments, the electronic device may also be an electronic device with air purification function such as a fresh air blower.

[0114] In an exemplary embodiment, the present application embodiment further provides a storage medium, namely a computer storage medium, which can be a computer-readable storage medium, for example, a memory storing a computer program, and the computer program can be executed by a microprocessor of the streamer sterilization device to complete the steps described in the method of the present application embodiment. The computer-readable storage medium can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory.

[0115] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0116] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0117] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A streamer sterilization device, characterized in that: include: A power drive circuit for boosting voltage and a plasma generator operating based on the drive power output by the power drive circuit; The power drive circuit comprises: a boost circuit, a current control circuit, a current feedback circuit and a microcontroller; the low-voltage side power supply is boosted by the boost circuit to supply power to the positive electrode of the plasma generator, and the current control circuit and the current feedback circuit are arranged between the negative electrode of the plasma generator and the ground terminal; Among them, the microcontroller has a first port for outputting a first pulse width modulation PWM signal and a second port for outputting a second PWM signal, the input side of the boost circuit is provided with a first switch tube for conduction control based on the first PWM signal, the current control circuit includes a second switch tube for conduction control based on the second PWM signal, and the microcontroller also receives the electrical signal generated by the current feedback circuit.

2. The streamer sterilization device according to claim 1, characterized in that: The streamer sterilization device also includes: The voltage doubler circuit is arranged between the output side of the voltage booster circuit and the positive electrode of the plasma generator.

3. The streamer sterilization device according to claim 2, characterized in that: The boost circuit includes: a transformer, the first switch tube is arranged on the primary winding side of the transformer, and the voltage doubling circuit is arranged between the secondary winding of the transformer and the positive electrode of the plasma generator.

4. A control method for a streamer sterilization device according to any one of claims 1 to 3, characterized in that: include: The output voltage of the power driving circuit is adjusted based on the duty cycle of the first PWM signal.

5. The method according to claim 4, characterized in that The method further comprises: Based on the duty cycle of the second PWM signal, the on-current of the second switch tube is controlled to gradually increase.

6. The method according to claim 5, characterized in that The step of controlling the on-current of the second switch tube to gradually increase based on the duty cycle of the second PWM signal includes: The duty cycle of the second PWM signal is controlled to increase at a set rate from an initial duty cycle until the second switch tube is saturated and turned on.

7. The method according to claim 6, after the second switch tube is saturated and turned on, the method further comprises: If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is less than the set current threshold, the duty cycle of the second PWM signal is increased until the on-current value is equal to the set current threshold, or the duty cycle of the second PWM signal reaches an upper limit value.

8. The method according to claim 7, characterized in that If the duty cycle of the second PWM signal reaches an upper limit and the on-current value is less than the set current threshold, the duty cycle of the first PWM signal is increased until the on-current value is equal to the set current threshold.

9. The method according to claim 6, after the second switch tube is saturated and turned on, the method further comprises: If it is determined based on the electrical signal generated by the current feedback circuit that the on-current value of the second switch tube is greater than a set current threshold, the duty cycle of the second PWM signal is reduced until the on-current value is equal to the set current threshold.

10. A streamer sterilization device as claimed in any one of claims 1 to 3, characterized in that: The microcontroller is configured to perform the method according to any one of claims 4 to 9.

11. An electronic device, characterized in that: include: The streamer sterilization device as claimed in claim 10.

12. The electronic device according to claim 11, characterized in that: The electronic device is an air conditioner.

13. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 4 to 9 are implemented.

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